/* * Copyright 2017 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "../src/jumper/SkJumper.h" #include "SkColorSpace_New.h" #include "SkRasterPipeline.h" #include "Test.h" #include DEF_TEST(SkColorSpace_New_TransferFnBasics, r) { auto gamut = SkMatrix44::I(); auto blending = SkColorSpace_New::Blending::AsEncoded; SkColorSpace_New linearA{SkColorSpace_New::TransferFn::MakeLinear(), gamut, blending}, linearB{SkColorSpace_New::TransferFn::MakeGamma(1), gamut, blending}, srgb{SkColorSpace_New::TransferFn::MakeSRGB(), gamut, blending}, gamma{SkColorSpace_New::TransferFn::MakeGamma(2.2f), gamut, blending}; REPORTER_ASSERT(r, linearA.gammaIsLinear()); REPORTER_ASSERT(r, linearB.gammaIsLinear()); REPORTER_ASSERT(r, ! srgb.gammaIsLinear()); REPORTER_ASSERT(r, ! gamma.gammaIsLinear()); REPORTER_ASSERT(r, !linearA.gammaCloseToSRGB()); REPORTER_ASSERT(r, !linearB.gammaCloseToSRGB()); REPORTER_ASSERT(r, srgb.gammaCloseToSRGB()); REPORTER_ASSERT(r, ! gamma.gammaCloseToSRGB()); REPORTER_ASSERT(r, linearA.transferFn().equals(linearB.transferFn())); REPORTER_ASSERT(r, !linearA.transferFn().equals( srgb.transferFn())); REPORTER_ASSERT(r, !linearA.transferFn().equals( gamma.transferFn())); REPORTER_ASSERT(r, !linearB.transferFn().equals( srgb.transferFn())); REPORTER_ASSERT(r, !linearB.transferFn().equals( gamma.transferFn())); REPORTER_ASSERT(r, ! srgb.transferFn().equals( gamma.transferFn())); } DEF_TEST(SkColorSpace_New_TransferFnStages, r) { // We'll create a little SkRasterPipelineBlitter-like scenario, // blending the same src color over the same dst color, but with // three different transfer functions, for simplicity the same for src and dst. SkColor src = 0x7f7f0000; SkColor dsts[3]; for (SkColor& dst : dsts) { dst = 0xff007f00; } auto gamut = SkMatrix44::I(); auto blending = SkColorSpace_New::Blending::Linear; SkColorSpace_New linear{SkColorSpace_New::TransferFn::MakeLinear(), gamut, blending}, srgb{SkColorSpace_New::TransferFn::MakeSRGB(), gamut, blending}, gamma{SkColorSpace_New::TransferFn::MakeGamma(3), gamut, blending}; SkColor* dst = dsts; for (const SkColorSpace_New* cs : {&linear, &srgb, &gamma}) { SkJumper_MemoryCtx src_ctx = { &src, 0 }, dst_ctx = { dst++, 0 }; SkRasterPipeline_<256> p; p.append(SkRasterPipeline::load_8888, &src_ctx); cs->transferFn().linearizeSrc(&p); p.append(SkRasterPipeline::premul); p.append(SkRasterPipeline::load_8888_dst, &dst_ctx); cs->transferFn().linearizeDst(&p); p.append(SkRasterPipeline::premul_dst); p.append(SkRasterPipeline::srcover); p.append(SkRasterPipeline::unpremul); cs->transferFn().encodeSrc(&p); p.append(SkRasterPipeline::store_8888, &dst_ctx); p.run(0,0,1,1); } // Double check the uninteresting channels: alpha's opaque, no blue. REPORTER_ASSERT(r, SkColorGetA(dsts[0]) == 0xff && SkColorGetB(dsts[0]) == 0x00); REPORTER_ASSERT(r, SkColorGetA(dsts[1]) == 0xff && SkColorGetB(dsts[1]) == 0x00); REPORTER_ASSERT(r, SkColorGetA(dsts[2]) == 0xff && SkColorGetB(dsts[2]) == 0x00); // Because we're doing linear blending, a more-exponential transfer function will // brighten the encoded values more when linearizing. So we expect to see that // linear is darker than sRGB, and sRGB in turn is darker than gamma 3. REPORTER_ASSERT(r, SkColorGetR(dsts[0]) < SkColorGetR(dsts[1])); REPORTER_ASSERT(r, SkColorGetR(dsts[1]) < SkColorGetR(dsts[2])); REPORTER_ASSERT(r, SkColorGetG(dsts[0]) < SkColorGetG(dsts[1])); REPORTER_ASSERT(r, SkColorGetG(dsts[1]) < SkColorGetG(dsts[2])); }