a2ffa98323
Reason for revert: Breaks TSAN https://build.chromium.org/p/client.skia/builders/Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-TSAN/builds/6387/steps/dm/logs/stdio Original issue's description: > Introduce SkGammas type to represent ICC gamma curves > > BUG=skia: > GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1928123002 > > Committed: https://skia.googlesource.com/skia/+/7b2c6dd8c918209cb92e1338905d511c68da3eb2 TBR=scroggo@google.com,reed@google.com,brianosman@google.com # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=skia: Review-Url: https://codereview.chromium.org/1933863002
97 lines
3.7 KiB
C++
97 lines
3.7 KiB
C++
/*
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* Copyright 2016 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 "Resources.h"
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#include "SkCodec.h"
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#include "SkColorSpace.h"
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#include "Test.h"
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#include "png.h"
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static SkStreamAsset* resource(const char path[]) {
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SkString fullPath = GetResourcePath(path);
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return SkStream::NewFromFile(fullPath.c_str());
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}
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static bool almost_equal(float a, float b) {
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return SkTAbs(a - b) < 0.001f;
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}
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DEF_TEST(ColorSpaceParsePngICCProfile, r) {
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SkAutoTDelete<SkStream> stream(resource("color_wheel_with_profile.png"));
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REPORTER_ASSERT(r, nullptr != stream);
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if (!stream) {
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return;
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}
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SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.release()));
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REPORTER_ASSERT(r, nullptr != codec);
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#if (PNG_LIBPNG_VER_MAJOR > 1) || (PNG_LIBPNG_VER_MAJOR == 1 && PNG_LIBPNG_VER_MINOR >= 6)
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SkColorSpace* colorSpace = codec->getColorSpace();
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REPORTER_ASSERT(r, nullptr != colorSpace);
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// No need to use almost equal here. The color profile that we have extracted
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// actually has a table of gammas. And our current implementation guesses 2.2f.
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SkFloat3 gammas = colorSpace->gamma();
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REPORTER_ASSERT(r, 2.2f == gammas.fVec[0]);
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REPORTER_ASSERT(r, 2.2f == gammas.fVec[1]);
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REPORTER_ASSERT(r, 2.2f == gammas.fVec[2]);
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// These nine values were extracted from the color profile in isolation (before
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// we embedded it in the png). Here we check that we still extract the same values.
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SkFloat3x3 xyz = colorSpace->xyz();
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REPORTER_ASSERT(r, almost_equal(0.436066f, xyz.fMat[0]));
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REPORTER_ASSERT(r, almost_equal(0.222488f, xyz.fMat[1]));
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REPORTER_ASSERT(r, almost_equal(0.013916f, xyz.fMat[2]));
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REPORTER_ASSERT(r, almost_equal(0.385147f, xyz.fMat[3]));
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REPORTER_ASSERT(r, almost_equal(0.716873f, xyz.fMat[4]));
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REPORTER_ASSERT(r, almost_equal(0.0970764f, xyz.fMat[5]));
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REPORTER_ASSERT(r, almost_equal(0.143066f, xyz.fMat[6]));
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REPORTER_ASSERT(r, almost_equal(0.0606079f, xyz.fMat[7]));
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REPORTER_ASSERT(r, almost_equal(0.714096f, xyz.fMat[8]));
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#endif
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}
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DEF_TEST(ColorSpaceParseJpegICCProfile, r) {
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SkAutoTDelete<SkStream> stream(resource("icc-v2-gbr.jpg"));
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REPORTER_ASSERT(r, nullptr != stream);
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if (!stream) {
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return;
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}
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SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.release()));
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REPORTER_ASSERT(r, nullptr != codec);
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if (!codec) {
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return;
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}
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SkColorSpace* colorSpace = codec->getColorSpace();
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REPORTER_ASSERT(r, nullptr != colorSpace);
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// It's important to use almost equal here. This profile sets gamma as
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// 563 / 256, which actually comes out to about 2.19922.
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SkFloat3 gammas = colorSpace->gamma();
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REPORTER_ASSERT(r, almost_equal(2.2f, gammas.fVec[0]));
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REPORTER_ASSERT(r, almost_equal(2.2f, gammas.fVec[1]));
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REPORTER_ASSERT(r, almost_equal(2.2f, gammas.fVec[2]));
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// These nine values were extracted from the color profile. Until we know any
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// better, we'll assume these are the right values and test that we continue
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// to extract them properly.
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SkFloat3x3 xyz = colorSpace->xyz();
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REPORTER_ASSERT(r, almost_equal(0.385117f, xyz.fMat[0]));
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REPORTER_ASSERT(r, almost_equal(0.716904f, xyz.fMat[1]));
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REPORTER_ASSERT(r, almost_equal(0.0970612f, xyz.fMat[2]));
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REPORTER_ASSERT(r, almost_equal(0.143051f, xyz.fMat[3]));
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REPORTER_ASSERT(r, almost_equal(0.0606079f, xyz.fMat[4]));
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REPORTER_ASSERT(r, almost_equal(0.713913f, xyz.fMat[5]));
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REPORTER_ASSERT(r, almost_equal(0.436035f, xyz.fMat[6]));
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REPORTER_ASSERT(r, almost_equal(0.222488f, xyz.fMat[7]));
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REPORTER_ASSERT(r, almost_equal(0.013916f, xyz.fMat[8]));
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}
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