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 #if 1*0
  33 typedef struct
  34 {
  35         unsigned int Reg_58;    // Stamp_Size
  36         unsigned int Reg_5A;
  37         unsigned int Reg_5C;
  38         unsigned int Reg_5E;
  39         unsigned int Reg_60;
  40         unsigned int Reg_62;
  41         unsigned int Reg_64;    // V_Dot
  42         unsigned int Reg_66;
  43
  44         unsigned int Stamp_Map_Adr;
  45         unsigned int Buffer_Adr;
  46         unsigned int Vector_Adr;
  47         unsigned int Function;  // Jmp_Adr;
  48         unsigned int Float_Part;
  49         unsigned int Draw_Speed;
  50
  51         unsigned int XS;
  52         unsigned int YS;
  53         /*unsigned*/ int DXS;
  54         /*unsigned*/ int DYS;
  55         unsigned int XD;
  56         unsigned int YD;
  57         unsigned int XD_Mul;
  58         unsigned int H_Dot;
  59 } Rot_Comp;
  60 #endif
  61
  62 static void gfx_cd_start(void)
  63 {
  64         int upd_len;
  65
  66         dprintf("gfx_cd_start()");
  67
  68         rot_comp.XD_Mul = ((rot_comp.Reg_5C & 0x1f) + 1) * 4;
  69         rot_comp.Function = (rot_comp.Reg_58 & 7) | (Pico_mcd->s68k_regs[3] & 0x18);    // Jmp_Adr
  70         rot_comp.Buffer_Adr = (rot_comp.Reg_5E & 0xfff8) << 2;
  71         rot_comp.YD = (rot_comp.Reg_60 >> 3) & 7;
  72         rot_comp.Vector_Adr = (rot_comp.Reg_66 & 0xfffe) << 2;
  73
  74         upd_len = (rot_comp.Reg_62 >> 3) & 0x3f;
  75         upd_len = Table_Rot_Time[upd_len];
  76         rot_comp.Draw_Speed = rot_comp.Float_Part = upd_len;
  77
  78         rot_comp.Reg_58 |= 0x8000;      // Stamp_Size,  we start a new GFX operation
  79
  80         switch (rot_comp.Reg_58 & 6)    // Scr_16?
  81         {
  82                 case 0: // ?
  83                         rot_comp.Stamp_Map_Adr = (rot_comp.Reg_5A & 0xff80) << 2;
  84                         break;
  85                 case 2: // .Dot_32
  86                         rot_comp.Stamp_Map_Adr = (rot_comp.Reg_5A & 0xffe0) << 2;
  87                         break;
  88                 case 4: // .Scr_16
  89                         rot_comp.Stamp_Map_Adr = 0x20000;
  90                         break;
  91                 case 6: // .Scr_16_Dot_32
  92                         rot_comp.Stamp_Map_Adr = (rot_comp.Reg_5A & 0xe000) << 2;
  93                         break;
  94         }
  95
  96         gfx_cd_update();
  97 }
  98
  99
 100 static void gfx_completed(void)
 101 {
 102         rot_comp.Reg_58 &= 0x7fff;      // Stamp_Size
 103         rot_comp.Reg_64  = 0;
 104         if (Pico_mcd->s68k_regs[0x33] & (1<<1))
 105         {
 106                 dprintf("gfx_cd irq 1");
 107                 SekInterruptS68k(1);
 108         }
 109 }
 110
 111
 112 static void gfx_do(void)
 113 {
 114         unsigned int eax, ebx, ecx, edx, esi, edi, pixel = 0;
 115         unsigned int func = rot_comp.Function;
 116         unsigned short *ptrs;
 117
 118         rot_comp.XD = rot_comp.Reg_60 & 7;
 119         rot_comp.Buffer_Adr = ((rot_comp.Reg_5E & 0xfff8) + rot_comp.YD) << 2;
