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 = new unsigned char [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                         delete [] (unsigned char*)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::fill(const gRegion &region, const gRGB &color)
 179 {
 180         unsigned int i;
 181         for (i=0; i<region.rects.size(); ++i)
 182         {
 183                 const eRect &area = region.rects[i];
 184                 if ((area.height()<=0) || (area.width()<=0))
 185                         continue;
 186
 187                 if (surface->bpp == 32)
 188                 {
 189                         __u32 col;
 190
 191                         col = color.argb();
 192                         col^=0xFF000000;
 193
 194                         if (surface->data_phys && gAccel::getInstance())
 195                                 if (!gAccel::getInstance()->fill(surface,  area, col))
 196                                         continue;
 197
 198                         for (int y=area.top(); y<area.bottom(); y++)
 199                         {
 200                                 __u32 *dst=(__u32*)(((__u8*)surface->data)+y*surface->stride+area.left()*surface->bypp);
 201                                 int x=area.width();
 202                                 while (x--)
 203                                         *dst++=col;
 204                         }
 205                 }       else
 206                         eWarning("couldn't rgbfill %d bpp", surface->bpp);
 207         }
 208 }
 209
 210 void gPixmap::blit(const gPixmap &src, ePoint pos, const gRegion &clip, int flag)
 211 {
 212         for (unsigned int i=0; i<clip.rects.size(); ++i)
 213         {
 214                 eRect area=eRect(pos, src.size());
 215                 area&=clip.rects[i];
 216                 area&=eRect(ePoint(0, 0), size());
 217
 218                 if ((area.width()<0) || (area.height()<0))
 219                         continue;
 220
 221                 eRect srcarea=area;
 222                 srcarea.moveBy(-pos.x(), -pos.y());
 223
 224                 if ((surface->data_phys && src.surface->data_phys) && (gAccel::getInstance()))
 225                         if (!gAccel::getInstance()->blit(surface, src.surface, area.topLeft(), srcarea, flag))
 226                                 continue;
 227
 228                 if ((surface->bpp == 8) && (src.surface->bpp==8))
 229                 {
 230                         __u8 *srcptr=(__u8*)src.surface->data;
 231                         __u8 *dstptr=(__u8*)surface->data;
 232
 233                         srcptr+=srcarea.left()*src.surface->bypp+srcarea.top()*src.surface->stride;
 234                         dstptr+=area.left()*surface->bypp+area.top()*surface->stride;
 235                         for (int y=0; y<area.height(); y++)
 236                         {
 237                                 if (flag & blitAlphaTest)
 238                                 {
 239                       // no real alphatest yet
 240                                         int width=area.width();
 241                                         unsigned char *src=(unsigned char*)srcptr;
 242                                         unsigned char *dst=(unsigned char*)dstptr;
 243                                                 // use duff's device here!
 244                                         while (width--)
 245                                         {
 246                                                 if (!*src)
 247                                                 {
 248                                                         src++;
 249                                                         dst++;
 250                                                 } else
 251                                                         *dst++=*src++;
 252                                         }
 253                                 } else
 254                                         memcpy(dstptr, srcptr, area.width()*surface->bypp);
 255                                 srcptr+=src.surface->stride;
 256                                 dstptr+=surface->stride;
 257                         }
 258                 } else if ((surface->bpp == 32) && (src.surface->bpp==32))
 259                 {
 260                         __u32 *srcptr=(__u32*)src.surface->data;
 261                         __u32 *dstptr=(__u32*)surface->data;
 262
 263                         srcptr+=srcarea.left()+srcarea.top()*src.surface->stride/4;
 264                         dstptr+=area.left()+area.top()*surface->stride/4;
 265                         for (int y=0; y<area.height(); y++)
 266                         {
 267                                 if (flag & blitAlphaTest)
 268                                 {
 269                                         int width=area.width();
 270                                         unsigned long *src=(unsigned long*)srcptr;
 271                                         unsigned long *dst=(unsigned long*)dstptr;
 272
 273                                         while (width--)
 274                                         {
 275                                                 if (!((*src)&0xFF000000))
 276                                                 {
 277                                                         src++;
 278                                                         dst++;
 279                                                 } else
 280                                                         *dst++=*src++;
 281                                         }
 282                                 } else if (flag & blitAlphaBlend)
 283                                 {
 284                                         // uh oh. this is only until hardware accel is working.
 285
 286                                         int width=area.width();
 287                                                         // ARGB color space!
