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      1 
      2 /*
      3  * Copyright 2011 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 #include "SampleCode.h"
      9 #include "SkView.h"
     10 #include "SkCanvas.h"
     11 #include "SkBlurMaskFilter.h"
     12 #include "SkPaint.h"
     13 #include "SkPath.h"
     14 #include "SkXfermode.h"
     15 #include "SkMatrix.h"
     16 #include "SkColor.h"
     17 #include "SkRandom.h"
     18 
     19 static void set2x3(SkMatrix* m, float a, float b, float c, float d, float e, float f) {
     20     m->reset();
     21     m->set(0, a);
     22     m->set(1, b);
     23     m->set(2, c);
     24     m->set(3, d);
     25     m->set(4, e);
     26     m->set(5, f);
     27 }
     28 
     29 static SkRandom gRand;
     30 static bool return_large;
     31 static bool return_undef;
     32 static bool quick;
     33 static bool scale_large;
     34 static int scval = 1;
     35 static float transval = 0;
     36 
     37 static int R(float x) {
     38   return (int)floor(SkScalarToFloat(gRand.nextUScalar1()) * x);
     39 }
     40 
     41 #if defined _WIN32
     42 #pragma warning ( push )
     43 // we are intentionally causing an overflow here
     44 //      (warning C4756: overflow in constant arithmetic)
     45 #pragma warning ( disable : 4756 )
     46 #endif
     47 
     48 static float huge() {
     49     double d = 1e100;
     50     float f = (float)d;
     51     return f;
     52 }
     53 
     54 #if defined _WIN32
     55 #pragma warning ( pop )
     56 #endif
     57 
     58 static float make_number() {
     59   float v = 0;
     60   int sel;
     61 
     62   if (return_large == true && R(3) == 1) {
     63       sel = R(6);
     64   } else {
     65       sel = R(4);
     66   }
     67 
     68   if (return_undef == false && sel == 0) {
     69       sel = 1;
     70   }
     71 
     72   if (R(2) == 1) {
     73       v = (float)R(100);
     74   } else {
     75 
     76       switch (sel) {
     77         case 0: break;
     78         case 1: v = 0; break;
     79         case 2: v = 0.000001f; break;
     80         case 3: v = 10000; break;
     81         case 4: v = 2000000000; break;
     82         case 5: v = huge(); break;
     83       }
     84 
     85   }
     86 
     87   if (R(4) == 1) {
     88       v = -v;
     89   }
     90 
     91   return v;
     92 }
     93 
     94 static SkColor make_color() {
     95   if (R(2) == 1) return 0xFFC0F0A0; else return 0xFF000090;
     96 }
     97 
     98 
     99 static SkColor make_fill() {
    100 #if 0
    101   int sel;
    102 
    103   if (quick == true) sel = 0; else sel = R(6);
    104 
    105   switch (sel) {
    106 
    107     case 0:
    108     case 1:
    109     case 2:
    110       return make_color();
    111       break;
    112 
    113     case 3:
    114       var r = ctx.createLinearGradient(make_number(),make_number(),make_number(),make_number());
    115       for (i=0;i<4;i++)
    116         r.addColorStop(make_number(),make_color());
    117       return r;
    118       break;
    119 
    120     case 4:
    121       var r = ctx.createRadialGradient(make_number(),make_number(),make_number(),make_number(),make_number(),make_number());
    122       for (i=0;i<4;i++)
    123         r.addColorStop(make_number(),make_color());
    124       return r;
    125       break;
    126 
    127     case 5:
    128       var r = ctx.createPattern(imgObj,"repeat");
    129       if (R(6) == 0)
    130         r.addColorStop(make_number(),make_color());
    131       return r;
    132       break;
    133   }
    134 #else
    135     return make_color();
    136 #endif
    137 }
    138 
    139 
    140 static void do_fuzz(SkCanvas* canvas) {
    141     SkPath path;
    142     SkPaint paint;
    143     paint.setAntiAlias(true);
    144 
    145   for (int i=0;i<100;i++) {
