submodule/skia/docs/examples/Canvas_SaveLayerRec.cpp

   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 // HASH=ee8c0b120234e27364f8c9a786cf8f89
   5 REG_FIDDLE(Canvas_SaveLayerRec, 256, 160, false, 0) {
   6 void draw(SkCanvas* canvas) {
   7     SkPaint redPaint, bluePaint;
   8     redPaint.setAntiAlias(true);
   9     redPaint.setColor(SK_ColorRED);
  10     canvas->drawCircle(21, 21, 8, redPaint);
  11     bluePaint.setColor(SK_ColorBLUE);
  12     canvas->drawCircle(31, 21, 8, bluePaint);
  13     SkMatrix matrix;
  14     matrix.setScale(4, 4);
  15     auto scaler = SkImageFilters::MatrixTransform(matrix, SkSamplingOptions(), nullptr);
  16     SkCanvas::SaveLayerRec saveLayerRec(nullptr, nullptr, scaler.get(), 0);
  17     canvas->saveLayer(saveLayerRec);
  18     canvas->drawCircle(125, 85, 8, redPaint);
  19     canvas->restore();
  20 }
  21 }  // END FIDDLE