gm/imageblur2.cpp

   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 "sk_tool_utils.h"
  10 #include "SkBlurImageFilter.h"
  11 #include "SkRandom.h"
  12
  13 // TODO deprecate imageblur
  14
  15 #define WIDTH 500
  16 #define HEIGHT 500
  17
  18 constexpr float kBlurSigmas[] = {
  19         0.0, 0.3f, 0.5f, 2.0f, 32.0f, 80.0f };
  20
  21 const char* kTestStrings[] = {
  22         "The quick`~",
  23         "brown fox[]",
  24         "jumped over",
  25         "the lazy@#$",
  26         "dog.{}!%^&",
  27         "*()+=-\\'\"/",
  28 };
  29
  30 namespace skiagm {
  31
  32 class BlurImageFilter : public GM {
  33 public:
  34     BlurImageFilter() {
  35         this->setBGColor(0xFFFFFFFF);
  36         fName.printf("imageblur2");
  37     }
  38
  39 protected:
  40
  41     SkString onShortName() override {
  42         return fName;
  43     }
  44
  45     SkISize onISize() override {
  46         return SkISize::Make(WIDTH, HEIGHT);
  47     }
  48
  49     void onDraw(SkCanvas* canvas) override {
  50         const int sigmaCount = SK_ARRAY_COUNT(kBlurSigmas);
  51         const int testStringCount = SK_ARRAY_COUNT(kTestStrings);
  52         SkScalar dx = WIDTH / sigmaCount;
  53         SkScalar dy = HEIGHT / sigmaCount;
  54         const SkScalar textSize = 12;
  55
  56         for (int x = 0; x < sigmaCount; x++) {
  57             SkScalar sigmaX = kBlurSigmas[x];
  58             for (int y = 0; y < sigmaCount; y++) {
  59                 SkScalar sigmaY = kBlurSigmas[y];
  60
  61                 SkPaint paint;
  62                 paint.setImageFilter(SkBlurImageFilter::Make(sigmaX, sigmaY, nullptr));
  63                 canvas->saveLayer(nullptr, &paint);
  64
  65                 SkRandom rand;
  66                 SkPaint textPaint;
  67                 textPaint.setAntiAlias(false);
  68                 textPaint.setColor(sk_tool_utils::color_to_565(rand.nextBits(24) | 0xFF000000));
  69                 sk_tool_utils::set_portable_typeface(&textPaint);
  70                 textPaint.setTextSize(textSize);
  71
  72                 for (int i = 0; i < testStringCount; i++) {
  73                     canvas->drawString(kTestStrings[i],
  74                                        SkIntToScalar(x * dx),
  75                                        SkIntToScalar(y * dy + textSize * i + textSize),
  76                                        textPaint);
  77                 }
  78                 canvas->restore();
  79             }
  80         }
  81     }
  82
  83 private:
  84     SkString fName;
  85
  86     typedef GM INHERITED;
  87 };
  88
  89 //////////////////////////////////////////////////////////////////////////////
  90
  91 DEF_GM(return new BlurImageFilter;)
  92
  93 }