xref: /aosp_15_r20/external/skia/docs/examples/Canvas_kInitWithPrevious_SaveLayerFlag.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_kInitWithPrevious_SaveLayerFlag, 256, 160, false, 0) {
draw(SkCanvas * canvas)5 void draw(SkCanvas* canvas) {
6     SkPaint redPaint, bluePaint, scalePaint;
7     redPaint.setColor(SK_ColorRED);
8     canvas->drawCircle(21, 21, 8, redPaint);
9     bluePaint.setColor(SK_ColorBLUE);
10     canvas->drawCircle(31, 21, 8, bluePaint);
11     SkMatrix matrix;
12     matrix.setScale(4, 4);
13     scalePaint.setAlpha(0x40);
14     scalePaint.setImageFilter(
15             SkImageFilters::MatrixTransform(matrix, SkSamplingOptions(), nullptr));
16     SkCanvas::SaveLayerRec saveLayerRec(nullptr, &scalePaint,
17             SkCanvas::kInitWithPrevious_SaveLayerFlag);
18     canvas->saveLayer(saveLayerRec);
19     canvas->restore();
20 }
21 }  // END FIDDLE
22