| 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 | #include <assert.h>\r |
| 14 | #ifndef __GNUC__\r |
| 15 | #pragma warning (disable:4706) // Disable assignment within conditional\r |
| 16 | #endif\r |
| 17 | \r |
| 18 | // port_config.h include must define these 2 defines:\r |
| 19 | // #define START_ROW 1 // which row of tiles to start rendering at?\r |
| 20 | // #define END_ROW 27 // ..end\r |
| 21 | // one row means 8 pixels. If above example was used, (27-1)*8=208 lines would be rendered.\r |
| 22 | \r |
| 23 | #define TILE_ROWS END_ROW-START_ROW\r |
| 24 | \r |
| 25 | #define USE_CACHE\r |
| 26 | \r |
| 27 | \r |
| 28 | extern unsigned char *framebuff; // in format (8+320)x(8+224+8) (eights for borders)\r |
| 29 | int currpri = 0;\r |
| 30 | \r |
| 31 | static int HighCacheA[41*(TILE_ROWS+1)+1+1]; // caches for high layers\r |
| 32 | static int HighCacheB[41*(TILE_ROWS+1)+1+1];\r |
| 33 | \r |
| 34 | unsigned short *PicoCramHigh=Pico.cram; // pointer to CRAM buff (0x40 shorts), converted to native device color (works only with 16bit for now)\r |
| 35 | void (*PicoPrepareCram)()=0; // prepares PicoCramHigh for renderer to use\r |
| 36 | \r |
| 37 | \r |
| 38 | // stuff available in asm:\r |
| 39 | #ifdef _ASM_DRAW_C\r |
| 40 | void BackFillFull(int reg7);\r |
| 41 | void DrawLayerFull(int plane, int *hcache, int planestart, int planeend);\r |
| 42 | void DrawTilesFromCacheF(int *hc);\r |
| 43 | void DrawWindowFull(int start, int end, int prio);\r |
| 44 | void DrawSpriteFull(unsigned int *sprite);\r |
| 45 | #else\r |
| 46 | \r |
| 47 | \r |
| 48 | static int TileXnormYnorm(unsigned char *pd,int addr,unsigned char pal)\r |
| 49 | {\r |
| 50 | unsigned int pack=0; unsigned int t=0, blank = 1;\r |
| 51 | int i;\r |
| 52 | \r |
| 53 | for(i=8; i; i--, addr+=2, pd += 320+8) {\r |
| 54 | pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r |
| 55 | if(!pack) continue;\r |
| 56 | \r |
| 57 | t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);\r |
| 58 | t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);\r |
| 59 | t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);\r |
| 60 | t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t )|pal);\r |
| 61 | t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);\r |
| 62 | t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);\r |
| 63 | t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);\r |
| 64 | t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);\r |
| 65 | blank = 0;\r |
| 66 | }\r |
| 67 | \r |
| 68 | return blank; // Tile blank?\r |
| 69 | }\r |
| 70 | \r |
| 71 | static int TileXflipYnorm(unsigned char *pd,int addr,unsigned char pal)\r |
| 72 | {\r |
| 73 | unsigned int pack=0; unsigned int t=0, blank = 1;\r |
| 74 | int i;\r |
| 75 | \r |
| 76 | for(i=8; i; i--, addr+=2, pd += 320+8) {\r |
| 77 | pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r |
| 78 | if(!pack) continue;\r |
| 79 | \r |
