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(unsigned int func, unsigned short *stamp_base, unsigned int H_Dot)
  83 {
  84         unsigned int eax, ebx, ecx, edx, esi, edi, pixel;
  85         unsigned int XD, Buffer_Adr;
  86         int DYXS;
  87
  88         XD = rot_comp.Reg_60 & 7;
  89         Buffer_Adr = ((rot_comp.Reg_5E & 0xfff8) + rot_comp.YD) << 2;
  90         ecx = *(unsigned int *)(Pico_mcd->word_ram2M + rot_comp.Vector_Adr);
  91         edx = ecx >> 16;
  92         ecx = (ecx & 0xffff) << 8;
  93         edx <<= 8;
  94         DYXS = *(int *)(Pico_mcd->word_ram2M + rot_comp.Vector_Adr + 4);
  95         rot_comp.Vector_Adr += 8;
  96
  97         // MAKE_IMAGE_LINE
  98         while (H_Dot)
  99         {
 100                 if (func & 2)           // mode 32x32 dot
 101                 {
 102                         if (func & 4)   // 16x16 screen
 103                         {
 104                                 ebx = ((ecx >> (11+5)) & 0x007f) |
 105                                       ((edx >> (11-2)) & 0x3f80);
 106                         }
 107                         else            // 1x1 screen
 108                         {
 109                                 ebx = ((ecx >> (11+5)) & 0x07) |
 110                                       ((edx >> (11+2)) & 0x38);
 111                         }
 112                 }
 113                 else                    // mode 16x16 dot
 114                 {
 115                         if (func & 4)   // 16x16 screen
 116                         {
 117                                 ebx = ((ecx >> (11+4)) & 0x00ff) |
 118                                       ((edx >> (11-4)) & 0xff00);
 119                         }
 120                         else            // 1x1 screen
 121                         {
 122                                 ebx = ((ecx >> (11+4)) & 0x0f) |
 123                                       ((edx >> (11+0)) & 0xf0);
 124                         }
 125                 }
 126
 127                 // MAKE_IMAGE_PIXEL
 128                 if (!(func & 1))        // NOT TILED
 129                 {
 130                         int mask = (func & 4) ? 0x00800000 : 0x00f80000;
 131                         if ((ecx | edx) & mask)
 132                         {
 133                                 if (func & 0x18) goto Next_Pixel;
 134                                 pixel = 0;
 135                                 goto Pixel_Out;
 136                         }
 137                 }
 138
 139                 edi = stamp_base[ebx];// | (stamp_base[ebx+1] << 16);
 140                 esi = (edi & 0x7ff) << 7;
 141                 if (!esi) { pixel = 0; goto Pixel_Out; }
 142                 edi >>= (11+1);
 143                 edi &= (0x1c>>1);
 144                 eax = ecx;
 145                 ebx = edx;
 146                 if (func & 2) edi |= 1; // 32 dots?
 147                 switch (edi)
 148                 {
 149                         case 0x00:      // No_Flip_0, 16x16 dots
 150                                 ebx = (ebx >> 9) & 0x3c;
 151                                 ebx += esi;
 152                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 153                                 eax = ((eax >> 8) & 0x40) + ebx;
 154                                 break;
 155                         case 0x01:      // No_Flip_0, 32x32 dots
 156                                 ebx = (ebx >> 9) & 0x7c;
 157                                 ebx += esi;
 158                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 159                                 eax = ((eax >> 7) & 0x180) + ebx;
 160                                 break;
 161                         case 0x02:      // No_Flip_90, 16x16 dots
 162                                 eax = (eax >> 9) & 0x3c;
 163                                 eax += esi;
 164                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap
 165                                 eax += ((ebx >> 8) & 0x40) ^ 0x40;
 166                                 break;
 167                         case 0x03:      // No_Flip_90, 32x32 dots
 168                                 eax = (eax >> 9) & 0x7c;
 169                                 eax += esi;
 170                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap
 171                                 eax += ((ebx >> 7) & 0x180) ^ 0x180;
 172                                 break;
 173                         case 0x04:      // No_Flip_180, 16x16 dots
 174                                 ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
 175                                 ebx += esi;
 176                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap and flip
 177                                 eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
 178                                 break;
 179                         case 0x05:      // No_Flip_180, 32x32 dots
 180                                 ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
 181                                 ebx += esi;
 182                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap and flip
 183                                 eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
 184                                 break;
 185                         case 0x06:      // No_Flip_270, 16x16 dots
 186                                 eax = ((eax >> 9) & 0x3c) ^ 0x3c;
 187                                 eax += esi;
 188                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap
 189                                 eax += (ebx >> 8) & 0x40;
