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1 // Copyright 2015 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 "cc/resources/texture_compressor.h" | |
6 | |
7 #include "cc/base/util.h" | |
8 #include "testing/gtest/include/gtest/gtest.h" | |
9 | |
10 namespace cc { | |
11 namespace { | |
12 | |
13 const int kImageWidth = 256; | |
14 const int kImageHeight = 256; | |
15 const int kImageChannels = 4; | |
16 const int kImageSizeInBytes = kImageWidth * kImageHeight * kImageChannels; | |
17 | |
18 TEST(TextureCompressorETC1Test, Compress256x256Ratio) { | |
19 scoped_ptr<TextureCompressor> compressor = | |
20 TextureCompressor::Create(TextureCompressor::kFormatETC1); | |
21 uint8_t src[kImageSizeInBytes]; | |
22 uint8_t dst[kImageSizeInBytes]; | |
23 const unsigned int kImagePoison = 0xDEADBEEF; | |
24 | |
25 // Poison destination bytes so we can see how much has been | |
26 // overwritten by compression algorithm. | |
27 uint32_t* dst_32 = reinterpret_cast<uint32_t*>(dst); | |
28 for (int i = 0; i < kImageWidth * kImageHeight; i++) { | |
29 dst_32[i] = kImagePoison; | |
30 } | |
31 | |
32 // Generate test texture. | |
33 for (int i = 0; i < kImageSizeInBytes; i++) { | |
34 src[i] = i % 256; | |
35 } | |
36 | |
37 compressor->Compress(src, dst, kImageWidth, kImageHeight, | |
38 TextureCompressor::kQualityLow); | |
39 | |
40 int compressed_size = 0; | |
41 for (compressed_size = 0; compressed_size < kImageWidth * kImageHeight; | |
42 compressed_size++) { | |
43 if (dst_32[compressed_size] == kImagePoison) { | |
44 // Represents size in bytes of the compressed block. | |
45 compressed_size = compressed_size * 4; | |
46 break; | |
47 } | |
48 } | |
49 | |
50 // Check if compression ratio is 8:1 for RGBA or BGRA images, after discarding | |
51 // alpha channel. | |
52 EXPECT_EQ(kImageSizeInBytes, compressed_size * 8); | |
53 } | |
54 | |
55 } // namespace | |
56 } // namespace cc | |
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