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1// This is part of Pico Library\r
2\r
3// (c) Copyright 2004 Dave, All rights reserved.\r
4// (c) Copyright 2006 notaz, All rights reserved.\r
5// Free for non-commercial use.\r
6\r
7// For commercial use, separate licencing terms must be obtained.\r
8\r
9\r
10#include "PicoInt.h"\r
11#ifndef __GNUC__\r
12#pragma warning (disable:4706) // Disable assignment within conditional\r
13#endif\r
14\r
15int (*PicoScan)(unsigned int num, void *data)=NULL;\r
16\r
17//unsigned short DefOutBuff[320*2];\r
18unsigned char HighCol[320*2];\r
19static int HighCacheA[41+1]; // caches for high layers\r
20static int HighCacheB[41+1];\r
21static int HighCacheS[80+1]; // and sprites\r
22static int HighPreSpr[80*2+1]; // slightly preprocessed sprites\r
23char HighSprZ[320+8+8]; // Z-buffer for accurate sprites and shadow/hilight mode\r
24 // (if bit 7 == 0, sh caused by tile; if bit 6 == 0 pixel must be shadowed, else hilighted, if bit5 == 1)\r
25// lsb->msb: moved sprites, all window tiles don't use same priority, accurate sprites (copied from PicoOpt), interlace\r
26// dirty sprites, sonic mode, 16bit mode\r
27int rendstatus=0x40;\r
28void *DrawLineDest=HighCol; // pointer to dest buffer where to draw this line to\r
29unsigned char *DrawLineInt=HighCol; // dest for internal code\r
30int Scanline=0; // Scanline\r
31\r
32static int SpriteBlocks;\r
33//unsigned short ppt[] = { 0x0f11, 0x0ff1, 0x01f1, 0x011f, 0x01ff, 0x0f1f, 0x0f0e, 0x0e7c };\r
34\r
35struct TileStrip\r
36{\r
37 int nametab; // Position in VRAM of name table (for this tile line)\r
38 int line; // Line number in pixels 0x000-0x3ff within the virtual tilemap \r
39 int hscroll; // Horizontal scroll value in pixels for the line\r
40 int xmask; // X-Mask (0x1f - 0x7f) for horizontal wraparound in the tilemap\r
41 int *hc; // cache for high tile codes and their positions\r
42 int cells; // cells (tiles) to draw (32 col mode doesn't need to update whole 320)\r
43};\r
44\r
45// stuff available in asm:\r
46#ifdef _ASM_DRAW_C\r
47void DrawWindow(int tstart, int tend, int prio, int sh);\r
48void BackFill(int reg7, int sh);\r
49void DrawSprite(int *sprite, int **hc, int sh);\r
50void DrawTilesFromCache(int *hc, int sh);\r
51void DrawSpritesFromCache(int *hc, int sh);\r
52void DrawLayer(int plane, int *hcache, int maxcells, int sh);\r
53void FinalizeLineBGR444(int sh);\r
54void FinalizeLineRGB555(int sh);\r
55void blockcpy_or(void *dst, void *src, size_t n, int pat);\r
56#else\r
57// utility\r
58void blockcpy_or(void *dst, void *src, size_t n, int pat)\r
59{\r
60 unsigned char *pd = dst, *ps = src;\r
61 for (; n; n--)\r
62 *pd++ = (unsigned char) (*ps++ | pat);\r
63}\r
64#endif\r
65\r
66\r
67static int TileNorm(int sx,int addr,int pal)\r
68{\r
69 unsigned char *pd = DrawLineInt+sx;\r
70 unsigned int pack=0; unsigned int t=0;\r
71\r
72 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
73 if (pack)\r
74 {\r
75 t=pack&0x0000f000; if (t) pd[0]=(unsigned char)(pal|(t>>12));\r
76 t=pack&0x00000f00; if (t) pd[1]=(unsigned char)(pal|(t>> 8));\r
77 t=pack&0x000000f0; if (t) pd[2]=(unsigned char)(pal|(t>> 4));\r
78 t=pack&0x0000000f; if (t) pd[3]=(unsigned char)(pal|(t ));\r
79 t=pack&0xf0000000; if (t) pd[4]=(unsigned char)(pal|(t>>28));\r
80 t=pack&0x0f000000; if (t) pd[5]=(unsigned char)(pal|(t>>24));\r
81 t=pack&0x00f00000; if (t) pd[6]=(unsigned char)(pal|(t>>20));\r
82 t=pack&0x000f0000; if (t) pd[7]=(unsigned char)(pal|(t>>16));\r
83 return 0;\r
84 }\r
85\r
86 return 1; // Tile blank\r
87}\r
88\r
89static int TileFlip(int sx,int addr,int pal)\r
90{\r
91 unsigned char *pd = DrawLineInt+sx;\r
92 unsigned int pack=0; unsigned int t=0;\r
93\r
94 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
95 if (pack)\r
96 {\r
97 t=pack&0x000f0000; if (t) pd[0]=(unsigned char)(pal|(t>>16));\r
98 t=pack&0x00f00000; if (t) pd[1]=(unsigned char)(pal|(t>>20));\r
99 t=pack&0x0f000000; if (t) pd[2]=(unsigned char)(pal|(t>>24));\r
100 t=pack&0xf0000000; if (t) pd[3]=(unsigned char)(pal|(t>>28));\r
101 t=pack&0x0000000f; if (t) pd[4]=(unsigned char)(pal|(t ));\r
102 t=pack&0x000000f0; if (t) pd[5]=(unsigned char)(pal|(t>> 4));\r
103 t=pack&0x00000f00; if (t) pd[6]=(unsigned char)(pal|(t>> 8));\r
104 t=pack&0x0000f000; if (t) pd[7]=(unsigned char)(pal|(t>>12));\r
105 return 0;\r
106 }\r
107 return 1; // Tile blank\r
108}\r
109\r
110\r
111// tile renderers for hacky operator sprite support\r
112#define sh_pix(x) \\r
113 if(!t); \\r
114 else if(t==0xe) pd[x]=(unsigned char)((pd[x]&0x3f)|0x80); /* hilight */ \\r
115 else if(t==0xf) pd[x]=(unsigned char)((pd[x]&0x3f)|0xc0); /* shadow */ \\r
116 else pd[x]=(unsigned char)(pal|t);\r
117\r
118#ifndef _ASM_DRAW_C\r
119static int TileNormSH(int sx,int addr,int pal)\r
120{\r
121 unsigned int pack=0; unsigned int t=0;\r
122 unsigned char *pd = DrawLineInt+sx;\r
123\r
124 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
125 if (pack)\r
126 {\r
127 t=(pack&0x0000f000)>>12; sh_pix(0);\r
128 t=(pack&0x00000f00)>> 8; sh_pix(1);\r
129 t=(pack&0x000000f0)>> 4; sh_pix(2);\r
