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      1 
      2 /*
      3  * Copyright 2011 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 
      9 
     10 
     11 #include "gm.h"
     12 #include "SkRandom.h"
     13 
     14 namespace skiagm {
     15 
     16 #define W   400
     17 #define H   400
     18 #define N   100
     19 
     20 static const SkScalar SW = SkIntToScalar(W);
     21 static const SkScalar SH = SkIntToScalar(H);
     22 
     23 class StrokeRectGM : public GM {
     24 public:
     25     StrokeRectGM() {}
     26 
     27 protected:
     28     virtual SkString onShortName() {
     29         return SkString("strokerects");
     30     }
     31 
     32     virtual SkISize onISize() {
     33         return make_isize(W*2, H*2);
     34     }
     35 
     36     static void rnd_rect(SkRect* r, SkRandom& rand) {
     37         SkScalar x = rand.nextUScalar1() * W;
     38         SkScalar y = rand.nextUScalar1() * H;
     39         SkScalar w = rand.nextUScalar1() * (W >> 2);
     40         SkScalar h = rand.nextUScalar1() * (H >> 2);
     41         SkScalar hoffset = rand.nextSScalar1();
     42         SkScalar woffset = rand.nextSScalar1();
     43 
     44         r->set(x, y, x + w, y + h);
     45         r->offset(-w/2 + woffset, -h/2 + hoffset);
     46     }
     47 
     48     virtual void onDraw(SkCanvas* canvas) {
     49         SkPaint paint;
     50         paint.setStyle(SkPaint::kStroke_Style);
     51 
     52         for (int y = 0; y < 2; y++) {
     53             paint.setAntiAlias(!!y);
     54             for (int x = 0; x < 2; x++) {
     55                 paint.setStrokeWidth(x * SkIntToScalar(3));
     56 
     57                 SkAutoCanvasRestore acr(canvas, true);
     58                 canvas->translate(SW * x, SH * y);
     59                 canvas->clipRect(SkRect::MakeLTRB(
     60                         SkIntToScalar(2), SkIntToScalar(2)
     61                         , SW - SkIntToScalar(2), SH - SkIntToScalar(2)
     62                 ));
     63 
     64                 SkRandom rand;
     65                 for (int i = 0; i < N; i++) {
     66                     SkRect r;
     67                     rnd_rect(&r, rand);
     68                     canvas->drawRect(r, paint);
     69                 }
     70             }
     71         }
     72     }
     73 
     74 private:
     75     typedef GM INHERITED;
     76 };
     77 
     78 //////////////////////////////////////////////////////////////////////////////
     79 
     80 static GM* MyFactory(void*) { return new StrokeRectGM; }
     81 static GMRegistry reg(MyFactory);
     82 
     83 }
     84 
     85