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- // Copyright 2019 Google LLC.
- // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
- #include "tools/fiddle/examples.h"
- // HASH=b1ead09c67a177ab8eace12b061610a7
- REG_FIDDLE(Matrix_mapXY_2, 256, 256, false, 4) {
- void draw(SkCanvas* canvas) {
- SkMatrix matrix;
- SkPoint bitmapBounds[4], perspect[4] = {{50, 10}, {180, 40}, {236, 176}, {30, 206}};
- SkRect::Make(source.bounds()).toQuad(bitmapBounds);
- matrix.setPolyToPoly(bitmapBounds, perspect, 4);
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setStrokeWidth(3);
- for (int x : { 0, source.width() } ) {
- for (int y : { 0, source.height() } ) {
- canvas->drawPoint(matrix.mapXY(x, y), paint);
- }
- }
- canvas->concat(matrix);
- canvas->drawBitmap(source, 0, 0);
- }
- } // END FIDDLE
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