pico/draw2.c

   1 /*\r
   2  * tile renderer\r
   3  * (C) notaz, 2006-2008\r
   4  *\r
   5  * This work is licensed under the terms of MAME license.\r
   6  * See COPYING file in the top-level directory.\r
   7  */\r
   8 \r
   9 #include "pico_int.h"\r
  10 \r
  11 #define START_ROW  0 // which row of tiles to start rendering at?\r
  12 #define END_ROW   28 // ..end\r
  13 \r
  14 #define TILE_ROWS END_ROW-START_ROW\r
  15 \r
  16 // note: this is not implemented in ARM asm\r
  17 #if defined(DRAW2_OVERRIDE_LINE_WIDTH)\r
  18 #define LINE_WIDTH DRAW2_OVERRIDE_LINE_WIDTH\r
  19 #else\r
  20 #define LINE_WIDTH 328\r
  21 #endif\r
  22 \r
  23 static unsigned char PicoDraw2FB_[(8+320) * (8+240+8)];\r
  24 \r
  25 static int HighCache2A[41*(TILE_ROWS+1)+1+1]; // caches for high layers\r
  26 static int HighCache2B[41*(TILE_ROWS+1)+1+1];\r
  27 \r
  28 unsigned short *PicoCramHigh=Pico.cram; // pointer to CRAM buff (0x40 shorts), converted to native device color (works only with 16bit for now)\r
  29 void (*PicoPrepareCram)()=0;            // prepares PicoCramHigh for renderer to use\r
  30 \r
  31 \r
  32 // stuff available in asm:\r
  33 #ifdef _ASM_DRAW_C\r
  34 void BackFillFull(void *dst, int reg7);\r
  35 void DrawLayerFull(int plane, int *hcache, int planestart, int planeend,\r
  36                    struct PicoEState *est);\r
  37 void DrawTilesFromCacheF(int *hc, struct PicoEState *est);\r
  38 void DrawWindowFull(int start, int end, int prio, struct PicoEState *est);\r
  39 void DrawSpriteFull(unsigned int *sprite, struct PicoEState *est);\r
  40 #else\r
  41 \r
  42 \r
  43 static int TileXnormYnorm(unsigned char *pd,int addr,unsigned char pal)\r
  44 {\r
  45         unsigned int pack=0; unsigned int t=0, blank = 1;\r
  46         int i;\r
  47 \r
  48         for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {\r
  49                 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
  50                 if(!pack) continue;\r
  51 \r
  52                 t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);\r
  53                 t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);\r
  54                 t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);\r
  55                 t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t    )|pal);\r
  56                 t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);\r
  57                 t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);\r
  58                 t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);\r
  59                 t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);\r
  60                 blank = 0;\r
  61         }\r
  62 \r
  63         return blank; // Tile blank?\r
  64 }\r
  65 \r
  66 static int TileXflipYnorm(unsigned char *pd,int addr,unsigned char pal)\r
  67 {\r
  68         unsigned int pack=0; unsigned int t=0, blank = 1;\r
  69         int i;\r
  70 \r
  71         for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {\r
  72                 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
  73                 if(!pack) continue;\r
  74 \r
  75                 t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);\r
  76                 t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);\r
  77                 t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);\r
  78                 t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);\r
  79                 t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t    )|pal);\r
  80                 t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);\r
  81                 t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);\r
  82                 t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);\r
  83                 blank = 0;\r
  84         }\r
  85         return blank; // Tile blank?\r
  86 }\r
  87 \r
  88 static int TileXnormYflip(unsigned char *pd,int addr,unsigned char pal)\r
  89 {\r
  90         unsigned int pack=0; unsigned int t=0, blank = 1;\r
  91         int i;\r
  92 \r
  93         addr+=14;\r
