xref: /third_party/skia/docs/examples/Bitmap_notifyPixelsChanged.cpp
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1cb93a386Sopenharmony_ci// Copyright 2019 Google LLC.
2cb93a386Sopenharmony_ci// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3cb93a386Sopenharmony_ci#include "tools/fiddle/examples.h"
4cb93a386Sopenharmony_ci// HASH=8f463ed17b0ed4fb9c503a0ec71706f9
5cb93a386Sopenharmony_ciREG_FIDDLE(Bitmap_notifyPixelsChanged, 256, 20, false, 0) {
6cb93a386Sopenharmony_civoid draw(SkCanvas* canvas) {
7cb93a386Sopenharmony_ci    SkBitmap bitmap;
8cb93a386Sopenharmony_ci    bitmap.setInfo(SkImageInfo::Make(1, 1, kRGBA_8888_SkColorType, kOpaque_SkAlphaType));
9cb93a386Sopenharmony_ci    bitmap.allocPixels();
10cb93a386Sopenharmony_ci    bitmap.eraseColor(SK_ColorRED);
11cb93a386Sopenharmony_ci    canvas->scale(16, 16);
12cb93a386Sopenharmony_ci    canvas->drawImage(bitmap.asImage(), 0, 0);
13cb93a386Sopenharmony_ci    *(SkPMColor*) bitmap.getPixels() = SkPreMultiplyColor(SK_ColorBLUE);
14cb93a386Sopenharmony_ci    canvas->drawImage(bitmap.asImage(), 2, 0);
15cb93a386Sopenharmony_ci    bitmap.notifyPixelsChanged();
16cb93a386Sopenharmony_ci    *(SkPMColor*) bitmap.getPixels() = SkPreMultiplyColor(SK_ColorGREEN);
17cb93a386Sopenharmony_ci    canvas->drawImage(bitmap.asImage(), 4, 0);
18cb93a386Sopenharmony_ci}
19cb93a386Sopenharmony_ci}  // END FIDDLE
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Indexes created Thu Nov 07 10:32:03 CST 2024