submodule/skia/docs/examples/shapes_with_motion.cpp

   1 // Copyright 2020 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_ANIMATED(shapes_with_motion, 256, 256, false, 5, 4) {
   5 void draw(SkCanvas* canvas) {
   6     //float p = 1 - fabs(2 * frame - 1);
   7     float p = 0.5 * (1 - cos(6.28318548f * frame));
   8     canvas->drawColor(SK_ColorWHITE);
   9
  10     SkPaint paint;
  11     paint.setStyle(SkPaint::kFill_Style);
  12     paint.setAntiAlias(true);
  13     paint.setStrokeWidth(4);
  14     paint.setColor(0xffFE938C);
  15
  16     SkRect rect = SkRect::MakeXYWH(10, 10, 100, 160);
  17     canvas->drawRect(rect, paint);
  18
  19     SkRRect oval;
  20     oval.setOval(rect);
  21     oval.offset(40, p * 80);
  22     paint.setColor(0xffE6B89C);
  23     canvas->drawRRect(oval, paint);
  24
  25     paint.setColor(0xff9CAFB7);
  26     canvas->drawCircle(180 * p, 50, 25, paint);
  27
  28     rect.offset(80, 50);
  29     paint.setColor(0xff4281A4);
  30     paint.setStyle(SkPaint::kStroke_Style);
  31     canvas->drawRoundRect(rect, 10, 10, paint);
  32 }
  33 }  // END FIDDLE