OLD | NEW |
1 // Copyright 2016 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "platform/image-decoders/png/PNGImageDecoder.h" | 5 #include "platform/image-decoders/png/PNGImageDecoder.h" |
6 | 6 |
7 #include "platform/image-decoders/ImageDecoderTestHelpers.h" | 7 #include "platform/image-decoders/ImageDecoderTestHelpers.h" |
| 8 #include "png.h" |
8 #include "testing/gtest/include/gtest/gtest.h" | 9 #include "testing/gtest/include/gtest/gtest.h" |
9 #include <memory> | 10 #include <memory> |
10 | 11 |
| 12 // /LayoutTests/images/resources/png-animated-idat-part-of-animation.png |
| 13 // is modified in multiple tests to simulate erroneous PNGs. As a reference, |
| 14 // the table below shows how the file is structured. |
| 15 // |
| 16 // Offset | 8 33 95 133 172 210 241 279 314 352 422 |
| 17 // ------------------------------------------------------------------------- |
| 18 // Chunk | IHDR acTL fcTL IDAT fcTL fdAT fcTL fdAT fcTL fdAT IEND |
| 19 // |
| 20 // In between the acTL and fcTL there are two other chunks, PLTE and tRNS, but |
| 21 // those are not specifically used in this test suite. The same holds for a |
| 22 // tEXT chunk in between the last fdAT and IEND. |
| 23 // |
| 24 // In the current behavior of PNG image decoders, the 4 frames are detected when |
| 25 // respectively 141, 249, 322 and 430 bytes are received. The first frame should |
| 26 // be detected when the IDAT has been received, and non-first frames when the |
| 27 // next fcTL or IEND chunk has been received. Note that all offsets are +8, |
| 28 // because a chunk is identified by byte 4-7. |
| 29 |
11 namespace blink { | 30 namespace blink { |
12 | 31 |
13 namespace { | 32 namespace { |
14 | 33 |
15 std::unique_ptr<ImageDecoder> createDecoder( | 34 std::unique_ptr<ImageDecoder> createDecoder( |
16 ImageDecoder::AlphaOption alphaOption) { | 35 ImageDecoder::AlphaOption alphaOption) { |
17 return WTF::wrapUnique(new PNGImageDecoder( | 36 return WTF::wrapUnique(new PNGImageDecoder( |
18 alphaOption, ColorBehavior::transformToTargetForTesting(), | 37 alphaOption, ColorBehavior::transformToTargetForTesting(), |
19 ImageDecoder::noDecodedImageByteLimit)); | 38 ImageDecoder::noDecodedImageByteLimit)); |
20 } | 39 } |
21 | 40 |
22 std::unique_ptr<ImageDecoder> createDecoder() { | 41 std::unique_ptr<ImageDecoder> createDecoder() { |
23 return createDecoder(ImageDecoder::AlphaNotPremultiplied); | 42 return createDecoder(ImageDecoder::AlphaNotPremultiplied); |
24 } | 43 } |
25 | 44 |
26 std::unique_ptr<ImageDecoder> createDecoderWithPngData(const char* pngFile) { | 45 std::unique_ptr<ImageDecoder> createDecoderWithPngData(const char* pngFile) { |
27 auto decoder = createDecoder(); | 46 auto decoder = createDecoder(); |
28 auto data = readFile(pngFile); | 47 auto data = readFile(pngFile); |
29 EXPECT_FALSE(data->isEmpty()); | 48 EXPECT_FALSE(data->isEmpty()); |
30 decoder->setData(data.get(), true); | 49 decoder->setData(data.get(), true); |
31 return decoder; | 50 return decoder; |
32 } | 51 } |
33 | 52 |
34 void testSize(const char* pngFile, IntSize expectedSize) { | 53 void testSize(const char* pngFile, IntSize expectedSize) { |
35 auto decoder = createDecoderWithPngData(pngFile); | 54 auto decoder = createDecoderWithPngData(pngFile); |
36 EXPECT_TRUE(decoder->isSizeAvailable()); | 55 EXPECT_TRUE(decoder->isSizeAvailable()); |
37 EXPECT_EQ(expectedSize, decoder->size()); | 56 EXPECT_EQ(expectedSize, decoder->size()); |
38 } | 57 } |
39 | 58 |
| 59 // Test whether querying for the size of the image works if we present the |
| 60 // data byte by byte. |
| 61 void testSizeByteByByte(const char* pngFile, |
| 62 size_t bytesNeededToDecodeSize, |
| 63 IntSize expectedSize) { |
| 64 auto decoder = createDecoder(); |
| 65 auto data = readFile(pngFile); |
| 66 ASSERT_FALSE(data->isEmpty()); |
| 67 ASSERT_LT(bytesNeededToDecodeSize, data->size()); |
| 68 |
| 69 const char* source = data->data(); |
| 70 RefPtr<SharedBuffer> partialData = SharedBuffer::create(); |
| 71 for (size_t length = 1; length <= bytesNeededToDecodeSize; length++) { |
| 72 partialData->append(source++, 1u); |
| 73 decoder->setData(partialData.get(), false); |
| 74 |
| 75 if (length < bytesNeededToDecodeSize) { |
| 76 EXPECT_FALSE(decoder->isSizeAvailable()); |
| 77 EXPECT_TRUE(decoder->size().isEmpty()); |
| 78 EXPECT_FALSE(decoder->failed()); |
| 79 } else { |
| 80 EXPECT_TRUE(decoder->isSizeAvailable()); |
| 81 EXPECT_EQ(expectedSize, decoder->size()); |
| 82 } |
| 83 } |
| 84 EXPECT_FALSE(decoder->failed()); |
| 85 } |
| 86 |
| 87 void writeUint32(uint32_t val, png_byte* data) { |
| 88 data[0] = val >> 24; |
| 89 data[1] = val >> 16; |
| 90 data[2] = val >> 8; |
| 91 data[3] = val; |
| 92 } |
| 93 |
40 void testRepetitionCount(const char* pngFile, int expectedRepetitionCount) { | 94 void testRepetitionCount(const char* pngFile, int expectedRepetitionCount) { |
41 auto decoder = createDecoderWithPngData(pngFile); | 95 auto decoder = createDecoderWithPngData(pngFile); |
42 // Decoding the frame count sets the repetition count as well. | 96 // Decoding the frame count sets the number of repetitions as well. |
43 decoder->frameCount(); | 97 decoder->frameCount(); |
44 EXPECT_FALSE(decoder->failed()); | 98 EXPECT_FALSE(decoder->failed()); |
45 EXPECT_EQ(expectedRepetitionCount, decoder->repetitionCount()); | 99 EXPECT_EQ(expectedRepetitionCount, decoder->repetitionCount()); |
46 } | 100 } |
47 | 101 |
| 102 struct PublicFrameInfo { |
| 103 size_t duration; |
| 104 IntRect frameRect; |
| 105 ImageFrame::AlphaBlendSource alphaBlend; |
| 106 ImageFrame::DisposalMethod disposalMethod; |
| 107 }; |
| 108 |
| 109 // This is the frame data for the following PNG image: |
