59 lines
1.6 KiB
C++
59 lines
1.6 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/SkData.h"
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#include "include/core/SkPaint.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/effects/SkRuntimeEffect.h"
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static const char* RUNTIME_FUNCTIONS_SRC = R"(
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uniform half4 gColor;
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half scale(float x) {
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return x / 255;
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}
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half4 blackAndWhite(half4 raw) {
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half value = raw.r * 0.22 + raw.g * 0.67 + raw.b * 0.11;
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return half4(value.xxx, raw.a);
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}
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half4 main(float2 p) {
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return blackAndWhite(half4(scale(p.x), scale(p.y), gColor.b, 1));
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}
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)";
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class RuntimeFunctions : public skiagm::GM {
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bool runAsBench() const override { return true; }
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SkString onShortName() override { return SkString("runtimefunctions"); }
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SkISize onISize() override { return {256, 256}; }
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void onDraw(SkCanvas* canvas) override {
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sk_sp<SkRuntimeEffect> gEffect =
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SkRuntimeEffect::MakeForShader(SkString(RUNTIME_FUNCTIONS_SRC)).effect;
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SkASSERT(gEffect);
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SkMatrix localM;
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localM.setRotate(90, 128, 128);
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SkColor4f inputColor = { 1, 0, 0, 1 };
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auto shader = gEffect->makeShader(SkData::MakeWithCopy(&inputColor, sizeof(inputColor)),
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nullptr, 0, &localM);
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SkPaint p;
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p.setShader(std::move(shader));
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canvas->drawRect({0, 0, 256, 256}, p);
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}
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};
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DEF_GM(return new RuntimeFunctions;)
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