120b0ddddaf3acf6b7a55b6887a4d2b1df8f6b30
[picodrive.git] / Pico / cd / gfx_cd.c
1
2 #include "../PicoInt.h"
3
4 #define rot_comp Pico_mcd->rot_comp
5
6 static const int Table_Rot_Time[] =
7 {
8         0x00054000, 0x00048000, 0x00040000, 0x00036000,          //; 008-032               ; briefing - sprite
9         0x0002E000, 0x00028000, 0x00024000, 0x00022000,          //; 036-064               ; arbre souvent
10         0x00021000, 0x00020000, 0x0001E000, 0x0001B800,          //; 068-096               ; map thunderstrike
11         0x00019800, 0x00017A00, 0x00015C00, 0x00013E00,          //; 100-128               ; logo défoncé
12
13         0x00012000, 0x00011800, 0x00011000, 0x00010800,          //; 132-160               ; briefing - map
14         0x00010000, 0x0000F800, 0x0000F000, 0x0000E800,          //; 164-192
15         0x0000E000, 0x0000D800, 0x0000D000, 0x0000C800,          //; 196-224
16         0x0000C000, 0x0000B800, 0x0000B000, 0x0000A800,          //; 228-256               ; batman visage
17
18         0x0000A000, 0x00009F00, 0x00009E00, 0x00009D00,          //; 260-288
19         0x00009C00, 0x00009B00, 0x00009A00, 0x00009900,          //; 292-320
20         0x00009800, 0x00009700, 0x00009600, 0x00009500,          //; 324-352
21         0x00009400, 0x00009300, 0x00009200, 0x00009100,          //; 356-384
22
23         0x00009000, 0x00008F00, 0x00008E00, 0x00008D00,          //; 388-416
24         0x00008C00, 0x00008B00, 0x00008A00, 0x00008900,          //; 420-448
25         0x00008800, 0x00008700, 0x00008600, 0x00008500,          //; 452-476
26         0x00008400, 0x00008300, 0x00008200, 0x00008100,          //; 480-512
27 };
28
29
30 static void gfx_cd_start(void)
31 {
32         int upd_len;
33
34         // rot_comp.XD_Mul = ((rot_comp.Reg_5C & 0x1f) + 1) * 4; // unused
35         rot_comp.Function = (rot_comp.Reg_58 & 7) | (Pico_mcd->s68k_regs[3] & 0x18);    // Jmp_Adr
36         // rot_comp.Buffer_Adr = (rot_comp.Reg_5E & 0xfff8) << 2; // unused?
37         rot_comp.YD = (rot_comp.Reg_60 >> 3) & 7;
38         rot_comp.Vector_Adr = (rot_comp.Reg_66 & 0xfffe) << 2;
39
40         upd_len = (rot_comp.Reg_62 >> 3) & 0x3f;
41         upd_len = Table_Rot_Time[upd_len];
42         rot_comp.Draw_Speed = rot_comp.Float_Part = upd_len;
43
44         rot_comp.Reg_58 |= 0x8000;      // Stamp_Size,  we start a new GFX operation
45
46         switch (rot_comp.Reg_58 & 6)    // Scr_16?
47         {
48                 case 0: // ?
49                         rot_comp.Stamp_Map_Adr = (rot_comp.Reg_5A & 0xff80) << 2;
50                         break;
51                 case 2: // .Dot_32
52                         rot_comp.Stamp_Map_Adr = (rot_comp.Reg_5A & 0xffe0) << 2;
53                         break;
54                 case 4: // .Scr_16
55                         rot_comp.Stamp_Map_Adr = 0x20000;
56                         break;
57                 case 6: // .Scr_16_Dot_32
58                         rot_comp.Stamp_Map_Adr = (rot_comp.Reg_5A & 0xe000) << 2;
59                         break;
60         }
61
62         dprintf("gfx_cd_start, stamp_map_addr=%06x", rot_comp.Stamp_Map_Adr);
63
64         gfx_cd_update();
65 }
66
67
68 static void gfx_completed(void)
69 {
70         rot_comp.Reg_58 &= 0x7fff;      // Stamp_Size
71         rot_comp.Reg_64  = 0;
72         if (Pico_mcd->s68k_regs[0x33] & (1<<1))
73         {
74                 dprintf("gfx_cd irq 1");
75                 SekInterruptS68k(1);
76         }
77 }
78
79
80 static void gfx_do(unsigned int func, unsigned short *stamp_base, unsigned int H_Dot)
81 {
82         unsigned int eax, ebx, ecx, edx, esi, edi, pixel;
83         unsigned int XD, Buffer_Adr;
84         int DYXS;
85
86         XD = rot_comp.Reg_60 & 7;
87         Buffer_Adr = ((rot_comp.Reg_5E & 0xfff8) + rot_comp.YD) << 2;
88         ecx = *(unsigned int *)(Pico_mcd->word_ram2M + rot_comp.Vector_Adr);
89         edx = ecx >> 16;
90         ecx = (ecx & 0xffff) << 8;
91         edx <<= 8;
92         DYXS = *(int *)(Pico_mcd->word_ram2M + rot_comp.Vector_Adr + 4);
93         rot_comp.Vector_Adr += 8;
94
95         // MAKE_IMAGE_LINE
96         while (H_Dot)
97         {
98                 // MAKE_IMAGE_PIXEL
99                 if (!(func & 1))        // NOT TILED
100                 {
101                         int mask = (func & 4) ? 0x00800000 : 0x00f80000;
102                         if ((ecx | edx) & mask)
103                         {
104                                 if (func & 0x18) goto Next_Pixel;
105                                 pixel = 0;
106                                 goto Pixel_Out;
107                         }
108                 }
109
110                 if (func & 2)           // mode 32x32 dot
111                 {
112                         if (func & 4)   // 16x16 screen
113                         {
114                                 ebx = ((ecx >> (11+5)) & 0x007f) |
115                                       ((edx >> (11-2)) & 0x3f80);
116                         }
