Pico/Draw2.c

   1 // This is part of Pico Library\r
   2 \r
   3 // (c) Copyright 2007, Grazvydas "notaz" Ignotas\r
   4 // Free for non-commercial use.\r
   5 \r
   6 // For commercial use, separate licencing terms must be obtained.\r
   7 \r
   8 \r
   9 // this is a frame-based renderer, alternative to Dave's line based which is in Draw.c\r
  10 \r
  11 \r
  12 #include "PicoInt.h"\r
  13 \r
  14 // port_config.h include must define these 2 defines:\r
  15 // #define START_ROW  1 // which row of tiles to start rendering at?\r
  16 // #define END_ROW   27 // ..end\r
  17 // one row means 8 pixels. If above example was used, (27-1)*8=208 lines would be rendered.\r
  18 \r
  19 #define TILE_ROWS END_ROW-START_ROW\r
  20 \r
  21 #define USE_CACHE\r
  22 \r
  23 \r
  24 extern unsigned char *framebuff; // in format (8+320)x(8+224+8) (eights for borders)\r
  25 int currpri = 0;\r
  26 \r
  27 static int HighCache2A[41*(TILE_ROWS+1)+1+1]; // caches for high layers\r
  28 static int HighCache2B[41*(TILE_ROWS+1)+1+1];\r
  29 \r
  30 unsigned short *PicoCramHigh=Pico.cram; // pointer to CRAM buff (0x40 shorts), converted to native device color (works only with 16bit for now)\r
  31 void (*PicoPrepareCram)()=0;            // prepares PicoCramHigh for renderer to use\r
  32 \r
  33 \r
  34 // stuff available in asm:\r
  35 #ifdef _ASM_DRAW_C\r
  36 void BackFillFull(int reg7);\r
  37 void DrawLayerFull(int plane, int *hcache, int planestart, int planeend);\r
  38 void DrawTilesFromCacheF(int *hc);\r
  39 void DrawWindowFull(int start, int end, int prio);\r
  40 void DrawSpriteFull(unsigned int *sprite);\r
  41 #else\r
  42 \r
  43 \r
  44 static int TileXnormYnorm(unsigned char *pd,int addr,unsigned char pal)\r
  45 {\r
  46         unsigned int pack=0; unsigned int t=0, blank = 1;\r
  47         int i;\r
  48 \r
  49         for(i=8; i; i--, addr+=2, pd += 320+8) {\r
  50                 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
  51                 if(!pack) continue;\r
  52 \r
  53                 t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);\r
  54                 t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);\r
  55                 t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);\r
  56                 t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t    )|pal);\r
  57                 t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);\r
  58                 t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);\r
  59                 t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);\r
  60                 t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);\r
  61                 blank = 0;\r
  62         }\r
  63 \r
  64         return blank; // Tile blank?\r
  65 }\r
  66 \r
  67 static int TileXflipYnorm(unsigned char *pd,int addr,unsigned char pal)\r
  68 {\r
  69         unsigned int pack=0; unsigned int t=0, blank = 1;\r
  70         int i;\r
  71 \r
  72         for(i=8; i; i--, addr+=2, pd += 320+8) {\r
  73                 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
  74                 if(!pack) continue;\r
  75 \r
  76                 t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);\r
  77                 t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);\r
  78                 t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);\r
  79                 t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);\r
  80                 t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t    )|pal);\r
  81                 t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);\r
  82                 t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);\r
  83                 t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);\r
  84                 blank = 0;\r
  85         }\r
  86         return blank; // Tile blank?\r
  87 }\r
  88 \r
