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