130 t=(pack&0x0000000f) ; sh_pix(3);\r
131 t=(pack&0xf0000000)>>28; sh_pix(4);\r
132 t=(pack&0x0f000000)>>24; sh_pix(5);\r
133 t=(pack&0x00f00000)>>20; sh_pix(6);\r
134 t=(pack&0x000f0000)>>16; sh_pix(7);\r
135 return 0;\r
136 }\r
137\r
138 return 1; // Tile blank\r
139}\r
140\r
141static int TileFlipSH(int sx,int addr,int pal)\r
142{\r
143 unsigned int pack=0; unsigned int t=0;\r
144 unsigned char *pd = DrawLineInt+sx;\r
145\r
146 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
147 if (pack)\r
148 {\r
149 t=(pack&0x000f0000)>>16; sh_pix(0);\r
150 t=(pack&0x00f00000)>>20; sh_pix(1);\r
151 t=(pack&0x0f000000)>>24; sh_pix(2);\r
152 t=(pack&0xf0000000)>>28; sh_pix(3);\r
153 t=(pack&0x0000000f) ; sh_pix(4);\r
154 t=(pack&0x000000f0)>> 4; sh_pix(5);\r
155 t=(pack&0x00000f00)>> 8; sh_pix(6);\r
156 t=(pack&0x0000f000)>>12; sh_pix(7);\r
157 return 0;\r
158 }\r
159 return 1; // Tile blank\r
160}\r
161#endif\r
162\r
163static int TileNormZ(int sx,int addr,int pal,int zval)\r
164{\r
165 unsigned int pack=0; unsigned int t=0;\r
166 unsigned char *pd = DrawLineInt+sx;\r
167 char *zb = HighSprZ+sx;\r
168 int collision = 0, zb_s;\r
169\r
170 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
171 if (pack)\r
172 {\r
173 t=pack&0x0000f000; if(t) { zb_s=zb[0]; if(zb_s) collision=1; if(zval>zb_s) { pd[0]=(unsigned char)(pal|(t>>12)); zb[0]=(char)zval; } }\r
174 t=pack&0x00000f00; if(t) { zb_s=zb[1]; if(zb_s) collision=1; if(zval>zb_s) { pd[1]=(unsigned char)(pal|(t>> 8)); zb[1]=(char)zval; } }\r
175 t=pack&0x000000f0; if(t) { zb_s=zb[2]; if(zb_s) collision=1; if(zval>zb_s) { pd[2]=(unsigned char)(pal|(t>> 4)); zb[2]=(char)zval; } }\r
176 t=pack&0x0000000f; if(t) { zb_s=zb[3]; if(zb_s) collision=1; if(zval>zb_s) { pd[3]=(unsigned char)(pal|(t )); zb[3]=(char)zval; } }\r
177 t=pack&0xf0000000; if(t) { zb_s=zb[4]; if(zb_s) collision=1; if(zval>zb_s) { pd[4]=(unsigned char)(pal|(t>>28)); zb[4]=(char)zval; } }\r
178 t=pack&0x0f000000; if(t) { zb_s=zb[5]; if(zb_s) collision=1; if(zval>zb_s) { pd[5]=(unsigned char)(pal|(t>>24)); zb[5]=(char)zval; } }\r
179 t=pack&0x00f00000; if(t) { zb_s=zb[6]; if(zb_s) collision=1; if(zval>zb_s) { pd[6]=(unsigned char)(pal|(t>>20)); zb[6]=(char)zval; } }\r
180 t=pack&0x000f0000; if(t) { zb_s=zb[7]; if(zb_s) collision=1; if(zval>zb_s) { pd[7]=(unsigned char)(pal|(t>>16)); zb[7]=(char)zval; } }\r
181 if(collision) Pico.video.status|=0x20;\r
182 return 0;\r
183 }\r
184\r
185 return 1; // Tile blank\r
186}\r
187\r
188static int TileFlipZ(int sx,int addr,int pal,int zval)\r
189{\r
190 unsigned int pack=0; unsigned int t=0;\r
191 unsigned char *pd = DrawLineInt+sx;\r
192 char *zb = HighSprZ+sx;\r
193 int collision = 0, zb_s;\r
194\r
195 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
196 if (pack)\r
197 {\r
198 t=pack&0x000f0000; if(t) { zb_s=zb[0]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[0]=(unsigned char)(pal|(t>>16)); zb[0]=(char)zval; } }\r
199 t=pack&0x00f00000; if(t) { zb_s=zb[1]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[1]=(unsigned char)(pal|(t>>20)); zb[1]=(char)zval; } }\r
200 t=pack&0x0f000000; if(t) { zb_s=zb[2]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[2]=(unsigned char)(pal|(t>>24)); zb[2]=(char)zval; } }\r
201 t=pack&0xf0000000; if(t) { zb_s=zb[3]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[3]=(unsigned char)(pal|(t>>28)); zb[3]=(char)zval; } }\r
202 t=pack&0x0000000f; if(t) { zb_s=zb[4]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[4]=(unsigned char)(pal|(t )); zb[4]=(char)zval; } }\r
203 t=pack&0x000000f0; if(t) { zb_s=zb[5]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[5]=(unsigned char)(pal|(t>> 4)); zb[5]=(char)zval; } }\r
204 t=pack&0x00000f00; if(t) { zb_s=zb[6]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[6]=(unsigned char)(pal|(t>> 8)); zb[6]=(char)zval; } }\r
205 t=pack&0x0000f000; if(t) { zb_s=zb[7]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[7]=(unsigned char)(pal|(t>>12)); zb[7]=(char)zval; } }\r
206 if(collision) Pico.video.status|=0x20;\r
207 return 0;\r
208 }\r
209 return 1; // Tile blank\r
210}\r
211\r
212\r
213#define sh_pixZ(x) \\r
214 if(t) { \\r
215 if(zb[x]) collision=1; \\r
216 if(zval>zb[x]) { \\r
217 if (t==0xe) { pd[x]=(unsigned char)((pd[x]&0x3f)|0x80); /* hilight */ } \\r
218 else if(t==0xf) { pd[x]=(unsigned char)((pd[x]&0x3f)|0xc0); /* shadow */ } \\r
219 else { zb[x]=(char)zval; pd[x]=(unsigned char)(pal|t); } \\r
220 } \\r
221 }\r
222\r
223static int TileNormZSH(int sx,int addr,int pal,int zval)\r
224{\r
225 unsigned int pack=0; unsigned int t=0;\r
226 unsigned char *pd = DrawLineInt+sx;\r
227 char *zb = HighSprZ+sx;\r
228 int collision = 0;\r
229\r
230 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
231 if (pack)\r
232 {\r
233 t=(pack&0x0000f000)>>12; sh_pixZ(0);\r
234 t=(pack&0x00000f00)>> 8; sh_pixZ(1);\r
235 t=(pack&0x000000f0)>> 4; sh_pixZ(2);\r
236 t=(pack&0x0000000f) ; sh_pixZ(3);\r
237 t=(pack&0xf0000000)>>28; sh_pixZ(4);\r
238 t=(pack&0x0f000000)>>24; sh_pixZ(5);\r
239 t=(pack&0x00f00000)>>20; sh_pixZ(6);\r
240 t=(pack&0x000f0000)>>16; sh_pixZ(7);\r
