| // Copyright 2019 Google LLC. |
| // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. |
| #include "tools/fiddle/examples.h" |
| |
| #include <climits> |
| #include <random> |
| |
| REG_FIDDLE(Bitmap_allocN32Pixels, 256, 256, false, 0) { |
| void draw(SkCanvas* canvas) { |
| SkBitmap bitmap; |
| bitmap.allocN32Pixels(64, 64); |
| bitmap.eraseColor(SK_ColorTRANSPARENT); |
| std::default_random_engine rng; |
| const auto randUint = [&rng](uint32_t min, uint32_t max) -> uint32_t { |
| return std::uniform_int_distribution<uint32_t>(min, max)(rng); |
| }; |
| |
| for (int y = 0; y < 256; y += 64) { |
| for (int x = 0; x < 256; x += 64) { |
| SkColor color = randUint(0, UINT_MAX); |
| uint32_t w = randUint(4, 32); |
| uint32_t cx = randUint(0, 64 - w); |
| uint32_t h = randUint(4, 32); |
| uint32_t cy = randUint(0, 64 - h); |
| bitmap.erase(color, SkIRect::MakeXYWH(cx, cy, w, h)); |
| canvas->drawImage(bitmap.asImage(), x, y); |
| } |
| } |
| } |
| } // END FIDDLE |