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