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_mapRectToQuad, 256, 192, false, 0) {
draw(SkCanvas * canvas)5 void draw(SkCanvas* canvas) {
6 SkPaint paint;
7 paint.setAntiAlias(true);
8 SkMatrix matrix;
9 matrix.setRotate(60, 128, 128);
10 SkRect rect = {50, 50, 150, 150};
11 SkPoint pts[4];
12 matrix.mapRectToQuad(pts, rect);
13 for (int i = 0; i < 4; ++i) {
14 canvas->drawCircle(pts[i].fX, pts[i].fY, 3, paint);
15 }
16 canvas->concat(matrix);
17 paint.setStyle(SkPaint::kStroke_Style);
18 canvas->drawRect(rect, paint);
19 }
20 } // END FIDDLE
21