xref: /aosp_15_r20/external/skia/docs/examples/Bitmap_tryAllocPixels_2.cpp (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)
1*c8dee2aaSAndroid Build Coastguard Worker // Copyright 2019 Google LLC.
2*c8dee2aaSAndroid Build Coastguard Worker // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3*c8dee2aaSAndroid Build Coastguard Worker #include "tools/fiddle/examples.h"
4*c8dee2aaSAndroid Build Coastguard Worker REG_FIDDLE(Bitmap_tryAllocPixels_2, 256, 256, false, 3) {
draw(SkCanvas * canvas)5*c8dee2aaSAndroid Build Coastguard Worker void draw(SkCanvas* canvas) {
6*c8dee2aaSAndroid Build Coastguard Worker     SkBitmap bitmap;
7*c8dee2aaSAndroid Build Coastguard Worker     if (bitmap.tryAllocPixels(SkImageInfo::Make(64, 64, kGray_8_SkColorType, kOpaque_SkAlphaType))) {
8*c8dee2aaSAndroid Build Coastguard Worker         SkCanvas offscreen(bitmap);
9*c8dee2aaSAndroid Build Coastguard Worker         offscreen.scale(.25f, .5f);
10*c8dee2aaSAndroid Build Coastguard Worker         for (int y : { 0, 64, 128, 192 } ) {
11*c8dee2aaSAndroid Build Coastguard Worker             offscreen.drawImage(source.asImage(), -y, -y);
12*c8dee2aaSAndroid Build Coastguard Worker             canvas->drawImage(bitmap.asImage(), y, y);
13*c8dee2aaSAndroid Build Coastguard Worker         }
14*c8dee2aaSAndroid Build Coastguard Worker     }
15*c8dee2aaSAndroid Build Coastguard Worker }
16*c8dee2aaSAndroid Build Coastguard Worker }  // END FIDDLE
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