  94         for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {\r
  95                 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
  96                 if(!pack) continue;\r
  97 \r
  98                 t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);\r
  99                 t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);\r
 100                 t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);\r
 101                 t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t    )|pal);\r
 102                 t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);\r
 103                 t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);\r
 104                 t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);\r
 105                 t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);\r
 106                 blank = 0;\r
 107         }\r
 108 \r
 109         return blank; // Tile blank?\r
 110 }\r
 111 \r
 112 static int TileXflipYflip(unsigned char *pd,int addr,unsigned char pal)\r
 113 {\r
 114         unsigned int pack=0; unsigned int t=0, blank = 1;\r
 115         int i;\r
 116 \r
 117         addr+=14;\r
 118         for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {\r
 119                 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
 120                 if(!pack) continue;\r
 121 \r
 122                 t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);\r
 123                 t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);\r
 124                 t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);\r
 125                 t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);\r
 126                 t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t    )|pal);\r
 127                 t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);\r
 128                 t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);\r
 129                 t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);\r
 130                 blank = 0;\r
 131         }\r
 132         return blank; // Tile blank?\r
 133 }\r
 134 \r
 135 \r
 136 // start: (tile_start<<16)|row_start, end: [same]\r
 137 static void DrawWindowFull(int start, int end, int prio, struct PicoEState *est)\r
 138 {\r
 139         struct PicoVideo *pvid=&Pico.video;\r
 140         int nametab, nametab_step, trow, tilex, blank=-1, code;\r
 141         unsigned char *scrpos = est->Draw2FB;\r
 142         int tile_start, tile_end; // in cells\r
 143 \r
 144         // parse ranges\r
 145         tile_start = start>>16;\r
 146         tile_end = end>>16;\r
 147         start = start<<16>>16;\r
 148         end = end<<16>>16;\r
 149 \r
 150         // Find name table line:\r
 151         if (pvid->reg[12]&1)\r
 152         {\r
 153                 nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode\r
 154                 nametab_step = 1<<6;\r
 155         }\r
 156         else\r
 157         {\r
 158                 nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode\r
 159                 nametab_step = 1<<5;\r
 160         }\r
 161         nametab += nametab_step*start;\r
 162 \r
 163         // check priority\r
 164         code=Pico.vram[nametab+tile_start];\r
 165         if ((code>>15) != prio) return; // hack: just assume that whole window uses same priority\r
 166 \r
 167         scrpos+=8*LINE_WIDTH+8;\r
 168         scrpos+=8*LINE_WIDTH*(start-START_ROW);\r
 169 \r
 170         // do a window until we reach planestart row\r
 171         for(trow = start; trow < end; trow++, nametab+=nametab_step) { // current tile row\r
 172                 for (tilex=tile_start; tilex<tile_end; tilex++)\r
 173                 {\r
 174                         int code,addr,zero=0;\r
 175 //                      unsigned short *pal=NULL;\r
 176                         unsigned char pal;\r
 177 \r
 178                         code=Pico.vram[nametab+tilex];\r
 179                         if (code==blank) continue;\r
 180 \r
 181                         // Get tile address/2:\r
