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=0e03cd9f154603ed4b21ca56d69dae44
5 REG_FIDDLE(Matrix_invert, 256, 128, false, 0) {
draw(SkCanvas * canvas)6 void draw(SkCanvas* canvas) {
7 const SkPoint src[] = { { 10, 120}, {120, 120}, {120, 10}, { 10, 10} };
8 const SkPoint dst[] = { {150, 120}, {200, 100}, {240, 30}, { 130, 40} };
9 SkPaint paint;
10 paint.setAntiAlias(true);
11 SkMatrix matrix;
12 matrix.setPolyToPoly(src, dst, 4);
13 canvas->drawPoints(SkCanvas::kPolygon_PointMode, 4, src, paint);
14 canvas->drawPoints(SkCanvas::kPolygon_PointMode, 4, dst, paint);
15 paint.setColor(SK_ColorBLUE);
16 paint.setStrokeWidth(3);
17 paint.setStrokeCap(SkPaint::kRound_Cap);
18 canvas->drawPoints(SkCanvas::kPoints_PointMode, 4, dst, paint);
19 if (matrix.invert(&matrix)) {
20 canvas->concat(matrix);
21 canvas->drawPoints(SkCanvas::kPoints_PointMode, 4, dst, paint);
22 }
23 }
24 } // END FIDDLE
25