| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "Resources.h" |
| #include "SkBitmap.h" |
| #include "SkCodec.h" |
| #include "SkMD5.h" |
| #include "SkRandom.h" |
| #include "SkScaledCodec.h" |
| #include "SkScanlineDecoder.h" |
| #include "Test.h" |
| |
| static SkStreamAsset* resource(const char path[]) { |
| SkString fullPath = GetResourcePath(path); |
| return SkStream::NewFromFile(fullPath.c_str()); |
| } |
| |
| static void md5(const SkBitmap& bm, SkMD5::Digest* digest) { |
| SkAutoLockPixels autoLockPixels(bm); |
| SkASSERT(bm.getPixels()); |
| SkMD5 md5; |
| size_t rowLen = bm.info().bytesPerPixel() * bm.width(); |
| for (int y = 0; y < bm.height(); ++y) { |
| md5.update(static_cast<uint8_t*>(bm.getAddr(0, y)), rowLen); |
| } |
| md5.finish(*digest); |
| } |
| |
| /** |
| * Compute the digest for bm and compare it to a known good digest. |
| * @param r Reporter to assert that bm's digest matches goodDigest. |
| * @param goodDigest The known good digest to compare to. |
| * @param bm The bitmap to test. |
| */ |
| static void compare_to_good_digest(skiatest::Reporter* r, const SkMD5::Digest& goodDigest, |
| const SkBitmap& bm) { |
| SkMD5::Digest digest; |
| md5(bm, &digest); |
| REPORTER_ASSERT(r, digest == goodDigest); |
| } |
| |
| /** |
| * Test decoding an SkCodec to a particular SkImageInfo. |
| * |
| * Calling getPixels(info) should return expectedResult, and if goodDigest is non nullptr, |
| * the resulting decode should match. |
| */ |
| static void test_info(skiatest::Reporter* r, SkCodec* codec, const SkImageInfo& info, |
| SkCodec::Result expectedResult, const SkMD5::Digest* goodDigest) { |
| SkBitmap bm; |
| bm.allocPixels(info); |
| SkAutoLockPixels autoLockPixels(bm); |
| |
| SkCodec::Result result = codec->getPixels(info, bm.getPixels(), bm.rowBytes()); |
| REPORTER_ASSERT(r, result == expectedResult); |
| |
| if (goodDigest) { |
| compare_to_good_digest(r, *goodDigest, bm); |
| } |
| } |
| |
| SkIRect generate_random_subset(SkRandom* rand, int w, int h) { |
| SkIRect rect; |
| do { |
| rect.fLeft = rand->nextRangeU(0, w); |
| rect.fTop = rand->nextRangeU(0, h); |
| rect.fRight = rand->nextRangeU(0, w); |
| rect.fBottom = rand->nextRangeU(0, h); |
| rect.sort(); |
| } while (rect.isEmpty()); |
| return rect; |
| } |
| |
| static void check(skiatest::Reporter* r, |
| const char path[], |
| SkISize size, |
| bool supportsScanlineDecoding, |
| bool supportsSubsetDecoding, |
| bool supports565 = true) { |
| SkAutoTDelete<SkStream> stream(resource(path)); |
| if (!stream) { |
| SkDebugf("Missing resource '%s'\n", path); |
| return; |
| } |
| SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.detach())); |
| if (!codec) { |
| ERRORF(r, "Unable to decode '%s'", path); |
| return; |
| } |
| |
| // This test is used primarily to verify rewinding works properly. Using kN32 allows |
| // us to test this without the added overhead of creating different bitmaps depending |
| // on the color type (ex: building a color table for kIndex8). DM is where we test |
| // decodes to all possible destination color types. |
| SkImageInfo info = codec->getInfo().makeColorType(kN32_SkColorType); |
| REPORTER_ASSERT(r, info.dimensions() == size); |
| |
| { |
| // Test decoding to 565 |
| SkImageInfo info565 = info.makeColorType(kRGB_565_SkColorType); |
| SkCodec::Result expected = (supports565 && info.alphaType() == kOpaque_SkAlphaType) ? |
| SkCodec::kSuccess : SkCodec::kInvalidConversion; |
| test_info(r, codec, info565, expected, nullptr); |
| } |
| |
| SkBitmap bm; |
| bm.allocPixels(info); |
| SkAutoLockPixels autoLockPixels(bm); |
| SkCodec::Result result = |
| codec->getPixels(info, bm.getPixels(), bm.rowBytes(), nullptr, nullptr, nullptr); |
| REPORTER_ASSERT(r, result == SkCodec::kSuccess); |
| |
| SkMD5::Digest digest; |
| md5(bm, &digest); |
| |