  89 static int TileXnormYflip(unsigned char *pd,int addr,unsigned char pal)\r
  90 {\r
  91         unsigned int pack=0; unsigned int t=0, blank = 1;\r
  92         int i;\r
  93 \r
  94         addr+=14;\r
  95         for(i=8; i; i--, addr-=2, pd += 320+8) {\r
  96                 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
  97                 if(!pack) continue;\r
  98 \r
  99                 t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);\r
 100                 t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);\r
 101                 t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);\r
 102                 t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t    )|pal);\r
 103                 t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);\r
 104                 t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);\r
 105                 t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);\r
 106                 t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);\r
 107                 blank = 0;\r
 108         }\r
 109 \r
 110         return blank; // Tile blank?\r
 111 }\r
 112 \r
 113 static int TileXflipYflip(unsigned char *pd,int addr,unsigned char pal)\r
 114 {\r
 115         unsigned int pack=0; unsigned int t=0, blank = 1;\r
 116         int i;\r
 117 \r
 118         addr+=14;\r
 119         for(i=8; i; i--, addr-=2, pd += 320+8) {\r
 120                 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
 121                 if(!pack) continue;\r
 122 \r
 123                 t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);\r
 124                 t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);\r
 125                 t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);\r
 126                 t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);\r
 127                 t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t    )|pal);\r
 128                 t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);\r
 129                 t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);\r
 130                 t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);\r
 131                 blank = 0;\r
 132         }\r
 133         return blank; // Tile blank?\r
 134 }\r
 135 \r
 136 \r
 137 // start: (tile_start<<16)|row_start, end: [same]\r
 138 static void DrawWindowFull(int start, int end, int prio)\r
 139 {\r
 140         struct PicoVideo *pvid=&Pico.video;\r
 141         int nametab, nametab_step, trow, tilex, blank=-1, code;\r
 142         unsigned char *scrpos = framebuff;\r
 143         int tile_start, tile_end; // in cells\r
 144 \r
 145         // parse ranges\r
 146         tile_start = start>>16;\r
 147         tile_end = end>>16;\r
 148         start = start<<16>>16;\r
 149         end = end<<16>>16;\r
 150 \r
 151         // Find name table line:\r
 152         if (pvid->reg[12]&1)\r
 153         {\r
 154                 nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode\r
 155                 nametab_step = 1<<6;\r
 156         }\r
 157         else\r
 158         {\r
 159                 nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode\r
 160                 nametab_step = 1<<5;\r
 161         }\r
 162         nametab += nametab_step*start;\r
 163 \r
 164         // check priority\r
 165         code=Pico.vram[nametab+tile_start];\r
 166         if ((code>>15) != prio) return; // hack: just assume that whole window uses same priority\r
 167 \r
 168         scrpos+=8*328+8;\r
 169         scrpos+=8*328*(start-START_ROW);\r
 170 \r
 171         // do a window until we reach planestart row\r
 172         for(trow = start; trow < end; trow++, nametab+=nametab_step) { // current tile row\r
 173                 for (tilex=tile_start; tilex<tile_end; tilex++)\r
 174                 {\r
 175                         int code,addr,zero=0;\r
