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/* -*- Mode: C++; tab-width: 2; 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 "ImageLogging.h" // Must appear first
#include "gfxPlatform.h"
#include "jxl/codestream_header.h"
#include "jxl/decode_cxx.h"
#include "jxl/types.h"
#include "mozilla/TelemetryHistogramEnums.h"
#include "mozilla/gfx/Point.h"
#include "nsJXLDecoder.h"
#include "RasterImage.h"
#include "SurfacePipeFactory.h"
using namespace mozilla::gfx;
namespace mozilla::image {
#define JXL_TRY(expr) \
do { \
JxlDecoderStatus status = (expr); \
if (status != JXL_DEC_SUCCESS) { \
return Transition::TerminateFailure(); \
} \
} while (0);
#define JXL_TRY_BOOL(expr) \
do { \
bool succeeded = (expr); \
if (!succeeded) { \
return Transition::TerminateFailure(); \
} \
} while (0);
static LazyLogModule sJXLLog("JXLDecoder");
nsJXLDecoder::nsJXLDecoder(RasterImage* aImage)
: Decoder(aImage),
mLexer(Transition::ToUnbuffered(State::FINISHED_JXL_DATA, State::JXL_DATA,
SIZE_MAX),
Transition::TerminateSuccess()),
mDecoder(JxlDecoderMake(nullptr)),
mParallelRunner(
JxlThreadParallelRunnerMake(nullptr, PreferredThreadCount())) {
JxlDecoderSubscribeEvents(mDecoder.get(),
JXL_DEC_BASIC_INFO | JXL_DEC_FULL_IMAGE);
JxlDecoderSetParallelRunner(mDecoder.get(), JxlThreadParallelRunner,
mParallelRunner.get());
MOZ_LOG(sJXLLog, LogLevel::Debug,
("[this=%p] nsJXLDecoder::nsJXLDecoder", this));
}
nsJXLDecoder::~nsJXLDecoder() {
MOZ_LOG(sJXLLog, LogLevel::Debug,
("[this=%p] nsJXLDecoder::~nsJXLDecoder", this));
}
size_t nsJXLDecoder::PreferredThreadCount() {
if (IsMetadataDecode()) {
return 0; // no additional worker thread
}
return JxlThreadParallelRunnerDefaultNumWorkerThreads();
}
LexerResult nsJXLDecoder::DoDecode(SourceBufferIterator& aIterator,
IResumable* aOnResume) {
// return LexerResult(TerminalState::FAILURE);
MOZ_ASSERT(!HasError(), "Shouldn't call DoDecode after error!");
return mLexer.Lex(aIterator, aOnResume,
[=](State aState, const char* aData, size_t aLength) {
switch (aState) {
case State::JXL_DATA:
return ReadJXLData(aData, aLength);
case State::FINISHED_JXL_DATA:
return FinishedJXLData();
}
MOZ_CRASH("Unknown State");
});
};
LexerTransition<nsJXLDecoder::State> nsJXLDecoder::ReadJXLData(
const char* aData, size_t aLength) {
const uint8_t* input = (const uint8_t*)aData;
size_t length = aLength;
if (mBuffer.length() != 0) {
JXL_TRY_BOOL(mBuffer.append(aData, aLength));
input = mBuffer.begin();
length = mBuffer.length();
}
JXL_TRY(JxlDecoderSetInput(mDecoder.get(), input, length));
while (true) {
JxlDecoderStatus status = JxlDecoderProcessInput(mDecoder.get());
switch (status) {
case JXL_DEC_ERROR:
default:
return Transition::TerminateFailure();
case JXL_DEC_NEED_MORE_INPUT: {
size_t remaining = JxlDecoderReleaseInput(mDecoder.get());
mBuffer.clear();
JXL_TRY_BOOL(mBuffer.append(aData + aLength - remaining, remaining));
return Transition::ContinueUnbuffered(State::JXL_DATA);
}
case JXL_DEC_BASIC_INFO: {
JXL_TRY(JxlDecoderGetBasicInfo(mDecoder.get(), &mInfo));
PostSize(mInfo.xsize, mInfo.ysize);
if (mInfo.alpha_bits > 0) {
PostHasTransparency();
}
if (IsMetadataDecode()) {
return Transition::TerminateSuccess();
}
break;
}
case JXL_DEC_NEED_IMAGE_OUT_BUFFER: {
size_t size = 0;
JxlPixelFormat format{4, JXL_TYPE_UINT8, JXL_LITTLE_ENDIAN, 0};
JXL_TRY(JxlDecoderImageOutBufferSize(mDecoder.get(), &format, &size));
mOutBuffer.clear();
JXL_TRY_BOOL(mOutBuffer.growBy(size));
JXL_TRY(JxlDecoderSetImageOutBuffer(mDecoder.get(), &format,
mOutBuffer.begin(), size));
break;
}
case JXL_DEC_FULL_IMAGE: {
OrientedIntSize size(mInfo.xsize, mInfo.ysize);
Maybe<SurfacePipe> pipe = SurfacePipeFactory::CreateSurfacePipe(
this, size, OutputSize(), FullFrame(), SurfaceFormat::R8G8B8A8,
SurfaceFormat::OS_RGBA, Nothing(), nullptr, SurfacePipeFlags());
for (uint8_t* rowPtr = mOutBuffer.begin(); rowPtr < mOutBuffer.end();
rowPtr += mInfo.xsize * 4) {
pipe->WriteBuffer(reinterpret_cast<uint32_t*>(rowPtr));
}
if (Maybe<SurfaceInvalidRect> invalidRect = pipe->TakeInvalidRect()) {
PostInvalidation(invalidRect->mInputSpaceRect,
Some(invalidRect->mOutputSpaceRect));
}
PostFrameStop();
PostDecodeDone();
return Transition::TerminateSuccess();
}
}
}
}
LexerTransition<nsJXLDecoder::State> nsJXLDecoder::FinishedJXLData() {
MOZ_ASSERT_UNREACHABLE("Read the entire address space?");
return Transition::TerminateFailure();
}
} // namespace mozilla::image
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