241 if(collision) Pico.video.status|=0x20;\r
242 return 0;\r
243 }\r
244\r
245 return 1; // Tile blank\r
246}\r
247\r
248static int TileFlipZSH(int sx,int addr,int pal,int zval)\r
249{\r
250 unsigned int pack=0; unsigned int t=0;\r
251 unsigned char *pd = DrawLineInt+sx;\r
252 char *zb = HighSprZ+sx;\r
253 int collision = 0;\r
254\r
255 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
256 if (pack)\r
257 {\r
258 t=(pack&0x000f0000)>>16; sh_pixZ(0);\r
259 t=(pack&0x00f00000)>>20; sh_pixZ(1);\r
260 t=(pack&0x0f000000)>>24; sh_pixZ(2);\r
261 t=(pack&0xf0000000)>>28; sh_pixZ(3);\r
262 t=(pack&0x0000000f) ; sh_pixZ(4);\r
263 t=(pack&0x000000f0)>> 4; sh_pixZ(5);\r
264 t=(pack&0x00000f00)>> 8; sh_pixZ(6);\r
265 t=(pack&0x0000f000)>>12; sh_pixZ(7);\r
266 if(collision) Pico.video.status|=0x20;\r
267 return 0;\r
268 }\r
269 return 1; // Tile blank\r
270}\r
271\r
272// --------------------------------------------\r
273\r
274#ifndef _ASM_DRAW_C\r
275static void DrawStrip(struct TileStrip *ts, int sh)\r
276{\r
277 int tilex=0,dx=0,ty=0,code=0,addr=0,cells;\r
278 int oldcode=-1,blank=-1; // The tile we know is blank\r
279 int pal=0;\r
280\r
281 // Draw tiles across screen:\r
282 tilex=(-ts->hscroll)>>3;\r
283 ty=(ts->line&7)<<1; // Y-Offset into tile\r
284 dx=((ts->hscroll-1)&7)+1;\r
285 cells = ts->cells;\r
286 if(dx != 8) cells++; // have hscroll, need to draw 1 cell more\r
287\r
288 for (; cells; dx+=8,tilex++,cells--)\r
289 {\r
290 int zero=0;\r
291\r
292 code=Pico.vram[ts->nametab+(tilex&ts->xmask)];\r
293 if (code==blank) continue;\r
294 if (code>>15) { // high priority tile\r
295 int cval = code | (dx<<16) | (ty<<25);\r
296 if(code&0x1000) cval^=7<<26;\r
297 *ts->hc++ = cval; // cache it\r
298 continue;\r
299 }\r
300\r
301 if (code!=oldcode) {\r
302 oldcode = code;\r
303 // Get tile address/2:\r
304 addr=(code&0x7ff)<<4;\r
305 addr+=ty;\r
306 if (code&0x1000) addr^=0xe; // Y-flip\r
307\r
308// pal=Pico.cram+((code>>9)&0x30);\r
309 pal=((code>>9)&0x30)|(sh<<6);\r
310 }\r
311\r
312 if (code&0x0800) zero=TileFlip(dx,addr,pal);\r
313 else zero=TileNorm(dx,addr,pal);\r
314\r
315 if (zero) blank=code; // We know this tile is blank now\r
316 }\r
317\r
318 // terminate the cache list\r
319 *ts->hc = 0;\r
320}\r
321#endif\r
322\r
323// this is messy\r
324#ifndef _ASM_DRAW_C\r
325static\r
326#endif\r
327void DrawStripVSRam(struct TileStrip *ts, int plane)\r
328{\r
329 int tilex=0,dx=0,ty=0,code=0,addr=0,cell=0,nametabadd=0;\r
330 int oldcode=-1,blank=-1; // The tile we know is blank\r
331 int pal=0,scan=Scanline;\r
332\r
333 // Draw tiles across screen:\r
334 tilex=(-ts->hscroll)>>3;\r
335 dx=((ts->hscroll-1)&7)+1;\r
336 if(dx != 8) {\r
337 int vscroll, line;\r
338 cell--; // have hscroll, start with negative cell\r
339 // also calculate intial VS stuff\r
340 vscroll=Pico.vsram[plane];\r
341\r
342 // Find the line in the name table\r
343 line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..\r
344 nametabadd=(line>>3)<<(ts->line>>24); // .. and shift[width]\r
345 ty=(line&7)<<1; // Y-Offset into tile\r
346 }\r
347\r
348 for (; cell < ts->cells; dx+=8,tilex++,cell++)\r
349 {\r
350 int zero=0;\r
351\r
352 if((cell&1)==0) {\r
353 int line,vscroll;\r
354 vscroll=Pico.vsram[plane+(cell&~1)];\r
355\r
356 // Find the line in the name table\r
357 line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..\r
358 nametabadd=(line>>3)<<(ts->line>>24); // .. and shift[width]\r
359 ty=(line&7)<<1; // Y-Offset into tile\r
360 }\r
361\r
362 code=Pico.vram[ts->nametab+nametabadd+(tilex&ts->xmask)];\r
363 if (code==blank) continue;\r
364 if (code>>15) { // high priority tile\r
365 int cval = code | (dx<<16) | (ty<<25);\r
366 if(code&0x1000) cval^=7<<26;\r
367 *ts->hc++ = cval; // cache it\r
368 continue;\r
369 }\r
370\r
371 if (code!=oldcode) {\r
372 oldcode = code;\r
373 // Get tile address/2:\r
374 addr=(code&0x7ff)<<4;\r
375 if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip\r
376\r
377// pal=Pico.cram+((code>>9)&0x30);\r
378 pal=((code>>9)&0x30);\r
379 }\r
380\r
381 if (code&0x0800) zero=TileFlip(dx,addr,pal);\r
382 else zero=TileNorm(dx,addr,pal);\r
383\r
384 if (zero) blank=code; // We know this tile is blank now\r
385 }\r
386\r
387 // terminate the cache list\r
388 *ts->hc = 0;\r
389}\r
390\r
391#ifndef _ASM_DRAW_C\r
392static\r
393#endif\r
394void DrawStripInterlace(struct TileStrip *ts)\r
395{\r
396 int tilex=0,dx=0,ty=0,code=0,addr=0,cells;\r
397 int oldcode=-1,blank=-1; // The tile we know is blank\r
398 int pal=0;\r
399\r
400 // Draw tiles across screen:\r
401 tilex=(-ts->hscroll)>>3;\r
402 ty=(ts->line&15)<<1; // Y-Offset into tile\r
403 dx=((ts->hscroll-1)&7)+1;\r
404 cells = ts->cells;\r
405 if(dx != 8) cells++; // have hscroll, need to draw 1 cell more\r
406\r
407 for (; cells; dx+=8,tilex++,cells--)\r
408 {\r
409 int zero=0;\r
410\r
411 code=Pico.vram[ts->nametab+(tilex&ts->xmask)];\r
412 if (code==blank) continue;\r
413 if (code>>15) { // high priority tile\r
414 int cval = (code&0xfc00) | (dx<<16) | (ty<<25);\r
415 cval|=(code&0x3ff)<<1;\r
416 if(code&0x1000) cval^=0xf<<26;\r
417 *ts->hc++ = cval; // cache it\r
