1 /* 2 * Copyright 2018 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "../third_party/skcms/skcms.h" 9 #include "SkColorSpace.h" 10 #include "SkColorSpaceXformSteps.h" 11 #include "Test.h" 12 13 DEF_TEST(SkColorSpaceXformSteps_vs_skcms, r) { 14 auto srgb = SkColorSpace::MakeSRGB(); 15 auto dp3 = SkColorSpace::MakeRGB(SkNamedTransferFn::kSRGB, SkNamedGamut::kDCIP3); 16 17 skcms_ICCProfile srgb_profile; 18 srgb->toProfile(&srgb_profile); 19 skcms_ICCProfile dp3_profile; 20 dp3->toProfile(&dp3_profile); 21 22 // These colors provide a good spread of interesting test cases. 23 SkColor colors[] = { 24 0xffff0000, 0x7fff0000, 0x7f7f0000, 25 0xff00ff00, 0x7f00ff00, 0x7f007f00, 26 }; 27 28 for (auto color : colors) { 29 auto bgra = skcms_PixelFormat_BGRA_8888, 30 f32 = skcms_PixelFormat_RGBA_ffff; 31 auto unpremul = skcms_AlphaFormat_Unpremul, 32 premul = skcms_AlphaFormat_PremulAsEncoded; 33 34 float via_skcms[4]; 35 skcms_Transform(&color, bgra, unpremul, &srgb_profile, 36 &via_skcms, f32, premul, &dp3_profile, 37 1); 38 39 SkColorSpaceXformSteps steps(srgb.get(), kUnpremul_SkAlphaType, 40 dp3.get(), kPremul_SkAlphaType); 41 float via_steps[4] = { 42 SkColorGetR(color) * (1 / 255.0f), 43 SkColorGetG(color) * (1 / 255.0f), 44 SkColorGetB(color) * (1 / 255.0f), 45 SkColorGetA(color) * (1 / 255.0f), 46 }; 47 steps.apply(via_steps); 48 49 REPORTER_ASSERT(r, fabsf(via_skcms[0] - via_steps[0]) <= 0.005f); 50 REPORTER_ASSERT(r, fabsf(via_skcms[1] - via_steps[1]) <= 0.005f); 51 REPORTER_ASSERT(r, fabsf(via_skcms[2] - via_steps[2]) <= 0.005f); 52 REPORTER_ASSERT(r, fabsf(via_skcms[3] - via_steps[3]) <= 0.0f); 53 54 // Now go back using the other method's inverse transform 55 float steps_to_skcms[4]; 56 skcms_Transform(via_steps, f32, premul, &dp3_profile, 57 steps_to_skcms, f32, premul, &srgb_profile, 58 1); 59 60 float skcms_to_steps[4] = { via_skcms[0], via_skcms[1], via_skcms[2], via_skcms[3] }; 61 SkColorSpaceXformSteps inv_steps(dp3.get(), kPremul_SkAlphaType, 62 srgb.get(), kPremul_SkAlphaType); 63 inv_steps.apply(skcms_to_steps); 64 65 REPORTER_ASSERT(r, fabsf(skcms_to_steps[0] - steps_to_skcms[0]) <= 0.005f); 66 REPORTER_ASSERT(r, fabsf(skcms_to_steps[1] - steps_to_skcms[1]) <= 0.005f); 67 REPORTER_ASSERT(r, fabsf(skcms_to_steps[2] - steps_to_skcms[2]) <= 0.005f); 68 REPORTER_ASSERT(r, fabsf(skcms_to_steps[3] - steps_to_skcms[3]) <= 0.0f); 69 } 70 } 71
