mozilla-central/dom/canvas/ClientWebGLContext.cpp (file symbol)

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "ClientWebGLContext.h"
#include <bitset>
#include "ClientWebGLExtensions.h"
#include "gfxCrashReporterUtils.h"
#include "HostWebGLContext.h"
#include "js/PropertyAndElement.h" // JS_DefineElement
#include "js/ScalarType.h" // js::Scalar::Type
#include "mozilla/dom/Document.h"
#include "mozilla/dom/ToJSValue.h"
#include "mozilla/dom/TypedArray.h"
#include "mozilla/dom/WebGLContextEvent.h"
#include "mozilla/dom/WorkerCommon.h"
#include "mozilla/EnumeratedRange.h"
#include "mozilla/gfx/gfxVars.h"
#include "mozilla/gfx/CanvasManagerChild.h"
#include "mozilla/ipc/Shmem.h"
#include "mozilla/gfx/Swizzle.h"
#include "mozilla/layers/CompositableForwarder.h"
#include "mozilla/layers/CompositorBridgeChild.h"
#include "mozilla/layers/ImageBridgeChild.h"
#include "mozilla/layers/OOPCanvasRenderer.h"
#include "mozilla/layers/TextureClientSharedSurface.h"
#include "mozilla/layers/WebRenderUserData.h"
#include "mozilla/layers/WebRenderCanvasRenderer.h"
#include "mozilla/ResultVariant.h"
#include "mozilla/ScopeExit.h"
#include "mozilla/StaticPrefs_webgl.h"
#include "nsContentUtils.h"
#include "nsDisplayList.h"
#include "TexUnpackBlob.h"
#include "WebGLMethodDispatcher.h"
#include "WebGLChild.h"
#include "WebGLTextureUpload.h"
#include "WebGLValidateStrings.h"
namespace mozilla {
namespace webgl {
std::string SanitizeRenderer(const std::string&);
} // namespace webgl
// -
webgl::NotLostData::NotLostData(ClientWebGLContext& _context)
: context(_context) {}
webgl::NotLostData::~NotLostData() {
if (outOfProcess) {
outOfProcess->Destroy();
}
}
// -
bool webgl::ObjectJS::ValidateForContext(
const ClientWebGLContext& targetContext, const char* const argName) const {
if (!IsForContext(targetContext)) {
targetContext.EnqueueError(
LOCAL_GL_INVALID_OPERATION,
"`%s` is from a different (or lost) WebGL context.", argName);
return false;
}
return true;
}
void webgl::ObjectJS::WarnInvalidUse(const ClientWebGLContext& targetContext,
const char* const argName) const {
if (!ValidateForContext(targetContext, argName)) return;
const auto errEnum = ErrorOnDeleted();
targetContext.EnqueueError(errEnum, "Object `%s` is already deleted.",
argName);
}
// -
WebGLBufferJS::~WebGLBufferJS() {
const auto webgl = Context();
if (webgl) {
webgl->DeleteBuffer(this);
}
}
WebGLFramebufferJS::~WebGLFramebufferJS() {
const auto webgl = Context();
if (webgl) {
webgl->DeleteFramebuffer(this);
}
}
WebGLQueryJS::~WebGLQueryJS() {
const auto webgl = Context();
if (webgl) {
webgl->DeleteQuery(this);
}
}
WebGLRenderbufferJS::~WebGLRenderbufferJS() {
const auto webgl = Context();
if (webgl) {
webgl->DeleteRenderbuffer(this);
}
}
WebGLSamplerJS::~WebGLSamplerJS() {
const auto webgl = Context();
if (webgl) {
webgl->DeleteSampler(this);
}
}
WebGLSyncJS::~WebGLSyncJS() {
const auto webgl = Context();
if (webgl) {
webgl->DeleteSync(this);
}
}
WebGLTextureJS::~WebGLTextureJS() {
const auto webgl = Context();
if (webgl) {
webgl->DeleteTexture(this);
}
}
WebGLTransformFeedbackJS::~WebGLTransformFeedbackJS() {
const auto webgl = Context();
if (webgl) {
webgl->DeleteTransformFeedback(this);
}
}
WebGLVertexArrayJS::~WebGLVertexArrayJS() {
const auto webgl = Context();
if (webgl) {
webgl->DeleteVertexArray(this);
}
}
// -
static bool GetJSScalarFromGLType(GLenum type,
js::Scalar::Type* const out_scalarType) {
switch (type) {
case LOCAL_GL_BYTE:
*out_scalarType = js::Scalar::Int8;
return true;
case LOCAL_GL_UNSIGNED_BYTE:
*out_scalarType = js::Scalar::Uint8;
return true;
case LOCAL_GL_SHORT:
*out_scalarType = js::Scalar::Int16;
return true;
case LOCAL_GL_HALF_FLOAT:
case LOCAL_GL_HALF_FLOAT_OES:
case LOCAL_GL_UNSIGNED_SHORT:
case LOCAL_GL_UNSIGNED_SHORT_4_4_4_4:
case LOCAL_GL_UNSIGNED_SHORT_5_5_5_1:
case LOCAL_GL_UNSIGNED_SHORT_5_6_5:
*out_scalarType = js::Scalar::Uint16;
return true;
case LOCAL_GL_UNSIGNED_INT:
case LOCAL_GL_UNSIGNED_INT_2_10_10_10_REV:
case LOCAL_GL_UNSIGNED_INT_5_9_9_9_REV:
case LOCAL_GL_UNSIGNED_INT_10F_11F_11F_REV:
case LOCAL_GL_UNSIGNED_INT_24_8:
*out_scalarType = js::Scalar::Uint32;
return true;
case LOCAL_GL_INT:
*out_scalarType = js::Scalar::Int32;
return true;
case LOCAL_GL_FLOAT:
*out_scalarType = js::Scalar::Float32;
return true;
default:
return false;
}
}
ClientWebGLContext::ClientWebGLContext(const bool webgl2)
: mIsWebGL2(webgl2),
mExtLoseContext(new ClientWebGLExtensionLoseContext(*this)) {}
ClientWebGLContext::~ClientWebGLContext() { RemovePostRefreshObserver(); }
void ClientWebGLContext::JsWarning(const std::string& utf8) const {
nsIGlobalObject* global = nullptr;
if (mCanvasElement) {
mozilla::dom::Document* doc = mCanvasElement->OwnerDoc();
if (doc) {
global = doc->GetScopeObject();
}
} else if (mOffscreenCanvas) {
global = mOffscreenCanvas->GetOwnerGlobal();
}
dom::AutoJSAPI api;
if (!api.Init(global)) {
return;
}
const auto& cx = api.cx();
JS::WarnUTF8(cx, "%s", utf8.c_str());
}
void AutoJsWarning(const std::string& utf8) {
if (NS_IsMainThread()) {
const AutoJSContext cx;
JS::WarnUTF8(cx, "%s", utf8.c_str());
return;
}
JSContext* cx = dom::GetCurrentWorkerThreadJSContext();
if (NS_WARN_IF(!cx)) {
return;
}
JS::WarnUTF8(cx, "%s", utf8.c_str());
}
// ---------
bool ClientWebGLContext::DispatchEvent(const nsAString& eventName) const {
const auto kCanBubble = CanBubble::eYes;
const auto kIsCancelable = Cancelable::eYes;
bool useDefaultHandler = true;
if (mCanvasElement) {
nsContentUtils::DispatchTrustedEvent(mCanvasElement->OwnerDoc(),
mCanvasElement, eventName, kCanBubble,
kIsCancelable, &useDefaultHandler);
} else if (mOffscreenCanvas) {
// OffscreenCanvas case
RefPtr<dom::Event> event =
new dom::Event(mOffscreenCanvas, nullptr, nullptr);
event->InitEvent(eventName, kCanBubble, kIsCancelable);
event->SetTrusted(true);
useDefaultHandler = mOffscreenCanvas->DispatchEvent(
*event, dom::CallerType::System, IgnoreErrors());
}
return useDefaultHandler;
}
// -
void ClientWebGLContext::EmulateLoseContext() const {
const FuncScope funcScope(*this, "loseContext");
if (mLossStatus != webgl::LossStatus::Ready) {
JsWarning("loseContext: Already lost.");
if (!mNextError) {
mNextError = LOCAL_GL_INVALID_OPERATION;
}
return;
}
OnContextLoss(webgl::ContextLossReason::Manual);
}
void ClientWebGLContext::OnContextLoss(
const webgl::ContextLossReason reason) const {
JsWarning("WebGL context was lost.");
if (mNotLost) {
for (const auto& ext : mNotLost->extensions) {
if (!ext) continue;
ext->mContext = nullptr; // Detach.
}
mNotLost = {}; // Lost now!
mNextError = LOCAL_GL_CONTEXT_LOST_WEBGL;
}
switch (reason) {
case webgl::ContextLossReason::Guilty:
mLossStatus = webgl::LossStatus::LostForever;
break;
case webgl::ContextLossReason::None:
mLossStatus = webgl::LossStatus::Lost;
break;
case webgl::ContextLossReason::Manual:
mLossStatus = webgl::LossStatus::LostManually;
break;
}
const auto weak = WeakPtr<const ClientWebGLContext>(this);
const auto fnRun = [weak]() {
const auto strong = RefPtr<const ClientWebGLContext>(weak);
if (!strong) return;
strong->Event_webglcontextlost();
};
already_AddRefed<mozilla::CancelableRunnable> runnable =
NS_NewCancelableRunnableFunction("enqueue Event_webglcontextlost", fnRun);
NS_DispatchToCurrentThread(std::move(runnable));
}
void ClientWebGLContext::Event_webglcontextlost() const {
const bool useDefaultHandler = DispatchEvent(u"webglcontextlost"_ns);
if (useDefaultHandler) {
mLossStatus = webgl::LossStatus::LostForever;
}
if (mLossStatus == webgl::LossStatus::Lost) {
RestoreContext(webgl::LossStatus::Lost);
}
}
void ClientWebGLContext::RestoreContext(
const webgl::LossStatus requiredStatus) const {
if (requiredStatus != mLossStatus) {
JsWarning(
"restoreContext: Only valid iff context lost with loseContext().");
if (!mNextError) {
mNextError = LOCAL_GL_INVALID_OPERATION;
}
return;
}
MOZ_RELEASE_ASSERT(mLossStatus == webgl::LossStatus::Lost ||
mLossStatus == webgl::LossStatus::LostManually);
if (mAwaitingRestore) return;
mAwaitingRestore = true;
const auto weak = WeakPtr<const ClientWebGLContext>(this);
const auto fnRun = [weak]() {
const auto strong = RefPtr<const ClientWebGLContext>(weak);
if (!strong) return;
strong->Event_webglcontextrestored();
};
already_AddRefed<mozilla::CancelableRunnable> runnable =
NS_NewCancelableRunnableFunction("enqueue Event_webglcontextrestored",
fnRun);
NS_DispatchToCurrentThread(std::move(runnable));
}
void ClientWebGLContext::Event_webglcontextrestored() const {
mAwaitingRestore = false;
mLossStatus = webgl::LossStatus::Ready;
mNextError = 0;
uvec2 requestSize;
if (mCanvasElement) {
requestSize = {mCanvasElement->Width(), mCanvasElement->Height()};
} else if (mOffscreenCanvas) {
requestSize = {mOffscreenCanvas->Width(), mOffscreenCanvas->Height()};
} else {
MOZ_ASSERT_UNREACHABLE("no HTMLCanvasElement or OffscreenCanvas!");
return;
}
if (!requestSize.x) {
requestSize.x = 1;
}
if (!requestSize.y) {
requestSize.y = 1;
}
const auto mutThis = const_cast<ClientWebGLContext*>(
this); // TODO: Make context loss non-mutable.
if (!mutThis->CreateHostContext(requestSize)) {
mLossStatus = webgl::LossStatus::LostForever;
return;
}
mResetLayer = true;
(void)DispatchEvent(u"webglcontextrestored"_ns);
}
// ---------
void ClientWebGLContext::ThrowEvent_WebGLContextCreationError(
const std::string& text) const {
nsCString msg;
msg.AppendPrintf("Failed to create WebGL context: %s", text.c_str());
JsWarning(msg.BeginReading());
RefPtr<dom::EventTarget> target = mCanvasElement;
if (!target && mOffscreenCanvas) {
target = mOffscreenCanvas;
} else if (!target) {
return;
}
const auto kEventName = u"webglcontextcreationerror"_ns;
dom::WebGLContextEventInit eventInit;
// eventInit.mCancelable = true; // The spec says this, but it's silly.
eventInit.mStatusMessage = NS_ConvertASCIItoUTF16(text.c_str());
const RefPtr<dom::WebGLContextEvent> event =
dom::WebGLContextEvent::Constructor(target, kEventName, eventInit);
event->SetTrusted(true);
target->DispatchEvent(*event);
}
// -------------------------------------------------------------------------
// Client-side helper methods. Dispatch to a Host method.
// -------------------------------------------------------------------------
// If we are running WebGL in this process then call the HostWebGLContext
// method directly. Otherwise, dispatch over IPC.
template <typename MethodT, typename... Args>
void ClientWebGLContext::Run_WithDestArgTypes(
std::optional<JS::AutoCheckCannotGC>&& noGc, const MethodT method,
const size_t id, const Args&... args) const {
const auto notLost =
mNotLost; // Hold a strong-ref to prevent LoseContext=>UAF.
// `AutoCheckCannotGC` must be reset after the GC data is done being used but
// *before* the `notLost` destructor runs, since the latter can GC.
const auto cleanup = MakeScopeExit([&]() { noGc.reset(); });
if (IsContextLost()) {
return;
}
const auto& inProcess = notLost->inProcess;
if (inProcess) {
(inProcess.get()->*method)(args...);
return;
}
const auto& child = notLost->outOfProcess;
const auto info = webgl::SerializationInfo(id, args...);
const auto maybeDest = child->AllocPendingCmdBytes(info.requiredByteCount,
info.alignmentOverhead);
if (!maybeDest) {
noGc.reset(); // Reset early, as GC data will not be used, but JsWarning
// can GC.
JsWarning("Failed to allocate internal command buffer.");
OnContextLoss(webgl::ContextLossReason::None);
return;
}
const auto& destBytes = *maybeDest;
webgl::Serialize(destBytes, id, args...);
}
// -
#define RPROC(_METHOD) \
decltype(&HostWebGLContext::_METHOD), &HostWebGLContext::_METHOD
// ------------------------- Composition, etc -------------------------
void ClientWebGLContext::OnBeforePaintTransaction() { Present(nullptr); }
void ClientWebGLContext::EndComposition() {
// Mark ourselves as no longer invalidated.
MarkContextClean();
}
// -
layers::TextureType ClientWebGLContext::GetTexTypeForSwapChain() const {
const RefPtr<layers::ImageBridgeChild> imageBridge =
layers::ImageBridgeChild::GetSingleton();
return layers::TexTypeForWebgl(imageBridge);
}
void ClientWebGLContext::Present(WebGLFramebufferJS* const xrFb,
const bool webvr,
const webgl::SwapChainOptions& options) {
const auto texType = GetTexTypeForSwapChain();
Present(xrFb, texType, webvr, options);
}
// Fill in remote texture ids to SwapChainOptions if async present is enabled.
webgl::SwapChainOptions ClientWebGLContext::PrepareAsyncSwapChainOptions(
WebGLFramebufferJS* fb, bool webvr,
const webgl::SwapChainOptions& options) {
// Currently remote texture ids should only be set internally.
MOZ_ASSERT(!options.remoteTextureOwnerId.IsValid() &&
!options.remoteTextureId.IsValid());
// Async present only works when out-of-process. It is not supported in WebVR.
// Allow it if it is either forced or if the pref is set.
if (fb || webvr) {
return options;
}
if (!IsContextLost() && !mNotLost->inProcess &&
(options.forceAsyncPresent ||
StaticPrefs::webgl_out_of_process_async_present())) {
if (!mRemoteTextureOwnerId) {
mRemoteTextureOwnerId = Some(layers::RemoteTextureOwnerId::GetNext());
}
mLastRemoteTextureId = Some(layers::RemoteTextureId::GetNext());
webgl::SwapChainOptions asyncOptions = options;
asyncOptions.remoteTextureOwnerId = *mRemoteTextureOwnerId;
asyncOptions.remoteTextureId = *mLastRemoteTextureId;
return asyncOptions;
}
// Clear the current remote texture id so that we disable async.
mRemoteTextureOwnerId = Nothing();
return options;
}
void ClientWebGLContext::Present(WebGLFramebufferJS* const xrFb,
const layers::TextureType type,
const bool webvr,
const webgl::SwapChainOptions& options) {
if (!mIsCanvasDirty && !xrFb) return;
if (!xrFb) {
mIsCanvasDirty = false;
}
CancelAutoFlush();
webgl::SwapChainOptions asyncOptions =
PrepareAsyncSwapChainOptions(xrFb, webvr, options);
Run<RPROC(Present)>(xrFb ? xrFb->mId : 0, type, webvr, asyncOptions);
}
void ClientWebGLContext::CopyToSwapChain(
WebGLFramebufferJS* const fb, const webgl::SwapChainOptions& options) {
CancelAutoFlush();
const auto texType = GetTexTypeForSwapChain();
webgl::SwapChainOptions asyncOptions =
PrepareAsyncSwapChainOptions(fb, false, options);
Run<RPROC(CopyToSwapChain)>(fb ? fb->mId : 0, texType, asyncOptions);
}
void ClientWebGLContext::EndOfFrame() {
CancelAutoFlush();
Run<RPROC(EndOfFrame)>();
}
Maybe<layers::SurfaceDescriptor> ClientWebGLContext::GetFrontBuffer(
WebGLFramebufferJS* const fb, bool vr) {
const FuncScope funcScope(*this, "<GetFrontBuffer>");
if (IsContextLost()) return {};
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetFrontBuffer(fb ? fb->mId : 0, vr);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
// Always synchronously get the front buffer if not using a remote texture.
bool needsSync = true;
Maybe<layers::SurfaceDescriptor> syncDesc;
Maybe<layers::SurfaceDescriptor> remoteDesc;
auto& info = child->GetFlushedCmdInfo();
// If valid remote texture data was set for async present, then use it.
if (!fb && !vr && mRemoteTextureOwnerId && mLastRemoteTextureId) {
const auto tooManyFlushes = 10;
// If there are many flushed cmds, force synchronous IPC to avoid too many
// pending ipc messages. Otherwise don't sync for other cases to avoid any
// performance penalty.
needsSync = XRE_IsParentProcess() ||
gfx::gfxVars::WebglOopAsyncPresentForceSync() ||
info.flushesSinceLastCongestionCheck > tooManyFlushes;
// Only send over a remote texture descriptor if the WebGLChild actor is
// alive to ensure the remote texture id is valid.
if (child->CanSend()) {
remoteDesc = Some(layers::SurfaceDescriptorRemoteTexture(
*mLastRemoteTextureId, *mRemoteTextureOwnerId));
}
}
if (needsSync &&
!child->SendGetFrontBuffer(fb ? fb->mId : 0, vr, &syncDesc)) {
return {};
}
// Reset flushesSinceLastCongestionCheck
info.flushesSinceLastCongestionCheck = 0;
info.congestionCheckGeneration++;
// If there is a remote texture descriptor, use that preferentially, as the
// sync front buffer descriptor was only created to force a sync first.
return remoteDesc ? remoteDesc : syncDesc;
}
Maybe<layers::SurfaceDescriptor> ClientWebGLContext::PresentFrontBuffer(
WebGLFramebufferJS* const fb, const layers::TextureType type, bool webvr) {
Present(fb, type, webvr);
return GetFrontBuffer(fb, webvr);
}
already_AddRefed<layers::FwdTransactionTracker>
ClientWebGLContext::UseCompositableForwarder(
layers::CompositableForwarder* aForwarder) {
if (mRemoteTextureOwnerId) {
return layers::FwdTransactionTracker::GetOrCreate(mFwdTransactionTracker);
}
return nullptr;
}
void ClientWebGLContext::OnDestroyChild(dom::WebGLChild* aChild) {
// Since NotLostData may be destructing at this point, the RefPtr to
// WebGLChild may be unreliable. Instead, it must be explicitly passed in.
if (mRemoteTextureOwnerId && mFwdTransactionTracker &&
mFwdTransactionTracker->IsUsed()) {
(void)aChild->SendWaitForTxn(
*mRemoteTextureOwnerId,
layers::ToRemoteTextureTxnType(mFwdTransactionTracker),
layers::ToRemoteTextureTxnId(mFwdTransactionTracker));
}
}
void ClientWebGLContext::ClearVRSwapChain() { Run<RPROC(ClearVRSwapChain)>(); }
// -
bool ClientWebGLContext::UpdateWebRenderCanvasData(
nsDisplayListBuilder* aBuilder, WebRenderCanvasData* aCanvasData) {
CanvasRenderer* renderer = aCanvasData->GetCanvasRenderer();
if (!IsContextLost() && !mResetLayer && renderer) {
return true;
}
const auto& size = DrawingBufferSize();
if (!IsContextLost() && !renderer && mNotLost->mCanvasRenderer &&
mNotLost->mCanvasRenderer->GetSize() == gfx::IntSize(size.x, size.y) &&
aCanvasData->SetCanvasRenderer(mNotLost->mCanvasRenderer)) {
mNotLost->mCanvasRenderer->SetDirty();
mResetLayer = false;
return true;
}
renderer = aCanvasData->CreateCanvasRenderer();
if (!InitializeCanvasRenderer(aBuilder, renderer)) {
// Clear CanvasRenderer of WebRenderCanvasData
aCanvasData->ClearCanvasRenderer();
return false;
}
mNotLost->mCanvasRenderer = renderer;
MOZ_ASSERT(renderer);
mResetLayer = false;
return true;
}
bool ClientWebGLContext::InitializeCanvasRenderer(
nsDisplayListBuilder* aBuilder, CanvasRenderer* aRenderer) {
const FuncScope funcScope(*this, "<InitializeCanvasRenderer>");
if (IsContextLost()) return false;
layers::CanvasRendererData data;
data.mContext = this;
data.mOriginPos = gl::OriginPos::BottomLeft;
const auto& options = *mInitialOptions;
const auto& size = DrawingBufferSize();
if (IsContextLost()) return false;
data.mIsOpaque = !options.alpha;
data.mIsAlphaPremult = !options.alpha || options.premultipliedAlpha;
data.mSize = {size.x, size.y};
if (aBuilder->IsPaintingToWindow() && mCanvasElement) {
data.mDoPaintCallbacks = true;
}
aRenderer->Initialize(data);
aRenderer->SetDirty();
return true;
}
void ClientWebGLContext::UpdateCanvasParameters() {
if (!mOffscreenCanvas) {
return;
}
const auto& options = *mInitialOptions;
const auto& size = DrawingBufferSize();
mozilla::dom::OffscreenCanvasDisplayData data;
data.mOriginPos = gl::OriginPos::BottomLeft;
data.mIsOpaque = !options.alpha;
data.mIsAlphaPremult = !options.alpha || options.premultipliedAlpha;
data.mSize = {size.x, size.y};
data.mDoPaintCallbacks = false;
mOffscreenCanvas->UpdateDisplayData(data);
}
layers::LayersBackend ClientWebGLContext::GetCompositorBackendType() const {
if (mCanvasElement) {
return mCanvasElement->GetCompositorBackendType();
} else if (mOffscreenCanvas) {
return mOffscreenCanvas->GetCompositorBackendType();
}
return layers::LayersBackend::LAYERS_NONE;
}
mozilla::dom::Document* ClientWebGLContext::GetOwnerDoc() const {
MOZ_ASSERT(mCanvasElement);
if (!mCanvasElement) {
return nullptr;
}
return mCanvasElement->OwnerDoc();
}
void ClientWebGLContext::Commit() {
if (mOffscreenCanvas) {
mOffscreenCanvas->CommitFrameToCompositor();
}
}
void ClientWebGLContext::GetCanvas(
dom::Nullable<dom::OwningHTMLCanvasElementOrOffscreenCanvas>& retval) {
if (mCanvasElement) {
MOZ_RELEASE_ASSERT(!mOffscreenCanvas, "GFX: Canvas is offscreen.");
if (mCanvasElement->IsInNativeAnonymousSubtree()) {
retval.SetNull();
} else {
retval.SetValue().SetAsHTMLCanvasElement() = mCanvasElement;
}
} else if (mOffscreenCanvas) {
retval.SetValue().SetAsOffscreenCanvas() = mOffscreenCanvas;
} else {
retval.SetNull();
}
}
void ClientWebGLContext::GetContextAttributes(
dom::Nullable<dom::WebGLContextAttributes>& retval) {
retval.SetNull();
const FuncScope funcScope(*this, "getContextAttributes");
if (IsContextLost()) return;
dom::WebGLContextAttributes& result = retval.SetValue();
const auto& options = mNotLost->info.options;
result.mAlpha.Construct(options.alpha);
result.mDepth = options.depth;
result.mStencil = options.stencil;
result.mAntialias.Construct(options.antialias);
result.mPremultipliedAlpha = options.premultipliedAlpha;
result.mPreserveDrawingBuffer = options.preserveDrawingBuffer;
result.mFailIfMajorPerformanceCaveat = options.failIfMajorPerformanceCaveat;
result.mPowerPreference = options.powerPreference;
}
// -----------------------
NS_IMETHODIMP
ClientWebGLContext::SetDimensions(const int32_t signedWidth,
const int32_t signedHeight) {
const FuncScope funcScope(*this, "<SetDimensions>");
MOZ_ASSERT(mInitialOptions);
if (mLossStatus != webgl::LossStatus::Ready) {
// Attempted resize of a lost context.
return NS_OK;
}
uvec2 size = {static_cast<uint32_t>(signedWidth),
static_cast<uint32_t>(signedHeight)};
if (!size.x) {
size.x = 1;
}
if (!size.y) {
size.y = 1;
}
const auto prevRequestedSize = mRequestedSize;
mRequestedSize = size;
mResetLayer = true; // Always treat this as resize.
if (mNotLost) {
auto& state = State();
auto curSize = prevRequestedSize;
if (state.mDrawingBufferSize) {
curSize = *state.mDrawingBufferSize;
}
if (size == curSize) return NS_OK; // MUST skip no-op resize
state.mDrawingBufferSize = Nothing();
Run<RPROC(Resize)>(size);
UpdateCanvasParameters();
MarkCanvasDirty();
return NS_OK;
}
// -
// Context (re-)creation
if (!CreateHostContext(size)) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
void ClientWebGLContext::ResetBitmap() {
const auto size = DrawingBufferSize();
Run<RPROC(Resize)>(size); // No-change resize still clears/resets everything.
