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(Canvas_readPixels_a, 64, 64, false, 0) {
draw(SkCanvas * canvas)5 void draw(SkCanvas* canvas) {
6 canvas->clear(SK_ColorBLUE);
7 SkPaint paint;
8 canvas->drawCircle(32, 32, 28, paint);
9 SkImageInfo info = SkImageInfo::Make(64, 64, kBGRA_8888_SkColorType, kPremul_SkAlphaType);
10 sk_sp<SkData> data(SkData::MakeUninitialized(info.minRowBytes() * info.height()));
11 sk_bzero(data->writable_data(), info.minRowBytes() * info.height());
12 for (int x : { 32, -32 } ) {
13 for (int y : { 32, -32 } ) {
14 canvas->readPixels(info, data->writable_data(), info.minRowBytes(), x, y);
15 }
16 }
17 sk_sp<SkImage> image = SkImages::RasterFromData(info, data, info.minRowBytes());
18 canvas->drawImage(image, 0, 0);
19 }
20 } // END FIDDLE
21