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(Surface_readPixels_2, 256, 64, false, 0) {
draw(SkCanvas * canvas)5 void draw(SkCanvas* canvas) {
6 sk_sp<SkSurface> surf(SkSurfaces::Raster(SkImageInfo::MakeN32Premul(64, 64)));
7 auto surfCanvas = surf->getCanvas();
8 surfCanvas->clear(SK_ColorRED);
9 SkPaint paint;
10 surfCanvas->drawOval({4, 8, 58, 54}, paint);
11 SkImageInfo info = SkImageInfo::Make(64, 64, kBGRA_8888_SkColorType, kPremul_SkAlphaType);
12 sk_sp<SkData> data(SkData::MakeUninitialized(info.minRowBytes() * info.height()));
13 sk_bzero(data->writable_data(), info.minRowBytes() * info.height());
14 for (int x : { 32, -32 } ) {
15 for (int y : { 32, -32 } ) {
16 surf->readPixels(info, data->writable_data(), info.minRowBytes(), x, y);
17 }
18 }
19 sk_sp<SkImage> image = SkImages::RasterFromData(info, data, info.minRowBytes());
20 canvas->drawImage(image, 0, 0);
21 }
22 } // END FIDDLE
23