| 110 // /LayoutTests/images/resources/png-animated-idat-part-of-animation.png |
| 111 static PublicFrameInfo pngAnimatedFrameInfo[] = { |
| 112 {500, |
| 113 {IntPoint(0, 0), IntSize(5, 5)}, |
| 114 ImageFrame::BlendAtopBgcolor, |
| 115 ImageFrame::DisposeKeep}, |
| 116 {900, |
| 117 {IntPoint(1, 1), IntSize(3, 1)}, |
| 118 ImageFrame::BlendAtopBgcolor, |
| 119 ImageFrame::DisposeOverwriteBgcolor}, |
| 120 {2000, |
| 121 {IntPoint(1, 2), IntSize(3, 2)}, |
| 122 ImageFrame::BlendAtopPreviousFrame, |
| 123 ImageFrame::DisposeKeep}, |
| 124 {1500, |
| 125 {IntPoint(1, 2), IntSize(3, 1)}, |
| 126 ImageFrame::BlendAtopBgcolor, |
| 127 ImageFrame::DisposeKeep}, |
| 128 }; |
| 129 |
| 130 void compareFrameWithExpectation(const PublicFrameInfo& expected, |
| 131 const ImageFrame* frame) { |
| 132 EXPECT_EQ(expected.duration, frame->duration()); |
| 133 EXPECT_EQ(expected.frameRect, frame->originalFrameRect()); |
| 134 EXPECT_EQ(expected.disposalMethod, frame->getDisposalMethod()); |
| 135 EXPECT_EQ(expected.alphaBlend, frame->getAlphaBlendSource()); |
| 136 } |
| 137 |
| 138 // This function removes |length| bytes at |offset|, and then calls frameCount. |
| 139 // It assumes the missing bytes should result in a failed decode because the |
| 140 // parser jumps |length| bytes too far in the next chunk. |
| 141 void testMissingDataBreaksDecoding(const char* pngFile, |
| 142 size_t offset, |
| 143 size_t length) { |
| 144 auto decoder = createDecoder(); |
| 145 auto data = readFile(pngFile); |
| 146 ASSERT_FALSE(data->isEmpty()); |
| 147 |
| 148 RefPtr<SharedBuffer> invalidData = SharedBuffer::create(data->data(), offset); |
| 149 invalidData->append(data->data() + offset + length, |
| 150 data->size() - offset - length); |
| 151 ASSERT_EQ(data->size() - length, invalidData->size()); |
| 152 |
| 153 decoder->setData(invalidData, true); |
| 154 decoder->frameCount(); |
| 155 EXPECT_TRUE(decoder->failed()); |
| 156 } |
| 157 |
| 158 // Verify that a decoder with a parse error converts to a static image. |
| 159 static void expectStatic(ImageDecoder* decoder) { |
| 160 EXPECT_EQ(1u, decoder->frameCount()); |
| 161 EXPECT_FALSE(decoder->failed()); |
| 162 |
| 163 ImageFrame* frame = decoder->frameBufferAtIndex(0); |
| 164 ASSERT_NE(nullptr, frame); |
| 165 EXPECT_EQ(ImageFrame::FrameComplete, frame->getStatus()); |
| 166 EXPECT_FALSE(decoder->failed()); |
| 167 EXPECT_EQ(cAnimationNone, decoder->repetitionCount()); |
| 168 } |
| 169 |
| 170 // Decode up to the indicated fcTL offset and then provide an fcTL with the |
| 171 // wrong chunk size (20 instead of 26). |
| 172 void testInvalidFctlSize(const char* pngFile, |
| 173 size_t offsetFctl, |
| 174 size_t expectedFrameCount, |
| 175 bool shouldFail) { |
| 176 auto data = readFile(pngFile); |
| 177 ASSERT_FALSE(data->isEmpty()); |
| 178 |
| 179 auto decoder = createDecoder(); |
| 180 RefPtr<SharedBuffer> invalidData = |
| 181 SharedBuffer::create(data->data(), offsetFctl); |
| 182 |
| 183 // Test if this gives the correct frame count, before the fcTL is parsed. |
| 184 decoder->setData(invalidData, false); |
| 185 EXPECT_EQ(expectedFrameCount, decoder->frameCount()); |
| 186 ASSERT_FALSE(decoder->failed()); |
| 187 |
| 188 // Append the wrong size to the data stream |
| 189 png_byte sizeChunk[4]; |
| 190 writeUint32(20, sizeChunk); |
| 191 invalidData->append(reinterpret_cast<char*>(sizeChunk), 4u); |
| 192 |
| 193 // Skip the size in the original data, but provide a truncated fcTL, |
| 194 // which is 4B of tag, 20B of data and 4B of CRC, totalling 28B. |
| 195 invalidData->append(data->data() + offsetFctl + 4, 28u); |
| 196 // Append the rest of the data |
| 197 const size_t offsetPostFctl = offsetFctl + 38; |
| 198 invalidData->append(data->data() + offsetPostFctl, |
| 199 data->size() - offsetPostFctl); |
| 200 |
| 201 decoder->setData(invalidData, false); |
| 202 if (shouldFail) { |
| 203 EXPECT_EQ(expectedFrameCount, decoder->frameCount()); |
| 204 EXPECT_EQ(true, decoder->failed()); |
| 205 } else { |
| 206 expectStatic(decoder.get()); |
| 207 } |
| 208 } |
| 209 |
48 // Verify that the decoder can successfully decode the first frame when | 210 // Verify that the decoder can successfully decode the first frame when |
49 // initially only half of the frame data is received, resulting in a partially | 211 // initially only half of the frame data is received, resulting in a partially |
50 // decoded image, and then the rest of the image data is received. Verify that | 212 // decoded image, and then the rest of the image data is received. Verify that |
51 // the bitmap hashes of the two stages are different. Also verify that the final | 213 // the bitmap hashes of the two stages are different. Also verify that the final |
52 // bitmap hash is equivalent to the hash when all data is provided at once. | 214 // bitmap hash is equivalent to the hash when all data is provided at once. |
53 // | 215 // |
54 // This verifies that decoder correctly keeps track of where it stopped | 216 // This verifies that the decoder correctly keeps track of where it stopped |
55 // decoding when the image was not yet fully received. | 217 // decoding when the image was not yet fully received. |
56 void testProgressiveDecodingContinuesAfterFullData(const char* pngFile, | 218 void testProgressiveDecodingContinuesAfterFullData(const char* pngFile, |
57 size_t offsetMidFirstFrame) { | 219 size_t offsetMidFirstFrame) { |
58 auto fullData = readFile(pngFile); | 220 auto fullData = readFile(pngFile); |
59 ASSERT_FALSE(fullData->isEmpty()); | 221 ASSERT_FALSE(fullData->isEmpty()); |
60 | 222 |
61 auto decoderUpfront = createDecoder(); | 223 auto decoderUpfront = createDecoder(); |
62 decoderUpfront->setData(fullData.get(), true); | 224 decoderUpfront->setData(fullData.get(), true); |
