lib/gdi/gpixmap.cpp

   1 #include <lib/gdi/gpixmap.h>
   2 #include <lib/gdi/region.h>
   3 #include <lib/gdi/accel.h>
   4
   5 gLookup::gLookup()
   6         :size(0), lookup(0)
   7 {
   8 }
   9
  10 gLookup::gLookup(int size, const gPalette &pal, const gRGB &start, const gRGB &end)
  11         :size(0), lookup(0)
  12 {
  13         build(size, pal, start, end);
  14 }
  15
  16 void gLookup::build(int _size, const gPalette &pal, const gRGB &start, const gRGB &end)
  17 {
  18         if (lookup)
  19         {
  20                 delete [] lookup;
  21                 lookup=0;
  22                 size=0;
  23         }
  24         size=_size;
  25         if (!size)
  26                 return;
  27         lookup=new gColor[size];
  28
  29         for (int i=0; i<size; i++)
  30         {
  31                 gRGB col;
  32                 if (i)
  33                 {
  34                         int rdiff=-start.r+end.r;
  35                         int gdiff=-start.g+end.g;
  36                         int bdiff=-start.b+end.b;
  37                         int adiff=-start.a+end.a;
  38                         rdiff*=i; rdiff/=(size-1);
  39                         gdiff*=i; gdiff/=(size-1);
  40                         bdiff*=i; bdiff/=(size-1);
  41                         adiff*=i; adiff/=(size-1);
  42                         col.r=start.r+rdiff;
  43                         col.g=start.g+gdiff;
  44                         col.b=start.b+bdiff;
  45                         col.a=start.a+adiff;
  46                 } else
  47                         col=start;
  48                 lookup[i]=pal.findColor(col);
  49         }
  50 }
  51
  52 gSurface::gSurface()
  53 {
  54         x = 0;
  55         y = 0;
  56         bpp = 0;
  57         bypp = 0;
  58         stride = 0;
  59         data = 0;
  60         data_phys = 0;
  61         clut.colors = 0;
  62         clut.data = 0;
  63         type = 0;
  64 }
  65
  66 gSurface::gSurface(eSize size, int _bpp, int accel)
  67 {
  68         x = size.width();
  69         y = size.height();
  70         bpp = _bpp;
  71
  72         switch (bpp)
  73         {
  74         case 8:
  75                 bypp = 1;
  76                 break;
  77         case 15:
  78         case 16:
  79                 bypp = 2;
  80                 break;
  81         case 24:                // never use 24bit mode
  82         case 32:
  83                 bypp = 4;
  84                 break;
  85         default:
  86                 bypp = (bpp+7)/8;
  87         }
  88
  89         stride = x*bypp;
  90
  91         data = 0;
  92         data_phys = 0;
  93
  94         if (accel)
  95         {
  96                 stride += 63;
  97                 stride &=~63;
  98
  99                 if (gAccel::getInstance())
 100                         eDebug("accel memory: %d", gAccel::getInstance()->accelAlloc(data, data_phys, y * stride));
 101                 else
 102                         eDebug("no accel available");
 103         }
 104
 105         clut.colors = 0;
 106         clut.data = 0;
 107
 108         if (!data)
 109                 data = malloc(y * stride);
 110
 111         type = 1;
 112 }
 113
 114 gSurface::~gSurface()
 115 {
 116         if (type)
 117         {
 118                 if (data_phys)
 119                         gAccel::getInstance()->accelFree(data_phys);
 120                 else
 121                         free(data);
 122
 123                 delete[] clut.data;
 124         }
 125 }
 126
 127 gPixmap *gPixmap::lock()
 128 {
 129         contentlock.lock(1);
 130         return this;
 131 }
 132
 133 void gPixmap::unlock()
 134 {
 135         contentlock.unlock(1);
 136 }
 137
 138 void gPixmap::fill(const gRegion &region, const gColor &color)
 139 {
 140         unsigned int i;
 141         for (i=0; i<region.rects.size(); ++i)
 142         {
 143                 const eRect &area = region.rects[i];
 144                 if ((area.height()<=0) || (area.width()<=0))
 145                         continue;
 146
 147                 if (surface->bpp == 8)
 148                 {
 149                         for (int y=area.top(); y<area.bottom(); y++)
 150                                 memset(((__u8*)surface->data)+y*surface->stride+area.left(), color.color, area.width());
 151                 } else if (surface->bpp == 32)
 152                 {
 153                         __u32 col;
 154
 155                         if (surface->clut.data && color < surface->clut.colors)
 156                                 col=(surface->clut.data[color].a<<24)|(surface->clut.data[color].r<<16)|(surface->clut.data[color].g<<8)|(surface->clut.data[color].b);
 157                         else
 158                                 col=0x10101*color;
 159
 160                         col^=0xFF000000;
 161
 162                         if (surface->data_phys && gAccel::getInstance())
 163                                 if (!gAccel::getInstance()->fill(surface,  area, col))
 164                                         continue;
 165
 166                         for (int y=area.top(); y<area.bottom(); y++)
 167                         {
 168                                 __u32 *dst=(__u32*)(((__u8*)surface->data)+y*surface->stride+area.left()*surface->bypp);
 169                                 int x=area.width();
 170                                 while (x--)
 171                                         *dst++=col;
 172                         }
 173                 }       else
 174                         eWarning("couldn't fill %d bpp", surface->bpp);
 175         }
 176 }
 177
 178 void gPixmap::blit(const gPixmap &src, ePoint pos, const gRegion &clip, int flag)
 179 {
 180         for (unsigned int i=0; i<clip.rects.size(); ++i)
 181         {
 182                 eRect area=eRect(pos, src.size());
 183
 184                 if (!(flag & blitAlphaTest))  // HACK !!
