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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 <vector> | |
8 | |
9 #include "base/bind.h" | |
10 #include "ipc/ipc_channel.h" | |
11 #include "testing/gtest/include/gtest/gtest.h" | |
12 #include "third_party/skia/include/core/SkBitmap.h" | |
13 #include "ui/gfx/codec/jpeg_codec.h" | |
14 | |
15 namespace mojom { | |
16 | |
17 namespace { | |
18 | |
19 bool CreateJPEGImage(int width, | |
20 int height, | |
21 SkColor color, | |
22 std::vector<unsigned char>* output) { | |
23 SkBitmap bitmap; | |
24 bitmap.allocN32Pixels(width, height); | |
25 bitmap.eraseColor(color); | |
26 | |
27 const int kQuality = 50; | |
28 if (!gfx::JPEGCodec::Encode( | |
29 static_cast<const unsigned char*>(bitmap.getPixels()), | |
30 gfx::JPEGCodec::FORMAT_SkBitmap, width, height, | |
31 static_cast<int>(bitmap.rowBytes()), kQuality, output)) { | |
32 LOG(ERROR) << "Unable to encode " << width << "x" << height << " bitmap"; | |
33 return false; | |
34 } | |
35 return true; | |
36 } | |
37 | |
38 class Request { | |
39 public: | |
40 explicit Request(ImageDecoderImpl* decoder) : decoder_(decoder) {} | |
41 | |
42 void DecodeImage(const std::vector<unsigned char>& image, bool shrink) { | |
43 decoder_->DecodeImage( | |
44 image, ImageCodec::DEFAULT, shrink, | |
45 base::Bind(&Request::OnRequestDone, base::Unretained(this))); | |
46 } | |
47 | |
48 const SkBitmap& bitmap() const { return bitmap_; } | |
49 | |
50 private: | |
51 void OnRequestDone(const SkBitmap& result_image) { bitmap_ = result_image; } | |
52 | |
53 ImageDecoderImpl* decoder_; | |
54 SkBitmap bitmap_; | |
55 }; | |
56 | |
57 } // namespace | |
58 | |
59 // Test that DecodeImage() doesn't return image message > (max message size) | |
60 TEST(ImageDecoderImplTest, DecodeImageSizeLimit) { | |
61 // Using actual limit generates 14000 x 9400 images, which causes the test to | |
62 // timeout. We test with a smaller limit for efficiency. | |
63 const size_t kTestMessageSize = IPC::Channel::kMaximumMessageSize / 1024; | |
64 | |
65 ImageDecoderImpl decoder(kTestMessageSize); | |
66 | |
67 // Approx max height for 3:2 image that will fit in IPC message; | |
68 // 1.5 for width/height ratio, 4 for bytes/pixel | |
69 int max_height_for_msg = sqrt(kTestMessageSize / (1.5 * 4)); | |
70 int base_msg_size = sizeof(skia::mojom::Bitmap::Data_); | |
71 | |
72 // Sizes which should trigger dimension-halving 0, 1 and 2 times | |
73 int heights[] = {max_height_for_msg - 10, | |
74 max_height_for_msg + 10, | |
75 2 * max_height_for_msg + 10}; | |
76 int widths[] = {heights[0] * 3 / 2, heights[1] * 3 / 2, heights[2] * 3 / 2}; | |
77 for (size_t i = 0; i < arraysize(heights); i++) { | |
78 std::vector<unsigned char> jpg; | |
79 ASSERT_TRUE(CreateJPEGImage(widths[i], heights[i], SK_ColorRED, &jpg)); | |
80 | |
81 Request request(&decoder); | |
82 request.DecodeImage(jpg, true); | |
83 ASSERT_FALSE(request.bitmap().isNull()); | |
84 | |
85 // Check that image has been shrunk appropriately | |
86 EXPECT_LT(request.bitmap().computeSize64() + base_msg_size, | |
87 static_cast<int64_t>(kTestMessageSize)); | |
88 // Android does its own image shrinking for memory conservation deeper in | |
89 // the decode, so more specific tests here won't work. | |
90 #if !defined(OS_ANDROID) | |
91 EXPECT_EQ(widths[i] >> i, request.bitmap().width()); | |
92 EXPECT_EQ(heights[i] >> i, request.bitmap().height()); | |
93 | |
94 // Check that if resize not requested and image exceeds IPC size limit, | |
95 // an empty image is returned | |
96 if (heights[i] > max_height_for_msg) { | |
97 Request request(&decoder); | |
98 request.DecodeImage(jpg, false); | |
99 EXPECT_TRUE(request.bitmap().isNull()); | |
100 } | |
101 #endif | |
102 } | |
103 } | |
104 | |
105 TEST(ImageDecoderImplTest, DecodeImageFailed) { | |
106 ImageDecoderImpl decoder(IPC::Channel::kMaximumMessageSize); | |
107 | |
108 // The "jpeg" is just some "random" data; | |
109 const char kRandomData[] = "u gycfy7xdjkhfgui bdui "; | |
110 std::vector<unsigned char> jpg(kRandomData, | |
111 kRandomData + sizeof(kRandomData)); | |
112 | |
113 Request request(&decoder); | |
114 request.DecodeImage(jpg, false); | |
115 EXPECT_TRUE(request.bitmap().isNull()); | |
116 } | |
117 | |
118 } // namespace mojom | |
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