 176 //                      unsigned short *pal=NULL;\r
 177                         unsigned char pal;\r
 178 \r
 179                         code=Pico.vram[nametab+tilex];\r
 180                         if (code==blank) continue;\r
 181 \r
 182                         // Get tile address/2:\r
 183                         addr=(code&0x7ff)<<4;\r
 184 \r
 185 //                      pal=PicoCramHigh+((code>>9)&0x30);\r
 186                         pal=(unsigned char)((code>>9)&0x30);\r
 187 \r
 188                         switch((code>>11)&3) {\r
 189                                 case 0: zero=TileXnormYnorm(scrpos+(tilex<<3),addr,pal); break;\r
 190                                 case 1: zero=TileXflipYnorm(scrpos+(tilex<<3),addr,pal); break;\r
 191                                 case 2: zero=TileXnormYflip(scrpos+(tilex<<3),addr,pal); break;\r
 192                                 case 3: zero=TileXflipYflip(scrpos+(tilex<<3),addr,pal); break;\r
 193                         }\r
 194                         if(zero) blank=code; // We know this tile is blank now\r
 195                 }\r
 196 \r
 197                 scrpos += 328*8;\r
 198         }\r
 199 }\r
 200 \r
 201 \r
 202 static void DrawLayerFull(int plane, int *hcache, int planestart, int planeend)\r
 203 {\r
 204         struct PicoVideo *pvid=&Pico.video;\r
 205         static char shift[4]={5,6,6,7}; // 32,64 or 128 sized tilemaps\r
 206         int width, height, ymask, htab;\r
 207         int nametab, hscroll=0, vscroll, cells;\r
 208         unsigned char *scrpos;\r
 209         int blank=-1, xmask, nametab_row, trow;\r
 210 \r
 211         // parse ranges\r
 212         cells = (planeend>>16)-(planestart>>16);\r
 213         planestart = planestart<<16>>16;\r
 214         planeend = planeend<<16>>16;\r
 215 \r
 216         // Work out the Tiles to draw\r
 217 \r
 218         htab=pvid->reg[13]<<9; // Horizontal scroll table address\r
 219 //      if ( pvid->reg[11]&2)     htab+=Scanline<<1; // Offset by line\r
 220 //      if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile\r
 221         htab+=plane; // A or B\r
 222 \r
 223         if(!(pvid->reg[11]&3)) { // full screen scroll\r
 224                 // Get horizontal scroll value\r
 225                 hscroll=Pico.vram[htab&0x7fff];\r
 226                 htab = 0; // this marks that we don't have to update scroll value\r
 227         }\r
 228 \r
 229         // Work out the name table size: 32 64 or 128 tiles (0-3)\r
 230         width=pvid->reg[16];\r
 231         height=(width>>4)&3; width&=3;\r
 232 \r
 233         xmask=(1<<shift[width ])-1; // X Mask in tiles\r
 234         ymask=(height<<5)|0x1f;     // Y Mask in tiles\r
 235         if(width == 1)   ymask&=0x3f;\r
 236         else if(width>1) ymask =0x1f;\r
 237 \r
 238         // Find name table:\r
 239         if (plane==0) nametab=(pvid->reg[2]&0x38)<< 9; // A\r
 240         else          nametab=(pvid->reg[4]&0x07)<<12; // B\r
 241 \r
 242         scrpos = framebuff;\r
 243         scrpos+=8*328*(planestart-START_ROW);\r
 244 \r
 245         // Get vertical scroll value:\r
 246         vscroll=Pico.vsram[plane]&0x1ff;\r
 247         scrpos+=(8-(vscroll&7))*328;\r
 248         if(vscroll&7) planeend++; // we have vertically clipped tiles due to vscroll, so we need 1 more row\r
 249 \r
 250         *hcache++ = 8-(vscroll&7); // push y-offset to tilecache\r
 251 \r
 252 \r
 253         for(trow = planestart; trow < planeend; trow++) { // current tile row\r
 254                 int cellc=cells,tilex,dx;\r
 255 \r
 256                 // Find the tile row in the name table\r
 257                 //ts.line=(vscroll+Scanline)&ymask;\r
 258                 //ts.nametab+=(ts.line>>3)<<shift[width];\r
 259                 nametab_row = nametab + (((trow+(vscroll>>3))&ymask)<<shift[width]); // pointer to nametable entries for this row\r
 260 \r
 261                 // update hscroll if needed\r
