Pico/cd/gfx_cd.c

   1 // TODO...
   2
   3 // #include <string.h>
   4 #include "../PicoInt.h"
   5
   6 #define rot_comp Pico_mcd->rot_comp
   7
   8 static const int Table_Rot_Time[] =
   9 {
  10         0x00054000, 0x00048000, 0x00040000, 0x00036000,          //; 008-032               ; briefing - sprite
  11         0x0002E000, 0x00028000, 0x00024000, 0x00022000,          //; 036-064               ; arbre souvent
  12         0x00021000, 0x00020000, 0x0001E000, 0x0001B800,          //; 068-096               ; map thunderstrike
  13         0x00019800, 0x00017A00, 0x00015C00, 0x00013E00,          //; 100-128               ; logo défoncé
  14
  15         0x00012000, 0x00011800, 0x00011000, 0x00010800,          //; 132-160               ; briefing - map
  16         0x00010000, 0x0000F800, 0x0000F000, 0x0000E800,          //; 164-192
  17         0x0000E000, 0x0000D800, 0x0000D000, 0x0000C800,          //; 196-224
  18         0x0000C000, 0x0000B800, 0x0000B000, 0x0000A800,          //; 228-256               ; batman visage
  19
  20         0x0000A000, 0x00009F00, 0x00009E00, 0x00009D00,          //; 260-288
  21         0x00009C00, 0x00009B00, 0x00009A00, 0x00009900,          //; 292-320
  22         0x00009800, 0x00009700, 0x00009600, 0x00009500,          //; 324-352
  23         0x00009400, 0x00009300, 0x00009200, 0x00009100,          //; 356-384
  24
  25         0x00009000, 0x00008F00, 0x00008E00, 0x00008D00,          //; 388-416
  26         0x00008C00, 0x00008B00, 0x00008A00, 0x00008900,          //; 420-448
  27         0x00008800, 0x00008700, 0x00008600, 0x00008500,          //; 452-476
  28         0x00008400, 0x00008300, 0x00008200, 0x00008100,          //; 480-512
  29 };
  30
  31
  32 static void gfx_cd_start(void)
  33 {
  34         int upd_len;
  35
  36         dprintf("gfx_cd_start()");
  37
  38         // rot_comp.XD_Mul = ((rot_comp.Reg_5C & 0x1f) + 1) * 4; // unused
  39         rot_comp.Function = (rot_comp.Reg_58 & 7) | (Pico_mcd->s68k_regs[3] & 0x18);    // Jmp_Adr
  40         // rot_comp.Buffer_Adr = (rot_comp.Reg_5E & 0xfff8) << 2; // unused?
  41         rot_comp.YD = (rot_comp.Reg_60 >> 3) & 7;
  42         rot_comp.Vector_Adr = (rot_comp.Reg_66 & 0xfffe) << 2;
  43
  44         upd_len = (rot_comp.Reg_62 >> 3) & 0x3f;
  45         upd_len = Table_Rot_Time[upd_len];
  46         rot_comp.Draw_Speed = rot_comp.Float_Part = upd_len;
  47
  48         rot_comp.Reg_58 |= 0x8000;      // Stamp_Size,  we start a new GFX operation
  49
  50         switch (rot_comp.Reg_58 & 6)    // Scr_16?
  51         {
  52                 case 0: // ?