| 80 | t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);\r |
| 81 | t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);\r |
| 82 | t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);\r |
| 83 | t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);\r |
| 84 | t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t )|pal);\r |
| 85 | t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);\r |
| 86 | t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);\r |
| 87 | t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);\r |
| 88 | blank = 0;\r |
| 89 | }\r |
| 90 | return blank; // Tile blank?\r |
| 91 | }\r |
| 92 | \r |
| 93 | static int TileXnormYflip(unsigned char *pd,int addr,unsigned char pal)\r |
| 94 | {\r |
| 95 | unsigned int pack=0; unsigned int t=0, blank = 1;\r |
| 96 | int i;\r |
| 97 | \r |
| 98 | addr+=14;\r |
| 99 | for(i=8; i; i--, addr-=2, pd += 320+8) {\r |
| 100 | pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r |
| 101 | if(!pack) continue;\r |
| 102 | \r |
| 103 | t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);\r |
| 104 | t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);\r |
| 105 | t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);\r |
| 106 | t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t )|pal);\r |
| 107 | t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);\r |
| 108 | t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);\r |
| 109 | t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);\r |
| 110 | t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);\r |
| 111 | blank = 0;\r |
| 112 | }\r |
| 113 | \r |
| 114 | return blank; // Tile blank?\r |
| 115 | }\r |
| 116 | \r |
| 117 | static int TileXflipYflip(unsigned char *pd,int addr,unsigned char pal)\r |
| 118 | {\r |
| 119 | unsigned int pack=0; unsigned int t=0, blank = 1;\r |
| 120 | int i;\r |
| 121 | \r |
| 122 | addr+=14;\r |
| 123 | for(i=8; i; i--, addr-=2, pd += 320+8) {\r |
| 124 | pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r |
| 125 | if(!pack) continue;\r |
| 126 | \r |
| 127 | t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);\r |
| 128 | t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);\r |
| 129 | t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);\r |
| 130 | t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);\r |
| 131 | t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t )|pal);\r |
| 132 | t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);\r |
| 133 | t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);\r |
| 134 | t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);\r |
| 135 | blank = 0;\r |
| 136 | }\r |
| 137 | return blank; // Tile blank?\r |
| 138 | }\r |
| 139 | \r |
| 140 | \r |
| 141 | // start: (tile_start<<16)|row_start, end: [same]\r |
| 142 | static void DrawWindowFull(int start, int end, int prio)\r |
| 143 | {\r |
| 144 | struct PicoVideo *pvid=&Pico.video;\r |
| 145 | int nametab, nametab_step, trow, tilex, blank=-1, code;\r |
