submodule/skia/gm/drrect_small_inner.cpp

   1 /*
   2  * Copyright 2017 Google Inc.
   3  *
   4  * Use of this source code is governed by a BSD-style license that can be
   5  * found in the LICENSE file.
   6  */
   7
   8 #include "gm/gm.h"
   9 #include "include/core/SkCanvas.h"
  10 #include "include/core/SkPaint.h"
  11 #include "include/core/SkRRect.h"
  12 #include "include/core/SkRect.h"
  13 #include "include/core/SkScalar.h"
  14
  15 #include <initializer_list>
  16
  17 DEF_SIMPLE_GM(drrect_small_inner, canvas, 170, 610) {
  18     SkPaint paint;
  19     paint.setAntiAlias(true);
  20     static constexpr SkScalar kOuterRadius = 35.f;
  21     auto outer = SkRRect::MakeOval(SkRect::MakeXYWH(0, 0, 2 * kOuterRadius, 2 * kOuterRadius));
  22     canvas->translate(10.f, 10.f);
  23     canvas->save();
  24     for (bool offcenter : {false, true}) {
  25         for (bool oval : {false, true}) {
  26             for (SkScalar innerRadiusX : {1.f, 0.5f, 0.1f, .01f}) {
  27                 SkScalar innerRadiusY = innerRadiusX;
  28                 if (oval) {
  29                     innerRadiusY *= 0.95f;
  30                 }
  31                 SkScalar tx = kOuterRadius - innerRadiusX;
  32                 SkScalar ty = kOuterRadius - innerRadiusY;
  33                 if (offcenter) {
  34                     tx += 1.f;
  35                 }
  36                 auto inner = SkRRect::MakeOval(
  37                         SkRect::MakeXYWH(tx, ty, 2 * innerRadiusX, 2 * innerRadiusY));
  38                 canvas->drawDRRect(outer, inner, paint);
  39                 canvas->translate(0, 2 * kOuterRadius + 5);
  40             }
  41         }
  42         canvas->restore();
  43         canvas->translate(2 * kOuterRadius + 2, 0);
  44     }
  45     canvas->restore();
  46 }