halcanary@google.com | 29d4e63 | 2013-10-11 18:21:56 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | // This tests out GIF decoder (SkImageDecoder_libgif.cpp) |
| 9 | // It is not used on these platforms: |
| 10 | #if (!defined(SK_BUILD_FOR_WIN32)) && \ |
| 11 | (!defined(SK_BUILD_FOR_IOS)) && \ |
| 12 | (!defined(SK_BUILD_FOR_MAC)) |
| 13 | |
| 14 | #include "SkBitmap.h" |
| 15 | #include "SkData.h" |
| 16 | #include "SkForceLinking.h" |
| 17 | #include "SkImageDecoder.h" |
| 18 | #include "SkImage.h" |
| 19 | #include "SkStream.h" |
| 20 | #include "Test.h" |
| 21 | |
| 22 | __SK_FORCE_IMAGE_DECODER_LINKING; |
| 23 | |
| 24 | namespace { |
| 25 | unsigned char gifData[] = { |
| 26 | 0x47, 0x49, 0x46, 0x38, 0x37, 0x61, 0x03, 0x00, |
| 27 | 0x03, 0x00, 0xe3, 0x08, 0x00, 0x00, 0x00, 0x00, |
| 28 | 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff, 0x00, |
| 29 | 0xff, 0x80, 0x80, 0x80, 0x00, 0xff, 0x00, 0x00, |
| 30 | 0xff, 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, |
| 31 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 32 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 33 | 0xff, 0xff, 0xff, 0xff, 0xff, 0x2c, 0x00, 0x00, |
| 34 | 0x00, 0x00, 0x03, 0x00, 0x03, 0x00, 0x00, 0x04, |
| 35 | 0x07, 0x50, 0x1c, 0x43, 0x40, 0x41, 0x23, 0x44, |
| 36 | 0x00, 0x3b}; |
| 37 | unsigned char gifDataNoColormap[] = { |
| 38 | 0x47, 0x49, 0x46, 0x38, 0x39, 0x61, 0x01, 0x00, |
| 39 | 0x01, 0x00, 0x00, 0x00, 0x00, 0x21, 0xf9, 0x04, |
| 40 | 0x01, 0x0a, 0x00, 0x01, 0x00, 0x2c, 0x00, 0x00, |
| 41 | 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x02, |
| 42 | 0x02, 0x4c, 0x01, 0x00, 0x3b}; |
| 43 | unsigned char interlacedGif[] = { |
| 44 | 0x47, 0x49, 0x46, 0x38, 0x37, 0x61, 0x09, 0x00, |
| 45 | 0x09, 0x00, 0xe3, 0x08, 0x00, 0x00, 0x00, 0x00, |
| 46 | 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff, 0x00, |
| 47 | 0xff, 0x80, 0x80, 0x80, 0x00, 0xff, 0x00, 0x00, |
| 48 | 0xff, 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, |
| 49 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 50 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
| 51 | 0xff, 0xff, 0xff, 0xff, 0xff, 0x2c, 0x00, 0x00, |
| 52 | 0x00, 0x00, 0x09, 0x00, 0x09, 0x00, 0x40, 0x04, |
| 53 | 0x1b, 0x50, 0x1c, 0x23, 0xe9, 0x44, 0x23, 0x60, |
| 54 | 0x9d, 0x09, 0x28, 0x1e, 0xf8, 0x6d, 0x64, 0x56, |
| 55 | 0x9d, 0x53, 0xa8, 0x7e, 0xa8, 0x65, 0x94, 0x5c, |
| 56 | 0xb0, 0x8a, 0x45, 0x04, 0x00, 0x3b}; |
| 57 | }; // namespace |
| 58 | |
| 59 | static void test_gif_data_no_colormap(skiatest::Reporter* r, |
| 60 | void* data, size_t size) { |
| 61 | SkBitmap bm; |
| 62 | bool imageDecodeSuccess = SkImageDecoder::DecodeMemory( |
| 63 | data, size, &bm); |
| 64 | REPORTER_ASSERT(r, imageDecodeSuccess); |
| 65 | REPORTER_ASSERT(r, bm.width() == 1); |
| 66 | REPORTER_ASSERT(r, bm.height() == 1); |
| 67 | REPORTER_ASSERT(r, !(bm.empty())); |
| 68 | if (!(bm.empty())) { |
| 69 | REPORTER_ASSERT(r, bm.getColor(0, 0) == 0x00000000); |
| 70 | } |
| 71 | } |
| 72 | static void test_gif_data(skiatest::Reporter* r, void* data, size_t size) { |
| 73 | SkBitmap bm; |
| 74 | bool imageDecodeSuccess = SkImageDecoder::DecodeMemory( |
