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                 area&=clip.rects[i];
 184                 area&=eRect(ePoint(0, 0), size());
 185                 if ((area.width()<0) || (area.height()<0))
 186                         continue;
 187
 188                 eRect srcarea=area;
 189                 srcarea.moveBy(-pos.x(), -pos.y());
 190
 191                 if ((surface->data_phys && src.surface->data_phys) && (gAccel::getInstance()))
 192                         if (!gAccel::getInstance()->blit(surface, src.surface, area.topLeft(), srcarea, flag))
 193                                 continue;
 194                 flag &= ~ blitAlphaBlend;
 195
 196                 if ((surface->bpp == 8) && (src.surface->bpp==8))
 197                 {
 198                         __u8 *srcptr=(__u8*)src.surface->data;
 199                         __u8 *dstptr=(__u8*)surface->data;
 200
 201                         srcptr+=srcarea.left()*src.surface->bypp+srcarea.top()*src.surface->stride;
 202                         dstptr+=area.left()*surface->bypp+area.top()*surface->stride;
 203                         for (int y=0; y<area.height(); y++)
 204                         {
 205                                 if (flag & blitAlphaTest)
 206                                 {
 207                       // no real alphatest yet
 208                                         int width=area.width();
 209                                         unsigned char *src=(unsigned char*)srcptr;
 210                                         unsigned char *dst=(unsigned char*)dstptr;
 211                                                 // use duff's device here!
 212                                         while (width--)
 213                                         {
 214                                                 if (!*src)
 215                                                 {
 216                                                         src++;
 217                                                         dst++;
 218                                                 } else
 219                                                         *dst++=*src++;
 220                                         }
 221                                 } else
 222                                         memcpy(dstptr, srcptr, area.width()*surface->bypp);
 223                                 srcptr+=src.surface->stride;
 224                                 dstptr+=surface->stride;
 225                         }
 226                 } else if ((surface->bpp == 32) && (src.surface->bpp==32))
 227                 {
 228                         __u32 *srcptr=(__u32*)src.surface->data;
 229                         __u32 *dstptr=(__u32*)surface->data;
 230
 231                         srcptr+=srcarea.left()+srcarea.top()*src.surface->stride/4;
 232                         dstptr+=area.left()+area.top()*surface->stride/4;
 233                         for (int y=0; y<area.height(); y++)
 234                         {
 235                                 if (flag & blitAlphaTest)
 236                                 {
 237                                         int width=area.width();
 238                                         unsigned long *src=(unsigned long*)srcptr;
 239                                         unsigned long *dst=(unsigned long*)dstptr;
 240
 241                                         while (width--)
 242                                         {
 243                                                 if (!((*src)&0xFF000000))
 244                                                 {
 245                                                         src++;
 246                                                         dst++;
 247                                                 } else
 248                                                         *dst++=*src++;
 249                                         }
 250                                 } else if (flag & blitAlphaBlend)
 251                                 {
 252                                         // uh oh. this is only until hardware accel is working.
 253
 254                                         int width=area.width();
 255                                                         // ARGB color space!
 256                                         unsigned char *src=(unsigned char*)srcptr;
 257                                         unsigned char *dst=(unsigned char*)dstptr;
 258
 259 #define BLEND(x, y, a) (y + ((x-y) * a)/256)
 260                                         while (width--)
 261                                         {
 262                                                 unsigned char sa = src[3];
 263                                                 unsigned char sr = src[2];
 264                                                 unsigned char sg = src[1];
 265                                                 unsigned char sb = src[0];
 266
 267                                                 unsigned char da = dst[3];
 268                                                 unsigned char dr = dst[2];
 269                                                 unsigned char dg = dst[1];
 270                                                 unsigned char db = dst[0];
 271
 272                                                 dst[3] = BLEND(0xFF, da, sa);
 273                                                 dst[2] = BLEND(sr, dr, sa);
 274                                                 dst[1] = BLEND(sg, dg, sa);
 275                                                 dst[0] = BLEND(sb, db, sa);
 276
 277                                                 src += 4; dst += 4;
 278                                         }
 279                                 } else
 280                                         memcpy(dstptr, srcptr, area.width()*surface->bypp);
 281                                 srcptr+=src.surface->stride/4;
 282                                 dstptr+=surface->stride/4;
 283                         }
 284                 } else if ((surface->bpp == 32) && (src.surface->bpp==8))
 285                 {
 286                         __u8 *srcptr=(__u8*)src.surface->data;
 287                         __u8 *dstptr=(__u8*)surface->data; // !!