63 EXPECT_GE(1u, decoderUpfront->frameCount()); | 225 EXPECT_GE(decoderUpfront->frameCount(), 1u); |
64 const ImageFrame* const frameUpfront = decoderUpfront->frameBufferAtIndex(0); | 226 const ImageFrame* const frameUpfront = decoderUpfront->frameBufferAtIndex(0); |
65 ASSERT_EQ(ImageFrame::FrameComplete, frameUpfront->getStatus()); | 227 ASSERT_EQ(ImageFrame::FrameComplete, frameUpfront->getStatus()); |
66 const unsigned hashUpfront = hashBitmap(frameUpfront->bitmap()); | 228 const unsigned hashUpfront = hashBitmap(frameUpfront->bitmap()); |
67 | 229 |
68 auto decoder = createDecoder(); | 230 auto decoder = createDecoder(); |
69 RefPtr<SharedBuffer> partialData = | 231 RefPtr<SharedBuffer> partialData = |
70 SharedBuffer::create(fullData->data(), offsetMidFirstFrame); | 232 SharedBuffer::create(fullData->data(), offsetMidFirstFrame); |
71 decoder->setData(partialData, false); | 233 decoder->setData(partialData, false); |
72 | 234 |
73 EXPECT_EQ(1u, decoder->frameCount()); | 235 EXPECT_EQ(1u, decoder->frameCount()); |
74 const ImageFrame* frame = decoder->frameBufferAtIndex(0); | 236 const ImageFrame* frame = decoder->frameBufferAtIndex(0); |
75 EXPECT_EQ(frame->getStatus(), ImageFrame::FramePartial); | 237 EXPECT_EQ(frame->getStatus(), ImageFrame::FramePartial); |
76 const unsigned hashPartial = hashBitmap(frame->bitmap()); | 238 const unsigned hashPartial = hashBitmap(frame->bitmap()); |
77 | 239 |
78 decoder->setData(fullData.get(), true); | 240 decoder->setData(fullData.get(), true); |
79 frame = decoder->frameBufferAtIndex(0); | 241 frame = decoder->frameBufferAtIndex(0); |
80 EXPECT_EQ(frame->getStatus(), ImageFrame::FrameComplete); | 242 EXPECT_EQ(frame->getStatus(), ImageFrame::FrameComplete); |
81 const unsigned hashFull = hashBitmap(frame->bitmap()); | 243 const unsigned hashFull = hashBitmap(frame->bitmap()); |
82 | 244 |
83 EXPECT_FALSE(decoder->failed()); | 245 EXPECT_FALSE(decoder->failed()); |
84 EXPECT_NE(hashFull, hashPartial); | 246 EXPECT_NE(hashFull, hashPartial); |
85 EXPECT_EQ(hashFull, hashUpfront); | 247 EXPECT_EQ(hashFull, hashUpfront); |
86 } | 248 } |
87 | 249 |
88 // Modify the frame data bytes for frame |frameIndex| so that decoding fails. | 250 // Modify the frame data bytes for frame |frameIndex| so that decoding fails. |
89 // Parsing should work fine, and is checked with |expectedFrameCountBefore|. If | 251 // Parsing should work fine, and is checked with |expectedFrameCount|. |
90 // the failure should invalidate the decoder, |expectFailure| should be set to | |
91 // true. If not, |expectedFrameCountAfter| should indicate the new frame count | |
92 // after the failure. | |
93 void testFailureDuringDecode(const char* file, | 252 void testFailureDuringDecode(const char* file, |
94 size_t idatOffset, | 253 size_t idatOffset, |
95 size_t frameIndex, | 254 size_t frameIndex, |
96 bool expectFailure, | 255 size_t expectedFrameCount) { |
97 size_t expectedFrameCountBefore, | |
98 size_t expectedFrameCountAfter = 0u) { | |
99 RefPtr<SharedBuffer> fullData = readFile(file); | 256 RefPtr<SharedBuffer> fullData = readFile(file); |
100 ASSERT_FALSE(fullData->isEmpty()); | 257 ASSERT_FALSE(fullData->isEmpty()); |
101 | 258 |
102 // This is the offset where the frame data chunk frame |frameIndex| starts. | 259 // This is the offset where the frame data chunk frame |frameIndex| starts. |
103 RefPtr<SharedBuffer> data = | 260 RefPtr<SharedBuffer> data = |
104 SharedBuffer::create(fullData->data(), idatOffset + 8u); | 261 SharedBuffer::create(fullData->data(), idatOffset + 8u); |
105 // Repeat the first 8 bytes of the frame data. This should result in a | 262 // Repeat the first 8 bytes of the frame data. This should result in a |
106 // successful parse, since frame data is not analyzed in that step, but | 263 // successful parse, since frame data is not analyzed in that step, but |
107 // should give an error during decoding. | 264 // should give an error during decoding. |
108 data->append(fullData->data() + idatOffset, 8u); | 265 data->append(fullData->data() + idatOffset, 8u); |
109 data->append(fullData->data() + idatOffset + 16u, | 266 data->append(fullData->data() + idatOffset + 16u, |
110 fullData->size() - idatOffset - 16u); | 267 fullData->size() - idatOffset - 16u); |
111 | 268 |
112 auto decoder = createDecoder(); | 269 auto decoder = createDecoder(); |
113 decoder->setData(data.get(), true); | 270 decoder->setData(data.get(), true); |
114 | 271 |
115 EXPECT_EQ(expectedFrameCountBefore, decoder->frameCount()); | 272 EXPECT_EQ(expectedFrameCount, decoder->frameCount()); |
116 | 273 |
117 const ImageFrame* const frame = decoder->frameBufferAtIndex(frameIndex); | 274 decoder->frameBufferAtIndex(frameIndex); |
118 EXPECT_EQ(expectFailure, decoder->failed()); | 275 ASSERT_EQ(true, decoder->failed()); |
119 if (!expectFailure) { | 276 |
120 EXPECT_EQ(expectedFrameCountAfter, decoder->frameCount()); | 277 EXPECT_EQ(expectedFrameCount, decoder->frameCount()); |
121 EXPECT_EQ(ImageFrame::FrameEmpty, frame->getStatus()); | |
122 } | |
123 } | 278 } |
124 | 279 |
125 } // Anonymous namespace | 280 } // Anonymous namespace |
126 | 281 |
| 282 // Animated PNG Tests |
| 283 |
| 284 TEST(AnimatedPNGTests, sizeTest) { |
| 285 testSize( |
| 286 "/LayoutTests/images/resources/" |
| 287 "png-animated-idat-part-of-animation.png", |
| 288 IntSize(5, 5)); |
| 289 testSize( |
| 290 "/LayoutTests/images/resources/" |
| 291 "png-animated-idat-not-part-of-animation.png", |
| 292 IntSize(227, 35)); |
| 293 } |
| 294 |
| 295 TEST(AnimatedPNGTests, repetitionCountTest) { |
| 296 testRepetitionCount( |
| 297 "/LayoutTests/images/resources/" |
| 298 "png-animated-idat-part-of-animation.png", |