 262                 if(htab) {\r
 263                         int htaddr=htab+(trow<<4);\r
 264                         if(trow) htaddr-=(vscroll&7)<<1;\r
 265                         hscroll=Pico.vram[htaddr&0x7fff];\r
 266                 }\r
 267 \r
 268                 // Draw tiles across screen:\r
 269                 tilex=(-hscroll)>>3;\r
 270                 dx=((hscroll-1)&7)+1;\r
 271                 if(dx != 8) cellc++; // have hscroll, do more cells\r
 272 \r
 273                 for (; cellc; dx+=8,tilex++,cellc--)\r
 274                 {\r
 275                         int code=0,addr=0,zero=0;\r
 276 //                      unsigned short *pal=NULL;\r
 277                         unsigned char pal;\r
 278 \r
 279                         code=Pico.vram[nametab_row+(tilex&xmask)];\r
 280                         if (code==blank) continue;\r
 281 \r
 282 #ifdef USE_CACHE\r
 283                         if (code>>15) { // high priority tile\r
 284                                 *hcache++ = code|(dx<<16)|(trow<<27); // cache it\r
 285 #else\r
 286                         if ((code>>15) != currpri) {\r
 287 #endif\r
 288                                 continue;\r
 289                         }\r
 290 \r
 291                         // Get tile address/2:\r
 292                         addr=(code&0x7ff)<<4;\r
 293 \r
 294 //                      pal=PicoCramHigh+((code>>9)&0x30);\r
 295                         pal=(unsigned char)((code>>9)&0x30);\r
 296 \r
 297                         switch((code>>11)&3) {\r
 298                                 case 0: zero=TileXnormYnorm(scrpos+dx,addr,pal); break;\r
 299                                 case 1: zero=TileXflipYnorm(scrpos+dx,addr,pal); break;\r
 300                                 case 2: zero=TileXnormYflip(scrpos+dx,addr,pal); break;\r
 301                                 case 3: zero=TileXflipYflip(scrpos+dx,addr,pal); break;\r
 302                         }\r
 303                         if(zero) blank=code; // We know this tile is blank now\r
 304                 }\r
 305 \r
 306                 scrpos += 328*8;\r
 307         }\r
 308 \r
 309         *hcache = 0; // terminate cache\r
 310 }\r
 311 \r
 312 \r
 313 static void DrawTilesFromCacheF(int *hc)\r
 314 {\r
 315         int code, addr, zero = 0;\r
 316         unsigned int prevy=0xFFFFFFFF;\r
 317 //      unsigned short *pal;\r
 318         unsigned char pal;\r
 319         short blank=-1; // The tile we know is blank\r
 320         unsigned char *scrpos = framebuff, *pd = 0;\r
 321 \r
 322         // *hcache++ = code|(dx<<16)|(trow<<27); // cache it\r
 323         scrpos+=(*hc++)*328 - START_ROW*328*8;\r
 324 \r
 325         while((code=*hc++)) {\r
 326                 if((short)code == blank) continue;\r
 327 \r
 328                 // y pos\r
 329                 if(((unsigned)code>>27) != prevy) {\r
 330                         prevy = (unsigned)code>>27;\r
 331                         pd = scrpos + prevy*328*8;\r
 332                 }\r
 333 \r
 334                 // Get tile address/2:\r
 335                 addr=(code&0x7ff)<<4;\r
 336 //              pal=PicoCramHigh+((code>>9)&0x30);\r
 337                 pal=(unsigned char)((code>>9)&0x30);\r
 338 \r
 339                 switch((code>>11)&3) {\r
 340                         case 0: zero=TileXnormYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r
 341                         case 1: zero=TileXflipYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r
 342                         case 2: zero=TileXnormYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r
 343                         case 3: zero=TileXflipYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r
 344                 }\r
 345 \r
 346                 if(zero) blank=(short)code;\r
 347         }\r
 348 }\r
 349 \r
 350 \r
 351 // sx and sy are coords of virtual screen with 8pix borders on top and on left\r
