gecko-dev/gfx/2d/InlineTranslator.cpp

111 строки
2.9 KiB
C++

/* -*- 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 {
namespace gfx {
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
mData = mEnd + 1;
}
}
bool eof() {
return mData > mEnd;
}
bool good() {
return !eof();
}
char *mData;
char *mEnd;
};
MemReader reader(aData, aLen);
uint32_t magicInt;
ReadElement(reader, magicInt);
if (magicInt != mozilla::gfx::kMagicInt) {
return false;
}
uint16_t majorRevision;
ReadElement(reader, majorRevision);
if (majorRevision != kMajorRevision) {
return false;
}
uint16_t minorRevision;
ReadElement(reader, minorRevision);
if (minorRevision > kMinorRevision) {
return false;
}
int32_t eventType;
ReadElement(reader, eventType);
while (reader.good()) {
bool success = RecordedEvent::DoWithEvent(reader, static_cast<RecordedEvent::EventType>(eventType),
[&] (RecordedEvent *recordedEvent) {
// Make sure that the whole event was read from the stream successfully.
if (!reader.good()) {
return false;
}
if (!recordedEvent->PlayEvent(this)) {
return false;
}
return true;
});
if (!success) {
return false;
}
ReadElement(reader, eventType);
}
return true;
}
already_AddRefed<DrawTarget>
InlineTranslator::CreateDrawTarget(ReferencePtr aRefPtr,
const gfx::IntSize &aSize,
gfx::SurfaceFormat aFormat)
{
RefPtr<DrawTarget> drawTarget = mBaseDT;
AddDrawTarget(aRefPtr, drawTarget);
return drawTarget.forget();
}
} // namespace gfx
} // namespace mozilla