5d7759e1f4
While trying to debug matrix sampling, I wanted to make these easier to work with. Change-Id: I24889277e7bf0dbdabf012028248c32641c98232 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/292838 Commit-Queue: Brian Osman <brianosman@google.com> Reviewed-by: Brian Osman <brianosman@google.com>
90 lines
3.5 KiB
C++
90 lines
3.5 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/GrContextPriv.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 SampleMatrixConstantEffect : public GrFragmentProcessor {
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public:
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static constexpr GrProcessor::ClassID CLASS_ID = (GrProcessor::ClassID) 1;
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SampleMatrixConstantEffect(std::unique_ptr<GrFragmentProcessor> child)
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: INHERITED(CLASS_ID, kNone_OptimizationFlags) {
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child->setSampleMatrix(SkSL::SampleMatrix(SkSL::SampleMatrix::Kind::kVariable));
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this->registerChildProcessor(std::move(child));
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}
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const char* name() const override { return "SampleMatrixConstantEffect"; }
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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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typedef GrFragmentProcessor INHERITED;
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};
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class GLSLSampleMatrixConstantEffect : public GrGLSLFragmentProcessor {
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void emitCode(EmitArgs& args) override {
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GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
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SkString sample = this->invokeChildWithMatrix(0, args, "float3x3(0.5)");
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fragBuilder->codeAppendf("%s = %s;\n", args.fOutputColor, sample.c_str());
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}
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};
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GrGLSLFragmentProcessor* SampleMatrixConstantEffect::onCreateGLSLInstance() const {
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return new GLSLSampleMatrixConstantEffect();
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}
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DEF_SIMPLE_GPU_GM(sample_matrix_constant, ctx, rtCtx, canvas, 512, 256) {
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auto draw = [rtCtx](std::unique_ptr<GrFragmentProcessor> baseFP, int tx, int ty) {
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auto fp = std::unique_ptr<GrFragmentProcessor>(
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new SampleMatrixConstantEffect(std::move(baseFP)));
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GrPaint paint;
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paint.addColorFragmentProcessor(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), 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[] = {{ 0, 0 }, { 256, 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::kClamp);
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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), 256, 0);
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}
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}
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