a069304560
Change-Id: I3fccadd8a2860dbee73f93f995738146373f8a39 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/326196 Commit-Queue: Adlai Holler <adlai@google.com> Auto-Submit: Adlai Holler <adlai@google.com> Reviewed-by: Robert Phillips <robertphillips@google.com>
106 lines
4.3 KiB
C++
106 lines
4.3 KiB
C++
/*
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* Copyright 2019 Google LLC.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm/gm.h"
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#include "include/effects/SkGradientShader.h"
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#include "src/core/SkMatrixProvider.h"
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#include "src/gpu/GrBitmapTextureMaker.h"
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#include "src/gpu/GrDirectContextPriv.h"
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#include "src/gpu/GrRenderTargetContextPriv.h"
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#include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h"
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#include "src/gpu/ops/GrFillRectOp.h"
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#include "tools/Resources.h"
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class SampleMatrixVariableEffect : public GrFragmentProcessor {
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public:
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static constexpr GrProcessor::ClassID CLASS_ID = (GrProcessor::ClassID) 2;
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SampleMatrixVariableEffect(std::unique_ptr<GrFragmentProcessor> child,
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float xOffset,
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float yOffset)
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: INHERITED(CLASS_ID, kNone_OptimizationFlags)
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, fXOffset(xOffset)
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, fYOffset(yOffset) {
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this->registerChild(std::move(child), SkSL::SampleUsage::VariableMatrix());
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}
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const char* name() const override { return "SampleMatrixVariableEffect"; }
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std::unique_ptr<GrFragmentProcessor> clone() const override {
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SkASSERT(false);
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return nullptr;
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}
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void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override {}
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bool onIsEqual(const GrFragmentProcessor& that) const override { return this == &that; }
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private:
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GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
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float fXOffset;
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float fYOffset;
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using INHERITED = GrFragmentProcessor;
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friend class GLSLSampleMatrixVariableEffect;
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};
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class GLSLSampleMatrixVariableEffect : public GrGLSLFragmentProcessor {
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void emitCode(EmitArgs& args) override {
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auto& smve = args.fFp.cast<SampleMatrixVariableEffect>();
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GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
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SkString sample1 = this->invokeChildWithMatrix(0, args, "float3x3(1)");
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SkString sample2 = this->invokeChildWithMatrix(0, args,
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SkStringPrintf("float3x3(1, -1, 0, 1, 0, 0, "
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"%g, %g, 1)",
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smve.fXOffset,
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smve.fYOffset).c_str());
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fragBuilder->codeAppendf("%s = (%s + %s) / 2;\n", args.fOutputColor, sample1.c_str(),
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sample2.c_str());
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}
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};
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GrGLSLFragmentProcessor* SampleMatrixVariableEffect::onCreateGLSLInstance() const {
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return new GLSLSampleMatrixVariableEffect();
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}
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DEF_SIMPLE_GPU_GM(sample_matrix_variable, ctx, rtCtx, canvas, 512, 256) {
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auto draw = [rtCtx](std::unique_ptr<GrFragmentProcessor> baseFP, float ofsX, float ofsY,
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int tx, int ty) {
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auto fp = std::unique_ptr<GrFragmentProcessor>(
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new SampleMatrixVariableEffect(std::move(baseFP), ofsX, ofsY));
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GrPaint paint;
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paint.setColorFragmentProcessor(std::move(fp));
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rtCtx->drawRect(nullptr, std::move(paint), GrAA::kNo, SkMatrix::Translate(tx, ty),
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SkRect::MakeIWH(256, 256));
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};
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{
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SkBitmap bmp;
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GetResourceAsBitmap("images/mandrill_256.png", &bmp);
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GrBitmapTextureMaker maker(ctx, bmp, GrImageTexGenPolicy::kDraw);
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auto view = maker.view(GrMipmapped::kNo);
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std::unique_ptr<GrFragmentProcessor> imgFP =
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GrTextureEffect::Make(std::move(view), bmp.alphaType(), SkMatrix());
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draw(std::move(imgFP), -128, 256, 0, 0);
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}
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{
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static constexpr SkColor colors[] = { 0xff00ff00, 0xffff00ff };
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const SkPoint pts[] = {{ 256, 0 }, { 512, 0 }};
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auto shader = SkGradientShader::MakeLinear(pts, colors, nullptr,
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SK_ARRAY_COUNT(colors),
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SkTileMode::kRepeat);
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SkMatrix matrix;
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SkSimpleMatrixProvider matrixProvider(matrix);
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GrColorInfo colorInfo;
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GrFPArgs args(ctx, matrixProvider, kHigh_SkFilterQuality, &colorInfo);
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std::unique_ptr<GrFragmentProcessor> gradientFP = as_SB(shader)->asFragmentProcessor(args);
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draw(std::move(gradientFP), -128, 256, 256, 0);
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}
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}
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