gm/filterbitmap.cpp

   1 /*
   2  * Copyright 2011 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 "SkStream.h"
  14 #include "SkTypeface.h"
  15
  16 static void setTypeface(SkPaint* paint, const char name[], SkFontStyle style) {
  17     sk_tool_utils::set_portable_typeface(paint, name, style);
  18 }
  19
  20 static SkSize computeSize(const SkBitmap& bm, const SkMatrix& mat) {
  21     SkRect bounds = SkRect::MakeWH(SkIntToScalar(bm.width()),
  22                                    SkIntToScalar(bm.height()));
  23     mat.mapRect(&bounds);
  24     return SkSize::Make(bounds.width(), bounds.height());
  25 }
  26
  27 static void draw_cell(SkCanvas* canvas, const SkBitmap& bm, const SkMatrix& mat, SkScalar dx,
  28                       SkFilterQuality lvl) {
  29     SkPaint paint;
  30     paint.setFilterQuality(lvl);
  31
  32     SkAutoCanvasRestore acr(canvas, true);
  33     canvas->translate(dx, 0);
  34     canvas->concat(mat);
  35     canvas->drawBitmap(bm, 0, 0, &paint);
  36 }
  37
  38 static void draw_row(SkCanvas* canvas, const SkBitmap& bm, const SkMatrix& mat, SkScalar dx) {
  39     draw_cell(canvas, bm, mat, 0 * dx, kNone_SkFilterQuality);
  40     draw_cell(canvas, bm, mat, 1 * dx, kLow_SkFilterQuality);
  41     draw_cell(canvas, bm, mat, 2 * dx, kMedium_SkFilterQuality);
  42     draw_cell(canvas, bm, mat, 3 * dx, kHigh_SkFilterQuality);
  43 }
  44
  45 class FilterBitmapGM : public skiagm::GM {
  46     void onOnceBeforeDraw() override {
  47
  48         this->makeBitmap();
  49
  50         SkScalar cx = SkScalarHalf(fBM.width());
  51         SkScalar cy = SkScalarHalf(fBM.height());
  52         SkScalar scale = this->getScale();
  53
  54         // these two matrices use a scale factor configured by the subclass
  55         fMatrix[0].setScale(scale, scale);
  56         fMatrix[1].setRotate(30, cx, cy); fMatrix[1].postScale(scale, scale);
  57
  58         // up/down scaling mix
  59         fMatrix[2].setScale(0.7f, 1.05f);
  60     }
  61
  62 public:
  63     SkBitmap    fBM;
  64     SkMatrix    fMatrix[3];
  65     SkString    fName;
  66
  67     FilterBitmapGM()
  68     {
  69         this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
  70     }
  71
  72 protected:
  73
  74     SkString onShortName() override {
  75         return fName;
  76     }
  77
  78     SkISize onISize() override {
  79         return SkISize::Make(1024, 768);
  80     }
  81
  82     virtual void makeBitmap() = 0;
  83     virtual SkScalar getScale() = 0;
  84
  85     void onDraw(SkCanvas* canvas) override {
  86
  87         canvas->translate(10, 10);
  88         for (size_t i = 0; i < SK_ARRAY_COUNT(fMatrix); ++i) {
  89             SkSize size = computeSize(fBM, fMatrix[i]);
  90             size.fWidth += 20;
  91             size.fHeight += 20;
  92
  93             draw_row(canvas, fBM, fMatrix[i], size.fWidth);
  94             canvas->translate(0, size.fHeight);
  95         }
  96     }
  97
  98 private:
  99     typedef skiagm::GM INHERITED;
 100 };
 101
 102 class FilterBitmapTextGM: public FilterBitmapGM {
 103   public:
 104       FilterBitmapTextGM(float textSize)
 105       : fTextSize(textSize)
 106         {
 107             fName.printf("filterbitmap_text_%.2fpt", fTextSize);
 108         }
 109
 110   protected:
 111       float fTextSize;
 112
 113       SkScalar getScale() override {
 114           return 32.f/fTextSize;
 115       }
 116
 117       void makeBitmap() override {
 118           fBM.allocN32Pixels(int(fTextSize * 8), int(fTextSize * 6));
 119           SkCanvas canvas(fBM);
 120           canvas.drawColor(SK_ColorWHITE);
 121
 122           SkPaint paint;
 123           paint.setAntiAlias(true);
 124           paint.setSubpixelText(true);
 125           paint.setTextSize(fTextSize);
 126
 127           setTypeface(&paint, "serif", SkFontStyle());
 128           canvas.drawString("Hamburgefons", fTextSize/2, 1.2f*fTextSize, paint);
 129           setTypeface(&paint, "serif", SkFontStyle::FromOldStyle(SkTypeface::kBold));
 130           canvas.drawString("Hamburgefons", fTextSize/2, 2.4f*fTextSize, paint);
