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gecko-dev/image/imgTools.cpp

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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 "imgTools.h"
#include "DecodePool.h"
#include "gfxUtils.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Logging.h"
#include "mozilla/RefPtr.h"
#include "nsCOMPtr.h"
#include "nsIDocument.h"
#include "nsError.h"
#include "imgLoader.h"
#include "imgICache.h"
#include "imgIContainer.h"
#include "imgIEncoder.h"
#include "nsNetUtil.h" // for NS_NewBufferedInputStream
#include "nsStreamUtils.h"
#include "nsStringStream.h"
#include "nsContentUtils.h"
#include "nsProxyRelease.h"
#include "ImageFactory.h"
#include "Image.h"
#include "ScriptedNotificationObserver.h"
#include "imgIScriptedNotificationObserver.h"
#include "gfxPlatform.h"
#include "jsfriendapi.h"
using namespace mozilla::gfx;
namespace mozilla {
namespace image {
namespace {
class ImageDecoderHelper final : public Runnable,
public nsIInputStreamCallback {
public:
NS_DECL_ISUPPORTS_INHERITED
ImageDecoderHelper(already_AddRefed<image::Image> aImage,
already_AddRefed<nsIInputStream> aInputStream,
nsIEventTarget* aEventTarget,
imgIContainerCallback* aCallback,
nsIEventTarget* aCallbackEventTarget)
: Runnable("ImageDecoderHelper"),
mImage(std::move(aImage)),
mInputStream(std::move(aInputStream)),
mEventTarget(aEventTarget),
mCallback(aCallback),
mCallbackEventTarget(aCallbackEventTarget),
mStatus(NS_OK) {
MOZ_ASSERT(NS_IsMainThread());
}
NS_IMETHOD
Run() override {
// This runnable is dispatched on the Image thread when reading data, but
// at the end, it goes back to the main-thread in order to complete the
// operation.
if (NS_IsMainThread()) {
// Let the Image know we've sent all the data.
mImage->OnImageDataComplete(nullptr, nullptr, mStatus, true);
RefPtr<ProgressTracker> tracker = mImage->GetProgressTracker();
tracker->SyncNotifyProgress(FLAG_LOAD_COMPLETE);
nsCOMPtr<imgIContainer> container;
if (NS_SUCCEEDED(mStatus)) {
container = mImage;
}
mCallback->OnImageReady(container, mStatus);
return NS_OK;
}
uint64_t length;
nsresult rv = mInputStream->Available(&length);
if (rv == NS_BASE_STREAM_CLOSED) {
return OperationCompleted(NS_OK);
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return OperationCompleted(rv);
}
// Nothing else to read, but maybe we just need to wait.
if (length == 0) {
nsCOMPtr<nsIAsyncInputStream> asyncInputStream =
do_QueryInterface(mInputStream);
if (asyncInputStream) {
rv = asyncInputStream->AsyncWait(this, 0, 0, mEventTarget);
if (NS_WARN_IF(NS_FAILED(rv))) {
return OperationCompleted(rv);
}
return NS_OK;
}
// We really have nothing else to read.
if (length == 0) {
return OperationCompleted(NS_OK);
}
}
// Send the source data to the Image.
rv = mImage->OnImageDataAvailable(nullptr, nullptr, mInputStream, 0,
uint32_t(length));
if (NS_WARN_IF(NS_FAILED(rv))) {
return OperationCompleted(rv);
}
rv = mEventTarget->Dispatch(this, NS_DISPATCH_NORMAL);
if (NS_WARN_IF(NS_FAILED(rv))) {
return OperationCompleted(rv);
}
return NS_OK;
}
NS_IMETHOD
OnInputStreamReady(nsIAsyncInputStream* aAsyncInputStream) override {
MOZ_ASSERT(!NS_IsMainThread());
return Run();
}
nsresult OperationCompleted(nsresult aStatus) {
MOZ_ASSERT(!NS_IsMainThread());
mStatus = aStatus;
mCallbackEventTarget->Dispatch(this, NS_DISPATCH_NORMAL);
return NS_OK;
}
private:
~ImageDecoderHelper() {
NS_ReleaseOnMainThreadSystemGroup("ImageDecoderHelper::mImage",
mImage.forget());
NS_ReleaseOnMainThreadSystemGroup("ImageDecoderHelper::mCallback",
mCallback.forget());
}
RefPtr<image::Image> mImage;
nsCOMPtr<nsIInputStream> mInputStream;
nsCOMPtr<nsIEventTarget> mEventTarget;