| 146 | unsigned char *scrpos = framebuff;\r |
| 147 | int tile_start, tile_end; // in cells\r |
| 148 | \r |
| 149 | // parse ranges\r |
| 150 | tile_start = start>>16;\r |
| 151 | tile_end = end>>16;\r |
| 152 | start = start<<16>>16;\r |
| 153 | end = end<<16>>16;\r |
| 154 | \r |
| 155 | // Find name table line:\r |
| 156 | if (pvid->reg[12]&1)\r |
| 157 | {\r |
| 158 | nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode\r |
| 159 | nametab_step = 1<<6;\r |
| 160 | }\r |
| 161 | else\r |
| 162 | {\r |
| 163 | nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode\r |
| 164 | nametab_step = 1<<5;\r |
| 165 | }\r |
| 166 | nametab += nametab_step*start;\r |
| 167 | \r |
| 168 | // check priority\r |
| 169 | code=Pico.vram[nametab+tile_start];\r |
| 170 | if ((code>>15) != prio) return; // hack: just assume that whole window uses same priority\r |
| 171 | \r |
| 172 | scrpos+=8*328+8;\r |
| 173 | scrpos+=8*328*(start-START_ROW);\r |
| 174 | \r |
| 175 | // do a window until we reach planestart row\r |
| 176 | for(trow = start; trow < end; trow++, nametab+=nametab_step) { // current tile row\r |
| 177 | for (tilex=tile_start; tilex<tile_end; tilex++)\r |
| 178 | {\r |
| 179 | int code,addr,zero=0;\r |
| 180 | // unsigned short *pal=NULL;\r |
| 181 | unsigned char pal;\r |
| 182 | \r |
| 183 | code=Pico.vram[nametab+tilex];\r |
| 184 | if (code==blank) continue;\r |
| 185 | \r |
| 186 | // Get tile address/2:\r |
| 187 | addr=(code&0x7ff)<<4;\r |
| 188 | \r |
| 189 | // pal=PicoCramHigh+((code>>9)&0x30);\r |
| 190 | pal=(unsigned char)((code>>9)&0x30);\r |
| 191 | \r |
| 192 | switch((code>>11)&3) {\r |
| 193 | case 0: zero=TileXnormYnorm(scrpos+(tilex<<3),addr,pal); break;\r |
| 194 | case 1: zero=TileXflipYnorm(scrpos+(tilex<<3),addr,pal); break;\r |
| 195 | case 2: zero=TileXnormYflip(scrpos+(tilex<<3),addr,pal); break;\r |
| 196 | case 3: zero=TileXflipYflip(scrpos+(tilex<<3),addr,pal); break;\r |
| 197 | }\r |
| 198 | if(zero) blank=code; // We know this tile is blank now\r |
| 199 | }\r |
| 200 | \r |
| 201 | scrpos += 328*8;\r |
| 202 | }\r |
| 203 | }\r |
| 204 | \r |
| 205 | \r |
| 206 | static void DrawLayerFull(int plane, int *hcache, int planestart, int planeend)\r |
| 207 | {\r |
| 208 | struct PicoVideo *pvid=&Pico.video;\r |
| 209 | static char shift[4]={5,6,6,7}; // 32,64 or 128 sized tilemaps\r |
| 210 | int width, height, ymask, htab;\r |
| 211 | int nametab, hscroll=0, vscroll, cells;\r |
| 212 | unsigned char *scrpos;\r |
| 213 | int blank=-1, xmask, nametab_row, trow;\r |
| 214 | \r |
| 215 | // parse ranges\r |
| 216 | cells = (planeend>>16)-(planestart>>16);\r |
| 217 | planestart = planestart<<16>>16;\r |
| 218 | planeend = planeend<<16>>16;\r |
| 219 | \r |
| 220 | // Work out the Tiles to draw\r |
| 221 | \r |
| 222 | htab=pvid->reg[13]<<9; // Horizontal scroll table address\r |
| 223 | // if ( pvid->reg[11]&2) htab+=Scanline<<1; // Offset by line\r |