| 299 6u); |
| 300 // This is an "animated" image with only one frame, that is, the IDAT is |
| 301 // ignored and there is one fdAT frame. so it should be considered |
| 302 // non-animated. |
| 303 testRepetitionCount( |
| 304 "/LayoutTests/images/resources/" |
| 305 "png-animated-idat-not-part-of-animation.png", |
| 306 cAnimationNone); |
| 307 } |
| 308 |
| 309 // Test if the decoded metdata corresponds to the defined expectations |
| 310 TEST(AnimatedPNGTests, MetaDataTest) { |
| 311 const char* pngFile = |
| 312 "/LayoutTests/images/resources/" |
| 313 "png-animated-idat-part-of-animation.png"; |
| 314 constexpr size_t expectedFrameCount = 4; |
| 315 |
| 316 auto decoder = createDecoderWithPngData(pngFile); |
| 317 ASSERT_EQ(expectedFrameCount, decoder->frameCount()); |
| 318 for (size_t i = 0; i < expectedFrameCount; i++) { |
| 319 compareFrameWithExpectation(pngAnimatedFrameInfo[i], |
| 320 decoder->frameBufferAtIndex(i)); |
| 321 } |
| 322 } |
| 323 |
| 324 TEST(AnimatedPNGTests, EmptyFrame) { |
| 325 const char* pngFile = "/LayoutTests/images/resources/empty-frame.png"; |
| 326 auto decoder = createDecoderWithPngData(pngFile); |
| 327 // Frame 0 is empty. Ensure that decoding frame 1 (which depends on frame 0) |
| 328 // fails (rather than crashing). |
| 329 EXPECT_EQ(2u, decoder->frameCount()); |
| 330 EXPECT_FALSE(decoder->failed()); |
| 331 |
| 332 ImageFrame* frame = decoder->frameBufferAtIndex(1); |
| 333 EXPECT_TRUE(decoder->failed()); |
| 334 ASSERT_NE(nullptr, frame); |
| 335 EXPECT_EQ(ImageFrame::FrameEmpty, frame->getStatus()); |
| 336 } |
| 337 |
| 338 TEST(AnimatedPNGTests, ByteByByteSizeAvailable) { |
| 339 testSizeByteByByte( |
| 340 "/LayoutTests/images/resources/" |
| 341 "png-animated-idat-part-of-animation.png", |
| 342 141u, IntSize(5, 5)); |
| 343 testSizeByteByByte( |
| 344 "/LayoutTests/images/resources/" |
| 345 "png-animated-idat-not-part-of-animation.png", |
| 346 79u, IntSize(227, 35)); |
| 347 } |
| 348 |
| 349 TEST(AnimatedPNGTests, ByteByByteMetaData) { |
| 350 const char* pngFile = |
| 351 "/LayoutTests/images/resources/" |
| 352 "png-animated-idat-part-of-animation.png"; |
| 353 constexpr size_t expectedFrameCount = 4; |
| 354 |
| 355 // These are the byte offsets where each frame should have been parsed. |
| 356 // It boils down to the offset of the first fcTL / IEND after the last |
| 357 // frame data chunk, plus 8 bytes for recognition. The exception on this is |
| 358 // the first frame, which is reported when its first framedata is seen. |
| 359 size_t frameOffsets[expectedFrameCount] = {141, 249, 322, 430}; |
| 360 |
| 361 auto decoder = createDecoder(); |
| 362 auto data = readFile(pngFile); |
| 363 ASSERT_FALSE(data->isEmpty()); |
| 364 size_t framesParsed = 0; |
| 365 |
| 366 const char* source = data->data(); |
| 367 RefPtr<SharedBuffer> partialData = SharedBuffer::create(); |
| 368 for (size_t length = 1; length <= frameOffsets[expectedFrameCount - 1]; |
| 369 length++) { |
| 370 partialData->append(source++, 1u); |
| 371 decoder->setData(partialData.get(), false); |
| 372 EXPECT_FALSE(decoder->failed()); |
| 373 if (length < frameOffsets[framesParsed]) { |
| 374 EXPECT_EQ(framesParsed, decoder->frameCount()); |
| 375 } else { |
| 376 ASSERT_EQ(framesParsed + 1, decoder->frameCount()); |
| 377 compareFrameWithExpectation(pngAnimatedFrameInfo[framesParsed], |
| 378 decoder->frameBufferAtIndex(framesParsed)); |
| 379 framesParsed++; |
| 380 } |
| 381 } |
| 382 EXPECT_EQ(expectedFrameCount, decoder->frameCount()); |
| 383 EXPECT_FALSE(decoder->failed()); |
| 384 } |
| 385 |
| 386 TEST(AnimatedPNGTests, TestRandomFrameDecode) { |
| 387 testRandomFrameDecode(&createDecoder, |
| 388 "/LayoutTests/images/resources/" |
| 389 "png-animated-idat-part-of-animation.png", |
| 390 2u); |
| 391 } |
| 392 |
| 393 TEST(AnimatedPNGTests, TestDecodeAfterReallocation) { |
| 394 testDecodeAfterReallocatingData(&createDecoder, |
| 395 "/LayoutTests/images/resources/" |
| 396 "png-animated-idat-part-of-animation.png"); |
| 397 } |
| 398 |
| 399 TEST(AnimatedPNGTests, ProgressiveDecode) { |
| 400 testProgressiveDecoding(&createDecoder, |
| 401 "/LayoutTests/images/resources/" |
| 402 "png-animated-idat-part-of-animation.png", |
| 403 13u); |
| 404 } |
| 405 |
| 406 TEST(AnimatedPNGTests, ParseAndDecodeByteByByte) { |
| 407 testByteByByteDecode(&createDecoder, |
| 408 "/LayoutTests/images/resources/" |
| 409 "png-animated-idat-part-of-animation.png", |
| 410 4u, 6u); |
| 411 } |
| 412 |
| 413 TEST(AnimatedPNGTests, FailureDuringParsing) { |
| 414 // Test the first fcTL in the stream. Because no frame data has been set at |
| 415 // this point, the expected frame count is zero. 95 bytes is just before the |
| 416 // first fcTL chunk, at which the first frame is detected. This is before the |
| 417 // IDAT, so it should be treated as a static image. |
| 418 testInvalidFctlSize( |
| 419 "/LayoutTests/images/resources/" |
| 420 "png-animated-idat-part-of-animation.png", |
| 421 95u, 0u, false); |
| 422 |
| 423 // Test for the third fcTL in the stream. This should see 1 frame before the |
| 424 // fcTL, and then fail when parsing it. |
| 425 testInvalidFctlSize( |
| 426 "/LayoutTests/images/resources/" |
| 427 "png-animated-idat-part-of-animation.png", |
| 428 241u, 1u, true); |
| 429 } |
| 430 |
| 431 TEST(AnimatedPNGTests, ActlErrors) { |
| 432 const char* pngFile = |
| 433 "/LayoutTests/images/resources/" |
| 434 "png-animated-idat-part-of-animation.png"; |
| 435 auto data = readFile(pngFile); |
| 436 ASSERT_FALSE(data->isEmpty()); |
| 437 |
| 438 const size_t offsetActl = 33u; |
| 439 const size_t acTLSize = 20u; |
| 440 { |
| 441 // Remove the acTL chunk from the stream. This results in a static image. |
