/* * Copyright 2017 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "tests/Test.h" #include "tools/Resources.h" #include "include/core/SkBitmap.h" #include "include/core/SkCanvas.h" #include "include/core/SkColorPriv.h" #include "include/core/SkEncodedImageFormat.h" #include "include/core/SkImage.h" #include "include/core/SkImageEncoder.h" #include "include/core/SkStream.h" #include "include/core/SkSurface.h" #include "include/encode/SkJpegEncoder.h" #include "include/encode/SkPngEncoder.h" #include "include/encode/SkWebpEncoder.h" #include "include/private/SkImageInfoPriv.h" #include #include #include #include // FIXME: Update the Google3 build's dependencies so it can run this test. #ifndef SK_BUILD_FOR_GOOGLE3 #include "webp/decode.h" #endif static bool encode(SkEncodedImageFormat format, SkWStream* dst, const SkPixmap& src) { switch (format) { case SkEncodedImageFormat::kJPEG: return SkJpegEncoder::Encode(dst, src, SkJpegEncoder::Options()); case SkEncodedImageFormat::kPNG: return SkPngEncoder::Encode(dst, src, SkPngEncoder::Options()); default: return false; } } static std::unique_ptr make(SkEncodedImageFormat format, SkWStream* dst, const SkPixmap& src) { switch (format) { case SkEncodedImageFormat::kJPEG: return SkJpegEncoder::Make(dst, src, SkJpegEncoder::Options()); case SkEncodedImageFormat::kPNG: return SkPngEncoder::Make(dst, src, SkPngEncoder::Options()); default: return nullptr; } } static void test_encode(skiatest::Reporter* r, SkEncodedImageFormat format) { SkBitmap bitmap; bool success = GetResourceAsBitmap("images/mandrill_128.png", &bitmap); if (!success) { return; } SkPixmap src; success = bitmap.peekPixels(&src); REPORTER_ASSERT(r, success); if (!success) { return; } SkDynamicMemoryWStream dst0, dst1, dst2, dst3; success = encode(format, &dst0, src); REPORTER_ASSERT(r, success); auto encoder1 = make(format, &dst1, src); for (int i = 0; i < src.height(); i++) { success = encoder1->encodeRows(1); REPORTER_ASSERT(r, success); } auto encoder2 = make(format, &dst2, src); for (int i = 0; i < src.height(); i+=3) { success = encoder2->encodeRows(3); REPORTER_ASSERT(r, success); } auto encoder3 = make(format, &dst3, src); success = encoder3->encodeRows(200); REPORTER_ASSERT(r, success); sk_sp data0 = dst0.detachAsData(); sk_sp data1 = dst1.detachAsData(); sk_sp data2 = dst2.detachAsData(); sk_sp data3 = dst3.detachAsData(); REPORTER_ASSERT(r, data0->equals(data1.get())); REPORTER_ASSERT(r, data0->equals(data2.get())); REPORTER_ASSERT(r, data0->equals(data3.get())); } DEF_TEST(Encode, r) { test_encode(r, SkEncodedImageFormat::kJPEG); test_encode(r, SkEncodedImageFormat::kPNG); } static inline bool almost_equals(SkPMColor a, SkPMColor b, int tolerance) { if (SkTAbs((int)SkGetPackedR32(a) - (int)SkGetPackedR32(b)) > tolerance) { return false; } if (SkTAbs((int)SkGetPackedG32(a) - (int)SkGetPackedG32(b)) > tolerance) { return false; } if (SkTAbs((int)SkGetPackedB32(a) - (int)SkGetPackedB32(b)) > tolerance) { return false; } if (SkTAbs((int)SkGetPackedA32(a) - (int)SkGetPackedA32(b)) > tolerance) { return false; } return true; } static inline bool almost_equals(const SkBitmap& a, const SkBitmap& b, int tolerance) { if (a.info() != b.info()) { return false; } SkASSERT(kN32_SkColorType == a.colorType()); for (int y = 0; y < a.height(); y++) { for (int x = 0; x < a.width(); x++) { if (!almost_equals(*a.getAddr32(x, y), *b.getAddr32(x, y), tolerance)) { return false; } } } return true; } DEF_TEST(Encode_JPG, r) { auto image = GetResourceAsImage("images/mandrill_128.png"); if (!image) { return; } for (auto ct : { kRGBA_8888_SkColorType, kBGRA_8888_SkColorType, kRGB_565_SkColorType, kARGB_4444_SkColorType, kGray_8_SkColorType, kRGBA_F16_SkColorType }) { for (auto at : { kPremul_SkAlphaType, kUnpremul_SkAlphaType, kOpaque_SkAlphaType }) { auto info = SkImageInfo::Make(image->width(), image->height(), ct, at); auto surface = SkSurface::MakeRaster(info); auto canvas = surface->getCanvas(); canvas->drawImage(image, 0, 0); SkBitmap bm; bm.allocPixels(info); if (!surface->makeImageSnapshot()->readPixels(nullptr, bm.pixmap(), 0, 0)) { ERRORF(r, "failed to readPixels! ct: %i\tat: %i\n", ct, at); continue; } for (auto alphaOption : { SkJpegEncoder::AlphaOption::kIgnore, SkJpegEncoder::AlphaOption::kBlendOnBlack }) { SkJpegEncoder::Options opts; opts.fAlphaOption = alphaOption; SkNullWStream ignored; if (!SkJpegEncoder::Encode(&ignored, bm.pixmap(), opts)) { REPORTER_ASSERT(r, ct == kARGB_4444_SkColorType && alphaOption == SkJpegEncoder::AlphaOption::kBlendOnBlack); } } } } } DEF_TEST(Encode_JpegDownsample, r) { SkBitmap bitmap; bool success = GetResourceAsBitmap("images/mandrill_128.png", &bitmap); if (!success) { return; } SkPixmap src; success = bitmap.peekPixels(&src); REPORTER_ASSERT(r, success); if (!success) { return; } SkDynamicMemoryWStream dst0, dst1, dst2; SkJpegEncoder::Options options; success = SkJpegEncoder::Encode(&dst0, src, options); REPORTER_ASSERT(r, success); options.fDownsample = SkJpegEncoder::Downsample::k422; success = SkJpegEncoder::Encode(&dst1, src, options); REPORTER_ASSERT(r, success); options.fDownsample = SkJpegEncoder::Downsample::k444; success = SkJpegEncoder::Encode(&dst2, src, options); REPORTER_ASSERT(r, success); sk_sp data0 = dst0.detachAsData(); sk_sp data1 = dst1.detachAsData(); sk_sp data2 = dst2.detachAsData(); REPORTER_ASSERT(r, data0->size() < data1->size()); REPORTER_ASSERT(r, data1->size() < data2->size()); SkBitmap bm0, bm1, bm2; SkImage::MakeFromEncoded(data0)->asLegacyBitmap(&bm0); SkImage::MakeFromEncoded(data1)->asLegacyBitmap(&bm1); SkImage::MakeFromEncoded(data2)->asLegacyBitmap(&bm2); REPORTER_ASSERT(r, almost_equals(bm0, bm1, 60)); REPORTER_ASSERT(r, almost_equals(bm1, bm2, 60)); } static inline void pushComment( std::vector& comments, const char* keyword, const char* text) { comments.push_back(keyword); comments.push_back(text); } static void testPngComments(const SkPixmap& src, SkPngEncoder::Options& options, skiatest::Reporter* r) { std::vector commentStrings; pushComment(commentStrings, "key", "text"); pushComment(commentStrings, "test", "something"); pushComment(commentStrings, "have some", "spaces in both"); std::string longKey(PNG_KEYWORD_MAX_LENGTH, 'x'); #ifdef SK_DEBUG commentStrings.push_back(longKey); #else // We call SkDEBUGFAILF it the key is too long so we'll only test this in release mode. commentStrings.push_back(longKey + "x"); #endif commentStrings.push_back(""); std::vector commentPointers; std::vector