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/* 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 "ImageDecoderSupport.h"
#include "imgINotificationObserver.h"
#include "imgITools.h"
#include "imgINotificationObserver.h"
#include "gfxUtils.h"
#include "AndroidGraphics.h"
#include "JavaExceptions.h"
#include "mozilla/gfx/Point.h"
#include "mozilla/gfx/Swizzle.h"
#include "mozilla/java/ImageWrappers.h"
#include "nsNetUtil.h"
using namespace mozilla::gfx;
namespace mozilla {
namespace widget {
namespace {
class ImageCallbackHelper;
HashSet<RefPtr<ImageCallbackHelper>, PointerHasher<ImageCallbackHelper*>>
gDecodeRequests;
class ImageCallbackHelper : public imgIContainerCallback,
public imgINotificationObserver {
public:
NS_DECL_ISUPPORTS
void CompleteExceptionally(nsresult aRv) {
nsPrintfCString error("Could not process image: 0x%08X", aRv);
mResult->CompleteExceptionally(
java::Image::ImageProcessingException::New(error.get())
.Cast<jni::Throwable>());
gDecodeRequests.remove(this);
}
void Complete(DataSourceSurface::ScopedMap& aSourceSurface, int32_t width,
int32_t height) {
auto pixels = mozilla::jni::ByteBuffer::New(
reinterpret_cast<int8_t*>(aSourceSurface.GetData()),
aSourceSurface.GetStride() * height);
auto bitmap = java::sdk::Bitmap::CreateBitmap(
width, height, java::sdk::Bitmap::Config::ARGB_8888());
bitmap->CopyPixelsFromBuffer(pixels);
mResult->Complete(bitmap);
gDecodeRequests.remove(this);
}
ImageCallbackHelper(java::GeckoResult::Param aResult, int32_t aDesiredLength)
: mResult(aResult), mDesiredLength(aDesiredLength), mImage(nullptr) {
MOZ_ASSERT(mResult);
}
NS_IMETHOD
OnImageReady(imgIContainer* aImage, nsresult aStatus) override {
// Let's make sure we are alive until the request completes
MOZ_ALWAYS_TRUE(gDecodeRequests.putNew(this));
if (NS_FAILED(aStatus)) {
CompleteExceptionally(aStatus);
return aStatus;
}
mImage = aImage;
return mImage->StartDecoding(
imgIContainer::FLAG_SYNC_DECODE | imgIContainer::FLAG_ASYNC_NOTIFY,
imgIContainer::FRAME_FIRST);
}
// This method assumes that the image is ready to be processed
nsresult SendBitmap() {
RefPtr<gfx::SourceSurface> surface;
NS_ENSURE_TRUE(mImage, NS_ERROR_FAILURE);
if (mDesiredLength > 0) {
surface = mImage->GetFrameAtSize(
gfx::IntSize(mDesiredLength, mDesiredLength),
imgIContainer::FRAME_FIRST,
imgIContainer::FLAG_SYNC_DECODE | imgIContainer::FLAG_ASYNC_NOTIFY);
} else {
surface = mImage->GetFrame(
imgIContainer::FRAME_FIRST,
imgIContainer::FLAG_SYNC_DECODE | imgIContainer::FLAG_ASYNC_NOTIFY);
}
NS_ENSURE_TRUE(surface, NS_ERROR_FAILURE);
RefPtr<DataSourceSurface> dataSurface = surface->GetDataSurface();
NS_ENSURE_TRUE(dataSurface, NS_ERROR_FAILURE);
int32_t width = dataSurface->GetSize().width;
int32_t height = dataSurface->GetSize().height;
DataSourceSurface::ScopedMap sourceMap(dataSurface,
DataSourceSurface::READ);
// Android's Bitmap only supports R8G8B8A8, so we need to convert the
// data to the right format
RefPtr<DataSourceSurface> destDataSurface =
Factory::CreateDataSourceSurfaceWithStride(dataSurface->GetSize(),
SurfaceFormat::R8G8B8A8,
sourceMap.GetStride());
NS_ENSURE_TRUE(destDataSurface, NS_ERROR_FAILURE);
DataSourceSurface::ScopedMap destMap(destDataSurface,
DataSourceSurface::READ_WRITE);
SwizzleData(sourceMap.GetData(), sourceMap.GetStride(),
surface->GetFormat(), destMap.GetData(), destMap.GetStride(),
SurfaceFormat::R8G8B8A8, destDataSurface->GetSize());
Complete(destMap, width, height);
return NS_OK;
}
void Notify(imgIRequest* aRequest, int32_t aType,
const nsIntRect* aData) override {
if (aType == imgINotificationObserver::DECODE_COMPLETE) {
nsresult status = SendBitmap();
if (NS_FAILED(status)) {
CompleteExceptionally(status);
}
// Breack the cyclic reference between `ImageDecoderListener` (which is a
// `imgIContainer`) and `ImageCallbackHelper`.
mImage = nullptr;
}
}
private:
const java::GeckoResult::GlobalRef mResult;
int32_t mDesiredLength;
nsCOMPtr<imgIContainer> mImage;
virtual ~ImageCallbackHelper() {}
};
NS_IMPL_ISUPPORTS(ImageCallbackHelper, imgIContainerCallback,
imgINotificationObserver)
} // namespace
/* static */ void ImageDecoderSupport::Decode(jni::String::Param aUri,
int32_t aDesiredLength,
jni::Object::Param aResult) {
auto result = java::GeckoResult::LocalRef(aResult);
RefPtr<ImageCallbackHelper> helper =
new ImageCallbackHelper(result, aDesiredLength);
nsresult rv = DecodeInternal(aUri->ToString(), helper, helper);
if (NS_FAILED(rv)) {
helper->OnImageReady(nullptr, rv);
}
}
/* static */ nsresult ImageDecoderSupport::DecodeInternal(
const nsAString& aUri, imgIContainerCallback* aCallback,
imgINotificationObserver* aObserver) {
nsCOMPtr<imgITools> imgTools = do_GetService("@mozilla.org/image/tools;1");
if (NS_WARN_IF(!imgTools)) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_NewURI(getter_AddRefs(uri), aUri);
NS_ENSURE_SUCCESS(rv, NS_ERROR_MALFORMED_URI);
nsCOMPtr<nsIChannel> channel;
rv = NS_NewChannel(getter_AddRefs(channel), uri,
nsContentUtils::GetSystemPrincipal(),
nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_SEC_CONTEXT_IS_NULL,
nsIContentPolicy::TYPE_IMAGE);
NS_ENSURE_SUCCESS(rv, rv);
return imgTools->DecodeImageFromChannelAsync(uri, channel, aCallback,
aObserver);
}
} // namespace widget
} // namespace mozilla
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