418 continue;\r
419 }\r
420\r
421 if (code!=oldcode) {\r
422 oldcode = code;\r
423 // Get tile address/2:\r
424 addr=(code&0x7ff)<<5;\r
425 if (code&0x1000) addr+=30-ty; else addr+=ty; // Y-flip\r
426\r
427// pal=Pico.cram+((code>>9)&0x30);\r
428 pal=((code>>9)&0x30);\r
429 }\r
430\r
431 if (code&0x0800) zero=TileFlip(dx,addr,pal);\r
432 else zero=TileNorm(dx,addr,pal);\r
433\r
434 if (zero) blank=code; // We know this tile is blank now\r
435 }\r
436\r
437 // terminate the cache list\r
438 *ts->hc = 0;\r
439}\r
440\r
441// --------------------------------------------\r
442\r
443#ifndef _ASM_DRAW_C\r
444static void DrawLayer(int plane, int *hcache, int maxcells, int sh)\r
445{\r
446 struct PicoVideo *pvid=&Pico.video;\r
447 const char shift[4]={5,6,5,7}; // 32,64 or 128 sized tilemaps (2 is invalid)\r
448 struct TileStrip ts;\r
449 int width, height, ymask;\r
450 int vscroll, htab;\r
451\r
452 ts.hc=hcache;\r
453 ts.cells=maxcells;\r
454\r
455 // Work out the TileStrip to draw\r
456\r
457 // Work out the name table size: 32 64 or 128 tiles (0-3)\r
458 width=pvid->reg[16];\r
459 height=(width>>4)&3; width&=3;\r
460\r
461 ts.xmask=(1<<shift[width])-1; // X Mask in tiles (0x1f-0x7f)\r
462 ymask=(height<<8)|0xff; // Y Mask in pixels\r
463 if(width == 1) ymask&=0x1ff;\r
464 else if(width>1) ymask =0x0ff;\r
465\r
466 // Find name table:\r
467 if (plane==0) ts.nametab=(pvid->reg[2]&0x38)<< 9; // A\r
468 else ts.nametab=(pvid->reg[4]&0x07)<<12; // B\r
469\r
470 htab=pvid->reg[13]<<9; // Horizontal scroll table address\r
471 if ( pvid->reg[11]&2) htab+=Scanline<<1; // Offset by line\r
472 if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile\r
473 htab+=plane; // A or B\r
474\r
475 // Get horizontal scroll value, will be masked later\r
476 ts.hscroll=Pico.vram[htab&0x7fff];\r
477\r
478 if((pvid->reg[12]&6) == 6) {\r
479 // interlace mode 2\r
480 vscroll=Pico.vsram[plane]; // Get vertical scroll value\r
481\r
482 // Find the line in the name table\r
483 ts.line=(vscroll+(Scanline<<1))&((ymask<<1)|1);\r
484 ts.nametab+=(ts.line>>4)<<shift[width];\r
485\r
486 DrawStripInterlace(&ts);\r
487 } else if( pvid->reg[11]&4) {\r
488 // shit, we have 2-cell column based vscroll\r
489 // luckily this doesn't happen too often\r
490 ts.line=ymask|(shift[width]<<24); // save some stuff instead of line\r
491 DrawStripVSRam(&ts, plane);\r
492 } else {\r
493 vscroll=Pico.vsram[plane]; // Get vertical scroll value\r
494\r
495 // Find the line in the name table\r
496 ts.line=(vscroll+Scanline)&ymask;\r
497 ts.nametab+=(ts.line>>3)<<shift[width];\r
498\r
499 DrawStrip(&ts, sh);\r
500 }\r
501}\r
502\r
503\r
504// --------------------------------------------\r
505\r
506// tstart & tend are tile pair numbers\r
507static void DrawWindow(int tstart, int tend, int prio, int sh) // int *hcache\r
508{\r
509 struct PicoVideo *pvid=&Pico.video;\r
510 int tilex=0,ty=0,nametab,code=0;\r
511 int blank=-1; // The tile we know is blank\r
512\r
513 // Find name table line:\r
514 if (pvid->reg[12]&1)\r
515 {\r
516 nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode\r
517 nametab+=(Scanline>>3)<<6;\r
518 }\r
519 else\r
520 {\r
521 nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode\r
522 nametab+=(Scanline>>3)<<5;\r
523 }\r
524\r
525 tilex=tstart<<1;\r
526 tend<<=1;\r
527\r
528 ty=(Scanline&7)<<1; // Y-Offset into tile\r
529\r
530 if(!(rendstatus&2)) {\r
531 // check the first tile code\r
532 code=Pico.vram[nametab+tilex];\r
533 // if the whole window uses same priority (what is often the case), we may be able to skip this field\r
534 if((code>>15) != prio) return;\r
535 }\r
536\r
537 // Draw tiles across screen:\r
538 for (; tilex < tend; tilex++)\r
539 {\r
540 int addr=0,zero=0;\r
541 int pal;\r
542\r
543 code=Pico.vram[nametab+tilex];\r
544 if(code==blank) continue;\r
545 if((code>>15) != prio) {\r
546 rendstatus|=2;\r
547 continue;\r
548 }\r
549\r
550 pal=((code>>9)&0x30);\r
551\r
552 if(sh) {\r
553 int tmp, *zb = (int *)(DrawLineInt+8+(tilex<<3));\r
554 if(prio) {\r
555 tmp = *zb;\r
556 if(!(tmp&0x00000080)) tmp&=~0x000000c0; if(!(tmp&0x00008000)) tmp&=~0x0000c000;\r
557 if(!(tmp&0x00800000)) tmp&=~0x00c00000; if(!(tmp&0x80000000)) tmp&=~0xc0000000;\r
558 *zb++=tmp; tmp = *zb;\r
559 if(!(tmp&0x00000080)) tmp&=~0x000000c0; if(!(tmp&0x00008000)) tmp&=~0x0000c000;\r
560 if(!(tmp&0x00800000)) tmp&=~0x00c00000; if(!(tmp&0x80000000)) tmp&=~0xc0000000;\r
561 *zb++=tmp;\r
562 } else {\r
563 pal |= 0x40;\r
564 }\r
565 }\r
566\r
567 // Get tile address/2:\r
568 addr=(code&0x7ff)<<4;\r
569 if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip\r
570\r
571 if (code&0x0800) zero=TileFlip(8+(tilex<<3),addr,pal);\r
572 else zero=TileNorm(8+(tilex<<3),addr,pal);\r
573\r
574 if (zero) blank=code; // We know this tile is blank now\r
575 }\r
576\r
577 // terminate the cache list\r
578 //*hcache = 0;\r
579}\r
580\r
581// --------------------------------------------\r
582\r
583static void DrawTilesFromCache(int *hc, int sh)\r
584{\r
585 int code, addr, zero, dx;\r
586 int pal;\r
587 short blank=-1; // The tile we know is blank\r