 182                         addr=(code&0x7ff)<<4;\r
 183 \r
 184 //                      pal=PicoCramHigh+((code>>9)&0x30);\r
 185                         pal=(unsigned char)((code>>9)&0x30);\r
 186 \r
 187                         switch((code>>11)&3) {\r
 188                                 case 0: zero=TileXnormYnorm(scrpos+(tilex<<3),addr,pal); break;\r
 189                                 case 1: zero=TileXflipYnorm(scrpos+(tilex<<3),addr,pal); break;\r
 190                                 case 2: zero=TileXnormYflip(scrpos+(tilex<<3),addr,pal); break;\r
 191                                 case 3: zero=TileXflipYflip(scrpos+(tilex<<3),addr,pal); break;\r
 192                         }\r
 193                         if(zero) blank=code; // We know this tile is blank now\r
 194                 }\r
 195 \r
 196                 scrpos += LINE_WIDTH*8;\r
 197         }\r
 198 }\r
 199 \r
 200 \r
 201 static void DrawLayerFull(int plane, int *hcache, int planestart, int planeend,\r
 202                           struct PicoEState *est)\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 = est->Draw2FB;\r
 243         scrpos+=8*LINE_WIDTH*(planestart-START_ROW);\r
 244 \r
 245         // Get vertical scroll value:\r
 246         vscroll=Pico.vsram[plane]&0x1ff;\r
 247         scrpos+=(8-(vscroll&7))*LINE_WIDTH;\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                         if (code>>15) { // high priority tile\r
 283                                 *hcache++ = code|(dx<<16)|(trow<<27); // cache it\r
 284                                 continue;\r
 285                         }\r
 286 \r
 287                         // Get tile address/2:\r
 288                         addr=(code&0x7ff)<<4;\r
 289 \r
 290 //                      pal=PicoCramHigh+((code>>9)&0x30);\r
 291                         pal=(unsigned char)((code>>9)&0x30);\r
 292 \r
 293                         switch((code>>11)&3) {\r
 294                                 case 0: zero=TileXnormYnorm(scrpos+dx,addr,pal); break;\r
 295                                 case 1: zero=TileXflipYnorm(scrpos+dx,addr,pal); break;\r
 296                                 case 2: zero=TileXnormYflip(scrpos+dx,addr,pal); break;\r
 297                                 case 3: zero=TileXflipYflip(scrpos+dx,addr,pal); break;\r
 298                         }\r
 299                         if(zero) blank=code; // We know this tile is blank now\r
 300                 }\r
 301 \r
 302                 scrpos += LINE_WIDTH*8;\r
 303         }\r
 304 \r
 305         *hcache = 0; // terminate cache\r
 306 }\r
 307 \r
 308 \r
 309 static void DrawTilesFromCacheF(int *hc, struct PicoEState *est)\r
 310 {\r
 311         int code, addr, zero = 0;\r
 312         unsigned int prevy=0xFFFFFFFF;\r
 313 //      unsigned short *pal;\r
 314         unsigned char pal;\r
 315         short blank=-1; // The tile we know is blank\r
 316         unsigned char *scrpos = est->Draw2FB, *pd = 0;\r
 317 \r
 318         // *hcache++ = code|(dx<<16)|(trow<<27); // cache it\r
 319         scrpos+=(*hc++)*LINE_WIDTH - START_ROW*LINE_WIDTH*8;\r
 320 \r
 321         while((code=*hc++)) {\r
 322                 if((short)code == blank) continue;\r
 323 \r
 324                 // y pos\r
 325                 if(((unsigned)code>>27) != prevy) {\r
 326                         prevy = (unsigned)code>>27;\r
 327                         pd = scrpos + prevy*LINE_WIDTH*8;\r
 328                 }\r
 329 \r
 330                 // Get tile address/2:\r
 331                 addr=(code&0x7ff)<<4;\r
 332 //              pal=PicoCramHigh+((code>>9)&0x30);\r
 333                 pal=(unsigned char)((code>>9)&0x30);\r
 334 \r
 335                 switch((code>>11)&3) {\r
 336                         case 0: zero=TileXnormYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r
 337                         case 1: zero=TileXflipYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r
 338                         case 2: zero=TileXnormYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r
 339                         case 3: zero=TileXflipYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r
