1 // Copyright 2019 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 <climits>
6 #include <random>
7
8 REG_FIDDLE(Bitmap_allocN32Pixels, 256, 256, false, 0) {
draw(SkCanvas * canvas)9 void draw(SkCanvas* canvas) {
10 SkBitmap bitmap;
11 bitmap.allocN32Pixels(64, 64);
12 bitmap.eraseColor(SK_ColorTRANSPARENT);
13 std::default_random_engine rng;
14 const auto randUint = [&rng](uint32_t min, uint32_t max) -> uint32_t {
15 return std::uniform_int_distribution<uint32_t>(min, max)(rng);
16 };
17
18 for (int y = 0; y < 256; y += 64) {
19 for (int x = 0; x < 256; x += 64) {
20 SkColor color = randUint(0, UINT_MAX);
21 uint32_t w = randUint(4, 32);
22 uint32_t cx = randUint(0, 64 - w);
23 uint32_t h = randUint(4, 32);
24 uint32_t cy = randUint(0, 64 - h);
25 bitmap.erase(color, SkIRect::MakeXYWH(cx, cy, w, h));
26 canvas->drawImage(bitmap.asImage(), x, y);
27 }
28 }
29 }
30 } // END FIDDLE
31