  53                         rot_comp.Stamp_Map_Adr = (rot_comp.Reg_5A & 0xff80) << 2;
  54                         break;
  55                 case 2: // .Dot_32
  56                         rot_comp.Stamp_Map_Adr = (rot_comp.Reg_5A & 0xffe0) << 2;
  57                         break;
  58                 case 4: // .Scr_16
  59                         rot_comp.Stamp_Map_Adr = 0x20000;
  60                         break;
  61                 case 6: // .Scr_16_Dot_32
  62                         rot_comp.Stamp_Map_Adr = (rot_comp.Reg_5A & 0xe000) << 2;
  63                         break;
  64         }
  65
  66         gfx_cd_update();
  67 }
  68
  69
  70 static void gfx_completed(void)
  71 {
  72         rot_comp.Reg_58 &= 0x7fff;      // Stamp_Size
  73         rot_comp.Reg_64  = 0;
  74         if (Pico_mcd->s68k_regs[0x33] & (1<<1))
  75         {
  76                 dprintf("gfx_cd irq 1");
  77                 SekInterruptS68k(1);
  78         }
  79 }
  80
  81
  82 static void gfx_do(void)
  83 {
  84         unsigned int eax, ebx, ecx, edx, esi, edi, pixel;
  85         unsigned int XD, Buffer_Adr, H_Dot;
  86         unsigned int func = rot_comp.Function;
  87         unsigned short *stamp_base;
  88         int DYXS;
  89
  90         XD = rot_comp.Reg_60 & 7;
  91         Buffer_Adr = ((rot_comp.Reg_5E & 0xfff8) + rot_comp.YD) << 2;
  92         stamp_base = (unsigned short *) (Pico_mcd->word_ram2M + rot_comp.Stamp_Map_Adr);
  93         H_Dot = rot_comp.Reg_62 & 0x1ff;
  94         ecx = *(unsigned int *)(Pico_mcd->word_ram2M + rot_comp.Vector_Adr);
  95         edx = ecx >> 16;
  96         ecx = (ecx & 0xffff) << 8;
  97         edx <<= 8;
  98         DYXS = *(int *)(Pico_mcd->word_ram2M + rot_comp.Vector_Adr + 4);
  99         rot_comp.Vector_Adr += 8;
 100
 101         // MAKE_IMAGE_LINE
 102         while (H_Dot)
 103         {
 104                 if (func & 2)           // mode 32x32 dot
 105                 {
 106                         if (func & 4)   // 16x16 screen
 107                         {
 108                                 eax = (ecx >> (11+5)) & 0x007f;
 109                                 ebx = (edx >> (11-2)) & 0x3f80;
 110                         }
 111                         else            // 1x1 screen
 112                         {
 113                                 eax = (ecx >> (11+5)) & 0x07;
 114                                 ebx = (edx >> (11+2)) & 0x38;
 115                         }
 116                 }
 117                 else                    // mode 16x16 dot
 118                 {
 119                         if (func & 4)   // 16x16 screen
 120                         {
 121                                 eax = (ecx >> (11+4)) & 0x00ff;
 122                                 ebx = (edx >> (11-4)) & 0xff00;
 123                         }
 124                         else            // 1x1 screen
 125                         {
 126                                 eax = (ecx >> (11+4)) & 0x0f;
 127                                 ebx = (edx >> (11+0)) & 0xf0;
 128                         }
 129                 }
 130                 ebx += eax;
 131
 132                 // MAKE_IMAGE_PIXEL
 133                 if (!(func & 1))        // NOT TILED
 134                 {
 135                         int mask = (func & 4) ? 0x00800000 : 0x00f80000;
 136                         if ((ecx | edx) & mask)
 137                         {
 138                                 if (func & 0x18) goto Next_Pixel;
 139                                 pixel = 0;
 140                                 goto Pixel_Out;
 141                         }
 142                 }
 143
 144                 // esi = rot_comp.Stamp_Map_Adr;
 145                 edi = stamp_base[ebx] | (stamp_base[ebx+1] << 16);
 146                 esi = edi;
 147                 edi >>= (11+1);
 148                 esi = (esi & 0x7ff) << 7;
 149                 if (!esi) { pixel = 0; goto Pixel_Out; }
 150                 edi &= (0x1c>>1);
 151                 eax = ecx;
 152                 ebx = edx;
 153                 if (func & 2) edi |= 1; // 32 dots?
