submodule/skia/docs/examples/Image_MakeRasterData.cpp

   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 // HASH=22e7ce79ab2fe94252d23319f2258127
   5 REG_FIDDLE(Image_MakeRasterData, 256, 256, false, 3) {
   6 void draw(SkCanvas* canvas) {
   7     size_t rowBytes = image->width() * SkColorTypeBytesPerPixel(kRGBA_8888_SkColorType);
   8     sk_sp<SkData> data = SkData::MakeUninitialized(rowBytes * image->height());
   9     SkImageInfo dstInfo = SkImageInfo::MakeN32(image->width(), image->height(),
  10                                                kPremul_SkAlphaType);
  11     image->readPixels(nullptr, dstInfo, data->writable_data(), rowBytes, 0, 0, SkImage::kAllow_CachingHint);
  12     sk_sp<SkImage> raw = SkImage::MakeRasterData(dstInfo.makeColorType(kRGBA_8888_SkColorType),
  13                                                  data, rowBytes);
  14     canvas->drawImage(image, 0, 0);
  15     canvas->drawImage(raw.get(), 128, 0);
  16 }
  17 }  // END FIDDLE