| // verify that re-decoding gives the same result. |
| test_info(r, codec, info, SkCodec::kSuccess, &digest); |
| |
| { |
| // Check alpha type conversions |
| if (info.alphaType() == kOpaque_SkAlphaType) { |
| test_info(r, codec, info.makeAlphaType(kUnpremul_SkAlphaType), |
| SkCodec::kInvalidConversion, nullptr); |
| test_info(r, codec, info.makeAlphaType(kPremul_SkAlphaType), |
| SkCodec::kInvalidConversion, nullptr); |
| } else { |
| // Decoding to opaque should fail |
| test_info(r, codec, info.makeAlphaType(kOpaque_SkAlphaType), |
| SkCodec::kInvalidConversion, nullptr); |
| SkAlphaType otherAt = info.alphaType(); |
| if (kPremul_SkAlphaType == otherAt) { |
| otherAt = kUnpremul_SkAlphaType; |
| } else { |
| otherAt = kPremul_SkAlphaType; |
| } |
| // The other non-opaque alpha type should always succeed, but not match. |
| test_info(r, codec, info.makeAlphaType(otherAt), SkCodec::kSuccess, nullptr); |
| } |
| } |
| |
| // Scanline decoding follows. |
| |
| stream.reset(resource(path)); |
| SkAutoTDelete<SkScanlineDecoder> scanlineDecoder( |
| SkScanlineDecoder::NewFromStream(stream.detach())); |
| if (supportsScanlineDecoding) { |
| bm.eraseColor(SK_ColorYELLOW); |
| REPORTER_ASSERT(r, scanlineDecoder); |
| |
| REPORTER_ASSERT(r, scanlineDecoder->start(info) == SkCodec::kSuccess); |
| |
| for (int y = 0; y < info.height(); y++) { |
| result = scanlineDecoder->getScanlines(bm.getAddr(0, y), 1, 0); |
| REPORTER_ASSERT(r, result == SkCodec::kSuccess); |
| } |
| // verify that scanline decoding gives the same result. |
| if (SkScanlineDecoder::kTopDown_SkScanlineOrder == scanlineDecoder->getScanlineOrder()) { |
| compare_to_good_digest(r, digest, bm); |
| } |
| } else { |
| REPORTER_ASSERT(r, !scanlineDecoder); |
| } |
| |
| // The rest of this function tests decoding subsets, and will decode an arbitrary number of |
| // random subsets. |
| // Do not attempt to decode subsets of an image of only once pixel, since there is no |
| // meaningful subset. |
| if (size.width() * size.height() == 1) { |
| return; |
| } |
| |
| SkRandom rand; |
| SkIRect subset; |
| SkCodec::Options opts; |
| opts.fSubset = ⊂ |
| for (int i = 0; i < 5; i++) { |
| subset = generate_random_subset(&rand, size.width(), size.height()); |
| SkASSERT(!subset.isEmpty()); |
| const bool supported = codec->getValidSubset(&subset); |
| REPORTER_ASSERT(r, supported == supportsSubsetDecoding); |
| |
| SkImageInfo subsetInfo = info.makeWH(subset.width(), subset.height()); |
| SkBitmap bm; |
| bm.allocPixels(subsetInfo); |
| const SkCodec::Result result = codec->getPixels(bm.info(), bm.getPixels(), bm.rowBytes(), |
| &opts, nullptr, nullptr); |
| |
| if (supportsSubsetDecoding) { |
| REPORTER_ASSERT(r, result == SkCodec::kSuccess); |
| // Webp is the only codec that supports subsets, and it will have modified the subset |
| // to have even left/top. |
| REPORTER_ASSERT(r, SkIsAlign2(subset.fLeft) && SkIsAlign2(subset.fTop)); |
| } else { |
| // No subsets will work. |
| REPORTER_ASSERT(r, result == SkCodec::kUnimplemented); |
| } |
| } |
| } |
| |
| DEF_TEST(Codec, r) { |
| // WBMP |
| check(r, "mandrill.wbmp", SkISize::Make(512, 512), true, false); |
| |
| // WEBP |
| check(r, "baby_tux.webp", SkISize::Make(386, 395), false, true); |
| check(r, "color_wheel.webp", SkISize::Make(128, 128), false, true); |
| check(r, "yellow_rose.webp", SkISize::Make(400, 301), false, true); |
| |
| // BMP |
| check(r, "randPixels.bmp", SkISize::Make(8, 8), true, false); |
| |
| // ICO |
| // These two tests examine interestingly different behavior: |
| // Decodes an embedded BMP image |
| check(r, "color_wheel.ico", SkISize::Make(128, 128), false, false); |
| // Decodes an embedded PNG image |
| check(r, "google_chrome.ico", SkISize::Make(256, 256), false, false); |
| |
| // GIF |
| check(r, "box.gif", SkISize::Make(200, 55), true, false); |