 352 static void DrawSpriteFull(unsigned int *sprite)\r
 353 {\r
 354         int width=0,height=0;\r
 355 //      unsigned short *pal=NULL;\r
 356         unsigned char pal;\r
 357         int tile,code,tdeltax,tdeltay;\r
 358         unsigned char *scrpos;\r
 359         int sx, sy;\r
 360 \r
 361         sy=sprite[0];\r
 362         height=sy>>24;\r
 363         sy=(sy&0x1ff)-0x78; // Y\r
 364         width=(height>>2)&3; height&=3;\r
 365         width++; height++; // Width and height in tiles\r
 366 \r
 367         code=sprite[1];\r
 368         sx=((code>>16)&0x1ff)-0x78; // X\r
 369 \r
 370         tile=code&0x7ff; // Tile number\r
 371         tdeltax=height; // Delta to increase tile by going right\r
 372         tdeltay=1;      // Delta to increase tile by going down\r
 373         if (code&0x0800) { tdeltax=-tdeltax; tile+=height*(width-1); } // Flip X\r
 374         if (code&0x1000) { tdeltay=-tdeltay; tile+=height-1; } // Flip Y\r
 375 \r
 376         //delta<<=4; // Delta of address\r
 377 //      pal=PicoCramHigh+((code>>9)&0x30); // Get palette pointer\r
 378         pal=(unsigned char)((code>>9)&0x30);\r
 379 \r
 380         // goto first vertically visible tile\r
 381         while(sy <= START_ROW*8) { sy+=8; tile+=tdeltay; height--; }\r
 382 \r
 383         scrpos = framebuff;\r
 384         scrpos+=(sy-START_ROW*8)*328;\r
 385 \r
 386         for (; height > 0; height--, sy+=8, tile+=tdeltay)\r
 387         {\r
 388                 int w = width, x=sx, t=tile;\r
 389 \r
 390                 if(sy >= END_ROW*8+8) return; // offscreen\r
 391 \r
 392                 for (; w; w--,x+=8,t+=tdeltax)\r
 393                 {\r
 394                         if(x<=0)   continue;\r
 395                         if(x>=328) break; // Offscreen\r
 396 \r
 397                         t&=0x7fff; // Clip tile address\r
 398                         switch((code>>11)&3) {\r
 399                                 case 0: TileXnormYnorm(scrpos+x,t<<4,pal); break;\r
 400                                 case 1: TileXflipYnorm(scrpos+x,t<<4,pal); break;\r
 401                                 case 2: TileXnormYflip(scrpos+x,t<<4,pal); break;\r
 402                                 case 3: TileXflipYflip(scrpos+x,t<<4,pal); break;\r
 403                         }\r
 404                 }\r
 405 \r
 406                 scrpos+=8*328;\r
 407         }\r
 408 }\r
 409 #endif\r
 410 \r
 411 \r
 412 static void DrawAllSpritesFull(int prio, int maxwidth)\r
 413 {\r
 414         struct PicoVideo *pvid=&Pico.video;\r
 415         int table=0,maskrange=0;\r
 416         int i,u,link=0;\r
 417         unsigned int *sprites[80]; // Sprites\r
 418         int y_min=START_ROW*8, y_max=END_ROW*8; // for a simple sprite masking\r
 419 \r
 420         table=pvid->reg[5]&0x7f;\r
 421         if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r
 422         table<<=8; // Get sprite table address/2\r
 423 \r
 424         for (i=u=0; u < 80; u++)\r
 425         {\r
 426                 unsigned int *sprite=NULL;\r
 427                 int code, code2, sx, sy, height;\r
 428 \r
 429                 sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r
 430 \r
 431                 // get sprite info\r
 432                 code = sprite[0];\r
 433 \r
 434                 // check if it is not hidden vertically\r
 435                 sy = (code&0x1ff)-0x80;\r
 436                 height = (((code>>24)&3)+1)<<3;\r
 437                 if(sy+height <= y_min || sy > y_max) goto nextsprite;\r
 438 \r
 439                 // masking sprite?\r
 440                 code2=sprite[1];\r
 441                 sx = (code2>>16)&0x1ff;\r
 442                 if(!sx) {\r
 443                         int to = sy+height; // sy ~ from\r
 444                         if(maskrange) {\r
 445                                 // try to merge with previous range\r
