lib/gdi/gpixmap.cpp

   1 #include <lib/gdi/gpixmap.h>
   2 #include <lib/gdi/region.h>
   3
   4 DEFINE_REF(gFont);
   5
   6 gLookup::gLookup()
   7         :size(0), lookup(0)
   8 {
   9 }
  10
  11 gLookup::gLookup(int size, const gPalette &pal, const gRGB &start, const gRGB &end)
  12         :size(0), lookup(0)
  13 {
  14         build(size, pal, start, end);
  15 }
  16
  17 void gLookup::build(int _size, const gPalette &pal, const gRGB &start, const gRGB &end)
  18 {
  19         if (lookup)
  20         {
  21                 delete [] lookup;
  22                 lookup=0;
  23                 size=0;
  24         }
  25         size=_size;
  26         if (!size)
  27                 return;
  28         lookup=new gColor[size];
  29
  30         for (int i=0; i<size; i++)
  31         {
  32                 gRGB col;
  33                 if (i)
  34                 {
  35                         int rdiff=-start.r+end.r;
  36                         int gdiff=-start.g+end.g;
  37                         int bdiff=-start.b+end.b;
  38                         int adiff=-start.a+end.a;
  39                         rdiff*=i; rdiff/=(size-1);
  40                         gdiff*=i; gdiff/=(size-1);
  41                         bdiff*=i; bdiff/=(size-1);
  42                         adiff*=i; adiff/=(size-1);
  43                         col.r=start.r+rdiff;
  44                         col.g=start.g+gdiff;
  45                         col.b=start.b+bdiff;
  46                         col.a=start.a+adiff;
  47                 } else
  48                         col=start;
  49                 lookup[i]=pal.findColor(col);
  50         }
  51 }
  52
  53 gSurface::~gSurface()
  54 {
  55 }
  56
  57 gSurfaceSystem::gSurfaceSystem(eSize size, int _bpp)
  58 {
  59         x=size.width();
  60         y=size.height();
  61         bpp=_bpp;
  62         switch (bpp)
  63         {
  64         case 8:
  65                 bypp=1;
  66                 break;
  67         case 15:
  68         case 16:
  69                 bypp=2;
  70                 break;
  71         case 24:                // never use 24bit mode
  72         case 32:
  73                 bypp=4;
  74                 break;
  75         default:
  76                 bypp=(bpp+7)/8;
  77         }
  78         stride=x*bypp;
  79         if (bpp==8)
  80         {
  81                 clut.colors=256;
  82                 clut.data=new gRGB[clut.colors];
  83         } else
  84         {
  85                 clut.colors=0;
  86                 clut.data=0;
  87         }
  88         data=malloc(x*y*bypp);
  89 }
  90
  91 gSurfaceSystem::~gSurfaceSystem()
  92 {
  93         free(data);
  94         delete[] clut.data;
  95 }
  96
  97 gPixmap *gPixmap::lock()
  98 {
  99         contentlock.lock(1);
 100         return this;
 101 }
 102
 103 void gPixmap::unlock()
 104 {
 105         contentlock.unlock(1);
 106 }
 107
 108 void gPixmap::fill(const gRegion &region, const gColor &color)
 109 {
 110         int i;
 111         for (i=0; i<region.rects.size(); ++i)
 112         {
 113                 const eRect &area = region.rects[i];
 114                 if ((area.height()<=0) || (area.width()<=0))
 115                         continue;
 116                 if (surface->bpp == 8)
 117                 {
 118                         for (int y=area.top(); y<area.bottom(); y++)
 119                                 memset(((__u8*)surface->data)+y*surface->stride+area.left(), color.color, area.width());
 120                 } else if (surface->bpp == 32)
 121                         for (int y=area.top(); y<area.bottom(); y++)
 122                         {
 123                                 __u32 *dst=(__u32*)(((__u8*)surface->data)+y*surface->stride+area.left()*surface->bypp);
 124                                 int x=area.width();
 125                                 __u32 col;
 126
 127                                 if (surface->clut.data && color < surface->clut.colors)
 128                                         col=(surface->clut.data[color].a<<24)|(surface->clut.data[color].r<<16)|(surface->clut.data[color].g<<8)|(surface->clut.data[color].b);
 129                                 else
 130                                         col=0x10101*color;
 131                                 col^=0xFF000000;
 132                                 while (x--)
 133                                         *dst++=col;
 134                         }
 135                 else
 136                         eWarning("couldn't fill %d bpp", surface->bpp);
 137         }
 138 }
 139
 140 void gPixmap::blit(const gPixmap &src, ePoint pos, const gRegion &clip, int flag)
 141 {
 142         for (int i=0; i<clip.rects.size(); ++i)
 143         {
 144                 eRect area=eRect(pos, src.getSize());
 145                 area&=clip.rects[i];
 146                 area&=eRect(ePoint(0, 0), getSize());
 147                 if ((area.width()<0) || (area.height()<0))
 148                         continue;
 149
 150                 eRect srcarea=area;
 151                 srcarea.moveBy(-pos.x(), -pos.y());
 152
 153                 if ((surface->bpp == 8) && (src.surface->bpp==8))
 154                 {
 155                         __u8 *srcptr=(__u8*)src.surface->data;
 156                         __u8 *dstptr=(__u8*)surface->data;
 157
 158                         srcptr+=srcarea.left()*surface->bypp+srcarea.top()*src.surface->stride;
 159                         dstptr+=area.left()*surface->bypp+area.top()*surface->stride;
 160                         for (int y=0; y<area.height(); y++)
 161                         {
 162                                 if (flag & blitAlphaTest)
 163                                 {
 164                       // no real alphatest yet
 165                                         int width=area.width();
 166                                         unsigned char *src=(unsigned char*)srcptr;
 167                                         unsigned char *dst=(unsigned char*)dstptr;
 168                                                 // use duff's device here!