| check(r, "color_wheel.gif", SkISize::Make(128, 128), true, false); |
| check(r, "randPixels.gif", SkISize::Make(8, 8), true, false); |
| |
| // JPG |
| check(r, "CMYK.jpg", SkISize::Make(642, 516), true, false, false); |
| check(r, "color_wheel.jpg", SkISize::Make(128, 128), true, false); |
| check(r, "grayscale.jpg", SkISize::Make(128, 128), true, false); |
| check(r, "mandrill_512_q075.jpg", SkISize::Make(512, 512), true, false); |
| check(r, "randPixels.jpg", SkISize::Make(8, 8), true, false); |
| |
| // PNG |
| check(r, "arrow.png", SkISize::Make(187, 312), true, false); |
| check(r, "baby_tux.png", SkISize::Make(240, 246), true, false); |
| check(r, "color_wheel.png", SkISize::Make(128, 128), true, false); |
| check(r, "half-transparent-white-pixel.png", SkISize::Make(1, 1), true, false); |
| check(r, "mandrill_128.png", SkISize::Make(128, 128), true, false); |
| check(r, "mandrill_16.png", SkISize::Make(16, 16), true, false); |
| check(r, "mandrill_256.png", SkISize::Make(256, 256), true, false); |
| check(r, "mandrill_32.png", SkISize::Make(32, 32), true, false); |
| check(r, "mandrill_512.png", SkISize::Make(512, 512), true, false); |
| check(r, "mandrill_64.png", SkISize::Make(64, 64), true, false); |
| check(r, "plane.png", SkISize::Make(250, 126), true, false); |
| check(r, "randPixels.png", SkISize::Make(8, 8), true, false); |
| check(r, "yellow_rose.png", SkISize::Make(400, 301), true, false); |
| } |
| |
| static void test_invalid_stream(skiatest::Reporter* r, const void* stream, size_t len) { |
| SkCodec* codec = SkCodec::NewFromStream(new SkMemoryStream(stream, len, false)); |
| // We should not have gotten a codec. Bots should catch us if we leaked anything. |
| REPORTER_ASSERT(r, !codec); |
| } |
| |
| // Ensure that SkCodec::NewFromStream handles freeing the passed in SkStream, |
| // even on failure. Test some bad streams. |
| DEF_TEST(Codec_leaks, r) { |
| // No codec should claim this as their format, so this tests SkCodec::NewFromStream. |
| const char nonSupportedStream[] = "hello world"; |
| // The other strings should look like the beginning of a file type, so we'll call some |
| // internal version of NewFromStream, which must also delete the stream on failure. |
| const unsigned char emptyPng[] = { 0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a }; |
| const unsigned char emptyJpeg[] = { 0xFF, 0xD8, 0xFF }; |
| const char emptyWebp[] = "RIFF1234WEBPVP"; |
| const char emptyBmp[] = { 'B', 'M' }; |
| const char emptyIco[] = { '\x00', '\x00', '\x01', '\x00' }; |
| const char emptyGif[] = "GIFVER"; |
| |
| test_invalid_stream(r, nonSupportedStream, sizeof(nonSupportedStream)); |
| test_invalid_stream(r, emptyPng, sizeof(emptyPng)); |
| test_invalid_stream(r, emptyJpeg, sizeof(emptyJpeg)); |
| test_invalid_stream(r, emptyWebp, sizeof(emptyWebp)); |
| test_invalid_stream(r, emptyBmp, sizeof(emptyBmp)); |
| test_invalid_stream(r, emptyIco, sizeof(emptyIco)); |
| test_invalid_stream(r, emptyGif, sizeof(emptyGif)); |
| } |
| |
| static void test_dimensions(skiatest::Reporter* r, const char path[]) { |
| // Create the codec from the resource file |
| SkAutoTDelete<SkStream> stream(resource(path)); |
| if (!stream) { |
| SkDebugf("Missing resource '%s'\n", path); |
| return; |
| } |
| SkAutoTDelete<SkCodec> codec(SkScaledCodec::NewFromStream(stream.detach())); |
| if (!codec) { |
| ERRORF(r, "Unable to create codec '%s'", path); |
| return; |
| } |
| |
| // Check that the decode is successful for a variety of scales |
| for (float scale = 0.05f; scale < 2.0f; scale += 0.05f) { |
| // Scale the output dimensions |
| SkISize scaledDims = codec->getScaledDimensions(scale); |
| SkImageInfo scaledInfo = codec->getInfo() |
| .makeWH(scaledDims.width(), scaledDims.height()) |
| .makeColorType(kN32_SkColorType); |
| |