 185                         area&=clip.rects[i];
 186
 187                 area&=eRect(ePoint(0, 0), size());
 188                 if ((area.width()<0) || (area.height()<0))
 189                         continue;
 190
 191                 eRect srcarea=area;
 192                 srcarea.moveBy(-pos.x(), -pos.y());
 193
 194                 if ((surface->data_phys && src.surface->data_phys) && (gAccel::getInstance()))
 195                         if (!gAccel::getInstance()->blit(surface, src.surface, area.topLeft(), srcarea, flag))
 196                                 continue;
 197                 flag &= ~ blitAlphaBlend;
 198
 199                 if ((surface->bpp == 8) && (src.surface->bpp==8))
 200                 {
 201                         __u8 *srcptr=(__u8*)src.surface->data;
 202                         __u8 *dstptr=(__u8*)surface->data;
 203
 204                         srcptr+=srcarea.left()*src.surface->bypp+srcarea.top()*src.surface->stride;
 205                         dstptr+=area.left()*surface->bypp+area.top()*surface->stride;
 206                         for (int y=0; y<area.height(); y++)
 207                         {
 208                                 if (flag & blitAlphaTest)
 209                                 {
 210                       // no real alphatest yet
 211                                         int width=area.width();
 212                                         unsigned char *src=(unsigned char*)srcptr;
 213                                         unsigned char *dst=(unsigned char*)dstptr;
 214                                                 // use duff's device here!
 215                                         while (width--)
 216                                         {
 217                                                 if (!*src)
 218                                                 {
 219                                                         src++;
 220                                                         dst++;
 221                                                 } else
 222                                                         *dst++=*src++;
 223                                         }
 224                                 } else
 225                                         memcpy(dstptr, srcptr, area.width()*surface->bypp);
 226                                 srcptr+=src.surface->stride;
 227                                 dstptr+=surface->stride;
 228                         }
 229                 } else if ((surface->bpp == 32) && (src.surface->bpp==32))
 230                 {
 231                         __u32 *srcptr=(__u32*)src.surface->data;
 232                         __u32 *dstptr=(__u32*)surface->data;
 233
 234                         srcptr+=srcarea.left()+srcarea.top()*src.surface->stride/4;
 235                         dstptr+=area.left()+area.top()*surface->stride/4;
 236                         for (int y=0; y<area.height(); y++)
 237                         {
 238                                 if (flag & blitAlphaTest)
 239                                 {
 240                                         int width=area.width();
 241                                         unsigned long *src=(unsigned long*)srcptr;
 242                                         unsigned long *dst=(unsigned long*)dstptr;
 243
 244                                         while (width--)
 245                                         {
 246                                                 if (!((*src)&0xFF000000))
 247                                                 {
 248                                                         src++;
 249                                                         dst++;
 250                                                 } else
 251                                                         *dst++=*src++;
 252                                         }
 253                                 } else if (flag & blitAlphaBlend)
 254                                 {
 255                                         // uh oh. this is only until hardware accel is working.
 256
 257                                         int width=area.width();
 258                                                         // ARGB color space!