}
static bool IsWebglOutOfProcessEnabled() {
if (StaticPrefs::webgl_out_of_process_force()) {
return true;
}
if (!gfx::gfxVars::AllowWebglOop()) {
return false;
}
if (!NS_IsMainThread()) {
return StaticPrefs::webgl_out_of_process_worker();
}
return StaticPrefs::webgl_out_of_process();
}
bool ClientWebGLContext::CreateHostContext(const uvec2& requestedSize) {
const auto pNotLost = std::make_shared<webgl::NotLostData>(*this);
auto& notLost = *pNotLost;
auto res = [&]() -> Result<Ok, std::string> {
auto options = *mInitialOptions;
if (StaticPrefs::webgl_disable_fail_if_major_performance_caveat()) {
options.failIfMajorPerformanceCaveat = false;
}
if (options.failIfMajorPerformanceCaveat) {
const auto backend = GetCompositorBackendType();
bool isCompositorSlow = false;
isCompositorSlow |= (backend == layers::LayersBackend::LAYERS_WR &&
gfx::gfxVars::UseSoftwareWebRender());
if (isCompositorSlow) {
return Err(
"failIfMajorPerformanceCaveat: Compositor is not"
" hardware-accelerated.");
}
}
const bool resistFingerprinting =
ShouldResistFingerprinting(RFPTarget::WebGLRenderCapability);
const auto principalKey = GetPrincipalHashValue();
const auto initDesc = webgl::InitContextDesc{
.isWebgl2 = mIsWebGL2,
.resistFingerprinting = resistFingerprinting,
.principalKey = principalKey,
.size = requestedSize,
.options = options,
};
// -
auto useOop = IsWebglOutOfProcessEnabled();
if (XRE_IsParentProcess()) {
useOop = false;
}
if (!useOop) {
notLost.inProcess =
HostWebGLContext::Create({this, nullptr}, initDesc, &notLost.info);
return Ok();
}
// -
ScopedGfxFeatureReporter reporter("IpcWebGL");
auto* const cm = gfx::CanvasManagerChild::Get();
if (NS_WARN_IF(!cm)) {
return Err("!CanvasManagerChild::Get()");
}
RefPtr<dom::WebGLChild> outOfProcess = new dom::WebGLChild(*this);
outOfProcess =
static_cast<dom::WebGLChild*>(cm->SendPWebGLConstructor(outOfProcess));
if (!outOfProcess) {
return Err("SendPWebGLConstructor failed");
}
// Clear RemoteTextureOwnerId. HostWebGLContext is going to be replaced in
// WebGLParent.
if (mRemoteTextureOwnerId.isSome()) {
mRemoteTextureOwnerId = Nothing();
mFwdTransactionTracker = nullptr;
}
if (!outOfProcess->SendInitialize(initDesc, &notLost.info)) {
return Err("WebGL actor Initialize failed");
}
notLost.outOfProcess = outOfProcess;
reporter.SetSuccessful();
return Ok();
}();
if (!res.isOk()) {
auto str = res.unwrapErr();
if (StartsWith(str, "failIfMajorPerformanceCaveat")) {
str +=
" (about:config override available:"
" webgl.disable-fail-if-major-performance-caveat)";
}
notLost.info.error = str;
}
if (!notLost.info.error->empty()) {
ThrowEvent_WebGLContextCreationError(notLost.info.error);
return false;
}
mNotLost = pNotLost;
UpdateCanvasParameters();
MarkCanvasDirty();
// Init state
const auto& limits = Limits();
auto& state = State();
state.mDefaultTfo = new WebGLTransformFeedbackJS(*this);
state.mDefaultVao = new WebGLVertexArrayJS(*this);
state.mBoundTfo = state.mDefaultTfo;
state.mBoundVao = state.mDefaultVao;
(void)state.mBoundBufferByTarget[LOCAL_GL_ARRAY_BUFFER];
state.mTexUnits.resize(limits.maxTexUnits);
state.mBoundUbos.resize(limits.maxUniformBufferBindings);
{
webgl::TypedQuad initVal;
const float fData[4] = {0, 0, 0, 1};
memcpy(initVal.data.data(), fData, initVal.data.size());
state.mGenericVertexAttribs.resize(limits.maxVertexAttribs, initVal);
}
const auto& size = DrawingBufferSize();
state.mViewport = {0, 0, static_cast<int32_t>(size.x),
static_cast<int32_t>(size.y)};
state.mScissor = state.mViewport;
if (mIsWebGL2) {
// Insert keys to enable slots:
(void)state.mBoundBufferByTarget[LOCAL_GL_COPY_READ_BUFFER];
(void)state.mBoundBufferByTarget[LOCAL_GL_COPY_WRITE_BUFFER];
(void)state.mBoundBufferByTarget[LOCAL_GL_PIXEL_PACK_BUFFER];
(void)state.mBoundBufferByTarget[LOCAL_GL_PIXEL_UNPACK_BUFFER];
(void)state.mBoundBufferByTarget[LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER];
(void)state.mBoundBufferByTarget[LOCAL_GL_UNIFORM_BUFFER];
(void)state.mCurrentQueryByTarget[LOCAL_GL_ANY_SAMPLES_PASSED];
//(void)state.mCurrentQueryByTarget[LOCAL_GL_ANY_SAMPLES_PASSED_CONSERVATIVE];
//// Same slot as ANY_SAMPLES_PASSED.
(void)state
.mCurrentQueryByTarget[LOCAL_GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN];
}
state.mIsEnabledMap = Some(webgl::MakeIsEnabledMap(mIsWebGL2));
return true;
}
std::unordered_map<GLenum, bool> webgl::MakeIsEnabledMap(const bool webgl2) {
auto ret = std::unordered_map<GLenum, bool>{};
ret[LOCAL_GL_BLEND] = false;
ret[LOCAL_GL_CULL_FACE] = false;
ret[LOCAL_GL_DEPTH_TEST] = false;
ret[LOCAL_GL_DITHER] = true;
ret[LOCAL_GL_POLYGON_OFFSET_FILL] = false;
ret[LOCAL_GL_SAMPLE_ALPHA_TO_COVERAGE] = false;
ret[LOCAL_GL_SAMPLE_COVERAGE] = false;
ret[LOCAL_GL_SCISSOR_TEST] = false;
ret[LOCAL_GL_STENCIL_TEST] = false;
if (webgl2) {
ret[LOCAL_GL_RASTERIZER_DISCARD] = false;
}
return ret;
}
// -------
uvec2 ClientWebGLContext::DrawingBufferSize() {
if (IsContextLost()) return {};
const auto notLost =
mNotLost; // Hold a strong-ref to prevent LoseContext=>UAF.
auto& state = State();
auto& size = state.mDrawingBufferSize;
if (!size) {
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
size = Some(inProcess->DrawingBufferSize());
} else {
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
uvec2 actual = {};
if (!child->SendDrawingBufferSize(&actual)) return {};
size = Some(actual);
}
}
return *size;
}
void ClientWebGLContext::OnMemoryPressure() {
if (IsContextLost()) return;
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->OnMemoryPressure();
}
const auto& child = mNotLost->outOfProcess;
(void)child->SendOnMemoryPressure();
}
NS_IMETHODIMP
ClientWebGLContext::SetContextOptions(JSContext* cx,
JS::Handle<JS::Value> options,
ErrorResult& aRvForDictionaryInit) {
if (mInitialOptions && options.isNullOrUndefined()) return NS_OK;
dom::WebGLContextAttributes attributes;
if (!attributes.Init(cx, options)) {
aRvForDictionaryInit.Throw(NS_ERROR_UNEXPECTED);
return NS_ERROR_UNEXPECTED;
}
WebGLContextOptions newOpts;
newOpts.stencil = attributes.mStencil;
newOpts.depth = attributes.mDepth;
newOpts.premultipliedAlpha = attributes.mPremultipliedAlpha;
newOpts.preserveDrawingBuffer = attributes.mPreserveDrawingBuffer;
newOpts.failIfMajorPerformanceCaveat =
attributes.mFailIfMajorPerformanceCaveat;
newOpts.xrCompatible = attributes.mXrCompatible;
newOpts.powerPreference = attributes.mPowerPreference;
newOpts.enableDebugRendererInfo =
StaticPrefs::webgl_enable_debug_renderer_info();
MOZ_ASSERT(mCanvasElement || mOffscreenCanvas);
newOpts.shouldResistFingerprinting =
ShouldResistFingerprinting(RFPTarget::WebGLRenderCapability);
if (attributes.mAlpha.WasPassed()) {
newOpts.alpha = attributes.mAlpha.Value();
}
if (attributes.mAntialias.WasPassed()) {
newOpts.antialias = attributes.mAntialias.Value();
}
newOpts.ignoreColorSpace = true;
if (attributes.mColorSpace.WasPassed()) {
newOpts.ignoreColorSpace = false;
newOpts.colorSpace = attributes.mColorSpace.Value();
}
// Don't do antialiasing if we've disabled MSAA.
if (!StaticPrefs::webgl_msaa_samples()) {
newOpts.antialias = false;
}
// -
if (mInitialOptions && *mInitialOptions != newOpts) {
// Err if the options asked for aren't the same as what they were
// originally.
return NS_ERROR_FAILURE;
}
mXRCompatible = attributes.mXrCompatible;
mInitialOptions.emplace(newOpts);
return NS_OK;
}
void ClientWebGLContext::DidRefresh() { Run<RPROC(DidRefresh)>(); }
already_AddRefed<gfx::SourceSurface> ClientWebGLContext::GetSurfaceSnapshot(
gfxAlphaType* const out_alphaType) {
const FuncScope funcScope(*this, "<GetSurfaceSnapshot>");
if (IsContextLost()) return nullptr;
const auto notLost =
mNotLost; // Hold a strong-ref to prevent LoseContext=>UAF.
auto ret = BackBufferSnapshot();
if (!ret) return nullptr;
// -
const auto& options = mNotLost->info.options;
auto srcAlphaType = gfxAlphaType::Opaque;
if (options.alpha) {
if (options.premultipliedAlpha) {
srcAlphaType = gfxAlphaType::Premult;
} else {
srcAlphaType = gfxAlphaType::NonPremult;
}
}
if (out_alphaType) {
*out_alphaType = srcAlphaType;
} else {
// Expects Opaque or Premult
if (srcAlphaType == gfxAlphaType::NonPremult) {
const gfx::DataSourceSurface::ScopedMap map(
ret, gfx::DataSourceSurface::READ_WRITE);
MOZ_RELEASE_ASSERT(map.IsMapped(), "Failed to map snapshot surface!");
const auto& size = ret->GetSize();
const auto format = ret->GetFormat();
bool rv =
gfx::PremultiplyData(map.GetData(), map.GetStride(), format,
map.GetData(), map.GetStride(), format, size);
MOZ_RELEASE_ASSERT(rv, "PremultiplyData failed!");
}
}
return ret.forget();
}
RefPtr<gfx::SourceSurface> ClientWebGLContext::GetFrontBufferSnapshot(
const bool requireAlphaPremult) {
const FuncScope funcScope(*this, "<GetSurfaceSnapshot>");
if (IsContextLost()) return nullptr;
const auto notLost =
mNotLost; // Hold a strong-ref to prevent LoseContext=>UAF.
const auto& options = mNotLost->info.options;
const auto surfFormat = options.alpha ? gfx::SurfaceFormat::B8G8R8A8
: gfx::SurfaceFormat::B8G8R8X8;
const auto fnNewSurf = [&](const uvec2 size) {
const auto stride = size.x * 4;
return RefPtr<gfx::DataSourceSurface>(
gfx::Factory::CreateDataSourceSurfaceWithStride({size.x, size.y},
surfFormat, stride,
/*zero=*/true));
};
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
const auto maybeSize = inProcess->FrontBufferSnapshotInto({});
if (!maybeSize) return nullptr;
const auto& surfSize = *maybeSize;
const auto stride = surfSize.x * 4;
const auto byteSize = stride * surfSize.y;
const auto surf = fnNewSurf(surfSize);
if (!surf) return nullptr;
{
const gfx::DataSourceSurface::ScopedMap map(
surf, gfx::DataSourceSurface::READ_WRITE);
if (!map.IsMapped()) {
MOZ_ASSERT(false);
return nullptr;
}
MOZ_RELEASE_ASSERT(map.GetStride() == static_cast<int64_t>(stride));
auto range = Range<uint8_t>{map.GetData(), byteSize};
if (!inProcess->FrontBufferSnapshotInto(Some(range))) {
gfxCriticalNote << "ClientWebGLContext::GetFrontBufferSnapshot: "
"FrontBufferSnapshotInto(some) failed after "
"FrontBufferSnapshotInto(none)";
return nullptr;
}
if (requireAlphaPremult && options.alpha && !options.premultipliedAlpha) {
bool rv = gfx::PremultiplyData(
map.GetData(), map.GetStride(), gfx::SurfaceFormat::R8G8B8A8,
map.GetData(), map.GetStride(), gfx::SurfaceFormat::B8G8R8A8,
surf->GetSize());
MOZ_RELEASE_ASSERT(rv, "PremultiplyData failed!");
} else {
bool rv = gfx::SwizzleData(
map.GetData(), map.GetStride(), gfx::SurfaceFormat::R8G8B8A8,
map.GetData(), map.GetStride(), gfx::SurfaceFormat::B8G8R8A8,
surf->GetSize());
MOZ_RELEASE_ASSERT(rv, "SwizzleData failed!");
}
}
return surf;
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
webgl::FrontBufferSnapshotIpc res;
if (!child->SendGetFrontBufferSnapshot(&res)) {
res = {};
}
if (!res.shmem) return nullptr;
const auto& surfSize = res.surfSize;
const webgl::RaiiShmem shmem{child, res.shmem.ref()};
if (!shmem) return nullptr;
const auto& shmemBytes = shmem.ByteRange();
if (!surfSize.x) return nullptr; // Zero means failure.
const auto stride = surfSize.x * 4;
const auto byteSize = stride * surfSize.y;
const auto surf = fnNewSurf(surfSize);
if (!surf) return nullptr;
{
const gfx::DataSourceSurface::ScopedMap map(
surf, gfx::DataSourceSurface::READ_WRITE);
if (!map.IsMapped()) {
MOZ_ASSERT(false);
return nullptr;
}
MOZ_RELEASE_ASSERT(shmemBytes.length() == byteSize);
if (requireAlphaPremult && options.alpha && !options.premultipliedAlpha) {
bool rv = gfx::PremultiplyData(
shmemBytes.begin().get(), stride, gfx::SurfaceFormat::R8G8B8A8,
map.GetData(), map.GetStride(), gfx::SurfaceFormat::B8G8R8A8,
surf->GetSize());
MOZ_RELEASE_ASSERT(rv, "PremultiplyData failed!");
} else {
bool rv = gfx::SwizzleData(shmemBytes.begin().get(), stride,
gfx::SurfaceFormat::R8G8B8A8, map.GetData(),
map.GetStride(), gfx::SurfaceFormat::B8G8R8A8,
surf->GetSize());
MOZ_RELEASE_ASSERT(rv, "SwizzleData failed!");
}
}
return surf;
}
RefPtr<gfx::DataSourceSurface> ClientWebGLContext::BackBufferSnapshot() {
if (IsContextLost()) return nullptr;
const auto notLost =
mNotLost; // Hold a strong-ref to prevent LoseContext=>UAF.
const auto& options = mNotLost->info.options;
const auto& state = State();
const auto drawFbWas = state.mBoundDrawFb;
const auto readFbWas = state.mBoundReadFb;
const auto pboWas =
Find(state.mBoundBufferByTarget, LOCAL_GL_PIXEL_PACK_BUFFER);
const auto size = DrawingBufferSize();
// -
BindFramebuffer(LOCAL_GL_FRAMEBUFFER, nullptr);
if (pboWas) {
BindBuffer(LOCAL_GL_PIXEL_PACK_BUFFER, nullptr);
}
auto reset = MakeScopeExit([&] {
if (drawFbWas == readFbWas) {
BindFramebuffer(LOCAL_GL_FRAMEBUFFER, drawFbWas);
} else {
BindFramebuffer(LOCAL_GL_DRAW_FRAMEBUFFER, drawFbWas);
BindFramebuffer(LOCAL_GL_READ_FRAMEBUFFER, readFbWas);
}
if (pboWas) {
BindBuffer(LOCAL_GL_PIXEL_PACK_BUFFER, pboWas);
}
});
const auto surfFormat = options.alpha ? gfx::SurfaceFormat::B8G8R8A8
: gfx::SurfaceFormat::B8G8R8X8;
const auto stride = size.x * 4;
RefPtr<gfx::DataSourceSurface> surf =
gfx::Factory::CreateDataSourceSurfaceWithStride(
{size.x, size.y}, surfFormat, stride, /*zero=*/true);
if (NS_WARN_IF(!surf)) {
// Was this an OOM or alloc-limit? (500MB is our default resource size
// limit)
surf = gfx::Factory::CreateDataSourceSurfaceWithStride({1, 1}, surfFormat,
4, /*zero=*/true);
if (!surf) {
// Still failed for a 1x1 size.
gfxCriticalError() << "CreateDataSourceSurfaceWithStride(surfFormat="
<< surfFormat << ") failed.";
}
return nullptr;
}
{
const gfx::DataSourceSurface::ScopedMap map(
surf, gfx::DataSourceSurface::READ_WRITE);
if (!map.IsMapped()) {
MOZ_ASSERT(false);
return nullptr;
}
MOZ_ASSERT(static_cast<uint32_t>(map.GetStride()) == stride);
const auto desc = webgl::ReadPixelsDesc{{0, 0}, size};
const auto pixels = Span<uint8_t>(map.GetData(), stride * size.y);
if (!DoReadPixels(desc, pixels)) return nullptr;
// RGBA->BGRA and flip-y.
MOZ_RELEASE_ASSERT(gfx::SwizzleYFlipData(
pixels.data(), stride, gfx::SurfaceFormat::R8G8B8A8, pixels.data(),
stride, gfx::SurfaceFormat::B8G8R8A8, {size.x, size.y}));
}
return surf;
}
UniquePtr<uint8_t[]> ClientWebGLContext::GetImageBuffer(
int32_t* out_format, gfx::IntSize* out_imageSize) {
*out_format = 0;
*out_imageSize = {};
// Use GetSurfaceSnapshot() to make sure that appropriate y-flip gets applied
gfxAlphaType any;
RefPtr<gfx::SourceSurface> snapshot = GetSurfaceSnapshot(&any);
if (!snapshot) return nullptr;
RefPtr<gfx::DataSourceSurface> dataSurface = snapshot->GetDataSurface();
const auto& premultAlpha = mNotLost->info.options.premultipliedAlpha;
*out_imageSize = dataSurface->GetSize();
if (ShouldResistFingerprinting(RFPTarget::CanvasRandomization)) {
return gfxUtils::GetImageBufferWithRandomNoise(
dataSurface, premultAlpha, GetCookieJarSettings(), out_format);
}
return gfxUtils::GetImageBuffer(dataSurface, premultAlpha, out_format);
}
NS_IMETHODIMP
ClientWebGLContext::GetInputStream(const char* mimeType,
const nsAString& encoderOptions,
nsIInputStream** out_stream) {
// Use GetSurfaceSnapshot() to make sure that appropriate y-flip gets applied
gfxAlphaType any;
RefPtr<gfx::SourceSurface> snapshot = GetSurfaceSnapshot(&any);
if (!snapshot) return NS_ERROR_FAILURE;
RefPtr<gfx::DataSourceSurface> dataSurface = snapshot->GetDataSurface();
const auto& premultAlpha = mNotLost->info.options.premultipliedAlpha;
if (ShouldResistFingerprinting(RFPTarget::CanvasRandomization)) {
return gfxUtils::GetInputStreamWithRandomNoise(
dataSurface, premultAlpha, mimeType, encoderOptions,
GetCookieJarSettings(), out_stream);
}
return gfxUtils::GetInputStream(dataSurface, premultAlpha, mimeType,
encoderOptions, out_stream);
}
// ------------------------- Client WebGL Objects -------------------------
// ------------------------- Create/Destroy/Is -------------------------
template <typename T>
static already_AddRefed<T> AsAddRefed(T* ptr) {
RefPtr<T> rp = ptr;
return rp.forget();
}
template <typename T>
static RefPtr<T> AsRefPtr(T* ptr) {
return {ptr};
}
already_AddRefed<WebGLBufferJS> ClientWebGLContext::CreateBuffer() const {
const FuncScope funcScope(*this, "createBuffer");
if (IsContextLost()) return nullptr;
auto ret = AsRefPtr(new WebGLBufferJS(*this));
Run<RPROC(CreateBuffer)>(ret->mId);
return ret.forget();
}
already_AddRefed<WebGLFramebufferJS> ClientWebGLContext::CreateFramebuffer()
const {
const FuncScope funcScope(*this, "createFramebuffer");
if (IsContextLost()) return nullptr;
auto ret = AsRefPtr(new WebGLFramebufferJS(*this));
Run<RPROC(CreateFramebuffer)>(ret->mId);
return ret.forget();
}
already_AddRefed<WebGLFramebufferJS>
ClientWebGLContext::CreateOpaqueFramebuffer(
const webgl::OpaqueFramebufferOptions& options) const {
const FuncScope funcScope(*this, "createOpaqueFramebuffer");
if (IsContextLost()) return nullptr;
auto ret = AsRefPtr(new WebGLFramebufferJS(*this, true));
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
if (!inProcess->CreateOpaqueFramebuffer(ret->mId, options)) {
ret = nullptr;
}
return ret.forget();
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
bool ok = false;
if (!child->SendCreateOpaqueFramebuffer(ret->mId, options, &ok))
return nullptr;
if (!ok) return nullptr;
return ret.forget();
}
already_AddRefed<WebGLProgramJS> ClientWebGLContext::CreateProgram() const {
const FuncScope funcScope(*this, "createProgram");
if (IsContextLost()) return nullptr;
auto ret = AsRefPtr(new WebGLProgramJS(*this));
Run<RPROC(CreateProgram)>(ret->mId);
return ret.forget();
}
already_AddRefed<WebGLQueryJS> ClientWebGLContext::CreateQuery() const {
const FuncScope funcScope(*this, "createQuery");
if (IsContextLost()) return nullptr;
auto ret = AsRefPtr(new WebGLQueryJS(*this));
Run<RPROC(CreateQuery)>(ret->mId);
return ret.forget();
}
already_AddRefed<WebGLRenderbufferJS> ClientWebGLContext::CreateRenderbuffer()
const {
const FuncScope funcScope(*this, "createRenderbuffer");
if (IsContextLost()) return nullptr;
auto ret = AsRefPtr(new WebGLRenderbufferJS(*this));
Run<RPROC(CreateRenderbuffer)>(ret->mId);
return ret.forget();
}
already_AddRefed<WebGLSamplerJS> ClientWebGLContext::CreateSampler() const {
const FuncScope funcScope(*this, "createSampler");
if (IsContextLost()) return nullptr;
auto ret = AsRefPtr(new WebGLSamplerJS(*this));
Run<RPROC(CreateSampler)>(ret->mId);
return ret.forget();
}
already_AddRefed<WebGLShaderJS> ClientWebGLContext::CreateShader(
const GLenum type) const {
const FuncScope funcScope(*this, "createShader");
if (IsContextLost()) return nullptr;
switch (type) {
case LOCAL_GL_VERTEX_SHADER:
case LOCAL_GL_FRAGMENT_SHADER:
break;
default:
EnqueueError_ArgEnum("type", type);
return nullptr;
}
auto ret = AsRefPtr(new WebGLShaderJS(*this, type));
Run<RPROC(CreateShader)>(ret->mId, ret->mType);
return ret.forget();
}
already_AddRefed<WebGLSyncJS> ClientWebGLContext::FenceSync(
const GLenum condition, const GLbitfield flags) const {
const FuncScope funcScope(*this, "fenceSync");
if (IsContextLost()) return nullptr;
if (condition != LOCAL_GL_SYNC_GPU_COMMANDS_COMPLETE) {
EnqueueError_ArgEnum("condition", condition);
return nullptr;
}
if (flags) {
EnqueueError(LOCAL_GL_INVALID_VALUE, "`flags` must be 0.");
return nullptr;
}
auto ret = AsRefPtr(new WebGLSyncJS(*this));
Run<RPROC(CreateSync)>(ret->mId);
auto& availRunnable = EnsureAvailabilityRunnable();
availRunnable.mSyncs.push_back(ret.get());
ret->mCanBeAvailable = false;
AutoEnqueueFlush();
return ret.forget();
}
already_AddRefed<WebGLTextureJS> ClientWebGLContext::CreateTexture() const {
const FuncScope funcScope(*this, "createTexture");
if (IsContextLost()) return nullptr;
auto ret = AsRefPtr(new WebGLTextureJS(*this));
Run<RPROC(CreateTexture)>(ret->mId);
return ret.forget();
}
already_AddRefed<WebGLTransformFeedbackJS>
ClientWebGLContext::CreateTransformFeedback() const {
const FuncScope funcScope(*this, "createTransformFeedback");
if (IsContextLost()) return nullptr;
auto ret = AsRefPtr(new WebGLTransformFeedbackJS(*this));
Run<RPROC(CreateTransformFeedback)>(ret->mId);
return ret.forget();
}
already_AddRefed<WebGLVertexArrayJS> ClientWebGLContext::CreateVertexArray()
const {
const FuncScope funcScope(*this, "createVertexArray");
if (IsContextLost()) return nullptr;
auto ret = AsRefPtr(new WebGLVertexArrayJS(*this));
Run<RPROC(CreateVertexArray)>(ret->mId);
return ret.forget();
}
// -
static bool ValidateOrSkipForDelete(const ClientWebGLContext& context,
const webgl::ObjectJS* const obj) {
if (!obj) return false;
if (!obj->ValidateForContext(context, "obj")) return false;
if (obj->IsDeleted()) return false;
return true;
}
void ClientWebGLContext::DeleteBuffer(WebGLBufferJS* const obj) {
const FuncScope funcScope(*this, "deleteBuffer");
if (IsContextLost()) return;
if (!ValidateOrSkipForDelete(*this, obj)) return;
auto& state = State();
// Unbind from all bind points and bound containers
// UBOs
for (const auto i : IntegerRange(state.mBoundUbos.size())) {
if (state.mBoundUbos[i] == obj) {
BindBufferBase(LOCAL_GL_UNIFORM_BUFFER, i, nullptr);
}
}
// TFO only if not active
if (!state.mBoundTfo->mActiveOrPaused) {
const auto& buffers = state.mBoundTfo->mAttribBuffers;
for (const auto i : IntegerRange(buffers.size())) {
if (buffers[i] == obj) {
BindBufferBase(LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER, i, nullptr);
}
}
}
// Generic/global bind points
for (const auto& pair : state.mBoundBufferByTarget) {
if (pair.second == obj) {
BindBuffer(pair.first, nullptr);
}
}
// VAO attachments
if (state.mBoundVao->mIndexBuffer == obj) {
BindBuffer(LOCAL_GL_ELEMENT_ARRAY_BUFFER, nullptr);
}
const auto& vaoBuffers = state.mBoundVao->mAttribBuffers;
Maybe<WebGLBufferJS*> toRestore;
for (const auto i : IntegerRange(vaoBuffers.size())) {
if (vaoBuffers[i] == obj) {
if (!toRestore) {
toRestore =
Some(state.mBoundBufferByTarget[LOCAL_GL_ARRAY_BUFFER].get());
if (*toRestore) {
BindBuffer(LOCAL_GL_ARRAY_BUFFER, nullptr);
}
}
VertexAttribPointer(i, 4, LOCAL_GL_FLOAT, false, 0, 0);
}
}
if (toRestore && *toRestore) {
BindBuffer(LOCAL_GL_ARRAY_BUFFER, *toRestore);
}
// -
obj->mDeleteRequested = true;
Run<RPROC(DeleteBuffer)>(obj->mId);
}
void ClientWebGLContext::DeleteFramebuffer(WebGLFramebufferJS* const obj,
bool canDeleteOpaque) {
const FuncScope funcScope(*this, "deleteFramebuffer");
if (IsContextLost()) return;
if (!ValidateOrSkipForDelete(*this, obj)) return;
if (!canDeleteOpaque && obj->mOpaque) {
EnqueueError(
LOCAL_GL_INVALID_OPERATION,
"An opaque framebuffer's attachments cannot be inspected or changed.");
return;
}
const auto& state = State();
// Unbind
const auto fnDetach = [&](const GLenum target,
const WebGLFramebufferJS* const fb) {
if (obj == fb) {
BindFramebuffer(target, nullptr);
}
};
if (state.mBoundDrawFb == state.mBoundReadFb) {
fnDetach(LOCAL_GL_FRAMEBUFFER, state.mBoundDrawFb.get());
} else {
fnDetach(LOCAL_GL_DRAW_FRAMEBUFFER, state.mBoundDrawFb.get());
fnDetach(LOCAL_GL_READ_FRAMEBUFFER, state.mBoundReadFb.get());
}
obj->mDeleteRequested = true;
Run<RPROC(DeleteFramebuffer)>(obj->mId);
}
void ClientWebGLContext::DeleteProgram(WebGLProgramJS* const obj) const {
const FuncScope funcScope(*this, "deleteProgram");
if (IsContextLost()) return;
if (!ValidateOrSkipForDelete(*this, obj)) return;
// Don't unbind
obj->mKeepAlive = nullptr;
}
webgl::ProgramKeepAlive::~ProgramKeepAlive() {
if (!mParent) return;
const auto& context = mParent->Context();
if (!context) return;
context->DoDeleteProgram(*mParent);
}
void ClientWebGLContext::DoDeleteProgram(WebGLProgramJS& obj) const {
obj.mNextLink_Shaders = {};
Run<RPROC(DeleteProgram)>(obj.mId);
}
static GLenum QuerySlotTarget(const GLenum specificTarget);
void ClientWebGLContext::DeleteQuery(WebGLQueryJS* const obj) {
const FuncScope funcScope(*this, "deleteQuery");
if (IsContextLost()) return;
if (!ValidateOrSkipForDelete(*this, obj)) return;
const auto& state = State();
// Unbind if current
if (obj->mTarget) {
// Despite mTarget being set, we may not have called BeginQuery on this
// object. QueryCounter may also set mTarget.