commentSizes; for(auto& str : commentStrings) { commentPointers.push_back(str.c_str()); commentSizes.push_back(str.length() + 1); } options.fComments = SkDataTable::MakeCopyArrays((void const *const *)commentPointers.data(), commentSizes.data(), commentStrings.size()); SkDynamicMemoryWStream dst; bool success = SkPngEncoder::Encode(&dst, src, options); REPORTER_ASSERT(r, success); std::vector output(dst.bytesWritten()); dst.copyTo(output.data()); // Each chunk is of the form length (4 bytes), chunk type (tEXt), data, // checksum (4 bytes). Make sure we find all of them in the encoded // results. const char kExpected1[] = "\x00\x00\x00\x08tEXtkey\x00text\x9e\xe7\x66\x51"; const char kExpected2[] = "\x00\x00\x00\x0etEXttest\x00something\x29\xba\xef\xac"; const char kExpected3[] = "\x00\x00\x00\x18tEXthave some\x00spaces in both\x8d\x69\x34\x2d"; std::string longKeyRecord = "tEXt" + longKey; // A snippet of our long key comment std::string tooLongRecord = "tExt" + longKey + "x"; // A snippet whose key is too long auto search1 = std::search(output.begin(), output.end(), kExpected1, kExpected1 + sizeof(kExpected1)); auto search2 = std::search(output.begin(), output.end(), kExpected2, kExpected2 + sizeof(kExpected2)); auto search3 = std::search(output.begin(), output.end(), kExpected3, kExpected3 + sizeof(kExpected3)); auto search4 = std::search(output.begin(), output.end(), longKeyRecord.begin(), longKeyRecord.end()); auto search5 = std::search(output.begin(), output.end(), tooLongRecord.begin(), tooLongRecord.end()); REPORTER_ASSERT(r, search1 != output.end()); REPORTER_ASSERT(r, search2 != output.end()); REPORTER_ASSERT(r, search3 != output.end()); REPORTER_ASSERT(r, search4 != output.end()); REPORTER_ASSERT(r, search5 == output.end()); // Comments test ends } DEF_TEST(Encode_PngOptions, r) { SkBitmap bitmap; bool success = GetResourceAsBitmap("images/mandrill_128.png", &bitmap); if (!success) { return; } SkPixmap src; success = bitmap.peekPixels(&src); REPORTER_ASSERT(r, success); if (!success) { return; } SkDynamicMemoryWStream dst0, dst1, dst2; SkPngEncoder::Options options; success = SkPngEncoder::Encode(&dst0, src, options); REPORTER_ASSERT(r, success); options.fFilterFlags = SkPngEncoder::FilterFlag::kUp; success = SkPngEncoder::Encode(&dst1, src, options); REPORTER_ASSERT(r, success); options.fZLibLevel = 3; success = SkPngEncoder::Encode(&dst2, src, options); REPORTER_ASSERT(r, success); testPngComments(src, options, r); sk_sp data0 = dst0.detachAsData(); sk_sp data1 = dst1.detachAsData(); sk_sp data2 = dst2.detachAsData(); REPORTER_ASSERT(r, data0->size() < data1->size()); REPORTER_ASSERT(r, data1->size() < data2->size()); SkBitmap bm0, bm1, bm2; SkImage::MakeFromEncoded(data0)->asLegacyBitmap(&bm0); SkImage::MakeFromEncoded(data1)->asLegacyBitmap(&bm1); SkImage::MakeFromEncoded(data2)->asLegacyBitmap(&bm2); REPORTER_ASSERT(r, almost_equals(bm0, bm1, 0)); REPORTER_ASSERT(r, almost_equals(bm0, bm2, 0)); } #ifndef SK_BUILD_FOR_GOOGLE3 DEF_TEST(Encode_WebpQuality, r) { SkBitmap bm; bm.allocN32Pixels(100, 100); bm.eraseColor(SK_ColorBLUE); auto dataLossy = SkEncodeBitmap(bm, SkEncodedImageFormat::kWEBP, 99); auto dataLossLess = SkEncodeBitmap(bm, SkEncodedImageFormat::kWEBP, 100); enum Format { kMixed = 0, kLossy = 1, kLossless = 2, }; auto test = [&r](const sk_sp& data, Format expected) { auto printFormat = [](int f) { switch (f) { case kMixed: return "mixed"; case kLossy: return "lossy"; case kLossless: return "lossless"; default: return "unknown"; } }; if (!data) { ERRORF(r, "Failed to encode. Expected %s", printFormat(expected)); return; } WebPBitstreamFeatures features; auto status = WebPGetFeatures(data->bytes(), data->size(), &features); if (status != VP8_STATUS_OK) { ERRORF(r, "Encode had an error %i. Expected %s", status, printFormat(expected)); return; } if (expected != features.format) { ERRORF(r, "Expected %s encode, but got format %s", printFormat(expected), printFormat(features.format)); } }; test(dataLossy, kLossy); test(dataLossLess, kLossless); } #endif DEF_TEST(Encode_WebpOptions, r) { SkBitmap bitmap; bool success = GetResourceAsBitmap("images/google_chrome.ico", &bitmap); if (!success) { return; } SkPixmap src; success = bitmap.peekPixels(&src); REPORTER_ASSERT(r, success); if (!success) { return; } SkDynamicMemoryWStream dst0, dst1, dst2, dst3; SkWebpEncoder::Options options; options.fCompression = SkWebpEncoder::Compression::kLossless; options.fQuality = 0.0f; success = SkWebpEncoder::Encode(&dst0, src, options); REPORTER_ASSERT(r, success); options.fQuality = 100.0f; success = SkWebpEncoder::Encode(&dst1, src, options); REPORTER_ASSERT(r, success); options.fCompression = SkWebpEncoder::Compression::kLossy; options.fQuality = 100.0f; success = SkWebpEncoder::Encode(&dst2, src, options); REPORTER_ASSERT(r, success); options.fCompression = SkWebpEncoder::Compression::kLossy; options.fQuality = 50.0f; success = SkWebpEncoder::Encode(&dst3, src, options); REPORTER_ASSERT(r, success); sk_sp data0 = dst0.detachAsData(); sk_sp data1 = dst1.detachAsData(); sk_sp data2 = dst2.detachAsData(); sk_sp data3 = dst3.detachAsData(); REPORTER_ASSERT(r, data0->size() > data1->size()); REPORTER_ASSERT(r, data1->size() > data2->size()); REPORTER_ASSERT(r, data2->size() > data3->size()); SkBitmap bm0, bm1, bm2, bm3; SkImage::MakeFromEncoded(data0)->asLegacyBitmap(&bm0); SkImage::MakeFromEncoded(data1)->asLegacyBitmap(&bm1); SkImage::MakeFromEncoded(data2)->asLegacyBitmap(&bm2); SkImage::MakeFromEncoded(data3)->asLegacyBitmap(&bm3); REPORTER_ASSERT(r, almost_equals(bm0, bm1, 0)); REPORTER_ASSERT(r, almost_equals(bm0, bm2, 90)); REPORTER_ASSERT(r, almost_equals(bm2, bm3, 50)); } DEF_TEST(Encode_Alpha, r) { // These formats have no sensible way to encode alpha images. for (auto format : { SkEncodedImageFormat::kJPEG, SkEncodedImageFormat::kPNG, SkEncodedImageFormat::kWEBP }) { for (int ctAsInt = kUnknown_SkColorType + 1; ctAsInt <= kLastEnum_SkColorType; ctAsInt++) { auto ct = static_cast(ctAsInt); // Non-alpha-only colortypes are tested elsewhere. if (!SkColorTypeIsAlphaOnly(ct)) continue; SkBitmap bm; bm.allocPixels(SkImageInfo::Make(10, 10, ct, kPremul_SkAlphaType)); sk_bzero(bm.getPixels(), bm.computeByteSize()); auto data = SkEncodeBitmap(bm, format, 100); if (format == SkEncodedImageFormat::kPNG && ct == kAlpha_8_SkColorType) { // We support encoding alpha8 to png with our own private meaning. REPORTER_ASSERT(r, data != nullptr); } else { REPORTER_ASSERT(r, data == nullptr); } } } }