nsCOMPtr<imgIContainerCallback> mCallback;
nsCOMPtr<nsIEventTarget> mCallbackEventTarget;
nsresult mStatus;
};
NS_IMPL_ISUPPORTS_INHERITED(ImageDecoderHelper, Runnable,
nsIInputStreamCallback)
} // namespace
/* ========== imgITools implementation ========== */
NS_IMPL_ISUPPORTS(imgTools, imgITools)
imgTools::imgTools() { /* member initializers and constructor code */
}
imgTools::~imgTools() { /* destructor code */
}
NS_IMETHODIMP
imgTools::DecodeImageFromArrayBuffer(JS::HandleValue aArrayBuffer,
const nsACString& aMimeType,
JSContext* aCx,
imgIContainer** aContainer) {
if (!aArrayBuffer.isObject()) {
return NS_ERROR_FAILURE;
}
JS::Rooted<JSObject*> obj(aCx,
js::UnwrapArrayBuffer(&aArrayBuffer.toObject()));
if (!obj) {
return NS_ERROR_FAILURE;
}
uint8_t* bufferData = nullptr;
uint32_t bufferLength = 0;
bool isSharedMemory = false;
js::GetArrayBufferLengthAndData(obj, &bufferLength, &isSharedMemory,
&bufferData);
return DecodeImageFromBuffer((char*)bufferData, bufferLength, aMimeType,
aContainer);
}
NS_IMETHODIMP
imgTools::DecodeImageFromBuffer(const char* aBuffer, uint32_t aSize,
const nsACString& aMimeType,
imgIContainer** aContainer) {
MOZ_ASSERT(NS_IsMainThread());
NS_ENSURE_ARG_POINTER(aBuffer);
// Create a new image container to hold the decoded data.
nsAutoCString mimeType(aMimeType);
RefPtr<image::Image> image =
ImageFactory::CreateAnonymousImage(mimeType, aSize);
RefPtr<ProgressTracker> tracker = image->GetProgressTracker();
if (image->HasError()) {
return NS_ERROR_FAILURE;
}
// Let's create a temporary inputStream.
nsCOMPtr<nsIInputStream> stream;
nsresult rv = NS_NewByteInputStream(getter_AddRefs(stream), aBuffer, aSize,
NS_ASSIGNMENT_DEPEND);
NS_ENSURE_SUCCESS(rv, rv);
MOZ_ASSERT(stream);
MOZ_ASSERT(NS_InputStreamIsBuffered(stream));
rv = image->OnImageDataAvailable(nullptr, nullptr, stream, 0, aSize);
NS_ENSURE_SUCCESS(rv, rv);
// Let the Image know we've sent all the data.
rv = image->OnImageDataComplete(nullptr, nullptr, NS_OK, true);
tracker->SyncNotifyProgress(FLAG_LOAD_COMPLETE);
NS_ENSURE_SUCCESS(rv, rv);
// All done.
image.forget(aContainer);
return NS_OK;
}
NS_IMETHODIMP
imgTools::DecodeImageAsync(nsIInputStream* aInStr, const nsACString& aMimeType,
imgIContainerCallback* aCallback,
nsIEventTarget* aEventTarget) {
MOZ_ASSERT(NS_IsMainThread());
NS_ENSURE_ARG_POINTER(aInStr);
NS_ENSURE_ARG_POINTER(aCallback);
NS_ENSURE_ARG_POINTER(aEventTarget);
nsresult rv;
// Let's continuing the reading on a separate thread.
DecodePool* decodePool = DecodePool::Singleton();
MOZ_ASSERT(decodePool);
RefPtr<nsIEventTarget> target = decodePool->GetIOEventTarget();
NS_ENSURE_TRUE(target, NS_ERROR_FAILURE);
// Prepare the input stream.
nsCOMPtr<nsIInputStream> stream = aInStr;
if (!NS_InputStreamIsBuffered(aInStr)) {
nsCOMPtr<nsIInputStream> bufStream;
rv = NS_NewBufferedInputStream(getter_AddRefs(bufStream), stream.forget(),
1024);
NS_ENSURE_SUCCESS(rv, rv);
stream = bufStream.forget();
}
// Create a new image container to hold the decoded data.
nsAutoCString mimeType(aMimeType);
RefPtr<image::Image> image = ImageFactory::CreateAnonymousImage(mimeType, 0);
// Already an error?
if (image->HasError()) {
return NS_ERROR_FAILURE;
}
RefPtr<ImageDecoderHelper> helper = new ImageDecoderHelper(
image.forget(), stream.forget(), target, aCallback, aEventTarget);
rv = target->Dispatch(helper.forget(), NS_DISPATCH_NORMAL);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
/**
* This takes a DataSourceSurface rather than a SourceSurface because some
* of the callers have a DataSourceSurface and we don't want to call
* GetDataSurface on such surfaces since that may incure a conversion to
* SurfaceType::DATA which we don't need.