 120         rot_comp.H_Dot = rot_comp.Reg_62 & 0x1ff;
 121         ecx = *(unsigned int *)(Pico_mcd->word_ram2M + rot_comp.Vector_Adr);
 122         edx = ecx >> 16;
 123         ecx = (ecx & 0xffff) << 8;
 124         edx <<= 8;
 125         rot_comp.DXS = *(int *)(Pico_mcd->word_ram2M + rot_comp.Vector_Adr + 4);
 126         rot_comp.DYS =  rot_comp.DXS >> 16;
 127         rot_comp.DXS = (rot_comp.DXS << 16) >> 16; // sign extend
 128         rot_comp.Vector_Adr += 8;
 129         //if ((rot_comp.H_Dot & 0x1ff) == 0)
 130         //      goto nothing_to_draw;
 131
 132         // MAKE_IMAGE_LINE
 133         while (rot_comp.H_Dot)
 134         {
 135                 if (func & 2)           // mode 32x32 dot
 136                 {
 137                         if (func & 4)   // 16x16 screen
 138                         {
 139                                 eax = (ecx >> (11+5)) & 0x7f;
 140                                 ebx = (edx >> (11-2)) & 0x3f80;
 141                         }
 142                         else            // 1x1 screen
 143                         {
 144                                 eax = (ecx >> (11+5)) & 0x0f;
 145                                 ebx = (edx >> (11+2)) & 0x38;
 146                         }
 147                 }
 148                 else                    // mode 16x16 dot
 149                 {
 150                         if (func & 4)   // 16x16 screen
 151                         {
 152                                 eax = (ecx >> (11+4)) & 0xff;
 153                                 ebx = (edx >> (11-4)) & 0xff00;
 154                         }
 155                         else            // 1x1 screen
 156                         {
 157                                 eax = (ecx >> (11+4)) & 0x0f;
 158                                 ebx = (edx >> (11+0)) & 0xf0;
 159                         }
 160                 }
 161                 ebx += eax;
 162
 163                 esi = rot_comp.Stamp_Map_Adr;
 164                 ptrs = (unsigned short *) (Pico_mcd->word_ram2M + rot_comp.Stamp_Map_Adr + ebx*2);
 165                 edi = ptrs[0] | (ptrs[1] << 16);
 166
 167                 // MAKE_IMAGE_PIXEL
 168                 if (!(func & 1))        // NOT TILED
 169                 {
 170                         if (func & 4)   // 16x16 screen
 171                         {
 172                                 if ((edx & 0x00800000) || (ecx & 0x00800000)) goto Pixel_Out;
 173                         }
 174                         else            // 1x1 screen
 175                         {
 176                                 if ((edx & 0x00f80000) || (ecx & 0x00f80000)) goto Pixel_Out;
 177                         }
 178                 }
 179                 esi = edi;
 180                 edi >>= (11+1);
 181                 esi = (esi & 0x7ff) << 7;
 182                 if (!esi) goto Pixel_Out;
 183                 edi &= (0x1c>>1);
 184                 eax = ecx;
 185                 ebx = edx;
 186                 if (func & 2) edi |= 1; // 32 dots?
