SkImageTest.cpp 1.5 KB

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  1. /*
  2. * Copyright 2015 Google Inc.
  3. *
  4. * Use of this source code is governed by a BSD-style license that can be
  5. * found in the LICENSE file.
  6. */
  7. #include "include/core/SkCanvas.h"
  8. #include "src/core/SkImagePriv.h"
  9. #include "tests/Test.h"
  10. static const int gWidth = 20;
  11. static const int gHeight = 20;
  12. // Tests that SkNewImageFromBitmap obeys pixelref origin.
  13. DEF_TEST(SkImageFromBitmap_extractSubset, reporter) {
  14. sk_sp<SkImage> image;
  15. {
  16. SkBitmap srcBitmap;
  17. srcBitmap.allocN32Pixels(gWidth, gHeight);
  18. srcBitmap.eraseColor(SK_ColorRED);
  19. SkCanvas canvas(srcBitmap);
  20. SkIRect r = SkIRect::MakeXYWH(5, 5, gWidth - 5, gWidth - 5);
  21. SkPaint p;
  22. p.setColor(SK_ColorGREEN);
  23. canvas.drawIRect(r, p);
  24. SkBitmap dstBitmap;
  25. srcBitmap.extractSubset(&dstBitmap, r);
  26. image = SkImage::MakeFromBitmap(dstBitmap);
  27. }
  28. SkBitmap tgt;
  29. tgt.allocN32Pixels(gWidth, gHeight);
  30. SkCanvas canvas(tgt);
  31. canvas.clear(SK_ColorTRANSPARENT);
  32. canvas.drawImage(image, 0, 0, nullptr);
  33. uint32_t pixel = 0;
  34. SkImageInfo info = SkImageInfo::Make(1, 1, kBGRA_8888_SkColorType, kUnpremul_SkAlphaType);
  35. tgt.readPixels(info, &pixel, 4, 0, 0);
  36. REPORTER_ASSERT(reporter, pixel == SK_ColorGREEN);
  37. tgt.readPixels(info, &pixel, 4, gWidth - 6, gWidth - 6);
  38. REPORTER_ASSERT(reporter, pixel == SK_ColorGREEN);
  39. tgt.readPixels(info, &pixel, 4, gWidth - 5, gWidth - 5);
  40. REPORTER_ASSERT(reporter, pixel == SK_ColorTRANSPARENT);
  41. }