 259                                         unsigned char *src=(unsigned char*)srcptr;
 260                                         unsigned char *dst=(unsigned char*)dstptr;
 261
 262 #define BLEND(x, y, a) (y + ((x-y) * a)/256)
 263                                         while (width--)
 264                                         {
 265                                                 unsigned char sa = src[3];
 266                                                 unsigned char sr = src[2];
 267                                                 unsigned char sg = src[1];
 268                                                 unsigned char sb = src[0];
 269
 270                                                 unsigned char da = dst[3];
 271                                                 unsigned char dr = dst[2];
 272                                                 unsigned char dg = dst[1];
 273                                                 unsigned char db = dst[0];
 274
 275                                                 dst[3] = BLEND(0xFF, da, sa);
 276                                                 dst[2] = BLEND(sr, dr, sa);
 277                                                 dst[1] = BLEND(sg, dg, sa);
 278                                                 dst[0] = BLEND(sb, db, sa);
 279
 280                                                 src += 4; dst += 4;
 281                                         }
 282                                 } else
 283                                         memcpy(dstptr, srcptr, area.width()*surface->bypp);
 284                                 srcptr+=src.surface->stride/4;
 285                                 dstptr+=surface->stride/4;
 286                         }
 287                 } else if ((surface->bpp == 32) && (src.surface->bpp==8))
 288                 {
 289                         __u8 *srcptr=(__u8*)src.surface->data;
 290                         __u8 *dstptr=(__u8*)surface->data; // !!
 291                         __u32 pal[256];
 292
 293                         for (int i=0; i<256; ++i)
 294                         {
 295                                 if (src.surface->clut.data && (i<src.surface->clut.colors))
 296                                         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);
 297                                 else
 298                                         pal[i]=0x010101*i;
 299                                 pal[i]^=0xFF000000;
 300                         }
 301
 302                         srcptr+=srcarea.left()*src.surface->bypp+srcarea.top()*src.surface->stride;
 303                         dstptr+=area.left()*surface->bypp+area.top()*surface->stride;
 304                         for (int y=0; y<area.height(); y++)
 305                         {
 306                                 if (flag & blitAlphaTest)
 307                                 {
 308                       // no real alphatest yet
 309                                         int width=area.width();
 310                                         unsigned char *src=(unsigned char*)srcptr;
 311                                         __u32 *dst=(__u32*)dstptr;
 312                                                 // use duff's device here!
 313                                         while (width--)
 314                                         {
 315                                                 if (*src==0x01)
 316                                                 {
 317                                                         src++;
 318                                                         dst++;
 319                                                 } else
 320                                                         *dst++=pal[*src++];
 321                                         }
 322                                 } else
 323                                 {
 324                                         int width=area.width();
 325                                         unsigned char *src=(unsigned char*)srcptr;
 326                                         __u32 *dst=(__u32*)dstptr;
 327                                         while (width--)
 328                                                 *dst++=pal[*src++];
 329                                 }
 330                                 srcptr+=src.surface->stride;
 331                                 dstptr+=surface->stride;
 332                         }
 333                 } else
 334                         eFatal("cannot blit %dbpp from %dbpp", surface->bpp, src.surface->bpp);
 335         }
 336 }
 337
 338 void gPixmap::mergePalette(const gPixmap &target)
 339 {
 340         if ((!surface->clut.colors) || (!target.surface->clut.colors))
 341                 return;
 342
 343         gColor *lookup=new gColor[surface->clut.colors];
 344
 345         for (int i=0; i<surface->clut.colors; i++)
 346                 lookup[i].color=target.surface->clut.findColor(surface->clut.data[i]);
 347
 348         delete [] surface->clut.data;
 349         surface->clut.colors=target.surface->clut.colors;
 350         surface->clut.data=new gRGB[surface->clut.colors];
 351         memcpy(surface->clut.data, target.surface->clut.data, sizeof(gRGB)*surface->clut.colors);
 352
 353         __u8 *dstptr=(__u8*)surface->data;
 354
 355         for (int ay=0; ay<surface->y; ay++)
 356         {
 357                 for (int ax=0; ax<surface->x; ax++)
 358                         dstptr[ax]=lookup[dstptr[ax]];