 154                 switch (edi)
 155                 {
 156                         case 0x00:      // No_Flip_0, 16x16 dots
 157                                 ebx = (ebx >> 9) & 0x3c;
 158                                 ebx += esi;
 159                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 160                                 eax = ((eax >> 8) & 0x40) + ebx;
 161                                 break;
 162                         case 0x01:      // No_Flip_0, 32x32 dots
 163                                 ebx = (ebx >> 9) & 0x7c;
 164                                 ebx += esi;
 165                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 166                                 eax = ((eax >> 7) & 0x180) + ebx;
 167                                 break;
 168                         case 0x02:      // No_Flip_90, 16x16 dots
 169                                 eax = (eax >> 9) & 0x3c;
 170                                 eax += esi;
 171                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap
 172                                 eax += ((ebx >> 8) & 0x40) ^ 0x40;
 173                                 break;
 174                         case 0x03:      // No_Flip_90, 32x32 dots
 175                                 eax = (eax >> 9) & 0x7c;
 176                                 eax += esi;
 177                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap
 178                                 eax += ((ebx >> 7) & 0x180) ^ 0x180;
 179                                 break;
 180                         case 0x04:      // No_Flip_180, 16x16 dots
 181                                 ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
 182                                 ebx += esi;
 183                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap and flip
 184                                 eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
 185                                 break;
 186                         case 0x05:      // No_Flip_180, 32x32 dots
 187                                 ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
 188                                 ebx += esi;
 189                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap and flip
 190                                 eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
 191                                 break;
 192                         case 0x06:      // No_Flip_270, 16x16 dots
 193                                 eax = ((eax >> 9) & 0x3c) ^ 0x3c;
 194                                 eax += esi;
 195                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap
 196                                 eax += (ebx >> 8) & 0x40;
 197                                 break;
 198                         case 0x07:      // No_Flip_270, 32x32 dots
 199                                 eax = ((eax >> 9) & 0x7c) ^ 0x7c;
 200                                 eax += esi;
 201                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap
 202                                 eax += (ebx >> 7) & 0x180;
 203                                 break;
 204                         case 0x08:      // Flip_0, 16x16 dots
 205                                 ebx = (ebx >> 9) & 0x3c;
 206                                 ebx += esi;
 207                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap, flip
 208                                 eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
 209                                 break;
 210                         case 0x09:      // Flip_0, 32x32 dots
 211                                 ebx = (ebx >> 9) & 0x7c;
 212                                 ebx += esi;
 213                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap, flip
 214                                 eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
 215                                 break;
 216                         case 0x0a:      // Flip_90, 16x16 dots
 217                                 eax = ((eax >> 9) & 0x3c) ^ 0x3c;
 218                                 eax += esi;
 219                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap, flip
 220                                 eax += ((ebx >> 8) & 0x40) ^ 0x40;
 221                                 break;
 222                         case 0x0b:      // Flip_90, 32x32 dots
 223                                 eax = ((eax >> 9) & 0x7c) ^ 0x7c;
 224                                 eax += esi;
 225                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap, flip
 226                                 eax += ((ebx >> 7) & 0x180) ^ 0x180;
 227                                 break;
 228                         case 0x0c:      // Flip_180, 16x16 dots
 229                                 ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
 230                                 ebx += esi;
 231                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 232                                 eax = ((eax >> 8) & 0x40) + ebx;
 233                                 break;
 234                         case 0x0d:      // Flip_180, 32x32 dots
 235                                 ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
 236                                 ebx += esi;
 237                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 238                                 eax = ((eax >> 7) & 0x180) + ebx;