const auto slotTarget = QuerySlotTarget(obj->mTarget);
const auto curForTarget =
MaybeFind(state.mCurrentQueryByTarget, slotTarget);
if (curForTarget && *curForTarget == obj) {
EndQuery(obj->mTarget);
}
}
obj->mDeleteRequested = true;
Run<RPROC(DeleteQuery)>(obj->mId);
}
void ClientWebGLContext::DeleteRenderbuffer(WebGLRenderbufferJS* const obj) {
const FuncScope funcScope(*this, "deleteRenderbuffer");
if (IsContextLost()) return;
if (!ValidateOrSkipForDelete(*this, obj)) return;
const auto& state = State();
// Unbind
if (state.mBoundRb == obj) {
BindRenderbuffer(LOCAL_GL_RENDERBUFFER, nullptr);
}
// Unbind from bound FBs
const auto fnDetach = [&](const GLenum target,
const WebGLFramebufferJS* const fb) {
if (!fb) return;
for (const auto& pair : fb->mAttachments) {
if (pair.second.rb == obj) {
FramebufferRenderbuffer(target, pair.first, LOCAL_GL_RENDERBUFFER,
nullptr);
}
}
};
if (state.mBoundDrawFb == state.mBoundReadFb) {
fnDetach(LOCAL_GL_FRAMEBUFFER, state.mBoundDrawFb.get());
} else {
fnDetach(LOCAL_GL_DRAW_FRAMEBUFFER, state.mBoundDrawFb.get());
fnDetach(LOCAL_GL_READ_FRAMEBUFFER, state.mBoundReadFb.get());
}
obj->mDeleteRequested = true;
Run<RPROC(DeleteRenderbuffer)>(obj->mId);
}
void ClientWebGLContext::DeleteSampler(WebGLSamplerJS* const obj) {
const FuncScope funcScope(*this, "deleteSampler");
if (IsContextLost()) return;
if (!ValidateOrSkipForDelete(*this, obj)) return;
const auto& state = State();
// Unbind
for (const auto i : IntegerRange(state.mTexUnits.size())) {
if (state.mTexUnits[i].sampler == obj) {
BindSampler(i, nullptr);
}
}
obj->mDeleteRequested = true;
Run<RPROC(DeleteSampler)>(obj->mId);
}
void ClientWebGLContext::DeleteShader(WebGLShaderJS* const obj) const {
const FuncScope funcScope(*this, "deleteShader");
if (IsContextLost()) return;
if (!ValidateOrSkipForDelete(*this, obj)) return;
// Don't unbind
obj->mKeepAlive = nullptr;
}
webgl::ShaderKeepAlive::~ShaderKeepAlive() {
if (!mParent) return;
const auto& context = mParent->Context();
if (!context) return;
context->DoDeleteShader(*mParent);
}
void ClientWebGLContext::DoDeleteShader(const WebGLShaderJS& obj) const {
Run<RPROC(DeleteShader)>(obj.mId);
}
void ClientWebGLContext::DeleteSync(WebGLSyncJS* const obj) const {
const FuncScope funcScope(*this, "deleteSync");
if (IsContextLost()) return;
if (!ValidateOrSkipForDelete(*this, obj)) return;
// Nothing to unbind
obj->mDeleteRequested = true;
Run<RPROC(DeleteSync)>(obj->mId);
}
void ClientWebGLContext::DeleteTexture(WebGLTextureJS* const obj) {
const FuncScope funcScope(*this, "deleteTexture");
if (IsContextLost()) return;
if (!ValidateOrSkipForDelete(*this, obj)) return;
auto& state = State();
// Unbind
const auto& target = obj->mTarget;
if (target) {
// Unbind from tex units
Maybe<uint32_t> restoreTexUnit;
for (const auto i : IntegerRange(state.mTexUnits.size())) {
if (state.mTexUnits[i].texByTarget[target] == obj) {
if (!restoreTexUnit) {
restoreTexUnit = Some(state.mActiveTexUnit);
}
ActiveTexture(LOCAL_GL_TEXTURE0 + i);
BindTexture(target, nullptr);
}
}
if (restoreTexUnit) {
ActiveTexture(LOCAL_GL_TEXTURE0 + *restoreTexUnit);
}
// Unbind from bound FBs
const auto fnDetach = [&](const GLenum target,
const WebGLFramebufferJS* const fb) {
if (!fb) return;
for (const auto& pair : fb->mAttachments) {
if (pair.second.tex == obj) {
FramebufferRenderbuffer(target, pair.first, LOCAL_GL_RENDERBUFFER,
nullptr);
}
}
};
if (state.mBoundDrawFb == state.mBoundReadFb) {
fnDetach(LOCAL_GL_FRAMEBUFFER, state.mBoundDrawFb.get());
} else {
fnDetach(LOCAL_GL_DRAW_FRAMEBUFFER, state.mBoundDrawFb.get());
fnDetach(LOCAL_GL_READ_FRAMEBUFFER, state.mBoundReadFb.get());
}
}
obj->mDeleteRequested = true;
Run<RPROC(DeleteTexture)>(obj->mId);
}
void ClientWebGLContext::DeleteTransformFeedback(
WebGLTransformFeedbackJS* const obj) {
const FuncScope funcScope(*this, "deleteTransformFeedback");
if (IsContextLost()) return;
if (!ValidateOrSkipForDelete(*this, obj)) return;
const auto& state = State();
if (obj->mActiveOrPaused) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Transform Feedback object still active or paused.");
return;
}
// Unbind
if (state.mBoundTfo == obj) {
BindTransformFeedback(LOCAL_GL_TRANSFORM_FEEDBACK, nullptr);
}
obj->mDeleteRequested = true;
Run<RPROC(DeleteTransformFeedback)>(obj->mId);
}
void ClientWebGLContext::DeleteVertexArray(WebGLVertexArrayJS* const obj) {
const FuncScope funcScope(*this, "deleteVertexArray");
if (IsContextLost()) return;
if (!ValidateOrSkipForDelete(*this, obj)) return;
const auto& state = State();
// Unbind
if (state.mBoundVao == obj) {
BindVertexArray(nullptr);
}
obj->mDeleteRequested = true;
Run<RPROC(DeleteVertexArray)>(obj->mId);
}
// -
bool ClientWebGLContext::IsBuffer(const WebGLBufferJS* const obj) const {
const FuncScope funcScope(*this, "isBuffer");
if (IsContextLost()) return false;
return obj && obj->IsUsable(*this) &&
obj->mKind != webgl::BufferKind::Undefined;
}
bool ClientWebGLContext::IsFramebuffer(
const WebGLFramebufferJS* const obj) const {
const FuncScope funcScope(*this, "isFramebuffer");
if (IsContextLost()) return false;
return obj && obj->IsUsable(*this) && obj->mHasBeenBound;
}
bool ClientWebGLContext::IsProgram(const WebGLProgramJS* const obj) const {
const FuncScope funcScope(*this, "isProgram");
if (IsContextLost()) return false;
return obj && obj->IsUsable(*this);
}
bool ClientWebGLContext::IsQuery(const WebGLQueryJS* const obj) const {
const FuncScope funcScope(*this, "isQuery");
if (IsContextLost()) return false;
return obj && obj->IsUsable(*this) && obj->mTarget;
}
bool ClientWebGLContext::IsRenderbuffer(
const WebGLRenderbufferJS* const obj) const {
const FuncScope funcScope(*this, "isRenderbuffer");
if (IsContextLost()) return false;
return obj && obj->IsUsable(*this) && obj->mHasBeenBound;
}
bool ClientWebGLContext::IsSampler(const WebGLSamplerJS* const obj) const {
const FuncScope funcScope(*this, "isSampler");
if (IsContextLost()) return false;
return obj && obj->IsUsable(*this);
}
bool ClientWebGLContext::IsShader(const WebGLShaderJS* const obj) const {
const FuncScope funcScope(*this, "isShader");
if (IsContextLost()) return false;
return obj && obj->IsUsable(*this);
}
bool ClientWebGLContext::IsSync(const WebGLSyncJS* const obj) const {
const FuncScope funcScope(*this, "isSync");
if (IsContextLost()) return false;
return obj && obj->IsUsable(*this);
}
bool ClientWebGLContext::IsTexture(const WebGLTextureJS* const obj) const {
const FuncScope funcScope(*this, "isTexture");
if (IsContextLost()) return false;
return obj && obj->IsUsable(*this) && obj->mTarget;
}
bool ClientWebGLContext::IsTransformFeedback(
const WebGLTransformFeedbackJS* const obj) const {
const FuncScope funcScope(*this, "isTransformFeedback");
if (IsContextLost()) return false;
return obj && obj->IsUsable(*this) && obj->mHasBeenBound;
}
bool ClientWebGLContext::IsVertexArray(
const WebGLVertexArrayJS* const obj) const {
const FuncScope funcScope(*this, "isVertexArray");
if (IsContextLost()) return false;
return obj && obj->IsUsable(*this) && obj->mHasBeenBound;
}
// ------------------------- GL State -------------------------
void ClientWebGLContext::SetEnabledI(const GLenum cap, const Maybe<GLuint> i,
const bool val) const {
const FuncScope funcScope(*this, "enable/disable");
if (IsContextLost()) return;
auto& map = *mNotLost->state.mIsEnabledMap;
auto slot = MaybeFind(map, cap);
if (i && cap != LOCAL_GL_BLEND) {
slot = nullptr;
}
if (!slot) {
EnqueueError_ArgEnum("cap", cap);
return;
}
Run<RPROC(SetEnabled)>(cap, i, val);
if (!i || *i == 0) {
*slot = val;
}
}
bool ClientWebGLContext::IsEnabled(const GLenum cap) const {
const FuncScope funcScope(*this, "isEnabled");
if (IsContextLost()) return false;
const auto& map = *mNotLost->state.mIsEnabledMap;
const auto slot = MaybeFind(map, cap);
if (!slot) {
EnqueueError_ArgEnum("cap", cap);
return false;
}
return *slot;
}
template <typename T, typename S>
static JS::Value Create(JSContext* cx, nsWrapperCache* creator, const S& src,
ErrorResult& rv) {
return JS::ObjectOrNullValue(T::Create(cx, creator, src, rv));
}
void ClientWebGLContext::GetInternalformatParameter(
JSContext* cx, GLenum target, GLenum internalformat, GLenum pname,
JS::MutableHandle<JS::Value> retval, ErrorResult& rv) {
const FuncScope funcScope(*this, "getInternalformatParameter");
retval.set(JS::NullValue());
const auto notLost =
mNotLost; // Hold a strong-ref to prevent LoseContext=>UAF.
if (IsContextLost()) return;
const auto& inProcessContext = notLost->inProcess;
Maybe<std::vector<int32_t>> maybe;
if (inProcessContext) {
maybe = inProcessContext->GetInternalformatParameter(target, internalformat,
pname);
} else {
const auto& child = notLost->outOfProcess;
child->FlushPendingCmds();
if (!child->SendGetInternalformatParameter(target, internalformat, pname,
&maybe)) {
return;
}
}
if (!maybe) {
return;
}
retval.set(Create<dom::Int32Array>(cx, this, *maybe, rv));
}
static JS::Value StringValue(JSContext* cx, const std::string& str,
ErrorResult& er) {
JSString* jsStr = JS_NewStringCopyN(cx, str.data(), str.size());
if (!jsStr) {
er.Throw(NS_ERROR_OUT_OF_MEMORY);
return JS::NullValue();
}
return JS::StringValue(jsStr);
}
template <typename T>
bool ToJSValueOrNull(JSContext* const cx, const RefPtr<T>& ptr,
JS::MutableHandle<JS::Value> retval) {
if (!ptr) {
retval.set(JS::NullValue());
return true;
}
return dom::ToJSValue(cx, ptr, retval);
}
Maybe<double> ClientWebGLContext::GetNumber(const GLenum pname) {
MOZ_ASSERT(!IsContextLost());
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetNumber(pname);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
Maybe<double> ret;
if (!child->SendGetNumber(pname, &ret)) {
ret.reset();
}
return ret;
}
Maybe<std::string> ClientWebGLContext::GetString(const GLenum pname) {
MOZ_ASSERT(!IsContextLost());
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetString(pname);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
Maybe<std::string> ret;
if (!child->SendGetString(pname, &ret)) {
ret.reset();
}
return ret;
}
void ClientWebGLContext::GetParameter(JSContext* cx, GLenum pname,
JS::MutableHandle<JS::Value> retval,
ErrorResult& rv, const bool debug) {
retval.set(JS::NullValue());
const FuncScope funcScope(*this, "getParameter");
if (IsContextLost()) return;
const auto& limits = Limits();
const auto& state = State();
// -
const auto fnSetRetval_Buffer = [&](const GLenum target) {
const auto buffer = *MaybeFind(state.mBoundBufferByTarget, target);
(void)ToJSValueOrNull(cx, buffer, retval);
};
const auto fnSetRetval_Tex = [&](const GLenum texTarget) {
const auto& texUnit = state.mTexUnits[state.mActiveTexUnit];
const auto tex = Find(texUnit.texByTarget, texTarget, nullptr);
(void)ToJSValueOrNull(cx, tex, retval);
};
switch (pname) {
case LOCAL_GL_ARRAY_BUFFER_BINDING:
fnSetRetval_Buffer(LOCAL_GL_ARRAY_BUFFER);
return;
case LOCAL_GL_CURRENT_PROGRAM:
(void)ToJSValueOrNull(cx, state.mCurrentProgram, retval);
return;
case LOCAL_GL_ELEMENT_ARRAY_BUFFER_BINDING:
(void)ToJSValueOrNull(cx, state.mBoundVao->mIndexBuffer, retval);
return;
case LOCAL_GL_FRAMEBUFFER_BINDING:
(void)ToJSValueOrNull(cx, state.mBoundDrawFb, retval);
return;
case LOCAL_GL_RENDERBUFFER_BINDING:
(void)ToJSValueOrNull(cx, state.mBoundRb, retval);
return;
case LOCAL_GL_TEXTURE_BINDING_2D:
fnSetRetval_Tex(LOCAL_GL_TEXTURE_2D);
return;
case LOCAL_GL_TEXTURE_BINDING_CUBE_MAP:
fnSetRetval_Tex(LOCAL_GL_TEXTURE_CUBE_MAP);
return;
case LOCAL_GL_VERTEX_ARRAY_BINDING: {
if (!mIsWebGL2 &&
!IsExtensionEnabled(WebGLExtensionID::OES_vertex_array_object))
break;
auto ret = state.mBoundVao;
if (ret == state.mDefaultVao) {
ret = nullptr;
}
(void)ToJSValueOrNull(cx, ret, retval);
return;
}
case LOCAL_GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
retval.set(JS::NumberValue(limits.maxTexUnits));
return;
case LOCAL_GL_MAX_TEXTURE_SIZE:
retval.set(JS::NumberValue(limits.maxTex2dSize));
return;
case LOCAL_GL_MAX_CUBE_MAP_TEXTURE_SIZE:
retval.set(JS::NumberValue(limits.maxTexCubeSize));
return;
case LOCAL_GL_MAX_VERTEX_ATTRIBS:
retval.set(JS::NumberValue(limits.maxVertexAttribs));
return;
case LOCAL_GL_MAX_VIEWS_OVR:
if (IsExtensionEnabled(WebGLExtensionID::OVR_multiview2)) {
retval.set(JS::NumberValue(limits.maxMultiviewLayers));
return;
}
break;
case LOCAL_GL_PACK_ALIGNMENT:
retval.set(JS::NumberValue(state.mPixelPackState.alignmentInTypeElems));
return;
case LOCAL_GL_UNPACK_ALIGNMENT:
retval.set(JS::NumberValue(state.mPixelUnpackState.alignmentInTypeElems));
return;
case dom::WebGLRenderingContext_Binding::UNPACK_FLIP_Y_WEBGL:
retval.set(JS::BooleanValue(state.mPixelUnpackState.flipY));
return;
case dom::WebGLRenderingContext_Binding::UNPACK_PREMULTIPLY_ALPHA_WEBGL:
retval.set(JS::BooleanValue(state.mPixelUnpackState.premultiplyAlpha));
return;
case dom::WebGLRenderingContext_Binding::UNPACK_COLORSPACE_CONVERSION_WEBGL:
retval.set(JS::NumberValue(state.mPixelUnpackState.colorspaceConversion));
return;
case dom::WEBGL_provoking_vertex_Binding::PROVOKING_VERTEX_WEBGL:
if (!IsExtensionEnabled(WebGLExtensionID::WEBGL_provoking_vertex)) break;
retval.set(JS::NumberValue(UnderlyingValue(state.mProvokingVertex)));
return;
// -
// Array returns
// 2 floats
case LOCAL_GL_DEPTH_RANGE:
retval.set(Create<dom::Float32Array>(cx, this, state.mDepthRange, rv));
return;
case LOCAL_GL_ALIASED_POINT_SIZE_RANGE:
retval.set(
Create<dom::Float32Array>(cx, this, limits.pointSizeRange, rv));
return;
case LOCAL_GL_ALIASED_LINE_WIDTH_RANGE:
retval.set(
Create<dom::Float32Array>(cx, this, limits.lineWidthRange, rv));
return;
// 4 floats
case LOCAL_GL_COLOR_CLEAR_VALUE:
retval.set(Create<dom::Float32Array>(cx, this, state.mClearColor, rv));
return;
case LOCAL_GL_BLEND_COLOR:
retval.set(Create<dom::Float32Array>(cx, this, state.mBlendColor, rv));
return;
// 2 ints
case LOCAL_GL_MAX_VIEWPORT_DIMS: {
auto maxViewportDim = BitwiseCast<int32_t>(limits.maxViewportDim);
const auto dims = std::array<int32_t, 2>{maxViewportDim, maxViewportDim};
retval.set(Create<dom::Int32Array>(cx, this, dims, rv));
return;
}
// 4 ints
case LOCAL_GL_SCISSOR_BOX:
retval.set(Create<dom::Int32Array>(cx, this, state.mScissor, rv));
return;
case LOCAL_GL_VIEWPORT:
retval.set(Create<dom::Int32Array>(cx, this, state.mViewport, rv));
return;
// any
case LOCAL_GL_COMPRESSED_TEXTURE_FORMATS:
retval.set(Create<dom::Uint32Array>(cx, this,
state.mCompressedTextureFormats, rv));
return;
}
if (mIsWebGL2) {
switch (pname) {
case LOCAL_GL_COPY_READ_BUFFER_BINDING:
fnSetRetval_Buffer(LOCAL_GL_COPY_READ_BUFFER);
return;
case LOCAL_GL_COPY_WRITE_BUFFER_BINDING:
fnSetRetval_Buffer(LOCAL_GL_COPY_WRITE_BUFFER);
return;
case LOCAL_GL_DRAW_FRAMEBUFFER_BINDING:
(void)ToJSValueOrNull(cx, state.mBoundDrawFb, retval);
return;
case LOCAL_GL_MAX_CLIENT_WAIT_TIMEOUT_WEBGL:
retval.set(JS::NumberValue(webgl::kMaxClientWaitSyncTimeoutNS));
return;
case LOCAL_GL_PIXEL_PACK_BUFFER_BINDING:
fnSetRetval_Buffer(LOCAL_GL_PIXEL_PACK_BUFFER);
return;
case LOCAL_GL_PIXEL_UNPACK_BUFFER_BINDING:
fnSetRetval_Buffer(LOCAL_GL_PIXEL_UNPACK_BUFFER);
return;
case LOCAL_GL_READ_FRAMEBUFFER_BINDING:
(void)ToJSValueOrNull(cx, state.mBoundReadFb, retval);
return;
case LOCAL_GL_SAMPLER_BINDING: {
const auto& texUnit = state.mTexUnits[state.mActiveTexUnit];
(void)ToJSValueOrNull(cx, texUnit.sampler, retval);
return;
}
case LOCAL_GL_TEXTURE_BINDING_2D_ARRAY:
fnSetRetval_Tex(LOCAL_GL_TEXTURE_2D_ARRAY);
return;
case LOCAL_GL_TEXTURE_BINDING_3D:
fnSetRetval_Tex(LOCAL_GL_TEXTURE_3D);
return;
case LOCAL_GL_TRANSFORM_FEEDBACK_BINDING: {
auto ret = state.mBoundTfo;
if (ret == state.mDefaultTfo) {
ret = nullptr;
}
(void)ToJSValueOrNull(cx, ret, retval);
return;
}
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
fnSetRetval_Buffer(LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER);
return;
case LOCAL_GL_UNIFORM_BUFFER_BINDING:
fnSetRetval_Buffer(LOCAL_GL_UNIFORM_BUFFER);
return;
case LOCAL_GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS:
retval.set(
JS::NumberValue(webgl::kMaxTransformFeedbackSeparateAttribs));
return;
case LOCAL_GL_MAX_UNIFORM_BUFFER_BINDINGS:
retval.set(JS::NumberValue(limits.maxUniformBufferBindings));
return;
case LOCAL_GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT:
retval.set(JS::NumberValue(limits.uniformBufferOffsetAlignment));
return;
case LOCAL_GL_MAX_3D_TEXTURE_SIZE:
retval.set(JS::NumberValue(limits.maxTex3dSize));
return;
case LOCAL_GL_MAX_ARRAY_TEXTURE_LAYERS:
retval.set(JS::NumberValue(limits.maxTexArrayLayers));
return;
case LOCAL_GL_PACK_ROW_LENGTH:
retval.set(JS::NumberValue(state.mPixelPackState.rowLength));
return;
case LOCAL_GL_PACK_SKIP_PIXELS:
retval.set(JS::NumberValue(state.mPixelPackState.skipPixels));
return;
case LOCAL_GL_PACK_SKIP_ROWS:
retval.set(JS::NumberValue(state.mPixelPackState.skipRows));
return;
case LOCAL_GL_UNPACK_IMAGE_HEIGHT:
retval.set(JS::NumberValue(state.mPixelUnpackState.imageHeight));
return;
case LOCAL_GL_UNPACK_ROW_LENGTH:
retval.set(JS::NumberValue(state.mPixelUnpackState.rowLength));
return;
case LOCAL_GL_UNPACK_SKIP_IMAGES:
retval.set(JS::NumberValue(state.mPixelUnpackState.skipImages));
return;
case LOCAL_GL_UNPACK_SKIP_PIXELS:
retval.set(JS::NumberValue(state.mPixelUnpackState.skipPixels));
return;
case LOCAL_GL_UNPACK_SKIP_ROWS:
retval.set(JS::NumberValue(state.mPixelUnpackState.skipRows));
return;
} // switch pname
} // if webgl2
// -
if (!debug) {
const auto GetUnmaskedRenderer = [&]() {
const auto prefLock = StaticPrefs::webgl_override_unmasked_renderer();
if (!prefLock->IsEmpty()) {
return Some(ToString(*prefLock));
}
return GetString(LOCAL_GL_RENDERER);
};
const auto GetUnmaskedVendor = [&]() {
const auto prefLock = StaticPrefs::webgl_override_unmasked_vendor();
if (!prefLock->IsEmpty()) {
return Some(ToString(*prefLock));
}
return GetString(LOCAL_GL_VENDOR);
};
// -
Maybe<std::string> ret;
switch (pname) {
case LOCAL_GL_VENDOR:
ret = Some(std::string{"Mozilla"});
break;
case LOCAL_GL_RENDERER: {
bool allowRenderer = StaticPrefs::webgl_enable_renderer_query();
if (ShouldResistFingerprinting(RFPTarget::WebGLRenderInfo)) {
allowRenderer = false;
}
if (allowRenderer) {
ret = GetUnmaskedRenderer();
if (ret) {
ret = Some(webgl::SanitizeRenderer(*ret));
}
}
if (!ret) {
ret = Some(std::string{"Mozilla"});
}
break;
}
case LOCAL_GL_VERSION:
if (mIsWebGL2) {
ret = Some(std::string{"WebGL 2.0"});
} else {
ret = Some(std::string{"WebGL 1.0"});
}
break;
case LOCAL_GL_SHADING_LANGUAGE_VERSION:
if (mIsWebGL2) {
ret = Some(std::string{"WebGL GLSL ES 3.00"});
} else {
ret = Some(std::string{"WebGL GLSL ES 1.0"});
}
break;
case dom::WEBGL_debug_renderer_info_Binding::UNMASKED_VENDOR_WEBGL:
case dom::WEBGL_debug_renderer_info_Binding::UNMASKED_RENDERER_WEBGL: {
if (!IsExtensionEnabled(WebGLExtensionID::WEBGL_debug_renderer_info)) {
EnqueueError_ArgEnum("pname", pname);
return;
}
switch (pname) {
case dom::WEBGL_debug_renderer_info_Binding::UNMASKED_RENDERER_WEBGL:
ret = GetUnmaskedRenderer();
if (ret && StaticPrefs::webgl_sanitize_unmasked_renderer()) {
*ret = webgl::SanitizeRenderer(*ret);
}
break;
case dom::WEBGL_debug_renderer_info_Binding::UNMASKED_VENDOR_WEBGL:
ret = GetUnmaskedVendor();
break;
default:
MOZ_CRASH();
}
break;
}
default:
break;
}
if (ret) {
retval.set(StringValue(cx, *ret, rv));
return;
}
} // if (!debug)
// -
bool debugOnly = false;
bool asString = false;
switch (pname) {
case LOCAL_GL_EXTENSIONS:
case LOCAL_GL_RENDERER:
case LOCAL_GL_VENDOR:
case LOCAL_GL_VERSION:
case dom::MOZ_debug_Binding::WSI_INFO:
debugOnly = true;
asString = true;
break;
case dom::MOZ_debug_Binding::DOES_INDEX_VALIDATION:
debugOnly = true;
break;
default:
break;
}
if (debugOnly && !debug) {
EnqueueError_ArgEnum("pname", pname);
return;
}
// -
if (asString) {
const auto maybe = GetString(pname);
if (maybe) {
auto str = std::string{};
if (pname == dom::MOZ_debug_Binding::WSI_INFO) {
const auto& outOfProcess = mNotLost->outOfProcess;
const auto& inProcess = mNotLost->inProcess;
str += PrintfStdString("outOfProcess: %s\ninProcess: %s\n",
ToChars(bool(outOfProcess)),
ToChars(bool(inProcess)));
}
str += *maybe;
retval.set(StringValue(cx, str.c_str(), rv));
}
} else {
const auto maybe = GetNumber(pname);
if (maybe) {
switch (pname) {
// WebGL 1:
case LOCAL_GL_BLEND:
case LOCAL_GL_CULL_FACE:
case LOCAL_GL_DEPTH_TEST:
case LOCAL_GL_DEPTH_WRITEMASK:
case LOCAL_GL_DITHER:
case LOCAL_GL_POLYGON_OFFSET_FILL:
case LOCAL_GL_SAMPLE_ALPHA_TO_COVERAGE:
case LOCAL_GL_SAMPLE_COVERAGE:
case LOCAL_GL_SAMPLE_COVERAGE_INVERT:
case LOCAL_GL_SCISSOR_TEST:
case LOCAL_GL_STENCIL_TEST:
// WebGL 2:
case LOCAL_GL_RASTERIZER_DISCARD:
case LOCAL_GL_TRANSFORM_FEEDBACK_ACTIVE:
case LOCAL_GL_TRANSFORM_FEEDBACK_PAUSED:
retval.set(JS::BooleanValue(*maybe));
break;
// 4 bools
case LOCAL_GL_COLOR_WRITEMASK: {
const auto mask = uint8_t(*maybe);
const auto bs = std::bitset<4>(mask);
const auto src = std::array<bool, 4>{bs[0], bs[1], bs[2], bs[3]};
JS::Rooted<JS::Value> arr(cx);
if (!dom::ToJSValue(cx, src.data(), src.size(), &arr)) {
rv = NS_ERROR_OUT_OF_MEMORY;
}
retval.set(arr);
return;
}
default:
retval.set(JS::NumberValue(*maybe));
break;
}
}
}
}
void ClientWebGLContext::GetBufferParameter(
JSContext* cx, GLenum target, GLenum pname,
JS::MutableHandle<JS::Value> retval) const {
retval.set(JS::NullValue());
if (IsContextLost()) return;
const auto maybe = [&]() {
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetBufferParameter(target, pname);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
Maybe<double> ret;
if (!child->SendGetBufferParameter(target, pname, &ret)) {
ret.reset();
}
return ret;
}();
if (maybe) {
retval.set(JS::NumberValue(*maybe));
}
}
bool IsFramebufferTarget(const bool isWebgl2, const GLenum target) {
switch (target) {
case LOCAL_GL_FRAMEBUFFER:
return true;
case LOCAL_GL_DRAW_FRAMEBUFFER:
case LOCAL_GL_READ_FRAMEBUFFER:
return isWebgl2;
default:
return false;
}
}
void ClientWebGLContext::GetFramebufferAttachmentParameter(
JSContext* const cx, const GLenum target, const GLenum attachment,
const GLenum pname, JS::MutableHandle<JS::Value> retval,
ErrorResult& rv) const {
retval.set(JS::NullValue());
const FuncScope funcScope(*this, "getFramebufferAttachmentParameter");
if (IsContextLost()) return;
const auto& state = State();
if (!IsFramebufferTarget(mIsWebGL2, target)) {
EnqueueError_ArgEnum("target", target);
return;
}
auto fb = state.mBoundDrawFb;
if (target == LOCAL_GL_READ_FRAMEBUFFER) {
fb = state.mBoundReadFb;
}
const auto fnGet = [&](const GLenum pname) {
const auto fbId = fb ? fb->mId : 0;
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetFramebufferAttachmentParameter(fbId, attachment,
pname);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
Maybe<double> ret;
if (!child->SendGetFramebufferAttachmentParameter(fbId, attachment, pname,
&ret)) {
ret.reset();
}
return ret;
};
if (fb) {
if (fb->mOpaque) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"An opaque framebuffer's attachments cannot be inspected or "
"changed.");
return;
}
auto attachmentSlotEnum = attachment;
if (mIsWebGL2 && attachment == LOCAL_GL_DEPTH_STENCIL_ATTACHMENT) {
// In webgl2, DEPTH_STENCIL is valid iff the DEPTH and STENCIL images
// match, so check if the server errors.