 340                 }\r
 341 \r
 342                 if(zero) blank=(short)code;\r
 343         }\r
 344 }\r
 345 \r
 346 \r
 347 // sx and sy are coords of virtual screen with 8pix borders on top and on left\r
 348 static void DrawSpriteFull(unsigned int *sprite, struct PicoEState *est)\r
 349 {\r
 350         int width=0,height=0;\r
 351 //      unsigned short *pal=NULL;\r
 352         unsigned char pal;\r
 353         int tile,code,tdeltax,tdeltay;\r
 354         unsigned char *scrpos;\r
 355         int sx, sy;\r
 356 \r
 357         sy=sprite[0];\r
 358         height=sy>>24;\r
 359         sy=(sy&0x1ff)-0x78; // Y\r
 360         width=(height>>2)&3; height&=3;\r
 361         width++; height++; // Width and height in tiles\r
 362 \r
 363         code=sprite[1];\r
 364         sx=((code>>16)&0x1ff)-0x78; // X\r
 365 \r
 366         tile=code&0x7ff; // Tile number\r
 367         tdeltax=height; // Delta to increase tile by going right\r
 368         tdeltay=1;      // Delta to increase tile by going down\r
 369         if (code&0x0800) { tdeltax=-tdeltax; tile+=height*(width-1); } // Flip X\r
 370         if (code&0x1000) { tdeltay=-tdeltay; tile+=height-1; } // Flip Y\r
 371 \r
 372         //delta<<=4; // Delta of address\r
 373 //      pal=PicoCramHigh+((code>>9)&0x30); // Get palette pointer\r
 374         pal=(unsigned char)((code>>9)&0x30);\r
 375 \r
 376         // goto first vertically visible tile\r
 377         while(sy <= START_ROW*8) { sy+=8; tile+=tdeltay; height--; }\r
 378 \r
 379         scrpos = est->Draw2FB;\r
 380         scrpos+=(sy-START_ROW*8)*LINE_WIDTH;\r
 381 \r
 382         for (; height > 0; height--, sy+=8, tile+=tdeltay)\r
 383         {\r
 384                 int w = width, x=sx, t=tile;\r
 385 \r
 386                 if(sy >= END_ROW*8+8) return; // offscreen\r
 387 \r
 388                 for (; w; w--,x+=8,t+=tdeltax)\r
 389                 {\r
 390                         if(x<=0)   continue;\r
 391                         if(x>=328) break; // Offscreen\r
 392 \r
 393                         t&=0x7fff; // Clip tile address\r
 394                         switch((code>>11)&3) {\r
 395                                 case 0: TileXnormYnorm(scrpos+x,t<<4,pal); break;\r
 396                                 case 1: TileXflipYnorm(scrpos+x,t<<4,pal); break;\r
 397                                 case 2: TileXnormYflip(scrpos+x,t<<4,pal); break;\r
 398                                 case 3: TileXflipYflip(scrpos+x,t<<4,pal); break;\r
 399                         }\r
 400                 }\r
 401 \r
 402                 scrpos+=8*LINE_WIDTH;\r
 403         }\r
 404 }\r
 405 #endif\r
 406 \r
 407 \r
 408 static void DrawAllSpritesFull(int prio, int maxwidth)\r
 409 {\r
 410         struct PicoVideo *pvid=&Pico.video;\r
 411         int table=0,maskrange=0;\r
 412         int i,u,link=0;\r
 413         unsigned int *sprites[80]; // Sprites\r
 414         int y_min=START_ROW*8, y_max=END_ROW*8; // for a simple sprite masking\r
 415 \r
 416         table=pvid->reg[5]&0x7f;\r
 417         if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r
 418         table<<=8; // Get sprite table address/2\r
 419 \r
 420         for (i=u=0; u < 80; u++)\r
 421         {\r
 422                 unsigned int *sprite=NULL;\r
 423                 int code, code2, sx, sy, height;\r
 424 \r
 425                 sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r
 426 \r
 427                 // get sprite info\r
 428                 code = sprite[0];\r
 429 \r
 430                 // check if it is not hidden vertically\r
 431                 sy = (code&0x1ff)-0x80;\r
 432                 height = (((code>>24)&3)+1)<<3;\r
 433                 if(sy+height <= y_min || sy > y_max) goto nextsprite;\r
 434 \r
 435                 // masking sprite?\r
 436                 code2=sprite[1];\r
 437                 sx = (code2>>16)&0x1ff;\r
 438                 if(!sx) {\r
 439                         int to = sy+height; // sy ~ from\r
 440                         if(maskrange) {\r