 187                 switch (edi)
 188                 {
 189                         case 0x00:      // No_Flip_0, 16x16 dots
 190                                 ebx = (ebx >> 9) & 0x3c;
 191                                 ebx += esi;
 192                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 193                                 eax = ((eax >> 8) & 0x40) + ebx;
 194                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 195                                 if (!(edi & 0x800)) pixel >>= 4;
 196                                 break;
 197                         case 0x01:      // No_Flip_0, 32x32 dots
 198                                 ebx = (ebx >> 9) & 0x7c;
 199                                 ebx += esi;
 200                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 201                                 eax = ((eax >> 7) & 0x180) + ebx;
 202                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 203                                 if (!(edi & 0x800)) pixel >>= 4;
 204                                 break;
 205                         case 0x02:      // No_Flip_90, 16x16 dots
 206                                 eax = (eax >> 9) & 0x3c;
 207                                 eax += esi;
 208                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap
 209                                 eax += ((ebx >> 8) & 0x40) ^ 0x40;
 210                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 211                                 if (!(edi & 0x800)) pixel >>= 4;
 212                                 break;
 213                         case 0x03:      // No_Flip_90, 32x32 dots
 214                                 eax = (eax >> 9) & 0x7c;
 215                                 eax += esi;
 216                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap
 217                                 eax += (ebx >> 7) & 0x180;
 218                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 219                                 if (!(edi & 0x800)) pixel >>= 4;
 220                                 break;
 221                         case 0x04:      // No_Flip_180, 16x16 dots
 222                                 ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
 223                                 ebx += esi;
 224                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap and flip
 225                                 eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
 226                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 227                                 if (!(edi & 0x800)) pixel >>= 4;
 228                                 break;
 229                         case 0x05:      // No_Flip_180, 32x32 dots
 230                                 ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
 231                                 ebx += esi;
 232                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap and flip
 233                                 eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
 234                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 235                                 if (!(edi & 0x800)) pixel >>= 4;
 236                                 break;
 237                         case 0x06:      // No_Flip_270, 16x16 dots
 238                                 eax = ((eax >> 9) & 0x3c) ^ 0x3c;
 239                                 eax += esi;
 240                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap
 241                                 eax += (ebx >> 8) & 0x40;
 242                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 243                                 if (!(edi & 0x800)) pixel >>= 4;
 244                                 break;
 245                         case 0x07:      // No_Flip_270, 32x32 dots
 246                                 eax = ((eax >> 9) & 0x7c) ^ 0x7c;
 247                                 eax += esi;
 248                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap
 249                                 eax += (ebx >> 7) & 0x180;
 250                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 251                                 if (!(edi & 0x800)) pixel >>= 4;
 252                                 break;
 253                         case 0x08:      // Flip_0, 16x16 dots
 254                                 ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
 255                                 ebx += esi;
 256                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap, flip
 257                                 eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
 258                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 259                                 if (!(edi & 0x800)) pixel >>= 4;
 260                                 break;
 261                         case 0x09:      // Flip_0, 32x32 dots
 262                                 ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
 263                                 ebx += esi;
 264                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap, flip
 265                                 eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
 266                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 267                                 if (!(edi & 0x800)) pixel >>= 4;
 268                                 break;
 269                         case 0x0a:      // Flip_90, 16x16 dots
 270                                 eax = ((eax >> 9) & 0x3c) ^ 0x3c;
 271                                 eax += esi;
 272                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap, flip
 273                                 eax += ((ebx >> 8) & 0x40) ^ 0x40;
 274                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 275                                 if (!(edi & 0x800)) pixel >>= 4;
 276                                 break;
 277                         case 0x0b:      // Flip_90, 32x32 dots
 278                                 eax = ((eax >> 9) & 0x7c) ^ 0x7c;
 279                                 eax += esi;
 280                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap, flip
 281                                 eax += ((ebx >> 7) & 0x180) ^ 0x180;
 282                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 283                                 if (!(edi & 0x800)) pixel >>= 4;
 284                                 break;
 285                         case 0x0c:      // Flip_180, 16x16 dots