| 224 | // if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile\r |
| 225 | htab+=plane; // A or B\r |
| 226 | \r |
| 227 | if(!(pvid->reg[11]&3)) { // full screen scroll\r |
| 228 | // Get horizontal scroll value\r |
| 229 | hscroll=Pico.vram[htab&0x7fff];\r |
| 230 | htab = 0; // this marks that we don't have to update scroll value\r |
| 231 | }\r |
| 232 | \r |
| 233 | // Work out the name table size: 32 64 or 128 tiles (0-3)\r |
| 234 | width=pvid->reg[16];\r |
| 235 | height=(width>>4)&3; width&=3;\r |
| 236 | \r |
| 237 | xmask=(1<<shift[width ])-1; // X Mask in tiles\r |
| 238 | ymask=(height<<5)|0x1f; // Y Mask in tiles\r |
| 239 | if(width == 1) ymask&=0x3f;\r |
| 240 | else if(width>1) ymask =0x1f;\r |
| 241 | \r |
| 242 | // Find name table:\r |
| 243 | if (plane==0) nametab=(pvid->reg[2]&0x38)<< 9; // A\r |
| 244 | else nametab=(pvid->reg[4]&0x07)<<12; // B\r |
| 245 | \r |
| 246 | scrpos = framebuff;\r |
| 247 | scrpos+=8*328*(planestart-START_ROW);\r |
| 248 | \r |
| 249 | // Get vertical scroll value:\r |
| 250 | vscroll=Pico.vsram[plane]&0x1ff;\r |
| 251 | scrpos+=(8-(vscroll&7))*328;\r |
| 252 | if(vscroll&7) planeend++; // we have vertically clipped tiles due to vscroll, so we need 1 more row\r |
| 253 | \r |
| 254 | *hcache++ = 8-(vscroll&7); // push y-offset to tilecache\r |
| 255 | \r |
| 256 | \r |
| 257 | for(trow = planestart; trow < planeend; trow++) { // current tile row\r |
| 258 | int cellc=cells,tilex,dx;\r |
| 259 | \r |
| 260 | // Find the tile row in the name table\r |
| 261 | //ts.line=(vscroll+Scanline)&ymask;\r |
| 262 | //ts.nametab+=(ts.line>>3)<<shift[width];\r |
| 263 | nametab_row = nametab + (((trow+(vscroll>>3))&ymask)<<shift[width]); // pointer to nametable entries for this row\r |
| 264 | \r |
| 265 | // update hscroll if needed\r |
| 266 | if(htab) {\r |
| 267 | int htaddr=htab+(trow<<4);\r |
| 268 | if(trow) htaddr-=(vscroll&7)<<1;\r |
| 269 | hscroll=Pico.vram[htaddr&0x7fff];\r |
| 270 | }\r |
| 271 | \r |
| 272 | // Draw tiles across screen:\r |
| 273 | tilex=(-hscroll)>>3;\r |
| 274 | dx=((hscroll-1)&7)+1;\r |
| 275 | if(dx != 8) cellc++; // have hscroll, do more cells\r |
| 276 | \r |
| 277 | for (; cellc; dx+=8,tilex++,cellc--)\r |
| 278 | {\r |
| 279 | int code=0,addr=0,zero=0;\r |
| 280 | // unsigned short *pal=NULL;\r |
| 281 | unsigned char pal;\r |
| 282 | \r |
| 283 | code=Pico.vram[nametab_row+(tilex&xmask)];\r |
| 284 | if (code==blank) continue;\r |
| 285 | \r |
| 286 | #ifdef USE_CACHE\r |
| 287 | if (code>>15) { // high priority tile\r |
| 288 | *hcache++ = code|(dx<<16)|(trow<<27); // cache it\r |
| 289 | #else\r |
| 290 | if ((code>>15) != currpri) {\r |
| 291 | #endif\r |
| 292 | continue;\r |
| 293 | }\r |
| 294 | \r |
| 295 | // Get tile address/2:\r |
| 296 | addr=(code&0x7ff)<<4;\r |
| 297 | \r |
| 298 | // pal=PicoCramHigh+((code>>9)&0x30);\r |
| 299 | pal=(unsigned char)((code>>9)&0x30);\r |
| 300 | \r |
| 301 | switch((code>>11)&3) {\r |