 190                                 break;
 191                         case 0x07:      // No_Flip_270, 32x32 dots
 192                                 eax = ((eax >> 9) & 0x7c) ^ 0x7c;
 193                                 eax += esi;
 194                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap
 195                                 eax += (ebx >> 7) & 0x180;
 196                                 break;
 197                         case 0x08:      // Flip_0, 16x16 dots
 198                                 ebx = (ebx >> 9) & 0x3c;
 199                                 ebx += esi;
 200                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap, flip
 201                                 eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
 202                                 break;
 203                         case 0x09:      // Flip_0, 32x32 dots
 204                                 ebx = (ebx >> 9) & 0x7c;
 205                                 ebx += esi;
 206                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap, flip
 207                                 eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
 208                                 break;
 209                         case 0x0a:      // Flip_90, 16x16 dots
 210                                 eax = ((eax >> 9) & 0x3c) ^ 0x3c;
 211                                 eax += esi;
 212                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap, flip
 213                                 eax += ((ebx >> 8) & 0x40) ^ 0x40;
 214                                 break;
 215                         case 0x0b:      // Flip_90, 32x32 dots
 216                                 eax = ((eax >> 9) & 0x7c) ^ 0x7c;
 217                                 eax += esi;
 218                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap, flip
 219                                 eax += ((ebx >> 7) & 0x180) ^ 0x180;
 220                                 break;
 221                         case 0x0c:      // Flip_180, 16x16 dots
 222                                 ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
 223                                 ebx += esi;
 224                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 225                                 eax = ((eax >> 8) & 0x40) + ebx;
 226                                 break;
 227                         case 0x0d:      // Flip_180, 32x32 dots
 228                                 ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
 229                                 ebx += esi;
 230                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
 231                                 eax = ((eax >> 7) & 0x180) + ebx;
 232                                 break;
 233                         case 0x0e:      // Flip_270, 16x16 dots
 234                                 eax = (eax >> 9) & 0x3c;
 235                                 eax += esi;
 236                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap, flip
 237                                 eax += (ebx >> 8) & 0x40;
 238                                 break;
 239                         case 0x0f:      // Flip_270, 32x32 dots
 240                                 eax = (eax >> 9) & 0x7c;
 241                                 eax += esi;
 242                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap, flip
 243                                 eax += (ebx >> 7) & 0x180;
 244                                 break;
 245                 }
 246
 247                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
 248                 if (!(edi & 0x800)) pixel >>= 4;
 249                 else pixel &= 0x0f;
 250
 251 Pixel_Out:
 252                 if (!pixel && (func & 0x18)) goto Next_Pixel;
 253                 esi = Buffer_Adr + ((XD>>1)^1);                         // pixel addr
 254                 eax = *(Pico_mcd->word_ram2M + esi);                    // old pixel
 255                 if (XD & 1)
 256                 {
 257                         if ((eax & 0x0f) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
 258                         *(Pico_mcd->word_ram2M + esi) = pixel | (eax & 0xf0);
 259                 }
 260                 else
 261                 {
 262                         if ((eax & 0xf0) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
 263                         *(Pico_mcd->word_ram2M + esi) = (pixel << 4) | (eax & 0xf);
 264                 }
 265
 266
 267 Next_Pixel:
 268                 ecx += (DYXS << 16) >> 16;      // rot_comp.DXS;
 269                 edx +=  DYXS >> 16;             // rot_comp.DYS;
 270                 XD++;
 271                 if (XD >= 8)
 272                 {
 273                         Buffer_Adr += ((rot_comp.Reg_5C & 0x1f) + 1) << 5;
 274                         XD = 0;
 275                 }
 276                 H_Dot--;
 277         }
 278         // end while
 279
 280
 281 // nothing_to_draw:
 282         rot_comp.YD++;
 283         // rot_comp.V_Dot--; // will be done by caller
 284 }
 285
 286
 287 void gfx_cd_update(void)
 288 {
 289         int V_Dot = rot_comp.Reg_64 & 0xff;
 290         int jobs;
 291
 292         dprintf("gfx_cd_update, Reg_64 = %04x", rot_comp.Reg_64);
 293
 294         if (!V_Dot)
 295         {
 296                 gfx_completed();
 297                 return;
 298         }
 299
 300         jobs = rot_comp.Float_Part >> 16;
 301
 302         if (!jobs)
 303         {
 304                 rot_comp.Float_Part += rot_comp.Draw_Speed;
 305                 return;
 306         }
 307
 308         rot_comp.Float_Part &= 0xffff;