 359                 dstptr+=surface->stride;
 360         }
 361
 362         delete [] lookup;
 363 }
 364
 365 static inline int sgn(int a)
 366 {
 367         if (a < 0)
 368                 return -1;
 369         else if (!a)
 370                 return 0;
 371         else
 372                 return 1;
 373 }
 374
 375 void gPixmap::line(const gRegion &clip, ePoint start, ePoint dst, gColor color)
 376 {
 377         __u8 *srf8 = 0;
 378         __u32 *srf32 = 0;
 379         int stride = surface->stride;
 380
 381         if (clip.rects.empty())
 382                 return;
 383
 384         __u32 col;
 385         if (surface->bpp == 8)
 386         {
 387                 srf8 = (__u8*)surface->data;
 388         } else if (surface->bpp == 32)
 389         {
 390                 srf32 = (__u32*)surface->data;
 391
 392                 if (surface->clut.data && color < surface->clut.colors)
 393                         col=(surface->clut.data[color].a<<24)|(surface->clut.data[color].r<<16)|(surface->clut.data[color].g<<8)|(surface->clut.data[color].b);
 394                 else
 395                         col=0x10101*color;
 396                 col^=0xFF000000;
 397         }
 398
 399         int xa = start.x(), ya = start.y(), xb = dst.x(), yb = dst.y();
 400         int dx, dy, x, y, s1, s2, e, temp, swap, i;
 401         dy=abs(yb-ya);
 402         dx=abs(xb-xa);
 403         s1=sgn(xb-xa);
 404         s2=sgn(yb-ya);
 405         x=xa;
 406         y=ya;
 407         if (dy>dx)
 408         {
 409                 temp=dx;
 410                 dx=dy;
 411                 dy=temp;
 412                 swap=1;
 413         } else
 414                 swap=0;
 415         e = 2*dy-dx;
 416
 417         int lasthit = 0;
 418         for(i=1; i<=dx; i++)
 419         {
 420                                 /* i don't like this clipping loop, but the only */
 421                                 /* other choice i see is to calculate the intersections */
 422                                 /* before iterating through the pixels. */
 423
 424                                 /* one could optimize this because of the ordering */
 425                                 /* of the bands. */
 426
 427                 lasthit = 0;
 428                 int a = lasthit;
 429
 430                         /* if last pixel was invisble, first check bounding box */
 431                 if (a == -1)
 432                 {
 433                                 /* check if we just got into the bbox again */
 434                         if (clip.extends.contains(x, y))
 435                                 lasthit = a = 0;
 436                         else
 437                                 goto fail;
 438                 } else if (!clip.rects[a].contains(x, y))
 439                 {
 440                         do
 441                         {
 442                                 ++a;
 443                                 if (a == clip.rects.size())
 444                                         a = 0;
 445                                 if (a == lasthit)
 446                                 {
 447                                         goto fail;
 448                                         lasthit = -1;
 449                                 }
 450                         } while (!clip.rects[a].contains(x, y));
 451                         lasthit = a;
 452                 }
 453
 454                 if (srf8)
 455                         srf8[y * stride + x] = color;
 456                 if (srf32)
 457                         srf32[y * stride/4 + x] = col;
 458 fail:
 459                 while (e>=0)
 460                 {
 461                         if (swap==1) x+=s1;
 462                         else y+=s2;
 463                         e-=2*dx;
 464                 }
 465     if (swap==1)
 466         y+=s2;
 467                 else
 468                         x+=s1;
 469                 e+=2*dy;
 470         }
 471 }
 472
 473 gColor gPalette::findColor(const gRGB &rgb) const
 474 {
 475                 /* grayscale? */
 476         if (!data)
 477                 return (rgb.r + rgb.g + rgb.b) / 3;
 478
 479         int difference=1<<30, best_choice=0;
 480         for (int t=0; t<colors; t++)
 481         {
 482                 int ttd;
 483                 int td=(signed)(rgb.r-data[t].r); td*=td; td*=(255-data[t].a);
 484                 ttd=td;
 485                 if (ttd>=difference)
 486                         continue;
 487                 td=(signed)(rgb.g-data[t].g); td*=td; td*=(255-data[t].a);
 488                 ttd+=td;
 489                 if (ttd>=difference)
 490                         continue;
 491                 td=(signed)(rgb.b-data[t].b); td*=td; td*=(255-data[t].a);
 492                 ttd+=td;
 493                 if (ttd>=difference)
 494                         continue;
 495                 td=(signed)(rgb.a-data[t].a); td*=td; td*=255;
 496                 ttd+=td;
 497                 if (ttd>=difference)
 498                         continue;
 499                 if (!ttd)
 500                         return t;
 501                 difference=ttd;
 502                 best_choice=t;
 503         }
 504         return best_choice;
 505 }
 506
 507 DEFINE_REF(gPixmap);
 508
 509 gPixmap::~gPixmap()
 510 {
 511 }
 512
 513 gPixmap::gPixmap(gSurface *surface): surface(surface)
 514 {
 515 }
 516
 517 gPixmap::gPixmap(eSize size, int bpp, int accel)
 518 {
 519         surface = new gSurface(size, bpp, accel);
 520 }
 521