117                         else            // 1x1 screen
118                         {
119                                 ebx = ((ecx >> (11+5)) & 0x07) |
120                                       ((edx >> (11+2)) & 0x38);
121                         }
122                 }
123                 else                    // mode 16x16 dot
124                 {
125                         if (func & 4)   // 16x16 screen
126                         {
127                                 ebx = ((ecx >> (11+4)) & 0x00ff) |
128                                       ((edx >> (11-4)) & 0xff00);
129                         }
130                         else            // 1x1 screen
131                         {
132                                 ebx = ((ecx >> (11+4)) & 0x0f) |
133                                       ((edx >> (11+0)) & 0xf0);
134                         }
135                 }
136
137                 edi = stamp_base[ebx];
138                 esi = (edi & 0x7ff) << 7;
139                 if (!esi) { pixel = 0; goto Pixel_Out; }
140                 edi >>= (11+1);
141                 edi &= (0x1c>>1);
142                 eax = ecx;
143                 ebx = edx;
144                 if (func & 2) edi |= 1; // 32 dots?
145                 switch (edi)
146                 {
147                         case 0x00:      // No_Flip_0, 16x16 dots
148                                 ebx = (ebx >> 9) & 0x3c;
149                                 ebx += esi;
150                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
151                                 eax = ((eax >> 8) & 0x40) + ebx;
152                                 break;
153                         case 0x01:      // No_Flip_0, 32x32 dots
154                                 ebx = (ebx >> 9) & 0x7c;
155                                 ebx += esi;
156                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
157                                 eax = ((eax >> 7) & 0x180) + ebx;
158                                 break;
159                         case 0x02:      // No_Flip_90, 16x16 dots
160                                 eax = (eax >> 9) & 0x3c;
161                                 eax += esi;
162                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap
163                                 eax += ((ebx >> 8) & 0x40) ^ 0x40;
164                                 break;
165                         case 0x03:      // No_Flip_90, 32x32 dots
166                                 eax = (eax >> 9) & 0x7c;
167                                 eax += esi;
168                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap
169                                 eax += ((ebx >> 7) & 0x180) ^ 0x180;
170                                 break;
171                         case 0x04:      // No_Flip_180, 16x16 dots
172                                 ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
173                                 ebx += esi;
174                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap and flip
175                                 eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
176                                 break;
177                         case 0x05:      // No_Flip_180, 32x32 dots
178                                 ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
179                                 ebx += esi;
180                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap and flip
181                                 eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
182                                 break;
183                         case 0x06:      // No_Flip_270, 16x16 dots
184                                 eax = ((eax >> 9) & 0x3c) ^ 0x3c;
185                                 eax += esi;
186                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap
187                                 eax += (ebx >> 8) & 0x40;
188                                 break;
189                         case 0x07:      // No_Flip_270, 32x32 dots
190                                 eax = ((eax >> 9) & 0x7c) ^ 0x7c;
191                                 eax += esi;
192                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap
193                                 eax += (ebx >> 7) & 0x180;
194                                 break;
195                         case 0x08:      // Flip_0, 16x16 dots
196                                 ebx = (ebx >> 9) & 0x3c;
197                                 ebx += esi;
198                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap, flip
199                                 eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
200                                 break;
201                         case 0x09:      // Flip_0, 32x32 dots
202                                 ebx = (ebx >> 9) & 0x7c;
203                                 ebx += esi;
204                                 edi = (eax & 0x3800) ^ 0x2800;          // bswap, flip
