text: // Copyright 2020 Google LLC.
  // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
  #include "tools/fiddle/examples.h"
  REG_FIDDLE_SRGB(50_percent_srgb, 256, 256, false, 0, 0, false) {
  static sk_sp<SkShader> make() {
      auto surf = SkSurface::MakeRasterN32Premul(2, 2);
      surf->getCanvas()->drawColor(SK_ColorWHITE);
      surf->getCanvas()->drawRect({0, 0, 1, 1}, SkPaint());
      surf->getCanvas()->drawRect({1, 1, 2, 2}, SkPaint());
      return surf->makeImageSnapshot()->makeShader(SkTileMode::kRepeat,
                                                   SkTileMode::kRepeat,
                                                   SkSamplingOptions(SkFilterMode::kLinear));
  }
  
  void draw(SkCanvas* canvas) {
      canvas->drawColor(SK_ColorWHITE);
  
      const SkRect r = { 0, 0, 100, 100 };
      SkPaint p;
      p.setShader(make());
      // this is a dither
      canvas->drawRect({0, 0, 50, 50}, p);
  
      canvas->scale(0.5, 0.5);
      canvas->translate(100, 0);
      canvas->drawRect(r, p);
      p.setShader(nullptr);
  
      p.setColor(0xFF808080);
      canvas->translate(100, 0);
      canvas->drawRect(r, p);
  
      p.setColor(0x80000000);
      canvas->translate(100, 0);
      canvas->drawRect(r, p);
  }
  }  // END FIDDLE
  