src/third_party/skia/gm/imageblurtiled.cpp

   1 /*
   2  * Copyright 2014 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 #define WIDTH 640
  13 #define HEIGHT 480
  14
  15 namespace skiagm {
  16
  17 class ImageBlurTiledGM : public GM {
  18 public:
  19     ImageBlurTiledGM(SkScalar sigmaX, SkScalar sigmaY)
  20         : fSigmaX(sigmaX), fSigmaY(sigmaY) {
  21     }
  22
  23 protected:
  24     virtual SkString onShortName() {
  25         return SkString("imageblurtiled");
  26     }
  27
  28     virtual SkISize onISize() {
  29         return SkISize::Make(WIDTH, HEIGHT);
  30     }
  31
  32     virtual void onDraw(SkCanvas* canvas) {
  33         SkPaint paint;
  34         paint.setImageFilter(SkBlurImageFilter::Create(fSigmaX, fSigmaY))->unref();
  35         const SkScalar tile_size = SkIntToScalar(128);
  36         SkRect bounds;
  37         if (!canvas->getClipBounds(&bounds)) {
  38             bounds.setEmpty();
  39         }
  40         for (SkScalar y = bounds.top(); y < bounds.bottom(); y += tile_size) {
  41             for (SkScalar x = bounds.left(); x < bounds.right(); x += tile_size) {
  42                 canvas->save();
  43                 canvas->clipRect(SkRect::MakeXYWH(x, y, tile_size, tile_size));
  44                 canvas->saveLayer(NULL, &paint);
  45                 const char* str[] = {
  46                     "The quick",
  47                     "brown fox",
  48                     "jumped over",
  49                     "the lazy dog.",
  50                 };
  51                 SkPaint textPaint;
  52                 textPaint.setAntiAlias(true);
  53                 sk_tool_utils::set_portable_typeface(&textPaint);
  54                 textPaint.setTextSize(SkIntToScalar(100));
  55                 int posY = 0;
  56                 for (unsigned i = 0; i < SK_ARRAY_COUNT(str); i++) {
  57                     posY += 100;
  58                     canvas->drawText(str[i], strlen(str[i]), SkIntToScalar(0),
  59                                      SkIntToScalar(posY), textPaint);
  60                 }
  61                 canvas->restore();
  62                 canvas->restore();
  63             }
  64         }
  65     }
  66
  67 private:
  68     SkScalar fSigmaX;
  69     SkScalar fSigmaY;
  70
  71     typedef GM INHERITED;
  72 };
  73
  74 //////////////////////////////////////////////////////////////////////////////
  75
  76 static GM* MyFactory1(void*) { return new ImageBlurTiledGM(3.0f, 3.0f); }
  77 static GMRegistry reg1(MyFactory1);
  78
  79 }