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      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 
     10 namespace skiagm {
     11 
     12 // Draw rects with various stroke widths at 1/8 pixel increments
     13 class ThinStrokedRectsGM : public GM {
     14 public:
     15     ThinStrokedRectsGM() {
     16         this->setBGColor(0xFF000000);
     17     }
     18 
     19 protected:
     20     virtual uint32_t onGetFlags() const SK_OVERRIDE {
     21         return kSkipTiled_Flag;
     22     }
     23 
     24     virtual SkString onShortName() SK_OVERRIDE {
     25         return SkString("thinstrokedrects");
     26     }
     27 
     28     virtual SkISize onISize() SK_OVERRIDE {
     29         return SkISize::Make(240, 320);
     30     }
     31 
     32     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
     33 
     34         SkPaint paint;
     35         paint.setColor(SK_ColorWHITE);
     36         paint.setStyle(SkPaint::kStroke_Style);
     37         paint.setAntiAlias(true);
     38 
     39         static const SkRect rect = { 0, 0, 10, 10 };
     40         static const SkRect rect2 = { 0, 0, 20, 20 };
     41 
     42         static const SkScalar gStrokeWidths[] = {
     43             4, 2, 1, 0.5f, 0.25f, 0.125f, 0
     44         };
     45 
     46         canvas->translate(5, 5);
     47         for (int i = 0; i < 8; ++i) {
     48             canvas->save();
     49             canvas->translate(i*0.125f, i*30.0f);
     50             for (size_t j = 0; j < SK_ARRAY_COUNT(gStrokeWidths); ++j) {
     51                 paint.setStrokeWidth(gStrokeWidths[j]);
     52                 canvas->drawRect(rect, paint);
     53                 canvas->translate(15, 0);
     54             }
     55             canvas->restore();
     56         }
     57 
     58         // Draw a second time in red with a scale
     59         paint.setColor(SK_ColorRED);
     60         canvas->translate(0, 15);
     61         for (int i = 0; i < 8; ++i) {
     62             canvas->save();
     63             canvas->translate(i*0.125f, i*30.0f);
     64             canvas->scale(0.5f, 0.5f);
     65             for (size_t j = 0; j < SK_ARRAY_COUNT(gStrokeWidths); ++j) {
     66                 paint.setStrokeWidth(2.0f * gStrokeWidths[j]);
     67                 canvas->drawRect(rect2, paint);
     68                 canvas->translate(30, 0);
     69             }
     70             canvas->restore();
     71         }
     72     }
     73 
     74 private:
     75     typedef GM INHERITED;
     76 };
     77 
     78 //////////////////////////////////////////////////////////////////////////////
     79 
     80 DEF_GM( return SkNEW(ThinStrokedRectsGM); )
     81 
     82 }
     83