| 302 | case 0: zero=TileXnormYnorm(scrpos+dx,addr,pal); break;\r |
| 303 | case 1: zero=TileXflipYnorm(scrpos+dx,addr,pal); break;\r |
| 304 | case 2: zero=TileXnormYflip(scrpos+dx,addr,pal); break;\r |
| 305 | case 3: zero=TileXflipYflip(scrpos+dx,addr,pal); break;\r |
| 306 | }\r |
| 307 | if(zero) blank=code; // We know this tile is blank now\r |
| 308 | }\r |
| 309 | \r |
| 310 | scrpos += 328*8;\r |
| 311 | }\r |
| 312 | \r |
| 313 | *hcache = 0; // terminate cache\r |
| 314 | }\r |
| 315 | \r |
| 316 | \r |
| 317 | static void DrawTilesFromCacheF(int *hc)\r |
| 318 | {\r |
| 319 | int code, addr, zero = 0;\r |
| 320 | unsigned int prevy=0xFFFFFFFF;\r |
| 321 | // unsigned short *pal;\r |
| 322 | unsigned char pal;\r |
| 323 | short blank=-1; // The tile we know is blank\r |
| 324 | unsigned char *scrpos = framebuff, *pd = 0;\r |
| 325 | \r |
| 326 | // *hcache++ = code|(dx<<16)|(trow<<27); // cache it\r |
| 327 | scrpos+=(*hc++)*328 - START_ROW*328*8;\r |
| 328 | \r |
| 329 | while((code=*hc++)) {\r |
| 330 | if((short)code == blank) continue;\r |
| 331 | \r |
| 332 | // y pos\r |
| 333 | if(((unsigned)code>>27) != prevy) {\r |
| 334 | prevy = (unsigned)code>>27;\r |
| 335 | pd = scrpos + prevy*328*8;\r |
| 336 | }\r |
| 337 | \r |
| 338 | // Get tile address/2:\r |
| 339 | addr=(code&0x7ff)<<4;\r |
| 340 | // pal=PicoCramHigh+((code>>9)&0x30);\r |
| 341 | pal=(unsigned char)((code>>9)&0x30);\r |
| 342 | \r |
| 343 | switch((code>>11)&3) {\r |
| 344 | case 0: zero=TileXnormYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r |
| 345 | case 1: zero=TileXflipYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r |
| 346 | case 2: zero=TileXnormYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r |
| 347 | case 3: zero=TileXflipYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r |
| 348 | }\r |
| 349 | \r |
| 350 | if(zero) blank=(short)code;\r |
| 351 | }\r |
| 352 | }\r |
| 353 | \r |
| 354 | \r |
| 355 | // sx and sy are coords of virtual screen with 8pix borders on top and on left\r |
| 356 | static void DrawSpriteFull(unsigned int *sprite)\r |
| 357 | {\r |
| 358 | int width=0,height=0;\r |
| 359 | // unsigned short *pal=NULL;\r |
| 360 | unsigned char pal;\r |
| 361 | int tile,code,tdeltax,tdeltay;\r |
| 362 | unsigned char *scrpos;\r |
| 363 | int sx, sy;\r |
| 364 | \r |
| 365 | sy=sprite[0];\r |
| 366 | height=sy>>24;\r |
| 367 | sy=(sy&0x1ff)-0x78; // Y\r |
| 368 | width=(height>>2)&3; height&=3;\r |
| 369 | width++; height++; // Width and height in tiles\r |
| 370 | \r |
| 371 | code=sprite[1];\r |
| 372 | sx=((code>>16)&0x1ff)-0x78; // X\r |
| 373 | \r |
| 374 | tile=code&0x7ff; // Tile number\r |
| 375 | tdeltax=height; // Delta to increase tile by going right\r |
| 376 | tdeltay=1; // Delta to increase tile by going down\r |
| 377 | if (code&0x0800) { tdeltax=-tdeltax; tile+=height*(width-1); } // Flip X\r |
| 378 | if (code&0x1000) { tdeltay=-tdeltay; tile+=height-1; } // Flip Y\r |
| 379 | \r |