 131           setTypeface(&paint, "serif", SkFontStyle::FromOldStyle(SkTypeface::kItalic));
 132           canvas.drawString("Hamburgefons", fTextSize/2, 3.6f*fTextSize, paint);
 133           setTypeface(&paint, "serif", SkFontStyle::FromOldStyle(SkTypeface::kBoldItalic));
 134           canvas.drawString("Hamburgefons", fTextSize/2, 4.8f*fTextSize, paint);
 135       }
 136   private:
 137       typedef FilterBitmapGM INHERITED;
 138 };
 139
 140 class FilterBitmapCheckerboardGM: public FilterBitmapGM {
 141 public:
 142     FilterBitmapCheckerboardGM(int size, int num_checks, bool convertToG8 = false)
 143         : fSize(size), fNumChecks(num_checks), fConvertToG8(convertToG8)
 144     {
 145         fName.printf("filterbitmap_checkerboard_%d_%d%s",
 146                      fSize, fNumChecks, convertToG8 ? "_g8" : "");
 147     }
 148
 149   protected:
 150       int fSize;
 151       int fNumChecks;
 152
 153       SkScalar getScale() override {
 154           return 192.f/fSize;
 155       }
 156
 157       void makeBitmap() override {
 158           fBM.allocN32Pixels(fSize, fSize);
 159           for (int y = 0; y < fSize; y ++) {
 160               for (int x = 0; x < fSize; x ++) {
 161                   SkPMColor* s = fBM.getAddr32(x, y);
 162                   int cx = (x * fNumChecks) / fSize;
 163                   int cy = (y * fNumChecks) / fSize;
 164                   if ((cx+cy)%2) {
 165                       *s = 0xFFFFFFFF;
 166                   } else {
 167                       *s = 0xFF000000;
 168                   }
 169               }
 170           }
 171           if (fConvertToG8) {
 172               SkBitmap tmp;
 173               sk_tool_utils::copy_to_g8(&tmp, fBM);
 174               fBM = tmp;
 175           }
 176       }
 177 private:
 178     const bool fConvertToG8;
 179     typedef FilterBitmapGM INHERITED;
 180 };
 181
 182 class FilterBitmapImageGM: public FilterBitmapGM {
 183 public:
 184     FilterBitmapImageGM(const char filename[], bool convertToG8 = false)
 185         : fFilename(filename), fConvertToG8(convertToG8)
 186     {
 187         fName.printf("filterbitmap_image_%s%s", filename, convertToG8 ? "_g8" : "");
 188     }
 189
 190 protected:
 191       SkString fFilename;
 192       int fSize;
 193
 194       SkScalar getScale() override {
 195           return 192.f/fSize;
 196       }
 197
 198       void makeBitmap() override {
 199         if (!GetResourceAsBitmap(fFilename.c_str(), &fBM)) {
 200             fBM.allocN32Pixels(1, 1);
 201             fBM.eraseARGB(255, 255, 0 , 0); // red == bad
 202         }
 203         fSize = fBM.height();
 204
 205         if (fConvertToG8) {
 206             SkBitmap tmp;
 207             sk_tool_utils::copy_to_g8(&tmp, fBM);
 208             fBM = tmp;
 209         }
 210       }
 211 private:
 212     const bool fConvertToG8;
 213     typedef FilterBitmapGM INHERITED;
 214 };
 215
 216 //////////////////////////////////////////////////////////////////////////////
 217
 218 DEF_GM( return new FilterBitmapTextGM(3); )
 219 DEF_GM( return new FilterBitmapTextGM(7); )
 220 DEF_GM( return new FilterBitmapTextGM(10); )
 221 DEF_GM( return new FilterBitmapCheckerboardGM(4,4); )
 222 DEF_GM( return new FilterBitmapCheckerboardGM(32,32); )
 223 DEF_GM( return new FilterBitmapCheckerboardGM(32,32, true); )
 224 DEF_GM( return new FilterBitmapCheckerboardGM(32,8); )
 225 DEF_GM( return new FilterBitmapCheckerboardGM(32,2); )
 226 DEF_GM( return new FilterBitmapCheckerboardGM(192,192); )
 227 DEF_GM( return new FilterBitmapImageGM("mandrill_16.png"); )
 228 DEF_GM( return new FilterBitmapImageGM("mandrill_32.png"); )
 229 DEF_GM( return new FilterBitmapImageGM("mandrill_64.png"); )
 230 DEF_GM( return new FilterBitmapImageGM("mandrill_64.png", true); )
 231 DEF_GM( return new FilterBitmapImageGM("mandrill_128.png"); )
 232 DEF_GM( return new FilterBitmapImageGM("mandrill_256.png"); )
 233 DEF_GM( return new FilterBitmapImageGM("mandrill_512.png"); )
 234 DEF_GM( return new FilterBitmapImageGM("color_wheel.png"); )