205                                 eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
206                                 break;
207                         case 0x0a:      // Flip_90, 16x16 dots
208                                 eax = ((eax >> 9) & 0x3c) ^ 0x3c;
209                                 eax += esi;
210                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap, flip
211                                 eax += ((ebx >> 8) & 0x40) ^ 0x40;
212                                 break;
213                         case 0x0b:      // Flip_90, 32x32 dots
214                                 eax = ((eax >> 9) & 0x7c) ^ 0x7c;
215                                 eax += esi;
216                                 edi = (ebx & 0x3800) ^ 0x2800;          // bswap, flip
217                                 eax += ((ebx >> 7) & 0x180) ^ 0x180;
218                                 break;
219                         case 0x0c:      // Flip_180, 16x16 dots
220                                 ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
221                                 ebx += esi;
222                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
223                                 eax = ((eax >> 8) & 0x40) + ebx;
224                                 break;
225                         case 0x0d:      // Flip_180, 32x32 dots
226                                 ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
227                                 ebx += esi;
228                                 edi = (eax & 0x3800) ^ 0x1000;          // bswap
229                                 eax = ((eax >> 7) & 0x180) + ebx;
230                                 break;
231                         case 0x0e:      // Flip_270, 16x16 dots
232                                 eax = (eax >> 9) & 0x3c;
233                                 eax += esi;
234                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap, flip
235                                 eax += (ebx >> 8) & 0x40;
236                                 break;
237                         case 0x0f:      // Flip_270, 32x32 dots
238                                 eax = (eax >> 9) & 0x7c;
239                                 eax += esi;
240                                 edi = (ebx & 0x3800) ^ 0x1000;          // bswap, flip
241                                 eax += (ebx >> 7) & 0x180;
242                                 break;
243                 }
244
245                 pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
246                 if (!(edi & 0x800)) pixel >>= 4;
247                 else pixel &= 0x0f;
248
249 Pixel_Out:
250                 if (!pixel && (func & 0x18)) goto Next_Pixel;
251                 esi = Buffer_Adr + ((XD>>1)^1);                         // pixel addr
252                 eax = *(Pico_mcd->word_ram2M + esi);                    // old pixel
253                 if (XD & 1)
254                 {
255                         if ((eax & 0x0f) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
256                         *(Pico_mcd->word_ram2M + esi) = pixel | (eax & 0xf0);
257                 }
258                 else
259                 {
260                         if ((eax & 0xf0) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
261                         *(Pico_mcd->word_ram2M + esi) = (pixel << 4) | (eax & 0xf);
262                 }
263
264
265 Next_Pixel:
266                 ecx += (DYXS << 16) >> 16;      // rot_comp.DXS;
267                 edx +=  DYXS >> 16;             // rot_comp.DYS;
268                 XD++;
269                 if (XD >= 8)
270                 {
271                         Buffer_Adr += ((rot_comp.Reg_5C & 0x1f) + 1) << 5;
272                         XD = 0;
273                 }
274                 H_Dot--;
275         }
276         // end while
277
278
279 // nothing_to_draw:
280         rot_comp.YD++;
281         // rot_comp.V_Dot--; // will be done by caller
282 }
283
284
285 void gfx_cd_update(void)
286 {
287         int V_Dot = rot_comp.Reg_64 & 0xff;
288         int jobs;
289
290         dprintf("gfx_cd_update, Reg_64 = %04x", rot_comp.Reg_64);
291
292         if (!V_Dot)
293         {
294                 gfx_completed();
295                 return;
296         }
297
298         jobs = rot_comp.Float_Part >> 16;
299
300         if (!jobs)
301         {
302                 rot_comp.Float_Part += rot_comp.Draw_Speed;
303                 return;
304         }
305
306         rot_comp.Float_Part &= 0xffff;
307         rot_comp.Float_Part += rot_comp.Draw_Speed;
308
309         if (PicoOpt & 0x1000)                   // scale/rot enabled
310         {
311                 unsigned int func = rot_comp.Function;
312                 unsigned int H_Dot = rot_comp.Reg_62 & 0x1ff;
313                 unsigned short *stamp_base = (unsigned short *) (Pico_mcd->word_ram2M + rot_comp.Stamp_Map_Adr);
314
315                 while (jobs--)
316                 {
