src/third_party/skia/gm/imagemagnifier.cpp

   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 "SkMagnifierImageFilter.h"
  10 #include "SkRandom.h"
  11
  12 #define WIDTH 500
  13 #define HEIGHT 500
  14
  15 namespace skiagm {
  16
  17 class ImageMagnifierGM : public GM {
  18 public:
  19     ImageMagnifierGM() {
  20         this->setBGColor(0xFF000000);
  21     }
  22
  23 protected:
  24     virtual uint32_t onGetFlags() const SK_OVERRIDE {
  25         // Skip tiled drawing until https://code.google.com/p/skia/issues/detail?id=781 is fixed.
  26         return this->INHERITED::onGetFlags() | GM::kSkipTiled_Flag;
  27     }
  28
  29     virtual SkString onShortName() SK_OVERRIDE {
  30         return SkString("imagemagnifier");
  31     }
  32
  33     virtual SkISize onISize() SK_OVERRIDE {
  34         return SkISize::Make(WIDTH, HEIGHT);
  35     }
  36
  37     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
  38         SkPaint filterPaint;
  39         filterPaint.setImageFilter(
  40             SkMagnifierImageFilter::Create(
  41                 SkRect::MakeXYWH(SkIntToScalar(100), SkIntToScalar(100),
  42                                  SkIntToScalar(WIDTH / 2),
  43                                  SkIntToScalar(HEIGHT / 2)),
  44                 100))->unref();
  45         canvas->saveLayer(NULL, &filterPaint);
  46         const char* str = "The quick brown fox jumped over the lazy dog.";
  47         SkRandom rand;
  48         for (int i = 0; i < 25; ++i) {
  49             int x = rand.nextULessThan(WIDTH);
  50             int y = rand.nextULessThan(HEIGHT);
  51             SkPaint paint;
  52             sk_tool_utils::set_portable_typeface(&paint);
  53             paint.setColor(rand.nextBits(24) | 0xFF000000);
  54             paint.setTextSize(rand.nextRangeScalar(0, 300));
  55             paint.setAntiAlias(true);
  56             canvas->drawText(str, strlen(str), SkIntToScalar(x),
  57                              SkIntToScalar(y), paint);
  58         }
  59         canvas->restore();
  60     }
  61
  62 private:
  63     typedef GM INHERITED;
  64 };
  65
  66 //////////////////////////////////////////////////////////////////////////////
  67
  68 static GM* MyFactory(void*) { return new ImageMagnifierGM; }
  69 static GMRegistry reg(MyFactory);
  70
  71 }