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      1 /*
      2  * Copyright 2011 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 "SkBlurImageFilter.h"
     10 #include "SkRandom.h"
     11 
     12 // TODO deprecate imageblur
     13 
     14 #define WIDTH 500
     15 #define HEIGHT 500
     16 
     17 static const float kBlurSigmas[] = {
     18         0.0, 0.3f, 0.5f, 2.0f, 32.0f, 80.0f };
     19 
     20 const char* kTestStrings[] = {
     21         "The quick`~",
     22         "brown fox[]",
     23         "jumped over",
     24         "the lazy@#$",
     25         "dog.{}!%^&",
     26         "*()+=-\\'\"/",
     27 };
     28 
     29 namespace skiagm {
     30 
     31 class BlurImageFilter : public GM {
     32 public:
     33     BlurImageFilter() {
     34         this->setBGColor(0xFFFFFFFF);
     35         fName.printf("imageblur2");
     36     }
     37 
     38 protected:
     39     virtual uint32_t onGetFlags() const SK_OVERRIDE {
     40         return kSkipTiled_Flag;
     41     }
     42 
     43     virtual SkString onShortName() {
     44         return fName;
     45     }
     46 
     47     virtual SkISize onISize() {
     48         return SkISize::Make(WIDTH, HEIGHT);
     49     }
     50 
     51     virtual void onDraw(SkCanvas* canvas) {
     52         const int sigmaCount = SK_ARRAY_COUNT(kBlurSigmas);
     53         const int testStringCount = SK_ARRAY_COUNT(kTestStrings);
     54         SkScalar dx = WIDTH / sigmaCount;
     55         SkScalar dy = HEIGHT / sigmaCount;
     56         const SkScalar textSize = 12;
     57 
     58         for (int x = 0; x < sigmaCount; x++) {
     59             SkScalar sigmaX = kBlurSigmas[x];
     60             for (int y = 0; y < sigmaCount; y++) {
     61                 SkScalar sigmaY = kBlurSigmas[y];
     62 
     63                 SkPaint paint;
     64                 paint.setImageFilter(SkBlurImageFilter::Create(sigmaX, sigmaY))->unref();
     65                 canvas->saveLayer(NULL, &paint);
     66 
     67                 SkRandom rand;
     68                 SkPaint textPaint;
     69                 textPaint.setAntiAlias(false);
     70                 textPaint.setColor(rand.nextBits(24) | 0xFF000000);
     71                 textPaint.setTextSize(textSize);
     72 
     73                 for (int i = 0; i < testStringCount; i++) {
     74                     canvas->drawText(kTestStrings[i],
     75                                      strlen(kTestStrings[i]),
     76                                      SkIntToScalar(x * dx),
     77                                      SkIntToScalar(y * dy + textSize * i + textSize),
     78                                      textPaint);
     79                 }
     80                 canvas->restore();
     81             }
     82         }
     83     }
     84 
     85 private:
     86     SkString fName;
     87 
     88     typedef GM INHERITED;
     89 };
     90 
     91 //////////////////////////////////////////////////////////////////////////////
     92 
     93 static GM* MyFactory(void*) { return new BlurImageFilter; }
     94 static GMRegistry reg(MyFactory);
     95 
     96 }
     97