317                         gfx_do(func, stamp_base, H_Dot);        // jmp [Jmp_Adr]:
318
319                         V_Dot--;                                // dec byte [V_Dot]
320                         if (V_Dot == 0)
321                         {
322                                 // GFX_Completed:
323                                 gfx_completed();
324                                 return;
325                         }
326                 }
327         }
328         else
329         {
330                 if (jobs >= V_Dot)
331                 {
332                         gfx_completed();
333                         return;
334                 }
335                 V_Dot -= jobs;
336         }
337
338         rot_comp.Reg_64 = V_Dot;
339 }
340
341
342 unsigned int gfx_cd_read(unsigned int a)
343 {
344         unsigned int d = 0;
345
346         switch (a) {
347                 case 0x58: d = rot_comp.Reg_58; break;
348                 case 0x5A: d = rot_comp.Reg_5A; break;
349                 case 0x5C: d = rot_comp.Reg_5C; break;
350                 case 0x5E: d = rot_comp.Reg_5E; break;
351                 case 0x60: d = rot_comp.Reg_60; break;
352                 case 0x62: d = rot_comp.Reg_62; break;
353                 case 0x64: d = rot_comp.Reg_64; break;
354                 case 0x66: break;
355                 default: dprintf("gfx_cd_read FIXME: unexpected address: %02x", a); break;
356         }
357
358         dprintf("gfx_cd_read(%02x) = %04x", a, d);
359
360         return d;
361 }
362
363 void gfx_cd_write16(unsigned int a, unsigned int d)
364 {
365         dprintf("gfx_cd_write16(%x, %04x)", a, d);
366
367         switch (a) {
368                 case 0x58: // .Reg_Stamp_Size
369                         rot_comp.Reg_58 = d & 7;
370                         return;
371
372                 case 0x5A: // .Reg_Stamp_Adr
373                         rot_comp.Reg_5A = d & 0xffe0;
374                         return;
375
376                 case 0x5C: // .Reg_IM_VCell_Size
377                         rot_comp.Reg_5C = d & 0x1f;
378                         return;
379
380                 case 0x5E: // .Reg_IM_Adr
381                         rot_comp.Reg_5E = d & 0xFFF8;
382                         return;
383
384                 case 0x60: // .Reg_IM_Offset
385                         rot_comp.Reg_60 = d & 0x3f;
386                         return;
387
388                 case 0x62: // .Reg_IM_HDot_Size
389                         rot_comp.Reg_62 = d & 0x1ff;
390                         return;
391
392                 case 0x64: // .Reg_IM_VDot_Size
393                         rot_comp.Reg_64 = d & 0xff;     // V_Dot, must be 32bit?
394                         return;
395
396                 case 0x66: // .Reg_Vector_Adr
397                         rot_comp.Reg_66 = d & 0xfffe;
398                         if (Pico_mcd->s68k_regs[3]&4) return; // can't do tanformations in 1M mode
399                         gfx_cd_start();
400                         return;
401
402                 default: dprintf("gfx_cd_write16 FIXME: unexpected address: %02x", a); return;
403         }
404 }
405
406
407 void gfx_cd_reset(void)
408 {
409         memset(&rot_comp.Reg_58, 0, sizeof(rot_comp));
410 }
411
412
413 // --------------------------------
414
415 #include "cell_map.c"
416
417 typedef unsigned short u16;
418
419 // check: Heart of the alien, jaguar xj 220
420 void DmaSlowCell(unsigned int source, unsigned int a, int len, unsigned char inc)
421 {
422   unsigned char *base;
423   unsigned int asrc, a2;
424   u16 *r;
425
426   base = Pico_mcd->word_ram1M[Pico_mcd->s68k_regs[3]&1];
427
428   switch (Pico.video.type)
429   {
430     case 1: // vram
431       r = Pico.vram;
432       for(; len; len--)
433       {
434         asrc = cell_map(source >> 2) << 2;
435         asrc |= source & 2;
436         // if(a&1) d=(d<<8)|(d>>8); // ??
437         r[a>>1] = *(u16 *)(base + asrc);
438         source += 2;
439         // AutoIncrement
440         a=(u16)(a+inc);
441       }
442       rendstatus|=0x10;
443       break;
444
445     case 3: // cram
446       Pico.m.dirtyPal = 1;
447       r = Pico.cram;
448       for(a2=a&0x7f; len; len--)
449       {
450         asrc = cell_map(source >> 2) << 2;
451         asrc |= source & 2;
452         r[a2>>1] = *(u16 *)(base + asrc);
453         source += 2;
454         // AutoIncrement
455         a2+=inc;
456         // good dest?
457         if(a2 >= 0x80) break;
458       }
459       a=(a&0xff00)|a2;
460       break;
461
462     case 5: // vsram[a&0x003f]=d;
463       r = Pico.vsram;
464       for(a2=a&0x7f; len; len--)
465       {
466         asrc = cell_map(source >> 2) << 2;
467         asrc |= source & 2;
468         r[a2>>1] = *(u16 *)(base + asrc);
469         source += 2;
470         // AutoIncrement
471         a2+=inc;
472         // good dest?
473         if(a2 >= 0x80) break;
474       }
475       a=(a&0xff00)|a2;
476       break;
477   }
478   // remember addr
479   Pico.video.addr=(u16)a;
480 }
481