const auto maybe = fnGet(LOCAL_GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE);
if (!maybe) return;
attachmentSlotEnum = LOCAL_GL_DEPTH_ATTACHMENT;
}
const auto maybeSlot = fb->GetAttachment(attachmentSlotEnum);
if (!maybeSlot) {
EnqueueError_ArgEnum("attachment", attachment);
return;
}
const auto& attached = *maybeSlot;
// -
if (pname == LOCAL_GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME) {
if (attached.rb) {
(void)ToJSValueOrNull(cx, attached.rb, retval);
} else {
if (!mIsWebGL2 && !attached.tex) {
EnqueueError_ArgEnum("pname", pname);
return;
}
(void)ToJSValueOrNull(cx, attached.tex, retval);
}
return;
}
}
const auto maybe = fnGet(pname);
if (maybe) {
retval.set(JS::NumberValue(*maybe));
}
}
void ClientWebGLContext::GetRenderbufferParameter(
JSContext* cx, GLenum target, GLenum pname,
JS::MutableHandle<JS::Value> retval) const {
retval.set(JS::NullValue());
const FuncScope funcScope(*this, "getRenderbufferParameter");
if (IsContextLost()) return;
if (target != LOCAL_GL_RENDERBUFFER) {
EnqueueError_ArgEnum("target", target);
return;
}
const auto& state = State();
const auto& rb = state.mBoundRb;
const auto rbId = rb ? rb->mId : 0;
const auto maybe = [&]() {
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetRenderbufferParameter(rbId, pname);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
Maybe<double> ret;
if (!child->SendGetRenderbufferParameter(rbId, pname, &ret)) {
ret.reset();
}
return ret;
}();
if (maybe) {
retval.set(JS::NumberValue(*maybe));
}
}
void ClientWebGLContext::GetIndexedParameter(
JSContext* cx, GLenum target, GLuint index,
JS::MutableHandle<JS::Value> retval, ErrorResult& rv) const {
retval.set(JS::NullValue());
const FuncScope funcScope(*this, "getIndexedParameter");
if (IsContextLost()) return;
const auto& state = State();
switch (target) {
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_BINDING: {
const auto& list = state.mBoundTfo->mAttribBuffers;
if (index >= list.size()) {
EnqueueError(LOCAL_GL_INVALID_VALUE,
"`index` (%u) >= MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS",
index);
return;
}
(void)ToJSValueOrNull(cx, list[index], retval);
return;
}
case LOCAL_GL_UNIFORM_BUFFER_BINDING: {
const auto& list = state.mBoundUbos;
if (index >= list.size()) {
EnqueueError(LOCAL_GL_INVALID_VALUE,
"`index` (%u) >= MAX_UNIFORM_BUFFER_BINDINGS", index);
return;
}
(void)ToJSValueOrNull(cx, list[index], retval);
return;
}
}
const auto maybe = [&]() {
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetIndexedParameter(target, index);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
Maybe<double> ret;
if (!child->SendGetIndexedParameter(target, index, &ret)) {
ret.reset();
}
return ret;
}();
if (maybe) {
switch (target) {
case LOCAL_GL_COLOR_WRITEMASK: {
const auto bs = std::bitset<4>(*maybe);
const auto src = std::array<bool, 4>{bs[0], bs[1], bs[2], bs[3]};
JS::Rooted<JS::Value> arr(cx);
if (!dom::ToJSValue(cx, src.data(), src.size(), &arr)) {
rv = NS_ERROR_OUT_OF_MEMORY;
}
retval.set(arr);
return;
}
default:
retval.set(JS::NumberValue(*maybe));
return;
}
}
}
void ClientWebGLContext::GetUniform(JSContext* const cx,
const WebGLProgramJS& prog,
const WebGLUniformLocationJS& loc,
JS::MutableHandle<JS::Value> retval) {
retval.set(JS::NullValue());
const FuncScope funcScope(*this, "getUniform");
if (IsContextLost()) return;
if (!prog.ValidateUsable(*this, "prog")) return;
if (!loc.ValidateUsable(*this, "loc")) return;
const auto& progLinkResult = GetLinkResult(prog);
if (!progLinkResult.success) {
EnqueueError(LOCAL_GL_INVALID_OPERATION, "Program is not linked.");
return;
}
const auto& uniformLinkResult = loc.mParent.lock();
if (uniformLinkResult.get() != &progLinkResult) {
EnqueueError(
LOCAL_GL_INVALID_OPERATION,
"UniformLocation is not from the most recent linking of Program.");
return;
}
const auto res = [&]() {
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetUniform(prog.mId, loc.mLocation);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
webgl::GetUniformData ret;
if (!child->SendGetUniform(prog.mId, loc.mLocation, &ret)) {
ret = {};
}
return ret;
}();
if (!res.type) return;
const auto elemCount = ElemTypeComponents(res.type);
MOZ_ASSERT(elemCount);
switch (res.type) {
case LOCAL_GL_BOOL:
retval.set(JS::BooleanValue(res.data[0]));
return;
case LOCAL_GL_FLOAT: {
const auto ptr = reinterpret_cast<const float*>(res.data);
MOZ_ALWAYS_TRUE(dom::ToJSValue(cx, *ptr, retval));
return;
}
case LOCAL_GL_INT: {
const auto ptr = reinterpret_cast<const int32_t*>(res.data);
MOZ_ALWAYS_TRUE(dom::ToJSValue(cx, *ptr, retval));
return;
}
case LOCAL_GL_UNSIGNED_INT:
case LOCAL_GL_SAMPLER_2D:
case LOCAL_GL_SAMPLER_3D:
case LOCAL_GL_SAMPLER_CUBE:
case LOCAL_GL_SAMPLER_2D_SHADOW:
case LOCAL_GL_SAMPLER_2D_ARRAY:
case LOCAL_GL_SAMPLER_2D_ARRAY_SHADOW:
case LOCAL_GL_SAMPLER_CUBE_SHADOW:
case LOCAL_GL_INT_SAMPLER_2D:
case LOCAL_GL_INT_SAMPLER_3D:
case LOCAL_GL_INT_SAMPLER_CUBE:
case LOCAL_GL_INT_SAMPLER_2D_ARRAY:
case LOCAL_GL_UNSIGNED_INT_SAMPLER_2D:
case LOCAL_GL_UNSIGNED_INT_SAMPLER_3D:
case LOCAL_GL_UNSIGNED_INT_SAMPLER_CUBE:
case LOCAL_GL_UNSIGNED_INT_SAMPLER_2D_ARRAY: {
const auto ptr = reinterpret_cast<const uint32_t*>(res.data);
MOZ_ALWAYS_TRUE(dom::ToJSValue(cx, *ptr, retval));
return;
}
// -
case LOCAL_GL_BOOL_VEC2:
case LOCAL_GL_BOOL_VEC3:
case LOCAL_GL_BOOL_VEC4: {
const auto intArr = reinterpret_cast<const int32_t*>(res.data);
bool boolArr[4] = {};
for (const auto i : IntegerRange(elemCount)) {
boolArr[i] = bool(intArr[i]);
}
MOZ_ALWAYS_TRUE(dom::ToJSValue(cx, boolArr, elemCount, retval));
return;
}
case LOCAL_GL_FLOAT_VEC2:
case LOCAL_GL_FLOAT_VEC3:
case LOCAL_GL_FLOAT_VEC4:
case LOCAL_GL_FLOAT_MAT2:
case LOCAL_GL_FLOAT_MAT3:
case LOCAL_GL_FLOAT_MAT4:
case LOCAL_GL_FLOAT_MAT2x3:
case LOCAL_GL_FLOAT_MAT2x4:
case LOCAL_GL_FLOAT_MAT3x2:
case LOCAL_GL_FLOAT_MAT3x4:
case LOCAL_GL_FLOAT_MAT4x2:
case LOCAL_GL_FLOAT_MAT4x3: {
const auto ptr = reinterpret_cast<const float*>(res.data);
IgnoredErrorResult error;
JSObject* obj =
dom::Float32Array::Create(cx, this, Span(ptr, elemCount), error);
MOZ_ASSERT(obj);
retval.set(JS::ObjectOrNullValue(obj));
return;
}
case LOCAL_GL_INT_VEC2:
case LOCAL_GL_INT_VEC3:
case LOCAL_GL_INT_VEC4: {
const auto ptr = reinterpret_cast<const int32_t*>(res.data);
IgnoredErrorResult error;
JSObject* obj =
dom::Int32Array::Create(cx, this, Span(ptr, elemCount), error);
MOZ_ASSERT(obj);
retval.set(JS::ObjectOrNullValue(obj));
return;
}
case LOCAL_GL_UNSIGNED_INT_VEC2:
case LOCAL_GL_UNSIGNED_INT_VEC3:
case LOCAL_GL_UNSIGNED_INT_VEC4: {
const auto ptr = reinterpret_cast<const uint32_t*>(res.data);
IgnoredErrorResult error;
JSObject* obj =
dom::Uint32Array::Create(cx, this, Span(ptr, elemCount), error);
MOZ_ASSERT(obj);
retval.set(JS::ObjectOrNullValue(obj));
return;
}
default:
MOZ_CRASH("GFX: Invalid elemType.");
}
}
already_AddRefed<WebGLShaderPrecisionFormatJS>
ClientWebGLContext::GetShaderPrecisionFormat(const GLenum shadertype,
const GLenum precisiontype) {
if (IsContextLost()) return nullptr;
const auto info = [&]() {
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetShaderPrecisionFormat(shadertype, precisiontype);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
Maybe<webgl::ShaderPrecisionFormat> ret;
if (!child->SendGetShaderPrecisionFormat(shadertype, precisiontype, &ret)) {
ret.reset();
}
return ret;
}();
if (!info) return nullptr;
return AsAddRefed(new WebGLShaderPrecisionFormatJS(*info));
}
void ClientWebGLContext::BlendColor(GLclampf r, GLclampf g, GLclampf b,
GLclampf a) {
const FuncScope funcScope(*this, "blendColor");
if (IsContextLost()) return;
auto& state = State();
auto& cache = state.mBlendColor;
cache[0] = r;
cache[1] = g;
cache[2] = b;
cache[3] = a;
Run<RPROC(BlendColor)>(r, g, b, a);
}
void ClientWebGLContext::BlendEquationSeparateI(Maybe<GLuint> i, GLenum modeRGB,
GLenum modeAlpha) {
Run<RPROC(BlendEquationSeparate)>(i, modeRGB, modeAlpha);
}
void ClientWebGLContext::BlendFuncSeparateI(Maybe<GLuint> i, GLenum srcRGB,
GLenum dstRGB, GLenum srcAlpha,
GLenum dstAlpha) {
Run<RPROC(BlendFuncSeparate)>(i, srcRGB, dstRGB, srcAlpha, dstAlpha);
}
GLenum ClientWebGLContext::CheckFramebufferStatus(GLenum target) {
if (IsContextLost()) return LOCAL_GL_FRAMEBUFFER_UNSUPPORTED;
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->CheckFramebufferStatus(target);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
GLenum ret = 0;
if (!child->SendCheckFramebufferStatus(target, &ret)) {
ret = 0;
}
return ret;
}
void ClientWebGLContext::Clear(GLbitfield mask) {
Run<RPROC(Clear)>(mask);
AfterDrawCall();
}
// -
void ClientWebGLContext::ClearBufferTv(const GLenum buffer,
const GLint drawBuffer,
const webgl::AttribBaseType type,
JS::AutoCheckCannotGC&& nogc,
const Span<const uint8_t>& view,
const GLuint srcElemOffset) {
if (IsContextLost()) return;
const auto byteOffset = CheckedInt<size_t>(srcElemOffset) * sizeof(float);
if (!byteOffset.isValid() || byteOffset.value() > view.Length()) {
nogc.reset();
EnqueueError(LOCAL_GL_INVALID_VALUE, "`srcOffset` too large for `values`.");
return;
}
webgl::TypedQuad data;
data.type = type;
auto dataSize = data.data.size();
switch (buffer) {
case LOCAL_GL_COLOR:
break;
case LOCAL_GL_DEPTH:
dataSize = sizeof(float);
break;
case LOCAL_GL_STENCIL:
dataSize = sizeof(int32_t);
break;
default:
nogc.reset();
EnqueueError_ArgEnum("buffer", buffer);
return;
}
const auto requiredBytes = byteOffset + dataSize;
if (!requiredBytes.isValid() || requiredBytes.value() > view.Length()) {
nogc.reset();
EnqueueError(LOCAL_GL_INVALID_VALUE, "`values` too small.");
return;
}
memcpy(data.data.data(), view.data() + byteOffset.value(), dataSize);
nogc.reset(); // Done with `view`.
Run<RPROC(ClearBufferTv)>(buffer, drawBuffer, data);
AfterDrawCall();
}
void ClientWebGLContext::ClearBufferfi(GLenum buffer, GLint drawBuffer,
GLfloat depth, GLint stencil) {
Run<RPROC(ClearBufferfi)>(buffer, drawBuffer, depth, stencil);
AfterDrawCall();
}
// -
void ClientWebGLContext::ClearColor(GLclampf r, GLclampf g, GLclampf b,
GLclampf a) {
const FuncScope funcScope(*this, "clearColor");
if (IsContextLost()) return;
auto& state = State();
auto& cache = state.mClearColor;
cache[0] = r;
cache[1] = g;
cache[2] = b;
cache[3] = a;
Run<RPROC(ClearColor)>(r, g, b, a);
}
void ClientWebGLContext::ClearDepth(GLclampf v) { Run<RPROC(ClearDepth)>(v); }
void ClientWebGLContext::ClearStencil(GLint v) { Run<RPROC(ClearStencil)>(v); }
void ClientWebGLContext::ColorMaskI(Maybe<GLuint> i, bool r, bool g, bool b,
bool a) const {
const FuncScope funcScope(*this, "colorMask");
if (IsContextLost()) return;
const uint8_t mask =
uint8_t(r << 0) | uint8_t(g << 1) | uint8_t(b << 2) | uint8_t(a << 3);
Run<RPROC(ColorMask)>(i, mask);
}
void ClientWebGLContext::CullFace(GLenum face) { Run<RPROC(CullFace)>(face); }
void ClientWebGLContext::DepthFunc(GLenum func) { Run<RPROC(DepthFunc)>(func); }
void ClientWebGLContext::DepthMask(WebGLboolean b) { Run<RPROC(DepthMask)>(b); }
void ClientWebGLContext::DepthRange(GLclampf zNear, GLclampf zFar) {
const FuncScope funcScope(*this, "depthRange");
if (IsContextLost()) return;
auto& state = State();
state.mDepthRange = {zNear, zFar};
Run<RPROC(DepthRange)>(zNear, zFar);
}
void ClientWebGLContext::Flush(const bool flushGl) const {
const FuncScope funcScope(*this, "flush");
if (IsContextLost()) return;
if (flushGl) {
Run<RPROC(Flush)>();
}
if (mNotLost->inProcess) return;
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
}
void ClientWebGLContext::Finish() {
if (IsContextLost()) return;
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
inProcess->Finish();
return;
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
(void)child->SendFinish();
}
void ClientWebGLContext::FrontFace(GLenum mode) { Run<RPROC(FrontFace)>(mode); }
GLenum ClientWebGLContext::GetError() {
const FuncScope funcScope(*this, "getError");
if (mNextError) {
const auto ret = mNextError;
mNextError = 0;
return ret;
}
if (IsContextLost()) return 0;
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetError();
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
GLenum ret = 0;
if (!child->SendGetError(&ret)) {
ret = 0;
}
return ret;
}
void ClientWebGLContext::Hint(GLenum target, GLenum mode) {
Run<RPROC(Hint)>(target, mode);
}
void ClientWebGLContext::LineWidth(GLfloat width) {
Run<RPROC(LineWidth)>(width);
}
Maybe<webgl::ErrorInfo> SetPixelUnpack(
const bool isWebgl2, webgl::PixelUnpackStateWebgl* const unpacking,
const GLenum pname, const GLint param);
void ClientWebGLContext::PixelStorei(const GLenum pname, const GLint iparam) {
const FuncScope funcScope(*this, "pixelStorei");
if (IsContextLost()) return;
if (!ValidateNonNegative("param", iparam)) return;
const auto param = static_cast<uint32_t>(iparam);
auto& state = State();
auto& packState = state.mPixelPackState;
switch (pname) {
case LOCAL_GL_PACK_ALIGNMENT:
switch (param) {
case 1:
case 2:
case 4:
case 8:
break;
default:
EnqueueError(LOCAL_GL_INVALID_VALUE,
"PACK_ALIGNMENT must be one of [1,2,4,8], was %i.",
iparam);
return;
}
packState.alignmentInTypeElems = param;
return;
case LOCAL_GL_PACK_ROW_LENGTH:
if (!mIsWebGL2) break;
packState.rowLength = param;
return;
case LOCAL_GL_PACK_SKIP_PIXELS:
if (!mIsWebGL2) break;
packState.skipPixels = param;
return;
case LOCAL_GL_PACK_SKIP_ROWS:
if (!mIsWebGL2) break;
packState.skipRows = param;
return;
case dom::MOZ_debug_Binding::UNPACK_REQUIRE_FASTPATH:
if (!IsSupported(WebGLExtensionID::MOZ_debug)) {
EnqueueError_ArgEnum("pname", pname);
return;
}
break;
default:
break;
}
const auto err =
SetPixelUnpack(mIsWebGL2, &state.mPixelUnpackState, pname, iparam);
if (err) {
EnqueueError(*err);
return;
}
}
void ClientWebGLContext::PolygonOffset(GLfloat factor, GLfloat units) {
Run<RPROC(PolygonOffset)>(factor, units);
}
void ClientWebGLContext::SampleCoverage(GLclampf value, WebGLboolean invert) {
Run<RPROC(SampleCoverage)>(value, invert);
}
void ClientWebGLContext::Scissor(GLint x, GLint y, GLsizei width,
GLsizei height) {
const FuncScope funcScope(*this, "scissor");
if (IsContextLost()) return;
auto& state = State();
if (!ValidateNonNegative("width", width) ||
!ValidateNonNegative("height", height)) {
return;
}
state.mScissor = {x, y, width, height};
Run<RPROC(Scissor)>(x, y, width, height);
}
void ClientWebGLContext::StencilFuncSeparate(GLenum face, GLenum func,
GLint ref, GLuint mask) {
Run<RPROC(StencilFuncSeparate)>(face, func, ref, mask);
}
void ClientWebGLContext::StencilMaskSeparate(GLenum face, GLuint mask) {
Run<RPROC(StencilMaskSeparate)>(face, mask);
}
void ClientWebGLContext::StencilOpSeparate(GLenum face, GLenum sfail,
GLenum dpfail, GLenum dppass) {
Run<RPROC(StencilOpSeparate)>(face, sfail, dpfail, dppass);
}
void ClientWebGLContext::Viewport(GLint x, GLint y, GLsizei width,
GLsizei height) {
const FuncScope funcScope(*this, "viewport");
if (IsContextLost()) return;
auto& state = State();
if (!ValidateNonNegative("width", width) ||
!ValidateNonNegative("height", height)) {
return;
}
state.mViewport = {x, y, width, height};
Run<RPROC(Viewport)>(x, y, width, height);
}
// ------------------------- Buffer Objects -------------------------
Maybe<const webgl::ErrorInfo> ValidateBindBuffer(
const GLenum target, const webgl::BufferKind curKind) {
if (curKind == webgl::BufferKind::Undefined) return {};
auto requiredKind = webgl::BufferKind::NonIndex;
switch (target) {
case LOCAL_GL_COPY_READ_BUFFER:
case LOCAL_GL_COPY_WRITE_BUFFER:
return {}; // Always ok
case LOCAL_GL_ELEMENT_ARRAY_BUFFER:
requiredKind = webgl::BufferKind::Index;
break;
default:
break;
}
if (curKind != requiredKind) {
const auto fnKindStr = [&](const webgl::BufferKind kind) {
if (kind == webgl::BufferKind::Index) return "ELEMENT_ARRAY_BUFFER";
return "non-ELEMENT_ARRAY_BUFFER";
};
const auto info = nsPrintfCString(
"Buffer previously bound to %s cannot be now bound to %s.",
fnKindStr(curKind), fnKindStr(requiredKind));
return Some(
webgl::ErrorInfo{LOCAL_GL_INVALID_OPERATION, info.BeginReading()});
}
return {};
}
Maybe<webgl::ErrorInfo> CheckBindBufferRange(
const GLenum target, const GLuint index, const bool isBuffer,
const uint64_t offset, const uint64_t size, const webgl::Limits& limits) {
const auto fnSome = [&](const GLenum type, const nsACString& info) {
return Some(webgl::ErrorInfo{type, info.BeginReading()});
};
switch (target) {
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
if (index >= webgl::kMaxTransformFeedbackSeparateAttribs) {
const auto info = nsPrintfCString(
"`index` (%u) must be less than "
"MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS (%u).",
index, webgl::kMaxTransformFeedbackSeparateAttribs);
return fnSome(LOCAL_GL_INVALID_VALUE, info);
}
if (offset % 4 != 0 || size % 4 != 0) {
const auto info =
nsPrintfCString("`offset` (%" PRIu64 ") and `size` (%" PRIu64
") must both be aligned to 4 for"
" TRANSFORM_FEEDBACK_BUFFER.",
offset, size);
return fnSome(LOCAL_GL_INVALID_VALUE, info);
}
break;
case LOCAL_GL_UNIFORM_BUFFER:
if (index >= limits.maxUniformBufferBindings) {
const auto info = nsPrintfCString(
"`index` (%u) must be less than MAX_UNIFORM_BUFFER_BINDINGS (%u).",
index, limits.maxUniformBufferBindings);
return fnSome(LOCAL_GL_INVALID_VALUE, info);
}
if (offset % limits.uniformBufferOffsetAlignment != 0) {
const auto info =
nsPrintfCString("`offset` (%" PRIu64
") must be aligned to "
"UNIFORM_BUFFER_OFFSET_ALIGNMENT (%u).",
offset, limits.uniformBufferOffsetAlignment);
return fnSome(LOCAL_GL_INVALID_VALUE, info);
}
break;
default: {
const auto info =
nsPrintfCString("Unrecognized `target`: 0x%04x", target);
return fnSome(LOCAL_GL_INVALID_ENUM, info);
}
}
return {};
}
// -
void ClientWebGLContext::BindBuffer(const GLenum target,
WebGLBufferJS* const buffer) {
const FuncScope funcScope(*this, "bindBuffer");
if (IsContextLost()) return;
if (buffer && !buffer->ValidateUsable(*this, "buffer")) return;
// -
// Check for INVALID_ENUM
auto& state = State();
auto* slot = &(state.mBoundVao->mIndexBuffer);
if (target != LOCAL_GL_ELEMENT_ARRAY_BUFFER) {
const auto itr = state.mBoundBufferByTarget.find(target);
if (itr == state.mBoundBufferByTarget.end()) {
EnqueueError_ArgEnum("target", target);
return;
}
slot = &(itr->second);
}
// -
auto kind = webgl::BufferKind::Undefined;
if (buffer) {
kind = buffer->mKind;
}
const auto err = ValidateBindBuffer(target, kind);
if (err) {
EnqueueError(err->type, "%s", err->info.c_str());
return;
}
// -
// Validation complete
if (buffer && buffer->mKind == webgl::BufferKind::Undefined) {
if (target == LOCAL_GL_ELEMENT_ARRAY_BUFFER) {
buffer->mKind = webgl::BufferKind::Index;
} else {
buffer->mKind = webgl::BufferKind::NonIndex;
}
}
*slot = buffer;
// -
Run<RPROC(BindBuffer)>(target, buffer ? buffer->mId : 0);
}
// -
void ClientWebGLContext::BindBufferRangeImpl(const GLenum target,
const GLuint index,
WebGLBufferJS* const buffer,
const uint64_t offset,
const uint64_t size) {
if (buffer && !buffer->ValidateUsable(*this, "buffer")) return;
auto& state = State();
// -
const auto& limits = Limits();
auto err =
CheckBindBufferRange(target, index, bool(buffer), offset, size, limits);
if (err) {
EnqueueError(err->type, "%s", err->info.c_str());
return;
}
// -
auto kind = webgl::BufferKind::Undefined;
if (buffer) {
kind = buffer->mKind;
}
err = ValidateBindBuffer(target, kind);
if (err) {
EnqueueError(err->type, "%s", err->info.c_str());
return;
}
if (target == LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER) {
if (state.mTfActiveAndNotPaused) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Cannot change TRANSFORM_FEEDBACK_BUFFER while "
"TransformFeedback is active and not paused.");
return;
}
}
// -
// Validation complete
if (buffer && buffer->mKind == webgl::BufferKind::Undefined) {
buffer->mKind = webgl::BufferKind::NonIndex;
}
// -
switch (target) {
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER:
state.mBoundTfo->mAttribBuffers[index] = buffer;
break;
case LOCAL_GL_UNIFORM_BUFFER:
state.mBoundUbos[index] = buffer;
break;
default:
MOZ_CRASH("Bad `target`");
}
state.mBoundBufferByTarget[target] = buffer;
// -
Run<RPROC(BindBufferRange)>(target, index, buffer ? buffer->mId : 0, offset,
size);
}
static inline size_t SizeOfViewElem(const dom::ArrayBufferView& view) {
const auto& elemType = view.Type();
if (elemType == js::Scalar::MaxTypedArrayViewType) // DataViews.
return 1;
return js::Scalar::byteSize(elemType);
}
void ClientWebGLContext::GetBufferSubData(GLenum target, GLintptr srcByteOffset,
const dom::ArrayBufferView& dstData,
GLuint dstElemOffset,
GLuint dstElemCountOverride) {
const FuncScope funcScope(*this, "getBufferSubData");
if (IsContextLost()) return;
const auto notLost =
mNotLost; // Hold a strong-ref to prevent LoseContext=>UAF.
