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| 1 /* |
| 2 * Copyright 2016 Google, Inc. |
| 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.h" |
| 9 |
| 10 /* |
| 11 * Draw 50 semi-transparent circles with pseudo-random positions, radii, and |
| 12 * colors, using the default blend mode (SRC OVER). Use of SkRandom with |
| 13 * default seed means results SHOULD be identical across multiple platforms. |
| 14 */ |
| 15 DEF_SIMPLE_GM(bubbles, canvas, 512, 512) { |
| 16 canvas->clear(SK_ColorWHITE); |
| 17 |
| 18 SkPaint p; |
| 19 p.setAntiAlias(true); |
| 20 |
| 21 SkRandom rand; |
| 22 |
| 23 auto pos_min = SkIntToScalar(0); |
| 24 auto pos_max = SkIntToScalar(511); |
| 25 auto radius_min = SkIntToScalar(0); |
| 26 auto radius_max = SkIntToScalar(128); |
| 27 auto color_min = SkIntToScalar(0); |
| 28 auto color_max = SkIntToScalar(255); |
| 29 |
| 30 const int NUM_BUBBLES = 50; |
| 31 for (int i = 0; i < NUM_BUBBLES; i++) { |
| 32 auto cx = rand.nextRangeScalar(pos_min, pos_max); |
| 33 auto cy = rand.nextRangeScalar(pos_min, pos_max); |
| 34 auto radius = rand.nextRangeScalar(radius_min, radius_max); |
| 35 |
| 36 auto a = (U8CPU)128; |
| 37 auto r = (U8CPU)rand.nextRangeScalar(color_min, color_max); |
| 38 auto g = (U8CPU)rand.nextRangeScalar(color_min, color_max); |
| 39 auto b = (U8CPU)rand.nextRangeScalar(color_min, color_max); |
| 40 p.setColor(SkColorSetARGB(a, r, g, b)); |
| 41 |
| 42 canvas->drawCircle(cx, cy, radius, p); |
| 43 } |
| 44 } |
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