| 442 RefPtr<SharedBuffer> noActlData = |
| 443 SharedBuffer::create(data->data(), offsetActl); |
| 444 noActlData->append(data->data() + offsetActl + acTLSize, |
| 445 data->size() - offsetActl - acTLSize); |
| 446 |
| 447 auto decoder = createDecoder(); |
| 448 decoder->setData(noActlData, true); |
| 449 EXPECT_EQ(1u, decoder->frameCount()); |
| 450 EXPECT_FALSE(decoder->failed()); |
| 451 EXPECT_EQ(cAnimationNone, decoder->repetitionCount()); |
| 452 } |
| 453 |
| 454 // Store the acTL for more tests. |
| 455 char acTL[acTLSize]; |
| 456 memcpy(acTL, data->data() + offsetActl, acTLSize); |
| 457 |
| 458 // Insert an extra acTL at a couple of different offsets. |
| 459 // Prior to the IDAT, this should result in a static image. After, this |
| 460 // should fail. |
| 461 const struct { |
| 462 size_t offset; |
| 463 bool shouldFail; |
| 464 } gRecs[] = {{8u, false}, |
| 465 {offsetActl, false}, |
| 466 {133u, false}, |
| 467 {172u, true}, |
| 468 {422u, true}}; |
| 469 for (auto rec : gRecs) { |
| 470 const size_t offset = rec.offset; |
| 471 RefPtr<SharedBuffer> extraActlData = |
| 472 SharedBuffer::create(data->data(), offset); |
| 473 extraActlData->append(acTL, acTLSize); |
| 474 extraActlData->append(data->data() + offset, data->size() - offset); |
| 475 auto decoder = createDecoder(); |
| 476 decoder->setData(extraActlData, true); |
| 477 EXPECT_EQ(rec.shouldFail ? 0u : 1u, decoder->frameCount()); |
| 478 EXPECT_EQ(rec.shouldFail, decoder->failed()); |
| 479 } |
| 480 |
| 481 // An acTL after IDAT is ignored. |
| 482 pngFile = |
| 483 "/LayoutTests/images/resources/" |
| 484 "cHRM_color_spin.png"; |
| 485 { |
| 486 auto data2 = readFile(pngFile); |
| 487 ASSERT_FALSE(data2->isEmpty()); |
| 488 const size_t postIDATOffset = 30971u; |
| 489 for (size_t times = 0; times < 2; times++) { |
| 490 RefPtr<SharedBuffer> extraActlData = |
| 491 SharedBuffer::create(data2->data(), postIDATOffset); |
| 492 for (size_t i = 0; i < times; i++) |
| 493 extraActlData->append(acTL, acTLSize); |
| 494 extraActlData->append(data2->data() + postIDATOffset, |
| 495 data2->size() - postIDATOffset); |
| 496 |
| 497 auto decoder = createDecoder(); |
| 498 decoder->setData(extraActlData, true); |
| 499 EXPECT_EQ(1u, decoder->frameCount()); |
| 500 EXPECT_FALSE(decoder->failed()); |
| 501 EXPECT_EQ(cAnimationNone, decoder->repetitionCount()); |
| 502 EXPECT_NE(nullptr, decoder->frameBufferAtIndex(0)); |
| 503 EXPECT_FALSE(decoder->failed()); |
| 504 } |
| 505 } |
| 506 } |
| 507 |
| 508 TEST(AnimatedPNGTests, fdatBeforeIdat) { |
| 509 const char* pngFile = |
| 510 "/LayoutTests/images/resources/" |
| 511 "png-animated-idat-not-part-of-animation.png"; |
| 512 auto data = readFile(pngFile); |
| 513 ASSERT_FALSE(data->isEmpty()); |
| 514 |
| 515 // Insert fcTL and fdAT prior to the IDAT |
| 516 const size_t idatOffset = 71u; |
| 517 RefPtr<SharedBuffer> modifiedData = |
| 518 SharedBuffer::create(data->data(), idatOffset); |
| 519 // Copy fcTL and fdAT |
| 520 const size_t fctlPlusFdatSize = 38u + 1566u; |
| 521 modifiedData->append(data->data() + 2519u, fctlPlusFdatSize); |
| 522 // Copy IDAT |
| 523 modifiedData->append(data->data() + idatOffset, 2448u); |
| 524 // Copy the remaining |
| 525 modifiedData->append(data->data() + 4123u, 39u + 12u); |
| 526 // Data has just been rearranged. |
| 527 ASSERT_EQ(data->size(), modifiedData->size()); |
| 528 |
| 529 { |
| 530 // This broken APNG will be treated as a static png. |
| 531 auto decoder = createDecoder(); |
| 532 decoder->setData(modifiedData.get(), true); |
| 533 expectStatic(decoder.get()); |
| 534 } |
| 535 |
| 536 { |
| 537 // Remove the acTL from the modified image. It now has fdAT before |
| 538 // IDAT, but no acTL, so fdAT should be ignored. |
| 539 const size_t offsetActl = 33u; |
| 540 const size_t acTLSize = 20u; |
| 541 RefPtr<SharedBuffer> modifiedData2 = |
| 542 SharedBuffer::create(modifiedData->data(), offsetActl); |
| 543 modifiedData2->append(modifiedData->data() + offsetActl + acTLSize, |
| 544 modifiedData->size() - offsetActl); |
| 545 auto decoder = createDecoder(); |
| 546 decoder->setData(modifiedData2.get(), true); |
| 547 expectStatic(decoder.get()); |
| 548 |
| 549 // Likewise, if an acTL follows the fdAT, it is ignored. |
| 550 const size_t insertionOffset = idatOffset + fctlPlusFdatSize - acTLSize; |
| 551 RefPtr<SharedBuffer> modifiedData3 = |
| 552 SharedBuffer::create(modifiedData2->data(), insertionOffset); |
| 553 modifiedData3->append(data->data() + offsetActl, acTLSize); |
| 554 modifiedData3->append(modifiedData2->data() + insertionOffset, |
| 555 modifiedData2->size() - insertionOffset); |
| 556 decoder = createDecoder(); |
| 557 decoder->setData(modifiedData3.get(), true); |
| 558 expectStatic(decoder.get()); |
| 559 } |
| 560 } |
| 561 |
| 562 TEST(AnimatedPNGTests, IdatSizeMismatch) { |
| 563 // The default image must fill the image |
| 564 const char* pngFile = |
| 565 "/LayoutTests/images/resources/" |
| 566 "png-animated-idat-part-of-animation.png"; |
| 567 auto data = readFile(pngFile); |
| 568 ASSERT_FALSE(data->isEmpty()); |
| 569 |
| 570 const size_t fctlOffset = 95u; |
| 571 RefPtr<SharedBuffer> modifiedData = |
| 572 SharedBuffer::create(data->data(), fctlOffset); |
| 573 const size_t fctlSize = 38u; |
| 574 png_byte fctl[fctlSize]; |
| 575 memcpy(fctl, data->data() + fctlOffset, fctlSize); |
| 576 // Set the height to a smaller value, so it does not fill the image. |
| 577 writeUint32(3, fctl + 16); |
| 578 // Correct the crc |
| 579 writeUint32(3210324191, fctl + 34); |
| 580 modifiedData->append((const char*)fctl, fctlSize); |
| 581 const size_t afterFctl = fctlOffset + fctlSize; |
| 582 modifiedData->append(data->data() + afterFctl, data->size() - afterFctl); |
