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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 #define TEST_IMAGE_WIDTH 256 |
| 14 #define TEST_IMAGE_HEIGHT 256 |
| 15 #define TEST_IMAGE_CHANNELS 4 |
| 16 #define TEST_IMAGE_SIZE \ |
| 17 (TEST_IMAGE_WIDTH * TEST_IMAGE_HEIGHT * TEST_IMAGE_CHANNELS) |
| 18 |
| 19 #define TEST_IMAGE_POISON 0xDEADBEEF |
| 20 #define TEST_PIXEL_LIMIT 256 |
| 21 |
| 22 TEST(TextureCompressorTest, CreateETC1) { |
| 23 scoped_ptr<TextureCompressor> compressor = |
| 24 TextureCompressor::Create(TextureCompressor::kFormatETC1); |
| 25 EXPECT_NE(nullptr, compressor); |
| 26 } |
| 27 |
| 28 TEST(TextureCompressorTest, CompressRatioETC1) { |
| 29 scoped_ptr<TextureCompressor> compressor = |
| 30 TextureCompressor::Create(TextureCompressor::kFormatETC1); |
| 31 uint8_t src[TEST_IMAGE_SIZE]; |
| 32 uint8_t dst[TEST_IMAGE_SIZE]; |
| 33 int compressed_size = 0; |
| 34 |
| 35 /* Poison destination bytes */ |
| 36 uint32_t* dst_32 = reinterpret_cast<uint32_t*>(dst); |
| 37 for (int i = 0; i < TEST_IMAGE_WIDTH * TEST_IMAGE_HEIGHT; i++) { |
| 38 dst_32[i] = TEST_IMAGE_POISON; |
| 39 } |
| 40 |
| 41 /* Generate test texture */ |
| 42 for (int i = 0; i < TEST_IMAGE_SIZE; i++) { |
| 43 src[i] = i % TEST_PIXEL_LIMIT; |
| 44 } |
| 45 |
| 46 compressor->Compress(src, dst, TEST_IMAGE_WIDTH, TEST_IMAGE_HEIGHT, |
| 47 (TextureCompressor::Quality)0); |
| 48 for (compressed_size = 0; |
| 49 compressed_size < TEST_IMAGE_WIDTH * TEST_IMAGE_HEIGHT; |
| 50 compressed_size++) { |
| 51 if (dst_32[compressed_size] == TEST_IMAGE_POISON) { |
| 52 compressed_size = |
| 53 compressed_size * 4; /* size in bytes of the compressed block */ |
| 54 break; |
| 55 } |
| 56 } |
| 57 |
| 58 /* Check if compression ratio is 8:1 for RGBA or BGRA images, after discarding |
| 59 * alpha channel */ |
| 60 EXPECT_EQ(compressed_size * 8, TEST_IMAGE_SIZE); |
| 61 } |
| 62 |
| 63 } // namespace |
| 64 } // namespace cc |
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