    146   switch (R(33)) {
    147 
    148     case 0:
    149           paint.setColor(make_fill());
    150       break;
    151 
    152     case 1:
    153       paint.setAlpha(gRand.nextU() & 0xFF);
    154       break;
    155 
    156       case 2: {
    157           SkXfermode::Mode mode;
    158           switch (R(3)) {
    159             case 0: mode = SkXfermode::kSrc_Mode; break;
    160             case 1: mode = SkXfermode::kXor_Mode; break;
    161             case 2:
    162             default:  // silence warning
    163               mode = SkXfermode::kSrcOver_Mode; break;
    164           }
    165           paint.setXfermodeMode(mode);
    166       }
    167       break;
    168 
    169     case 3:
    170       switch (R(2)) {
    171           case 0: paint.setStrokeCap(SkPaint::kRound_Cap); break;
    172         case 1: paint.setStrokeCap(SkPaint::kButt_Cap); break;
    173       }
    174       break;
    175 
    176     case 4:
    177       switch (R(2)) {
    178           case 0: paint.setStrokeJoin(SkPaint::kRound_Join); break;
    179         case 1: paint.setStrokeJoin(SkPaint::kMiter_Join); break;
    180       }
    181       break;
    182 
    183     case 5:
    184       paint.setStrokeWidth(make_number());
    185       break;
    186 
    187     case 6:
    188       paint.setStrokeMiter(make_number());
    189       break;
    190 
    191     case 7:
    192       if (quick == true) break;
    193           SkSafeUnref(paint.setMaskFilter(SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
    194                                                                    make_number())));
    195       break;
    196 
    197     case 8:
    198       if (quick == true) break;
    199       //ctx.shadowColor = make_fill();
    200       break;
    201 
    202     case 9:
    203       if (quick == true) break;
    204       //ctx.shadowOffsetX = make_number();
    205       //ctx.shadowOffsetY = make_number();
    206       break;
    207 
    208     case 10:
    209       canvas->restore();
    210       break;
    211 
    212     case 11:
    213       canvas->rotate(make_number());
    214       break;
    215 
    216     case 12:
    217       canvas->save();
    218       break;
    219 
    220     case 13:
    221       canvas->scale(-1,-1);
    222       break;
    223 
    224     case 14:
    225 
    226       if (quick == true) break;
    227 
    228       if (transval == 0) {
    229         transval = make_number();
    230         canvas->translate(transval,0);
    231       } else {
    232         canvas->translate(-transval,0);
    233         transval = 0;
    234       }
    235 
    236       break;
    237 
    238           case 15: {
    239               SkRect r;
    240               r.set(make_number(),make_number(),make_number(),make_number());
    241               SkPaint::Style s = paint.getStyle();
    242               paint.setStyle(SkPaint::kFill_Style);
    243               canvas->drawRect(r, paint);
    244               paint.setStyle(s);
    245               // clearrect
    246           } break;
    247 
    248     case 16:
    249       if (quick == true) break;
    250 //      ctx.drawImage(imgObj,make_number(),make_number(),make_number(),make_number(),make_number(),make_number(),make_number(),make_number());
    251       break;
    252 
    253           case 17: {
    254           SkRect r;
    255           r.set(make_number(),make_number(),make_number(),make_number());
    256               SkPaint::Style s = paint.getStyle();
    257               paint.setStyle(SkPaint::kFill_Style);
    258           canvas->drawRect(r, paint);
    259               paint.setStyle(s);
    260           } break;
    261 
    262     case 18:
    263           path.reset();
    264       break;
    265 
    266     case 19:
    267       // ctx.clip() is evil.
