5843012837
This allows fragment processors to sample their children with their local coordinate system transformed by a matrix. Change-Id: Ifa848bbd85b939bbc5751fec5cf8f89ee904bf39 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/282590 Reviewed-by: Brian Salomon <bsalomon@google.com> Reviewed-by: Brian Osman <brianosman@google.com> Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
102 lines
3.6 KiB
C++
102 lines
3.6 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/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkImageInfo.h"
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#include "include/core/SkMatrix.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkShader.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/core/SkTileMode.h"
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#include "include/core/SkTypes.h"
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#include "include/gpu/GrContext.h"
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#include "src/gpu/GrBitmapTextureMaker.h"
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#include "src/gpu/GrCaps.h"
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#include "src/gpu/GrContextPriv.h"
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#include "src/gpu/GrCoordTransform.h"
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#include "src/gpu/GrFragmentProcessor.h"
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#include "src/gpu/GrRenderTargetContext.h"
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#include "src/gpu/GrRenderTargetContextPriv.h"
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#include "src/gpu/effects/GrRRectEffect.h"
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#include "src/gpu/effects/GrSkSLFP.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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#include "tools/ToolUtils.h"
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class SampleCoordEffect : public GrFragmentProcessor {
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public:
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static constexpr GrProcessor::ClassID CLASS_ID = (GrProcessor::ClassID) 0;
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SampleCoordEffect(std::unique_ptr<GrFragmentProcessor> child)
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: INHERITED(CLASS_ID, kNone_OptimizationFlags) {
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child->setSampledWithExplicitCoords();
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this->registerChildProcessor(std::move(child));
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}
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const char* name() const override { return "SampleCoordEffect"; }
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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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}
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bool onIsEqual(const GrFragmentProcessor&) const override {
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SkASSERT(false);
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return true;
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}
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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 GLSLSampleCoordEffect : public GrGLSLFragmentProcessor {
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void emitCode(EmitArgs& args) override {
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GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
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SkString sample1 = this->invokeChild(0, args, "float2(sk_FragCoord.x, sk_FragCoord.y)");
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SkString sample2 = this->invokeChild(0, args, "float2(sk_FragCoord.x, 512-sk_FragCoord.y)");
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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* SampleCoordEffect::onCreateGLSLInstance() const {
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return new GLSLSampleCoordEffect();
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}
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DEF_SIMPLE_GPU_GM_BG(fpcoordinateoverride, ctx, rtCtx, canvas, 512, 512,
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ToolUtils::color_to_565(0xFF66AA99)) {
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SkRect bounds = SkRect::MakeIWH(512, 512);
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SkBitmap bmp;
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GetResourceAsBitmap("images/mandrill_512_q075.jpg", &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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if (!view) {
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return;
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}
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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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auto fp = std::unique_ptr<GrFragmentProcessor>(new SampleCoordEffect(std::move(imgFP)));
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GrPaint grPaint;
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grPaint.addCoverageFragmentProcessor(std::move(fp));
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rtCtx->priv().testingOnly_addDrawOp(GrFillRectOp::MakeNonAARect(ctx,
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std::move(grPaint),
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SkMatrix::I(),
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bounds));
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}
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