mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
8633179599
We shouldn't try to drain a data pipe when we have an invalid handle. Instead, we should just call the callback with |null|, like we do for decoding failures. R=jackson@google.com, jackson@chromium.org Review URL: https://codereview.chromium.org/1213313002.
69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "base/bind.h"
|
|
#include "base/message_loop/message_loop.h"
|
|
#include "sky/engine/core/loader/CanvasImageDecoder.h"
|
|
#include "sky/engine/core/painting/CanvasImage.h"
|
|
#include "sky/engine/platform/SharedBuffer.h"
|
|
#include "sky/engine/platform/image-decoders/ImageDecoder.h"
|
|
|
|
namespace blink {
|
|
|
|
PassRefPtr<CanvasImageDecoder> CanvasImageDecoder::create(
|
|
mojo::ScopedDataPipeConsumerHandle handle,
|
|
PassOwnPtr<ImageDecoderCallback> callback) {
|
|
return adoptRef(new CanvasImageDecoder(handle.Pass(), callback));
|
|
}
|
|
|
|
CanvasImageDecoder::CanvasImageDecoder(
|
|
mojo::ScopedDataPipeConsumerHandle handle,
|
|
PassOwnPtr<ImageDecoderCallback> callback)
|
|
: callback_(callback), weak_factory_(this) {
|
|
CHECK(callback_);
|
|
if (!handle.is_valid()) {
|
|
base::MessageLoop::current()->PostTask(
|
|
FROM_HERE, base::Bind(&CanvasImageDecoder::RejectCallback,
|
|
weak_factory_.GetWeakPtr()));
|
|
return;
|
|
}
|
|
|
|
buffer_ = SharedBuffer::create();
|
|
drainer_ = adoptPtr(new mojo::common::DataPipeDrainer(this, handle.Pass()));
|
|
}
|
|
|
|
CanvasImageDecoder::~CanvasImageDecoder() {
|
|
}
|
|
|
|
void CanvasImageDecoder::OnDataAvailable(const void* data, size_t num_bytes) {
|
|
buffer_->append(static_cast<const char*>(data), num_bytes);
|
|
}
|
|
|
|
void CanvasImageDecoder::OnDataComplete() {
|
|
OwnPtr<ImageDecoder> decoder =
|
|
ImageDecoder::create(*buffer_.get(), ImageSource::AlphaPremultiplied,
|
|
ImageSource::GammaAndColorProfileIgnored);
|
|
// decoder can be null if the buffer we was empty and we couldn't even guess
|
|
// what type of image to decode.
|
|
if (!decoder) {
|
|
callback_->handleEvent(nullptr);
|
|
return;
|
|
}
|
|
decoder->setData(buffer_.get(), true);
|
|
if (decoder->failed() || decoder->frameCount() == 0) {
|
|
callback_->handleEvent(nullptr);
|
|
return;
|
|
}
|
|
|
|
RefPtr<CanvasImage> resultImage = CanvasImage::create();
|
|
resultImage->setBitmap(decoder->frameBufferAtIndex(0)->getSkBitmap());
|
|
callback_->handleEvent(resultImage.get());
|
|
}
|
|
|
|
void CanvasImageDecoder::RejectCallback() {
|
|
callback_->handleEvent(nullptr);
|
|
}
|
|
|
|
} // namespace blink
|