Matrix_mapXY.cpp 773 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=9e50185d502dc6903783679a84106089
  5. REG_FIDDLE(Matrix_mapXY, 256, 256, false, 0) {
  6. void draw(SkCanvas* canvas) {
  7. SkPaint paint;
  8. paint.setAntiAlias(true);
  9. SkMatrix matrix;
  10. matrix.setRotate(60, 128, 128);
  11. SkPoint lines[] = {{50, 50}, {150, 50}, {150, 150}};
  12. for (size_t i = 0; i < SK_ARRAY_COUNT(lines); ++i) {
  13. SkPoint pt;
  14. matrix.mapXY(lines[i].fX, lines[i].fY, &pt);
  15. canvas->drawCircle(pt.fX, pt.fY, 3, paint);
  16. }
  17. canvas->concat(matrix);
  18. canvas->drawPoints(SkCanvas::kPolygon_PointMode, SK_ARRAY_COUNT(lines), lines, paint);
  19. }
  20. } // END FIDDLE