 239                                 break;
 240                         case 0x0e:      // Flip_270, 16x16 dots
 241                                 eax = (eax >> 9) & 0x3c;
 242                                 eax += esi;
 243                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap, flip
 244                                 eax += (ebx >> 8) & 0x40;
 245                                 break;
 246                         case 0x0f:      // Flip_270, 32x32 dots
 247                                 eax = (eax >> 9) & 0x7c;
 248                                 eax += esi;
 249                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap, flip
 250                                 eax += (ebx >> 7) & 0x180;
 251                                 break;
 252                 }
 253
 254                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 255                 if (!(edi & 0x800)) pixel >>= 4;
 256                 else pixel &= 0x0f;
 257
 258 Pixel_Out:
 259                 if (!pixel && (func & 0x18)) goto Next_Pixel;
 260                 esi = Buffer_Adr + ((XD>>1)^1);                         // pixel addr
 261                 eax = *(Pico_mcd->word_ram2M + esi);                    // old pixel
 262                 if (XD & 1)
 263                 {
 264                         if ((eax & 0x0f) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
 265                         *(Pico_mcd->word_ram2M + esi) = pixel | (eax & 0xf0);
 266                 }
 267                 else
 268                 {
 269                         if ((eax & 0xf0) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
 270                         *(Pico_mcd->word_ram2M + esi) = (pixel << 4) | (eax & 0xf);
 271                 }
 272
 273
 274 Next_Pixel:
 275                 ecx += (DYXS << 16) >> 16;      // rot_comp.DXS;
 276                 edx +=  DYXS >> 16;             // rot_comp.DYS;
 277                 XD++;
 278                 if (XD >= 8)
 279                 {
 280                         Buffer_Adr += ((rot_comp.Reg_5C & 0x1f) + 1) << 5;
 281                         XD = 0;
 282                 }
 283                 H_Dot--;
 284         }
 285         // end while
 286
 287
 288 //nothing_to_draw:
 289         rot_comp.YD++;
 290         // rot_comp.V_Dot--; // will be done by caller
 291 }
 292
 293
 294 void gfx_cd_update(void)
 295 {
 296         unsigned char *V_Dot = (unsigned char *) &rot_comp.Reg_64;
 297         int jobs;
 298
 299         dprintf("gfx_cd_update, Reg_64 = %04x", rot_comp.Reg_64);
 300
 301         if (!*V_Dot)
 302         {
 303                 gfx_completed();
 304                 return;
 305         }
 306
 307         jobs = rot_comp.Float_Part >> 16;
 308
 309         if (!jobs)
 310         {
 311                 rot_comp.Float_Part += rot_comp.Draw_Speed;
 312                 return;
 313         }
 314
 315         rot_comp.Float_Part &= 0xffff;
 316         rot_comp.Float_Part += rot_comp.Draw_Speed;
 317
 318         while (jobs--)
 319         {
 320                 if (PicoOpt & 0x1000)
 321                         gfx_do();       // jmp [Jmp_Adr]:
 322
 323                 (*V_Dot)--;             // dec byte [V_Dot]
 324
 325                 if (!*V_Dot)
 326                 {
 327                         // GFX_Completed:
 328                         gfx_completed();
 329                         return;
 330                 }
 331         }
 332 }
 333
 334
 335 unsigned int gfx_cd_read(unsigned int a)
 336 {
 337         unsigned int d = 0;
 338
 339         switch (a) {
 340                 case 0x58: d = rot_comp.Reg_58; break;
 341                 case 0x5A: d = rot_comp.Reg_5A; break;
 342                 case 0x5C: d = rot_comp.Reg_5C; break;
 343                 case 0x5E: d = rot_comp.Reg_5E; break;
 344                 case 0x60: d = rot_comp.Reg_60; break;
 345                 case 0x62: d = rot_comp.Reg_62; break;
 346                 case 0x64: d = rot_comp.Reg_64; break;
 347                 case 0x66: break;
 348                 default: dprintf("gfx_cd_read FIXME: unexpected address: %02x", a); break;
 349         }
 350
 351         dprintf("gfx_cd_read(%02x) = %04x", a, d);
 352
 353         return 0;
 354 }
 355
 356 void gfx_cd_write16(unsigned int a, unsigned int d)
 357 {
 358         dprintf("gfx_cd_write16(%x, %04x)", a, d);
 359
 360         switch (a) {
 361                 case 0x58: // .Reg_Stamp_Size
 362                         rot_comp.Reg_58 = d & 7;
 363                         return;
 364
 365                 case 0x5A: // .Reg_Stamp_Adr
 366                         rot_comp.Reg_5A = d & 0xffe0;
 367                         return;
 368
 369                 case 0x5C: // .Reg_IM_VCell_Size
 370                         rot_comp.Reg_5C = d & 0x1f;
 371                         return;
 372
 373                 case 0x5E: // .Reg_IM_Adr
 374                         rot_comp.Reg_5E = d & 0xFFF8;
 375                         return;
 376
 377                 case 0x60: // .Reg_IM_Offset
 378                         rot_comp.Reg_60 = d & 0x3f;
 379                         return;
 380
 381                 case 0x62: // .Reg_IM_HDot_Size
 382                         rot_comp.Reg_62 = d & 0x1ff;
 383                         return;
 384
 385                 case 0x64: // .Reg_IM_VDot_Size
 386                         rot_comp.Reg_64 = d & 0xff;     // V_Dot, must be 32bit?
