зеркало из https://github.com/mozilla/gecko-dev.git
146 строки
4.0 KiB
C++
146 строки
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "InlineTranslator.h"
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#include "RecordedEventImpl.h"
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#include "DrawEventRecorder.h"
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#include "gfxContext.h"
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#include "nsDeviceContext.h"
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#include "mozilla/gfx/RecordingTypes.h"
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#include "mozilla/UniquePtr.h"
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using namespace mozilla::gfx;
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namespace mozilla::gfx {
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InlineTranslator::InlineTranslator() : mFontContext(nullptr) {}
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InlineTranslator::InlineTranslator(DrawTarget* aDT, void* aFontContext)
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: mBaseDT(aDT), mFontContext(aFontContext) {}
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bool InlineTranslator::TranslateRecording(char* aData, size_t aLen) {
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// an istream like class for reading from memory
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struct MemReader {
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MemReader(char* aData, size_t aLen) : mData(aData), mEnd(aData + aLen) {}
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void read(char* s, std::streamsize n) {
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if (n <= (mEnd - mData)) {
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memcpy(s, mData, n);
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mData += n;
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} else {
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// We've requested more data than is available
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// set the Reader into an eof state
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SetIsBad();
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}
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}
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bool eof() { return mData > mEnd; }
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bool good() { return !eof(); }
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void SetIsBad() { mData = mEnd + 1; }
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char* mData;
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char* mEnd;
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};
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MemReader reader(aData, aLen);
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uint32_t magicInt;
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ReadElement(reader, magicInt);
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if (magicInt != mozilla::gfx::kMagicInt) {
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mError = "Magic";
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return false;
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}
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uint16_t majorRevision;
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ReadElement(reader, majorRevision);
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if (majorRevision != kMajorRevision) {
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mError = "Major";
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return false;
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}
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uint16_t minorRevision;
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ReadElement(reader, minorRevision);
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if (minorRevision > kMinorRevision) {
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mError = "Minor";
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return false;
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}
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int32_t eventType;
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ReadElement(reader, eventType);
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while (reader.good()) {
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bool success = RecordedEvent::DoWithEvent(
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reader, static_cast<RecordedEvent::EventType>(eventType),
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[&](RecordedEvent* recordedEvent) -> bool {
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// Make sure that the whole event was read from the stream
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// successfully.
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if (!reader.good()) {
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mError = " READ";
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return false;
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}
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if (!recordedEvent->PlayEvent(this)) {
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mError = " PLAY";
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return false;
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}
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return true;
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});
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if (!success) {
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mError = RecordedEvent::GetEventName(
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static_cast<RecordedEvent::EventType>(eventType)) +
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mError;
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return false;
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}
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ReadElement(reader, eventType);
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}
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return true;
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}
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already_AddRefed<DrawTarget> InlineTranslator::CreateDrawTarget(
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ReferencePtr aRefPtr, const gfx::IntSize& aSize,
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gfx::SurfaceFormat aFormat) {
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MOZ_ASSERT(mBaseDT, "mBaseDT has not been initialized.");
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RefPtr<DrawTarget> drawTarget = mBaseDT;
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AddDrawTarget(aRefPtr, drawTarget);
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return drawTarget.forget();
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}
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already_AddRefed<SourceSurface> InlineTranslator::LookupExternalSurface(
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uint64_t aKey) {
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if (mExternalSurfaces) {
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RefPtr<SourceSurface> surface = mExternalSurfaces->Get(aKey);
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if (surface) {
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return surface.forget();
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}
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}
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if (!mDependentSurfaces) {
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return nullptr;
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}
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RefPtr<RecordedDependentSurface> recordedSurface =
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mDependentSurfaces->Get(aKey);
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if (!recordedSurface) {
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return nullptr;
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}
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RefPtr<DrawTarget> newDT = GetReferenceDrawTarget()->CreateSimilarDrawTarget(
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recordedSurface->mSize, SurfaceFormat::B8G8R8A8);
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InlineTranslator translator(newDT, nullptr);
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translator.SetDependentSurfaces(mDependentSurfaces);
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if (!translator.TranslateRecording((char*)recordedSurface->mRecording.mData,
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recordedSurface->mRecording.mLen)) {
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return nullptr;
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}
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RefPtr<SourceSurface> snapshot = newDT->Snapshot();
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return snapshot.forget();
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}
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} // namespace mozilla::gfx
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