ImageInfo_gammaCloseToSRGB.cpp 1.6 KB

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  1. #if 0 // Disabled until updated to use current API.
  2. // Copyright 2019 Google LLC.
  3. // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
  4. #include "tools/fiddle/examples.h"
  5. // HASH=22df72732e898a11773fbfe07388a546
  6. REG_FIDDLE(ImageInfo_gammaCloseToSRGB, 256, 144, false, 0) {
  7. void draw(SkCanvas* canvas) {
  8. const int width = 256;
  9. const int height = 64;
  10. auto drawLabel = [=](const char* what, bool closeToSRGB) -> void {
  11. SkString string;
  12. string.printf("%s gamma is %s" "close to sRGB", what, closeToSRGB ? "" : "not ");
  13. SkPaint paint;
  14. paint.setAntiAlias(true);
  15. canvas->drawString(string, 20, 56, paint);
  16. };
  17. SkColor gradColors[] = { 0xFFFF7F00, 0xFF00FF7F, 0xFF0000FF, 0xFF7F7FFF };
  18. SkPoint gradPoints[] = { { 0, 0 }, { width, 0 }, { width * 2, 0 }, { width * 3, 0 } };
  19. SkPaint gradPaint;
  20. gradPaint.setShader(SkGradientShader::MakeLinear(gradPoints, gradColors, nullptr,
  21. SK_ARRAY_COUNT(gradColors), SkShader::kClamp_TileMode));
  22. canvas->drawRect(SkRect::MakeWH(width, height), gradPaint);
  23. drawLabel("canvas", canvas->imageInfo().gammaCloseToSRGB());
  24. SkBitmap bitmap;
  25. SkImageInfo offscreenInfo = SkImageInfo::MakeS32(width, height, kPremul_SkAlphaType);
  26. bitmap.allocPixels(offscreenInfo);
  27. SkCanvas sRGBOffscreen(bitmap);
  28. sRGBOffscreen.drawRect(SkRect::MakeWH(width, height), gradPaint);
  29. canvas->translate(0, 80);
  30. canvas->drawBitmap(bitmap, 0, 0);
  31. drawLabel("offscreen", offscreenInfo.gammaCloseToSRGB());
  32. }
  33. } // END FIDDLE
  34. #endif // Disabled until updated to use current API.