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=c69cd2a590b5733c3cbc92cb9ceed3f5
5 REG_FIDDLE(Matrix_mapRectToQuad, 256, 192, false, 0) {
draw(SkCanvas * canvas)6 void draw(SkCanvas* canvas) {
7 SkPaint paint;
8 paint.setAntiAlias(true);
9 SkMatrix matrix;
10 matrix.setRotate(60, 128, 128);
11 SkRect rect = {50, 50, 150, 150};
12 SkPoint pts[4];
13 matrix.mapRectToQuad(pts, rect);
14 for (int i = 0; i < 4; ++i) {
15 canvas->drawCircle(pts[i].fX, pts[i].fY, 3, paint);
16 }
17 canvas->concat(matrix);
18 paint.setStyle(SkPaint::kStroke_Style);
19 canvas->drawRect(rect, paint);
20 }
21 } // END FIDDLE
22