| /* |
| * Copyright 2018 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| half4 main(float2 coord) { |
| return half4(half(length(coord)), 1, 0, 0); // y = 1 for always valid |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| @header { |
| #include "src/gpu/effects/GrMatrixEffect.h" |
| #include "src/gpu/gradients/GrGradientShader.h" |
| #include "src/shaders/gradients/SkRadialGradient.h" |
| } |
| |
| // The radial gradient never rejects a pixel so it doesn't change opacity |
| @optimizationFlags { |
| kPreservesOpaqueInput_OptimizationFlag |
| } |
| |
| @make { |
| static std::unique_ptr<GrFragmentProcessor> Make(const SkRadialGradient& gradient, |
| const GrFPArgs& args); |
| } |
| |
| @cppEnd { |
| std::unique_ptr<GrFragmentProcessor> GrRadialGradientLayout::Make( |
| const SkRadialGradient& grad, const GrFPArgs& args) { |
| SkMatrix matrix; |
| if (!grad.totalLocalMatrix(args.fPreLocalMatrix)->invert(&matrix)) { |
| return nullptr; |
| } |
| matrix.postConcat(grad.getGradientMatrix()); |
| return GrMatrixEffect::Make( |
| matrix, std::unique_ptr<GrFragmentProcessor>(new GrRadialGradientLayout())); |
| } |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| @test(d) { |
| SkScalar scale = GrGradientShader::RandomParams::kGradientScale; |
| std::unique_ptr<GrFragmentProcessor> fp; |
| GrTest::TestAsFPArgs asFPArgs(d); |
| do { |
| GrGradientShader::RandomParams params(d->fRandom); |
| SkPoint center; |
| center.fX = d->fRandom->nextRangeScalar(0.0f, scale); |
| center.fY = d->fRandom->nextRangeScalar(0.0f, scale); |
| SkScalar radius = d->fRandom->nextRangeScalar(0.0f, scale); |
| sk_sp<SkShader> shader = params.fUseColors4f |
| ? SkGradientShader::MakeRadial(center, radius, params.fColors4f, |
| params.fColorSpace, params.fStops, |
| params.fColorCount, params.fTileMode) |
| : SkGradientShader::MakeRadial(center, radius, params.fColors, |
| params.fStops, params.fColorCount, |
| params.fTileMode); |
| // Degenerate params can create an Empty (non-null) shader, where fp will be nullptr |
| fp = shader ? as_SB(shader)->asFragmentProcessor(asFPArgs.args()) : nullptr; |
| } while (!fp); |
| return fp; |
| } |