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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/image_fetcher/image_decoder_impl.h"
#include <algorithm>
#include <vector>
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/image/image.h"
// A request for decoding an image.
class ImageDecoderImpl::DecodeImageRequest
: public ::ImageDecoder::ImageRequest {
public:
DecodeImageRequest(ImageDecoderImpl* decoder,
data_decoder::DataDecoder* data_decoder,
image_fetcher::ImageDecodedCallback callback)
: ImageRequest(data_decoder),
decoder_(decoder),
callback_(std::move(callback)) {}
DecodeImageRequest(const DecodeImageRequest&) = delete;
DecodeImageRequest& operator=(const DecodeImageRequest&) = delete;
~DecodeImageRequest() override = default;
private:
// Runs the callback and remove the request from the internal request queue.
void RunCallbackAndRemoveRequest(const gfx::Image& image);
// Methods inherited from ImageDecoder::ImageRequest
void OnImageDecoded(const SkBitmap& decoded_image) override;
void OnDecodeImageFailed() override;
raw_ptr<ImageDecoderImpl> decoder_;
// The callback to call after the request completed.
image_fetcher::ImageDecodedCallback callback_;
};
void ImageDecoderImpl::DecodeImageRequest::OnImageDecoded(
const SkBitmap& decoded_bitmap) {
// TODO(markusheintz): Check whether high res displays that require 2x and 3x
// image versions need to be supported here.
gfx::Image image(gfx::Image::CreateFrom1xBitmap(decoded_bitmap));
RunCallbackAndRemoveRequest(image);
}
// Called when decoding image failed.
void ImageDecoderImpl::DecodeImageRequest::OnDecodeImageFailed() {
RunCallbackAndRemoveRequest(gfx::Image());
}
void ImageDecoderImpl::DecodeImageRequest::RunCallbackAndRemoveRequest(
const gfx::Image& image) {
std::move(callback_).Run(image);
// This must be the last line in the method body.
decoder_->RemoveDecodeImageRequest(this);
}
ImageDecoderImpl::ImageDecoderImpl() = default;
ImageDecoderImpl::~ImageDecoderImpl() = default;
void ImageDecoderImpl::DecodeImage(
const std::string& image_data,
const gfx::Size& desired_image_frame_size,
data_decoder::DataDecoder* data_decoder,
image_fetcher::ImageDecodedCallback callback) {
std::unique_ptr<DecodeImageRequest> decode_image_request(
new DecodeImageRequest(this, data_decoder, std::move(callback)));
::ImageDecoder::StartWithOptions(
decode_image_request.get(), image_data, ::ImageDecoder::DEFAULT_CODEC,
/*shrink_to_fit=*/false, desired_image_frame_size);
decode_image_requests_.push_back(std::move(decode_image_request));
}
void ImageDecoderImpl::RemoveDecodeImageRequest(DecodeImageRequest* request) {
// Remove the finished request from the request queue.
auto request_it =
std::ranges::find(decode_image_requests_, request,
&std::unique_ptr<DecodeImageRequest>::get);
CHECK(request_it != decode_image_requests_.end());
decode_image_requests_.erase(request_it);
}
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