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;
  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;
  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 = 0;
  85         unsigned int func = rot_comp.Function;
  86         unsigned short *ptrs;
  87
  88         rot_comp.XD = rot_comp.Reg_60 & 7;
  89         rot_comp.Buffer_Adr = ((rot_comp.Reg_5E & 0xfff8) + rot_comp.YD) << 2;
  90         rot_comp.H_Dot = rot_comp.Reg_62 & 0x1ff;
  91         ecx = *(unsigned int *)(Pico_mcd->word_ram2M + rot_comp.Vector_Adr);
  92         edx = ecx >> 16;
  93         ecx = (ecx & 0xffff) << 8;
  94         edx <<= 8;
  95         rot_comp.DXS = *(int *)(Pico_mcd->word_ram2M + rot_comp.Vector_Adr + 4);
  96         rot_comp.DYS =  rot_comp.DXS >> 16;
  97         rot_comp.DXS = (rot_comp.DXS << 16) >> 16; // sign extend
  98         rot_comp.Vector_Adr += 8;
  99
 100         // MAKE_IMAGE_LINE
 101         while (rot_comp.H_Dot)
 102         {
 103                 if (func & 2)           // mode 32x32 dot
 104                 {
 105                         if (func & 4)   // 16x16 screen
 106                         {
 107                                 eax = (ecx >> (11+5)) & 0x007f;
 108                                 ebx = (edx >> (11-2)) & 0x3f80;
 109                         }
 110                         else            // 1x1 screen
 111                         {
 112                                 eax = (ecx >> (11+5)) & 0x07;
 113                                 ebx = (edx >> (11+2)) & 0x38;
 114                         }
 115                 }
 116                 else                    // mode 16x16 dot
 117                 {
 118                         if (func & 4)   // 16x16 screen
 119                         {
 120                                 eax = (ecx >> (11+4)) & 0x00ff;
 121                                 ebx = (edx >> (11-4)) & 0xff00;
 122                         }
 123                         else            // 1x1 screen
 124                         {
 125                                 eax = (ecx >> (11+4)) & 0x0f;
 126                                 ebx = (edx >> (11+0)) & 0xf0;
 127                         }
 128                 }
 129                 ebx += eax;
 130
 131                 // esi = rot_comp.Stamp_Map_Adr;
 132                 ptrs = (unsigned short *) (Pico_mcd->word_ram2M + rot_comp.Stamp_Map_Adr + ebx*2);
 133                 edi = ptrs[0] | (ptrs[1] << 16);
 134
 135                 // MAKE_IMAGE_PIXEL
 136                 if (!(func & 1))        // NOT TILED
 137                 {
 138                         if (func & 4)   // 16x16 screen
 139                         {
 140                                 if ((edx & 0x00800000) || (ecx & 0x00800000)) goto Pixel_Out;
 141                         }
 142                         else            // 1x1 screen
 143                         {
 144                                 if ((edx & 0x00f80000) || (ecx & 0x00f80000)) goto Pixel_Out;
 145                         }
 146                 }
 147                 esi = edi;
 148                 edi >>= (11+1);
 149                 esi = (esi & 0x7ff) << 7;
 150                 if (!esi) goto Pixel_Out;
 151                 edi &= (0x1c>>1);
 152                 eax = ecx;
 153                 ebx = edx;
 154                 if (func & 2) edi |= 1; // 32 dots?
 155                 switch (edi)
 156                 {
 157                         case 0x00:      // No_Flip_0, 16x16 dots
 158                                 ebx = (ebx >> 9) & 0x3c;
 159                                 ebx += esi;
 160                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 161                                 eax = ((eax >> 8) & 0x40) + ebx;
 162                                 break;
 163                         case 0x01:      // No_Flip_0, 32x32 dots
 164                                 ebx = (ebx >> 9) & 0x7c;
 165                                 ebx += esi;
 166                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 167                                 eax = ((eax >> 7) & 0x180) + ebx;
 168                                 break;
 169                         case 0x02:      // No_Flip_90, 16x16 dots
 170                                 eax = (eax >> 9) & 0x3c;
 171                                 eax += esi;
 172                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap
 173                                 eax += ((ebx >> 8) & 0x40) ^ 0x40;
 174                                 break;
 175                         case 0x03:      // No_Flip_90, 32x32 dots
 176                                 eax = (eax >> 9) & 0x7c;
 177                                 eax += esi;
 178                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap
 179                                 eax += ((ebx >> 7) & 0x180) ^ 0x180;
 180                                 break;
 181                         case 0x04:      // No_Flip_180, 16x16 dots
 182                                 ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
 183                                 ebx += esi;
 184                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap and flip
 185                                 eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
 186                                 break;
 187                         case 0x05:      // No_Flip_180, 32x32 dots
 188                                 ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
 189                                 ebx += esi;