 309         rot_comp.Float_Part += rot_comp.Draw_Speed;
 310
 311         if (PicoOpt & 0x1000)                   // scale/rot enabled
 312         {
 313                 unsigned int func = rot_comp.Function;
 314                 unsigned int H_Dot = rot_comp.Reg_62 & 0x1ff;
 315                 unsigned short *stamp_base = (unsigned short *) (Pico_mcd->word_ram2M + rot_comp.Stamp_Map_Adr);
 316
 317                 while (jobs--)
 318                 {
 319                         gfx_do(func, stamp_base, H_Dot);        // jmp [Jmp_Adr]:
 320
 321                         V_Dot--;                                // dec byte [V_Dot]
 322                         if (V_Dot == 0)
 323                         {
 324                                 // GFX_Completed:
 325                                 gfx_completed();
 326                                 return;
 327                         }
 328                 }
 329         }
 330         else
 331         {
 332                 if (jobs >= V_Dot)
 333                 {
 334                         gfx_completed();
 335                         return;
 336                 }
 337                 V_Dot -= jobs;
 338         }
 339
 340         rot_comp.Reg_64 = V_Dot;
 341 }
 342
 343
 344 unsigned int gfx_cd_read(unsigned int a)
 345 {
 346         unsigned int d = 0;
 347
 348         switch (a) {
 349                 case 0x58: d = rot_comp.Reg_58; break;
 350                 case 0x5A: d = rot_comp.Reg_5A; break;
 351                 case 0x5C: d = rot_comp.Reg_5C; break;
 352                 case 0x5E: d = rot_comp.Reg_5E; break;
 353                 case 0x60: d = rot_comp.Reg_60; break;
 354                 case 0x62: d = rot_comp.Reg_62; break;
 355                 case 0x64: d = rot_comp.Reg_64; break;
 356                 case 0x66: break;
 357                 default: dprintf("gfx_cd_read FIXME: unexpected address: %02x", a); break;
 358         }
 359
 360         dprintf("gfx_cd_read(%02x) = %04x", a, d);
 361
 362         return 0;
 363 }
 364
 365 void gfx_cd_write16(unsigned int a, unsigned int d)
 366 {
 367         dprintf("gfx_cd_write16(%x, %04x)", a, d);
 368
 369         switch (a) {
 370                 case 0x58: // .Reg_Stamp_Size
 371                         rot_comp.Reg_58 = d & 7;
 372                         return;
 373
 374                 case 0x5A: // .Reg_Stamp_Adr
 375                         rot_comp.Reg_5A = d & 0xffe0;
 376                         return;
 377
 378                 case 0x5C: // .Reg_IM_VCell_Size
 379                         rot_comp.Reg_5C = d & 0x1f;
 380                         return;
 381
 382                 case 0x5E: // .Reg_IM_Adr
 383                         rot_comp.Reg_5E = d & 0xFFF8;
 384                         return;
 385
 386                 case 0x60: // .Reg_IM_Offset
 387                         rot_comp.Reg_60 = d & 0x3f;
 388                         return;
 389
 390                 case 0x62: // .Reg_IM_HDot_Size
 391                         rot_comp.Reg_62 = d & 0x1ff;
 392                         return;
 393
 394                 case 0x64: // .Reg_IM_VDot_Size
 395                         rot_comp.Reg_64 = d & 0xff;     // V_Dot, must be 32bit?
 396                         return;
 397
 398                 case 0x66: // .Reg_Vector_Adr
 399                         rot_comp.Reg_66 = d & 0xfffe;
 400                         if (Pico_mcd->s68k_regs[3]&4) return; // can't do tanformations in 1M mode
 401                         gfx_cd_start();
 402                         return;
 403
 404                 default: dprintf("gfx_cd_write16 FIXME: unexpected address: %02x", a); return;
 405         }
 406 }
 407
 408
 409 void gfx_cd_reset(void)
 410 {
 411         memset(&rot_comp.Reg_58, 0, sizeof(rot_comp));
 412 }
 413
 414
 415 // --------------------------------
 416
 417 #include "cell_map.c"
 418
 419 typedef unsigned short u16;
 420
 421 // check: Heart of the alien, jaguar xj 220
 422 void DmaSlowCell(unsigned int source, unsigned int a, int len, unsigned char inc)
 423 {
 424   unsigned char *base;
 425   unsigned int asrc, a2;
 426   u16 *r;
 427
 428   base = Pico_mcd->word_ram1M[Pico_mcd->s68k_regs[3]&1];
 429
 430   switch (Pico.video.type)
 431   {
 432     case 1: // vram
 433       r = Pico.vram;
 434       for(; len; len--)
 435       {
 436         asrc = cell_map(source >> 2) << 2;
 437         asrc |= source & 2;
 438         // if(a&1) d=(d<<8)|(d>>8); // ??
 439         r[a>>1] = *(u16 *)(base + asrc);
 440         source += 2;
 441         // AutoIncrement
 442         a=(u16)(a+inc);
 443       }
 444       rendstatus|=0x10;
 445       break;
 446
 447     case 3: // cram
 448       Pico.m.dirtyPal = 1;
 449       r = Pico.cram;
 450       for(a2=a&0x7f; len; len--)
 451       {
 452         asrc = cell_map(source >> 2) << 2;
 453         asrc |= source & 2;
 454         r[a2>>1] = *(u16 *)(base + asrc);
 455         source += 2;
 456         // AutoIncrement
 457         a2+=inc;
 458         // good dest?
 459         if(a2 >= 0x80) break;
 460       }
 461       a=(a&0xff00)|a2;
 462       break;
 463
 464     case 5: // vsram[a&0x003f]=d;
 465       r = Pico.vsram;
 466       for(a2=a&0x7f; len; len--)
 467       {
 468         asrc = cell_map(source >> 2) << 2;
 469         asrc |= source & 2;
 470         r[a2>>1] = *(u16 *)(base + asrc);
 471         source += 2;
 472         // AutoIncrement
 473         a2+=inc;
 474         // good dest?
 475         if(a2 >= 0x80) break;
 476       }
 477       a=(a&0xff00)|a2;
 478       break;
 479   }
 480   // remember addr
 481   Pico.video.addr=(u16)a;
 482 }
 483