588\r
589 // *ts->hc++ = code | (dx<<16) | (ty<<25); // cache it\r
590\r
591 while((code=*hc++)) {\r
592 if(!sh && (short)code == blank) continue;\r
593\r
594 // Get tile address/2:\r
595 addr=(code&0x7ff)<<4;\r
596 addr+=(unsigned int)code>>25; // y offset into tile\r
597 dx=(code>>16)&0x1ff;\r
598 if(sh) {\r
599 unsigned char *zb = DrawLineInt+dx;\r
600 if(!(*zb&0x80)) *zb&=0x3f; zb++; if(!(*zb&0x80)) *zb&=0x3f; zb++;\r
601 if(!(*zb&0x80)) *zb&=0x3f; zb++; if(!(*zb&0x80)) *zb&=0x3f; zb++;\r
602 if(!(*zb&0x80)) *zb&=0x3f; zb++; if(!(*zb&0x80)) *zb&=0x3f; zb++;\r
603 if(!(*zb&0x80)) *zb&=0x3f; zb++; if(!(*zb&0x80)) *zb&=0x3f; zb++;\r
604 }\r
605\r
606 pal=((code>>9)&0x30);\r
607\r
608 if (code&0x0800) zero=TileFlip(dx,addr,pal);\r
609 else zero=TileNorm(dx,addr,pal);\r
610\r
611 if(zero) blank=(short)code;\r
612 }\r
613}\r
614\r
615// --------------------------------------------\r
616\r
617// Index + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size\r
618// Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8\r
619\r
620static void DrawSprite(int *sprite, int **hc, int sh)\r
621{\r
622 int width=0,height=0;\r
623 int row=0,code=0;\r
624 int pal;\r
625 int tile=0,delta=0;\r
626 int sx, sy;\r
627 int (*fTileFunc)(int sx,int addr,int pal);\r
628\r
629 // parse the sprite data\r
630 sy=sprite[0];\r
631 code=sprite[1];\r
632 sx=code>>16; // X\r
633 width=sy>>28;\r
634 height=(sy>>24)&7; // Width and height in tiles\r
635 sy=(sy<<16)>>16; // Y\r
636\r
637 row=Scanline-sy; // Row of the sprite we are on\r
638\r
639 if (code&0x1000) row=(height<<3)-1-row; // Flip Y\r
640\r
641 tile=code&0x7ff; // Tile number\r
642 tile+=row>>3; // Tile number increases going down\r
643 delta=height; // Delta to increase tile by going right\r
644 if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X\r
645\r
646 tile<<=4; tile+=(row&7)<<1; // Tile address\r
647\r
648 if(code&0x8000) { // high priority - cache it\r
649 *(*hc)++ = (tile<<16)|((code&0x0800)<<5)|((sx<<6)&0x0000ffc0)|((code>>9)&0x30)|((sprite[0]>>16)&0xf);\r
650 } else {\r
651 delta<<=4; // Delta of address\r
652 pal=((code>>9)&0x30)|(sh<<6);\r
653\r
654 if(sh && (code&0x6000) == 0x6000) {\r
655 if(code&0x0800) fTileFunc=TileFlipSH;\r
656 else fTileFunc=TileNormSH;\r
657 } else {\r
658 if(code&0x0800) fTileFunc=TileFlip;\r
659 else fTileFunc=TileNorm;\r
660 }\r
661\r
662 for (; width; width--,sx+=8,tile+=delta)\r
663 {\r
664 if(sx<=0) continue;\r
665 if(sx>=328) break; // Offscreen\r
666\r
667 tile&=0x7fff; // Clip tile address\r
668 fTileFunc(sx,tile,pal);\r
669 }\r
670 }\r
671}\r
672#endif\r
673\r
674\r
675// Index + 0 : hhhhvvvv s---hhvv yyyyyyyy yyyyyyyy // s: skip flag, h: horiz. size\r
676// Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8\r
677\r
678static void DrawSpriteZ(int pack, int pack2, int shpri, int sprio)\r
679{\r
680 int width=0,height=0;\r
681 int row=0;\r
682 int pal;\r
683 int tile=0,delta=0;\r
684 int sx, sy;\r
685 int (*fTileFunc)(int sx,int addr,int pal,int zval);\r
686\r
687 // parse the sprite data\r
688 sx=pack2>>16; // X\r
689 sy=(pack <<16)>>16; // Y\r
690 width=pack>>28;\r
691 height=(pack>>24)&7; // Width and height in tiles\r
692\r
693 row=Scanline-sy; // Row of the sprite we are on\r
694\r
695 if (pack2&0x1000) row=(height<<3)-1-row; // Flip Y\r
696\r
697 tile=pack2&0x7ff; // Tile number\r
698 tile+=row>>3; // Tile number increases going down\r
699 delta=height; // Delta to increase tile by going right\r
700 if (pack2&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X\r
701\r
702 tile<<=4; tile+=(row&7)<<1; // Tile address\r
703 delta<<=4; // Delta of address\r
704 pal=((pack2>>9)&0x30);\r
705 if((shpri&1)&&!(shpri&2)) pal|=0x40;\r
706\r
707 shpri&=1;\r
708 if((pack2&0x6000) != 0x6000) shpri = 0;\r
709 shpri |= (pack2&0x0800)>>10;\r
710 switch(shpri) {\r
711 default:\r
712 case 0: fTileFunc=TileNormZ; break;\r
713 case 1: fTileFunc=TileNormZSH; break;\r
714 case 2: fTileFunc=TileFlipZ; break;\r
715 case 3: fTileFunc=TileFlipZSH; break;\r
716 }\r
717\r
718 for (; width; width--,sx+=8,tile+=delta)\r
719 {\r
720 if(sx<=0) continue;\r
721 if(sx>=328) break; // Offscreen\r
722\r
723 tile&=0x7fff; // Clip tile address\r
724 fTileFunc(sx,tile,pal,sprio);\r
725 }\r
726}\r
727\r
728static void DrawSpriteInterlace(unsigned int *sprite)\r
729{\r
730 int width=0,height=0;\r
731 int row=0,code=0;\r
732 int pal;\r
733 int tile=0,delta=0;\r
734 int sx, sy;\r
735\r
736 // parse the sprite data\r
737 sy=sprite[0];\r
738 height=sy>>24;\r
739 sy=(sy&0x3ff)-0x100; // Y\r
740 width=(height>>2)&3; height&=3;\r
741 width++; height++; // Width and height in tiles\r
742\r
743 row=(Scanline<<1)-sy; // Row of the sprite we are on\r
744\r
745 code=sprite[1];\r
746 sx=((code>>16)&0x1ff)-0x78; // X\r
747\r
748 if (code&0x1000) row^=(16<<height)-1; // Flip Y\r
749\r
750 tile=code&0x3ff; // Tile number\r
751 tile+=row>>4; // Tile number increases going down\r
752 delta=height; // Delta to increase tile by going right\r
753 if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X\r
754\r
755 tile<<=5; tile+=(row&15)<<1; // Tile address\r
