Source code
Revision control
Copy as Markdown
Other Tools
/* -*- 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
#include "ImageOps.h"
#include "ClippedImage.h"
#include "Decoder.h"
#include "DecoderFactory.h"
#include "DynamicImage.h"
#include "FrozenImage.h"
#include "IDecodingTask.h"
#include "Image.h"
#include "ImageMetadata.h"
#include "imgIContainer.h"
#include "mozilla/gfx/2D.h"
#include "nsNetUtil.h" // for NS_NewBufferedInputStream
#include "nsStreamUtils.h"
#include "OrientedImage.h"
#include "SourceBuffer.h"
using namespace mozilla::gfx;
namespace mozilla::image {
/* static */
already_AddRefed<Image> ImageOps::Freeze(Image* aImage) {
RefPtr<Image> frozenImage = new FrozenImage(aImage);
return frozenImage.forget();
}
/* static */
already_AddRefed<imgIContainer> ImageOps::Freeze(imgIContainer* aImage) {
nsCOMPtr<imgIContainer> frozenImage =
new FrozenImage(static_cast<Image*>(aImage));
return frozenImage.forget();
}
/* static */
already_AddRefed<Image> ImageOps::Clip(Image* aImage, nsIntRect aClip,
const Maybe<nsSize>& aSVGViewportSize) {
RefPtr<Image> clippedImage =
new ClippedImage(aImage, aClip, aSVGViewportSize);
return clippedImage.forget();
}
/* static */
already_AddRefed<imgIContainer> ImageOps::Clip(
imgIContainer* aImage, nsIntRect aClip,
const Maybe<nsSize>& aSVGViewportSize) {
nsCOMPtr<imgIContainer> clippedImage =
new ClippedImage(static_cast<Image*>(aImage), aClip, aSVGViewportSize);
return clippedImage.forget();
}
/* static */
already_AddRefed<Image> ImageOps::Orient(Image* aImage,
Orientation aOrientation) {
if (aOrientation.IsIdentity()) {
return do_AddRef(aImage);
}
RefPtr<Image> image = new OrientedImage(aImage, aOrientation);
return image.forget();
}
/* static */
already_AddRefed<imgIContainer> ImageOps::Orient(imgIContainer* aImage,
Orientation aOrientation) {
return Orient(static_cast<Image*>(aImage), aOrientation);
}
/* static */
already_AddRefed<imgIContainer> ImageOps::Unorient(imgIContainer* aImage) {
return Orient(aImage, aImage->GetOrientation().Reversed());
}
/* static */
already_AddRefed<imgIContainer> ImageOps::CreateFromDrawable(
gfxDrawable* aDrawable) {
nsCOMPtr<imgIContainer> drawableImage = new DynamicImage(aDrawable);
return drawableImage.forget();
}
class ImageOps::ImageBufferImpl final : public ImageOps::ImageBuffer {
public:
explicit ImageBufferImpl(already_AddRefed<SourceBuffer> aSourceBuffer)
: mSourceBuffer(aSourceBuffer) {}
protected:
~ImageBufferImpl() override {}
already_AddRefed<SourceBuffer> GetSourceBuffer() const override {
RefPtr<SourceBuffer> sourceBuffer = mSourceBuffer;
return sourceBuffer.forget();
}
private:
RefPtr<SourceBuffer> mSourceBuffer;
};
/* static */ already_AddRefed<ImageOps::ImageBuffer>
ImageOps::CreateImageBuffer(already_AddRefed<nsIInputStream> aInputStream) {
nsCOMPtr<nsIInputStream> inputStream = std::move(aInputStream);
MOZ_ASSERT(inputStream);
nsresult rv;
// Prepare the input stream.
if (!NS_InputStreamIsBuffered(inputStream)) {
nsCOMPtr<nsIInputStream> bufStream;
rv = NS_NewBufferedInputStream(getter_AddRefs(bufStream),
inputStream.forget(), 1024);
if (NS_WARN_IF(NS_FAILED(rv))) {
return nullptr;
}
inputStream = std::move(bufStream);
}
// Figure out how much data we've been passed.
uint64_t length;
rv = inputStream->Available(&length);
if (NS_FAILED(rv) || length > UINT32_MAX) {
return nullptr;
}
// Write the data into a SourceBuffer.
