Pixmap_readPixels_3.cpp 1021 B

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  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=6ec7f7b2cc163cd29f627eef6d4b061c
  5. REG_FIDDLE(Pixmap_readPixels_3, 256, 256, false, 3) {
  6. void draw(SkCanvas* canvas) {
  7. SkImageInfo info = SkImageInfo::MakeN32Premul(image->width(), image->height());
  8. std::vector<int32_t> srcPixels;
  9. const int rowBytes = image->width() * 4;
  10. srcPixels.resize(image->height() * rowBytes);
  11. SkPixmap pixmap(info, (const void*) &srcPixels.front(), rowBytes);
  12. image->readPixels(pixmap, 0, 0);
  13. for (int offset : { 32, 64, 96 } ) {
  14. std::vector<int32_t> dstPixels;
  15. dstPixels.resize(image->height() * rowBytes);
  16. SkPixmap dstmap(info, &dstPixels.front(), rowBytes);
  17. pixmap.readPixels(dstmap, offset, 0);
  18. SkBitmap bitmap;
  19. bitmap.installPixels(dstmap);
  20. canvas->translate(32, 32);
  21. canvas->drawBitmap(bitmap, 0, 0);
  22. }
  23. }
  24. } // END FIDDLE