| 583 |
| 584 auto decoder = createDecoder(); |
| 585 decoder->setData(modifiedData.get(), true); |
| 586 expectStatic(decoder.get()); |
| 587 } |
| 588 |
| 589 // Originally, the third frame has an offset of (1,2) and a size of (3,2). By |
| 590 // changing the offset to (4,4), the frame rect is no longer within the image |
| 591 // size of 5x5. This results in a failure. |
| 592 TEST(AnimatedPNGTests, VerifyFrameOutsideImageSizeFails) { |
| 593 const char* pngFile = |
| 594 "/LayoutTests/images/resources/" |
| 595 "png-animated-idat-part-of-animation.png"; |
| 596 auto data = readFile(pngFile); |
| 597 auto decoder = createDecoder(); |
| 598 ASSERT_FALSE(data->isEmpty()); |
| 599 |
| 600 const size_t offsetThirdFctl = 241; |
| 601 RefPtr<SharedBuffer> modifiedData = |
| 602 SharedBuffer::create(data->data(), offsetThirdFctl); |
| 603 const size_t fctlSize = 38u; |
| 604 png_byte fctl[fctlSize]; |
| 605 memcpy(fctl, data->data() + offsetThirdFctl, fctlSize); |
| 606 // Modify offset and crc. |
| 607 writeUint32(4, fctl + 20u); |
| 608 writeUint32(4, fctl + 24u); |
| 609 writeUint32(3700322018, fctl + 34u); |
| 610 |
| 611 modifiedData->append(const_cast<const char*>(reinterpret_cast<char*>(fctl)), |
| 612 fctlSize); |
| 613 modifiedData->append(data->data() + offsetThirdFctl + fctlSize, |
| 614 data->size() - offsetThirdFctl - fctlSize); |
| 615 |
| 616 decoder->setData(modifiedData, true); |
| 617 |
| 618 IntSize expectedSize(5, 5); |
| 619 EXPECT_TRUE(decoder->isSizeAvailable()); |
| 620 EXPECT_EQ(expectedSize, decoder->size()); |
| 621 |
| 622 const size_t expectedFrameCount = 0; |
| 623 EXPECT_EQ(expectedFrameCount, decoder->frameCount()); |
| 624 EXPECT_TRUE(decoder->failed()); |
| 625 } |
| 626 |
| 627 TEST(AnimatedPNGTests, ProgressiveDecodingContinuesAfterFullData) { |
| 628 // 160u is a randomly chosen offset in the IDAT chunk of the first frame. |
| 629 testProgressiveDecodingContinuesAfterFullData( |
| 630 "/LayoutTests/images/resources/" |
| 631 "png-animated-idat-part-of-animation.png", |
| 632 160u); |
| 633 } |
| 634 |
| 635 TEST(AnimatedPNGTests, RandomDecodeAfterClearFrameBufferCache) { |
| 636 testRandomDecodeAfterClearFrameBufferCache( |
| 637 &createDecoder, |
| 638 "/LayoutTests/images/resources/" |
| 639 "png-animated-idat-part-of-animation.png", |
| 640 2u); |
| 641 } |
| 642 |
| 643 TEST(AnimatedPNGTests, VerifyAlphaBlending) { |
| 644 testAlphaBlending(&createDecoder, |
| 645 "/LayoutTests/images/resources/" |
| 646 "png-animated-idat-part-of-animation.png"); |
| 647 } |
| 648 |
| 649 // This tests if the frame count gets set correctly when parsing frameCount |
| 650 // fails in one of the parsing queries. |
| 651 // |
| 652 // First, enough data is provided such that two frames should be registered. |
| 653 // The decoder should at this point not be in the failed status. |
| 654 // |
| 655 // Then, we provide the rest of the data except for the last IEND chunk, but |
| 656 // tell the decoder that this is all the data we have. The frame count should |
| 657 // be three, since one extra frame should be discovered. The fourth frame |
| 658 // should *not* be registered since the reader should not be able to determine |
| 659 // where the frame ends. The decoder should *not* be in the failed state since |
| 660 // there are three frames which can be shown. |
| 661 // Attempting to decode the third frame should fail, since the file is |
| 662 // truncated. |
| 663 TEST(AnimatedPNGTests, FailureMissingIendChunk) { |
| 664 RefPtr<SharedBuffer> fullData = readFile( |
| 665 "/LayoutTests/images/resources/" |
| 666 "png-animated-idat-part-of-animation.png"); |
| 667 ASSERT_FALSE(fullData->isEmpty()); |
| 668 auto decoder = createDecoder(); |
| 669 |
| 670 const size_t offsetTwoFrames = 249; |
| 671 const size_t expectedFramesAfter249Bytes = 2; |
| 672 RefPtr<SharedBuffer> tempData = |
| 673 SharedBuffer::create(fullData->data(), offsetTwoFrames); |
| 674 decoder->setData(tempData.get(), false); |
| 675 EXPECT_EQ(expectedFramesAfter249Bytes, decoder->frameCount()); |
| 676 EXPECT_FALSE(decoder->failed()); |
| 677 |
| 678 // Provide the rest of the data except for the last IEND chunk. |
| 679 const size_t expectedFramesAfterAllExcept12Bytes = 3; |
| 680 tempData = SharedBuffer::create(fullData->data(), fullData->size() - 12); |
| 681 decoder->setData(tempData.get(), true); |
| 682 ASSERT_EQ(expectedFramesAfterAllExcept12Bytes, decoder->frameCount()); |
| 683 |
| 684 for (size_t i = 0; i < expectedFramesAfterAllExcept12Bytes; i++) { |
| 685 EXPECT_FALSE(decoder->failed()); |
| 686 decoder->frameBufferAtIndex(i); |
| 687 } |
| 688 |
| 689 EXPECT_TRUE(decoder->failed()); |
| 690 } |
| 691 |
| 692 TEST(AnimatedPNGTests, FailureDuringDecodingInvalidatesDecoder) { |
| 693 testFailureDuringDecode( |
| 694 "/LayoutTests/images/resources/" |
| 695 "png-animated-idat-part-of-animation.png", |
| 696 291u, // fdat offset for frame index 2, plus 12 to move past sequence |
| 697 // number. |
| 698 2u, // try to decode frame index 2 |
| 699 4u); // expected frame count before failure |
| 700 |
| 701 testFailureDuringDecode( |
| 702 "/LayoutTests/images/resources/" |
| 703 "png-animated-idat-part-of-animation.png", |
| 704 133u, // idat offset for frame index 0 |
| 705 0u, // try to decode frame index 0 |
| 706 4u); // expected frame count before failure |
| 707 } |
| 708 |
| 709 // Verify that a malformatted PNG, where the IEND appears before any frame data |
| 710 // (IDAT), invalidates the decoder. |
| 711 TEST(AnimatedPNGTests, VerifyIENDBeforeIDATInvalidatesDecoder) { |
| 712 RefPtr<SharedBuffer> fullData = readFile( |
| 713 "/LayoutTests/images/resources/" |
| 714 "png-animated-idat-part-of-animation.png"); |
