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| 1 | +// Copyright 2024 The Chromium Authors |
| 2 | +// Use of this source code is governed by a BSD-style license that can be |
| 3 | +// found in the LICENSE file. |
| 4 | + |
| 5 | +#include "wolvic/browser/autocomplete/wolvic_image_decoder.h" |
| 6 | + |
| 7 | +#include <vector> |
| 8 | + |
| 9 | +#include "base/functional/callback.h" |
| 10 | +#include "base/memory/raw_ptr.h" |
| 11 | +#include "base/ranges/algorithm.h" |
| 12 | +#include "base/task/sequenced_task_runner.h" |
| 13 | +#include "base/task/single_thread_task_runner.h" |
| 14 | +#include "ipc/ipc_channel.h" |
| 15 | +#include "services/data_decoder/public/cpp/data_decoder.h" |
| 16 | +#include "services/data_decoder/public/cpp/decode_image.h" |
| 17 | +#include "ui/gfx/geometry/size.h" |
| 18 | +#include "ui/gfx/image/image.h" |
| 19 | + |
| 20 | +// Referred to image_decoder_impl.cc & image_decoder.cc in //chrome |
| 21 | +namespace wolvic { |
| 22 | + |
| 23 | +namespace { |
| 24 | + |
| 25 | +const int64_t kMaxImageSizeInBytes = |
| 26 | + static_cast<int64_t>(IPC::Channel::kMaximumMessageSize); |
| 27 | + |
| 28 | +void RunDecodeCallbackOnTaskRunner( |
| 29 | + data_decoder::DecodeImageCallback callback, |
| 30 | + scoped_refptr<base::SequencedTaskRunner> task_runner, |
| 31 | + const SkBitmap& image) { |
| 32 | + task_runner->PostTask(FROM_HERE, base::BindOnce(std::move(callback), image)); |
| 33 | +} |
| 34 | + |
| 35 | +// Note that this is always called on the thread which initiated the |
| 36 | +// corresponding data_decoder::DecodeImage request. |
| 37 | +void OnDecodeImageDone( |
| 38 | + base::OnceCallback<void()> fail_callback, |
| 39 | + base::OnceCallback<void(const SkBitmap&)> success_callback, |
| 40 | + const SkBitmap& image) { |
| 41 | + if (!image.isNull() && !image.empty()) |
| 42 | + std::move(success_callback).Run(image); |
| 43 | + else |
| 44 | + std::move(fail_callback).Run(); |
| 45 | +} |
| 46 | + |
| 47 | +} // namespace |
| 48 | + |
| 49 | +// A request for decoding an image. |
| 50 | +class WolvicImageDecoder::DecodeImageRequest { |
| 51 | + public: |
| 52 | + DecodeImageRequest(WolvicImageDecoder* decoder, |
| 53 | + const std::string& image_data, |
| 54 | + data_decoder::DataDecoder* data_decoder, |
| 55 | + const gfx::Size& desired_image_frame_size, |
| 56 | + image_fetcher::ImageDecodedCallback callback) |
| 57 | + : task_runner_(base::SingleThreadTaskRunner::GetCurrentDefault()), |
| 58 | + data_decoder_(data_decoder), |
| 59 | + callback_(std::move(callback)) { |
| 60 | + DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_); |
| 61 | + base::span<const uint8_t> image_data_span( |
| 62 | + base::as_bytes(base::make_span(image_data))); |
| 63 | + |
| 64 | + auto decode_callback = |
| 65 | + base::BindOnce(&OnDecodeImageDone, |
| 66 | + base::BindOnce(&DecodeImageRequest::OnDecodeImageFailed, |
| 67 | + base::Unretained(this)), |
| 68 | + base::BindOnce(&DecodeImageRequest::OnDecodeImageSucceeded, |
| 69 | + base::Unretained(this))); |
| 70 | + |
| 71 | + data_decoder::DecodeImage( |
| 72 | + data_decoder, image_data_span, |
| 73 | + data_decoder::mojom::ImageCodec::kDefault, /*shrink_to_fit=*/false, |
| 74 | + kMaxImageSizeInBytes, desired_image_frame_size, |
| 75 | + base::BindOnce(&RunDecodeCallbackOnTaskRunner, std::move(decode_callback), |
| 76 | + std::move(task_runner_))); |
| 77 | + } |
| 78 | + |
| 79 | + DecodeImageRequest(const DecodeImageRequest&) = delete; |
| 80 | + DecodeImageRequest& operator=(const DecodeImageRequest&) = delete; |
| 81 | + |
| 82 | + ~DecodeImageRequest() = default; |
| 83 | + |
| 84 | + private: |
| 85 | + SEQUENCE_CHECKER(sequence_checker_); |
| 86 | + |
| 87 | + // Runs the callback and remove the request from the internal request queue. |
| 88 | + void RunCallbackAndRemoveRequest(const gfx::Image& image) { |
| 89 | + std::move(callback_).Run(image); |
| 90 | + |
| 91 | + // This must be the last line in the method body. |
| 92 | + decoder_->RemoveDecodeImageRequest(this); |
| 93 | + } |
| 94 | + |
| 95 | + void OnDecodeImageSucceeded(const SkBitmap& decoded_image) { |
| 96 | + DCHECK(task_runner_->RunsTasksInCurrentSequence()); |
| 97 | + gfx::Image image(gfx::Image::CreateFrom1xBitmap(decoded_image)); |
| 98 | + RunCallbackAndRemoveRequest(image); |
| 99 | + } |
| 100 | + |
| 101 | + void OnDecodeImageFailed() { |
| 102 | + DCHECK(task_runner_->RunsTasksInCurrentSequence()); |
| 103 | + RunCallbackAndRemoveRequest(gfx::Image()); |
| 104 | + } |
| 105 | + |
| 106 | + const scoped_refptr<base::SequencedTaskRunner> task_runner_; |
| 107 | + |
| 108 | + raw_ptr<WolvicImageDecoder> decoder_; |
| 109 | + raw_ptr<data_decoder::DataDecoder> data_decoder_; |
| 110 | + // The callback to call after the request completed. |
| 111 | + image_fetcher::ImageDecodedCallback callback_; |
| 112 | +}; |
| 113 | + |
| 114 | +WolvicImageDecoder::WolvicImageDecoder() = default; |
| 115 | + |
| 116 | +WolvicImageDecoder::~WolvicImageDecoder() = default; |
| 117 | + |
| 118 | +void WolvicImageDecoder::DecodeImage( |
| 119 | + const std::string& image_data, |
| 120 | + const gfx::Size& desired_image_frame_size, |
| 121 | + data_decoder::DataDecoder* data_decoder, |
| 122 | + image_fetcher::ImageDecodedCallback callback) { |
| 123 | + auto decode_image_request = std::make_unique<DecodeImageRequest>( |
| 124 | + this, image_data, data_decoder, desired_image_frame_size, std::move(callback)); |
| 125 | + |
| 126 | + decode_image_requests_.push_back(std::move(decode_image_request)); |
| 127 | +} |
| 128 | + |
| 129 | +void WolvicImageDecoder::RemoveDecodeImageRequest(DecodeImageRequest* request) { |
| 130 | + // Remove the finished request from the request queue. |
| 131 | + auto request_it = |
| 132 | + base::ranges::find(decode_image_requests_, request, |
| 133 | + &std::unique_ptr<DecodeImageRequest>::get); |
| 134 | + DCHECK(request_it != decode_image_requests_.end()); |
| 135 | + decode_image_requests_.erase(request_it); |
| 136 | +} |
| 137 | + |
| 138 | +} // namespace wolvic |
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