xref: /aosp_15_r20/external/skia/docs/examples/Matrix_mapPoints_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_mapPoints_2, 256, 256, false, 0) {
draw(SkCanvas * canvas)5 void draw(SkCanvas* canvas) {
6     SkMatrix matrix;
7     matrix.setRotate(35, 128, 128);
8     const int count = 4;
9     SkPoint pts[count];
10     matrix.mapRectToQuad(pts, {40, 70, 180, 220} );
11     SkPaint paint;
12     paint.setARGB(77, 23, 99, 154);
13     for (int i = 0; i < 5; ++i) {
14         canvas->drawPoints(SkCanvas::kPolygon_PointMode, count, pts, paint);
15         matrix.mapPoints(pts, count);
16     }
17 }
18 }  // END FIDDLE
19