| /* |
| * 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/SkAlphaType.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkColorSpace.h" |
| #include "include/core/SkRefCnt.h" |
| #include "modules/skcms/skcms.h" |
| #include "src/core/SkColorSpaceXformSteps.h" |
| #include "tests/Test.h" |
| |
| #include <cmath> |
| |
| 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); |
| } |
| } |