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/* -*- 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 "InlineTranslator.h"
#include "RecordedEventImpl.h"
#include "DrawEventRecorder.h"
#include "gfxContext.h"
#include "nsDeviceContext.h"
#include "mozilla/gfx/RecordingTypes.h"
#include "mozilla/UniquePtr.h"
using namespace mozilla::gfx;
namespace mozilla::gfx {
InlineTranslator::InlineTranslator() : mFontContext(nullptr) {}
InlineTranslator::InlineTranslator(DrawTarget* aDT, void* aFontContext)
: mBaseDT(aDT), mFontContext(aFontContext) {}
bool InlineTranslator::TranslateRecording(char* aData, size_t aLen) {
// an istream like class for reading from memory
struct MemReader {
MemReader(char* aData, size_t aLen) : mData(aData), mEnd(aData + aLen) {}
void read(char* s, std::streamsize n) {
if (n <= (mEnd - mData)) {
memcpy(s, mData, n);
mData += n;
} else {
// We've requested more data than is available
// set the Reader into an eof state
SetIsBad();
}
}
bool eof() { return mData > mEnd; }
bool good() { return !eof(); }
void SetIsBad() { mData = mEnd + 1; }
char* mData;
char* mEnd;
};
MemReader reader(aData, aLen);
uint32_t magicInt;
ReadElement(reader, magicInt);
if (magicInt != mozilla::gfx::kMagicInt) {
mError = "Magic";
return false;
}
uint16_t majorRevision;
ReadElement(reader, majorRevision);
if (majorRevision != kMajorRevision) {
mError = "Major";
return false;
}
uint16_t minorRevision;
ReadElement(reader, minorRevision);
if (minorRevision > kMinorRevision) {
mError = "Minor";
return false;
}
int32_t eventType;
ReadElement(reader, eventType);
while (reader.good()) {
bool success = RecordedEvent::DoWithEvent(
reader, static_cast<RecordedEvent::EventType>(eventType),
[&](RecordedEvent* recordedEvent) -> bool {
// Make sure that the whole event was read from the stream
// successfully.
if (!reader.good()) {
mError = " READ";
return false;
}
if (!recordedEvent->PlayEvent(this)) {
mError = " PLAY";
return false;
}
return true;
});
if (!success) {
mError = RecordedEvent::GetEventName(
static_cast<RecordedEvent::EventType>(eventType)) +
mError;
return false;
}
ReadElement(reader, eventType);
}
return true;
}
already_AddRefed<DrawTarget> InlineTranslator::CreateDrawTarget(
ReferencePtr aRefPtr, const gfx::IntSize& aSize,
gfx::SurfaceFormat aFormat) {
MOZ_ASSERT(mBaseDT, "mBaseDT has not been initialized.");
RefPtr<DrawTarget> drawTarget = mBaseDT;
AddDrawTarget(aRefPtr, drawTarget);
return drawTarget.forget();
}
already_AddRefed<SourceSurface> InlineTranslator::LookupExternalSurface(
uint64_t aKey) {
if (mExternalSurfaces) {
RefPtr<SourceSurface> surface = mExternalSurfaces->Get(aKey);
if (surface) {
return surface.forget();
}
}
if (!mDependentSurfaces) {
return nullptr;
}
RefPtr<RecordedDependentSurface> recordedSurface =
mDependentSurfaces->Get(aKey);
if (!recordedSurface) {
return nullptr;
}
RefPtr<DrawTarget> newDT = GetReferenceDrawTarget()->CreateSimilarDrawTarget(
recordedSurface->mSize, SurfaceFormat::B8G8R8A8);
InlineTranslator translator(newDT, nullptr);
translator.SetDependentSurfaces(mDependentSurfaces);
if (!translator.TranslateRecording((char*)recordedSurface->mRecording.mData,
recordedSurface->mRecording.mLen)) {
return nullptr;
}
RefPtr<SourceSurface> snapshot = newDT->Snapshot();
return snapshot.forget();
}
} // namespace mozilla::gfx