xref: /aosp_15_r20/external/skia/docs/examples/Matrix_mapVectors_2.cpp (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)
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  REG_FIDDLE(Matrix_mapVectors_2, 256, 256, false, 0) {
draw(SkCanvas * canvas)5  void draw(SkCanvas* canvas) {
6      SkPaint paint;
7      paint.setAntiAlias(true);
8      paint.setStyle(SkPaint::kStroke_Style);
9      SkMatrix matrix;
10      matrix.setScale(2, 3);
11      SkVector radii[] = {{7, 7}, {3, 3}, {2, 2}, {4, 0}};
12      for (int i = 0; i < 4; ++i) {
13          SkRRect rrect;
14          rrect.setRectRadii({20, 20, 180, 70}, radii);
15          canvas->drawRRect(rrect, paint);
16          canvas->translate(0, 60);
17          matrix.mapVectors(radii, std::size(radii));
18      }
19  }
20  }  // END FIDDLE
21