| /* |
| * Copyright 2019 Google LLC. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm/gm.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkImageInfo.h" |
| #include "include/core/SkMatrix.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkTileMode.h" |
| #include "include/core/SkTypes.h" |
| #include "src/core/SkCanvasPriv.h" |
| #include "src/gpu/GrCaps.h" |
| #include "src/gpu/GrDirectContextPriv.h" |
| #include "src/gpu/GrFragmentProcessor.h" |
| #include "src/gpu/SkGr.h" |
| #include "src/gpu/SurfaceFillContext.h" |
| #include "src/gpu/effects/GrRRectEffect.h" |
| #include "src/gpu/effects/GrSkSLFP.h" |
| #include "src/gpu/effects/GrTextureEffect.h" |
| #include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h" |
| #include "tools/Resources.h" |
| #include "tools/ToolUtils.h" |
| |
| class SampleCoordEffect : public GrFragmentProcessor { |
| public: |
| static constexpr GrProcessor::ClassID CLASS_ID = (GrProcessor::ClassID) 0; |
| |
| SampleCoordEffect(std::unique_ptr<GrFragmentProcessor> child) |
| : INHERITED(CLASS_ID, kNone_OptimizationFlags) { |
| this->registerChild(std::move(child), SkSL::SampleUsage::Explicit()); |
| } |
| |
| const char* name() const override { return "SampleCoordEffect"; } |
| |
| std::unique_ptr<GrFragmentProcessor> clone() const override { |
| SkASSERT(false); |
| return nullptr; |
| } |
| |
| void onAddToKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override {} |
| |
| bool onIsEqual(const GrFragmentProcessor&) const override { |
| SkASSERT(false); |
| return true; |
| } |
| |
| private: |
| std::unique_ptr<GrGLSLFragmentProcessor> onMakeProgramImpl() const override; |
| using INHERITED = GrFragmentProcessor; |
| }; |
| |
| class GLSLSampleCoordEffect : public GrGLSLFragmentProcessor { |
| void emitCode(EmitArgs& args) override { |
| GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; |
| SkString sample1 = this->invokeChild(0, args, "float2(sk_FragCoord.x, sk_FragCoord.y)"); |
| SkString sample2 = this->invokeChild(0, args, "float2(sk_FragCoord.x, 512-sk_FragCoord.y)"); |
| fragBuilder->codeAppendf("return (%s + %s) / 2;\n", sample1.c_str(), sample2.c_str()); |
| } |
| }; |
| |
| std::unique_ptr<GrGLSLFragmentProcessor> SampleCoordEffect::onMakeProgramImpl() const { |
| return std::make_unique<GLSLSampleCoordEffect>(); |
| } |
| |
| DEF_SIMPLE_GPU_GM_BG(fpcoordinateoverride, rContext, canvas, 512, 512, |
| ToolUtils::color_to_565(0xFF66AA99)) { |
| |
| auto sfc = SkCanvasPriv::TopDeviceSurfaceFillContext(canvas); |
| if (!sfc) { |
| return; |
| } |
| |
| SkBitmap bmp; |
| GetResourceAsBitmap("images/mandrill_512_q075.jpg", &bmp); |
| auto view = std::get<0>(GrMakeCachedBitmapProxyView(rContext, bmp, GrMipmapped::kNo)); |
| if (!view) { |
| return; |
| } |
| std::unique_ptr<GrFragmentProcessor> imgFP = |
| GrTextureEffect::Make(std::move(view), bmp.alphaType(), SkMatrix()); |
| auto fp = std::unique_ptr<GrFragmentProcessor>(new SampleCoordEffect(std::move(imgFP))); |
| |
| sfc->fillWithFP(std::move(fp)); |
| } |