Home | History | Annotate | Download | only in gm 
      1 /*
      2  * Copyright 2013 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.h"
      9 #include "SkRandom.h"
     10 #include "SkRRect.h"
     11 
     12 namespace skiagm {
     13 
     14 // Test out various combinations of nested rects, ovals and rrects.
     15 class NestedGM : public GM {
     16 public:
     17     NestedGM(bool doAA) : fDoAA(doAA) {
     18         this->setBGColor(0xFFDDDDDD);
     19     }
     20 
     21 protected:
     22 
     23     SkString onShortName() override {
     24         SkString name("nested");
     25         if (fDoAA) {
     26             name.append("_aa");
     27         } else {
     28             name.append("_bw");
     29         }
     30         return name;
     31     }
     32 
     33     SkISize onISize() override {
     34         return SkISize::Make(kImageWidth, kImageHeight);
     35     }
     36 
     37     enum Shapes {
     38         kRect_Shape = 0,
     39         kRRect_Shape,
     40         kOval_Shape,
     41         kShapeCount
     42     };
     43 
     44     static void AddShape(SkPath* path, const SkRect& rect, Shapes shape, SkPath::Direction dir) {
     45         switch (shape) {
     46             case kRect_Shape:
     47                 path->addRect(rect, dir);
     48                 break;
     49             case kRRect_Shape: {
     50                 SkRRect rr;
     51                 rr.setRectXY(rect, 5, 5);
     52                 path->addRRect(rr, dir);
     53                 break;
     54                 }
     55             case kOval_Shape:
     56                 path->addOval(rect, dir);
     57                 break;
     58             default:
     59                 break;
     60         }
     61     }
     62 
     63     void onDraw(SkCanvas* canvas) override {
     64 
     65         SkPaint shapePaint;
     66         shapePaint.setColor(SK_ColorBLACK);
     67         shapePaint.setAntiAlias(fDoAA);
     68 
     69         SkRect outerRect = SkRect::MakeWH(40, 40);
     70 
     71         SkRect innerRects[] = {
     72             { 10, 10, 30, 30 },     // small
     73             { .5f, 18, 4.5f, 22 }   // smaller and offset to left
     74         };
     75 
     76         // draw a background pattern to make transparency errors more apparent
     77         SkRandom rand;
     78 
     79         for (int y = 0; y < kImageHeight; y += 10) {
     80             for (int x = 0; x < kImageWidth; x += 10) {
     81                 SkRect r = SkRect::MakeXYWH(SkIntToScalar(x),
     82                                             SkIntToScalar(y),
     83                                             10, 10);
     84                 SkPaint p;
     85                 p.setColor(rand.nextU() | 0xFF000000);
     86                 canvas->drawRect(r, p);
     87             }
     88         }
     89 
     90         canvas->translate(2, 2);
     91         for (int outerShape = 0; outerShape < kShapeCount; ++outerShape) {
     92             canvas->save();
     93             for (int innerShape = 0; innerShape < kShapeCount; ++innerShape) {
     94                 for (size_t innerRect = 0; innerRect < SK_ARRAY_COUNT(innerRects); ++innerRect) {
     95                     SkPath path;
     96 
     97                     AddShape(&path, outerRect, (Shapes) outerShape, SkPath::kCW_Direction);
     98                     AddShape(&path, innerRects[innerRect], (Shapes) innerShape,
     99                              SkPath::kCCW_Direction);
    100 
    101                     canvas->drawPath(path, shapePaint);
    102                     canvas->translate(45, 0);
    103                 }
    104             }
    105             canvas->restore();
    106             canvas->translate(0, 45);
    107         }
    108 
    109     }
    110 
    111 private:
    112     static const int kImageWidth = 269;
    113     static const int kImageHeight = 134;
    114 
    115     bool fDoAA;
    116 
    117     typedef GM INHERITED;
    118 };
    119 
    120 ///////////////////////////////////////////////////////////////////////////////
    121 
    122 DEF_GM( return new NestedGM(true); )
    123 DEF_GM( return new NestedGM(false); )
    124 
    125 
    126 }
    127