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=b1ead09c67a177ab8eace12b061610a7
5 REG_FIDDLE(Matrix_mapXY_2, 256, 256, false, 4) {
draw(SkCanvas * canvas)6 void draw(SkCanvas* canvas) {
7 SkMatrix matrix;
8 SkPoint bitmapBounds[4], perspect[4] = {{50, 10}, {180, 40}, {236, 176}, {30, 206}};
9 SkRect::Make(source.bounds()).toQuad(bitmapBounds);
10 matrix.setPolyToPoly(bitmapBounds, perspect, 4);
11 SkPaint paint;
12 paint.setAntiAlias(true);
13 paint.setStrokeWidth(3);
14 for (int x : { 0, source.width() } ) {
15 for (int y : { 0, source.height() } ) {
16 canvas->drawPoint(matrix.mapXY(x, y), paint);
17 }
18 }
19 canvas->concat(matrix);
20 canvas->drawImage(image, 0, 0);
21 }
22 } // END FIDDLE
23