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52fd41bc88
I also fixed image_cache to not even bother to call ImageDecoder in the 404 case, but I also fixed CanvasImageDecoder not to blow up if the buffer is empty and its not able to allocate an ImageDecoder. Closes https://github.com/domokit/mojo/issues/229 R=abarth@chromium.org, jackson@google.com Review URL: https://codereview.chromium.org/1170413002.
57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "sky/engine/config.h"
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#include "sky/engine/core/loader/CanvasImageDecoder.h"
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#include "sky/engine/core/painting/CanvasImage.h"
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#include "sky/engine/platform/SharedBuffer.h"
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#include "sky/engine/platform/image-decoders/ImageDecoder.h"
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namespace blink {
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PassRefPtr<CanvasImageDecoder> CanvasImageDecoder::create(
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mojo::ScopedDataPipeConsumerHandle handle,
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PassOwnPtr<ImageDecoderCallback> callback)
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{
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return adoptRef(new CanvasImageDecoder(handle.Pass(), callback));
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}
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CanvasImageDecoder::CanvasImageDecoder(
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mojo::ScopedDataPipeConsumerHandle handle,
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PassOwnPtr<ImageDecoderCallback> callback)
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: callback_(callback) {
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CHECK(callback_);
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buffer_ = SharedBuffer::create();
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drainer_ = adoptPtr(new mojo::common::DataPipeDrainer(this, handle.Pass()));
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}
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CanvasImageDecoder::~CanvasImageDecoder() {
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}
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void CanvasImageDecoder::OnDataAvailable(const void* data, size_t num_bytes) {
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buffer_->append(static_cast<const char*>(data), num_bytes);
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}
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void CanvasImageDecoder::OnDataComplete() {
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OwnPtr<ImageDecoder> decoder =
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ImageDecoder::create(*buffer_.get(), ImageSource::AlphaPremultiplied,
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ImageSource::GammaAndColorProfileIgnored);
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// decoder can be null if the buffer we was empty and we couldn't even guess
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// what type of image to decode.
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if (!decoder) {
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callback_->handleEvent(nullptr);
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return;
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}
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decoder->setData(buffer_.get(), true);
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if (decoder->failed() || decoder->frameCount() == 0) {
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callback_->handleEvent(nullptr);
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return;
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}
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RefPtr<CanvasImage> resultImage = CanvasImage::create();
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resultImage->setBitmap(decoder->frameBufferAtIndex(0)->getSkBitmap());
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callback_->handleEvent(resultImage.get());
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}
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} // namespace blink
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