1 /* 2 * Copyright 2021 Google LLC. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "gm/gm.h" 9 #include "include/core/SkCanvas.h" 10 #include "include/core/SkRect.h" 11 #include "include/effects/SkRuntimeEffect.h" 12 #include "tools/DecodeUtils.h" 13 #include "tools/Resources.h" 14 15 namespace skiagm { 16 17 DEF_SIMPLE_GM(destcolor, canvas, 640, 640) { 18 // Draw the mandrill. 19 canvas->drawImage(ToolUtils::GetResourceAsImage("images/mandrill_512.png"), 0, 0); 20 21 // Now let's add our test effect on top. It reads back the original image and inverts it. 22 auto [effect, error] = SkRuntimeEffect::MakeForBlender(SkString(R"( 23 half4 main(half4 src, half4 dst) { 24 return (half4(1) - dst).rgb1; 25 } 26 )")); 27 SkASSERT(effect); 28 SkPaint invertPaint; 29 invertPaint.setAntiAlias(true); 30 invertPaint.setBlender(effect->makeBlender(nullptr)); 31 canvas->drawOval(SkRect::MakeLTRB(128, 128, 640, 640), invertPaint); 32 } 33 34 } // namespace skiagm 35
