fmenozzi | c75d6a8 | 2016-05-23 13:54:22 -0700 | [diff] [blame] | 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 | } |