if (!ValidateNonNegative("srcByteOffset", srcByteOffset)) return;
size_t elemSize = SizeOfViewElem(dstData);
dstData.ProcessFixedData([&](const Span<uint8_t>& aData) {
const auto& destView =
ValidateArrayBufferView(aData, elemSize, dstElemOffset,
dstElemCountOverride, LOCAL_GL_INVALID_VALUE);
if (!destView) {
return;
}
const auto& inProcessContext = notLost->inProcess;
if (inProcessContext) {
inProcessContext->GetBufferSubData(target, srcByteOffset, *destView);
return;
}
const auto& child = notLost->outOfProcess;
child->FlushPendingCmds();
mozilla::ipc::Shmem rawShmem;
if (!child->SendGetBufferSubData(target, srcByteOffset, destView->size(),
&rawShmem)) {
return;
}
const webgl::RaiiShmem shmem{child, rawShmem};
if (!shmem) {
EnqueueError(LOCAL_GL_OUT_OF_MEMORY, "Failed to map in sub data buffer.");
return;
}
const auto shmemView = Span{shmem.ByteRange()};
MOZ_RELEASE_ASSERT(shmemView.size() == 1 + destView->size());
const auto ok = bool(shmemView[0]);
const auto srcView = shmemView.subspan(1);
if (ok) {
Memcpy(&*destView, srcView);
}
});
}
////
void ClientWebGLContext::BufferData(GLenum target, WebGLsizeiptr rawSize,
GLenum usage) {
const FuncScope funcScope(*this, "bufferData");
if (!ValidateNonNegative("size", rawSize)) return;
const auto size = MaybeAs<size_t>(rawSize);
if (!size) {
EnqueueError(LOCAL_GL_OUT_OF_MEMORY, "`size` too large for platform.");
return;
}
Run<RPROC(BufferData_SizeOnly)>(target, *size, usage);
}
void ClientWebGLContext::BufferData(
GLenum target, const dom::Nullable<dom::ArrayBuffer>& maybeSrc,
GLenum usage) {
const FuncScope funcScope(*this, "bufferData");
if (!ValidateNonNull("src", maybeSrc)) return;
const auto& src = maybeSrc.Value();
src.ProcessFixedData([&](const Span<const uint8_t>& aData) {
Run<RPROC(BufferData)>(target, aData, usage);
});
}
void ClientWebGLContext::BufferData(GLenum target,
const dom::ArrayBufferView& src,
GLenum usage, GLuint srcElemOffset,
GLuint srcElemCountOverride) {
const FuncScope funcScope(*this, "bufferData");
size_t elemSize = SizeOfViewElem(src);
src.ProcessFixedData([&](const Span<uint8_t>& aData) {
const auto& range =
ValidateArrayBufferView(aData, elemSize, srcElemOffset,
srcElemCountOverride, LOCAL_GL_INVALID_VALUE);
if (!range) {
return;
}
Run<RPROC(BufferData)>(target, *range, usage);
});
}
////
void ClientWebGLContext::BufferSubData(GLenum target,
WebGLsizeiptr dstByteOffset,
const dom::ArrayBuffer& src) {
const FuncScope funcScope(*this, "bufferSubData");
src.ProcessFixedData([&](const Span<const uint8_t>& aData) {
Run<RPROC(BufferSubData)>(target, dstByteOffset, aData,
/* unsynchronized */ false);
});
}
void ClientWebGLContext::BufferSubData(GLenum target,
WebGLsizeiptr dstByteOffset,
const dom::ArrayBufferView& src,
GLuint srcElemOffset,
GLuint srcElemCountOverride) {
const FuncScope funcScope(*this, "bufferSubData");
size_t elemSize = SizeOfViewElem(src);
src.ProcessFixedData([&](const Span<uint8_t>& aData) {
const auto& range =
ValidateArrayBufferView(aData, elemSize, srcElemOffset,
srcElemCountOverride, LOCAL_GL_INVALID_VALUE);
if (!range) {
return;
}
Run<RPROC(BufferSubData)>(target, dstByteOffset, *range,
/* unsynchronized */ false);
});
}
void ClientWebGLContext::CopyBufferSubData(GLenum readTarget,
GLenum writeTarget,
GLintptr readOffset,
GLintptr writeOffset,
GLsizeiptr size) {
const FuncScope funcScope(*this, "copyBufferSubData");
if (!ValidateNonNegative("readOffset", readOffset) ||
!ValidateNonNegative("writeOffset", writeOffset) ||
!ValidateNonNegative("size", size)) {
return;
}
Run<RPROC(CopyBufferSubData)>(
readTarget, writeTarget, static_cast<uint64_t>(readOffset),
static_cast<uint64_t>(writeOffset), static_cast<uint64_t>(size));
}
// -------------------------- Framebuffer Objects --------------------------
void ClientWebGLContext::BindFramebuffer(const GLenum target,
WebGLFramebufferJS* const fb) {
const FuncScope funcScope(*this, "bindFramebuffer");
if (IsContextLost()) return;
if (fb && !fb->ValidateUsable(*this, "fb")) return;
if (!IsFramebufferTarget(mIsWebGL2, target)) {
EnqueueError_ArgEnum("target", target);
return;
}
// -
auto& state = State();
switch (target) {
case LOCAL_GL_FRAMEBUFFER:
state.mBoundDrawFb = fb;
state.mBoundReadFb = fb;
break;
case LOCAL_GL_DRAW_FRAMEBUFFER:
state.mBoundDrawFb = fb;
break;
case LOCAL_GL_READ_FRAMEBUFFER:
state.mBoundReadFb = fb;
break;
default:
MOZ_CRASH();
}
// -
if (fb) {
fb->mHasBeenBound = true;
}
Run<RPROC(BindFramebuffer)>(target, fb ? fb->mId : 0);
}
// -
void ClientWebGLContext::FramebufferTexture2D(GLenum target, GLenum attachSlot,
GLenum bindImageTarget,
WebGLTextureJS* const tex,
GLint mipLevel) const {
const FuncScope funcScope(*this, "framebufferTexture2D");
if (IsContextLost()) return;
const auto bindTexTarget = ImageToTexTarget(bindImageTarget);
uint32_t zLayer = 0;
switch (bindTexTarget) {
case LOCAL_GL_TEXTURE_2D:
break;
case LOCAL_GL_TEXTURE_CUBE_MAP:
zLayer = bindImageTarget - LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_X;
break;
default:
EnqueueError_ArgEnum("imageTarget", bindImageTarget);
return;
}
if (!mIsWebGL2 &&
!IsExtensionEnabled(WebGLExtensionID::OES_fbo_render_mipmap)) {
if (mipLevel != 0) {
EnqueueError(LOCAL_GL_INVALID_VALUE,
"mipLevel != 0 requires OES_fbo_render_mipmap.");
return;
}
}
FramebufferAttach(target, attachSlot, bindImageTarget, nullptr, tex,
static_cast<uint32_t>(mipLevel), zLayer, 0);
}
Maybe<webgl::ErrorInfo> CheckFramebufferAttach(const GLenum bindImageTarget,
const GLenum curTexTarget,
const uint32_t mipLevel,
const uint32_t zLayerBase,
const uint32_t zLayerCount,
const webgl::Limits& limits) {
if (!curTexTarget) {
return Some(
webgl::ErrorInfo{LOCAL_GL_INVALID_OPERATION,
"`tex` not yet bound. Call bindTexture first."});
}
auto texTarget = curTexTarget;
if (bindImageTarget) {
// FramebufferTexture2D
const auto bindTexTarget = ImageToTexTarget(bindImageTarget);
if (curTexTarget != bindTexTarget) {
return Some(webgl::ErrorInfo{LOCAL_GL_INVALID_OPERATION,
"`tex` cannot be rebound to a new target."});
}
switch (bindTexTarget) {
case LOCAL_GL_TEXTURE_2D:
case LOCAL_GL_TEXTURE_CUBE_MAP:
break;
default:
return Some(webgl::ErrorInfo{LOCAL_GL_INVALID_ENUM,
"`tex` must have been bound to target "
"TEXTURE_2D or TEXTURE_CUBE_MAP."});
}
texTarget = bindTexTarget;
} else {
// FramebufferTextureLayer/Multiview
switch (curTexTarget) {
case LOCAL_GL_TEXTURE_2D_ARRAY:
case LOCAL_GL_TEXTURE_3D:
break;
default:
return Some(webgl::ErrorInfo{LOCAL_GL_INVALID_OPERATION,
"`tex` must have been bound to target "
"TEXTURE_2D_ARRAY or TEXTURE_3D."});
}
}
MOZ_ASSERT(texTarget);
uint32_t maxSize;
uint32_t maxZ;
switch (texTarget) {
case LOCAL_GL_TEXTURE_2D:
maxSize = limits.maxTex2dSize;
maxZ = 1;
break;
case LOCAL_GL_TEXTURE_CUBE_MAP:
maxSize = limits.maxTexCubeSize;
maxZ = 6;
break;
case LOCAL_GL_TEXTURE_2D_ARRAY:
maxSize = limits.maxTex2dSize;
maxZ = limits.maxTexArrayLayers;
break;
case LOCAL_GL_TEXTURE_3D:
maxSize = limits.maxTex3dSize;
maxZ = limits.maxTex3dSize;
break;
default:
MOZ_CRASH();
}
const auto maxMipLevel = FloorLog2(maxSize);
if (mipLevel > maxMipLevel) {
return Some(webgl::ErrorInfo{LOCAL_GL_INVALID_VALUE,
"`mipLevel` too large for texture target."});
}
const auto requiredZLayers = CheckedInt<uint32_t>(zLayerBase) + zLayerCount;
if (!requiredZLayers.isValid() || requiredZLayers.value() > maxZ) {
return Some(webgl::ErrorInfo{LOCAL_GL_INVALID_VALUE,
"`zLayer` too large for texture target."});
}
return {};
}
void ClientWebGLContext::FramebufferAttach(
const GLenum target, const GLenum attachSlot, const GLenum bindImageTarget,
WebGLRenderbufferJS* const rb, WebGLTextureJS* const tex,
const uint32_t mipLevel, const uint32_t zLayerBase,
const uint32_t numViewLayers) const {
if (rb && !rb->ValidateUsable(*this, "rb")) return;
if (tex && !tex->ValidateUsable(*this, "tex")) return;
const auto& state = State();
const auto& limits = Limits();
if (!IsFramebufferTarget(mIsWebGL2, target)) {
EnqueueError_ArgEnum("target", target);
return;
}
auto fb = state.mBoundDrawFb;
if (target == LOCAL_GL_READ_FRAMEBUFFER) {
fb = state.mBoundReadFb;
}
if (!fb) {
EnqueueError(LOCAL_GL_INVALID_OPERATION, "No framebuffer bound.");
return;
}
if (fb->mOpaque) {
EnqueueError(
LOCAL_GL_INVALID_OPERATION,
"An opaque framebuffer's attachments cannot be inspected or changed.");
return;
}
// -
// Multiview-specific validation skipped by Host.
if (tex && numViewLayers) {
if (tex->mTarget != LOCAL_GL_TEXTURE_2D_ARRAY) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"`tex` must have been bound to target TEXTURE_2D_ARRAY.");
return;
}
if (numViewLayers > limits.maxMultiviewLayers) {
EnqueueError(LOCAL_GL_INVALID_VALUE,
"`numViews` (%u) must be <= MAX_VIEWS (%u).", numViewLayers,
limits.maxMultiviewLayers);
return;
}
}
// -
webgl::ObjectId id = 0;
if (tex) {
auto zLayerCount = numViewLayers;
if (!zLayerCount) {
zLayerCount = 1;
}
const auto err =
CheckFramebufferAttach(bindImageTarget, tex->mTarget, mipLevel,
zLayerBase, zLayerCount, limits);
if (err) {
EnqueueError(err->type, "%s", err->info.c_str());
return;
}
id = tex->mId;
} else if (rb) {
if (!rb->mHasBeenBound) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"`rb` has not yet been bound with BindRenderbuffer.");
return;
}
id = rb->mId;
}
// Ready!
// But DEPTH_STENCIL in webgl2 is actually two slots!
const auto fnAttachTo = [&](const GLenum actualAttachSlot) {
const auto slot = fb->GetAttachment(actualAttachSlot);
if (!slot) {
EnqueueError_ArgEnum("attachment", actualAttachSlot);
return;
}
slot->rb = rb;
slot->tex = tex;
Run<RPROC(FramebufferAttach)>(target, actualAttachSlot, bindImageTarget, id,
mipLevel, zLayerBase, numViewLayers);
};
if (mIsWebGL2 && attachSlot == LOCAL_GL_DEPTH_STENCIL_ATTACHMENT) {
fnAttachTo(LOCAL_GL_DEPTH_ATTACHMENT);
fnAttachTo(LOCAL_GL_STENCIL_ATTACHMENT);
} else {
fnAttachTo(attachSlot);
}
if (bindImageTarget) {
if (rb) {
rb->mHasBeenBound = true;
}
if (tex) {
tex->mTarget = ImageToTexTarget(bindImageTarget);
}
}
}
// -
void ClientWebGLContext::BlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1,
GLint srcY1, GLint dstX0, GLint dstY0,
GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter) {
Run<RPROC(BlitFramebuffer)>(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1,
dstY1, mask, filter);
AfterDrawCall();
}
void ClientWebGLContext::InvalidateFramebuffer(
GLenum target, const dom::Sequence<GLenum>& attachments,
ErrorResult& unused) {
Run<RPROC(InvalidateFramebuffer)>(target, Span{attachments});
// Never invalidate the backbuffer, so never needs AfterDrawCall.
}
void ClientWebGLContext::InvalidateSubFramebuffer(
GLenum target, const dom::Sequence<GLenum>& attachments, GLint x, GLint y,
GLsizei width, GLsizei height, ErrorResult& unused) {
Run<RPROC(InvalidateSubFramebuffer)>(target, Span{attachments}, x, y, width,
height);
// Never invalidate the backbuffer, so never needs AfterDrawCall.
}
void ClientWebGLContext::ReadBuffer(GLenum mode) {
Run<RPROC(ReadBuffer)>(mode);
}
// ----------------------- Renderbuffer objects -----------------------
void ClientWebGLContext::BindRenderbuffer(const GLenum target,
WebGLRenderbufferJS* const rb) {
const FuncScope funcScope(*this, "bindRenderbuffer");
if (IsContextLost()) return;
if (rb && !rb->ValidateUsable(*this, "rb")) return;
auto& state = State();
if (target != LOCAL_GL_RENDERBUFFER) {
EnqueueError_ArgEnum("target", target);
return;
}
state.mBoundRb = rb;
if (rb) {
rb->mHasBeenBound = true;
}
}
void ClientWebGLContext::RenderbufferStorageMultisample(GLenum target,
GLsizei samples,
GLenum internalFormat,
GLsizei width,
GLsizei height) const {
const FuncScope funcScope(*this, "renderbufferStorageMultisample");
if (IsContextLost()) return;
if (target != LOCAL_GL_RENDERBUFFER) {
EnqueueError_ArgEnum("target", target);
return;
}
const auto& state = State();
const auto& rb = state.mBoundRb;
if (!rb) {
EnqueueError(LOCAL_GL_INVALID_OPERATION, "No renderbuffer bound");
return;
}
if (!ValidateNonNegative("width", width) ||
!ValidateNonNegative("height", height) ||
!ValidateNonNegative("samples", samples)) {
return;
}
if (internalFormat == LOCAL_GL_DEPTH_STENCIL && samples > 0) {
// While our backend supports it trivially, the spec forbids it.
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"WebGL 1's DEPTH_STENCIL format may not be multisampled. Use "
"DEPTH24_STENCIL8 when `samples > 0`.");
return;
}
Run<RPROC(RenderbufferStorageMultisample)>(
rb->mId, static_cast<uint32_t>(samples), internalFormat,
static_cast<uint32_t>(width), static_cast<uint32_t>(height));
}
// --------------------------- Texture objects ---------------------------
void ClientWebGLContext::ActiveTexture(const GLenum texUnitEnum) {
const FuncScope funcScope(*this, "activeTexture");
if (IsContextLost()) return;
if (texUnitEnum < LOCAL_GL_TEXTURE0) {
EnqueueError(LOCAL_GL_INVALID_VALUE,
"`texture` (0x%04x) must be >= TEXTURE0 (0x%04x).",
texUnitEnum, LOCAL_GL_TEXTURE0);
return;
}
const auto texUnit = texUnitEnum - LOCAL_GL_TEXTURE0;
auto& state = State();
if (texUnit >= state.mTexUnits.size()) {
EnqueueError(LOCAL_GL_INVALID_VALUE,
"TEXTURE%u must be < MAX_COMBINED_TEXTURE_IMAGE_UNITS (%zu).",
texUnit, state.mTexUnits.size());
return;
}
//-
state.mActiveTexUnit = texUnit;
Run<RPROC(ActiveTexture)>(texUnit);
}
static bool IsTexTarget(const GLenum texTarget, const bool webgl2) {
switch (texTarget) {
case LOCAL_GL_TEXTURE_2D:
case LOCAL_GL_TEXTURE_CUBE_MAP:
return true;
case LOCAL_GL_TEXTURE_2D_ARRAY:
case LOCAL_GL_TEXTURE_3D:
return webgl2;
default:
return false;
}
}
void ClientWebGLContext::BindTexture(const GLenum texTarget,
WebGLTextureJS* const tex) {
const FuncScope funcScope(*this, "bindTexture");
if (IsContextLost()) return;
if (tex && !tex->ValidateUsable(*this, "tex")) return;
if (!IsTexTarget(texTarget, mIsWebGL2)) {
EnqueueError_ArgEnum("texTarget", texTarget);
return;
}
if (tex && tex->mTarget) {
if (texTarget != tex->mTarget) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Texture previously bound to %s cannot be bound now to %s.",
EnumString(tex->mTarget).c_str(),
EnumString(texTarget).c_str());
return;
}
}
auto& state = State();
auto& texUnit = state.mTexUnits[state.mActiveTexUnit];
texUnit.texByTarget[texTarget] = tex;
if (tex) {
tex->mTarget = texTarget;
}
Run<RPROC(BindTexture)>(texTarget, tex ? tex->mId : 0);
}
void ClientWebGLContext::GenerateMipmap(GLenum texTarget) const {
Run<RPROC(GenerateMipmap)>(texTarget);
}
void ClientWebGLContext::GetTexParameter(
JSContext* cx, GLenum texTarget, GLenum pname,
JS::MutableHandle<JS::Value> retval) const {
retval.set(JS::NullValue());
const FuncScope funcScope(*this, "getTexParameter");
if (IsContextLost()) return;
auto& state = State();
auto& texUnit = state.mTexUnits[state.mActiveTexUnit];
const auto& tex = Find(texUnit.texByTarget, texTarget, nullptr);
if (!tex) {
if (!IsTexTarget(texTarget, mIsWebGL2)) {
EnqueueError_ArgEnum("texTarget", texTarget);
} else {
EnqueueError(LOCAL_GL_INVALID_OPERATION, "No texture bound to %s[%u].",
EnumString(texTarget).c_str(), state.mActiveTexUnit);
}
return;
}
const auto maybe = [&]() {
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetTexParameter(tex->mId, pname);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
Maybe<double> ret;
if (!child->SendGetTexParameter(tex->mId, pname, &ret)) {
ret.reset();
}
return ret;
}();
if (maybe) {
switch (pname) {
case LOCAL_GL_TEXTURE_IMMUTABLE_FORMAT:
retval.set(JS::BooleanValue(*maybe));
break;
default:
retval.set(JS::NumberValue(*maybe));
break;
}
}
}
void ClientWebGLContext::TexParameterf(GLenum texTarget, GLenum pname,
GLfloat param) {
Run<RPROC(TexParameter_base)>(texTarget, pname, FloatOrInt(param));
}
void ClientWebGLContext::TexParameteri(GLenum texTarget, GLenum pname,
GLint param) {
Run<RPROC(TexParameter_base)>(texTarget, pname, FloatOrInt(param));
}
////////////////////////////////////
static GLenum JSTypeMatchUnpackTypeError(GLenum unpackType,
js::Scalar::Type jsType) {
bool matches = false;
switch (unpackType) {
case LOCAL_GL_BYTE:
matches = (jsType == js::Scalar::Type::Int8);
break;
case LOCAL_GL_UNSIGNED_BYTE:
matches = (jsType == js::Scalar::Type::Uint8 ||
jsType == js::Scalar::Type::Uint8Clamped);
break;
case LOCAL_GL_SHORT:
matches = (jsType == js::Scalar::Type::Int16);
break;
case LOCAL_GL_UNSIGNED_SHORT:
case LOCAL_GL_UNSIGNED_SHORT_4_4_4_4:
case LOCAL_GL_UNSIGNED_SHORT_5_5_5_1:
case LOCAL_GL_UNSIGNED_SHORT_5_6_5:
case LOCAL_GL_HALF_FLOAT:
case LOCAL_GL_HALF_FLOAT_OES:
matches = (jsType == js::Scalar::Type::Uint16);
break;
case LOCAL_GL_INT:
matches = (jsType == js::Scalar::Type::Int32);
break;
case LOCAL_GL_UNSIGNED_INT:
case LOCAL_GL_UNSIGNED_INT_2_10_10_10_REV:
case LOCAL_GL_UNSIGNED_INT_10F_11F_11F_REV:
case LOCAL_GL_UNSIGNED_INT_5_9_9_9_REV:
case LOCAL_GL_UNSIGNED_INT_24_8:
matches = (jsType == js::Scalar::Type::Uint32);
break;
case LOCAL_GL_FLOAT:
matches = (jsType == js::Scalar::Type::Float32);
break;
case LOCAL_GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
matches = false; // No valid jsType, but we allow uploads with null.
break;
default:
return LOCAL_GL_INVALID_ENUM;
}
if (!matches) return LOCAL_GL_INVALID_OPERATION;
return 0;
}
/////////////////////////////////////////////////
static inline uvec2 CastUvec2(const ivec2& val) {
return {static_cast<uint32_t>(val.x), static_cast<uint32_t>(val.y)};
}
static inline uvec3 CastUvec3(const ivec3& val) {
return {static_cast<uint32_t>(val.x), static_cast<uint32_t>(val.y),
static_cast<uint32_t>(val.z)};
}
template <typename T>
Range<T> SubRange(const Range<T>& full, const size_t offset,
const size_t length) {
const auto newBegin = full.begin() + offset;
return Range<T>{newBegin, newBegin + length};
}
Maybe<Span<const uint8_t>> GetRangeFromData(const Span<uint8_t>& data,
size_t bytesPerElem,
GLuint elemOffset,
GLuint elemCountOverride) {
auto elemCount = data.size() / bytesPerElem;
if (elemOffset > elemCount) return {};
elemCount -= elemOffset;
if (elemCountOverride) {
if (elemCountOverride > elemCount) return {};
elemCount = elemCountOverride;
}
return Some(
data.subspan(elemOffset * bytesPerElem, elemCount * bytesPerElem));
}
// -
static bool IsTexTargetForDims(const GLenum texTarget, const bool webgl2,
const uint8_t funcDims) {
if (!IsTexTarget(texTarget, webgl2)) return false;
switch (texTarget) {
case LOCAL_GL_TEXTURE_2D:
case LOCAL_GL_TEXTURE_CUBE_MAP:
return funcDims == 2;
default:
return funcDims == 3;
}
}
void ClientWebGLContext::TexStorage(uint8_t funcDims, GLenum texTarget,
GLsizei levels, GLenum internalFormat,
const ivec3& size) const {
const FuncScope funcScope(*this, "texStorage[23]D");
if (IsContextLost()) return;
if (!IsTexTargetForDims(texTarget, mIsWebGL2, funcDims)) {
EnqueueError_ArgEnum("texTarget", texTarget);
return;
}
Run<RPROC(TexStorage)>(texTarget, static_cast<uint32_t>(levels),
internalFormat, CastUvec3(size));
}
// -
void webgl::TexUnpackBlobDesc::Shrink(const webgl::PackingInfo& pi) {
if (cpuData) {
if (!size.x || !size.y || !size.z) return;
const auto unpackRes = ExplicitUnpacking(pi, {});
if (!unpackRes.isOk()) {
return;
}
const auto& unpack = unpackRes.inspect();
const auto bytesUpperBound =
CheckedInt<size_t>(unpack.metrics.bytesPerRowStride) *
unpack.metrics.totalRows;
if (bytesUpperBound.isValid()) {
auto& span = *cpuData;
span = span.subspan(0, std::min(span.size(), bytesUpperBound.value()));
}
}
}
// -
void ClientWebGLContext::TexImage(uint8_t funcDims, GLenum imageTarget,
GLint level, GLenum respecFormat,
const ivec3& offset,
const Maybe<ivec3>& isize, GLint border,
const webgl::PackingInfo& pi,
const TexImageSource& src) const {
const FuncScope funcScope(*this, "tex(Sub)Image[23]D");
if (IsContextLost()) return;
if (!IsTexTargetForDims(ImageToTexTarget(imageTarget), mIsWebGL2, funcDims)) {
EnqueueError_ArgEnum("imageTarget", imageTarget);
return;
}
if (border != 0) {
EnqueueError(LOCAL_GL_INVALID_VALUE, "`border` must be 0.");
return;
}
Maybe<uvec3> size;
if (isize) {
size = Some(CastUvec3(isize.value()));
}
// -
// -
bool isDataUpload = false;
auto desc = [&]() -> Maybe<webgl::TexUnpackBlobDesc> {
if (src.mPboOffset) {
isDataUpload = true;
const auto offset = static_cast<uint64_t>(*src.mPboOffset);
return Some(webgl::TexUnpackBlobDesc{imageTarget,
size.value(),
gfxAlphaType::NonPremult,
{},
Some(offset)});
}
if (src.mView) {
isDataUpload = true;
const auto& view = *src.mView;
const auto& jsType = view.Type();
const auto err = JSTypeMatchUnpackTypeError(pi.type, jsType);
switch (err) {
case LOCAL_GL_INVALID_ENUM:
EnqueueError_ArgEnum("unpackType", pi.type);
return {};
case LOCAL_GL_INVALID_OPERATION:
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"ArrayBufferView type %s not compatible with `type` %s.",
name(jsType), EnumString(pi.type).c_str());
return {};
default:
break;
}
return view.ProcessData(
[&](const Span<uint8_t>& aData,
JS::AutoCheckCannotGC&& nogc) -> Maybe<webgl::TexUnpackBlobDesc> {
const auto range = GetRangeFromData(aData, SizeOfViewElem(view),
src.mViewElemOffset,
src.mViewElemLengthOverride);
if (!range) {
nogc.reset();
EnqueueError(LOCAL_GL_INVALID_OPERATION, "`source` too small.");
return {};
}
return Some(webgl::TexUnpackBlobDesc{imageTarget,
size.value(),
gfxAlphaType::NonPremult,
Some(*range),
{}});
});
}
if (src.mImageBitmap) {
return webgl::FromImageBitmap(imageTarget, size, *(src.mImageBitmap),
src.mOut_error);
}
if (src.mImageData) {
const auto& imageData = *src.mImageData;
dom::Uint8ClampedArray scopedArr;
MOZ_RELEASE_ASSERT(scopedArr.Init(imageData.GetDataObject()));
return scopedArr.ProcessData(
[&](const Span<uint8_t>& aData,
JS::AutoCheckCannotGC&& nogc) -> Maybe<webgl::TexUnpackBlobDesc> {
const auto dataSize = aData.Length();
const auto data = aData.Elements();
if (dataSize == 0) {
nogc.reset(); // aData will not be used.
EnqueueError(
LOCAL_GL_INVALID_VALUE,
"ImageData.data.buffer is Detached. (Maybe you Transfered "
"it to a Worker?");
return {};
}
// -
const gfx::IntSize imageSize(imageData.Width(), imageData.Height());
const auto sizeFromDims =
CheckedInt<size_t>(imageSize.width) * imageSize.height * 4;
MOZ_RELEASE_ASSERT(sizeFromDims.isValid() &&
sizeFromDims.value() == dataSize);
const RefPtr<gfx::DataSourceSurface> surf =
gfx::Factory::CreateWrappingDataSourceSurface(
data, imageSize.width * 4, imageSize,
gfx::SurfaceFormat::R8G8B8A8);
MOZ_ASSERT(surf);
// -
const auto imageUSize = *uvec2::FromSize(imageSize);
const auto concreteSize =
size.valueOr(uvec3{imageUSize.x, imageUSize.y, 1});
// WhatWG "HTML Living Standard" (30 October 2015):
// "The getImageData(sx, sy, sw, sh) method [...] Pixels must be
// returned as non-premultiplied alpha values."
auto result =
Some(webgl::TexUnpackBlobDesc{imageTarget,
concreteSize,
gfxAlphaType::NonPremult,
{},
{},
Some(imageUSize),
nullptr,
{},
surf});
nogc.reset(); // Done with aData
return result;
});
}
if (src.mOffscreenCanvas) {
return webgl::FromOffscreenCanvas(
*this, imageTarget, size, *(src.mOffscreenCanvas), src.mOut_error);
}
if (src.mVideoFrame) {
return webgl::FromVideoFrame(*this, imageTarget, size, *(src.mVideoFrame),
src.mOut_error);
}
if (src.mDomElem) {
return webgl::FromDomElem(*this, imageTarget, size, *(src.mDomElem),
src.mOut_error);
}
return Some(webgl::TexUnpackBlobDesc{
imageTarget, size.value(), gfxAlphaType::NonPremult, {}, {}});
}();
if (!desc) {
return;
}
// -
const auto& rawUnpacking = State().mPixelUnpackState;
{
auto defaultSubrectState = webgl::PixelPackingState{};
defaultSubrectState.alignmentInTypeElems =
rawUnpacking.alignmentInTypeElems;
const bool isSubrect = (rawUnpacking != defaultSubrectState);
if (isDataUpload && isSubrect) {
if (rawUnpacking.flipY || rawUnpacking.premultiplyAlpha) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Non-DOM-Element uploads with alpha-premult"
" or y-flip do not support subrect selection.");
return;
}
}
}
desc->unpacking = rawUnpacking;
if (desc->structuredSrcSize) {
// WebGL 2 spec:
// ### 5.35 Pixel store parameters for uploads from TexImageSource
// UNPACK_ALIGNMENT and UNPACK_ROW_LENGTH are ignored.
const auto& elemSize = *desc->structuredSrcSize;
desc->unpacking.alignmentInTypeElems = 1;
desc->unpacking.rowLength = elemSize.x;
}
if (!desc->unpacking.rowLength) {
desc->unpacking.rowLength = desc->size.x;
}
if (!desc->unpacking.imageHeight) {
desc->unpacking.imageHeight = desc->size.y;
}
// -
// -
mozilla::ipc::Shmem* pShmem = nullptr;
// Image to release after WebGLContext::TexImage().
