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      1 /*
      2  * Copyright 2012 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 "SkMorphologyImageFilter.h"
     10 
     11 #define WIDTH 700
     12 #define HEIGHT 560
     13 
     14 namespace skiagm {
     15 
     16 class MorphologyGM : public GM {
     17 public:
     18     MorphologyGM() {
     19         this->setBGColor(0xFF000000);
     20         fOnce = false;
     21     }
     22 
     23 protected:
     24     virtual SkString onShortName() {
     25         return SkString("morphology");
     26     }
     27 
     28     void make_bitmap() {
     29         fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 135, 135);
     30         fBitmap.allocPixels();
     31         SkBitmapDevice device(fBitmap);
     32         SkCanvas canvas(&device);
     33         canvas.clear(0x0);
     34         SkPaint paint;
     35         paint.setAntiAlias(true);
     36         const char* str1 = "ABC";
     37         const char* str2 = "XYZ";
     38         paint.setColor(0xFFFFFFFF);
     39         paint.setTextSize(64);
     40         canvas.drawText(str1, strlen(str1), 10, 55, paint);
     41         canvas.drawText(str2, strlen(str2), 10, 110, paint);
     42     }
     43 
     44     virtual SkISize onISize() {
     45         return make_isize(WIDTH, HEIGHT);
     46     }
     47 
     48     void drawClippedBitmap(SkCanvas* canvas, const SkPaint& paint, int x, int y) {
     49         canvas->save();
     50         canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
     51         canvas->clipRect(SkRect::MakeWH(
     52           SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height())));
     53         canvas->drawBitmap(fBitmap, 0, 0, &paint);
     54         canvas->restore();
     55     }
     56 
     57     virtual void onDraw(SkCanvas* canvas) {
     58         if (!fOnce) {
     59             make_bitmap();
     60             fOnce = true;
     61         }
     62         struct {
     63             int fWidth, fHeight;
     64             int fRadiusX, fRadiusY;
     65         } samples[] = {
     66             { 140, 140,   0,   0 },
     67             { 140, 140,   0,   2 },
     68             { 140, 140,   2,   0 },
     69             { 140, 140,   2,   2 },
     70             {  24,  24,  25,  25 },
     71         };
     72         SkPaint paint;
     73         SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(25, 20, 100, 80));
     74 
     75         for (unsigned j = 0; j < 4; ++j) {
     76             for (unsigned i = 0; i < SK_ARRAY_COUNT(samples); ++i) {
     77                 const SkImageFilter::CropRect* cr = j & 0x02 ? &cropRect : NULL;
     78                 if (j & 0x01) {
     79                     paint.setImageFilter(new SkErodeImageFilter(
     80                         samples[i].fRadiusX,
     81                         samples[i].fRadiusY,
     82                         NULL,
     83                         cr))->unref();
     84                 } else {
     85                     paint.setImageFilter(new SkDilateImageFilter(
     86                         samples[i].fRadiusX,
     87                         samples[i].fRadiusY,
     88                         NULL,
     89                         cr))->unref();
     90                 }
     91                 drawClippedBitmap(canvas, paint, i * 140, j * 140);
     92             }
     93         }
     94     }
     95 
     96 private:
     97     typedef GM INHERITED;
     98     SkBitmap fBitmap;
     99     bool fOnce;
    100 };
    101 
    102 //////////////////////////////////////////////////////////////////////////////
    103 
    104 static GM* MyFactory(void*) { return new MorphologyGM; }
    105 static GMRegistry reg(MyFactory);
    106 
    107 }
    108