| 75 | data, size, &bm); |
| 76 | REPORTER_ASSERT(r, imageDecodeSuccess); |
| 77 | REPORTER_ASSERT(r, bm.width() == 3); |
| 78 | REPORTER_ASSERT(r, bm.height() == 3); |
| 79 | REPORTER_ASSERT(r, !(bm.empty())); |
| 80 | if (!(bm.empty())) { |
| 81 | REPORTER_ASSERT(r, bm.getColor(0, 0) == 0xffff0000); |
| 82 | REPORTER_ASSERT(r, bm.getColor(1, 0) == 0xffffff00); |
| 83 | REPORTER_ASSERT(r, bm.getColor(2, 0) == 0xff00ffff); |
| 84 | REPORTER_ASSERT(r, bm.getColor(0, 1) == 0xff808080); |
| 85 | REPORTER_ASSERT(r, bm.getColor(1, 1) == 0xff000000); |
| 86 | REPORTER_ASSERT(r, bm.getColor(2, 1) == 0xff00ff00); |
| 87 | REPORTER_ASSERT(r, bm.getColor(0, 2) == 0xffffffff); |
| 88 | REPORTER_ASSERT(r, bm.getColor(1, 2) == 0xffff00ff); |
| 89 | REPORTER_ASSERT(r, bm.getColor(2, 2) == 0xff0000ff); |
| 90 | } |
| 91 | } |
| 92 | static void test_interlaced_gif_data(skiatest::Reporter* r, |
| 93 | void* data, |
| 94 | size_t size) { |
| 95 | SkBitmap bm; |
| 96 | bool imageDecodeSuccess = SkImageDecoder::DecodeMemory( |
| 97 | data, size, &bm); |
| 98 | REPORTER_ASSERT(r, imageDecodeSuccess); |
| 99 | REPORTER_ASSERT(r, bm.width() == 9); |
| 100 | REPORTER_ASSERT(r, bm.height() == 9); |
| 101 | REPORTER_ASSERT(r, !(bm.empty())); |
| 102 | if (!(bm.empty())) { |
| 103 | REPORTER_ASSERT(r, bm.getColor(0, 0) == 0xffff0000); |
| 104 | REPORTER_ASSERT(r, bm.getColor(1, 0) == 0xffffff00); |
| 105 | REPORTER_ASSERT(r, bm.getColor(2, 0) == 0xff00ffff); |
| 106 | |
| 107 | REPORTER_ASSERT(r, bm.getColor(0, 2) == 0xffffffff); |
| 108 | REPORTER_ASSERT(r, bm.getColor(1, 2) == 0xffff00ff); |
| 109 | REPORTER_ASSERT(r, bm.getColor(2, 2) == 0xff0000ff); |
| 110 | |
| 111 | REPORTER_ASSERT(r, bm.getColor(0, 4) == 0xff808080); |
| 112 | REPORTER_ASSERT(r, bm.getColor(1, 4) == 0xff000000); |
| 113 | REPORTER_ASSERT(r, bm.getColor(2, 4) == 0xff00ff00); |
| 114 | |
| 115 | REPORTER_ASSERT(r, bm.getColor(0, 6) == 0xffff0000); |
| 116 | REPORTER_ASSERT(r, bm.getColor(1, 6) == 0xffffff00); |
| 117 | REPORTER_ASSERT(r, bm.getColor(2, 6) == 0xff00ffff); |
| 118 | |
| 119 | REPORTER_ASSERT(r, bm.getColor(0, 8) == 0xffffffff); |
| 120 | REPORTER_ASSERT(r, bm.getColor(1, 8) == 0xffff00ff); |
| 121 | REPORTER_ASSERT(r, bm.getColor(2, 8) == 0xff0000ff); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | static void test_gif_data_short(skiatest::Reporter* r, |
| 126 | void* data, |
| 127 | size_t size) { |
| 128 | SkBitmap bm; |
| 129 | bool imageDecodeSuccess = SkImageDecoder::DecodeMemory( |
| 130 | data, size, &bm); |
| 131 | REPORTER_ASSERT(r, imageDecodeSuccess); |
| 132 | REPORTER_ASSERT(r, bm.width() == 3); |
| 133 | REPORTER_ASSERT(r, bm.height() == 3); |
| 134 | REPORTER_ASSERT(r, !(bm.empty())); |
| 135 | if (!(bm.empty())) { |
| 136 | REPORTER_ASSERT(r, bm.getColor(0, 0) == 0xffff0000); |
| 137 | REPORTER_ASSERT(r, bm.getColor(1, 0) == 0xffffff00); |
| 138 | REPORTER_ASSERT(r, bm.getColor(2, 0) == 0xff00ffff); |
| 139 | REPORTER_ASSERT(r, bm.getColor(0, 1) == 0xff808080); |
| 140 | REPORTER_ASSERT(r, bm.getColor(1, 1) == 0xff000000); |
| 141 | REPORTER_ASSERT(r, bm.getColor(2, 1) == 0xff00ff00); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | /** |
