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Add bubbles GM for drawing/blending 50 circles.

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Positions, radii, and colors are determined pseudo-randomly.

R=tomhudson@google.com
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2004173002

Review-Url: https://codereview.chromium.org/2004173002
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fmenozzi 2016-05-23 13:54:22 -07:00 committed by Commit bot
parent 074b48ecb5
commit c75d6a8e43
1 changed files with 44 additions and 0 deletions
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gm/bubbles.cpp Normal file
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/*
* 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);
}
}