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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
| 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 "services/image_decoder/image_decoder_impl.h" | |
| 6 | |
| 7 #include <string.h> | |
| 8 | |
| 9 #include <utility> | |
| 10 | |
| 11 #include "base/logging.h" | |
| 12 #include "content/public/child/image_decoder_utils.h" | |
| 13 #include "mojo/public/cpp/bindings/strong_binding.h" | |
| 14 #include "skia/ext/image_operations.h" | |
| 15 #include "third_party/skia/include/core/SkBitmap.h" | |
| 16 | |
| 17 #if defined(OS_CHROMEOS) | |
| 18 #include "ui/gfx/codec/chromeos/jpeg_codec_robust_slow.h" | |
| 19 #include "ui/gfx/codec/png_codec.h" | |
| 20 #endif | |
| 21 | |
| 22 namespace image_decoder { | |
| 23 | |
| 24 namespace { | |
| 25 | |
| 26 int64_t kPadding = 64; | |
| 27 | |
| 28 } // namespace | |
| 29 | |
| 30 ImageDecoderImpl::ImageDecoderImpl( | |
| 31 std::unique_ptr<service_manager::ServiceContextRef> service_ref) | |
| 32 : service_ref_(std::move(service_ref)) {} | |
| 33 | |
| 34 ImageDecoderImpl::~ImageDecoderImpl() = default; | |
| 35 | |
| 36 void ImageDecoderImpl::DecodeImage(const std::vector<uint8_t>& encoded_data, | |
| 37 mojom::ImageCodec codec, | |
| 38 bool shrink_to_fit, | |
| 39 int64_t max_size_in_bytes, | |
| 40 const gfx::Size& desired_image_frame_size, | |
| 41 const DecodeImageCallback& callback) { | |
| 42 if (encoded_data.size() == 0) { | |
| 43 callback.Run(SkBitmap()); | |
| 44 return; | |
| 45 } | |
| 46 | |
| 47 SkBitmap decoded_image; | |
| 48 #if defined(OS_CHROMEOS) | |
| 49 if (codec == mojom::ImageCodec::ROBUST_JPEG) { | |
| 50 // Our robust jpeg decoding is using IJG libjpeg. | |
| 51 if (encoded_data.size()) { | |
| 52 std::unique_ptr<SkBitmap> decoded_jpeg(gfx::JPEGCodecRobustSlow::Decode( | |
| 53 encoded_data.data(), encoded_data.size())); | |
| 54 if (decoded_jpeg.get() && !decoded_jpeg->empty()) | |
| 55 decoded_image = *decoded_jpeg; | |
| 56 } | |
| 57 } else if (codec == mojom::ImageCodec::ROBUST_PNG) { | |
| 58 // Our robust PNG decoding is using libpng. | |
| 59 if (encoded_data.size()) { | |
| 60 SkBitmap decoded_png; | |
| 61 if (gfx::PNGCodec::Decode( | |
| 62 encoded_data.data(), encoded_data.size(), &decoded_png)) { | |
| 63 decoded_image = decoded_png; | |
| 64 } | |
| 65 } | |
| 66 } | |
| 67 #endif // defined(OS_CHROMEOS) | |
| 68 if (codec == mojom::ImageCodec::DEFAULT) { | |
| 69 decoded_image = content::DecodeImage( | |
| 70 encoded_data.data(), desired_image_frame_size, encoded_data.size()); | |
| 71 } | |
| 72 | |
| 73 if (!decoded_image.isNull()) { | |
| 74 // When serialized, the space taken up by a skia::mojom::Bitmap excluding | |
| 75 // the pixel data payload should be: | |
| 76 // sizeof(skia::mojom::Bitmap::Data_) + pixel data array header (8 bytes) | |
| 77 // Use a bigger number in case we need padding at the end. | |
| 78 int64_t struct_size = sizeof(skia::mojom::Bitmap::Data_) + kPadding; | |
| 79 int64_t image_size = decoded_image.computeSize64(); | |
| 80 int halves = 0; | |
| 81 while (struct_size + (image_size >> 2 * halves) > max_size_in_bytes) | |
| 82 halves++; | |
| 83 if (halves) { | |
| 84 // If the decoded image is too large, either discard it or shrink it. | |
| 85 // | |
| 86 // TODO(rockot): Also support exposing the bytes via shared memory for | |
| 87 // larger images. https://crbug.com/416916. | |
| 88 if (shrink_to_fit) { | |
| 89 // Shrinking by halves prevents quality loss and should never overshrink | |
| 90 // on displays smaller than 3600x2400. | |
| 91 decoded_image = skia::ImageOperations::Resize( | |
| 92 decoded_image, skia::ImageOperations::RESIZE_LANCZOS3, | |
| 93 decoded_image.width() >> halves, decoded_image.height() >> halves); | |
| 94 } else { | |
| 95 decoded_image.reset(); | |
| 96 } | |
| 97 } | |
| 98 } | |
| 99 | |
| 100 callback.Run(decoded_image); | |
| 101 } | |
| 102 | |
| 103 } // namespace image_decoder | |
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Chromium Code Reviews
Issue 2774463002:
image_decoder service -> data_decoder service (Closed)
