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