 446                                 if((maskrange>>16)+1 >= sy && (maskrange>>16) <= to && (maskrange&0xffff) < sy) sy = (maskrange&0xffff);\r
 447                                 else if((maskrange&0xffff)-1 <= to && (maskrange&0xffff) >= sy && (maskrange>>16) > to) to = (maskrange>>16);\r
 448                         }\r
 449                         // support only very simple masking (top and bottom of screen)\r
 450                         if(sy <= y_min && to+1 > y_min) y_min = to+1;\r
 451                         else if(to >= y_max && sy-1 < y_max) y_max = sy-1;\r
 452                         else maskrange=sy|(to<<16);\r
 453 \r
 454                         goto nextsprite;\r
 455                 }\r
 456 \r
 457                 // priority\r
 458                 if(((code2>>15)&1) != prio) goto nextsprite; // wrong priority\r
 459 \r
 460                 // check if sprite is not hidden horizontally\r
 461                 sx -= 0x78; // Get X coordinate + 8\r
 462                 if(sx <= -8*3 || sx >= maxwidth) goto nextsprite;\r
 463 \r
 464                 // sprite is good, save it's index\r
 465                 sprites[i++]=sprite;\r
 466 \r
 467                 nextsprite:\r
 468                 // Find next sprite\r
 469                 link=(code>>16)&0x7f;\r
 470                 if(!link) break; // End of sprites\r
 471         }\r
 472 \r
 473         // Go through sprites backwards:\r
 474         for (i-- ;i>=0; i--)\r
 475         {\r
 476                 DrawSpriteFull(sprites[i]);\r
 477         }\r
 478 }\r
 479 \r
 480 #ifndef _ASM_DRAW_C\r
 481 static void BackFillFull(int reg7)\r
 482 {\r
 483         unsigned int back, i;\r
 484         unsigned int *p=(unsigned int *)framebuff;\r
 485 \r
 486         // Start with a background color:\r
 487 //      back=PicoCramHigh[reg7&0x3f];\r
 488         back=reg7&0x3f;\r
 489         back|=back<<8;\r
 490         back|=back<<16;\r
 491 \r
 492         for(i = (8+320)*(8+(END_ROW-START_ROW)*8)/16; i; i--) {\r
 493                 *p++ = back; // do 16 pixels per iteration\r
 494                 *p++ = back;\r
 495                 *p++ = back;\r
 496                 *p++ = back;\r
 497         }\r
 498 }\r
 499 #endif\r
 500 \r
 501 static void DrawDisplayFull()\r
 502 {\r
 503         struct PicoVideo *pvid=&Pico.video;\r
 504         int win, edge=0, hvwin=0; // LSb->MSb: hwin&plane, vwin&plane, full\r
 505         int planestart=START_ROW, planeend=END_ROW; // plane A start/end when window shares display with plane A (in tile rows or columns)\r
 506         int winstart=START_ROW, winend=END_ROW;     // same for window\r
 507         int maxw, maxcolc; // max width and col cells\r
 508 \r
 509         if(pvid->reg[12]&1) {\r
 510                 maxw = 328; maxcolc = 40;\r
 511         } else {\r
 512                 maxw = 264; maxcolc = 32;\r
 513         }\r
 514 \r
 515         // horizontal window?\r
 516         if((win=pvid->reg[0x12])) {\r
 517                 hvwin=1; // hwindow shares display with plane A\r
 518                 edge=win&0x1f;\r
 519                 if(win == 0x80) {\r
 520                         // fullscreen window\r
 521                         hvwin=4;\r
 522                 } else if(win < 0x80) {\r
 523                         // window on the top\r
 524                              if(edge <= START_ROW) hvwin=0; // window not visible in our drawing region\r
 525                         else if(edge >= END_ROW)   hvwin=4;\r
 526                         else planestart = winend = edge;\r
 527                 } else if(win > 0x80) {\r
 528                         // window at the bottom\r
 529                         if(edge >= END_ROW) hvwin=0;\r
 530                         else planeend = winstart = edge;\r
 531                 }\r
 532         }\r
 533 \r
 534         // check for vertical window, but only if win is not fullscreen\r
 535         if(hvwin != 4) {\r
