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