1*c8dee2aaSAndroid Build Coastguard Worker // Copyright 2019 Google LLC.
2*c8dee2aaSAndroid Build Coastguard Worker // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3*c8dee2aaSAndroid Build Coastguard Worker #include "tools/fiddle/examples.h"
4*c8dee2aaSAndroid Build Coastguard Worker REG_FIDDLE(Matrix_mapXY_2, 256, 256, false, 4) {
draw(SkCanvas * canvas)5*c8dee2aaSAndroid Build Coastguard Worker void draw(SkCanvas* canvas) {
6*c8dee2aaSAndroid Build Coastguard Worker SkMatrix matrix;
7*c8dee2aaSAndroid Build Coastguard Worker SkPoint bitmapBounds[4], perspect[4] = {{50, 10}, {180, 40}, {236, 176}, {30, 206}};
8*c8dee2aaSAndroid Build Coastguard Worker SkRect::Make(source.bounds()).toQuad(bitmapBounds);
9*c8dee2aaSAndroid Build Coastguard Worker matrix.setPolyToPoly(bitmapBounds, perspect, 4);
10*c8dee2aaSAndroid Build Coastguard Worker SkPaint paint;
11*c8dee2aaSAndroid Build Coastguard Worker paint.setAntiAlias(true);
12*c8dee2aaSAndroid Build Coastguard Worker paint.setStrokeWidth(3);
13*c8dee2aaSAndroid Build Coastguard Worker for (int x : { 0, source.width() } ) {
14*c8dee2aaSAndroid Build Coastguard Worker for (int y : { 0, source.height() } ) {
15*c8dee2aaSAndroid Build Coastguard Worker canvas->drawPoint(matrix.mapXY(x, y), paint);
16*c8dee2aaSAndroid Build Coastguard Worker }
17*c8dee2aaSAndroid Build Coastguard Worker }
18*c8dee2aaSAndroid Build Coastguard Worker canvas->concat(matrix);
19*c8dee2aaSAndroid Build Coastguard Worker canvas->drawImage(image, 0, 0);
20*c8dee2aaSAndroid Build Coastguard Worker }
21*c8dee2aaSAndroid Build Coastguard Worker } // END FIDDLE
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