 387                         return;
 388
 389                 case 0x66: // .Reg_Vector_Adr
 390                         rot_comp.Reg_66 = d & 0xfffe;
 391                         if (Pico_mcd->s68k_regs[3]&4) return; // can't do tanformations in 1M mode
 392                         gfx_cd_start();
 393                         return;
 394
 395                 default: dprintf("gfx_cd_write16 FIXME: unexpected address: %02x", a); return;
 396         }
 397 }
 398
 399
 400 void gfx_cd_reset(void)
 401 {
 402         memset(&rot_comp.Reg_58, 0, sizeof(rot_comp));
 403 }
 404
 405
 406 // --------------------------------
 407
 408 #include "cell_map.c"
 409
 410 typedef unsigned short u16;
 411
 412 // check: Heart of the alien, jaguar xj 220
 413 void DmaSlowCell(unsigned int source, unsigned int a, int len, unsigned char inc)
 414 {
 415   unsigned char *base;
 416   unsigned int asrc, a2;
 417   u16 *r;
 418
 419   base = Pico_mcd->word_ram1M[Pico_mcd->s68k_regs[3]&1];
 420
 421   switch (Pico.video.type)
 422   {
 423     case 1: // vram
 424       r = Pico.vram;
 425       for(; len; len--)
 426       {
 427         asrc = cell_map(source >> 2) << 2;
 428         asrc |= source & 2;
 429         // if(a&1) d=(d<<8)|(d>>8); // ??
 430         r[a>>1] = *(u16 *)(base + asrc);
 431         source += 2;
 432         // AutoIncrement
 433         a=(u16)(a+inc);
 434       }
 435       rendstatus|=0x10;
 436       break;
 437
 438     case 3: // cram
 439       Pico.m.dirtyPal = 1;
 440       r = Pico.cram;
 441       for(a2=a&0x7f; len; len--)
 442       {
 443         asrc = cell_map(source >> 2) << 2;
 444         asrc |= source & 2;
 445         r[a2>>1] = *(u16 *)(base + asrc);
 446         source += 2;
 447         // AutoIncrement
 448         a2+=inc;
 449         // good dest?
 450         if(a2 >= 0x80) break;
 451       }
 452       a=(a&0xff00)|a2;
 453       break;
 454
 455     case 5: // vsram[a&0x003f]=d;
 456       r = Pico.vsram;
 457       for(a2=a&0x7f; len; len--)
 458       {
 459         asrc = cell_map(source >> 2) << 2;
 460         asrc |= source & 2;
 461         r[a2>>1] = *(u16 *)(base + asrc);
 462         source += 2;
 463         // AutoIncrement
 464         a2+=inc;
 465         // good dest?
 466         if(a2 >= 0x80) break;
 467       }
 468       a=(a&0xff00)|a2;
 469       break;
 470   }
 471   // remember addr
 472   Pico.video.addr=(u16)a;
 473 }
 474