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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 #include "sk_tool_utils.h"
     10 
     11 #include "Resources.h"
     12 #include "SkGradientShader.h"
     13 #include "SkTypeface.h"
     14 #include "SkStream.h"
     15 #include "SkPaint.h"
     16 
     17 static void make_checker(SkBitmap* bm, int size, int numChecks) {
     18     bm->allocN32Pixels(size, size);
     19     for (int y = 0; y < size; ++y) {
     20         for (int x = 0; x < size; ++x) {
     21             SkPMColor* s = bm->getAddr32(x, y);
     22             int cx = (x * numChecks) / size;
     23             int cy = (y * numChecks) / size;
     24             if ((cx+cy)%2) {
     25                 *s = 0xFFFFFFFF;
     26             } else {
     27                 *s = 0xFF000000;
     28             }
     29         }
     30     }
     31 }
     32 
     33 static void setTypeface(SkPaint* paint, const char name[], SkFontStyle style) {
     34     sk_tool_utils::set_portable_typeface(paint, name, style);
     35 }
     36 
     37 class DownsampleBitmapGM : public skiagm::GM {
     38 public:
     39     SkBitmap    fBM;
     40     SkString    fName;
     41     bool        fBitmapMade;
     42     SkFilterQuality fFilterQuality;
     43 
     44     DownsampleBitmapGM(SkFilterQuality filterQuality)
     45         : fFilterQuality(filterQuality)
     46     {
     47         this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
     48         fBitmapMade = false;
     49     }
     50 
     51     const char* filterQualityToString() {
     52         static const char *filterQualityNames[] = {
     53             "none", "low", "medium", "high"
     54         };
     55         return filterQualityNames[fFilterQuality];
     56     }
     57 
     58 protected:
     59 
     60     SkString onShortName() override {
     61         return fName;
     62     }
     63 
     64     SkISize onISize() override {
     65         make_bitmap_wrapper();
     66         return SkISize::Make(fBM.width(), 4 * fBM.height());
     67     }
     68 
     69     void make_bitmap_wrapper() {
     70         if (!fBitmapMade) {
     71             fBitmapMade = true;
     72             make_bitmap();
     73         }
     74     }
     75 
     76     virtual void make_bitmap() = 0;
     77 
     78     void onDraw(SkCanvas* canvas) override {
     79         make_bitmap_wrapper();
     80 
     81         int curY = 0;
     82         int curHeight;
     83         float curScale = 1;
     84         do {
     85 
     86             SkMatrix matrix;
     87             matrix.setScale( curScale, curScale );
     88 
     89             SkPaint paint;
     90             paint.setFilterQuality(fFilterQuality);
     91 
     92             canvas->save();
     93             canvas->translate(0, (SkScalar)curY);
     94             canvas->concat(matrix);
     95             canvas->drawBitmap(fBM, 0, 0, &paint);
     96             canvas->restore();
     97 
     98             curHeight = (int) (fBM.height() * curScale + 2);
     99             curY += curHeight;
    100             curScale *= 0.75f;
    101         } while (curHeight >= 2 && curY < 4*fBM.height());
    102     }
    103 
    104 private:
    105     typedef skiagm::GM INHERITED;
    106 };
    107 
    108 class DownsampleBitmapTextGM: public DownsampleBitmapGM {
    109   public:
    110       DownsampleBitmapTextGM(float textSize, SkFilterQuality filterQuality)
    111       : INHERITED(filterQuality), fTextSize(textSize)
    112         {
    113             fName.printf("downsamplebitmap_text_%s_%.2fpt", this->filterQualityToString(), fTextSize);
    114         }
    115 
    116   protected:
    117       float fTextSize;
    118 
    119       void make_bitmap() override {
    120           fBM.allocN32Pixels(int(fTextSize * 8), int(fTextSize * 6));
    121           SkCanvas canvas(fBM);
    122           canvas.drawColor(SK_ColorWHITE);
    123 
    124           SkPaint paint;
    125           paint.setAntiAlias(true);
    126           paint.setSubpixelText(true);
    127           paint.setTextSize(fTextSize);
    128 
    129           setTypeface(&paint, "serif", SkFontStyle());
    130           canvas.drawString("Hamburgefons", fTextSize/2, 1.2f*fTextSize, paint);
    131           setTypeface(&paint, "serif", SkFontStyle::FromOldStyle(SkTypeface::kBold));
    132           canvas.drawString("Hamburgefons", fTextSize/2, 2.4f*fTextSize, paint);
    133           setTypeface(&paint, "serif", SkFontStyle::FromOldStyle(SkTypeface::kItalic));
    134           canvas.drawString("Hamburgefons", fTextSize/2, 3.6f*fTextSize, paint);
    135           setTypeface(&paint, "serif", SkFontStyle::FromOldStyle(SkTypeface::kBoldItalic));
    136           canvas.drawString("Hamburgefons", fTextSize/2, 4.8f*fTextSize, paint);
    137       }
    138   private:
    139       typedef DownsampleBitmapGM INHERITED;
    140 };
    141 
    142 class DownsampleBitmapCheckerboardGM: public DownsampleBitmapGM {
    143   public:
    144       DownsampleBitmapCheckerboardGM(int size, int numChecks, SkFilterQuality filterQuality)
    145       : INHERITED(filterQuality), fSize(size), fNumChecks(numChecks)
    146         {
    147             fName.printf("downsamplebitmap_checkerboard_%s_%d_%d", this->filterQualityToString(), fSize, fNumChecks);
    148         }
    149 
    150   protected:
    151       int fSize;
    152       int fNumChecks;
    153 
    154       void make_bitmap() override {
    155           make_checker(&fBM, fSize, fNumChecks);
    156       }
    157   private:
    158       typedef DownsampleBitmapGM INHERITED;
    159 };
    160 
    161 class DownsampleBitmapImageGM: public DownsampleBitmapGM {
    162   public:
    163       DownsampleBitmapImageGM(const char filename[], SkFilterQuality filterQuality)
    164       : INHERITED(filterQuality), fFilename(filename)
    165         {
    166             fName.printf("downsamplebitmap_image_%s_%s", this->filterQualityToString(), filename);
    167         }
    168 
    169   protected:
    170       SkString fFilename;
    171       int fSize;
    172 
    173       void make_bitmap() override {
    174         if (!GetResourceAsBitmap(fFilename.c_str(), &fBM)) {
    175             fBM.allocN32Pixels(1, 1);
    176             fBM.eraseARGB(255, 255, 0 , 0); // red == bad
    177         }
    178         fSize = fBM.height();
    179       }
    180   private:
    181       typedef DownsampleBitmapGM INHERITED;
    182 };
    183 
    184 DEF_GM( return new DownsampleBitmapTextGM(72, kHigh_SkFilterQuality); )
    185 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, kHigh_SkFilterQuality); )
    186 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", kHigh_SkFilterQuality); )
    187 
    188 DEF_GM( return new DownsampleBitmapTextGM(72, kMedium_SkFilterQuality); )
    189 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, kMedium_SkFilterQuality); )
    190 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", kMedium_SkFilterQuality); )
    191 
    192 DEF_GM( return new DownsampleBitmapTextGM(72, kLow_SkFilterQuality); )
    193 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, kLow_SkFilterQuality); )
    194 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", kLow_SkFilterQuality); )
    195 
    196 DEF_GM( return new DownsampleBitmapTextGM(72, kNone_SkFilterQuality); )
    197 DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, kNone_SkFilterQuality); )
    198 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", kNone_SkFilterQuality); )
    199