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/*
* Copyright 2016 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 "SkCodec.h"
#include "SkColorSpace.h"
#include "Test.h"
#include "png.h"
static bool almost_equal(float a, float b) {
return SkTAbs(a - b) < 0.001f;
}
static void test_space(skiatest::Reporter* r, SkColorSpace* space,
const float red[], const float green[], const float blue[],
const float expectedGammas[]) {
#ifdef SK_DEBUG
const SkColorSpace::SkGammas& gammas = space->gammas();
REPORTER_ASSERT(r, almost_equal(expectedGammas[0], gammas.red()));
REPORTER_ASSERT(r, almost_equal(expectedGammas[1], gammas.green()));
REPORTER_ASSERT(r, almost_equal(expectedGammas[2], gammas.blue()));
#endif
SkMatrix44 mat = space->xyz();
const float src[] = {
1, 0, 0, 1,
0, 1, 0, 1,
0, 0, 1, 1,
};
float dst[4];
for (int i = 0; i < 3; ++i) {
mat.mapScalars(&src[i*4], dst);
REPORTER_ASSERT(r, almost_equal(red[i], dst[0]));
REPORTER_ASSERT(r, almost_equal(green[i], dst[1]));
REPORTER_ASSERT(r, almost_equal(blue[i], dst[2]));
}
}
const float g_sRGB_XYZ[] = { 0.4358f, 0.2224f, 0.0139f, // R
0.3853f, 0.7170f, 0.0971f, // G
0.1430f, 0.0606f, 0.7139f }; // B
DEF_TEST(ColorSpace_sRGB, r) {
const float srgb_gamma[] = { 2.2f, 2.2f, 2.2f };
test_space(r, SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named).get(),
g_sRGB_XYZ, &g_sRGB_XYZ[3], &g_sRGB_XYZ[6], srgb_gamma);
}
static SkStreamAsset* resource(const char path[]) {
SkString fullPath = GetResourcePath(path);
return SkStream::NewFromFile(fullPath.c_str());
}
DEF_TEST(ColorSpaceParsePngICCProfile, r) {
SkAutoTDelete<SkStream> stream(resource("color_wheel_with_profile.png"));
REPORTER_ASSERT(r, nullptr != stream);
if (!stream) {
return;
}
SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.release()));
REPORTER_ASSERT(r, nullptr != codec);
#if (PNG_LIBPNG_VER_MAJOR > 1) || (PNG_LIBPNG_VER_MAJOR == 1 && PNG_LIBPNG_VER_MINOR >= 6)
SkColorSpace* colorSpace = codec->getColorSpace();
REPORTER_ASSERT(r, nullptr != colorSpace);
const float red[] = { 0.436066f, 0.222488f, 0.013916f };
const float green[] = { 0.385147f, 0.716873f, 0.0970764f };
const float blue[] = { 0.143066f, 0.0606079f, 0.714096f };
const float gamma[] = { 2.2f, 2.2f, 2.2f };
test_space(r, colorSpace, red, green, blue, gamma);
#endif
}
DEF_TEST(ColorSpaceParseJpegICCProfile, r) {
SkAutoTDelete<SkStream> stream(resource("icc-v2-gbr.jpg"));
REPORTER_ASSERT(r, nullptr != stream);
if (!stream) {
return;
}
SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.release()));
REPORTER_ASSERT(r, nullptr != codec);
if (!codec) {
return;
}
SkColorSpace* colorSpace = codec->getColorSpace();
REPORTER_ASSERT(r, nullptr != colorSpace);
const float red[] = { 0.385117f, 0.716904f, 0.0970612f };
const float green[] = { 0.143051f, 0.0606079f, 0.713913f };
const float blue[] = { 0.436035f, 0.222488f, 0.013916f };
const float gamma[] = { 2.2f, 2.2f, 2.2f };
test_space(r, colorSpace, red, green, blue, gamma);
}
DEF_TEST(ColorSpaceSRGBCompare, r) {
// Create an sRGB color space by name
sk_sp<SkColorSpace> namedColorSpace = SkColorSpace::NewNamed(SkColorSpace::kSRGB_Named);
// Create an sRGB color space by value
SkMatrix44 srgbToxyzD50(SkMatrix44::kUninitialized_Constructor);
srgbToxyzD50.set3x3ColMajorf(g_sRGB_XYZ);
sk_sp<SkColorSpace> rgbColorSpace = SkColorSpace::NewRGB(
SkColorSpace::SkGammas(2.2f, 2.2f, 2.2f), srgbToxyzD50);
REPORTER_ASSERT(r, namedColorSpace == namedColorSpace);
// Change a single value from the sRGB matrix
srgbToxyzD50.set(2, 2, 0.5f);
sk_sp<SkColorSpace> strangeColorSpace = SkColorSpace::NewRGB(
SkColorSpace::SkGammas(2.2f, 2.2f, 2.2f), srgbToxyzD50);
REPORTER_ASSERT(r, strangeColorSpace != namedColorSpace);
}
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