| 380 | //delta<<=4; // Delta of address\r |
| 381 | // pal=PicoCramHigh+((code>>9)&0x30); // Get palette pointer\r |
| 382 | pal=(unsigned char)((code>>9)&0x30);\r |
| 383 | \r |
| 384 | // goto first vertically visible tile\r |
| 385 | while(sy <= START_ROW*8) { sy+=8; tile+=tdeltay; height--; }\r |
| 386 | \r |
| 387 | scrpos = framebuff;\r |
| 388 | scrpos+=(sy-START_ROW*8)*328;\r |
| 389 | \r |
| 390 | for (; height > 0; height--, sy+=8, tile+=tdeltay)\r |
| 391 | {\r |
| 392 | int w = width, x=sx, t=tile;\r |
| 393 | \r |
| 394 | if(sy >= END_ROW*8+8) return; // offscreen\r |
| 395 | \r |
| 396 | for (; w; w--,x+=8,t+=tdeltax)\r |
| 397 | {\r |
| 398 | if(x<=0) continue;\r |
| 399 | if(x>=328) break; // Offscreen\r |
| 400 | \r |
| 401 | t&=0x7fff; // Clip tile address\r |
| 402 | switch((code>>11)&3) {\r |
| 403 | case 0: TileXnormYnorm(scrpos+x,t<<4,pal); break;\r |
| 404 | case 1: TileXflipYnorm(scrpos+x,t<<4,pal); break;\r |
| 405 | case 2: TileXnormYflip(scrpos+x,t<<4,pal); break;\r |
| 406 | case 3: TileXflipYflip(scrpos+x,t<<4,pal); break;\r |
| 407 | }\r |
| 408 | }\r |
| 409 | \r |
| 410 | scrpos+=8*328;\r |
| 411 | }\r |
| 412 | }\r |
| 413 | #endif\r |
| 414 | \r |
| 415 | \r |
| 416 | static void DrawAllSpritesFull(int prio, int maxwidth)\r |
| 417 | {\r |
| 418 | struct PicoVideo *pvid=&Pico.video;\r |
| 419 | int table=0,maskrange=0;\r |
| 420 | int i,u,link=0;\r |
| 421 | unsigned int *sprites[80]; // Sprites\r |
| 422 | int y_min=START_ROW*8, y_max=END_ROW*8; // for a simple sprite masking\r |
| 423 | \r |
| 424 | table=pvid->reg[5]&0x7f;\r |
| 425 | if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r |
| 426 | table<<=8; // Get sprite table address/2\r |
| 427 | \r |
| 428 | for (i=u=0; u < 80; u++)\r |
| 429 | {\r |
| 430 | unsigned int *sprite=NULL;\r |
| 431 | int code, code2, sx, sy, height;\r |
| 432 | \r |
| 433 | sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r |
| 434 | \r |
| 435 | // get sprite info\r |
| 436 | code = sprite[0];\r |
| 437 | \r |
| 438 | // check if it is not hidden vertically\r |
| 439 | sy = (code&0x1ff)-0x80;\r |
| 440 | height = (((code>>24)&3)+1)<<3;\r |
| 441 | if(sy+height <= y_min || sy > y_max) goto nextsprite;\r |
| 442 | \r |
| 443 | // masking sprite?\r |
| 444 | code2=sprite[1];\r |
| 445 | sx = (code2>>16)&0x1ff;\r |
| 446 | if(!sx) {\r |
| 447 | int to = sy+height; // sy ~ from\r |
| 448 | if(maskrange) {\r |
| 449 | // try to merge with previous range\r |
| 450 | if((maskrange>>16)+1 >= sy && (maskrange>>16) <= to && (maskrange&0xffff) < sy) sy = (maskrange&0xffff);\r |
| 451 | else if((maskrange&0xffff)-1 <= to && (maskrange&0xffff) >= sy && (maskrange>>16) > to) to = (maskrange>>16);\r |
| 452 | }\r |
| 453 | // support only very simple masking (top and bottom of screen)\r |
| 454 | if(sy <= y_min && to+1 > y_min) y_min = to+1;\r |
| 455 | else if(to >= y_max && sy-1 < y_max) y_max = sy-1;\r |
| 456 | else maskrange=sy|(to<<16);\r |
| 457 | \r |