 441                                 // try to merge with previous range\r
 442                                 if((maskrange>>16)+1 >= sy && (maskrange>>16) <= to && (maskrange&0xffff) < sy) sy = (maskrange&0xffff);\r
 443                                 else if((maskrange&0xffff)-1 <= to && (maskrange&0xffff) >= sy && (maskrange>>16) > to) to = (maskrange>>16);\r
 444                         }\r
 445                         // support only very simple masking (top and bottom of screen)\r
 446                         if(sy <= y_min && to+1 > y_min) y_min = to+1;\r
 447                         else if(to >= y_max && sy-1 < y_max) y_max = sy-1;\r
 448                         else maskrange=sy|(to<<16);\r
 449 \r
 450                         goto nextsprite;\r
 451                 }\r
 452 \r
 453                 // priority\r
 454                 if(((code2>>15)&1) != prio) goto nextsprite; // wrong priority\r
 455 \r
 456                 // check if sprite is not hidden horizontally\r
 457                 sx -= 0x78; // Get X coordinate + 8\r
 458                 if(sx <= -8*3 || sx >= maxwidth) goto nextsprite;\r
 459 \r
 460                 // sprite is good, save it's index\r
 461                 sprites[i++]=sprite;\r
 462 \r
 463                 nextsprite:\r
 464                 // Find next sprite\r
 465                 link=(code>>16)&0x7f;\r
 466                 if(!link) break; // End of sprites\r
 467         }\r
 468 \r
 469         // Go through sprites backwards:\r
 470         for (i--; i >= 0; i--)\r
 471         {\r
 472                 DrawSpriteFull(sprites[i], &Pico.est);\r
 473         }\r
 474 }\r
 475 \r
 476 #ifndef _ASM_DRAW_C\r
 477 static void BackFillFull(void *dst, int reg7)\r
 478 {\r
 479         unsigned int back;\r
 480 \r
 481         // Start with a background color:\r
 482         back=reg7&0x3f;\r
 483         back|=back<<8;\r
 484         back|=back<<16;\r
 485 \r
 486         memset32(dst, back, LINE_WIDTH*(8+(END_ROW-START_ROW)*8)/4);\r
 487 }\r
 488 #endif\r
 489 \r
 490 static void DrawDisplayFull(void)\r
 491 {\r
 492         struct PicoEState *est = &Pico.est;\r
 493         struct PicoVideo *pvid=&Pico.video;\r
 494         int win, edge=0, hvwin=0; // LSb->MSb: hwin&plane, vwin&plane, full\r
 495         int planestart=START_ROW, planeend=END_ROW; // plane A start/end when window shares display with plane A (in tile rows or columns)\r
 496         int winstart=START_ROW, winend=END_ROW;     // same for window\r
 497         int maxw, maxcolc; // max width and col cells\r
 498 \r
 499         if(pvid->reg[12]&1) {\r
 500                 maxw = 328; maxcolc = 40;\r
 501         } else {\r
 502                 maxw = 264; maxcolc = 32;\r
 503         }\r
 504 \r
 505         // horizontal window?\r
 506         if ((win=pvid->reg[0x12]))\r
 507         {\r
 508                 hvwin=1; // hwindow shares display with plane A\r
 509                 edge=win&0x1f;\r
 510                 if(win == 0x80) {\r
 511                         // fullscreen window\r
 512                         hvwin=4;\r
 513                 } else if(win < 0x80) {\r
 514                         // window on the top\r
 515                              if(edge <= START_ROW) hvwin=0; // window not visible in our drawing region\r
 516                         else if(edge >= END_ROW)   hvwin=4;\r
 517                         else planestart = winend = edge;\r
 518                 } else if(win > 0x80) {\r
 519                         // window at the bottom\r
 520                         if(edge >= END_ROW) hvwin=0;\r
 521                         else planeend = winstart = edge;\r
 522                 }\r
 523         }\r
 524 \r
 525         // check for vertical window, but only if win is not fullscreen\r
 526         if (hvwin != 4)\r
 527         {\r
 528                 win=pvid->reg[0x11];\r
 529                 edge=win&0x1f;\r
 530                 if (win&0x80) {\r
 531                         if(!edge) hvwin=4;\r
 532                         else if(edge < (maxcolc>>1)) {\r
 533                                 // window is on the right\r
