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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 "chrome/utility/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 "ipc/ipc_channel.h" | |
14 #include "skia/ext/image_operations.h" | |
15 #include "skia/public/type_converters.h" | |
16 #include "third_party/skia/include/core/SkBitmap.h" | |
17 #include "ui/gfx/geometry/size.h" | |
18 | |
19 #if defined(OS_CHROMEOS) | |
20 #include "ui/gfx/chromeos/codec/jpeg_codec_robust_slow.h" | |
21 #include "ui/gfx/codec/png_codec.h" | |
22 #endif | |
23 | |
24 namespace { | |
25 int64_t kMaxMessageSize = IPC::Channel::kMaximumMessageSize; | |
26 int64_t kPadding = 64; | |
27 } | |
28 | |
29 ImageDecoderImpl::ImageDecoderImpl(int64_t max_message_size) | |
30 : max_message_size_(max_message_size), binding_(this) { | |
31 } | |
32 | |
33 ImageDecoderImpl::ImageDecoderImpl( | |
34 mojo::InterfaceRequest<mojom::ImageDecoder> request) | |
35 : max_message_size_(kMaxMessageSize), binding_(this, std::move(request)) { | |
36 } | |
37 | |
38 ImageDecoderImpl::~ImageDecoderImpl() { | |
39 } | |
40 | |
41 void ImageDecoderImpl::DecodeImage( | |
42 mojo::Array<uint8_t> encoded_data, | |
43 mojom::ImageCodec codec, | |
44 bool shrink_to_fit, | |
45 const mojo::Callback<void(skia::mojom::BitmapPtr)>& callback) { | |
46 if (encoded_data.size() == 0) { | |
47 callback.Run(nullptr); | |
48 return; | |
49 } | |
50 | |
51 SkBitmap decoded_image; | |
Jorge Lucangeli Obes
2016/04/05 04:33:51
Will this be NULL when a renderer on non-Chrome OS
Anand Mistry (off Chromium)
2016/04/05 05:15:27
Firstly, renderers don't send these messages, the
| |
52 #if defined(OS_CHROMEOS) | |
53 if (codec == mojom::ImageCodec::ROBUST_JPEG) { | |
54 // Our robust jpeg decoding is using IJG libjpeg. | |
55 if (encoded_data.size()) { | |
56 scoped_ptr<SkBitmap> decoded_jpeg( | |
57 gfx::JPEGCodecRobustSlow::Decode(encoded_data.storage().data(), | |
58 encoded_data.size())); | |
59 if (decoded_jpeg.get() && !decoded_jpeg->empty()) | |
60 decoded_image = *decoded_jpeg; | |
61 } | |
62 } else if (codec == mojom::ImageCodec::ROBUST_PNG) { | |
63 // Our robust PNG decoding is using libpng. | |
64 if (encoded_data.size()) { | |
65 SkBitmap decoded_png; | |
66 if (gfx::PNGCodec::Decode(encoded_data.storage().data(), | |
67 encoded_data.size(), &decoded_png)) { | |
68 decoded_image = decoded_png; | |
69 } | |
70 } | |
71 } | |
72 #endif // defined(OS_CHROMEOS) | |
73 if (codec == mojom::ImageCodec::DEFAULT) { | |
74 decoded_image = content::DecodeImage(encoded_data.storage().data(), | |
75 gfx::Size(), encoded_data.size()); | |
76 } | |
77 | |
78 if (!decoded_image.isNull()) { | |
79 skia::mojom::BitmapPtr dummy_image = skia::mojom::Bitmap::New(); | |
80 int64_t struct_size = | |
81 skia::mojom::GetSerializedSize_(dummy_image, nullptr) + kPadding; | |
82 int64_t image_size = decoded_image.computeSize64(); | |
83 int halves = 0; | |
84 while (struct_size + (image_size >> 2 * halves) > max_message_size_) | |
85 halves++; | |
86 if (halves) { | |
87 if (shrink_to_fit) { | |
88 // If decoded image is too large for IPC message, shrink it by halves. | |
89 // This prevents quality loss, and should never overshrink on displays | |
90 // smaller than 3600x2400. | |
91 // TODO (Issue 416916): Instead of shrinking, return via shared memory | |
92 decoded_image = skia::ImageOperations::Resize( | |
93 decoded_image, skia::ImageOperations::RESIZE_LANCZOS3, | |
94 decoded_image.width() >> halves, decoded_image.height() >> halves); | |
95 } else { | |
96 decoded_image.reset(); | |
97 } | |
98 } | |
99 } | |
100 | |
101 if (decoded_image.isNull()) | |
102 callback.Run(nullptr); | |
103 else | |
104 callback.Run(skia::mojom::Bitmap::From(decoded_image)); | |
105 } | |
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