 190                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap and flip
 191                                 eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
 192                                 break;
 193                         case 0x06:      // No_Flip_270, 16x16 dots
 194                                 eax = ((eax >> 9) & 0x3c) ^ 0x3c;
 195                                 eax += esi;
 196                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap
 197                                 eax += (ebx >> 8) & 0x40;
 198                                 break;
 199                         case 0x07:      // No_Flip_270, 32x32 dots
 200                                 eax = ((eax >> 9) & 0x7c) ^ 0x7c;
 201                                 eax += esi;
 202                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap
 203                                 eax += (ebx >> 7) & 0x180;
 204                                 break;
 205                         case 0x08:      // Flip_0, 16x16 dots
 206                                 ebx = (ebx >> 9) & 0x3c;
 207                                 ebx += esi;
 208                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap, flip
 209                                 eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
 210                                 break;
 211                         case 0x09:      // Flip_0, 32x32 dots
 212                                 ebx = (ebx >> 9) & 0x7c;
 213                                 ebx += esi;
 214                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap, flip
 215                                 eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
 216                                 break;
 217                         case 0x0a:      // Flip_90, 16x16 dots
 218                                 eax = ((eax >> 9) & 0x3c) ^ 0x3c;
 219                                 eax += esi;
 220                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap, flip
 221                                 eax += ((ebx >> 8) & 0x40) ^ 0x40;
 222                                 break;
 223                         case 0x0b:      // Flip_90, 32x32 dots
 224                                 eax = ((eax >> 9) & 0x7c) ^ 0x7c;
 225                                 eax += esi;
 226                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap, flip
 227                                 eax += ((ebx >> 7) & 0x180) ^ 0x180;
 228                                 break;
 229                         case 0x0c:      // Flip_180, 16x16 dots
 230                                 ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
 231                                 ebx += esi;
 232                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 233                                 eax = ((eax >> 8) & 0x40) + ebx;
 234                                 break;
 235                         case 0x0d:      // Flip_180, 32x32 dots
 236                                 ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
 237                                 ebx += esi;
 238                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 239                                 eax = ((eax >> 7) & 0x180) + ebx;
 240                                 break;
 241                         case 0x0e:      // Flip_270, 16x16 dots
 242                                 eax = (eax >> 9) & 0x3c;
 243                                 eax += esi;
 244                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap, flip
 245                                 eax += (ebx >> 8) & 0x40;
 246                                 break;
 247                         case 0x0f:      // Flip_270, 32x32 dots
 248                                 eax = (eax >> 9) & 0x7c;
 249                                 eax += esi;
 250                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap, flip
 251                                 eax += (ebx >> 7) & 0x180;
 252                                 break;
 253                 }
 254
 255                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 256                 if (!(edi & 0x800)) pixel >>= 4;
 257
 258 Pixel_Out:
 259 //              pixel = 0;
 260 //Finish:
 261                 pixel &= 0x0f;
 262                 if (!pixel && (func & 0x18)) goto Next_Pixel;
 263                 esi = rot_comp.Buffer_Adr + ((rot_comp.XD>>1)^1);       // pixel addr
 264                 eax = *(Pico_mcd->word_ram2M + esi);                    // old pixel
 265                 if (rot_comp.XD & 1)
 266                 {
 267                         if ((eax & 0x0f) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
 268                         *(Pico_mcd->word_ram2M + esi) = pixel | (eax & 0xf0);
 269                 }
 270                 else
 271                 {
 272                         if ((eax & 0xf0) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
 273                         *(Pico_mcd->word_ram2M + esi) = (pixel << 4) | (eax & 0xf);
 274                 }
 275
 276
 277 Next_Pixel:
 278                 ecx += rot_comp.DXS;
 279                 edx += rot_comp.DYS;
 280                 rot_comp.XD++;
 281                 if (rot_comp.XD >= 8)
 282                 {
 283                         rot_comp.Buffer_Adr += ((rot_comp.Reg_5C & 0x1f) + 1) << 5;
 284                         rot_comp.XD = 0;
 285                 }
 286                 rot_comp.H_Dot--;
 287         }
 288
 289
 290 //nothing_to_draw:
 291         rot_comp.YD++;