 286                                 ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
 287                                 ebx += esi;
 288                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 289                                 eax = ((eax >> 8) & 0x40) + ebx;
 290                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 291                                 if (!(edi & 0x800)) pixel >>= 4;
 292                                 break;
 293                         case 0x0d:      // Flip_180, 32x32 dots
 294                                 ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
 295                                 ebx += esi;
 296                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 297                                 eax = ((eax >> 7) & 0x180) + ebx;
 298                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 299                                 if (!(edi & 0x800)) pixel >>= 4;
 300                                 break;
 301                         case 0x0e:      // Flip_270, 16x16 dots
 302                                 eax = (eax >> 9) & 0x3c;
 303                                 eax += esi;
 304                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap, flip
 305                                 eax += (ebx >> 8) & 0x40;
 306                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 307                                 if (!(edi & 0x800)) pixel >>= 4;
 308                                 break;
 309                         case 0x0f:      // Flip_270, 32x32 dots
 310                                 eax = (eax >> 9) & 0x7c;
 311                                 eax += esi;
 312                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap, flip
 313                                 eax += (ebx >> 7) & 0x180;
 314                                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 315                                 if (!(edi & 0x800)) pixel >>= 4;
 316                                 break;
 317                 }
 318
 319 Pixel_Out:
 320 //              pixel = 0;
 321 //Finish:
 322                 pixel &= 0x0f;
 323                 if (!pixel && (func & 0x18)) goto Next_Pixel;
 324                 esi = rot_comp.Buffer_Adr + ((rot_comp.XD>>1)^1);       // pixel addr
 325                 eax = *(Pico_mcd->word_ram2M + esi);                    // old pixel
 326                 if (rot_comp.XD & 1)
 327                 {
 328                         if ((eax & 0x0f) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
 329                         *(Pico_mcd->word_ram2M + esi) = pixel | (eax & 0xf0);
 330                 }
 331                 else
 332                 {
 333                         if ((eax & 0xf0) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
 334                         *(Pico_mcd->word_ram2M + esi) = (pixel << 4) | (eax & 0xf);
 335                 }
 336
 337
 338 Next_Pixel:
 339                 ecx += rot_comp.DXS;
 340                 edx += rot_comp.DYS;
 341                 rot_comp.XD++;
 342                 if (rot_comp.XD >= 8)
 343                 {
 344                         rot_comp.Buffer_Adr += ((rot_comp.Reg_5C & 0x1f) + 1) << 5;
 345                         rot_comp.XD = 0;
 346                 }
 347                 rot_comp.H_Dot--;
 348         }
 349
 350
 351 //nothing_to_draw:
 352         rot_comp.YD++;
 353         // rot_comp.V_Dot--; // will be done by caller
 354 }
 355
 356
 357 void gfx_cd_update(void)
 358 {
 359         unsigned char *V_Dot = (unsigned char *) &rot_comp.Reg_64;
 360         int jobs;
 361
 362         dprintf("gfx_cd_update, Reg_64 = %04x", rot_comp.Reg_64);
 363
 364         if (!*V_Dot)
 365         {
 366                 gfx_completed();
 367                 return;
 368         }
 369
 370         jobs = rot_comp.Float_Part >> 16;
 371
 372         if (!jobs)
 373         {
 374                 rot_comp.Float_Part += rot_comp.Draw_Speed;
 375                 return;
 376         }
 377
 378         rot_comp.Float_Part &= 0xffff;
 379         rot_comp.Float_Part += rot_comp.Draw_Speed;
 380
 381         while (jobs--)
 382         {
 383                 if (PicoOpt & 0x1000)
 384                         gfx_do();       // jmp [Jmp_Adr]:
 385
 386                 (*V_Dot)--;             // dec byte [V_Dot]
 387
 388                 if (!*V_Dot)
 389                 {
 390                         // GFX_Completed:
 391                         gfx_completed();
 392                         return;
 393                 }
 394         }
 395 }
 396
 397
 398 unsigned int gfx_cd_read(unsigned int a)
 399 {
 400         unsigned int d = 0;
 401
 402         switch (a) {
 403                 case 0x58: d = rot_comp.Reg_58; break;
 404                 case 0x5A: d = rot_comp.Reg_5A; break;
 405                 case 0x5C: d = rot_comp.Reg_5C; break;
 406                 case 0x5E: d = rot_comp.Reg_5E; break;
 407                 case 0x60: d = rot_comp.Reg_60; break;
 408                 case 0x62: d = rot_comp.Reg_62; break;
 409                 case 0x64: d = rot_comp.Reg_64; break;
 410                 case 0x66: break;
 411                 default: dprintf("gfx_cd_read FIXME: unexpected address: %02x", a); break;
 412         }
 413
 414         dprintf("gfx_cd_read(%02x) = %04x", a, d);
 415
 416         return 0;
 417 }
 418
 419 void gfx_cd_write16(unsigned int a, unsigned int d)
 420 {
 421         dprintf("gfx_cd_write16(%x, %04x)", a, d);
 422
 423         switch (a) {
 424                 case 0x58: // .Reg_Stamp_Size
 425                         rot_comp.Reg_58 = d & 7;
 426                         return;
 427
 428                 case 0x5A: // .Reg_Stamp_Adr
 429                         rot_comp.Reg_5A = d & 0xffe0;
 430                         return;
 431
 432                 case 0x5C: // .Reg_IM_VCell_Size
 433                         rot_comp.Reg_5C = d & 0x1f;
 434                         return;
 435
 436                 case 0x5E: // .Reg_IM_Adr
 437                         rot_comp.Reg_5E = d & 0xFFF8;
 438                         return;
 439
 440                 case 0x60: // .Reg_IM_Offset
 441                         rot_comp.Reg_60 = d & 0x3f;
 442                         return;
 443
 444                 case 0x62: // .Reg_IM_HDot_Size
 445                         rot_comp.Reg_62 = d & 0x1ff;
 446                         return;
 447
 448                 case 0x64: // .Reg_IM_VDot_Size
 449                         rot_comp.Reg_64 = d & 0xff;     // V_Dot, must be 32bit?