| 458 | goto nextsprite;\r |
| 459 | }\r |
| 460 | \r |
| 461 | // priority\r |
| 462 | if(((code2>>15)&1) != prio) goto nextsprite; // wrong priority\r |
| 463 | \r |
| 464 | // check if sprite is not hidden horizontally\r |
| 465 | sx -= 0x78; // Get X coordinate + 8\r |
| 466 | if(sx <= -8*3 || sx >= maxwidth) goto nextsprite;\r |
| 467 | \r |
| 468 | // sprite is good, save it's index\r |
| 469 | sprites[i++]=sprite;\r |
| 470 | \r |
| 471 | nextsprite:\r |
| 472 | // Find next sprite\r |
| 473 | link=(code>>16)&0x7f;\r |
| 474 | if(!link) break; // End of sprites\r |
| 475 | }\r |
| 476 | \r |
| 477 | // Go through sprites backwards:\r |
| 478 | for (i-- ;i>=0; i--)\r |
| 479 | {\r |
| 480 | DrawSpriteFull(sprites[i]);\r |
| 481 | }\r |
| 482 | }\r |
| 483 | \r |
| 484 | #ifndef _ASM_DRAW_C\r |
| 485 | static void BackFillFull(int reg7)\r |
| 486 | {\r |
| 487 | unsigned int back, i;\r |
| 488 | unsigned int *p=(unsigned int *)framebuff;\r |
| 489 | \r |
| 490 | // Start with a background color:\r |
| 491 | // back=PicoCramHigh[reg7&0x3f];\r |
| 492 | back=reg7&0x3f;\r |
| 493 | back|=back<<8;\r |
| 494 | back|=back<<16;\r |
| 495 | \r |
| 496 | for(i = (8+320)*(8+(END_ROW-START_ROW)*8)/16; i; i--) {\r |
| 497 | *p++ = back; // do 16 pixels per iteration\r |
| 498 | *p++ = back;\r |
| 499 | *p++ = back;\r |
| 500 | *p++ = back;\r |
| 501 | }\r |
| 502 | }\r |
| 503 | #endif\r |
| 504 | \r |
| 505 | static void DrawDisplayFull()\r |
| 506 | {\r |
| 507 | struct PicoVideo *pvid=&Pico.video;\r |
| 508 | int win, edge=0, hvwin=0; // LSb->MSb: hwin&plane, vwin&plane, full\r |
| 509 | int planestart=START_ROW, planeend=END_ROW; // plane A start/end when window shares display with plane A (in tile rows or columns)\r |
| 510 | int winstart=START_ROW, winend=END_ROW; // same for window\r |
| 511 | int maxw, maxcolc; // max width and col cells\r |
| 512 | \r |
| 513 | if(pvid->reg[12]&1) {\r |
| 514 | maxw = 328; maxcolc = 40;\r |
| 515 | } else {\r |
| 516 | maxw = 264; maxcolc = 32;\r |
| 517 | }\r |
| 518 | \r |
| 519 | // horizontal window?\r |
| 520 | if((win=pvid->reg[0x12])) {\r |
| 521 | hvwin=1; // hwindow shares display with plane A\r |
| 522 | edge=win&0x1f;\r |
| 523 | if(win == 0x80) {\r |
| 524 | // fullscreen window\r |
| 525 | hvwin=4;\r |
| 526 | } else if(win < 0x80) {\r |
| 527 | // window on the top\r |
| 528 | if(edge <= START_ROW) hvwin=0; // window not visible in our drawing region\r |
| 529 | else if(edge >= END_ROW) hvwin=4;\r |
| 530 | else planestart = winend = edge;\r |
| 531 | } else if(win > 0x80) {\r |
| 532 | // window at the bottom\r |
| 533 | if(edge >= END_ROW) hvwin=0;\r |
| 534 | else planeend = winstart = edge;\r |
| 535 | }\r |
| 536 | }\r |
| 537 | \r |
| 538 | // check for vertical window, but only if win is not fullscreen\r |
| 539 | if(hvwin != 4) {\r |
| 540 | win=pvid->reg[0x11];\r |
| 541 | edge=win&0x1f;\r |
| 542 | if (win&0x80) {\r |
| 543 | if(!edge) hvwin=4;\r |
| 544 | else if(edge < (maxcolc>>1)) {\r |
