| Hal Canary | 8751512 | 2019-03-15 14:22:51 -0400 | [diff] [blame] | 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 "fiddle/examples.h" |
| 4 | // HASH=b1ead09c67a177ab8eace12b061610a7 |
| Hal Canary | a7181e7c | 2019-03-18 16:06:34 -0400 | [diff] [blame] | 5 | REG_FIDDLE(Matrix_mapXY_2, 256, 256, false, 4) { |
| Hal Canary | 8751512 | 2019-03-15 14:22:51 -0400 | [diff] [blame] | 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->drawBitmap(source, 0, 0); |
| 21 | } |
| 22 | } // END FIDDLE |