RefPtr<layers::Image> keepAliveImage;
if (desc->sd) {
const auto& sd = *(desc->sd);
const auto sdType = sd.type();
const auto& contextInfo = mNotLost->info;
const auto fallbackReason = [&]() -> Maybe<std::string> {
auto fallbackReason =
BlitPreventReason(level, offset, respecFormat, pi, *desc,
contextInfo.optionalRenderableFormatBits);
if (fallbackReason) return fallbackReason;
const bool canUploadViaSd = contextInfo.uploadableSdTypes[sdType];
if (!canUploadViaSd) {
const nsPrintfCString msg(
"Fast uploads for resource type %i not implemented.", int(sdType));
return Some(ToString(msg));
}
switch (sdType) {
default:
break;
case layers::SurfaceDescriptor::TSurfaceDescriptorBuffer: {
const auto& sdb = sd.get_SurfaceDescriptorBuffer();
const auto& data = sdb.data();
if (data.type() == layers::MemoryOrShmem::TShmem) {
pShmem = &data.get_Shmem();
} else {
return Some(
std::string{"SurfaceDescriptorBuffer data is not Shmem."});
}
} break;
case layers::SurfaceDescriptor::TSurfaceDescriptorD3D10: {
const auto& sdD3D = sd.get_SurfaceDescriptorD3D10();
const auto& inProcess = mNotLost->inProcess;
MOZ_ASSERT(desc->image);
keepAliveImage = desc->image;
if (sdD3D.gpuProcessTextureId().isSome() && inProcess) {
return Some(
std::string{"gpuProcessTextureId works only in GPU process."});
}
} break;
case layers::SurfaceDescriptor::TSurfaceDescriptorGPUVideo: {
const auto& inProcess = mNotLost->inProcess;
MOZ_ASSERT(desc->image);
keepAliveImage = desc->image;
if (inProcess) {
return Some(std::string{
"SurfaceDescriptorGPUVideo works only in GPU process."});
}
const auto& sdv = sd.get_SurfaceDescriptorGPUVideo();
if (sdv.type() != layers::SurfaceDescriptorGPUVideo::
TSurfaceDescriptorRemoteDecoder) {
return Some(std::string{
"SurfaceDescriptorGPUVideo does not contain RemoteDecoder."});
}
const auto& sdrd = sdv.get_SurfaceDescriptorRemoteDecoder();
const auto& subdesc = sdrd.subdesc();
if (subdesc.type() !=
layers::RemoteDecoderVideoSubDescriptor::Tnull_t) {
return Some(
std::string{"SurfaceDescriptorGPUVideo does not contain "
"RemoteDecoder null subdesc."});
}
} break;
}
switch (respecFormat) {
case LOCAL_GL_SRGB:
case LOCAL_GL_SRGB8:
case LOCAL_GL_SRGB_ALPHA:
case LOCAL_GL_SRGB8_ALPHA8: {
const nsPrintfCString msg(
"srgb-encoded formats (like %s) are not supported.",
EnumString(respecFormat).c_str());
return Some(ToString(msg));
}
}
if (StaticPrefs::webgl_disable_DOM_blit_uploads()) {
return Some(std::string{"DOM blit uploads are disabled."});
}
return {};
}();
if (fallbackReason) {
EnqueuePerfWarning("Missed GPU-copy fast-path: %s",
fallbackReason->c_str());
const auto& image = desc->image;
const RefPtr<gfx::SourceSurface> surf = image->GetAsSourceSurface();
if (surf) {
// WARNING: OSX can lose our MakeCurrent here.
desc->dataSurf = surf->GetDataSurface();
}
if (!desc->dataSurf) {
EnqueueError(LOCAL_GL_OUT_OF_MEMORY,
"Failed to retrieve source bytes for CPU upload.");
return;
}
desc->sd = Nothing();
}
}
desc->image = nullptr;
desc->Shrink(pi);
// -
std::shared_ptr<webgl::RaiiShmem> tempShmem;
const bool doInlineUpload = !desc->sd;
// Why always de-inline SDs here?
// 1. This way we always send SDs down the same handling path, which
// should keep things from breaking if things flip between paths because of
// what we get handed by SurfaceFromElement etc.
// 2. We don't actually always grab strong-refs to the resources in the SDs,
// so we should try to use them sooner rather than later. Yes we should fix
// this, but for now let's give the SDs the best chance of lucking out, eh?
// :)
// 3. It means we don't need to write QueueParamTraits<SurfaceDescriptor>.
if (doInlineUpload) {
// We definitely want e.g. TexImage(PBO) here.
Run<RPROC(TexImage)>(static_cast<uint32_t>(level), respecFormat,
CastUvec3(offset), pi, std::move(*desc));
} else {
// We can't handle shmems like SurfaceDescriptorBuffer inline, so use ipdl.
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->TexImage(static_cast<uint32_t>(level), respecFormat,
CastUvec3(offset), pi, *desc);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
// The shmem we're handling was only shared from RDD to Content, and
// immediately on Content receiving it, it was closed! RIP
// Eventually we'll be able to make shmems that can traverse multiple
// endpoints, but for now we need to make a new Content->WebGLParent shmem
// and memcpy into it. We don't use `desc` elsewhere, so just replace the
// Shmem buried within it with one that's valid for WebGLChild->Parent
// transport.
if (pShmem) {
MOZ_ASSERT(desc->sd);
const auto srcBytes = ShmemRange<uint8_t>(*pShmem);
tempShmem = std::make_shared<webgl::RaiiShmem>();
// We need Unsafe because we want to dictate when to destroy it from the
// client side.
*tempShmem = webgl::RaiiShmem::AllocUnsafe(child, srcBytes.length());
if (!*tempShmem) {
NS_WARNING("AllocShmem failed in TexImage");
return;
}
const auto dstBytes = ShmemRange<uint8_t>(tempShmem->Shmem());
Memcpy(&dstBytes, srcBytes.begin());
*pShmem = tempShmem->Shmem();
// Not Extract, because we free tempShmem manually below, after the remote
// side has finished executing SendTexImage.
}
(void)child->SendTexImage(static_cast<uint32_t>(level), respecFormat,
CastUvec3(offset), pi, std::move(*desc));
if (tempShmem || keepAliveImage) {
const auto eventTarget = GetCurrentSerialEventTarget();
MOZ_ASSERT(eventTarget);
child->SendPing()->Then(eventTarget, __func__,
[tempShmem, keepAliveImage]() {
// Cleans up when (our copy of)
// sendableShmem/image goes out of scope.
});
}
}
}
// -
void ClientWebGLContext::CompressedTexImage(bool sub, uint8_t funcDims,
GLenum imageTarget, GLint level,
GLenum format, const ivec3& offset,
const ivec3& isize, GLint border,
const TexImageSource& src,
GLsizei pboImageSize) const {
const FuncScope funcScope(*this, "compressedTex(Sub)Image[23]D");
if (IsContextLost()) return;
if (!IsTexTargetForDims(ImageToTexTarget(imageTarget), mIsWebGL2, funcDims)) {
EnqueueError_ArgEnum("imageTarget", imageTarget);
return;
}
if (border != 0) {
EnqueueError(LOCAL_GL_INVALID_VALUE, "`border` must be 0.");
return;
}
if (src.mView) {
src.mView->ProcessData([&](const Span<uint8_t>& aData,
JS::AutoCheckCannotGC&& aNoGC) {
const auto range =
GetRangeFromData(aData, SizeOfViewElem(*src.mView),
src.mViewElemOffset, src.mViewElemLengthOverride);
if (!range) {
aNoGC.reset();
EnqueueError(LOCAL_GL_INVALID_VALUE, "`source` too small.");
return;
}
// We don't need to shrink `range` because valid calls require
// `range` to match requirements exactly.
RunWithGCData<RPROC(CompressedTexImage)>(
std::move(aNoGC), sub, imageTarget, static_cast<uint32_t>(level),
format, CastUvec3(offset), CastUvec3(isize), *range,
static_cast<uint32_t>(pboImageSize), Maybe<uint64_t>());
return;
});
return;
}
if (!src.mPboOffset) {
MOZ_CRASH("impossible");
}
if (!ValidateNonNegative("offset", *src.mPboOffset)) {
return;
}
Run<RPROC(CompressedTexImage)>(
sub, imageTarget, static_cast<uint32_t>(level), format, CastUvec3(offset),
CastUvec3(isize), Span<const uint8_t>{},
static_cast<uint32_t>(pboImageSize), Some(*src.mPboOffset));
}
void ClientWebGLContext::CopyTexImage(uint8_t funcDims, GLenum imageTarget,
GLint level, GLenum respecFormat,
const ivec3& dstOffset,
const ivec2& srcOffset, const ivec2& size,
GLint border) const {
const FuncScope funcScope(*this, "copy(Sub)Image[23]D");
if (IsContextLost()) return;
if (!IsTexTargetForDims(ImageToTexTarget(imageTarget), mIsWebGL2, funcDims)) {
EnqueueError_ArgEnum("imageTarget", imageTarget);
return;
}
if (border != 0) {
EnqueueError(LOCAL_GL_INVALID_VALUE, "`border` must be 0.");
return;
}
Run<RPROC(CopyTexImage)>(imageTarget, static_cast<uint32_t>(level),
respecFormat, CastUvec3(dstOffset), srcOffset,
CastUvec2(size));
}
// ------------------- Programs and shaders --------------------------------
void ClientWebGLContext::UseProgram(WebGLProgramJS* const prog) {
const FuncScope funcScope(*this, "useProgram");
if (IsContextLost()) return;
if (prog && !prog->ValidateUsable(*this, "prog")) return;
auto& state = State();
if (state.mTfActiveAndNotPaused) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Transform feedback is active and not paused.");
return;
}
if (prog) {
const auto& res = GetLinkResult(*prog);
if (!res.success) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Program must be linked successfully.");
return;
}
}
// -
state.mCurrentProgram = prog;
state.mProgramKeepAlive = prog ? prog->mKeepAliveWeak.lock() : nullptr;
state.mActiveLinkResult = prog ? prog->mResult : nullptr;
Run<RPROC(UseProgram)>(prog ? prog->mId : 0);
}
void ClientWebGLContext::ValidateProgram(WebGLProgramJS& prog) const {
const FuncScope funcScope(*this, "validateProgram");
if (IsContextLost()) return;
if (!prog.ValidateUsable(*this, "prog")) return;
prog.mLastValidate = [&]() {
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->ValidateProgram(prog.mId);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
bool ret = {};
if (!child->SendValidateProgram(prog.mId, &ret)) {
ret = {};
}
return ret;
}();
}
// ------------------------ Uniforms and attributes ------------------------
Maybe<double> ClientWebGLContext::GetVertexAttribPriv(const GLuint index,
const GLenum pname) {
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetVertexAttrib(index, pname);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
Maybe<double> ret;
if (!child->SendGetVertexAttrib(index, pname, &ret)) {
ret.reset();
}
return ret;
}
void ClientWebGLContext::GetVertexAttrib(JSContext* cx, GLuint index,
GLenum pname,
JS::MutableHandle<JS::Value> retval,
ErrorResult& rv) {
retval.set(JS::NullValue());
const FuncScope funcScope(*this, "getVertexAttrib");
if (IsContextLost()) return;
const auto& state = State();
const auto& genericAttribs = state.mGenericVertexAttribs;
if (index >= genericAttribs.size()) {
EnqueueError(LOCAL_GL_INVALID_VALUE, "`index` (%u) >= MAX_VERTEX_ATTRIBS",
index);
return;
}
switch (pname) {
case LOCAL_GL_CURRENT_VERTEX_ATTRIB: {
const auto& attrib = genericAttribs[index];
switch (attrib.type) {
case webgl::AttribBaseType::Float: {
const auto ptr = reinterpret_cast<const float*>(attrib.data.data());
retval.setObjectOrNull(
dom::Float32Array::Create(cx, this, Span(ptr, 4), rv));
break;
}
case webgl::AttribBaseType::Int: {
const auto ptr = reinterpret_cast<const int32_t*>(attrib.data.data());
retval.setObjectOrNull(
dom::Int32Array::Create(cx, this, Span(ptr, 4), rv));
break;
}
case webgl::AttribBaseType::Uint: {
const auto ptr =
reinterpret_cast<const uint32_t*>(attrib.data.data());
retval.setObjectOrNull(
dom::Uint32Array::Create(cx, this, Span(ptr, 4), rv));
break;
}
case webgl::AttribBaseType::Boolean:
MOZ_CRASH("impossible");
}
return;
}
case LOCAL_GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING: {
const auto& buffers = state.mBoundVao->mAttribBuffers;
const auto& buffer = buffers[index];
(void)ToJSValueOrNull(cx, buffer, retval);
return;
}
case LOCAL_GL_VERTEX_ATTRIB_ARRAY_POINTER:
// Disallowed from JS, but allowed in Host.
EnqueueError_ArgEnum("pname", pname);
return;
default:
break;
}
const auto maybe = GetVertexAttribPriv(index, pname);
if (maybe) {
switch (pname) {
case LOCAL_GL_VERTEX_ATTRIB_ARRAY_ENABLED:
case LOCAL_GL_VERTEX_ATTRIB_ARRAY_NORMALIZED:
case LOCAL_GL_VERTEX_ATTRIB_ARRAY_INTEGER:
retval.set(JS::BooleanValue(*maybe));
break;
default:
retval.set(JS::NumberValue(*maybe));
break;
}
}
}
void ClientWebGLContext::UniformData(const GLenum funcElemType,
const WebGLUniformLocationJS* const loc,
bool transpose,
const Range<const uint8_t>& bytes,
JS::AutoCheckCannotGC&& nogc,
GLuint elemOffset,
GLuint elemCountOverride) const {
// FuncScope::~FuncScope() can GC in a failure case, so all `return`
// statements need to `nogc.reset()` up until the `nogc` is consumed by
// `RunWithGCData`.
const FuncScope funcScope(*this, "uniform setter");
if (IsContextLost()) {
nogc.reset();
return;
}
const auto& activeLinkResult = GetActiveLinkResult();
if (!activeLinkResult) {
nogc.reset();
EnqueueError(LOCAL_GL_INVALID_OPERATION, "No active linked Program.");
return;
}
// -
auto availCount = bytes.length() / sizeof(float);
if (elemOffset > availCount) {
nogc.reset();
EnqueueError(LOCAL_GL_INVALID_VALUE, "`elemOffset` too large for `data`.");
return;
}
availCount -= elemOffset;
if (elemCountOverride) {
if (elemCountOverride > availCount) {
nogc.reset();
EnqueueError(LOCAL_GL_INVALID_VALUE,
"`elemCountOverride` too large for `data`.");
return;
}
availCount = elemCountOverride;
}
// -
const auto channels = ElemTypeComponents(funcElemType);
if (!availCount || availCount % channels != 0) {
nogc.reset();
EnqueueError(LOCAL_GL_INVALID_VALUE,
"`values` length (%u) must be a positive "
"integer multiple of size of %s.",
availCount, EnumString(funcElemType).c_str());
return;
}
// -
uint32_t locId = -1;
if (MOZ_LIKELY(loc)) {
locId = loc->mLocation;
if (!loc->ValidateUsable(*this, "location")) {
nogc.reset();
return;
}
// -
const auto& reqLinkInfo = loc->mParent.lock();
if (reqLinkInfo.get() != activeLinkResult) {
nogc.reset();
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"UniformLocation is not from the current active Program.");
return;
}
// -
bool funcMatchesLocation = false;
for (const auto allowed : loc->mValidUploadElemTypes) {
funcMatchesLocation |= (funcElemType == allowed);
}
if (MOZ_UNLIKELY(!funcMatchesLocation)) {
std::string validSetters;
for (const auto allowed : loc->mValidUploadElemTypes) {
validSetters += EnumString(allowed);
validSetters += '/';
}
validSetters.pop_back(); // Cheekily discard the extra trailing '/'.
nogc.reset();
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Uniform's `type` requires uniform setter of type %s.",
validSetters.c_str());
return;
}
}
// -
const auto begin =
reinterpret_cast<const webgl::UniformDataVal*>(bytes.begin().get()) +
elemOffset;
const auto range = Span{begin, availCount};
RunWithGCData<RPROC(UniformData)>(std::move(nogc), locId, transpose, range);
}
// -
void ClientWebGLContext::BindVertexArray(WebGLVertexArrayJS* const vao) {
const FuncScope funcScope(*this, "bindVertexArray");
if (IsContextLost()) return;
if (vao && !vao->ValidateUsable(*this, "vao")) return;
auto& state = State();
if (vao) {
vao->mHasBeenBound = true;
state.mBoundVao = vao;
} else {
state.mBoundVao = state.mDefaultVao;
}
Run<RPROC(BindVertexArray)>(vao ? vao->mId : 0);
}
void ClientWebGLContext::EnableVertexAttribArray(GLuint index) {
Run<RPROC(EnableVertexAttribArray)>(index);
}
void ClientWebGLContext::DisableVertexAttribArray(GLuint index) {
Run<RPROC(DisableVertexAttribArray)>(index);
}
WebGLsizeiptr ClientWebGLContext::GetVertexAttribOffset(GLuint index,
GLenum pname) {
const FuncScope funcScope(*this, "getVertexAttribOffset");
if (IsContextLost()) return 0;
if (pname != LOCAL_GL_VERTEX_ATTRIB_ARRAY_POINTER) {
EnqueueError_ArgEnum("pname", pname);
return 0;
}
const auto maybe = GetVertexAttribPriv(index, pname);
if (!maybe) return 0;
return *maybe;
}
void ClientWebGLContext::VertexAttrib4Tv(GLuint index, webgl::AttribBaseType t,
const Range<const uint8_t>& src) {
const FuncScope funcScope(*this, "vertexAttrib[1234]u?[fi]{v}");
if (IsContextLost()) return;
auto& state = State();
if (src.length() / sizeof(float) < 4) {
EnqueueError(LOCAL_GL_INVALID_VALUE, "Array must have >=4 elements.");
return;
}
auto& list = state.mGenericVertexAttribs;
if (index >= list.size()) {
EnqueueError(LOCAL_GL_INVALID_VALUE,
"`index` must be < MAX_VERTEX_ATTRIBS.");
return;
}
auto& attrib = list[index];
attrib.type = t;
memcpy(attrib.data.data(), src.begin().get(), attrib.data.size());
Run<RPROC(VertexAttrib4T)>(index, attrib);
}
// -
void ClientWebGLContext::VertexAttribDivisor(GLuint index, GLuint divisor) {
Run<RPROC(VertexAttribDivisor)>(index, divisor);
}
// -
void ClientWebGLContext::VertexAttribPointerImpl(bool isFuncInt, GLuint index,
GLint rawChannels, GLenum type,
bool normalized,
GLsizei rawByteStrideOrZero,
WebGLintptr rawByteOffset) {
const FuncScope funcScope(*this, "vertexAttribI?Pointer");
if (IsContextLost()) return;
auto& state = State();
const auto channels = MaybeAs<uint8_t>(rawChannels);
if (!channels) {
EnqueueError(LOCAL_GL_INVALID_VALUE,
"Channel count `size` must be within [1,4].");
return;
}
const auto byteStrideOrZero = MaybeAs<uint8_t>(rawByteStrideOrZero);
if (!byteStrideOrZero) {
EnqueueError(LOCAL_GL_INVALID_VALUE, "`stride` must be within [0,255].");
return;
}
if (!ValidateNonNegative("byteOffset", rawByteOffset)) return;
const auto byteOffset = static_cast<uint64_t>(rawByteOffset);
// -
const webgl::VertAttribPointerDesc desc{
isFuncInt, *channels, normalized, *byteStrideOrZero, type, byteOffset};
const auto res = CheckVertexAttribPointer(mIsWebGL2, desc);
if (res.isErr()) {
const auto& err = res.inspectErr();
EnqueueError(err.type, "%s", err.info.c_str());
return;
}
auto& list = state.mBoundVao->mAttribBuffers;
if (index >= list.size()) {
EnqueueError(LOCAL_GL_INVALID_VALUE,
"`index` (%u) must be < MAX_VERTEX_ATTRIBS.", index);
return;
}
const auto buffer = state.mBoundBufferByTarget[LOCAL_GL_ARRAY_BUFFER];
if (!buffer && byteOffset) {
return EnqueueError(LOCAL_GL_INVALID_OPERATION,
"If ARRAY_BUFFER is null, byteOffset must be zero.");
}
Run<RPROC(VertexAttribPointer)>(index, desc);
list[index] = buffer;
}
// -------------------------------- Drawing -------------------------------
void ClientWebGLContext::DrawArraysInstanced(GLenum mode, GLint first,
GLsizei count, GLsizei primcount) {
Run<RPROC(DrawArraysInstanced)>(mode, first, count, primcount);
AfterDrawCall();
}
void ClientWebGLContext::DrawElementsInstanced(GLenum mode, GLsizei count,
GLenum type, WebGLintptr offset,
GLsizei primcount) {
Run<RPROC(DrawElementsInstanced)>(mode, count, type, offset, primcount);
AfterDrawCall();
}
// ------------------------------ Readback -------------------------------
void ClientWebGLContext::ReadPixels(GLint x, GLint y, GLsizei width,
GLsizei height, GLenum format, GLenum type,
WebGLsizeiptr offset,
dom::CallerType aCallerType,
ErrorResult& out_error) const {
const FuncScope funcScope(*this, "readPixels");
if (!ReadPixels_SharedPrecheck(aCallerType, out_error)) return;
const auto& state = State();
if (!ValidateNonNegative("width", width)) return;
if (!ValidateNonNegative("height", height)) return;
if (!ValidateNonNegative("offset", offset)) return;
const auto desc = webgl::ReadPixelsDesc{{x, y},
*uvec2::From(width, height),
{format, type},
state.mPixelPackState};
Run<RPROC(ReadPixelsPbo)>(desc, static_cast<uint64_t>(offset));
}
void ClientWebGLContext::ReadPixels(GLint x, GLint y, GLsizei width,
GLsizei height, GLenum format, GLenum type,
const dom::ArrayBufferView& dstData,
GLuint dstElemOffset,
dom::CallerType aCallerType,
ErrorResult& out_error) const {
const FuncScope funcScope(*this, "readPixels");
if (!ReadPixels_SharedPrecheck(aCallerType, out_error)) return;
const auto& state = State();
if (!ValidateNonNegative("width", width)) return;
if (!ValidateNonNegative("height", height)) return;
////
js::Scalar::Type reqScalarType;
if (!GetJSScalarFromGLType(type, &reqScalarType)) {
nsCString name;
WebGLContext::EnumName(type, &name);
EnqueueError(LOCAL_GL_INVALID_ENUM, "type: invalid enum value %s",
name.BeginReading());
return;
}
auto viewElemType = dstData.Type();
if (viewElemType == js::Scalar::Uint8Clamped) {
viewElemType = js::Scalar::Uint8;
}
if (viewElemType != reqScalarType) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"`pixels` type does not match `type`.");
return;
}
size_t elemSize = SizeOfViewElem(dstData);
dstData.ProcessFixedData([&](const Span<uint8_t>& aData) {
const auto& range = ValidateArrayBufferView(aData, elemSize, dstElemOffset,
0, LOCAL_GL_INVALID_VALUE);
if (!range) {
return;
}
const auto desc = webgl::ReadPixelsDesc{{x, y},
*uvec2::From(width, height),
{format, type},
state.mPixelPackState};
(void)DoReadPixels(desc, *range);
});
}
bool ClientWebGLContext::DoReadPixels(const webgl::ReadPixelsDesc& desc,
const Span<uint8_t> dest) const {
const auto notLost =
mNotLost; // Hold a strong-ref to prevent LoseContext=>UAF.
if (!notLost) return false;
const auto& inProcess = notLost->inProcess;
if (inProcess) {
inProcess->ReadPixelsInto(desc, dest);
return true;
}
const auto& child = notLost->outOfProcess;
child->FlushPendingCmds();
webgl::ReadPixelsResultIpc res = {};
if (!child->SendReadPixels(desc, dest.size(), &res)) {
res = {};
}
if (!res.byteStride || !res.shmem) return false;
const auto& byteStride = res.byteStride;
const auto& subrect = res.subrect;
const webgl::RaiiShmem shmem{child, res.shmem.ref()};
if (!shmem) {
EnqueueError(LOCAL_GL_OUT_OF_MEMORY, "Failed to map in back buffer.");
return false;
}
const auto& shmemBytes = Span{shmem.ByteRange()};
const auto pii = webgl::PackingInfoInfo::For(desc.pi);
if (!pii) {
gfxCriticalError() << "ReadPixels: Bad " << desc.pi;
return false;
}
const auto bpp = pii->BytesPerPixel();
const auto& packing = desc.packState;
auto packRect = *uvec2::From(subrect.x, subrect.y);
packRect.x += packing.skipPixels;
packRect.y += packing.skipRows;
const auto xByteSize = bpp * static_cast<uint32_t>(subrect.width);
const ptrdiff_t byteOffset = packRect.y * byteStride + packRect.x * bpp;
const auto srcSubrect = shmemBytes.subspan(byteOffset);
const auto destSubrect = dest.subspan(byteOffset);
for (const auto i : IntegerRange(subrect.height)) {
const auto srcRow = srcSubrect.subspan(i * byteStride, xByteSize);
const auto destRow = destSubrect.subspan(i * byteStride, xByteSize);
Memcpy(&destRow, srcRow);
}
return true;
}
bool ClientWebGLContext::ReadPixels_SharedPrecheck(
dom::CallerType aCallerType, ErrorResult& out_error) const {
if (IsContextLost()) return false;
if (mCanvasElement && mCanvasElement->IsWriteOnly() &&
aCallerType != dom::CallerType::System) {
JsWarning("readPixels: Not allowed");
out_error.Throw(NS_ERROR_DOM_SECURITY_ERR);
return false;
}
return true;
}
// --------------------------------- GL Query ---------------------------------
static inline GLenum QuerySlotTarget(const GLenum specificTarget) {
if (specificTarget == LOCAL_GL_ANY_SAMPLES_PASSED_CONSERVATIVE) {
return LOCAL_GL_ANY_SAMPLES_PASSED;
}
return specificTarget;
}
void ClientWebGLContext::GetQuery(JSContext* cx, GLenum specificTarget,
GLenum pname,
JS::MutableHandle<JS::Value> retval) const {
retval.set(JS::NullValue());
const FuncScope funcScope(*this, "getQuery");
if (IsContextLost()) return;
const auto& limits = Limits();
auto& state = State();
if (IsExtensionEnabled(WebGLExtensionID::EXT_disjoint_timer_query)) {
if (pname == LOCAL_GL_QUERY_COUNTER_BITS) {
switch (specificTarget) {
case LOCAL_GL_TIME_ELAPSED_EXT:
retval.set(JS::NumberValue(limits.queryCounterBitsTimeElapsed));
return;
case LOCAL_GL_TIMESTAMP_EXT:
retval.set(JS::NumberValue(limits.queryCounterBitsTimestamp));
return;
default:
EnqueueError_ArgEnum("target", specificTarget);
return;
}
}
}
if (pname != LOCAL_GL_CURRENT_QUERY) {
EnqueueError_ArgEnum("pname", pname);
return;
}
const auto slotTarget = QuerySlotTarget(specificTarget);
const auto& slot = MaybeFind(state.mCurrentQueryByTarget, slotTarget);
if (!slot) {
EnqueueError_ArgEnum("target", specificTarget);
return;
}
auto query = *slot;
if (query && query->mTarget != specificTarget) {
query = nullptr;
}
(void)ToJSValueOrNull(cx, query, retval);
}
void ClientWebGLContext::GetQueryParameter(
JSContext*, WebGLQueryJS& query, const GLenum pname,
JS::MutableHandle<JS::Value> retval) const {
retval.set(JS::NullValue());
const FuncScope funcScope(*this, "getQueryParameter");
if (IsContextLost()) return;
if (!query.ValidateUsable(*this, "query")) return;
auto maybe = [&]() {
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetQueryParameter(query.mId, pname);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
Maybe<double> ret;
if (!child->SendGetQueryParameter(query.mId, pname, &ret)) {
ret.reset();
}
return ret;
}();
if (!maybe) return;
// We must usually wait for an event loop before the query can be available.