| 545 | // window is on the right\r |
| 546 | hvwin|=2;\r |
| 547 | planeend|=edge<<17;\r |
| 548 | winstart|=edge<<17;\r |
| 549 | winend|=maxcolc<<16;\r |
| 550 | }\r |
| 551 | } else {\r |
| 552 | if(edge >= (maxcolc>>1)) hvwin=4;\r |
| 553 | else if(edge) {\r |
| 554 | // window is on the left\r |
| 555 | hvwin|=2;\r |
| 556 | winend|=edge<<17;\r |
| 557 | planestart|=edge<<17;\r |
| 558 | planeend|=maxcolc<<16;\r |
| 559 | }\r |
| 560 | }\r |
| 561 | }\r |
| 562 | \r |
| 563 | if(hvwin==1) { winend|=maxcolc<<16; planeend|=maxcolc<<16; }\r |
| 564 | \r |
| 565 | currpri = 0;\r |
| 566 | DrawLayerFull(1, HighCacheB, START_ROW, (maxcolc<<16)|END_ROW);\r |
| 567 | switch(hvwin) {\r |
| 568 | case 4:\r |
| 569 | // fullscreen window\r |
| 570 | DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 0);\r |
| 571 | HighCacheA[1] = 0;\r |
| 572 | break;\r |
| 573 | \r |
| 574 | case 3:\r |
| 575 | // we have plane A and both v and h windows\r |
| 576 | DrawLayerFull(0, HighCacheA, planestart, planeend);\r |
| 577 | DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 0); // h\r |
| 578 | DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 0); // v\r |
| 579 | break;\r |
| 580 | \r |
| 581 | case 2:\r |
| 582 | case 1:\r |
| 583 | // both window and plane A visible, window is vertical XOR horizontal\r |
| 584 | DrawLayerFull(0, HighCacheA, planestart, planeend);\r |
| 585 | DrawWindowFull(winstart, winend, 0);\r |
| 586 | break;\r |
| 587 | \r |
| 588 | default:\r |
| 589 | // fullscreen plane A\r |
| 590 | DrawLayerFull(0, HighCacheA, START_ROW, (maxcolc<<16)|END_ROW);\r |
| 591 | break;\r |
| 592 | }\r |
| 593 | DrawAllSpritesFull(0, maxw);\r |
| 594 | \r |
| 595 | #ifdef USE_CACHE\r |
| 596 | if(HighCacheB[1]) DrawTilesFromCacheF(HighCacheB);\r |
| 597 | if(HighCacheA[1]) DrawTilesFromCacheF(HighCacheA);\r |
| 598 | switch(hvwin) {\r |
| 599 | case 4:\r |
| 600 | // fullscreen window\r |
| 601 | DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 1);\r |
| 602 | break;\r |
| 603 | \r |
| 604 | case 3:\r |
| 605 | // we have plane A and both v and h windows\r |
| 606 | DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 1); // h\r |
| 607 | DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 1); // v\r |
| 608 | break;\r |
| 609 | \r |
| 610 | case 2:\r |
| 611 | case 1:\r |
| 612 | // both window and plane A visible, window is vertical XOR horizontal\r |
| 613 | DrawWindowFull(winstart, winend, 1);\r |
| 614 | break;\r |
| 615 | }\r |
| 616 | #else\r |
| 617 | currpri = 1;\r |
| 618 | // TODO\r |
| 619 | #endif\r |
| 620 | DrawAllSpritesFull(1, maxw);\r |
| 621 | }\r |
| 622 | \r |
| 623 | \r |
| 624 | void PicoFrameFull()\r |
| 625 | {\r |
| 626 | // prepare cram?\r |
| 627 | if(PicoPrepareCram) PicoPrepareCram();\r |
| 628 | \r |
| 629 | // Draw screen:\r |
| 630 | BackFillFull(Pico.video.reg[7]);\r |
| 631 | if (Pico.video.reg[1]&0x40) DrawDisplayFull();\r |
| 632 | }\r |
| 633 | \r |