Color_Type_RGBA_8888.cpp 1.4 KB

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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=947922a19d59893fe7f9d9ee1954379b
  5. REG_FIDDLE(Color_Type_RGBA_8888, 256, 96, false, 0) {
  6. void draw(SkCanvas* canvas) {
  7. canvas->scale(16, 16);
  8. SkBitmap bitmap;
  9. SkImageInfo imageInfo = SkImageInfo::Make(2, 2, kRGBA_8888_SkColorType, kPremul_SkAlphaType);
  10. bitmap.allocPixels(imageInfo);
  11. SkCanvas offscreen(bitmap);
  12. offscreen.clear(SK_ColorGREEN);
  13. canvas->drawBitmap(bitmap, 0, 0);
  14. auto pack8888 = [](unsigned a, unsigned r, unsigned g, unsigned b) -> uint32_t {
  15. return (r << 0) | (g << 8) | (b << 16) | (a << 24);
  16. };
  17. uint32_t red8888[] = { pack8888(0xFF, 0xFF, 0x0, 0x0), pack8888(0xFF, 0xbb, 0x0, 0x0),
  18. pack8888(0xFF, 0x77, 0x0, 0x0), pack8888(0xFF, 0x33, 0x0, 0x0) };
  19. uint32_t blue8888[] = { pack8888(0xFF, 0x0, 0x0, 0x0FF), pack8888(0xFF, 0x0, 0x0, 0x0bb),
  20. pack8888(0xFF, 0x0, 0x0, 0x077), pack8888(0xFF, 0x0, 0x0, 0x033) };
  21. SkPixmap redPixmap(imageInfo, &red8888, imageInfo.minRowBytes());
  22. if (bitmap.writePixels(redPixmap, 0, 0)) {
  23. canvas->drawBitmap(bitmap, 2, 2);
  24. }
  25. SkPixmap bluePixmap(imageInfo, &blue8888, imageInfo.minRowBytes());
  26. if (bitmap.writePixels(bluePixmap, 0, 0)) {
  27. canvas->drawBitmap(bitmap, 4, 4);
  28. }
  29. }
  30. } // END FIDDLE