xref: /aosp_15_r20/external/skia/docs/examples/sweep_gradient_talk_lots.cpp (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)
1 // Copyright 2020 Google LLC.
2 // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3 #include "tools/fiddle/examples.h"
4 
5 #include <random>
6 
7 REG_FIDDLE(sweep_gradient_talk_lots, 256, 256, false, 0) {
draw(SkCanvas * canvas)8 void draw(SkCanvas* canvas) {
9     std::default_random_engine rng;
10     const auto randOpaqueColor = [&rng]() -> SkColor {
11         return std::uniform_int_distribution<uint32_t>(0, 0xFFFFFF)(rng) | 0xFF000000;
12     };
13     SkColor colors[100];
14     for (auto& color : colors) {
15         color = randOpaqueColor();
16     }
17     float cx = 128, cy = 128;
18     SkPaint paint;
19     paint.setShader(SkGradientShader::MakeSweep(cx, cy, colors, nullptr, 100));
20     canvas->drawPaint(paint);
21 }
22 }  // END FIDDLE
23