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