    268       break;
    269 
    270     case 20:
    271           path.close();
    272       break;
    273 
    274           case 21: {
    275           SkPaint::Style s = paint.getStyle();
    276           paint.setStyle(SkPaint::kFill_Style);
    277           canvas->drawPath(path, paint);
    278           paint.setStyle(s);
    279           } break;
    280 
    281           case 22: {
    282               SkPaint::Style s = paint.getStyle();
    283               paint.setStyle(SkPaint::kFill_Style);
    284               canvas->drawPath(path, paint);
    285               paint.setStyle(s);
    286           } break;
    287 
    288           case 23: {
    289               SkRect r;
    290               r.set(make_number(),make_number(),make_number(),make_number());
    291               SkPaint::Style s = paint.getStyle();
    292               paint.setStyle(SkPaint::kStroke_Style);
    293               canvas->drawRect(r, paint);
    294               paint.setStyle(s);
    295           } break;
    296 
    297     case 24:
    298       if (quick == true) break;
    299       //ctx.arc(make_number(),make_number(),make_number(),make_number(),make_number(),true);
    300       break;
    301 
    302     case 25:
    303       if (quick == true) break;
    304       //ctx.arcTo(make_number(),make_number(),make_number(),make_number(),make_number());
    305       break;
    306 
    307     case 26:
    308       if (quick == true) break;
    309       //ctx.bezierCurveTo(make_number(),make_number(),make_number(),make_number(),make_number(),make_number());
    310       break;
    311 
    312     case 27:
    313       path.lineTo(make_number(),make_number());
    314       break;
    315 
    316     case 28:
    317       path.moveTo(make_number(),make_number());
    318       break;
    319 
    320     case 29:
    321       if (quick == true) break;
    322       path.quadTo(make_number(),make_number(),make_number(),make_number());
    323       break;
    324 
    325           case 30: {
    326       if (quick == true) break;
    327               SkMatrix matrix;
    328       set2x3(&matrix, make_number(),make_number(),make_number(),make_number(),make_number(),make_number());
    329               canvas->concat(matrix);
    330           } break;
    331 
    332           case 31: {
    333       if (quick == true) break;
    334           SkMatrix matrix;
    335           set2x3(&matrix, make_number(),make_number(),make_number(),make_number(),make_number(),make_number());
    336           canvas->setMatrix(matrix);
    337           } break;
    338 
    339     case 32:
    340 
    341       if (scale_large == true) {
    342 
    343         switch (scval) {
    344           case 0: canvas->scale(-1000000000,1);
    345                   canvas->scale(-1000000000,1);
    346                   scval = 1; break;
    347           case 1: canvas->scale(-.000000001f,1); scval = 2; break;
    348           case 2: canvas->scale(-.000000001f,1); scval = 0; break;
    349         }
    350 
    351       }
    352 
    353       break;
    354 
    355 
    356 
    357   }
    358   }
    359 
    360 }
    361 
    362 //////////////////////////////////////////////////////////////////////////////
    363 
    364 class FuzzView : public SampleView {
    365 public:
    366     FuzzView() {
    367         this->setBGColor(0xFFDDDDDD);
    368     }
    369 
    370 protected:
    371     // overrides from SkEventSink
    372     virtual bool onQuery(SkEvent* evt) {
    373         if (SampleCode::TitleQ(*evt)) {
    374             SampleCode::TitleR(evt, "Fuzzer");
    375             return true;
    376         }
    377         return this->INHERITED::onQuery(evt);
    378     }
    379 
    380     void drawBG(SkCanvas* canvas) {
    381         canvas->drawColor(0xFFDDDDDD);
    382     }
    383 
    384     virtual void onDrawContent(SkCanvas* canvas) {
    385         do_fuzz(canvas);
    386         this->inval(nullptr);
    387     }
    388 
    389 private:
    390     typedef SkView INHERITED;
    391 };
    392 
    393 //////////////////////////////////////////////////////////////////////////////
    394 
    395 static SkView* MyFactory() { return new FuzzView; }
    396 static SkViewRegister reg(MyFactory);
    397