xref: /aosp_15_r20/external/skia/docs/examples/Bitmap_tryAllocPixels_2.cpp (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)
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 REG_FIDDLE(Bitmap_tryAllocPixels_2, 256, 256, false, 3) {
draw(SkCanvas * canvas)5 void draw(SkCanvas* canvas) {
6     SkBitmap bitmap;
7     if (bitmap.tryAllocPixels(SkImageInfo::Make(64, 64, kGray_8_SkColorType, kOpaque_SkAlphaType))) {
8         SkCanvas offscreen(bitmap);
9         offscreen.scale(.25f, .5f);
10         for (int y : { 0, 64, 128, 192 } ) {
11             offscreen.drawImage(source.asImage(), -y, -y);
12             canvas->drawImage(bitmap.asImage(), y, y);
13         }
14     }
15 }
16 }  // END FIDDLE
17