756\r
757 delta<<=5; // Delta of address\r
758 pal=((code>>9)&0x30); // Get palette pointer\r
759\r
760 for (; width; width--,sx+=8,tile+=delta)\r
761 {\r
762 if(sx<=0) continue;\r
763 if(sx>=328) break; // Offscreen\r
764\r
765 tile&=0x7fff; // Clip tile address\r
766 if (code&0x0800) TileFlip(sx,tile,pal);\r
767 else TileNorm(sx,tile,pal);\r
768 }\r
769}\r
770\r
771\r
772static void DrawAllSpritesInterlace(int pri, int maxwidth)\r
773{\r
774 struct PicoVideo *pvid=&Pico.video;\r
775 int i,u,table,link=0,sline=Scanline<<1;\r
776 unsigned int *sprites[80]; // Sprite index\r
777\r
778 table=pvid->reg[5]&0x7f;\r
779 if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r
780 table<<=8; // Get sprite table address/2\r
781\r
782 for (i=u=0; u < 80 && i < 21; u++)\r
783 {\r
784 unsigned int *sprite;\r
785 int code, sx, sy, height;\r
786\r
787 sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r
788\r
789 // get sprite info\r
790 code = sprite[0];\r
791 sx = sprite[1];\r
792 if(((sx>>15)&1) != pri) goto nextsprite; // wrong priority sprite\r
793\r
794 // check if it is on this line\r
795 sy = (code&0x3ff)-0x100;\r
796 height = (((code>>24)&3)+1)<<4;\r
797 if(sline < sy || sline >= sy+height) goto nextsprite; // no\r
798\r
799 // check if sprite is not hidden offscreen\r
800 sx = (sx>>16)&0x1ff;\r
801 sx -= 0x78; // Get X coordinate + 8\r
802 if(sx <= -8*3 || sx >= maxwidth) goto nextsprite;\r
803\r
804 // sprite is good, save it's pointer\r
805 sprites[i++]=sprite;\r
806\r
807 nextsprite:\r
808 // Find next sprite\r
809 link=(code>>16)&0x7f;\r
810 if(!link) break; // End of sprites\r
811 }\r
812\r
813 // Go through sprites backwards:\r
814 for (i-- ;i>=0; i--)\r
815 DrawSpriteInterlace(sprites[i]);\r
816}\r
817\r
818\r
819#ifndef _ASM_DRAW_C\r
820static void DrawSpritesFromCache(int *hc, int sh)\r
821{\r
822 int code, tile, sx, delta, width;\r
823 int pal;\r
824 int (*fTileFunc)(int sx,int addr,int pal);\r
825\r
826 // *(*hc)++ = (tile<<16)|((code&0x0800)<<5)|((sx<<6)&0x0000ffc0)|((code>>9)&0x30)|((sprite[0]>>24)&0xf);\r
827\r
828 while((code=*hc++)) {\r
829 pal=(code&0x30);\r
830 delta=code&0xf;\r
831 width=delta>>2; delta&=3;\r
832 width++; delta++; // Width and height in tiles\r
833 if (code&0x10000) delta=-delta; // Flip X\r
834 delta<<=4;\r
835 tile=((unsigned int)code>>17)<<1;\r
836 sx=(code<<16)>>22; // sx can be negative (start offscreen), so sign extend\r
837\r
838 if(sh && pal == 0x30) { //\r
839 if(code&0x10000) fTileFunc=TileFlipSH;\r
840 else fTileFunc=TileNormSH;\r
841 } else {\r
842 if(code&0x10000) fTileFunc=TileFlip;\r
843 else fTileFunc=TileNorm;\r
844 }\r
845\r
846 for (; width; width--,sx+=8,tile+=delta)\r
847 {\r
848 if(sx<=0) continue;\r
849 if(sx>=328) break; // Offscreen\r
850\r
851 tile&=0x7fff; // Clip tile address\r
852 fTileFunc(sx,tile,pal);\r
853 }\r
854 }\r
855}\r
856#endif\r
857\r
858\r
859// Index + 0 : ----hhvv -lllllll -------y yyyyyyyy\r
860// Index + 4 : -------x xxxxxxxx pccvhnnn nnnnnnnn\r
861// v\r
862// Index + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size\r
863// Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8\r
864\r
865static void PrepareSprites(int full)\r
866{\r
867 struct PicoVideo *pvid=&Pico.video;\r
868 int u=0,link=0,sblocks=0;\r
869 int table=0;\r
870 int *pd = HighPreSpr;\r
871\r
872 table=pvid->reg[5]&0x7f;\r
873 if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r
874 table<<=8; // Get sprite table address/2\r
875\r
876 if (!full)\r
877 {\r
878 int pack;\r
879 // updates: tilecode, sx\r
880 for (u=0; u < 80 && (pack = *pd); u++, pd+=2)\r
881 {\r
882 unsigned int *sprite;\r
883 int code, code2, sx, sy, skip=0;\r
884\r
885 sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r
886\r
887 // parse sprite info\r
888 code = sprite[0];\r
889 code2 = sprite[1];\r
890 code2 &= ~0xfe000000;\r
891 code2 -= 0x00780000; // Get X coordinate + 8 in upper 16 bits\r
892 sx = code2>>16;\r
893\r
894 if((sx <= 8-((pack>>28)<<3) && sx >= -0x76) || sx >= 328) skip=1<<23;\r
895 else if ((sy = (pack<<16)>>16) < 240 && sy > -32) {\r
896 int sbl = (2<<(pack>>28))-1;\r
897 sblocks |= sbl<<(sy>>3);\r
898 }\r
899\r
900 *pd = (pack&~(1<<23))|skip;\r
901 *(pd+1) = code2;\r
902\r
903 // Find next sprite\r
904 link=(code>>16)&0x7f;\r
905 if(!link) break; // End of sprites\r
906 }\r
907 SpriteBlocks |= sblocks;\r
908 }\r
909 else\r
910 {\r
911 for (; u < 80; u++)\r
912 {\r
913 unsigned int *sprite;\r
914 int code, code2, sx, sy, hv, height, width, skip=0, sx_min;\r
915\r
916 sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r
917\r
918 // parse sprite info\r
919 code = sprite[0];\r
920 sy = (code&0x1ff)-0x80;\r
921 hv = (code>>24)&0xf;\r
922 height = (hv&3)+1;\r
923\r
924 if(sy > 240 || sy + (height<<3) <= 0) skip|=1<<22;\r
925 \r
926 width = (hv>>2)+1;\r
927 code2 = sprite[1];\r
928 sx = (code2>>16)&0x1ff;\r
929 sx -= 0x78; // Get X coordinate + 8\r
930 sx_min = 8-(width<<3);\r
931 \r
932 if((sx <= sx_min && sx >= -0x76) || sx >= 328) skip|=1<<23;\r
933 else if (sx > sx_min && !skip) {\r
934 int sbl = (2<<height)-1;\r
935 int shi = sy>>3;\r