| 715 ASSERT_FALSE(fullData->isEmpty()); |
| 716 auto decoder = createDecoder(); |
| 717 |
| 718 const size_t offsetIDAT = 133; |
| 719 RefPtr<SharedBuffer> data = |
| 720 SharedBuffer::create(fullData->data(), offsetIDAT); |
| 721 data->append(fullData->data() + fullData->size() - 12u, 12u); |
| 722 data->append(fullData->data() + offsetIDAT, fullData->size() - offsetIDAT); |
| 723 decoder->setData(data.get(), true); |
| 724 |
| 725 const size_t expectedFrameCount = 0u; |
| 726 EXPECT_EQ(expectedFrameCount, decoder->frameCount()); |
| 727 EXPECT_TRUE(decoder->failed()); |
| 728 } |
| 729 |
| 730 // For animated images, frameIsCompleteAtIndex(i) should return true if the |
| 731 // i-th frame is fully received. The frames don't need to be successfully |
| 732 // decoded. |
| 733 TEST(AnimatedPNGTests, VerifyFrameCompleteBehavior) { |
| 734 const char* pngFile = |
| 735 "/LayoutTests/images/resources/" |
| 736 "png-animated-idat-part-of-animation.png"; |
| 737 RefPtr<SharedBuffer> fullData = readFile(pngFile); |
| 738 ASSERT_FALSE(fullData->isEmpty()); |
| 739 auto decoder = createDecoder(); |
| 740 |
| 741 // When not all data for the first frame has been received, |
| 742 // frameIsCompleteAtIndex(0) should return false. |
| 743 const size_t offsetMidwayFirstFrame = 160; |
| 744 RefPtr<SharedBuffer> data = |
| 745 SharedBuffer::create(fullData->data(), offsetMidwayFirstFrame); |
| 746 decoder->setData(data.get(), false); |
| 747 EXPECT_EQ(1u, decoder->frameCount()); |
| 748 ASSERT_FALSE(decoder->failed()); |
| 749 EXPECT_FALSE(decoder->frameIsCompleteAtIndex(0)); |
| 750 |
| 751 // When all image data is received, every frame should be complete. |
| 752 const size_t expectedFrameCount = 4; |
| 753 decoder->setData(fullData.get(), true); |
| 754 EXPECT_EQ(expectedFrameCount, decoder->frameCount()); |
| 755 for (size_t index = 0; index < expectedFrameCount; index++) |
| 756 EXPECT_TRUE(decoder->frameIsCompleteAtIndex(index)); |
| 757 } |
| 758 |
| 759 // All IDAT chunks must be before all fdAT chunks |
| 760 TEST(AnimatedPNGTests, MixedDataChunks) { |
| 761 const char* pngFile = |
| 762 "/LayoutTests/images/resources/" |
| 763 "png-animated-idat-part-of-animation.png"; |
| 764 RefPtr<SharedBuffer> fullData = readFile(pngFile); |
| 765 ASSERT_FALSE(fullData->isEmpty()); |
| 766 |
| 767 // Add an extra fdAT after the first IDAT, skipping fcTL. |
| 768 const size_t postIDAT = 172u; |
| 769 RefPtr<SharedBuffer> data = SharedBuffer::create(fullData->data(), postIDAT); |
| 770 const size_t fcTLSize = 38u; |
| 771 const size_t fdATSize = 31u; |
| 772 png_byte fdAT[fdATSize]; |
| 773 memcpy(fdAT, fullData->data() + postIDAT + fcTLSize, fdATSize); |
| 774 // Modify the sequence number |
| 775 writeUint32(1u, fdAT + 8); |
| 776 data->append((const char*)fdAT, fdATSize); |
| 777 const size_t IENDOffset = 422u; |
| 778 data->append(fullData->data() + IENDOffset, fullData->size() - IENDOffset); |
| 779 auto decoder = createDecoder(); |
| 780 decoder->setData(data.get(), true); |
| 781 decoder->frameCount(); |
| 782 EXPECT_TRUE(decoder->failed()); |
| 783 |
| 784 // Insert an IDAT after an fdAT. |
| 785 const size_t postfdAT = postIDAT + fcTLSize + fdATSize; |
| 786 data = SharedBuffer::create(fullData->data(), postfdAT); |
| 787 const size_t IDATOffset = 133u; |
| 788 data->append(fullData->data() + IDATOffset, postIDAT - IDATOffset); |
| 789 // Append the rest. |
| 790 data->append(fullData->data() + postIDAT, fullData->size() - postIDAT); |
| 791 decoder = createDecoder(); |
| 792 decoder->setData(data.get(), true); |
| 793 decoder->frameCount(); |
| 794 EXPECT_TRUE(decoder->failed()); |
| 795 } |
| 796 |
| 797 // Verify that erroneous values for the disposal method and alpha blending |
| 798 // cause the decoder to fail. |
| 799 TEST(AnimatedPNGTests, VerifyInvalidDisposalAndBlending) { |
| 800 const char* pngFile = |
| 801 "/LayoutTests/images/resources/" |
| 802 "png-animated-idat-part-of-animation.png"; |
| 803 RefPtr<SharedBuffer> fullData = readFile(pngFile); |
| 804 ASSERT_FALSE(fullData->isEmpty()); |
| 805 auto decoder = createDecoder(); |
| 806 |
| 807 // The disposal byte in the frame control chunk is the 24th byte, alpha |
| 808 // blending the 25th. |offsetDisposalOp| is 241 bytes to get to the third |
| 809 // fctl chunk, 8 bytes to skip the length and tag bytes, and 24 bytes to get |
| 810 // to the disposal op. |
| 811 // |
| 812 // Write invalid values to the disposal and alpha blending byte, correct the |
| 813 // crc and append the rest of the buffer. |
| 814 const size_t offsetDisposalOp = 241 + 8 + 24; |
| 815 RefPtr<SharedBuffer> data = |
| 816 SharedBuffer::create(fullData->data(), offsetDisposalOp); |
| 817 png_byte disposalAndBlending[6u]; |
| 818 disposalAndBlending[0] = 7; |
| 819 disposalAndBlending[1] = 9; |
| 820 writeUint32(2408835439u, disposalAndBlending + 2u); |
| 821 data->append(reinterpret_cast<char*>(disposalAndBlending), 6u); |
| 822 data->append(fullData->data() + offsetDisposalOp + 6u, |
| 823 fullData->size() - offsetDisposalOp - 6u); |
| 824 |
| 825 decoder->setData(data.get(), true); |
| 826 decoder->frameCount(); |
| 827 ASSERT_TRUE(decoder->failed()); |
| 828 } |
| 829 |
| 830 // This test verifies that the following situation does not invalidate the |
| 831 // decoder: |
| 832 // - Frame 0 is decoded progressively, but there's not enough data to fully |
| 833 // decode it. |
| 834 // - The rest of the image data is received. |
| 835 // - Frame X, with X > 0, and X does not depend on frame 0, is decoded. |
| 836 // - Frame 0 is decoded. |
| 837 // This is a tricky case since the decoder resets the png struct for each frame, |
| 838 // and this test verifies that it does not break the decoding of frame 0, even |
