xref: /aosp_15_r20/external/skia/docs/examples/Canvas_SaveLayerRec.cpp (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)
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 REG_FIDDLE(Canvas_SaveLayerRec, 256, 160, false, 0) {
draw(SkCanvas * canvas)5 void draw(SkCanvas* canvas) {
6     SkPaint redPaint, bluePaint;
7     redPaint.setAntiAlias(true);
8     redPaint.setColor(SK_ColorRED);
9     canvas->drawCircle(21, 21, 8, redPaint);
10     bluePaint.setColor(SK_ColorBLUE);
11     canvas->drawCircle(31, 21, 8, bluePaint);
12     SkMatrix matrix;
13     matrix.setScale(4, 4);
14     auto scaler = SkImageFilters::MatrixTransform(matrix, SkSamplingOptions(), nullptr);
15     SkCanvas::SaveLayerRec saveLayerRec(nullptr, nullptr, scaler.get(), 0);
16     canvas->saveLayer(saveLayerRec);
17     canvas->drawCircle(125, 85, 8, redPaint);
18     canvas->restore();
19 }
20 }  // END FIDDLE
21