 288                         __u32 pal[256];
 289
 290                         for (int i=0; i<256; ++i)
 291                         {
 292                                 if (src.surface->clut.data && (i<src.surface->clut.colors))
 293                                         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);
 294                                 else
 295                                         pal[i]=0x010101*i;
 296                                 pal[i]^=0xFF000000;
 297                         }
 298
 299                         srcptr+=srcarea.left()*src.surface->bypp+srcarea.top()*src.surface->stride;
 300                         dstptr+=area.left()*surface->bypp+area.top()*surface->stride;
 301                         for (int y=0; y<area.height(); y++)
 302                         {
 303                                 if (flag & blitAlphaTest)
 304                                 {
 305                       // no real alphatest yet
 306                                         int width=area.width();
 307                                         unsigned char *src=(unsigned char*)srcptr;
 308                                         __u32 *dst=(__u32*)dstptr;
 309                                                 // use duff's device here!
 310                                         while (width--)
 311                                         {
 312                                                 if (!*src)
 313                                                 {
 314                                                         src++;
 315                                                         dst++;
 316                                                 } else
 317                                                         *dst++=pal[*src++];
 318                                         }
 319                                 } else
 320                                 {
 321                                         int width=area.width();
 322                                         unsigned char *src=(unsigned char*)srcptr;
 323                                         __u32 *dst=(__u32*)dstptr;
 324                                         while (width--)
 325                                                 *dst++=pal[*src++];
 326                                 }
 327                                 srcptr+=src.surface->stride;
 328                                 dstptr+=surface->stride;
 329                         }
 330                 } else
 331                         eFatal("cannot blit %dbpp from %dbpp", surface->bpp, src.surface->bpp);
 332         }
 333 }
 334
 335 void gPixmap::mergePalette(const gPixmap &target)
 336 {
 337         if ((!surface->clut.colors) || (!target.surface->clut.colors))
 338                 return;
 339
 340         gColor *lookup=new gColor[surface->clut.colors];
 341
 342         for (int i=0; i<surface->clut.colors; i++)
 343                 lookup[i].color=target.surface->clut.findColor(surface->clut.data[i]);
 344
 345         delete [] surface->clut.data;
 346         surface->clut.colors=target.surface->clut.colors;
 347         surface->clut.data=new gRGB[surface->clut.colors];
 348         memcpy(surface->clut.data, target.surface->clut.data, sizeof(gRGB)*surface->clut.colors);
 349
 350         __u8 *dstptr=(__u8*)surface->data;
 351
 352         for (int ay=0; ay<surface->y; ay++)
 353         {
 354                 for (int ax=0; ax<surface->x; ax++)
 355                         dstptr[ax]=lookup[dstptr[ax]];
 356                 dstptr+=surface->stride;
 357         }
 358
 359         delete [] lookup;
 360 }
 361
 362 static inline int sgn(int a)
 363 {
 364         if (a < 0)
 365                 return -1;
 366         else if (!a)
 367                 return 0;
 368         else
 369                 return 1;
 370 }
 371
 372 void gPixmap::line(const gRegion &clip, ePoint start, ePoint dst, gColor color)
 373 {
 374         __u8 *srf8 = 0;
 375         __u32 *srf32 = 0;
 376         int stride = surface->stride;
 377
 378         if (clip.rects.empty())
 379                 return;
 380
 381         __u32 col;
 382         if (surface->bpp == 8)
 383         {
 384                 srf8 = (__u8*)surface->data;
 385         } else if (surface->bpp == 32)
 386         {
 387                 srf32 = (__u32*)surface->data;
 388
 389                 if (surface->clut.data && color < surface->clut.colors)
 390                         col=(surface->clut.data[color].a<<24)|(surface->clut.data[color].r<<16)|(surface->clut.data[color].g<<8)|(surface->clut.data[color].b);
