| OLD | NEW |
| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "chrome/utility/image_decoder_impl.h" | 5 #include "chrome/utility/image_decoder_impl.h" |
| 6 | 6 |
| 7 #include <string.h> | 7 #include <string.h> |
| 8 | 8 |
| 9 #include <utility> | 9 #include <utility> |
| 10 | 10 |
| (...skipping 16 matching lines...) Expand all Loading... |
| 27 } | 27 } |
| 28 | 28 |
| 29 ImageDecoderImpl::ImageDecoderImpl() : ImageDecoderImpl(kMaxMessageSize) {} | 29 ImageDecoderImpl::ImageDecoderImpl() : ImageDecoderImpl(kMaxMessageSize) {} |
| 30 | 30 |
| 31 ImageDecoderImpl::ImageDecoderImpl(int64_t max_message_size) | 31 ImageDecoderImpl::ImageDecoderImpl(int64_t max_message_size) |
| 32 : max_message_size_(max_message_size) {} | 32 : max_message_size_(max_message_size) {} |
| 33 | 33 |
| 34 ImageDecoderImpl::~ImageDecoderImpl() { | 34 ImageDecoderImpl::~ImageDecoderImpl() { |
| 35 } | 35 } |
| 36 | 36 |
| 37 void ImageDecoderImpl::DecodeImage( | 37 void ImageDecoderImpl::DecodeImage(const std::vector<uint8_t>& encoded_data, |
| 38 mojo::Array<uint8_t> encoded_data, | 38 mojom::ImageCodec codec, |
| 39 mojom::ImageCodec codec, | 39 bool shrink_to_fit, |
| 40 bool shrink_to_fit, | 40 const DecodeImageCallback& callback) { |
| 41 const DecodeImageCallback& callback) { | 41 if (encoded_data.empty()) { |
| 42 if (encoded_data.size() == 0) { | |
| 43 callback.Run(SkBitmap()); | 42 callback.Run(SkBitmap()); |
| 44 return; | 43 return; |
| 45 } | 44 } |
| 46 | 45 |
| 47 SkBitmap decoded_image; | 46 SkBitmap decoded_image; |
| 48 #if defined(OS_CHROMEOS) | 47 #if defined(OS_CHROMEOS) |
| 49 if (codec == mojom::ImageCodec::ROBUST_JPEG) { | 48 if (codec == mojom::ImageCodec::ROBUST_JPEG) { |
| 50 // Our robust jpeg decoding is using IJG libjpeg. | 49 // Our robust jpeg decoding is using IJG libjpeg. |
| 51 if (encoded_data.size()) { | 50 std::unique_ptr<SkBitmap> decoded_jpeg(gfx::JPEGCodecRobustSlow::Decode( |
| 52 std::unique_ptr<SkBitmap> decoded_jpeg(gfx::JPEGCodecRobustSlow::Decode( | 51 encoded_data.data(), encoded_data.size())); |
| 53 encoded_data.storage().data(), encoded_data.size())); | 52 if (decoded_jpeg.get() && !decoded_jpeg->empty()) |
| 54 if (decoded_jpeg.get() && !decoded_jpeg->empty()) | 53 decoded_image = *decoded_jpeg; |
| 55 decoded_image = *decoded_jpeg; | |
| 56 } | |
| 57 } else if (codec == mojom::ImageCodec::ROBUST_PNG) { | 54 } else if (codec == mojom::ImageCodec::ROBUST_PNG) { |
| 58 // Our robust PNG decoding is using libpng. | 55 // Our robust PNG decoding is using libpng. |
| 59 if (encoded_data.size()) { | 56 SkBitmap decoded_png; |
| 60 SkBitmap decoded_png; | 57 if (gfx::PNGCodec::Decode(encoded_data.data(), encoded_data.size(), |
| 61 if (gfx::PNGCodec::Decode(encoded_data.storage().data(), | 58 &decoded_png)) { |
| 62 encoded_data.size(), &decoded_png)) { | 59 decoded_image = decoded_png; |
| 63 decoded_image = decoded_png; | |
| 64 } | |
| 65 } | 60 } |
| 66 } | 61 } |
| 67 #endif // defined(OS_CHROMEOS) | 62 #endif // defined(OS_CHROMEOS) |
| 68 if (codec == mojom::ImageCodec::DEFAULT) { | 63 if (codec == mojom::ImageCodec::DEFAULT) { |
| 69 decoded_image = content::DecodeImage(encoded_data.storage().data(), | 64 decoded_image = content::DecodeImage(encoded_data.data(), gfx::Size(), |
| 70 gfx::Size(), encoded_data.size()); | 65 encoded_data.size()); |
| 71 } | 66 } |
| 72 | 67 |
| 73 if (!decoded_image.isNull()) { | 68 if (!decoded_image.isNull()) { |
| 74 // When serialized, the space taken up by a skia::mojom::Bitmap excluding | 69 // When serialized, the space taken up by a skia::mojom::Bitmap excluding |
| 75 // the pixel data payload should be: | 70 // the pixel data payload should be: |
| 76 // sizeof(skia::mojom::Bitmap::Data_) + pixel data array header (8 bytes) | 71 // sizeof(skia::mojom::Bitmap::Data_) + pixel data array header (8 bytes) |
| 77 // Use a bigger number in case we need padding at the end. | 72 // Use a bigger number in case we need padding at the end. |
| 78 int64_t struct_size = sizeof(skia::mojom::Bitmap::Data_) + kPadding; | 73 int64_t struct_size = sizeof(skia::mojom::Bitmap::Data_) + kPadding; |
| 79 int64_t image_size = decoded_image.computeSize64(); | 74 int64_t image_size = decoded_image.computeSize64(); |
| 80 int halves = 0; | 75 int halves = 0; |
| 81 while (struct_size + (image_size >> 2 * halves) > max_message_size_) | 76 while (struct_size + (image_size >> 2 * halves) > max_message_size_) |
| 82 halves++; | 77 halves++; |
| 83 if (halves) { | 78 if (halves) { |
| 84 if (shrink_to_fit) { | 79 if (shrink_to_fit) { |
| 85 // If decoded image is too large for IPC message, shrink it by halves. | 80 // If decoded image is too large for IPC message, shrink it by halves. |
| 86 // This prevents quality loss, and should never overshrink on displays | 81 // This prevents quality loss, and should never overshrink on displays |
| 87 // smaller than 3600x2400. | 82 // smaller than 3600x2400. |
| 88 // TODO (Issue 416916): Instead of shrinking, return via shared memory | 83 // TODO (Issue 416916): Instead of shrinking, return via shared memory |
| 89 decoded_image = skia::ImageOperations::Resize( | 84 decoded_image = skia::ImageOperations::Resize( |
| 90 decoded_image, skia::ImageOperations::RESIZE_LANCZOS3, | 85 decoded_image, skia::ImageOperations::RESIZE_LANCZOS3, |
| 91 decoded_image.width() >> halves, decoded_image.height() >> halves); | 86 decoded_image.width() >> halves, decoded_image.height() >> halves); |
| 92 } else { | 87 } else { |
| 93 decoded_image.reset(); | 88 decoded_image.reset(); |
| 94 } | 89 } |
| 95 } | 90 } |
| 96 } | 91 } |
| 97 | 92 |
| 98 callback.Run(decoded_image); | 93 callback.Run(decoded_image); |
| 99 } | 94 } |
| OLD | NEW |