 536                 win=pvid->reg[0x11];\r
 537                 edge=win&0x1f;\r
 538                 if (win&0x80) {\r
 539                         if(!edge) hvwin=4;\r
 540                         else if(edge < (maxcolc>>1)) {\r
 541                                 // window is on the right\r
 542                                 hvwin|=2;\r
 543                                 planeend|=edge<<17;\r
 544                                 winstart|=edge<<17;\r
 545                                 winend|=maxcolc<<16;\r
 546                         }\r
 547                 } else {\r
 548                         if(edge >= (maxcolc>>1)) hvwin=4;\r
 549                         else if(edge) {\r
 550                                 // window is on the left\r
 551                                 hvwin|=2;\r
 552                                 winend|=edge<<17;\r
 553                                 planestart|=edge<<17;\r
 554                                 planeend|=maxcolc<<16;\r
 555                         }\r
 556                 }\r
 557         }\r
 558 \r
 559         if(hvwin==1) { winend|=maxcolc<<16; planeend|=maxcolc<<16; }\r
 560 \r
 561         currpri = 0;\r
 562         DrawLayerFull(1, HighCache2B, START_ROW, (maxcolc<<16)|END_ROW);\r
 563         switch(hvwin) {\r
 564                 case 4:\r
 565                 // fullscreen window\r
 566                 DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 0);\r
 567                 HighCache2A[1] = 0;\r
 568                 break;\r
 569 \r
 570                 case 3:\r
 571                 // we have plane A and both v and h windows\r
 572                 DrawLayerFull(0, HighCache2A, planestart, planeend);\r
 573                 DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 0); // h\r
 574                 DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 0);    // v\r
 575                 break;\r
 576 \r
 577                 case 2:\r
 578                 case 1:\r
 579                 // both window and plane A visible, window is vertical XOR horizontal\r
 580                 DrawLayerFull(0, HighCache2A, planestart, planeend);\r
 581                 DrawWindowFull(winstart, winend, 0);\r
 582                 break;\r
 583 \r
 584                 default:\r
 585                 // fullscreen plane A\r
 586                 DrawLayerFull(0, HighCache2A, START_ROW, (maxcolc<<16)|END_ROW);\r
 587                 break;\r
 588         }\r
 589         DrawAllSpritesFull(0, maxw);\r
 590 \r
 591 #ifdef USE_CACHE\r
 592         if(HighCache2B[1]) DrawTilesFromCacheF(HighCache2B);\r
 593         if(HighCache2A[1]) DrawTilesFromCacheF(HighCache2A);\r
 594         switch(hvwin) {\r
 595                 case 4:\r
 596                 // fullscreen window\r
 597                 DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 1);\r
 598                 break;\r
 599 \r
 600                 case 3:\r
 601                 // we have plane A and both v and h windows\r
 602                 DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 1); // h\r
 603                 DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 1);    // v\r
 604                 break;\r
 605 \r
 606                 case 2:\r
 607                 case 1:\r
 608                 // both window and plane A visible, window is vertical XOR horizontal\r
 609                 DrawWindowFull(winstart, winend, 1);\r
 610                 break;\r
 611         }\r
 612 #else\r
 613         currpri = 1;\r
 614         // TODO\r
 615 #endif\r
 616         DrawAllSpritesFull(1, maxw);\r
 617 }\r
 618 \r
 619 \r
 620 PICO_INTERNAL void PicoFrameFull()\r
 621 {\r
 622         // prepare cram?\r
 623         if(PicoPrepareCram) PicoPrepareCram();\r
 624 \r
 625         // Draw screen:\r
 626         BackFillFull(Pico.video.reg[7]);\r
 627         if (Pico.video.reg[1]&0x40) DrawDisplayFull();\r
 628 }\r
 629 \r