Matrix_cheapEqualTo.cpp 922 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=39016b3cfc6bbabb09348a53822ce508
  5. REG_FIDDLE(Matrix_cheapEqualTo, 256, 256, true, 0) {
  6. void draw(SkCanvas* canvas) {
  7. auto debugster = [](const char* prefix, const SkMatrix& a, const SkMatrix& b) -> void {
  8. SkDebugf("%s: a %c= b a.cheapEqualTo(b): %s\n", prefix,
  9. a == b ? '=' : '!', a.cheapEqualTo(b) ? "true" : "false");
  10. };
  11. SkMatrix a, b;
  12. a.setAll(1, 0, 0, 0, 1, 0, 0, 0, 1);
  13. b.setIdentity();
  14. debugster("identity", a, b);
  15. a.setAll(1, -0.0f, 0, 0, 1, 0, 0, 0, 1);
  16. debugster("neg zero", a, b);
  17. a.setAll(1, SK_ScalarNaN, 0, 0, 1, 0, 0, 0, 1);
  18. debugster(" one NaN", a, b);
  19. b.setAll(1, SK_ScalarNaN, 0, 0, 1, 0, 0, 0, 1);
  20. debugster("both NaN", a, b);
  21. }
  22. } // END FIDDLE