| 839 // though it already started in the first call. |
| 840 TEST(AnimatedPNGTests, VerifySuccessfulFirstFrameDecodeAfterLaterFrame) { |
| 841 const char* pngFile = |
| 842 "/LayoutTests/images/resources/" |
| 843 "png-animated-three-independent-frames.png"; |
| 844 auto decoder = createDecoder(); |
| 845 auto fullData = readFile(pngFile); |
| 846 ASSERT_FALSE(fullData->isEmpty()); |
| 847 |
| 848 // 160u is a randomly chosen offset in the IDAT chunk of the first frame. |
| 849 const size_t middleFirstFrame = 160u; |
| 850 RefPtr<SharedBuffer> data = |
| 851 SharedBuffer::create(fullData->data(), middleFirstFrame); |
| 852 decoder->setData(data.get(), false); |
| 853 |
| 854 ASSERT_EQ(1u, decoder->frameCount()); |
| 855 ASSERT_EQ(ImageFrame::FramePartial, |
| 856 decoder->frameBufferAtIndex(0)->getStatus()); |
| 857 |
| 858 decoder->setData(fullData.get(), true); |
| 859 ASSERT_EQ(3u, decoder->frameCount()); |
| 860 ASSERT_EQ(ImageFrame::FrameComplete, |
| 861 decoder->frameBufferAtIndex(1)->getStatus()); |
| 862 // The point is that this call does not decode frame 0, which it won't do if |
| 863 // it does not have it as its required previous frame. |
| 864 ASSERT_EQ(kNotFound, |
| 865 decoder->frameBufferAtIndex(1)->requiredPreviousFrameIndex()); |
| 866 |
| 867 EXPECT_EQ(ImageFrame::FrameComplete, |
| 868 decoder->frameBufferAtIndex(0)->getStatus()); |
| 869 EXPECT_FALSE(decoder->failed()); |
| 870 } |
| 871 |
127 // Static PNG tests | 872 // Static PNG tests |
128 | 873 |
129 TEST(StaticPNGTests, repetitionCountTest) { | 874 TEST(StaticPNGTests, repetitionCountTest) { |
130 testRepetitionCount("/LayoutTests/images/resources/png-simple.png", | 875 testRepetitionCount("/LayoutTests/images/resources/png-simple.png", |
131 cAnimationNone); | 876 cAnimationNone); |
132 } | 877 } |
133 | 878 |
134 TEST(StaticPNGTests, sizeTest) { | 879 TEST(StaticPNGTests, sizeTest) { |
135 testSize("/LayoutTests/images/resources/png-simple.png", IntSize(111, 29)); | 880 testSize("/LayoutTests/images/resources/png-simple.png", IntSize(111, 29)); |
136 } | 881 } |
137 | 882 |
138 TEST(StaticPNGTests, MetaDataTest) { | 883 TEST(StaticPNGTests, MetaDataTest) { |
139 const size_t expectedFrameCount = 1; | 884 const size_t expectedFrameCount = 1; |
140 const size_t expectedDuration = 0; | 885 const size_t expectedDuration = 0; |
141 auto decoder = | 886 auto decoder = |
142 createDecoderWithPngData("/LayoutTests/images/resources/png-simple.png"); | 887 createDecoderWithPngData("/LayoutTests/images/resources/png-simple.png"); |
143 EXPECT_EQ(expectedFrameCount, decoder->frameCount()); | 888 EXPECT_EQ(expectedFrameCount, decoder->frameCount()); |
144 EXPECT_EQ(expectedDuration, decoder->frameDurationAtIndex(0)); | 889 EXPECT_EQ(expectedDuration, decoder->frameDurationAtIndex(0)); |
145 } | 890 } |
146 | 891 |
| 892 TEST(StaticPNGTests, InvalidIHDRChunk) { |
| 893 testMissingDataBreaksDecoding("/LayoutTests/images/resources/png-simple.png", |
| 894 20u, 2u); |
| 895 } |
| 896 |
147 TEST(StaticPNGTests, ProgressiveDecoding) { | 897 TEST(StaticPNGTests, ProgressiveDecoding) { |
148 testProgressiveDecoding(&createDecoder, | 898 testProgressiveDecoding(&createDecoder, |
149 "/LayoutTests/images/resources/png-simple.png", 11u); | 899 "/LayoutTests/images/resources/png-simple.png", 11u); |
150 } | 900 } |
151 | 901 |
152 TEST(StaticPNGTests, ProgressiveDecodingContinuesAfterFullData) { | 902 TEST(StaticPNGTests, ProgressiveDecodingContinuesAfterFullData) { |
153 testProgressiveDecodingContinuesAfterFullData( | 903 testProgressiveDecodingContinuesAfterFullData( |
154 "/LayoutTests/images/resources/png-simple.png", 1000u); | 904 "/LayoutTests/images/resources/png-simple.png", 1000u); |
155 } | 905 } |
156 | 906 |
157 TEST(StaticPNGTests, FailureDuringDecodingInvalidatesDecoder) { | 907 TEST(StaticPNGTests, FailureDuringDecodingInvalidatesDecoder) { |
158 testFailureDuringDecode( | 908 testFailureDuringDecode( |
159 "/LayoutTests/images/resources/png-simple.png", | 909 "/LayoutTests/images/resources/png-simple.png", |
160 85u, // idat offset for frame index 0 | 910 85u, // idat offset for frame index 0 |
161 0u, // try to decode frame index 0 | 911 0u, // try to decode frame index 0 |
162 true, // expect the decoder to be invalidated after the failure | |
163 1u); // expected frame count before failure | 912 1u); // expected frame count before failure |
164 } | 913 } |
165 | 914 |
166 // For static images, frameIsCompleteAtIndex(0) should return true if and only | 915 // For static images, frameIsCompleteAtIndex(0) should return true if and only |
167 // if the frame is successfully decoded, not when it is fully received. | 916 // if the frame is successfully decoded, not when it is fully received. |
168 TEST(StaticPNGTests, VerifyFrameCompleteBehavior) { | 917 TEST(StaticPNGTests, VerifyFrameCompleteBehavior) { |
169 auto decoder = | 918 auto decoder = |
170 createDecoderWithPngData("/LayoutTests/images/resources/png-simple.png"); | 919 createDecoderWithPngData("/LayoutTests/images/resources/png-simple.png"); |
171 EXPECT_EQ(1u, decoder->frameCount()); | 920 EXPECT_EQ(1u, decoder->frameCount()); |
172 EXPECT_FALSE(decoder->frameIsCompleteAtIndex(0)); | 921 EXPECT_FALSE(decoder->frameIsCompleteAtIndex(0)); |
173 EXPECT_EQ(ImageFrame::FrameComplete, | 922 EXPECT_EQ(ImageFrame::FrameComplete, |
174 decoder->frameBufferAtIndex(0)->getStatus()); | 923 decoder->frameBufferAtIndex(0)->getStatus()); |
175 EXPECT_TRUE(decoder->frameIsCompleteAtIndex(0)); | 924 EXPECT_TRUE(decoder->frameIsCompleteAtIndex(0)); |
176 } | 925 } |
177 | 926 |
178 }; // namespace blink | 927 }; // namespace blink |
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