 534                                 hvwin|=2;\r
 535                                 planeend|=edge<<17;\r
 536                                 winstart|=edge<<17;\r
 537                                 winend|=maxcolc<<16;\r
 538                         }\r
 539                 } else {\r
 540                         if(edge >= (maxcolc>>1)) hvwin=4;\r
 541                         else if(edge) {\r
 542                                 // window is on the left\r
 543                                 hvwin|=2;\r
 544                                 winend|=edge<<17;\r
 545                                 planestart|=edge<<17;\r
 546                                 planeend|=maxcolc<<16;\r
 547                         }\r
 548                 }\r
 549         }\r
 550 \r
 551         if (hvwin==1) { winend|=maxcolc<<16; planeend|=maxcolc<<16; }\r
 552 \r
 553         HighCache2A[1] = HighCache2B[1] = 0;\r
 554         if (!(pvid->debug_p & PVD_KILL_B))\r
 555                 DrawLayerFull(1, HighCache2B, START_ROW, (maxcolc<<16)|END_ROW, est);\r
 556         if (!(pvid->debug_p & PVD_KILL_A)) switch (hvwin)\r
 557         {\r
 558                 case 4:\r
 559                 // fullscreen window\r
 560                 DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 0, est);\r
 561                 break;\r
 562 \r
 563                 case 3:\r
 564                 // we have plane A and both v and h windows\r
 565                 DrawLayerFull(0, HighCache2A, planestart, planeend, est);\r
 566                 DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 0, est); // h\r
 567                 DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 0, est);    // v\r
 568                 break;\r
 569 \r
 570                 case 2:\r
 571                 case 1:\r
 572                 // both window and plane A visible, window is vertical XOR horizontal\r
 573                 DrawLayerFull(0, HighCache2A, planestart, planeend, est);\r
 574                 DrawWindowFull(winstart, winend, 0, est);\r
 575                 break;\r
 576 \r
 577                 default:\r
 578                 // fullscreen plane A\r
 579                 DrawLayerFull(0, HighCache2A, START_ROW, (maxcolc<<16)|END_ROW, est);\r
 580                 break;\r
 581         }\r
 582         if (!(pvid->debug_p & PVD_KILL_S_LO))\r
 583                 DrawAllSpritesFull(0, maxw);\r
 584 \r
 585         if (HighCache2B[1]) DrawTilesFromCacheF(HighCache2B, est);\r
 586         if (HighCache2A[1]) DrawTilesFromCacheF(HighCache2A, est);\r
 587         if (!(pvid->debug_p & PVD_KILL_A)) switch (hvwin)\r
 588         {\r
 589                 case 4:\r
 590                 // fullscreen window\r
 591                 DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 1, est);\r
 592                 break;\r
 593 \r
 594                 case 3:\r
 595                 // we have plane A and both v and h windows\r
 596                 DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 1, est); // h\r
 597                 DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 1, est);    // v\r
 598                 break;\r
 599 \r
 600                 case 2:\r
 601                 case 1:\r
 602                 // both window and plane A visible, window is vertical XOR horizontal\r
 603                 DrawWindowFull(winstart, winend, 1, est);\r
 604                 break;\r
 605         }\r
 606         if (!(pvid->debug_p & PVD_KILL_S_HI))\r
 607                 DrawAllSpritesFull(1, maxw);\r
 608 }\r
 609 \r
 610 \r
 611 PICO_INTERNAL void PicoFrameFull()\r
 612 {\r
 613         pprof_start(draw);\r
 614 \r
 615         // prepare cram?\r
 616         if (PicoPrepareCram) PicoPrepareCram();\r
 617 \r
 618         // Draw screen:\r
 619         BackFillFull(Pico.est.Draw2FB, Pico.video.reg[7]);\r
 620         if (Pico.video.reg[1] & 0x40)\r
 621                 DrawDisplayFull();\r
 622 \r
 623         pprof_end(draw);\r
 624 }\r
 625 \r
 626 void PicoDraw2Init(void)\r
 627 {\r
 628         Pico.est.Draw2FB = PicoDraw2FB_;\r
 629 }\r