| /* |
| * Copyright 2018 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| in half4x4 gradientMatrix; |
| |
| @coordTransform { |
| gradientMatrix |
| } |
| |
| void main() { |
| half t = half(sk_TransformedCoords2D[0].x); |
| sk_OutColor = half4(t, 1, 0, 0); // y = 1 for always valid |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| @header { |
| #include "SkLinearGradient.h" |
| #include "GrGradientShader.h" |
| } |
| |
| // The linear gradient never rejects a pixel so it doesn't change opacity |
| @optimizationFlags { |
| kPreservesOpaqueInput_OptimizationFlag |
| } |
| |
| @make { |
| static std::unique_ptr<GrFragmentProcessor> Make(const SkLinearGradient& gradient, |
| const GrFPArgs& args); |
| } |
| |
| @cppEnd { |
| std::unique_ptr<GrFragmentProcessor> GrLinearGradientLayout::Make( |
| const SkLinearGradient& grad, const GrFPArgs& args) { |
| SkMatrix matrix; |
| if (!grad.totalLocalMatrix(args.fPreLocalMatrix, args.fPostLocalMatrix)->invert(&matrix)) { |
| return nullptr; |
| } |
| matrix.postConcat(grad.getGradientMatrix()); |
| return std::unique_ptr<GrFragmentProcessor>(new GrLinearGradientLayout(matrix)); |
| } |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| @test(d) { |
| SkScalar scale = GrGradientShader::RandomParams::kGradientScale; |
| SkPoint points[] = {{d->fRandom->nextRangeScalar(0.0f, scale), |
| d->fRandom->nextRangeScalar(0.0f, scale)}, |
| {d->fRandom->nextRangeScalar(0.0f, scale), |
| d->fRandom->nextRangeScalar(0.0f, scale)}}; |
| |
| GrGradientShader::RandomParams params(d->fRandom); |
| auto shader = params.fUseColors4f ? |
| SkGradientShader::MakeLinear(points, params.fColors4f, params.fColorSpace, params.fStops, |
| params.fColorCount, params.fTileMode) : |
| SkGradientShader::MakeLinear(points, params.fColors, params.fStops, |
| params.fColorCount, params.fTileMode); |
| GrTest::TestAsFPArgs asFPArgs(d); |
| std::unique_ptr<GrFragmentProcessor> fp = as_SB(shader)->asFragmentProcessor(asFPArgs.args()); |
| GrAlwaysAssert(fp); |
| return fp; |
| } |