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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 
     10 #include "SkBitmapSource.h"
     11 #include "SkBlurImageFilter.h"
     12 #include "SkColorFilter.h"
     13 #include "SkColorMatrixFilter.h"
     14 #include "SkColorFilterImageFilter.h"
     15 #include "SkMergeImageFilter.h"
     16 #include "SkMorphologyImageFilter.h"
     17 #include "SkXfermodeImageFilter.h"
     18 
     19 #include "SkTestImageFilters.h"
     20 
     21 ///////////////////////////////////////////////////////////////////////////////
     22 
     23 class ImageFiltersGraphGM : public skiagm::GM {
     24 public:
     25     ImageFiltersGraphGM() : fInitialized(false) {}
     26 
     27 protected:
     28     virtual SkString onShortName() {
     29         return SkString("imagefiltersgraph");
     30     }
     31 
     32     void make_bitmap() {
     33         fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
     34         fBitmap.allocPixels();
     35         SkDevice device(fBitmap);
     36         SkCanvas canvas(&device);
     37         canvas.clear(0x00000000);
     38         SkPaint paint;
     39         paint.setAntiAlias(true);
     40         paint.setColor(0xFFFFFFFF);
     41         paint.setTextSize(SkIntToScalar(96));
     42         const char* str = "e";
     43         canvas.drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70), paint);
     44     }
     45 
     46     virtual SkISize onISize() { return SkISize::Make(200, 100); }
     47 
     48     virtual void onDraw(SkCanvas* canvas) {
     49         if (!fInitialized) {
     50             this->make_bitmap();
     51             fInitialized = true;
     52         }
     53         canvas->clear(0x00000000);
     54         {
     55             SkAutoTUnref<SkImageFilter> bitmapSource(new SkBitmapSource(fBitmap));
     56             SkAutoTUnref<SkColorFilter> cf(SkColorFilter::CreateModeFilter(SK_ColorRED,
     57                                                          SkXfermode::kSrcIn_Mode));
     58             SkAutoTUnref<SkImageFilter> blur(new SkBlurImageFilter(4.0f, 4.0f, bitmapSource));
     59             SkAutoTUnref<SkImageFilter> erode(new SkErodeImageFilter(4, 4, blur));
     60             SkAutoTUnref<SkImageFilter> color(SkColorFilterImageFilter::Create(cf, erode));
     61             SkAutoTUnref<SkImageFilter> merge(new SkMergeImageFilter(blur, color));
     62 
     63             SkPaint paint;
     64             paint.setImageFilter(merge);
     65             canvas->drawPaint(paint);
     66         }
     67         {
     68             SkAutoTUnref<SkImageFilter> morph(new SkDilateImageFilter(5, 5));
     69 
     70             SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0,
     71                                     0, SK_Scalar1, 0, 0, 0,
     72                                     0, 0, SK_Scalar1, 0, 0,
     73                                     0, 0, 0, SkFloatToScalar(0.5f), 0 };
     74 
     75             SkAutoTUnref<SkColorFilter> matrixFilter(new SkColorMatrixFilter(matrix));
     76             SkAutoTUnref<SkImageFilter> colorMorph(SkColorFilterImageFilter::Create(matrixFilter, morph));
     77             SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(SkXfermode::kSrcOver_Mode));
     78             SkAutoTUnref<SkImageFilter> blendColor(new SkXfermodeImageFilter(mode, colorMorph));
     79 
     80             SkPaint paint;
     81             paint.setImageFilter(blendColor);
     82             canvas->drawBitmap(fBitmap, 100, 0, &paint);
     83         }
     84     }
     85 
     86 private:
     87     typedef GM INHERITED;
     88     SkBitmap fBitmap;
     89     bool fInitialized;
     90 };
     91 
     92 ///////////////////////////////////////////////////////////////////////////////
     93 
     94 static skiagm::GM* MyFactory(void*) { return new ImageFiltersGraphGM; }
     95 static skiagm::GMRegistry reg(MyFactory);
     96