const bool canBeAvailable =
(query.mCanBeAvailable || StaticPrefs::webgl_allow_immediate_queries());
if (!canBeAvailable) {
if (pname != LOCAL_GL_QUERY_RESULT_AVAILABLE) {
return;
}
maybe = Some(0.0);
}
switch (pname) {
case LOCAL_GL_QUERY_RESULT_AVAILABLE:
retval.set(JS::BooleanValue(*maybe));
break;
default:
retval.set(JS::NumberValue(*maybe));
break;
}
}
void ClientWebGLContext::BeginQuery(const GLenum specificTarget,
WebGLQueryJS& query) {
const FuncScope funcScope(*this, "beginQuery");
if (IsContextLost()) return;
if (!query.ValidateUsable(*this, "query")) return;
auto& state = State();
const auto slotTarget = QuerySlotTarget(specificTarget);
const auto& slot = MaybeFind(state.mCurrentQueryByTarget, slotTarget);
if (!slot) {
EnqueueError_ArgEnum("target", specificTarget);
return;
}
if (*slot) {
auto enumStr = EnumString(slotTarget);
if (slotTarget == LOCAL_GL_ANY_SAMPLES_PASSED) {
enumStr += "/ANY_SAMPLES_PASSED_CONSERVATIVE";
}
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"A Query is already active for %s.", enumStr.c_str());
return;
}
if (query.mTarget && query.mTarget != specificTarget) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"`query` cannot be changed to a different target.");
return;
}
*slot = &query;
query.mTarget = specificTarget;
Run<RPROC(BeginQuery)>(specificTarget, query.mId);
}
void ClientWebGLContext::EndQuery(const GLenum specificTarget) {
const FuncScope funcScope(*this, "endQuery");
if (IsContextLost()) return;
auto& state = State();
const auto slotTarget = QuerySlotTarget(specificTarget);
const auto& maybeSlot = MaybeFind(state.mCurrentQueryByTarget, slotTarget);
if (!maybeSlot) {
EnqueueError_ArgEnum("target", specificTarget);
return;
}
auto& slot = *maybeSlot;
if (!slot || slot->mTarget != specificTarget) {
EnqueueError(LOCAL_GL_INVALID_OPERATION, "No Query is active for %s.",
EnumString(specificTarget).c_str());
return;
}
const auto query = slot;
slot = nullptr;
Run<RPROC(EndQuery)>(specificTarget);
auto& availRunnable = EnsureAvailabilityRunnable();
availRunnable.mQueries.push_back(query.get());
query->mCanBeAvailable = false;
}
void ClientWebGLContext::QueryCounter(WebGLQueryJS& query,
const GLenum target) const {
const FuncScope funcScope(*this, "queryCounter");
if (IsContextLost()) return;
if (!query.ValidateUsable(*this, "query")) return;
if (target != LOCAL_GL_TIMESTAMP) {
EnqueueError(LOCAL_GL_INVALID_ENUM, "`target` must be TIMESTAMP.");
return;
}
if (query.mTarget && query.mTarget != target) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"`query` cannot be changed to a different target.");
return;
}
query.mTarget = target;
Run<RPROC(QueryCounter)>(query.mId);
auto& availRunnable = EnsureAvailabilityRunnable();
availRunnable.mQueries.push_back(&query);
query.mCanBeAvailable = false;
}
// -------------------------------- Sampler -------------------------------
void ClientWebGLContext::GetSamplerParameter(
JSContext* cx, const WebGLSamplerJS& sampler, const GLenum pname,
JS::MutableHandle<JS::Value> retval) const {
retval.set(JS::NullValue());
const FuncScope funcScope(*this, "getSamplerParameter");
if (IsContextLost()) return;
if (!sampler.ValidateUsable(*this, "sampler")) return;
const auto maybe = [&]() {
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetSamplerParameter(sampler.mId, pname);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
Maybe<double> ret;
if (!child->SendGetSamplerParameter(sampler.mId, pname, &ret)) {
ret.reset();
}
return ret;
}();
if (maybe) {
retval.set(JS::NumberValue(*maybe));
}
}
void ClientWebGLContext::BindSampler(const GLuint unit,
WebGLSamplerJS* const sampler) {
const FuncScope funcScope(*this, "bindSampler");
if (IsContextLost()) return;
if (sampler && !sampler->ValidateUsable(*this, "sampler")) return;
auto& state = State();
auto& texUnits = state.mTexUnits;
if (unit >= texUnits.size()) {
EnqueueError(LOCAL_GL_INVALID_VALUE, "`unit` (%u) larger than %zu.", unit,
texUnits.size());
return;
}
// -
texUnits[unit].sampler = sampler;
Run<RPROC(BindSampler)>(unit, sampler ? sampler->mId : 0);
}
void ClientWebGLContext::SamplerParameteri(WebGLSamplerJS& sampler,
const GLenum pname,
const GLint param) const {
const FuncScope funcScope(*this, "samplerParameteri");
if (IsContextLost()) return;
if (!sampler.ValidateUsable(*this, "sampler")) return;
Run<RPROC(SamplerParameteri)>(sampler.mId, pname, param);
}
void ClientWebGLContext::SamplerParameterf(WebGLSamplerJS& sampler,
const GLenum pname,
const GLfloat param) const {
const FuncScope funcScope(*this, "samplerParameterf");
if (IsContextLost()) return;
if (!sampler.ValidateUsable(*this, "sampler")) return;
Run<RPROC(SamplerParameterf)>(sampler.mId, pname, param);
}
// ------------------------------- GL Sync ---------------------------------
void ClientWebGLContext::GetSyncParameter(
JSContext* const cx, WebGLSyncJS& sync, const GLenum pname,
JS::MutableHandle<JS::Value> retval) const {
retval.set(JS::NullValue());
const FuncScope funcScope(*this, "getSyncParameter");
if (IsContextLost()) return;
if (!sync.ValidateUsable(*this, "sync")) return;
retval.set([&]() -> JS::Value {
switch (pname) {
case LOCAL_GL_OBJECT_TYPE:
return JS::NumberValue(LOCAL_GL_SYNC_FENCE);
case LOCAL_GL_SYNC_CONDITION:
return JS::NumberValue(LOCAL_GL_SYNC_GPU_COMMANDS_COMPLETE);
case LOCAL_GL_SYNC_FLAGS:
return JS::NumberValue(0);
case LOCAL_GL_SYNC_STATUS: {
const auto res = ClientWaitSync(sync, 0, 0);
const auto signaled = (res == LOCAL_GL_ALREADY_SIGNALED ||
res == LOCAL_GL_CONDITION_SATISFIED);
return JS::NumberValue(signaled ? LOCAL_GL_SIGNALED
: LOCAL_GL_UNSIGNALED);
}
default:
EnqueueError_ArgEnum("pname", pname);
return JS::NullValue();
}
}());
}
// -
GLenum ClientWebGLContext::ClientWaitSync(WebGLSyncJS& sync,
const GLbitfield flags,
const GLuint64 timeout) const {
const FuncScope funcScope(*this, "clientWaitSync");
if (IsContextLost()) return LOCAL_GL_WAIT_FAILED;
if (!sync.ValidateUsable(*this, "sync")) return LOCAL_GL_WAIT_FAILED;
static constexpr auto VALID_BITS = LOCAL_GL_SYNC_FLUSH_COMMANDS_BIT;
if ((flags | VALID_BITS) != VALID_BITS) {
EnqueueError(LOCAL_GL_INVALID_VALUE,
"`flags` must be SYNC_FLUSH_COMMANDS_BIT or 0.");
return LOCAL_GL_WAIT_FAILED;
}
if (timeout > webgl::kMaxClientWaitSyncTimeoutNS) {
EnqueueError(
LOCAL_GL_INVALID_OPERATION,
"`timeout` (%sns) must be less than MAX_CLIENT_WAIT_TIMEOUT_WEBGL "
"(%sns).",
ToStringWithCommas(timeout).c_str(),
ToStringWithCommas(webgl::kMaxClientWaitSyncTimeoutNS).c_str());
return LOCAL_GL_WAIT_FAILED;
}
const bool canBeAvailable =
(sync.mCanBeAvailable || StaticPrefs::webgl_allow_immediate_queries());
if (!canBeAvailable) {
constexpr uint8_t WARN_AT = 100;
if (sync.mNumQueriesBeforeFirstFrameBoundary <= WARN_AT) {
sync.mNumQueriesBeforeFirstFrameBoundary += 1;
if (sync.mNumQueriesBeforeFirstFrameBoundary == WARN_AT) {
EnqueueWarning(
"ClientWaitSync must return TIMEOUT_EXPIRED until control has"
" returned to the user agent's main loop, but was polled %hhu "
"times. Are you spin-locking? (only warns once)",
sync.mNumQueriesBeforeFirstFrameBoundary);
}
}
return LOCAL_GL_TIMEOUT_EXPIRED;
}
if (mCompletedSyncId >= sync.mId) {
return LOCAL_GL_ALREADY_SIGNALED;
}
if (flags & LOCAL_GL_SYNC_FLUSH_COMMANDS_BIT) {
Flush();
} else {
constexpr uint8_t WARN_AT = 100;
if (sync.mNumQueriesWithoutFlushCommandsBit <= WARN_AT) {
sync.mNumQueriesWithoutFlushCommandsBit += 1;
if (sync.mNumQueriesWithoutFlushCommandsBit == WARN_AT) {
EnqueueWarning(
"ClientWaitSync with timeout=0 (or GetSyncParameter(SYNC_STATUS)) "
"called %hhu times without SYNC_FLUSH_COMMANDS_BIT. If you do not "
"flush, this sync object is not guaranteed to ever complete.",
sync.mNumQueriesWithoutFlushCommandsBit);
}
}
}
if (!timeout) return LOCAL_GL_TIMEOUT_EXPIRED;
// -
// Fine, time to block:
const auto ret = [&]() {
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->ClientWaitSync(sync.mId, flags, timeout);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
GLenum ret = {};
if (!child->SendClientWaitSync(sync.mId, flags, timeout, &ret)) {
ret = {};
}
return ret;
}();
switch (ret) {
case LOCAL_GL_CONDITION_SATISFIED:
case LOCAL_GL_ALREADY_SIGNALED:
OnSyncComplete(sync.mId);
break;
}
return ret;
}
void ClientWebGLContext::WaitSync(const WebGLSyncJS& sync,
const GLbitfield flags,
const GLint64 timeout) const {
const FuncScope funcScope(*this, "waitSync");
if (IsContextLost()) return;
if (!sync.ValidateUsable(*this, "sync")) return;
if (flags != 0) {
EnqueueError(LOCAL_GL_INVALID_VALUE, "`flags` must be 0.");
return;
}
if (timeout != -1) {
EnqueueError(LOCAL_GL_INVALID_VALUE, "`timeout` must be TIMEOUT_IGNORED.");
return;
}
JsWarning("waitSync is a no-op.");
}
// -------------------------- Transform Feedback ---------------------------
void ClientWebGLContext::BindTransformFeedback(
const GLenum target, WebGLTransformFeedbackJS* const tf) {
const FuncScope funcScope(*this, "bindTransformFeedback");
if (IsContextLost()) return;
if (tf && !tf->ValidateUsable(*this, "tf")) return;
auto& state = State();
if (target != LOCAL_GL_TRANSFORM_FEEDBACK) {
EnqueueError(LOCAL_GL_INVALID_ENUM, "`target` must be TRANSFORM_FEEDBACK.");
return;
}
if (state.mTfActiveAndNotPaused) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Current Transform Feedback object is active and not paused.");
return;
}
if (tf) {
tf->mHasBeenBound = true;
state.mBoundTfo = tf;
} else {
state.mBoundTfo = state.mDefaultTfo;
}
Run<RPROC(BindTransformFeedback)>(tf ? tf->mId : 0);
}
void ClientWebGLContext::BeginTransformFeedback(const GLenum primMode) {
const FuncScope funcScope(*this, "beginTransformFeedback");
if (IsContextLost()) return;
auto& state = State();
auto& tfo = *(state.mBoundTfo);
if (tfo.mActiveOrPaused) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Transform Feedback is already active or paused.");
return;
}
MOZ_ASSERT(!state.mTfActiveAndNotPaused);
auto& prog = state.mCurrentProgram;
if (!prog) {
EnqueueError(LOCAL_GL_INVALID_OPERATION, "No program in use.");
return;
}
const auto& linkResult = GetLinkResult(*prog);
if (!linkResult.success) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Program is not successfully linked.");
return;
}
auto tfBufferCount = linkResult.active.activeTfVaryings.size();
if (tfBufferCount &&
linkResult.tfBufferMode == LOCAL_GL_INTERLEAVED_ATTRIBS) {
tfBufferCount = 1;
}
if (!tfBufferCount) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Program does not use Transform Feedback.");
return;
}
const auto& buffers = tfo.mAttribBuffers;
for (const auto i : IntegerRange(tfBufferCount)) {
if (!buffers[i]) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Transform Feedback buffer %u is null.", i);
return;
}
}
switch (primMode) {
case LOCAL_GL_POINTS:
case LOCAL_GL_LINES:
case LOCAL_GL_TRIANGLES:
break;
default:
EnqueueError(LOCAL_GL_INVALID_ENUM,
"`primitiveMode` must be POINTS, LINES< or TRIANGLES.");
return;
}
// -
tfo.mActiveOrPaused = true;
tfo.mActiveProgram = prog;
tfo.mActiveProgramKeepAlive = prog->mKeepAliveWeak.lock();
prog->mActiveTfos.insert(&tfo);
state.mTfActiveAndNotPaused = true;
Run<RPROC(BeginTransformFeedback)>(primMode);
}
void ClientWebGLContext::EndTransformFeedback() {
const FuncScope funcScope(*this, "endTransformFeedback");
if (IsContextLost()) return;
auto& state = State();
auto& tfo = *(state.mBoundTfo);
if (!tfo.mActiveOrPaused) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Transform Feedback is not active or paused.");
return;
}
tfo.mActiveOrPaused = false;
tfo.mActiveProgram->mActiveTfos.erase(&tfo);
tfo.mActiveProgram = nullptr;
tfo.mActiveProgramKeepAlive = nullptr;
state.mTfActiveAndNotPaused = false;
Run<RPROC(EndTransformFeedback)>();
}
void ClientWebGLContext::PauseTransformFeedback() {
const FuncScope funcScope(*this, "pauseTransformFeedback");
if (IsContextLost()) return;
auto& state = State();
auto& tfo = *(state.mBoundTfo);
if (!tfo.mActiveOrPaused) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Transform Feedback is not active.");
return;
}
if (!state.mTfActiveAndNotPaused) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Transform Feedback is already paused.");
return;
}
state.mTfActiveAndNotPaused = false;
Run<RPROC(PauseTransformFeedback)>();
}
void ClientWebGLContext::ResumeTransformFeedback() {
const FuncScope funcScope(*this, "resumeTransformFeedback");
if (IsContextLost()) return;
auto& state = State();
auto& tfo = *(state.mBoundTfo);
if (!tfo.mActiveOrPaused) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Transform Feedback is not active and paused.");
return;
}
if (state.mTfActiveAndNotPaused) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Transform Feedback is not paused.");
return;
}
if (state.mCurrentProgram != tfo.mActiveProgram) {
EnqueueError(
LOCAL_GL_INVALID_OPERATION,
"Cannot Resume Transform Feedback with a program link result different"
" from when Begin was called.");
return;
}
state.mTfActiveAndNotPaused = true;
Run<RPROC(ResumeTransformFeedback)>();
}
void ClientWebGLContext::SetFramebufferIsInOpaqueRAF(WebGLFramebufferJS* fb,
bool value) {
fb->mInOpaqueRAF = value;
Run<RPROC(SetFramebufferIsInOpaqueRAF)>(fb->mId, value);
}
// ---------------------------- Misc Extensions ----------------------------
void ClientWebGLContext::DrawBuffers(const dom::Sequence<GLenum>& buffers) {
const auto range = MakeRange(buffers);
const auto vec = std::vector<GLenum>(range.begin().get(), range.end().get());
Run<RPROC(DrawBuffers)>(vec);
}
void ClientWebGLContext::EnqueueErrorImpl(const GLenum error,
const nsACString& text) const {
if (!mNotLost) return; // Ignored if context is lost.
AutoEnqueueFlush();
Run<RPROC(GenerateError)>(error, ToString(text));
}
void ClientWebGLContext::RequestExtension(const WebGLExtensionID ext) const {
Run<RPROC(RequestExtension)>(ext);
}
// -
bool ClientWebGLContext::IsExtensionForbiddenForCaller(
const WebGLExtensionID ext, const dom::CallerType callerType) const {
if (callerType == dom::CallerType::System) {
return false;
}
if (StaticPrefs::webgl_enable_privileged_extensions()) {
return false;
}
switch (ext) {
case WebGLExtensionID::MOZ_debug:
return true;
case WebGLExtensionID::WEBGL_debug_renderer_info:
return ShouldResistFingerprinting(RFPTarget::WebGLRenderInfo) ||
!StaticPrefs::webgl_enable_debug_renderer_info();
case WebGLExtensionID::WEBGL_debug_shaders:
return ShouldResistFingerprinting(RFPTarget::WebGLRenderInfo);
default:
return false;
}
}
bool ClientWebGLContext::IsSupported(const WebGLExtensionID ext,
const dom::CallerType callerType) const {
if (IsExtensionForbiddenForCaller(ext, callerType)) {
return false;
}
const auto& limits = Limits();
return limits.supportedExtensions[ext];
}
void ClientWebGLContext::GetSupportedExtensions(
dom::Nullable<nsTArray<nsString>>& retval,
const dom::CallerType callerType) const {
retval.SetNull();
if (!mNotLost) return;
auto& retarr = retval.SetValue();
for (const auto i : MakeEnumeratedRange(WebGLExtensionID::Max)) {
if (!IsSupported(i, callerType)) continue;
const auto& extStr = GetExtensionName(i);
retarr.AppendElement(NS_ConvertUTF8toUTF16(extStr));
}
}
// -
void ClientWebGLContext::GetSupportedProfilesASTC(
dom::Nullable<nsTArray<nsString>>& retval) const {
retval.SetNull();
if (!mNotLost) return;
const auto& limits = Limits();
auto& retarr = retval.SetValue();
retarr.AppendElement(u"ldr"_ns);
if (limits.astcHdr) {
retarr.AppendElement(u"hdr"_ns);
}
}
void ClientWebGLContext::ProvokingVertex(const GLenum rawMode) const {
const FuncScope funcScope(*this, "provokingVertex");
if (IsContextLost()) return;
const auto mode = webgl::AsEnumCase<webgl::ProvokingVertex>(rawMode);
if (!mode) {
EnqueueError_ArgEnum("mode", rawMode);
return;
}
Run<RPROC(ProvokingVertex)>(*mode);
funcScope.mKeepNotLostOrNull->state.mProvokingVertex = *mode;
}
// -
uint32_t ClientWebGLContext::GetPrincipalHashValue() const {
if (mCanvasElement) {
return mCanvasElement->NodePrincipal()->GetHashValue();
}
if (mOffscreenCanvas) {
nsIGlobalObject* global = mOffscreenCanvas->GetOwnerGlobal();
if (global) {
nsIPrincipal* principal = global->PrincipalOrNull();
if (principal) {
return principal->GetHashValue();
}
}
}
return 0;
}
// ---------------------------
void ClientWebGLContext::EnqueueError_ArgEnum(const char* const argName,
const GLenum val) const {
EnqueueError(LOCAL_GL_INVALID_ENUM, "Bad `%s`: 0x%04x", argName, val);
}
// -
// WebGLProgramJS
void ClientWebGLContext::AttachShader(WebGLProgramJS& prog,
WebGLShaderJS& shader) const {
const FuncScope funcScope(*this, "attachShader");
if (IsContextLost()) return;
if (!prog.ValidateUsable(*this, "program")) return;
if (!shader.ValidateUsable(*this, "shader")) return;
auto& slot = *MaybeFind(prog.mNextLink_Shaders, shader.mType);
if (slot.shader) {
if (&shader == slot.shader) {
EnqueueError(LOCAL_GL_INVALID_OPERATION, "`shader` is already attached.");
} else {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Only one of each type of"
" shader may be attached to a program.");
}
return;
}
slot = {&shader, shader.mKeepAliveWeak.lock()};
Run<RPROC(AttachShader)>(prog.mId, shader.mId);
}
void ClientWebGLContext::BindAttribLocation(WebGLProgramJS& prog,
const GLuint location,
const nsAString& name) const {
const FuncScope funcScope(*this, "bindAttribLocation");
if (IsContextLost()) return;
if (!prog.ValidateUsable(*this, "program")) return;
const auto& nameU8 = ToString(NS_ConvertUTF16toUTF8(name));
Run<RPROC(BindAttribLocation)>(prog.mId, location, nameU8);
}
void ClientWebGLContext::DetachShader(WebGLProgramJS& prog,
const WebGLShaderJS& shader) const {
const FuncScope funcScope(*this, "detachShader");
if (IsContextLost()) return;
if (!prog.ValidateUsable(*this, "program")) return;
if (!shader.ValidateUsable(*this, "shader")) return;
auto& slot = *MaybeFind(prog.mNextLink_Shaders, shader.mType);
if (slot.shader != &shader) {
EnqueueError(LOCAL_GL_INVALID_OPERATION, "`shader` is not attached.");
return;
}
slot = {};
Run<RPROC(DetachShader)>(prog.mId, shader.mId);
}
void ClientWebGLContext::GetAttachedShaders(
const WebGLProgramJS& prog,
dom::Nullable<nsTArray<RefPtr<WebGLShaderJS>>>& retval) const {
const FuncScope funcScope(*this, "getAttachedShaders");
if (IsContextLost()) return;
if (!prog.ValidateUsable(*this, "program")) return;
auto& arr = retval.SetValue();
for (const auto& pair : prog.mNextLink_Shaders) {
const auto& attachment = pair.second;
if (!attachment.shader) continue;
arr.AppendElement(attachment.shader);
}
}
void ClientWebGLContext::LinkProgram(WebGLProgramJS& prog) const {
const FuncScope funcScope(*this, "linkProgram");
if (IsContextLost()) return;
if (!prog.ValidateUsable(*this, "program")) return;
if (!prog.mActiveTfos.empty()) {
EnqueueError(LOCAL_GL_INVALID_OPERATION,
"Program still in use by active or paused"
" Transform Feedback objects.");
return;
}
prog.mResult = std::make_shared<webgl::LinkResult>();
prog.mUniformLocByName = Nothing();
prog.mUniformBlockBindings = {};
Run<RPROC(LinkProgram)>(prog.mId);
}
void ClientWebGLContext::TransformFeedbackVaryings(
WebGLProgramJS& prog, const dom::Sequence<nsString>& varyings,
const GLenum bufferMode) const {
const FuncScope funcScope(*this, "transformFeedbackVaryings");
if (IsContextLost()) return;
if (!prog.ValidateUsable(*this, "program")) return;
std::vector<std::string> varyingsU8;
varyingsU8.reserve(varyings.Length());
for (const auto& cur : varyings) {
const auto curU8 = ToString(NS_ConvertUTF16toUTF8(cur));
varyingsU8.push_back(curU8);
}
Run<RPROC(TransformFeedbackVaryings)>(prog.mId, varyingsU8, bufferMode);
}
void ClientWebGLContext::UniformBlockBinding(WebGLProgramJS& prog,
const GLuint blockIndex,
const GLuint blockBinding) const {
const FuncScope funcScope(*this, "uniformBlockBinding");
if (IsContextLost()) return;
if (!prog.ValidateUsable(*this, "program")) return;
const auto& state = State();
(void)GetLinkResult(prog);
auto& list = prog.mUniformBlockBindings;
if (blockIndex >= list.size()) {
EnqueueError(
LOCAL_GL_INVALID_VALUE,
"`blockIndex` (%u) must be less than ACTIVE_UNIFORM_BLOCKS (%zu).",
blockIndex, list.size());
return;
}
if (blockBinding >= state.mBoundUbos.size()) {
EnqueueError(LOCAL_GL_INVALID_VALUE,
"`blockBinding` (%u) must be less than "
"MAX_UNIFORM_BUFFER_BINDINGS (%zu).",
blockBinding, state.mBoundUbos.size());
return;
}
list[blockIndex] = blockBinding;
Run<RPROC(UniformBlockBinding)>(prog.mId, blockIndex, blockBinding);
}
// WebGLProgramJS link result reflection
already_AddRefed<WebGLActiveInfoJS> ClientWebGLContext::GetActiveAttrib(
const WebGLProgramJS& prog, const GLuint index) {
const FuncScope funcScope(*this, "getActiveAttrib");
if (IsContextLost()) return nullptr;
if (!prog.ValidateUsable(*this, "program")) return nullptr;
const auto& res = GetLinkResult(prog);
const auto& list = res.active.activeAttribs;
if (index >= list.size()) {
EnqueueError(LOCAL_GL_INVALID_VALUE, "`index` too large.");
return nullptr;
}
const auto& info = list[index];
return AsAddRefed(new WebGLActiveInfoJS(info));
}
already_AddRefed<WebGLActiveInfoJS> ClientWebGLContext::GetActiveUniform(
const WebGLProgramJS& prog, const GLuint index) {
const FuncScope funcScope(*this, "getActiveUniform");
if (IsContextLost()) return nullptr;
if (!prog.ValidateUsable(*this, "program")) return nullptr;
const auto& res = GetLinkResult(prog);
const auto& list = res.active.activeUniforms;
if (index >= list.size()) {
EnqueueError(LOCAL_GL_INVALID_VALUE, "`index` too large.");
return nullptr;
}
const auto& info = list[index];
return AsAddRefed(new WebGLActiveInfoJS(info));
}
void ClientWebGLContext::GetActiveUniformBlockName(const WebGLProgramJS& prog,
const GLuint index,
nsAString& retval) const {
retval.SetIsVoid(true);
const FuncScope funcScope(*this, "getActiveUniformBlockName");
if (IsContextLost()) return;
if (!prog.ValidateUsable(*this, "program")) return;
const auto& res = GetLinkResult(prog);
if (!res.success) {
EnqueueError(LOCAL_GL_INVALID_OPERATION, "Program has not been linked.");
return;
}
const auto& list = res.active.activeUniformBlocks;
if (index >= list.size()) {
EnqueueError(LOCAL_GL_INVALID_VALUE, "`index` too large.");
return;
}
const auto& block = list[index];
CopyUTF8toUTF16(block.name, retval);
}
void ClientWebGLContext::GetActiveUniformBlockParameter(
JSContext* const cx, const WebGLProgramJS& prog, const GLuint index,
const GLenum pname, JS::MutableHandle<JS::Value> retval, ErrorResult& rv) {
retval.set(JS::NullValue());
const FuncScope funcScope(*this, "getActiveUniformBlockParameter");
if (IsContextLost()) return;
if (!prog.ValidateUsable(*this, "program")) return;
const auto& res = GetLinkResult(prog);
const auto& list = res.active.activeUniformBlocks;
if (index >= list.size()) {
EnqueueError(LOCAL_GL_INVALID_VALUE, "`index` too large.");
return;
}
const auto& block = list[index];
retval.set([&]() -> JS::Value {
switch (pname) {
case LOCAL_GL_UNIFORM_BLOCK_BINDING:
return JS::NumberValue(prog.mUniformBlockBindings[index]);
case LOCAL_GL_UNIFORM_BLOCK_DATA_SIZE:
return JS::NumberValue(block.dataSize);
case LOCAL_GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS:
return JS::NumberValue(block.activeUniformIndices.size());
case LOCAL_GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES: {
const auto& indices = block.activeUniformIndices;
return Create<dom::Uint32Array>(cx, this, indices, rv);
}
case LOCAL_GL_UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER:
return JS::BooleanValue(block.referencedByVertexShader);
case LOCAL_GL_UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER:
return JS::BooleanValue(block.referencedByFragmentShader);
default:
EnqueueError_ArgEnum("pname", pname);
return JS::NullValue();
}
}());
}
void ClientWebGLContext::GetActiveUniforms(
JSContext* const cx, const WebGLProgramJS& prog,
const dom::Sequence<GLuint>& uniformIndices, const GLenum pname,
JS::MutableHandle<JS::Value> retval) const {
retval.set(JS::NullValue());
const FuncScope funcScope(*this, "getActiveUniforms");
if (IsContextLost()) return;
if (!prog.ValidateUsable(*this, "program")) return;
const auto& res = GetLinkResult(prog);
const auto& list = res.active.activeUniforms;
const auto count = uniformIndices.Length();
JS::Rooted<JSObject*> array(cx, JS::NewArrayObject(cx, count));
if (!array) return; // Just bail.