*/
static nsresult EncodeImageData(DataSourceSurface* aDataSurface,
DataSourceSurface::ScopedMap& aMap,
const nsACString& aMimeType,
const nsAString& aOutputOptions,
nsIInputStream** aStream) {
MOZ_ASSERT(aDataSurface->GetFormat() == SurfaceFormat::B8G8R8A8 ||
aDataSurface->GetFormat() == SurfaceFormat::B8G8R8X8,
"We're assuming B8G8R8A8/X8");
// Get an image encoder for the media type
nsAutoCString encoderCID(
NS_LITERAL_CSTRING("@mozilla.org/image/encoder;2?type=") + aMimeType);
nsCOMPtr<imgIEncoder> encoder = do_CreateInstance(encoderCID.get());
if (!encoder) {
return NS_IMAGELIB_ERROR_NO_ENCODER;
}
IntSize size = aDataSurface->GetSize();
uint32_t dataLength = aMap.GetStride() * size.height;
// Encode the bitmap
nsresult rv = encoder->InitFromData(
aMap.GetData(), dataLength, size.width, size.height, aMap.GetStride(),
imgIEncoder::INPUT_FORMAT_HOSTARGB, aOutputOptions);
NS_ENSURE_SUCCESS(rv, rv);
encoder.forget(aStream);
return NS_OK;
}
static nsresult EncodeImageData(DataSourceSurface* aDataSurface,
const nsACString& aMimeType,
const nsAString& aOutputOptions,
nsIInputStream** aStream) {
DataSourceSurface::ScopedMap map(aDataSurface, DataSourceSurface::READ);
if (!map.IsMapped()) {
return NS_ERROR_FAILURE;
}
return EncodeImageData(aDataSurface, map, aMimeType, aOutputOptions, aStream);
}
NS_IMETHODIMP
imgTools::EncodeImage(imgIContainer* aContainer, const nsACString& aMimeType,
const nsAString& aOutputOptions,
nsIInputStream** aStream) {
// Use frame 0 from the image container.
RefPtr<SourceSurface> frame = aContainer->GetFrame(
imgIContainer::FRAME_FIRST, imgIContainer::FLAG_SYNC_DECODE);
NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
RefPtr<DataSourceSurface> dataSurface;
if (frame->GetFormat() == SurfaceFormat::B8G8R8A8 ||
frame->GetFormat() == SurfaceFormat::B8G8R8X8) {
dataSurface = frame->GetDataSurface();
} else {
// Convert format to SurfaceFormat::B8G8R8A8
dataSurface = gfxUtils::CopySurfaceToDataSourceSurfaceWithFormat(
frame, SurfaceFormat::B8G8R8A8);
}
NS_ENSURE_TRUE(dataSurface, NS_ERROR_FAILURE);
return EncodeImageData(dataSurface, aMimeType, aOutputOptions, aStream);
}
NS_IMETHODIMP
imgTools::EncodeScaledImage(imgIContainer* aContainer,
const nsACString& aMimeType, int32_t aScaledWidth,
int32_t aScaledHeight,
const nsAString& aOutputOptions,
nsIInputStream** aStream) {
NS_ENSURE_ARG(aScaledWidth >= 0 && aScaledHeight >= 0);
// If no scaled size is specified, we'll just encode the image at its
// original size (no scaling).
if (aScaledWidth == 0 && aScaledHeight == 0) {
return EncodeImage(aContainer, aMimeType, aOutputOptions, aStream);
}
// Retrieve the image's size.
int32_t imageWidth = 0;
int32_t imageHeight = 0;
aContainer->GetWidth(&imageWidth);
aContainer->GetHeight(&imageHeight);
// If the given width or height is zero we'll replace it with the image's
// original dimensions.
IntSize scaledSize(aScaledWidth == 0 ? imageWidth : aScaledWidth,
aScaledHeight == 0 ? imageHeight : aScaledHeight);
// Use frame 0 from the image container.
RefPtr<SourceSurface> frame =
aContainer->GetFrameAtSize(scaledSize, imgIContainer::FRAME_FIRST,
imgIContainer::FLAG_HIGH_QUALITY_SCALING |
imgIContainer::FLAG_SYNC_DECODE);
NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
// If the given surface is the right size/format, we can encode it directly.
if (scaledSize == frame->GetSize() &&
(frame->GetFormat() == SurfaceFormat::B8G8R8A8 ||
frame->GetFormat() == SurfaceFormat::B8G8R8X8)) {
RefPtr<DataSourceSurface> dataSurface = frame->GetDataSurface();
if (dataSurface) {
return EncodeImageData(dataSurface, aMimeType, aOutputOptions, aStream);
}
}
// Otherwise we need to scale it using a draw target.