936 if(shi < 0) shi=0; // negative sy\r
937 sblocks |= sbl<<shi;\r
938 }\r
939 \r
940 *pd++ = (width<<28)|(height<<24)|skip|(hv<<16)|((unsigned short)sy);\r
941 *pd++ = (sx<<16)|((unsigned short)code2);\r
942 \r
943 // Find next sprite\r
944 link=(code>>16)&0x7f;\r
945 if(!link) break; // End of sprites\r
946 }\r
947 SpriteBlocks = sblocks;\r
948 *pd = 0; // terminate\r
949 }\r
950}\r
951\r
952static void DrawAllSprites(int *hcache, int maxwidth, int prio, int sh)\r
953{\r
954 int i,u,n;\r
955 int sx1seen=0; // sprite with x coord 1 or 0 seen\r
956 int ntiles = 0; // tile counter for sprite limit emulation\r
957 int *sprites[40]; // Sprites to draw in fast mode\r
958 int *ps, pack, rs = rendstatus, scan=Scanline;\r
959\r
960 if(rs&8) {\r
961 DrawAllSpritesInterlace(prio, maxwidth);\r
962 return;\r
963 }\r
964 if(rs&0x11) {\r
965 //dprintf("PrepareSprites(%i) [%i]", (rs>>4)&1, scan);\r
966 PrepareSprites(rs&0x10);\r
967 rendstatus=rs&~0x11;\r
968 }\r
969 if (!(SpriteBlocks & (1<<(scan>>3)))) return;\r
970\r
971 if(((rs&4)||sh)&&prio==0)\r
972 memset(HighSprZ, 0, 328);\r
973 if(!(rs&4)&&prio) {\r
974 if(hcache[0]) DrawSpritesFromCache(hcache, sh);\r
975 return;\r
976 }\r
977\r
978 ps = HighPreSpr;\r
979\r
980 // Index + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size\r
981 // Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8\r
982\r
983 for(i=u=n=0; (pack = *ps) && n < 20; ps+=2, u++)\r
984 {\r
985 int sx, sy, row, pack2;\r
986\r
987 if(pack & 0x00400000) continue;\r
988\r
989 // get sprite info\r
990 pack2 = *(ps+1);\r
991 sx = pack2>>16;\r
992 sy = (pack <<16)>>16;\r
993 row = scan-sy;\r
994\r
995 //dprintf("x: %i y: %i %ix%i", sx, sy, (pack>>28)<<3, (pack>>21)&0x38);\r
996\r
997 if(sx == -0x77) sx1seen|=1; // for masking mode 2\r
998\r
999 // check if it is on this line\r
1000 if(row < 0 || row >= ((pack>>21)&0x38)) continue; // no\r
1001 n++; // number of sprites on this line (both visible and hidden, max is 20) [broken]\r
1002\r
1003 // sprite limit\r
1004 ntiles += pack>>28;\r
1005 if(ntiles > 40) break;\r
1006\r
1007 if(pack & 0x00800000) continue;\r
1008\r
1009 // masking sprite?\r
1010 if(sx == -0x78) {\r
1011 if(!(sx1seen&1) || sx1seen==3) {\r
1012 break; // this sprite is not drawn and remaining sprites are masked\r
1013 }\r
1014 if((sx1seen>>8) == 0) sx1seen=(i+1)<<8;\r
1015 continue;\r
1016 }\r
1017 else if(sx == -0x77) {\r
1018 // masking mode2 (Outrun, Galaxy Force II, Shadow of the beast)\r
1019 if(sx1seen>>8) { i=(sx1seen>>8)-1; break; } // seen both 0 and 1\r
1020 sx1seen |= 2;\r
1021 continue;\r
1022 }\r
1023\r
1024 // accurate sprites\r
1025 //dprintf("P:%i",((sx>>15)&1));\r
1026 if(rs&4) {\r
1027 // might need to skip this sprite\r
1028 if((pack2&0x8000) ^ (prio<<15)) continue;\r
1029 DrawSpriteZ(pack,pack2,sh|(prio<<1),(char)(0x1f-n));\r
1030 continue;\r
1031 }\r
1032\r
1033 // sprite is good, save it's pointer\r
1034 sprites[i++]=ps;\r
1035 }\r
1036\r
1037 // Go through sprites backwards:\r
1038 if(!(rs&4)) {\r
1039 for (i--; i>=0; i--)\r
1040 DrawSprite(sprites[i],&hcache,sh);\r
1041\r
1042 // terminate cache list\r
1043 *hcache = 0;\r
1044 }\r
1045}\r
1046\r
1047\r
1048// --------------------------------------------\r
1049\r
1050#ifndef _ASM_DRAW_C\r
1051static void BackFill(int reg7, int sh)\r
1052{\r
1053 unsigned int back=0;\r
1054 unsigned int *pd=NULL,*end=NULL;\r
1055\r
1056 // Start with a blank scanline (background colour):\r
1057 back=reg7&0x3f;\r
1058 back|=sh<<6;\r
1059 back|=back<<8;\r
1060 back|=back<<16;\r
1061\r
1062 pd= (unsigned int *)(DrawLineInt+8);\r
1063 end=(unsigned int *)(DrawLineInt+8+320);\r
1064\r
1065 do { pd[0]=pd[1]=pd[2]=pd[3]=back; pd+=4; } while (pd<end);\r
1066}\r
1067#endif\r
1068\r
1069// --------------------------------------------\r
1070\r
1071unsigned short HighPal[0x100];\r
1072\r
1073#ifndef _ASM_DRAW_C\r
1074static void FinalizeLineBGR444(int sh)\r
1075{\r
1076 unsigned short *pd=DrawLineDest;\r
1077 unsigned char *ps=DrawLineInt+8;\r
1078 unsigned short *pal=Pico.cram;\r
1079 int len, i, t;\r
1080\r
1081 if (Pico.video.reg[12]&1) {\r
1082 len = 320;\r
1083 } else {\r
1084 if(!(PicoOpt&0x100)) pd+=32;\r
1085 len = 256;\r
1086 }\r
1087\r
1088 if(sh) {\r
1089 pal=HighPal;\r
1090 if(Pico.m.dirtyPal) {\r
1091 blockcpy(pal, Pico.cram, 0x40*2);\r
1092 // shadowed pixels\r
1093 for(i = 0x3f; i >= 0; i--)\r
1094 pal[0x40|i] = pal[0xc0|i] = (unsigned short)((pal[i]>>1)&0x0777);\r
1095 // hilighted pixels\r
1096 for(i = 0x3f; i >= 0; i--) {\r
1097 t=pal[i]&0xeee;t+=0x444;if(t&0x10)t|=0xe;if(t&0x100)t|=0xe0;if(t&0x1000)t|=0xe00;t&=0xeee;\r
1098 pal[0x80|i]=(unsigned short)t;\r
1099 }\r
1100 Pico.m.dirtyPal = 0;\r
1101 }\r
1102 }\r
1103\r
1104 for(i = 0; i < len; i++)\r
1105 pd[i] = pal[ps[i]];\r
1106}\r
1107\r
1108\r
1109static void FinalizeLineRGB555(int sh)\r
1110{\r
1111 unsigned short *pd=DrawLineDest;\r
1112 unsigned char *ps=DrawLineInt+8;\r
1113 unsigned short *pal=HighPal;\r
1114 int len, i, t, dirtyPal = Pico.m.dirtyPal;\r
1115\r
1116 if(dirtyPal) {\r
1117 unsigned short *ppal=Pico.cram;\r
1118 for(i = 0x3f; i >= 0; i--)\r