 288                                         unsigned char *src=(unsigned char*)srcptr;
 289                                         unsigned char *dst=(unsigned char*)dstptr;
 290
 291 #define BLEND(x, y, a) (y + ((x-y) * a)/256)
 292                                         while (width--)
 293                                         {
 294                                                 unsigned char sa = src[3];
 295                                                 unsigned char sr = src[2];
 296                                                 unsigned char sg = src[1];
 297                                                 unsigned char sb = src[0];
 298
 299                                                 unsigned char da = dst[3];
 300                                                 unsigned char dr = dst[2];
 301                                                 unsigned char dg = dst[1];
 302                                                 unsigned char db = dst[0];
 303
 304                                                 dst[3] = BLEND(0xFF, da, sa);
 305                                                 dst[2] = BLEND(sr, dr, sa);
 306                                                 dst[1] = BLEND(sg, dg, sa);
 307                                                 dst[0] = BLEND(sb, db, sa);
 308
 309                                                 src += 4; dst += 4;
 310                                         }
 311                                 } else
 312                                         memcpy(dstptr, srcptr, area.width()*surface->bypp);
 313                                 srcptr+=src.surface->stride/4;
 314                                 dstptr+=surface->stride/4;
 315                         }
 316                 } else if ((surface->bpp == 32) && (src.surface->bpp==8))
 317                 {
 318                         __u8 *srcptr=(__u8*)src.surface->data;
 319                         __u8 *dstptr=(__u8*)surface->data; // !!
 320                         __u32 pal[256];
 321
 322                         for (int i=0; i<256; ++i)
 323                         {
 324                                 if (src.surface->clut.data && (i<src.surface->clut.colors))
 325                                         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);
 326                                 else
 327                                         pal[i]=0x010101*i;
 328                                 pal[i]^=0xFF000000;
 329                         }
 330
 331                         srcptr+=srcarea.left()*src.surface->bypp+srcarea.top()*src.surface->stride;
 332                         dstptr+=area.left()*surface->bypp+area.top()*surface->stride;
 333                         for (int y=0; y<area.height(); y++)
 334                         {
 335                                 if (flag & blitAlphaTest)
 336                                 {
 337                       // no real alphatest yet
 338                                         int width=area.width();
 339                                         unsigned char *src=(unsigned char*)srcptr;
 340                                         __u32 *dst=(__u32*)dstptr;
 341                                                 // use duff's device here!
 342                                         while (width--)
 343                                         {
 344                                                 if (!(pal[*src]&0x80000000))
 345                                                 {
 346                                                         src++;
 347                                                         dst++;
 348                                                 } else
 349                                                         *dst++=pal[*src++];
 350                                         }
 351                                 } else
 352                                 {
 353                                         int width=area.width();
 354                                         unsigned char *src=(unsigned char*)srcptr;
 355                                         __u32 *dst=(__u32*)dstptr;
 356                                         while (width--)
 357                                                 *dst++=pal[*src++];
 358                                 }
 359                                 srcptr+=src.surface->stride;
 360                                 dstptr+=surface->stride;
 361                         }
 362                 } else
 363                         eWarning("cannot blit %dbpp from %dbpp", surface->bpp, src.surface->bpp);
 364         }
 365 }
 366
 367 void gPixmap::mergePalette(const gPixmap &target)
 368 {
 369         if ((!surface->clut.colors) || (!target.surface->clut.colors))
 370                 return;
 371
 372         gColor *lookup=new gColor[surface->clut.colors];
 373
 374         for (int i=0; i<surface->clut.colors; i++)
 375                 lookup[i].color=target.surface->clut.findColor(surface->clut.data[i]);
 376
 377         delete [] surface->clut.data;
 378         surface->clut.colors=target.surface->clut.colors;
 379         surface->clut.data=new gRGB[surface->clut.colors];
 380         memcpy(surface->clut.data, target.surface->clut.data, sizeof(gRGB)*surface->clut.colors);
 381
 382         __u8 *dstptr=(__u8*)surface->data;
 383
 384         for (int ay=0; ay<surface->y; ay++)
 385         {
 386                 for (int ax=0; ax<surface->x; ax++)
 387                         dstptr[ax]=lookup[dstptr[ax]];
 388                 dstptr+=surface->stride;
 389         }
 390
 391         delete [] lookup;
