You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
71 lines
2.8 KiB
71 lines
2.8 KiB
/*
|
|
* Copyright 2018 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
#include "include/core/SkColorSpace.h"
|
|
#include "include/third_party/skcms/skcms.h"
|
|
#include "src/core/SkColorSpaceXformSteps.h"
|
|
#include "tests/Test.h"
|
|
|
|
DEF_TEST(SkColorSpaceXformSteps_vs_skcms, r) {
|
|
auto srgb = SkColorSpace::MakeSRGB();
|
|
auto dp3 = SkColorSpace::MakeRGB(SkNamedTransferFn::kSRGB, SkNamedGamut::kDisplayP3);
|
|
|
|
skcms_ICCProfile srgb_profile;
|
|
srgb->toProfile(&srgb_profile);
|
|
skcms_ICCProfile dp3_profile;
|
|
dp3->toProfile(&dp3_profile);
|
|
|
|
// These colors provide a good spread of interesting test cases.
|
|
SkColor colors[] = {
|
|
0xffff0000, 0x7fff0000, 0x7f7f0000,
|
|
0xff00ff00, 0x7f00ff00, 0x7f007f00,
|
|
};
|
|
|
|
for (auto color : colors) {
|
|
auto bgra = skcms_PixelFormat_BGRA_8888,
|
|
f32 = skcms_PixelFormat_RGBA_ffff;
|
|
auto unpremul = skcms_AlphaFormat_Unpremul,
|
|
premul = skcms_AlphaFormat_PremulAsEncoded;
|
|
|
|
float via_skcms[4];
|
|
skcms_Transform(&color, bgra, unpremul, &srgb_profile,
|
|
&via_skcms, f32, premul, &dp3_profile,
|
|
1);
|
|
|
|
SkColorSpaceXformSteps steps(srgb.get(), kUnpremul_SkAlphaType,
|
|
dp3.get(), kPremul_SkAlphaType);
|
|
float via_steps[4] = {
|
|
SkColorGetR(color) * (1 / 255.0f),
|
|
SkColorGetG(color) * (1 / 255.0f),
|
|
SkColorGetB(color) * (1 / 255.0f),
|
|
SkColorGetA(color) * (1 / 255.0f),
|
|
};
|
|
steps.apply(via_steps);
|
|
|
|
REPORTER_ASSERT(r, fabsf(via_skcms[0] - via_steps[0]) <= 0.005f);
|
|
REPORTER_ASSERT(r, fabsf(via_skcms[1] - via_steps[1]) <= 0.005f);
|
|
REPORTER_ASSERT(r, fabsf(via_skcms[2] - via_steps[2]) <= 0.005f);
|
|
REPORTER_ASSERT(r, fabsf(via_skcms[3] - via_steps[3]) <= 0.0f);
|
|
|
|
// Now go back using the other method's inverse transform
|
|
float steps_to_skcms[4];
|
|
skcms_Transform(via_steps, f32, premul, &dp3_profile,
|
|
steps_to_skcms, f32, premul, &srgb_profile,
|
|
1);
|
|
|
|
float skcms_to_steps[4] = { via_skcms[0], via_skcms[1], via_skcms[2], via_skcms[3] };
|
|
SkColorSpaceXformSteps inv_steps(dp3.get(), kPremul_SkAlphaType,
|
|
srgb.get(), kPremul_SkAlphaType);
|
|
inv_steps.apply(skcms_to_steps);
|
|
|
|
REPORTER_ASSERT(r, fabsf(skcms_to_steps[0] - steps_to_skcms[0]) <= 0.005f);
|
|
REPORTER_ASSERT(r, fabsf(skcms_to_steps[1] - steps_to_skcms[1]) <= 0.005f);
|
|
REPORTER_ASSERT(r, fabsf(skcms_to_steps[2] - steps_to_skcms[2]) <= 0.005f);
|
|
REPORTER_ASSERT(r, fabsf(skcms_to_steps[3] - steps_to_skcms[3]) <= 0.0f);
|
|
}
|
|
}
|