Source code

Revision control

Copy as Markdown

Other Tools

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "GLImages.h"
#include "GLContext.h"
#include "GLContextProvider.h"
#include "ScopedGLHelpers.h"
#include "GLImages.h"
#include "GLBlitHelper.h"
#include "GLReadTexImageHelper.h"
#include "GLLibraryEGL.h"
#include "mozilla/gfx/Logging.h"
using namespace mozilla;
using namespace mozilla::gl;
namespace mozilla {
namespace layers {
static RefPtr<GLContext> sSnapshotContext;
already_AddRefed<gfx::SourceSurface> GLImage::GetAsSourceSurface() {
MOZ_ASSERT(NS_IsMainThread(), "Should be on the main thread");
if (!sSnapshotContext) {
nsCString discardFailureId;
sSnapshotContext = GLContextProvider::CreateHeadless({}, &discardFailureId);
if (!sSnapshotContext) {
NS_WARNING("Failed to create snapshot GLContext");
return nullptr;
}
}
sSnapshotContext->MakeCurrent();
ScopedTexture scopedTex(sSnapshotContext);
ScopedBindTexture boundTex(sSnapshotContext, scopedTex.Texture());
gfx::IntSize size = GetSize();
sSnapshotContext->fTexImage2D(LOCAL_GL_TEXTURE_2D, 0, LOCAL_GL_RGBA,
size.width, size.height, 0, LOCAL_GL_RGBA,
LOCAL_GL_UNSIGNED_BYTE, nullptr);
ScopedFramebufferForTexture autoFBForTex(sSnapshotContext,
scopedTex.Texture());
if (!autoFBForTex.IsComplete()) {
gfxCriticalError()
<< "GetAsSourceSurface: ScopedFramebufferForTexture failed.";
return nullptr;
}
const gl::OriginPos destOrigin = gl::OriginPos::TopLeft;
{
const ScopedBindFramebuffer bindFB(sSnapshotContext, autoFBForTex.FB());
if (!sSnapshotContext->BlitHelper()->BlitImageToFramebuffer(this, size,
destOrigin)) {
return nullptr;
}
}
RefPtr<gfx::DataSourceSurface> source =
gfx::Factory::CreateDataSourceSurface(size, gfx::SurfaceFormat::B8G8R8A8);
if (NS_WARN_IF(!source)) {
return nullptr;
}
ScopedBindFramebuffer bind(sSnapshotContext, autoFBForTex.FB());
ReadPixelsIntoDataSurface(sSnapshotContext, source);
return source.forget();
}
#ifdef MOZ_WIDGET_ANDROID
SurfaceTextureImage::SurfaceTextureImage(AndroidSurfaceTextureHandle aHandle,
const gfx::IntSize& aSize,
bool aContinuous,
gl::OriginPos aOriginPos,
bool aHasAlpha /* = true */)
: GLImage(ImageFormat::SURFACE_TEXTURE),
mHandle(aHandle),
mSize(aSize),
mContinuous(aContinuous),
mOriginPos(aOriginPos),
mHasAlpha(aHasAlpha) {
MOZ_ASSERT(mHandle);
}
Maybe<SurfaceDescriptor> SurfaceTextureImage::GetDesc() {
SurfaceDescriptor sd = SurfaceTextureDescriptor(
mHandle, mSize,
mHasAlpha ? gfx::SurfaceFormat::R8G8B8A8 : gfx::SurfaceFormat::R8G8B8X8,
false /* NOT continuous */, false /* do not ignore transform */);
return Some(sd);
}
#endif
} // namespace layers
} // namespace mozilla