xref: /aosp_15_r20/external/skia/docs/examples/Bitmap_getPixels.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_getPixels, 256, 256, true, 0) {
draw(SkCanvas * canvas)5 void draw(SkCanvas* canvas) {
6     SkBitmap bitmap;
7     bitmap.setInfo(SkImageInfo::MakeN32(4, 4, kPremul_SkAlphaType));
8     bitmap.allocPixels();
9     bitmap.eraseColor(0x00000000);
10     void* baseAddr = bitmap.getPixels();
11     *(SkPMColor*)baseAddr = 0xFFFFFFFF;
12     SkDebugf("bitmap.getColor(0, 1) %c= 0x00000000\n",
13               bitmap.getColor(0, 1)  == 0x00000000 ? '=' : '!');
14     SkDebugf("bitmap.getColor(0, 0) %c= 0xFFFFFFFF\n",
15               bitmap.getColor(0, 0)  == 0xFFFFFFFF ? '=' : '!');
16 }
17 }  // END FIDDLE
18