RefPtr<DataSourceSurface> dataSurface =
Factory::CreateDataSourceSurface(scaledSize, SurfaceFormat::B8G8R8A8);
if (NS_WARN_IF(!dataSurface)) {
return NS_ERROR_FAILURE;
}
DataSourceSurface::ScopedMap map(dataSurface, DataSourceSurface::READ_WRITE);
if (!map.IsMapped()) {
return NS_ERROR_FAILURE;
}
RefPtr<DrawTarget> dt = Factory::CreateDrawTargetForData(
BackendType::SKIA, map.GetData(), dataSurface->GetSize(), map.GetStride(),
SurfaceFormat::B8G8R8A8);
if (!dt) {
gfxWarning() << "imgTools::EncodeImage failed in CreateDrawTargetForData";
return NS_ERROR_OUT_OF_MEMORY;
}
IntSize frameSize = frame->GetSize();
dt->DrawSurface(frame, Rect(0, 0, scaledSize.width, scaledSize.height),
Rect(0, 0, frameSize.width, frameSize.height),
DrawSurfaceOptions(),
DrawOptions(1.0f, CompositionOp::OP_SOURCE));
return EncodeImageData(dataSurface, map, aMimeType, aOutputOptions, aStream);
}
NS_IMETHODIMP
imgTools::EncodeCroppedImage(imgIContainer* aContainer,
const nsACString& aMimeType, int32_t aOffsetX,
int32_t aOffsetY, int32_t aWidth, int32_t aHeight,
const nsAString& aOutputOptions,
nsIInputStream** aStream) {
NS_ENSURE_ARG(aOffsetX >= 0 && aOffsetY >= 0 && aWidth >= 0 && aHeight >= 0);
// Offsets must be zero when no width and height are given or else we're out
// of bounds.
NS_ENSURE_ARG(aWidth + aHeight > 0 || aOffsetX + aOffsetY == 0);
// If no size is specified then we'll preserve the image's original dimensions
// and don't need to crop.
if (aWidth == 0 && aHeight == 0) {
return EncodeImage(aContainer, aMimeType, aOutputOptions, aStream);
}
// Use frame 0 from the image container.
RefPtr<SourceSurface> frame = aContainer->GetFrame(
imgIContainer::FRAME_FIRST, imgIContainer::FLAG_SYNC_DECODE);
NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
int32_t frameWidth = frame->GetSize().width;
int32_t frameHeight = frame->GetSize().height;
// If the given width or height is zero we'll replace it with the image's
// original dimensions.
if (aWidth == 0) {
aWidth = frameWidth;
} else if (aHeight == 0) {
aHeight = frameHeight;
}
// Check that the given crop rectangle is within image bounds.
NS_ENSURE_ARG(frameWidth >= aOffsetX + aWidth &&
frameHeight >= aOffsetY + aHeight);
RefPtr<DataSourceSurface> dataSurface = Factory::CreateDataSourceSurface(
IntSize(aWidth, aHeight), SurfaceFormat::B8G8R8A8,
/* aZero = */ true);
if (NS_WARN_IF(!dataSurface)) {
return NS_ERROR_FAILURE;
}
DataSourceSurface::ScopedMap map(dataSurface, DataSourceSurface::READ_WRITE);
if (!map.IsMapped()) {
return NS_ERROR_FAILURE;
}
RefPtr<DrawTarget> dt = Factory::CreateDrawTargetForData(
BackendType::SKIA, map.GetData(), dataSurface->GetSize(), map.GetStride(),
SurfaceFormat::B8G8R8A8);
if (!dt) {
gfxWarning()
<< "imgTools::EncodeCroppedImage failed in CreateDrawTargetForData";
return NS_ERROR_OUT_OF_MEMORY;
}
dt->CopySurface(frame, IntRect(aOffsetX, aOffsetY, aWidth, aHeight),
IntPoint(0, 0));
return EncodeImageData(dataSurface, map, aMimeType, aOutputOptions, aStream);
}
NS_IMETHODIMP
imgTools::CreateScriptedObserver(imgIScriptedNotificationObserver* aInner,
imgINotificationObserver** aObserver) {
NS_ADDREF(*aObserver = new ScriptedNotificationObserver(aInner));
return NS_OK;
}
NS_IMETHODIMP
imgTools::GetImgLoaderForDocument(nsIDocument* aDoc, imgILoader** aLoader) {
NS_IF_ADDREF(*aLoader = nsContentUtils::GetImgLoaderForDocument(aDoc));
return NS_OK;
}
NS_IMETHODIMP
imgTools::GetImgCacheForDocument(nsIDocument* aDoc, imgICache** aCache) {
nsCOMPtr<imgILoader> loader;
nsresult rv = GetImgLoaderForDocument(aDoc, getter_AddRefs(loader));
NS_ENSURE_SUCCESS(rv, rv);
return CallQueryInterface(loader, aCache);
}
} // namespace image
} // namespace mozilla
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