 392 }
 393
 394 static inline int sgn(int a)
 395 {
 396         if (a < 0)
 397                 return -1;
 398         else if (!a)
 399                 return 0;
 400         else
 401                 return 1;
 402 }
 403
 404 void gPixmap::line(const gRegion &clip, ePoint start, ePoint dst, gColor color)
 405 {
 406         __u8 *srf8 = 0;
 407         __u32 *srf32 = 0;
 408         int stride = surface->stride;
 409
 410         if (clip.rects.empty())
 411                 return;
 412
 413         __u32 col = 0;
 414         if (surface->bpp == 8)
 415         {
 416                 srf8 = (__u8*)surface->data;
 417         } else if (surface->bpp == 32)
 418         {
 419                 srf32 = (__u32*)surface->data;
 420
 421                 if (surface->clut.data && color < surface->clut.colors)
 422                         col=(surface->clut.data[color].a<<24)|(surface->clut.data[color].r<<16)|(surface->clut.data[color].g<<8)|(surface->clut.data[color].b);
 423                 else
 424                         col=0x10101*color;
 425                 col^=0xFF000000;
 426         }
 427
 428         int xa = start.x(), ya = start.y(), xb = dst.x(), yb = dst.y();
 429         int dx, dy, x, y, s1, s2, e, temp, swap, i;
 430         dy=abs(yb-ya);
 431         dx=abs(xb-xa);
 432         s1=sgn(xb-xa);
 433         s2=sgn(yb-ya);
 434         x=xa;
 435         y=ya;
 436         if (dy>dx)
 437         {
 438                 temp=dx;
 439                 dx=dy;
 440                 dy=temp;
 441                 swap=1;
 442         } else
 443                 swap=0;
 444         e = 2*dy-dx;
 445
 446         int lasthit = 0;
 447         for(i=1; i<=dx; i++)
 448         {
 449                                 /* i don't like this clipping loop, but the only */
 450                                 /* other choice i see is to calculate the intersections */
 451                                 /* before iterating through the pixels. */
 452
 453                                 /* one could optimize this because of the ordering */
 454                                 /* of the bands. */
 455
 456                 lasthit = 0;
 457                 int a = lasthit;
 458
 459                         /* if last pixel was invisble, first check bounding box */
 460                 if (a == -1)
 461                 {
 462                                 /* check if we just got into the bbox again */
 463                         if (clip.extends.contains(x, y))
 464                                 lasthit = a = 0;
 465                         else
 466                                 goto fail;
 467                 } else if (!clip.rects[a].contains(x, y))
 468                 {
 469                         do
 470                         {
 471                                 ++a;
 472                                 if ((unsigned int)a == clip.rects.size())
 473                                         a = 0;
 474                                 if (a == lasthit)
 475                                 {
 476                                         goto fail;
 477                                         lasthit = -1;
 478                                 }
 479                         } while (!clip.rects[a].contains(x, y));
 480                         lasthit = a;
 481                 }
 482
 483                 if (srf8)
 484                         srf8[y * stride + x] = color;
 485                 if (srf32)
 486                         srf32[y * stride/4 + x] = col;
 487 fail:
 488                 while (e>=0)
 489                 {
 490                         if (swap==1) x+=s1;
 491                         else y+=s2;
 492                         e-=2*dx;
 493                 }
 494     if (swap==1)
 495         y+=s2;
 496                 else
 497                         x+=s1;
 498                 e+=2*dy;
 499         }
 500 }
 501
 502 gColor gPalette::findColor(const gRGB &rgb) const
 503 {
 504                 /* grayscale? */
 505         if (!data)
 506                 return (rgb.r + rgb.g + rgb.b) / 3;
 507
 508         int difference=1<<30, best_choice=0;
 509         for (int t=0; t<colors; t++)
 510         {
 511                 int ttd;
 512                 int td=(signed)(rgb.r-data[t].r); td*=td; td*=(255-data[t].a);
 513                 ttd=td;
 514                 if (ttd>=difference)
 515                         continue;
 516                 td=(signed)(rgb.g-data[t].g); td*=td; td*=(255-data[t].a);
 517                 ttd+=td;
 518                 if (ttd>=difference)
 519                         continue;
 520                 td=(signed)(rgb.b-data[t].b); td*=td; td*=(255-data[t].a);
 521                 ttd+=td;
 522                 if (ttd>=difference)
 523                         continue;
 524                 td=(signed)(rgb.a-data[t].a); td*=td; td*=255;
 525                 ttd+=td;
 526                 if (ttd>=difference)
 527                         continue;
 528                 if (!ttd)
 529                         return t;
 530                 difference=ttd;
 531                 best_choice=t;
 532         }
 533         return best_choice;
 534 }
 535
 536 DEFINE_REF(gPixmap);
 537
 538 gPixmap::~gPixmap()
 539 {
 540         if (must_delete_surface)
 541                 delete surface;
 542 }
 543
 544 gPixmap::gPixmap(gSurface *surface)
 545         :surface(surface), must_delete_surface(false)
 546 {
 547 }
 548
 549 gPixmap::gPixmap(eSize size, int bpp, int accel)
 550         :must_delete_surface(true)
 551 {
 552         surface = new gSurface(size, bpp, accel);
 553 }
 554