RefPtr<SourceBuffer> sourceBuffer = new SourceBuffer();
sourceBuffer->ExpectLength(length);
rv = sourceBuffer->AppendFromInputStream(inputStream, length);
if (NS_FAILED(rv)) {
return nullptr;
}
// Make sure our sourceBuffer is marked as complete.
if (sourceBuffer->IsComplete()) {
NS_WARNING(
"The SourceBuffer was unexpectedly marked as complete. This may "
"indicate either an OOM condition, or that imagelib was not "
"initialized properly.");
return nullptr;
}
sourceBuffer->Complete(NS_OK);
RefPtr<ImageBuffer> imageBuffer = new ImageBufferImpl(sourceBuffer.forget());
return imageBuffer.forget();
}
/* static */
nsresult ImageOps::DecodeMetadata(already_AddRefed<nsIInputStream> aInputStream,
const nsACString& aMimeType,
ImageMetadata& aMetadata) {
nsCOMPtr<nsIInputStream> inputStream = std::move(aInputStream);
RefPtr<ImageBuffer> buffer = CreateImageBuffer(inputStream.forget());
return DecodeMetadata(buffer, aMimeType, aMetadata);
}
/* static */
nsresult ImageOps::DecodeMetadata(ImageBuffer* aBuffer,
const nsACString& aMimeType,
ImageMetadata& aMetadata) {
if (!aBuffer) {
return NS_ERROR_FAILURE;
}
RefPtr<SourceBuffer> sourceBuffer = aBuffer->GetSourceBuffer();
if (NS_WARN_IF(!sourceBuffer)) {
return NS_ERROR_FAILURE;
}
// Create a decoder.
DecoderType decoderType =
DecoderFactory::GetDecoderType(PromiseFlatCString(aMimeType).get());
RefPtr<Decoder> decoder = DecoderFactory::CreateAnonymousMetadataDecoder(
decoderType, WrapNotNull(sourceBuffer));
if (!decoder) {
return NS_ERROR_FAILURE;
}
// Run the decoder synchronously.
RefPtr<IDecodingTask> task =
new AnonymousDecodingTask(WrapNotNull(decoder), /* aResumable */ false);
task->Run();
if (!decoder->GetDecodeDone() || decoder->HasError()) {
return NS_ERROR_FAILURE;
}
aMetadata = decoder->GetImageMetadata();
if (aMetadata.GetNativeSizes().IsEmpty() && aMetadata.HasSize()) {
aMetadata.AddNativeSize(aMetadata.GetSize());
}
return NS_OK;
}
/* static */ already_AddRefed<gfx::SourceSurface> ImageOps::DecodeToSurface(
already_AddRefed<nsIInputStream> aInputStream, const nsACString& aMimeType,
uint32_t aFlags, const Maybe<IntSize>& aSize /* = Nothing() */) {
nsCOMPtr<nsIInputStream> inputStream = std::move(aInputStream);
RefPtr<ImageBuffer> buffer = CreateImageBuffer(inputStream.forget());
return DecodeToSurface(buffer, aMimeType, aFlags, aSize);
}
/* static */ already_AddRefed<gfx::SourceSurface> ImageOps::DecodeToSurface(
ImageBuffer* aBuffer, const nsACString& aMimeType, uint32_t aFlags,
const Maybe<IntSize>& aSize /* = Nothing() */) {
if (!aBuffer) {
return nullptr;
}
RefPtr<SourceBuffer> sourceBuffer = aBuffer->GetSourceBuffer();
if (NS_WARN_IF(!sourceBuffer)) {
return nullptr;
}
// Create a decoder.
DecoderType decoderType =
DecoderFactory::GetDecoderType(PromiseFlatCString(aMimeType).get());
RefPtr<Decoder> decoder = DecoderFactory::CreateAnonymousDecoder(
decoderType, WrapNotNull(sourceBuffer), aSize,
DecoderFlags::FIRST_FRAME_ONLY, ToSurfaceFlags(aFlags));
if (!decoder) {
return nullptr;
}
// Run the decoder synchronously.
RefPtr<IDecodingTask> task =
new AnonymousDecodingTask(WrapNotNull(decoder), /* aResumable */ false);
task->Run();
if (!decoder->GetDecodeDone() || decoder->HasError()) {
return nullptr;
}
// Pull out the surface.
RawAccessFrameRef frame = decoder->GetCurrentFrameRef();
if (!frame) {
return nullptr;
}
RefPtr<SourceSurface> surface = frame->GetSourceSurface();
if (!surface) {
return nullptr;
}
return surface.forget();
}
} // namespace mozilla::image