| 146 | This test will test the ability of the SkImageDecoder to deal with |
| 147 | GIF files which have been mangled somehow. We want to display as |
| 148 | much of the GIF as possible. |
| 149 | */ |
| 150 | static void TestGif(skiatest::Reporter* reporter) { |
| 151 | // test perfectly good images. |
| 152 | test_gif_data(reporter, static_cast<void *>(gifData), sizeof(gifData)); |
| 153 | test_interlaced_gif_data(reporter, static_cast<void *>(interlacedGif), |
| 154 | sizeof(interlacedGif)); |
| 155 | |
| 156 | unsigned char badData[sizeof(gifData)]; |
| 157 | |
| 158 | /* If you set the environment variable |
| 159 | skia_images_gif_suppressDecoderWarnings to 'false', you will |
| 160 | see warnings on stderr. This is a feature. */ |
| 161 | |
| 162 | memcpy(badData, gifData, sizeof(gifData)); |
| 163 | badData[6] = 0x01; // image too wide |
| 164 | test_gif_data(reporter, static_cast<void *>(badData), sizeof(gifData)); |
| 165 | // "libgif warning [image too wide, expanding output to size]" |
| 166 | |
| 167 | memcpy(badData, gifData, sizeof(gifData)); |
| 168 | badData[8] = 0x01; // image too tall |
| 169 | test_gif_data(reporter, static_cast<void *>(badData), sizeof(gifData)); |
| 170 | // "libgif warning [image too tall, expanding output to size]" |
| 171 | |
| 172 | memcpy(badData, gifData, sizeof(gifData)); |
| 173 | badData[62] = 0x01; // image shifted right |
| 174 | test_gif_data(reporter, static_cast<void *>(badData), sizeof(gifData)); |
| 175 | // "libgif warning [shifting image left to fit]" |
| 176 | |
| 177 | memcpy(badData, gifData, sizeof(gifData)); |
| 178 | badData[64] = 0x01; // image shifted down |
| 179 | test_gif_data(reporter, static_cast<void *>(badData), sizeof(gifData)); |
| 180 | // "libgif warning [shifting image up to fit]" |
| 181 | |
| 182 | memcpy(badData, gifData, sizeof(gifData)); |
| 183 | badData[62] = 0xff; // image shifted left |
| 184 | badData[63] = 0xff; // 2's complement -1 short |
| 185 | test_gif_data(reporter, static_cast<void *>(badData), sizeof(gifData)); |
| 186 | // "libgif warning [shifting image left to fit]" |
| 187 | |
| 188 | memcpy(badData, gifData, sizeof(gifData)); |
| 189 | badData[64] = 0xff; // image shifted up |
| 190 | badData[65] = 0xff; // 2's complement -1 short |
| 191 | test_gif_data(reporter, static_cast<void *>(badData), sizeof(gifData)); |
| 192 | // "libgif warning [shifting image up to fit]" |
| 193 | |
| 194 | test_gif_data_no_colormap(reporter, static_cast<void *>(gifDataNoColormap), |
| 195 | sizeof(gifDataNoColormap)); |
| 196 | // "libgif warning [missing colormap]" |
| 197 | |
| 198 | // test short Gif. 80 is missing a few bytes. |
| 199 | test_gif_data_short(reporter, static_cast<void *>(gifData), 80); |
| 200 | // "libgif warning [DGifGetLine]" |
| 201 | |
| 202 | test_interlaced_gif_data(reporter, static_cast<void *>(interlacedGif), |
| 203 | 100); // 100 is missing a few bytes |
| 204 | // "libgif warning [interlace DGifGetLine]" |
| 205 | } |
| 206 | |
| 207 | #include "TestClassDef.h" |
| 208 | DEFINE_TESTCLASS("GifTest", GifTestClass, TestGif) |
| 209 | |
| 210 | #endif // !(SK_BUILD_FOR_WIN32||SK_BUILD_FOR_IOS||SK_BUILD_FOR_MAC) |