for (const auto i : IntegerRange(count)) {
const auto index = uniformIndices[i];
if (index >= list.size()) {
EnqueueError(LOCAL_GL_INVALID_VALUE,
"`uniformIndices[%u]`: `%u` too large.", i, index);
return;
}
const auto& uniform = list[index];
JS::Rooted<JS::Value> value(cx);
switch (pname) {
case LOCAL_GL_UNIFORM_TYPE:
value = JS::NumberValue(uniform.elemType);
break;
case LOCAL_GL_UNIFORM_SIZE:
value = JS::NumberValue(uniform.elemCount);
break;
case LOCAL_GL_UNIFORM_BLOCK_INDEX:
value = JS::NumberValue(uniform.block_index);
break;
case LOCAL_GL_UNIFORM_OFFSET:
value = JS::NumberValue(uniform.block_offset);
break;
case LOCAL_GL_UNIFORM_ARRAY_STRIDE:
value = JS::NumberValue(uniform.block_arrayStride);
break;
case LOCAL_GL_UNIFORM_MATRIX_STRIDE:
value = JS::NumberValue(uniform.block_matrixStride);
break;
case LOCAL_GL_UNIFORM_IS_ROW_MAJOR:
value = JS::BooleanValue(uniform.block_isRowMajor);
break;
default:
EnqueueError_ArgEnum("pname", pname);
return;
}
if (!JS_DefineElement(cx, array, i, value, JSPROP_ENUMERATE)) return;
}
retval.setObject(*array);
}
already_AddRefed<WebGLActiveInfoJS>
ClientWebGLContext::GetTransformFeedbackVarying(const WebGLProgramJS& prog,
const GLuint index) {
const FuncScope funcScope(*this, "getTransformFeedbackVarying");
if (IsContextLost()) return nullptr;
if (!prog.ValidateUsable(*this, "program")) return nullptr;
const auto& res = GetLinkResult(prog);
const auto& list = res.active.activeTfVaryings;
if (index >= list.size()) {
EnqueueError(LOCAL_GL_INVALID_VALUE, "`index` too large.");
return nullptr;
}
const auto& info = list[index];
return AsAddRefed(new WebGLActiveInfoJS(info));
}
GLint ClientWebGLContext::GetAttribLocation(const WebGLProgramJS& prog,
const nsAString& name) const {
const FuncScope funcScope(*this, "getAttribLocation");
if (IsContextLost()) return -1;
if (!prog.ValidateUsable(*this, "program")) return -1;
const auto nameU8 = ToString(NS_ConvertUTF16toUTF8(name));
const auto& res = GetLinkResult(prog);
for (const auto& cur : res.active.activeAttribs) {
if (cur.name == nameU8) return cur.location;
}
const auto err = CheckGLSLVariableName(mIsWebGL2, nameU8);
if (err) {
EnqueueError(err->type, "%s", err->info.c_str());
}
return -1;
}
GLint ClientWebGLContext::GetFragDataLocation(const WebGLProgramJS& prog,
const nsAString& name) const {
const FuncScope funcScope(*this, "getFragDataLocation");
if (IsContextLost()) return -1;
if (!prog.ValidateUsable(*this, "program")) return -1;
const auto nameU8 = ToString(NS_ConvertUTF16toUTF8(name));
const auto err = CheckGLSLVariableName(mIsWebGL2, nameU8);
if (err) {
EnqueueError(*err);
return -1;
}
return [&]() {
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetFragDataLocation(prog.mId, nameU8);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
GLint ret = {};
if (!child->SendGetFragDataLocation(prog.mId, nameU8, &ret)) {
ret = {};
}
return ret;
}();
}
GLuint ClientWebGLContext::GetUniformBlockIndex(
const WebGLProgramJS& prog, const nsAString& blockName) const {
const FuncScope funcScope(*this, "getUniformBlockIndex");
if (IsContextLost()) return LOCAL_GL_INVALID_INDEX;
if (!prog.ValidateUsable(*this, "program")) return LOCAL_GL_INVALID_INDEX;
const auto nameU8 = ToString(NS_ConvertUTF16toUTF8(blockName));
const auto& res = GetLinkResult(prog);
const auto& list = res.active.activeUniformBlocks;
for (const auto i : IntegerRange(list.size())) {
const auto& cur = list[i];
if (cur.name == nameU8) {
return i;
}
}
return LOCAL_GL_INVALID_INDEX;
}
void ClientWebGLContext::GetUniformIndices(
const WebGLProgramJS& prog, const dom::Sequence<nsString>& uniformNames,
dom::Nullable<nsTArray<GLuint>>& retval) const {
const FuncScope funcScope(*this, "getUniformIndices");
if (IsContextLost()) return;
if (!prog.ValidateUsable(*this, "program")) return;
const auto& res = GetLinkResult(prog);
auto ret = nsTArray<GLuint>(uniformNames.Length());
for (const auto& queriedNameU16 : uniformNames) {
const auto queriedName = ToString(NS_ConvertUTF16toUTF8(queriedNameU16));
const auto impliedProperArrayQueriedName = queriedName + "[0]";
GLuint activeId = LOCAL_GL_INVALID_INDEX;
for (const auto i : IntegerRange(res.active.activeUniforms.size())) {
// O(N^2) ok for small N.
const auto& activeInfoForI = res.active.activeUniforms[i];
if (queriedName == activeInfoForI.name ||
impliedProperArrayQueriedName == activeInfoForI.name) {
activeId = i;
break;
}
}
ret.AppendElement(activeId);
}
retval.SetValue(std::move(ret));
}
already_AddRefed<WebGLUniformLocationJS> ClientWebGLContext::GetUniformLocation(
const WebGLProgramJS& prog, const nsAString& name) const {
const FuncScope funcScope(*this, "getUniformLocation");
if (IsContextLost()) return nullptr;
if (!prog.ValidateUsable(*this, "program")) return nullptr;
const auto& res = GetLinkResult(prog);
if (!prog.mUniformLocByName) {
// Cache a map from name->location.
// Since the only way to set uniforms requires calling GetUniformLocation,
// we expect apps to query most active uniforms once for each scalar or
// array. NB: Uniform array setters do have overflow semantics, even though
// uniform locations aren't guaranteed contiguous, but GetUniformLocation
// must still be called once per array.
prog.mUniformLocByName.emplace();
for (const auto& activeUniform : res.active.activeUniforms) {
if (activeUniform.block_index != -1) continue;
auto locName = activeUniform.name;
const auto indexed = webgl::ParseIndexed(locName);
if (indexed) {
locName = indexed->name;
}
const auto err = CheckGLSLVariableName(mIsWebGL2, locName);
if (err) continue;
const auto baseLength = locName.size();
for (const auto& pair : activeUniform.locByIndex) {
if (indexed) {
locName.erase(baseLength); // Erase previous "[N]".
locName += '[';
locName += std::to_string(pair.first);
locName += ']';
}
const auto locInfo =
WebGLProgramJS::UniformLocInfo{pair.second, activeUniform.elemType};
prog.mUniformLocByName->insert({locName, locInfo});
}
}
}
const auto& locByName = *(prog.mUniformLocByName);
const auto nameU8 = ToString(NS_ConvertUTF16toUTF8(name));
auto loc = MaybeFind(locByName, nameU8);
if (!loc) {
loc = MaybeFind(locByName, nameU8 + "[0]");
}
if (!loc) {
const auto err = CheckGLSLVariableName(mIsWebGL2, nameU8);
if (err) {
EnqueueError(err->type, "%s", err->info.c_str());
}
return nullptr;
}
return AsAddRefed(new WebGLUniformLocationJS(*this, prog.mResult,
loc->location, loc->elemType));
}
std::array<uint16_t, 3> ValidUploadElemTypes(const GLenum elemType) {
std::vector<GLenum> ret;
switch (elemType) {
case LOCAL_GL_BOOL:
ret = {LOCAL_GL_FLOAT, LOCAL_GL_INT, LOCAL_GL_UNSIGNED_INT};
break;
case LOCAL_GL_BOOL_VEC2:
ret = {LOCAL_GL_FLOAT_VEC2, LOCAL_GL_INT_VEC2,
LOCAL_GL_UNSIGNED_INT_VEC2};
break;
case LOCAL_GL_BOOL_VEC3:
ret = {LOCAL_GL_FLOAT_VEC3, LOCAL_GL_INT_VEC3,
LOCAL_GL_UNSIGNED_INT_VEC3};
break;
case LOCAL_GL_BOOL_VEC4:
ret = {LOCAL_GL_FLOAT_VEC4, LOCAL_GL_INT_VEC4,
LOCAL_GL_UNSIGNED_INT_VEC4};
break;
case LOCAL_GL_SAMPLER_2D:
case LOCAL_GL_SAMPLER_3D:
case LOCAL_GL_SAMPLER_CUBE:
case LOCAL_GL_SAMPLER_2D_SHADOW:
case LOCAL_GL_SAMPLER_2D_ARRAY:
case LOCAL_GL_SAMPLER_2D_ARRAY_SHADOW:
case LOCAL_GL_SAMPLER_CUBE_SHADOW:
case LOCAL_GL_INT_SAMPLER_2D:
case LOCAL_GL_INT_SAMPLER_3D:
case LOCAL_GL_INT_SAMPLER_CUBE:
case LOCAL_GL_INT_SAMPLER_2D_ARRAY:
case LOCAL_GL_UNSIGNED_INT_SAMPLER_2D:
case LOCAL_GL_UNSIGNED_INT_SAMPLER_3D:
case LOCAL_GL_UNSIGNED_INT_SAMPLER_CUBE:
case LOCAL_GL_UNSIGNED_INT_SAMPLER_2D_ARRAY:
ret = {LOCAL_GL_INT};
break;
default:
ret = {elemType};
break;
}
std::array<uint16_t, 3> arr = {};
MOZ_ASSERT(arr[2] == 0);
for (const auto i : IntegerRange(ret.size())) {
arr[i] = AssertedCast<uint16_t>(ret[i]);
}
return arr;
}
void ClientWebGLContext::GetProgramInfoLog(const WebGLProgramJS& prog,
nsAString& retval) const {
retval.SetIsVoid(true);
const FuncScope funcScope(*this, "getProgramInfoLog");
if (IsContextLost()) return;
if (!prog.ValidateUsable(*this, "program")) return;
const auto& res = GetLinkResult(prog);
CopyUTF8toUTF16(res.log, retval);
}
void ClientWebGLContext::GetProgramParameter(
JSContext* const js, const WebGLProgramJS& prog, const GLenum pname,
JS::MutableHandle<JS::Value> retval) const {
retval.set(JS::NullValue());
const FuncScope funcScope(*this, "getProgramParameter");
if (IsContextLost()) return;
if (!prog.ValidateUsable(*this, "program")) return;
retval.set([&]() -> JS::Value {
switch (pname) {
case LOCAL_GL_DELETE_STATUS:
// "Is flagged for deletion?"
return JS::BooleanValue(!prog.mKeepAlive);
case LOCAL_GL_VALIDATE_STATUS:
return JS::BooleanValue(prog.mLastValidate);
case LOCAL_GL_ATTACHED_SHADERS: {
size_t shaders = 0;
for (const auto& pair : prog.mNextLink_Shaders) {
const auto& slot = pair.second;
if (slot.shader) {
shaders += 1;
}
}
return JS::NumberValue(shaders);
}
default:
break;
}
const auto& res = GetLinkResult(prog);
switch (pname) {
case LOCAL_GL_LINK_STATUS:
return JS::BooleanValue(res.success);
case LOCAL_GL_ACTIVE_ATTRIBUTES:
return JS::NumberValue(res.active.activeAttribs.size());
case LOCAL_GL_ACTIVE_UNIFORMS:
return JS::NumberValue(res.active.activeUniforms.size());
case LOCAL_GL_TRANSFORM_FEEDBACK_BUFFER_MODE:
if (!mIsWebGL2) break;
return JS::NumberValue(res.tfBufferMode);
case LOCAL_GL_TRANSFORM_FEEDBACK_VARYINGS:
if (!mIsWebGL2) break;
return JS::NumberValue(res.active.activeTfVaryings.size());
case LOCAL_GL_ACTIVE_UNIFORM_BLOCKS:
if (!mIsWebGL2) break;
return JS::NumberValue(res.active.activeUniformBlocks.size());
default:
break;
}
EnqueueError_ArgEnum("pname", pname);
return JS::NullValue();
}());
}
// -
// WebGLShaderJS
void ClientWebGLContext::CompileShader(WebGLShaderJS& shader) const {
const FuncScope funcScope(*this, "compileShader");
if (IsContextLost()) return;
if (!shader.ValidateUsable(*this, "shader")) return;
shader.mResult = {};
Run<RPROC(CompileShader)>(shader.mId);
}
void ClientWebGLContext::GetShaderInfoLog(const WebGLShaderJS& shader,
nsAString& retval) const {
retval.SetIsVoid(true);
const FuncScope funcScope(*this, "getShaderInfoLog");
if (IsContextLost()) return;
if (!shader.ValidateUsable(*this, "shader")) return;
const auto& result = GetCompileResult(shader);
CopyUTF8toUTF16(result.log, retval);
}
void ClientWebGLContext::GetShaderParameter(
JSContext* const cx, const WebGLShaderJS& shader, const GLenum pname,
JS::MutableHandle<JS::Value> retval) const {
retval.set(JS::NullValue());
const FuncScope funcScope(*this, "getShaderParameter");
if (IsContextLost()) return;
if (!shader.ValidateUsable(*this, "shader")) return;
retval.set([&]() -> JS::Value {
switch (pname) {
case LOCAL_GL_SHADER_TYPE:
return JS::NumberValue(shader.mType);
case LOCAL_GL_DELETE_STATUS: // "Is flagged for deletion?"
return JS::BooleanValue(!shader.mKeepAlive);
case LOCAL_GL_COMPILE_STATUS: {
const auto& result = GetCompileResult(shader);
return JS::BooleanValue(result.success);
}
default:
EnqueueError_ArgEnum("pname", pname);
return JS::NullValue();
}
}());
}
void ClientWebGLContext::GetShaderSource(const WebGLShaderJS& shader,
nsAString& retval) const {
retval.SetIsVoid(true);
const FuncScope funcScope(*this, "getShaderSource");
if (IsContextLost()) return;
if (!shader.ValidateUsable(*this, "shader")) return;
CopyUTF8toUTF16(shader.mSource, retval);
}
void ClientWebGLContext::GetTranslatedShaderSource(const WebGLShaderJS& shader,
nsAString& retval) const {
retval.SetIsVoid(true);
const FuncScope funcScope(*this, "getTranslatedShaderSource");
if (IsContextLost()) return;
if (!shader.ValidateUsable(*this, "shader")) return;
const auto& result = GetCompileResult(shader);
CopyUTF8toUTF16(result.translatedSource, retval);
}
void ClientWebGLContext::ShaderSource(WebGLShaderJS& shader,
const nsAString& sourceU16) const {
const FuncScope funcScope(*this, "shaderSource");
if (IsContextLost()) return;
if (!shader.ValidateUsable(*this, "shader")) return;
shader.mSource = ToString(NS_ConvertUTF16toUTF8(sourceU16));
Run<RPROC(ShaderSource)>(shader.mId, shader.mSource);
}
// -
const webgl::CompileResult& ClientWebGLContext::GetCompileResult(
const WebGLShaderJS& shader) const {
if (shader.mResult.pending) {
shader.mResult = [&]() {
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetCompileResult(shader.mId);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
webgl::CompileResult ret = {};
if (!child->SendGetCompileResult(shader.mId, &ret)) {
ret = {};
}
return ret;
}();
}
return shader.mResult;
}
const webgl::LinkResult& ClientWebGLContext::GetLinkResult(
const WebGLProgramJS& prog) const {
if (prog.mResult->pending) {
const auto notLost =
mNotLost; // Hold a strong-ref to prevent LoseContext=>UAF.
if (!notLost) return *(prog.mResult);
*(prog.mResult) = [&]() {
const auto& inProcess = mNotLost->inProcess;
if (inProcess) {
return inProcess->GetLinkResult(prog.mId);
}
const auto& child = mNotLost->outOfProcess;
child->FlushPendingCmds();
webgl::LinkResult ret;
if (!child->SendGetLinkResult(prog.mId, &ret)) {
ret = {};
}
return ret;
}();
prog.mUniformBlockBindings.resize(
prog.mResult->active.activeUniformBlocks.size());
auto& state = State();
if (state.mCurrentProgram == &prog && prog.mResult->success) {
state.mActiveLinkResult = prog.mResult;
}
}
return *(prog.mResult);
}
#undef RPROC
// ---------------------------
Maybe<Span<uint8_t>> ClientWebGLContext::ValidateArrayBufferView(
const Span<uint8_t>& bytes, size_t elemSize, GLuint elemOffset,
GLuint elemCountOverride, const GLenum errorEnum) const {
size_t elemCount = bytes.Length() / elemSize;
if (elemOffset > elemCount) {
EnqueueError(errorEnum, "Invalid offset into ArrayBufferView.");
return Nothing();
}
elemCount -= elemOffset;
if (elemCountOverride) {
if (elemCountOverride > elemCount) {
EnqueueError(errorEnum, "Invalid sub-length for ArrayBufferView.");
return Nothing();
}
elemCount = elemCountOverride;
}
return Some(bytes.Subspan(elemOffset * elemSize, elemCount * elemSize));
}
// ---------------------------
webgl::ObjectJS::ObjectJS(const ClientWebGLContext& webgl)
: mGeneration(webgl.mNotLost), mId(webgl.NextId()) {}
// -
WebGLFramebufferJS::WebGLFramebufferJS(const ClientWebGLContext& webgl,
bool opaque)
: webgl::ObjectJS(webgl), mOpaque(opaque) {
(void)mAttachments[LOCAL_GL_DEPTH_ATTACHMENT];
(void)mAttachments[LOCAL_GL_STENCIL_ATTACHMENT];
if (!webgl.mIsWebGL2) {
(void)mAttachments[LOCAL_GL_DEPTH_STENCIL_ATTACHMENT];
}
EnsureColorAttachments();
}
void WebGLFramebufferJS::EnsureColorAttachments() {
const auto& webgl = Context();
const auto& limits = webgl->Limits();
auto maxColorDrawBuffers = limits.maxColorDrawBuffers;
if (!webgl->mIsWebGL2 &&
!webgl->IsExtensionEnabled(WebGLExtensionID::WEBGL_draw_buffers)) {
maxColorDrawBuffers = 1;
}
for (const auto i : IntegerRange(maxColorDrawBuffers)) {
(void)mAttachments[LOCAL_GL_COLOR_ATTACHMENT0 + i];
}
}
WebGLProgramJS::WebGLProgramJS(const ClientWebGLContext& webgl)
: webgl::ObjectJS(webgl),
mKeepAlive(std::make_shared<webgl::ProgramKeepAlive>(*this)),
mKeepAliveWeak(mKeepAlive) {
(void)mNextLink_Shaders[LOCAL_GL_VERTEX_SHADER];
(void)mNextLink_Shaders[LOCAL_GL_FRAGMENT_SHADER];
mResult = std::make_shared<webgl::LinkResult>();
}
WebGLShaderJS::WebGLShaderJS(const ClientWebGLContext& webgl, const GLenum type)
: webgl::ObjectJS(webgl),
mType(type),
mKeepAlive(std::make_shared<webgl::ShaderKeepAlive>(*this)),
mKeepAliveWeak(mKeepAlive) {}
WebGLTransformFeedbackJS::WebGLTransformFeedbackJS(
const ClientWebGLContext& webgl)
: webgl::ObjectJS(webgl),
mAttribBuffers(webgl::kMaxTransformFeedbackSeparateAttribs) {}
WebGLVertexArrayJS::WebGLVertexArrayJS(const ClientWebGLContext& webgl)
: webgl::ObjectJS(webgl), mAttribBuffers(webgl.Limits().maxVertexAttribs) {}
// -
#define _(WebGLType) \
JSObject* WebGLType##JS::WrapObject(JSContext* const cx, \
JS::Handle<JSObject*> givenProto) { \
return dom::WebGLType##_Binding::Wrap(cx, this, givenProto); \
}
_(WebGLBuffer)
_(WebGLFramebuffer)
_(WebGLProgram)
_(WebGLQuery)
_(WebGLRenderbuffer)
_(WebGLSampler)
_(WebGLShader)
_(WebGLSync)
_(WebGLTexture)
_(WebGLTransformFeedback)
_(WebGLUniformLocation)
//_(WebGLVertexArray) // The webidl is `WebGLVertexArrayObject` :(
#undef _
JSObject* WebGLVertexArrayJS::WrapObject(JSContext* const cx,
JS::Handle<JSObject*> givenProto) {
return dom::WebGLVertexArrayObject_Binding::Wrap(cx, this, givenProto);
}
bool WebGLActiveInfoJS::WrapObject(JSContext* const cx,
JS::Handle<JSObject*> givenProto,
JS::MutableHandle<JSObject*> reflector) {
return dom::WebGLActiveInfo_Binding::Wrap(cx, this, givenProto, reflector);
}
bool WebGLShaderPrecisionFormatJS::WrapObject(
JSContext* const cx, JS::Handle<JSObject*> givenProto,
JS::MutableHandle<JSObject*> reflector) {
return dom::WebGLShaderPrecisionFormat_Binding::Wrap(cx, this, givenProto,
reflector);
}
// ---------------------
// Todo: Move this to RefPtr.h.
template <typename T>
void ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& callback,
const RefPtr<T>& field, const char* name,
uint32_t flags) {
ImplCycleCollectionTraverse(callback, const_cast<RefPtr<T>&>(field), name,
flags);
}
// -
template <typename T>
void ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& callback,
const std::vector<RefPtr<T>>& field,
const char* name, uint32_t flags) {
for (const auto& cur : field) {
ImplCycleCollectionTraverse(callback, cur, name, flags);
}
}
template <typename T>
void ImplCycleCollectionUnlink(std::vector<RefPtr<T>>& field) {
field = {};
}
// -
template <typename T, size_t N>
void ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& callback,
const std::array<RefPtr<T>, N>& field,
const char* name, uint32_t flags) {
for (const auto& cur : field) {
ImplCycleCollectionTraverse(callback, cur, name, flags);
}
}
template <typename T, size_t N>
void ImplCycleCollectionUnlink(std::array<RefPtr<T>, N>& field) {
field = {};
}
// -
template <typename T>
void ImplCycleCollectionTraverse(
nsCycleCollectionTraversalCallback& callback,
const std::unordered_map<GLenum, RefPtr<T>>& field, const char* name,
uint32_t flags) {
for (const auto& pair : field) {
ImplCycleCollectionTraverse(callback, pair.second, name, flags);
}
}
template <typename T>
void ImplCycleCollectionUnlink(std::unordered_map<GLenum, RefPtr<T>>& field) {
field = {};
}
// -
void ImplCycleCollectionTraverse(
nsCycleCollectionTraversalCallback& callback,
const std::unordered_map<GLenum, WebGLFramebufferJS::Attachment>& field,
const char* name, uint32_t flags) {
for (const auto& pair : field) {
const auto& attach = pair.second;
ImplCycleCollectionTraverse(callback, attach.rb, name, flags);
ImplCycleCollectionTraverse(callback, attach.tex, name, flags);
}
}
void ImplCycleCollectionUnlink(
std::unordered_map<GLenum, WebGLFramebufferJS::Attachment>& field) {
field = {};
}
// -
void ImplCycleCollectionTraverse(
nsCycleCollectionTraversalCallback& callback,
const std::unordered_map<GLenum, WebGLProgramJS::Attachment>& field,
const char* name, uint32_t flags) {
for (const auto& pair : field) {
const auto& attach = pair.second;
ImplCycleCollectionTraverse(callback, attach.shader, name, flags);
}
}
void ImplCycleCollectionUnlink(
std::unordered_map<GLenum, WebGLProgramJS::Attachment>& field) {
field = {};
}
// -
void ImplCycleCollectionUnlink(
const RefPtr<ClientWebGLExtensionLoseContext>& field) {
const_cast<RefPtr<ClientWebGLExtensionLoseContext>&>(field) = nullptr;
}
void ImplCycleCollectionUnlink(const RefPtr<WebGLProgramJS>& field) {
const_cast<RefPtr<WebGLProgramJS>&>(field) = nullptr;
}
void ImplCycleCollectionUnlink(const RefPtr<WebGLShaderJS>& field) {
const_cast<RefPtr<WebGLShaderJS>&>(field) = nullptr;
}
// ----------------------
void ImplCycleCollectionTraverse(
nsCycleCollectionTraversalCallback& callback,
const std::shared_ptr<webgl::NotLostData>& field, const char* name,
uint32_t flags) {
if (!field) return;
ImplCycleCollectionTraverse(callback, field->extensions,
"NotLostData.extensions", flags);
const auto& state = field->state;
ImplCycleCollectionTraverse(callback, state.mDefaultTfo, "state.mDefaultTfo",
flags);
ImplCycleCollectionTraverse(callback, state.mDefaultVao, "state.mDefaultVao",
flags);
ImplCycleCollectionTraverse(callback, state.mCurrentProgram,
"state.mCurrentProgram", flags);
ImplCycleCollectionTraverse(callback, state.mBoundBufferByTarget,
"state.mBoundBufferByTarget", flags);
ImplCycleCollectionTraverse(callback, state.mBoundUbos, "state.mBoundUbos",
flags);
ImplCycleCollectionTraverse(callback, state.mBoundDrawFb,
"state.mBoundDrawFb", flags);
ImplCycleCollectionTraverse(callback, state.mBoundReadFb,
"state.mBoundReadFb", flags);
ImplCycleCollectionTraverse(callback, state.mBoundRb, "state.mBoundRb",
flags);
ImplCycleCollectionTraverse(callback, state.mBoundTfo, "state.mBoundTfo",
flags);
ImplCycleCollectionTraverse(callback, state.mBoundVao, "state.mBoundVao",
flags);
ImplCycleCollectionTraverse(callback, state.mCurrentQueryByTarget,
"state.state.mCurrentQueryByTarget", flags);
for (const auto& texUnit : state.mTexUnits) {
ImplCycleCollectionTraverse(callback, texUnit.sampler,
"state.mTexUnits[].sampler", flags);
ImplCycleCollectionTraverse(callback, texUnit.texByTarget,
"state.mTexUnits[].texByTarget", flags);
}
}
void ImplCycleCollectionUnlink(std::shared_ptr<webgl::NotLostData>& field) {
if (!field) return;
const auto keepAlive = field;
keepAlive->extensions = {};
keepAlive->state = {};
field = nullptr;
}
// -----------------------------------------------------
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLBufferJS)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(WebGLFramebufferJS, mAttachments)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(WebGLProgramJS, mNextLink_Shaders)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLQueryJS)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLRenderbufferJS)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLSamplerJS)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLShaderJS)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLSyncJS)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLTextureJS)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(WebGLTransformFeedbackJS, mAttribBuffers,
mActiveProgram)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_0(WebGLUniformLocationJS)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(WebGLVertexArrayJS, mIndexBuffer,
mAttribBuffers)
// -
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ClientWebGLContext)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsICanvasRenderingContextInternal)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(ClientWebGLContext)
NS_IMPL_CYCLE_COLLECTING_RELEASE(ClientWebGLContext)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_WEAK_PTR(
ClientWebGLContext, mExtLoseContext, mNotLost,
// Don't forget nsICanvasRenderingContextInternal:
mCanvasElement, mOffscreenCanvas)
// -----------------------------
} // namespace mozilla