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      1 /*
      2  * Copyright 2013 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 "Resources.h"
     11 #include "SkGradientShader.h"
     12 #include "SkTypeface.h"
     13 #include "SkImageDecoder.h"
     14 #include "SkStream.h"
     15 #include "SkPaint.h"
     16 
     17 static void setTypeface(SkPaint* paint, const char name[], SkTypeface::Style style) {
     18     SkSafeUnref(paint->setTypeface(SkTypeface::CreateFromName(name, style)));
     19 }
     20 
     21 class DownsampleBitmapGM : public skiagm::GM {
     22 public:
     23     SkBitmap    fBM;
     24     SkString    fName;
     25     bool        fBitmapMade;
     26     SkPaint::FilterLevel fFilterLevel;
     27 
     28     DownsampleBitmapGM(SkPaint::FilterLevel filterLevel)
     29         : fFilterLevel(filterLevel)
     30     {
     31         this->setBGColor(0xFFDDDDDD);
     32         fBitmapMade = false;
     33     }
     34 
     35     const char* filterLevelToString() {
     36         static const char *filterLevelNames[] = {
     37             "none", "low", "medium", "high"
     38         };
     39         return filterLevelNames[fFilterLevel];
     40     }
     41 
     42 protected:
     43     virtual uint32_t onGetFlags() const SK_OVERRIDE {
     44         if (SkPaint::kHigh_FilterLevel != fFilterLevel) {
     45             return kSkipTiled_Flag;
     46         }
     47         return 0;
     48     }
     49 
     50     virtual SkString onShortName() SK_OVERRIDE {
     51         return fName;
     52     }
     53 
     54     virtual SkISize onISize() SK_OVERRIDE {
     55         make_bitmap_wrapper();
     56         return SkISize::Make(4 * fBM.width(), fBM.height());
     57     }
     58 
     59     void make_bitmap_wrapper() {
     60         if (!fBitmapMade) {
     61             fBitmapMade = true;
     62             make_bitmap();
     63         }
     64     }
     65 
     66     virtual void make_bitmap() = 0;
     67 
     68     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
     69         make_bitmap_wrapper();
     70 
     71         int curX = 0;
     72         int curWidth;
     73         float curScale = 1;
     74         do {
     75 
     76             SkMatrix matrix;
     77             matrix.setScale( curScale, curScale );
     78 
     79             SkPaint paint;
     80             paint.setFilterLevel(fFilterLevel);
     81 
     82             canvas->save();
     83             canvas->translate( (SkScalar) curX, 0.f );
     84             canvas->drawBitmapMatrix( fBM, matrix, &paint );
     85             canvas->restore();
     86 
     87             curWidth = (int) (fBM.width() * curScale + 2);
     88             curX += curWidth;
     89             curScale *= 0.75f;
     90         } while (curWidth >= 2 && curX < 4*fBM.width());
     91     }
     92 
     93 private:
     94     typedef skiagm::GM INHERITED;
     95 };
     96 
     97 class DownsampleBitmapTextGM: public DownsampleBitmapGM {
     98   public:
     99       DownsampleBitmapTextGM(float textSize, SkPaint::FilterLevel filterLevel)
    100       : INHERITED(filterLevel), fTextSize(textSize)
    101         {
    102             fName.printf("downsamplebitmap_text_%s_%.2fpt", this->filterLevelToString(), fTextSize);
    103         }
    104 
    105   protected:
    106       float fTextSize;
    107 
    108       virtual void make_bitmap() SK_OVERRIDE {
    109           fBM.allocN32Pixels(int(fTextSize * 8), int(fTextSize * 6));
    110           SkCanvas canvas(fBM);
    111           canvas.drawColor(SK_ColorWHITE);
    112 
    113           SkPaint paint;
    114           paint.setAntiAlias(true);
    115           paint.setSubpixelText(true);
    116           paint.setTextSize(fTextSize);
    117 
    118           setTypeface(&paint, "Times", SkTypeface::kNormal);
    119           canvas.drawText("Hamburgefons", 12, fTextSize/2, 1.2f*fTextSize, paint);
    120           setTypeface(&paint, "Times", SkTypeface::kBold);
    121           canvas.drawText("Hamburgefons", 12, fTextSize/2, 2.4f*fTextSize, paint);
    122           setTypeface(&paint, "Times", SkTypeface::kItalic);