 169                                         while (width--)
 170                                         {
 171                                                 if (!*src)
 172                                                 {
 173                                                         src++;
 174                                                         dst++;
 175                                                 } else
 176                                                         *dst++=*src++;
 177                                         }
 178                                 } else
 179                                         memcpy(dstptr, srcptr, area.width()*surface->bypp);
 180                                 srcptr+=src.surface->stride;
 181                                 dstptr+=surface->stride;
 182                         }
 183                 } else if ((surface->bpp == 32) && (src.surface->bpp==8))
 184                 {
 185                         __u8 *srcptr=(__u8*)src.surface->data;
 186                         __u8 *dstptr=(__u8*)surface->data; // !!
 187                         __u32 pal[256];
 188
 189                         for (int i=0; i<256; ++i)
 190                         {
 191                                 if (src.surface->clut.data && (i<src.surface->clut.colors))
 192                                         pal[i]=(src.surface->clut.data[i].a<<24)|(src.surface->clut.data[i].r<<16)|(src.surface->clut.data[i].g<<8)|(src.surface->clut.data[i].b);
 193                                 else
 194                                         pal[i]=0x010101*i;
 195                                 pal[i]^=0xFF000000;
 196                         }
 197
 198                         srcptr+=srcarea.left()*surface->bypp+srcarea.top()*src.surface->stride;
 199                         dstptr+=area.left()*surface->bypp+area.top()*surface->stride;
 200                         for (int y=0; y<area.height(); y++)
 201                         {
 202                                 if (flag & blitAlphaTest)
 203                                 {
 204                       // no real alphatest yet
 205                                         int width=area.width();
 206                                         unsigned char *src=(unsigned char*)srcptr;
 207                                         __u32 *dst=(__u32*)dstptr;
 208                                                 // use duff's device here!
 209                                         while (width--)
 210                                         {
 211                                                 if (!*src)
 212                                                 {
 213                                                         src++;
 214                                                         dst++;
 215                                                 } else
 216                                                         *dst++=pal[*src++];
 217                                         }
 218                                 } else
 219                                 {
 220                                         int width=area.width();
 221                                         unsigned char *src=(unsigned char*)srcptr;
 222                                         __u32 *dst=(__u32*)dstptr;
 223                                         while (width--)
 224                                                 *dst++=pal[*src++];
 225                                 }
 226                                 srcptr+=src.surface->stride;
 227                                 dstptr+=surface->stride;
 228                         }
 229                 } else
 230                         eFatal("cannot blit %dbpp from %dbpp", surface->bpp, src.surface->bpp);
 231         }
 232 }
 233
 234 void gPixmap::mergePalette(const gPixmap &target)
 235 {
 236         if ((!surface->clut.colors) || (!target.surface->clut.colors))
 237                 return;
 238         gColor *lookup=new gColor[surface->clut.colors];
 239
 240         for (int i=0; i<surface->clut.colors; i++)
 241                 lookup[i].color=target.surface->clut.findColor(surface->clut.data[i]);
 242
 243         delete [] surface->clut.data;
 244         surface->clut.colors=target.surface->clut.colors;
 245         surface->clut.data=new gRGB[surface->clut.colors];
 246         memcpy(surface->clut.data, target.surface->clut.data, sizeof(gRGB)*surface->clut.colors);
 247
 248         __u8 *dstptr=(__u8*)surface->data;
 249
 250         for (int ay=0; ay<surface->y; ay++)
 251         {
 252                 for (int ax=0; ax<surface->x; ax++)