| // Set up for the decode |
| size_t rowBytes = scaledDims.width() * sizeof(SkPMColor); |
| size_t totalBytes = scaledInfo.getSafeSize(rowBytes); |
| SkAutoTMalloc<SkPMColor> pixels(totalBytes); |
| |
| SkCodec::Result result = |
| codec->getPixels(scaledInfo, pixels.get(), rowBytes, nullptr, nullptr, nullptr); |
| REPORTER_ASSERT(r, SkCodec::kSuccess == result); |
| } |
| } |
| |
| // Ensure that onGetScaledDimensions returns valid image dimensions to use for decodes |
| DEF_TEST(Codec_Dimensions, r) { |
| // JPG |
| test_dimensions(r, "CMYK.jpg"); |
| test_dimensions(r, "color_wheel.jpg"); |
| test_dimensions(r, "grayscale.jpg"); |
| test_dimensions(r, "mandrill_512_q075.jpg"); |
| test_dimensions(r, "randPixels.jpg"); |
| |
| // Decoding small images with very large scaling factors is a potential |
| // source of bugs and crashes. We disable these tests in Gold because |
| // tiny images are not very useful to look at. |
| // Here we make sure that we do not crash or access illegal memory when |
| // performing scaled decodes on small images. |
| test_dimensions(r, "1x1.png"); |
| test_dimensions(r, "2x2.png"); |
| test_dimensions(r, "3x3.png"); |
| test_dimensions(r, "3x1.png"); |
| test_dimensions(r, "1x1.png"); |
| test_dimensions(r, "16x1.png"); |
| test_dimensions(r, "1x16.png"); |
| test_dimensions(r, "mandrill_16.png"); |
| |
| } |
| |
| static void test_invalid(skiatest::Reporter* r, const char path[]) { |
| SkAutoTDelete<SkStream> stream(resource(path)); |
| if (!stream) { |
| SkDebugf("Missing resource '%s'\n", path); |
| return; |
| } |
| SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.detach())); |
| REPORTER_ASSERT(r, nullptr == codec); |
| } |
| |
| DEF_TEST(Codec_Empty, r) { |
| // Test images that should not be able to create a codec |
| test_invalid(r, "empty_images/zero-dims.gif"); |
| test_invalid(r, "empty_images/zero-embedded.ico"); |
| test_invalid(r, "empty_images/zero-width.bmp"); |
| test_invalid(r, "empty_images/zero-height.bmp"); |
| test_invalid(r, "empty_images/zero-width.jpg"); |
| test_invalid(r, "empty_images/zero-height.jpg"); |
| test_invalid(r, "empty_images/zero-width.png"); |
| test_invalid(r, "empty_images/zero-height.png"); |
| test_invalid(r, "empty_images/zero-width.wbmp"); |
| test_invalid(r, "empty_images/zero-height.wbmp"); |
| // This image is an ico with an embedded mask-bmp. This is illegal. |
| test_invalid(r, "invalid_images/mask-bmp-ico.ico"); |
| } |
| |
| static void test_invalid_parameters(skiatest::Reporter* r, const char path[]) { |
| SkAutoTDelete<SkStream> stream(resource(path)); |
| if (!stream) { |
| SkDebugf("Missing resource '%s'\n", path); |
| return; |
| } |
| SkAutoTDelete<SkScanlineDecoder> decoder(SkScanlineDecoder::NewFromStream( |
| stream.detach())); |
| |
| // This should return kSuccess because kIndex8 is supported. |
| SkPMColor colorStorage[256]; |
| int colorCount; |
| SkCodec::Result result = decoder->start( |
| decoder->getInfo().makeColorType(kIndex_8_SkColorType), nullptr, colorStorage, &colorCount); |
| REPORTER_ASSERT(r, SkCodec::kSuccess == result); |
| // The rest of the test is uninteresting if kIndex8 is not supported |
| if (SkCodec::kSuccess != result) { |
| return; |
| } |
| |
| // This should return kInvalidParameters because, in kIndex_8 mode, we must pass in a valid |
| // colorPtr and a valid colorCountPtr. |
| result = decoder->start( |
| decoder->getInfo().makeColorType(kIndex_8_SkColorType), nullptr, nullptr, nullptr); |
| REPORTER_ASSERT(r, SkCodec::kInvalidParameters == result); |
| result = decoder->start( |
| decoder->getInfo().makeColorType(kIndex_8_SkColorType)); |
| REPORTER_ASSERT(r, SkCodec::kInvalidParameters == result); |
| } |
| |
| DEF_TEST(Codec_Params, r) { |
| test_invalid_parameters(r, "index8.png"); |
| test_invalid_parameters(r, "mandrill.wbmp"); |
| } |