 292         // rot_comp.V_Dot--; // will be done by caller
 293 }
 294
 295
 296 void gfx_cd_update(void)
 297 {
 298         unsigned char *V_Dot = (unsigned char *) &rot_comp.Reg_64;
 299         int jobs;
 300
 301         dprintf("gfx_cd_update, Reg_64 = %04x", rot_comp.Reg_64);
 302
 303         if (!*V_Dot)
 304         {
 305                 gfx_completed();
 306                 return;
 307         }
 308
 309         jobs = rot_comp.Float_Part >> 16;
 310
 311         if (!jobs)
 312         {
 313                 rot_comp.Float_Part += rot_comp.Draw_Speed;
 314                 return;
 315         }
 316
 317         rot_comp.Float_Part &= 0xffff;
 318         rot_comp.Float_Part += rot_comp.Draw_Speed;
 319
 320         while (jobs--)
 321         {
 322                 if (PicoOpt & 0x1000)
 323                         gfx_do();       // jmp [Jmp_Adr]:
 324
 325                 (*V_Dot)--;             // dec byte [V_Dot]
 326
 327                 if (!*V_Dot)
 328                 {
 329                         // GFX_Completed:
 330                         gfx_completed();
 331                         return;
 332                 }
 333         }
 334 }
 335
 336
 337 unsigned int gfx_cd_read(unsigned int a)
 338 {
 339         unsigned int d = 0;
 340
 341         switch (a) {
 342                 case 0x58: d = rot_comp.Reg_58; break;
 343                 case 0x5A: d = rot_comp.Reg_5A; break;
 344                 case 0x5C: d = rot_comp.Reg_5C; break;
 345                 case 0x5E: d = rot_comp.Reg_5E; break;
 346                 case 0x60: d = rot_comp.Reg_60; break;
 347                 case 0x62: d = rot_comp.Reg_62; break;
 348                 case 0x64: d = rot_comp.Reg_64; break;
 349                 case 0x66: break;
 350                 default: dprintf("gfx_cd_read FIXME: unexpected address: %02x", a); break;
 351         }
 352
 353         dprintf("gfx_cd_read(%02x) = %04x", a, d);
 354
 355         return 0;
 356 }
 357
 358 void gfx_cd_write16(unsigned int a, unsigned int d)
 359 {
 360         dprintf("gfx_cd_write16(%x, %04x)", a, d);
 361
 362         switch (a) {
 363                 case 0x58: // .Reg_Stamp_Size
 364                         rot_comp.Reg_58 = d & 7;
 365                         return;
 366
 367                 case 0x5A: // .Reg_Stamp_Adr
 368                         rot_comp.Reg_5A = d & 0xffe0;
 369                         return;
 370
 371                 case 0x5C: // .Reg_IM_VCell_Size
 372                         rot_comp.Reg_5C = d & 0x1f;
 373                         return;
 374
 375                 case 0x5E: // .Reg_IM_Adr
 376                         rot_comp.Reg_5E = d & 0xFFF8;
 377                         return;
 378
 379                 case 0x60: // .Reg_IM_Offset
 380                         rot_comp.Reg_60 = d & 0x3f;
 381                         return;
 382
 383                 case 0x62: // .Reg_IM_HDot_Size
 384                         rot_comp.Reg_62 = d & 0x1ff;
 385                         return;
 386
 387                 case 0x64: // .Reg_IM_VDot_Size
 388                         rot_comp.Reg_64 = d & 0xff;     // V_Dot, must be 32bit?
 389                         return;
 390
 391                 case 0x66: // .Reg_Vector_Adr
 392                         rot_comp.Reg_66 = d & 0xfffe;
 393                         if (Pico_mcd->s68k_regs[3]&4) return; // can't do tanformations in 1M mode
 394                         gfx_cd_start();
 395                         return;
 396
 397                 default: dprintf("gfx_cd_write16 FIXME: unexpected address: %02x", a); return;
 398         }
 399 }
 400
 401
 402 void gfx_cd_reset(void)
 403 {
 404         memset(&rot_comp.Reg_58, 0, sizeof(rot_comp));
 405 }
 406
 407
 408 // --------------------------------
 409
 410 #include "cell_map.c"
 411
 412 typedef unsigned short u16;
 413
 414 // check: Heart of the alien, jaguar xj 220
 415 void DmaSlowCell(unsigned int source, unsigned int a, int len, unsigned char inc)
 416 {
 417   unsigned char *base;
 418   unsigned int asrc, a2;
 419   u16 *r;
 420
 421   base = Pico_mcd->word_ram1M[Pico_mcd->s68k_regs[3]&1];
 422
 423   switch (Pico.video.type)
 424   {
 425     case 1: // vram
 426       r = Pico.vram;
 427       for(; len; len--)
 428       {
 429         asrc = cell_map(source >> 2) << 2;
 430         asrc |= source & 2;
 431         // if(a&1) d=(d<<8)|(d>>8); // ??
 432         r[a>>1] = *(u16 *)(base + asrc);
 433         source += 2;
 434         // AutoIncrement
 435         a=(u16)(a+inc);
 436       }
 437       rendstatus|=0x10;
 438       break;
 439
 440     case 3: // cram
 441       Pico.m.dirtyPal = 1;
 442       r = Pico.cram;
 443       for(a2=a&0x7f; len; len--)
 444       {
 445         asrc = cell_map(source >> 2) << 2;
 446         asrc |= source & 2;
 447         r[a2>>1] = *(u16 *)(base + asrc);
 448         source += 2;
 449         // AutoIncrement
 450         a2+=inc;
 451         // good dest?
 452         if(a2 >= 0x80) break;
 453       }
 454       a=(a&0xff00)|a2;
 455       break;
 456
 457     case 5: // vsram[a&0x003f]=d;
 458       r = Pico.vsram;
 459       for(a2=a&0x7f; len; len--)
 460       {
 461         asrc = cell_map(source >> 2) << 2;
 462         asrc |= source & 2;
 463         r[a2>>1] = *(u16 *)(base + asrc);
 464         source += 2;
 465         // AutoIncrement
 466         a2+=inc;
 467         // good dest?
 468         if(a2 >= 0x80) break;
 469       }
 470       a=(a&0xff00)|a2;
 471       break;
 472   }
 473   // remember addr
 474   Pico.video.addr=(u16)a;
 475 }
 476