 253                         dstptr[ax]=lookup[dstptr[ax]];
 254                 dstptr+=surface->stride;
 255         }
 256
 257         delete [] lookup;
 258 }
 259
 260 static inline int sgn(int a)
 261 {
 262         if (a < 0)
 263                 return -1;
 264         else if (!a)
 265                 return 0;
 266         else
 267                 return 1;
 268 }
 269
 270 void gPixmap::line(const gRegion &clip, ePoint start, ePoint dst, gColor color)
 271 {
 272         __u8 *srf = (__u8*)surface->data;
 273         int stride = surface->stride;
 274
 275         if (clip.rects.empty())
 276                 return;
 277
 278         int xa = start.x(), ya = start.y(), xb = dst.x(), yb = dst.y();
 279         int dx, dy, x, y, s1, s2, e, temp, swap, i;
 280         dy=abs(yb-ya);
 281         dx=abs(xb-xa);
 282         s1=sgn(xb-xa);
 283         s2=sgn(yb-ya);
 284         x=xa;
 285         y=ya;
 286         if (dy>dx)
 287         {
 288                 temp=dx;
 289                 dx=dy;
 290                 dy=temp;
 291                 swap=1;
 292         } else
 293                 swap=0;
 294         e = 2*dy-dx;
 295         int lasthit = 0;
 296         for(i=1; i<=dx; i++)
 297         {
 298                                 /* i don't like this clipping loop, but the only */
 299                                 /* other choice i see is to calculate the intersections */
 300                                 /* before iterating through the pixels. */
 301
 302                                 /* one could optimize this because of the ordering */
 303                                 /* of the bands. */
 304
 305                 lasthit = 0;
 306                 int a = lasthit;
 307
 308                         /* if last pixel was invisble, first check bounding box */
 309                 if (a == -1)
 310                 {
 311                                 /* check if we just got into the bbox again */
 312                         if (clip.extends.contains(x, y))
 313                                 lasthit = a = 0;
 314                         else
 315                                 goto fail;
 316                 } else if (!clip.rects[a].contains(x, y))
 317                 {
 318                         do
 319                         {
 320                                 ++a;
 321                                 if (a == clip.rects.size())
 322                                         a = 0;
 323                                 if (a == lasthit)
 324                                 {
 325                                         goto fail;
 326                                         lasthit = -1;
 327                                 }
 328                         } while (!clip.rects[a].contains(x, y));
 329                         lasthit = a;
 330                 }
 331                 srf[y * stride + x] = color;
 332 fail:
 333                 while (e>=0)
 334                 {
 335                         if (swap==1) x+=s1;
 336                         else y+=s2;
 337                         e-=2*dx;
 338                 }
 339     if (swap==1)
 340         y+=s2;
 341                 else
 342                         x+=s1;
 343                 e+=2*dy;
 344         }
 345 }
 346
 347 gColor gPalette::findColor(const gRGB &rgb) const
 348 {
 349         int difference=1<<30, best_choice=0;
 350         for (int t=0; t<colors; t++)
 351         {
 352                 int ttd;
 353                 int td=(signed)(rgb.r-data[t].r); td*=td; td*=(255-data[t].a);
 354                 ttd=td;
 355                 if (ttd>=difference)
 356                         continue;
 357                 td=(signed)(rgb.g-data[t].g); td*=td; td*=(255-data[t].a);
 358                 ttd+=td;
 359                 if (ttd>=difference)
 360                         continue;
 361                 td=(signed)(rgb.b-data[t].b); td*=td; td*=(255-data[t].a);
 362                 ttd+=td;
 363                 if (ttd>=difference)
 364                         continue;
 365                 td=(signed)(rgb.a-data[t].a); td*=td; td*=255;
 366                 ttd+=td;
 367                 if (ttd>=difference)
 368                         continue;
 369                 difference=ttd;
 370                 best_choice=t;
 371         }
 372         return best_choice;
 373 }
 374
 375 DEFINE_REF(gPixmap);
 376
 377 gPixmap::~gPixmap()
 378 {
 379 }
 380
 381 gPixmap::gPixmap(gSurface *surface): surface(surface)
 382 {
 383 }
 384
 385 gPixmap::gPixmap(eSize size, int bpp)
 386 {
 387         surface = new gSurfaceSystem(size, bpp);
 388 }
 389