1119 pal[i] = (unsigned short) (((ppal[i]&0x00f)<<12)|((ppal[i]&0x0f0)<<3)|((ppal[i]&0xf00)>>7));\r
1120 Pico.m.dirtyPal = 0;\r
1121 }\r
1122\r
1123 if (Pico.video.reg[12]&1) {\r
1124 len = 320;\r
1125 } else {\r
1126 if(!(PicoOpt&0x100)) pd+=32;\r
1127 len = 256;\r
1128 }\r
1129\r
1130 if(sh) {\r
1131 if(dirtyPal) {\r
1132 // shadowed pixels\r
1133 for(i = 0x3f; i >= 0; i--)\r
1134 pal[0x40|i] = pal[0xc0|i] = (unsigned short)((pal[i]>>1)&0x738e);\r
1135 // hilighted pixels\r
1136 for(i = 0x3f; i >= 0; i--) {\r
1137 t=pal[i]&0xe71c;t+=0x4208;if(t&0x20)t|=0x1c;if(t&0x800)t|=0x700;if(t&0x10000)t|=0xe000;t&=0xe71c;\r
1138 pal[0x80|i]=(unsigned short)t;\r
1139 }\r
1140 }\r
1141 }\r
1142\r
1143 for(i = 0; i < len; i++)\r
1144 pd[i] = pal[ps[i]];\r
1145}\r
1146#endif\r
1147\r
1148static void FinalizeLine8bit(int sh)\r
1149{\r
1150 unsigned char *pd=DrawLineDest;\r
1151 int len, rs = rendstatus;\r
1152 static int dirty_count;\r
1153\r
1154 if (!sh && Pico.m.dirtyPal && Scanline < 222) {\r
1155 // a hack for mid-frame palette changes\r
1156 if (!(rs & 0x20))\r
1157 dirty_count = 1;\r
1158 else dirty_count++;\r
1159 rs |= 0x20;\r
1160 rendstatus = rs;\r
1161 if (dirty_count == 3) {\r
1162 blockcpy(HighPal, Pico.cram, 0x40*2);\r
1163 } else if (dirty_count == 11) {\r
1164 blockcpy(HighPal+0x40, Pico.cram, 0x40*2);\r
1165 }\r
1166 }\r
1167\r
1168 if (Pico.video.reg[12]&1) {\r
1169 len = 320;\r
1170 } else {\r
1171 if(!(PicoOpt&0x100)) pd+=32;\r
1172 len = 256;\r
1173 }\r
1174\r
1175/* test\r
1176 if (!sh && rs & 0x20) {\r
1177 if (dirty_count >= 11) {\r
1178 blockcpy_or(pd, HighCol+8, len, 0x80);\r
1179 } else {\r
1180 blockcpy_or(pd, HighCol+8, len, 0x40);\r
1181 }\r
1182 } else {\r
1183 blockcpy(pd, HighCol+8, len);\r
1184 }\r
1185*/\r
1186}\r
1187\r
1188void (*FinalizeLine)(int sh) = FinalizeLineBGR444;\r
1189\r
1190// --------------------------------------------\r
1191\r
1192static int DrawDisplay(int sh)\r
1193{\r
1194 struct PicoVideo *pvid=&Pico.video;\r
1195 int win=0,edge=0,hvwind=0;\r
1196 int maxw, maxcells;\r
1197\r
1198 if(pvid->reg[12]&1) {\r
1199 maxw = 328; maxcells = 40;\r
1200 } else {\r
1201 maxw = 264; maxcells = 32;\r
1202 }\r
1203\r
1204 // Find out if the window is on this line:\r
1205 win=pvid->reg[0x12];\r
1206 edge=(win&0x1f)<<3;\r
1207\r
1208 if (win&0x80) { if (Scanline>=edge) hvwind=1; }\r
1209 else { if (Scanline< edge) hvwind=1; }\r
1210\r
1211 if(!hvwind) { // we might have a vertical window here \r
1212 win=pvid->reg[0x11];\r
1213 edge=win&0x1f;\r
1214 if(win&0x80) {\r
1215 if(!edge) hvwind=1;\r
1216 else if(edge < (maxcells>>1)) hvwind=2;\r
1217 } else {\r
1218 if(!edge);\r
1219 else if(edge < (maxcells>>1)) hvwind=2;\r
1220 else hvwind=1;\r
1221 }\r
1222 }\r
1223\r
1224 DrawLayer(1, HighCacheB, maxcells, sh);\r
1225 if(hvwind == 1)\r
1226 DrawWindow(0, maxcells>>1, 0, sh); // HighCacheAW\r
1227 else if(hvwind == 2) {\r
1228 // ahh, we have vertical window\r
1229 DrawLayer(0, HighCacheA, (win&0x80) ? edge<<1 : maxcells, sh);\r
1230 DrawWindow((win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 0, sh); // HighCacheW\r
1231 } else\r
1232 DrawLayer(0, HighCacheA, maxcells, sh);\r
1233 DrawAllSprites(HighCacheS, maxw, 0, sh);\r
1234\r
1235 if(HighCacheB[0]) DrawTilesFromCache(HighCacheB, sh);\r
1236 if(hvwind == 1)\r
1237 DrawWindow(0, maxcells>>1, 1, sh);\r
1238 else if(hvwind == 2) {\r
1239 if(HighCacheA[0]) DrawTilesFromCache(HighCacheA, sh);\r
1240 DrawWindow((win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 1, sh);\r
1241 } else\r
1242 if(HighCacheA[0]) DrawTilesFromCache(HighCacheA, sh);\r
1243 DrawAllSprites(HighCacheS, maxw, 1, sh);\r
1244\r
1245 return 0;\r
1246}\r
1247\r
1248\r
1249void PicoFrameStart()\r
1250{\r
1251 // prepare to do this frame\r
1252 rendstatus &= 0x40;\r
1253 rendstatus |= (PicoOpt&0x80)>>5; // accurate sprites\r
1254 if(rendstatus)\r
1255 Pico.video.status &= ~0x0020;\r
1256 else Pico.video.status |= 0x0020; // sprite collision\r
1257 if((Pico.video.reg[12]&6) == 6) rendstatus |= 8; // interlace mode\r
1258\r
1259 PrepareSprites(1);\r
1260}\r
1261\r
1262static int Skip=0;\r
1263\r
1264int PicoLine(int scan)\r
1265{\r
1266 int sh;\r
1267 if (Skip>0) { Skip--; return 0; } // Skip rendering lines\r
1268\r
1269 if(!(rendstatus&0x40))\r
1270 DrawLineInt = DrawLineDest;\r
1271\r
1272 Scanline=scan;\r
1273 sh=(Pico.video.reg[0xC]&8)>>3; // shadow/hilight?\r
1274\r
1275 // Draw screen:\r
1276 BackFill(Pico.video.reg[7], sh);\r
1277 if (Pico.video.reg[1]&0x40)\r
1278 DrawDisplay(sh);\r
1279\r
1280 FinalizeLine(sh);\r
1281 //if (SpriteBlocks & (1<<(scan>>3))) for (sh=0; sh < 30; sh++) DrawLineDest[sh] = 0xf;\r
1282\r
1283 Skip=PicoScan(Scanline,DrawLineDest);\r
1284\r
1285 return 0;\r
1286}\r
1287\r
1288\r
1289void DrawSetColorFormat(int which)\r
1290{\r
1291 rendstatus |= 0x40;\r
1292 DrawLineInt = HighCol;\r
1293\r
1294 if (which == 2) {\r
1295 rendstatus &= ~0x40;\r
1296 FinalizeLine = FinalizeLine8bit;\r
1297 } else if (which == 1)\r
1298 FinalizeLine = FinalizeLineRGB555;\r
1299 else\r
1300 FinalizeLine = FinalizeLineBGR444;\r
1301}\r