Canvas_writePixels.cpp 658 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=29b98ebf58aa9fd1edfaabf9f4490b3a
  5. REG_FIDDLE(Canvas_writePixels, 256, 256, false, 0) {
  6. void draw(SkCanvas* canvas) {
  7. SkImageInfo imageInfo = SkImageInfo::MakeN32(256, 1, kPremul_SkAlphaType);
  8. for (int y = 0; y < 256; ++y) {
  9. uint32_t pixels[256];
  10. for (int x = 0; x < 256; ++x) {
  11. pixels[x] = SkColorSetARGB(x, (x + y) % 256, x, (x - y) & 0xFF);
  12. }
  13. canvas->writePixels(imageInfo, &pixels, sizeof(pixels), 0, y);
  14. }
  15. }
  16. } // END FIDDLE