diff options
Diffstat (limited to 'widget/android/ImageDecoderSupport.cpp')
| -rw-r--r-- | widget/android/ImageDecoderSupport.cpp | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/widget/android/ImageDecoderSupport.cpp b/widget/android/ImageDecoderSupport.cpp new file mode 100644 index 0000000000..9bebcc72a6 --- /dev/null +++ b/widget/android/ImageDecoderSupport.cpp @@ -0,0 +1,176 @@ +/* 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 "nsNetUtil.h" + +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(const char* aMessage) { + mResult->CompleteExceptionally( + java::sdk::IllegalArgumentException::New(aMessage) + .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::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("Could not process image."); + 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; + + 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); + } + + 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) { + SendBitmap(); + // 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 |