45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
|
/*
|
||
|
|
* Copyright 2016 Google, Inc.
|
||
|
|
*
|
||
|
|
* Use of this source code is governed by a BSD-style license that can be
|
||
|
|
* found in the LICENSE file.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "gm.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Draw 50 semi-transparent circles with pseudo-random positions, radii, and
|
||
|
|
* colors, using the default blend mode (SRC OVER). Use of SkRandom with
|
||
|
|
* default seed means results SHOULD be identical across multiple platforms.
|
||
|
|
*/
|
||
|
|
DEF_SIMPLE_GM(bubbles, canvas, 512, 512) {
|
||
|
|
canvas->clear(SK_ColorWHITE);
|
||
|
|
|
||
|
|
SkPaint p;
|
||
|
|
p.setAntiAlias(true);
|
||
|
|
|
||
|
|
SkRandom rand;
|
||
|
|
|
||
|
|
auto pos_min = SkIntToScalar(0);
|
||
|
|
auto pos_max = SkIntToScalar(511);
|
||
|
|
auto radius_min = SkIntToScalar(0);
|
||
|
|
auto radius_max = SkIntToScalar(128);
|
||
|
|
auto color_min = SkIntToScalar(0);
|
||
|
|
auto color_max = SkIntToScalar(255);
|
||
|
|
|
||
|
|
const int NUM_BUBBLES = 50;
|
||
|
|
for (int i = 0; i < NUM_BUBBLES; i++) {
|
||
|
|
auto cx = rand.nextRangeScalar(pos_min, pos_max);
|
||
|
|
auto cy = rand.nextRangeScalar(pos_min, pos_max);
|
||
|
|
auto radius = rand.nextRangeScalar(radius_min, radius_max);
|
||
|
|
|
||
|
|
auto a = (U8CPU)128;
|
||
|
|
auto r = (U8CPU)rand.nextRangeScalar(color_min, color_max);
|
||
|
|
auto g = (U8CPU)rand.nextRangeScalar(color_min, color_max);
|
||
|
|
auto b = (U8CPU)rand.nextRangeScalar(color_min, color_max);
|
||
|
|
p.setColor(SkColorSetARGB(a, r, g, b));
|
||
|
|
|
||
|
|
canvas->drawCircle(cx, cy, radius, p);
|
||
|
|
}
|
||
|
|
}
|