    123           canvas.drawText("Hamburgefons", 12, fTextSize/2, 3.6f*fTextSize, paint);
    124           setTypeface(&paint, "Times", SkTypeface::kBoldItalic);
    125           canvas.drawText("Hamburgefons", 12, fTextSize/2, 4.8f*fTextSize, paint);
    126       }
    127   private:
    128       typedef DownsampleBitmapGM INHERITED;
    129 };
    130 
    131 class DownsampleBitmapCheckerboardGM: public DownsampleBitmapGM {
    132   public:
    133       DownsampleBitmapCheckerboardGM(int size, int numChecks, SkPaint::FilterLevel filterLevel)
    134       : INHERITED(filterLevel), fSize(size), fNumChecks(numChecks)
    135         {
    136             fName.printf("downsamplebitmap_checkerboard_%s_%d_%d", this->filterLevelToString(), fSize, fNumChecks);
    137         }
    138 
    139   protected:
    140       int fSize;
    141       int fNumChecks;
    142 
    143       virtual void make_bitmap() SK_OVERRIDE {
    144           fBM.allocN32Pixels(fSize, fSize);
    145           for (int y = 0; y < fSize; ++y) {
    146               for (int x = 0; x < fSize; ++x) {
    147                   SkPMColor* s = fBM.getAddr32(x, y);
    148                   int cx = (x * fNumChecks) / fSize;
    149                   int cy = (y * fNumChecks) / fSize;
    150                   if ((cx+cy)%2) {
    151                       *s = 0xFFFFFFFF;
    152                   } else {
    153                       *s = 0xFF000000;
    154                   }
    155               }
    156           }
    157       }
    158   private:
    159       typedef DownsampleBitmapGM INHERITED;
    160 };
    161 
    162 class DownsampleBitmapImageGM: public DownsampleBitmapGM {
    163   public:
    164       DownsampleBitmapImageGM(const char filename[], SkPaint::FilterLevel filterLevel)
    165       : INHERITED(filterLevel), fFilename(filename)
    166         {
    167             fName.printf("downsamplebitmap_image_%s_%s", this->filterLevelToString(), filename);
    168         }
    169 
    170   protected:
    171       SkString fFilename;
    172       int fSize;
    173 
    174       virtual void make_bitmap() SK_OVERRIDE {
    175           SkString resourcePath = GetResourcePath();
    176           resourcePath.append("/");
    177           resourcePath.append(fFilename);
    178 
    179           SkImageDecoder* codec = NULL;
    180           SkFILEStream stream(resourcePath.c_str());
    181           if (stream.isValid()) {
    182               codec = SkImageDecoder::Factory(&stream);
    183           }
    184           if (codec) {
    185               stream.rewind();
    186               codec->decode(&stream, &fBM, kN32_SkColorType, SkImageDecoder::kDecodePixels_Mode);
    187               SkDELETE(codec);
    188           } else {
    189               fBM.allocN32Pixels(1, 1);
    190               *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
    191           }
    192           fSize = fBM.height();
    193       }
    194   private:
    195       typedef DownsampleBitmapGM INHERITED;
    196 };
    197 
    198 //////////////////////////////////////////////////////////////////////////////
    199 
    200 DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kHigh_FilterLevel); )
    201 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kHigh_FilterLevel); )
    202 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kHigh_FilterLevel); )
    203 
    204 DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kMedium_FilterLevel); )
    205 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kMedium_FilterLevel); )
    206 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kMedium_FilterLevel); )
    207 
    208 DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kLow_FilterLevel); )
    209 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kLow_FilterLevel); )
    210 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kLow_FilterLevel); )
    211 
    212 DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kNone_FilterLevel); )
    213 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kNone_FilterLevel); )
    214 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kNone_FilterLevel); )
    215