 391                 else
 392                         col=0x10101*color;
 393                 col^=0xFF000000;
 394         }
 395
 396         int xa = start.x(), ya = start.y(), xb = dst.x(), yb = dst.y();
 397         int dx, dy, x, y, s1, s2, e, temp, swap, i;
 398         dy=abs(yb-ya);
 399         dx=abs(xb-xa);
 400         s1=sgn(xb-xa);
 401         s2=sgn(yb-ya);
 402         x=xa;
 403         y=ya;
 404         if (dy>dx)
 405         {
 406                 temp=dx;
 407                 dx=dy;
 408                 dy=temp;
 409                 swap=1;
 410         } else
 411                 swap=0;
 412         e = 2*dy-dx;
 413
 414         int lasthit = 0;
 415         for(i=1; i<=dx; i++)
 416         {
 417                                 /* i don't like this clipping loop, but the only */
 418                                 /* other choice i see is to calculate the intersections */
 419                                 /* before iterating through the pixels. */
 420
 421                                 /* one could optimize this because of the ordering */
 422                                 /* of the bands. */
 423
 424                 lasthit = 0;
 425                 int a = lasthit;
 426
 427                         /* if last pixel was invisble, first check bounding box */
 428                 if (a == -1)
 429                 {
 430                                 /* check if we just got into the bbox again */
 431                         if (clip.extends.contains(x, y))
 432                                 lasthit = a = 0;
 433                         else
 434                                 goto fail;
 435                 } else if (!clip.rects[a].contains(x, y))
 436                 {
 437                         do
 438                         {
 439                                 ++a;
 440                                 if (a == clip.rects.size())
 441                                         a = 0;
 442                                 if (a == lasthit)
 443                                 {
 444                                         goto fail;
 445                                         lasthit = -1;
 446                                 }
 447                         } while (!clip.rects[a].contains(x, y));
 448                         lasthit = a;
 449                 }
 450
 451                 if (srf8)
 452                         srf8[y * stride + x] = color;
 453                 if (srf32)
 454                         srf32[y * stride/4 + x] = col;
 455 fail:
 456                 while (e>=0)
 457                 {
 458                         if (swap==1) x+=s1;
 459                         else y+=s2;
 460                         e-=2*dx;
 461                 }
 462     if (swap==1)
 463         y+=s2;
 464                 else
 465                         x+=s1;
 466                 e+=2*dy;
 467         }
 468 }
 469
 470 gColor gPalette::findColor(const gRGB &rgb) const
 471 {
 472                 /* grayscale? */
 473         if (!data)
 474                 return (rgb.r + rgb.g + rgb.b) / 3;
 475
 476         int difference=1<<30, best_choice=0;
 477         for (int t=0; t<colors; t++)
 478         {
 479                 int ttd;
 480                 int td=(signed)(rgb.r-data[t].r); td*=td; td*=(255-data[t].a);
 481                 ttd=td;
 482                 if (ttd>=difference)
 483                         continue;
 484                 td=(signed)(rgb.g-data[t].g); td*=td; td*=(255-data[t].a);
 485                 ttd+=td;
 486                 if (ttd>=difference)
 487                         continue;
 488                 td=(signed)(rgb.b-data[t].b); td*=td; td*=(255-data[t].a);
 489                 ttd+=td;
 490                 if (ttd>=difference)
 491                         continue;
 492                 td=(signed)(rgb.a-data[t].a); td*=td; td*=255;
 493                 ttd+=td;
 494                 if (ttd>=difference)
 495                         continue;
 496                 if (!ttd)
 497                         return t;
 498                 difference=ttd;
 499                 best_choice=t;
 500         }
 501         return best_choice;
 502 }
 503
 504 DEFINE_REF(gPixmap);
 505
 506 gPixmap::~gPixmap()
 507 {
 508 }
 509
 510 gPixmap::gPixmap(gSurface *surface): surface(surface)
 511 {
 512 }
 513
 514 gPixmap::gPixmap(eSize size, int bpp, int accel)
 515 {
 516         surface = new gSurface(size, bpp, accel);
 517 }
 518