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_mapXY, 256, 256, 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 SkPoint lines[] = {{50, 50}, {150, 50}, {150, 150}};
11 for (size_t i = 0; i < std::size(lines); ++i) {
12 SkPoint pt;
13 matrix.mapXY(lines[i].fX, lines[i].fY, &pt);
14 canvas->drawCircle(pt.fX, pt.fY, 3, paint);
15 }
16 canvas->concat(matrix);
17 canvas->drawPoints(SkCanvas::kPolygon_PointMode, std::size(lines), lines, paint);
18 }
19 } // END FIDDLE
20