 450                         return;
 451
 452                 case 0x66: // .Reg_Vector_Adr
 453                         rot_comp.Reg_66 = d & 0xfffe;
 454                         if (Pico_mcd->s68k_regs[3]&4) return; // can't do tanformations in 1M mode
 455                         gfx_cd_start();
 456                         return;
 457
 458                 default: dprintf("gfx_cd_write16 FIXME: unexpected address: %02x", a); return;
 459         }
 460 }
 461
 462
 463 void gfx_cd_reset(void)
 464 {
 465         memset(&rot_comp.Reg_58, 0, sizeof(rot_comp));
 466 }
 467
 468
 469 // --------------------------------
 470
 471 #include "cell_map.c"
 472
 473 typedef unsigned short u16;
 474
 475 // check: Heart of the alien, jaguar xj 220
 476 void DmaSlowCell(unsigned int source, unsigned int a, int len, unsigned char inc)
 477 {
 478   unsigned char *base;
 479   unsigned int asrc, a2;
 480   u16 *r;
 481
 482   base = Pico_mcd->word_ram1M[Pico_mcd->s68k_regs[3]&1];
 483
 484   switch (Pico.video.type)
 485   {
 486     case 1: // vram
 487       r = Pico.vram;
 488       for(; len; len--)
 489       {
 490         asrc = cell_map(source >> 2) << 2;
 491         asrc |= source & 2;
 492         // if(a&1) d=(d<<8)|(d>>8); // ??
 493         r[a>>1] = *(u16 *)(base + asrc);
 494         source += 2;
 495         // AutoIncrement
 496         a=(u16)(a+inc);
 497       }
 498       rendstatus|=0x10;
 499       break;
 500
 501     case 3: // cram
 502       Pico.m.dirtyPal = 1;
 503       r = Pico.cram;
 504       for(a2=a&0x7f; len; len--)
 505       {
 506         asrc = cell_map(source >> 2) << 2;
 507         asrc |= source & 2;
 508         r[a2>>1] = *(u16 *)(base + asrc);
 509         source += 2;
 510         // AutoIncrement
 511         a2+=inc;
 512         // good dest?
 513         if(a2 >= 0x80) break;
 514       }
 515       a=(a&0xff00)|a2;
 516       break;
 517
 518     case 5: // vsram[a&0x003f]=d;
 519       r = Pico.vsram;
 520       for(a2=a&0x7f; len; len--)
 521       {
 522         asrc = cell_map(source >> 2) << 2;
 523         asrc |= source & 2;
 524         r[a2>>1] = *(u16 *)(base + asrc);
 525         source += 2;
 526         // AutoIncrement
 527         a2+=inc;
 528         // good dest?
 529         if(a2 >= 0x80) break;
 530       }
 531       a=(a&0xff00)|a2;
 532       break;
 533   }
 534   // remember addr
 535   Pico.video.addr=(u16)a;
 536 }
 537