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clarify PicoDrive's license
[picodrive.git] / pico / draw2.c
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cff531af 1/*\r
2 * tile renderer\r
3 * (C) notaz, 2006-2008\r
4 *\r
5 * This work is licensed under the terms of MAME license.\r
6 * See COPYING file in the top-level directory.\r
7 */\r
cc68a136 8\r
efcba75f 9#include "pico_int.h"\r
cc68a136 10\r
11// port_config.h include must define these 2 defines:\r
12// #define START_ROW 1 // which row of tiles to start rendering at?\r
13// #define END_ROW 27 // ..end\r
14// one row means 8 pixels. If above example was used, (27-1)*8=208 lines would be rendered.\r
15\r
16#define TILE_ROWS END_ROW-START_ROW\r
17\r
18#define USE_CACHE\r
19\r
9112b6ce 20// note: this is not implemented in ARM asm\r
21#if defined(DRAW2_OVERRIDE_LINE_WIDTH)\r
22#define LINE_WIDTH DRAW2_OVERRIDE_LINE_WIDTH\r
23#else\r
24#define LINE_WIDTH 328\r
25#endif\r
cc68a136 26\r
eff55556 27static int HighCache2A[41*(TILE_ROWS+1)+1+1]; // caches for high layers\r
28static int HighCache2B[41*(TILE_ROWS+1)+1+1];\r
cc68a136 29\r
30unsigned short *PicoCramHigh=Pico.cram; // pointer to CRAM buff (0x40 shorts), converted to native device color (works only with 16bit for now)\r
31void (*PicoPrepareCram)()=0; // prepares PicoCramHigh for renderer to use\r
32\r
33\r
34// stuff available in asm:\r
35#ifdef _ASM_DRAW_C\r
36void BackFillFull(int reg7);\r
37void DrawLayerFull(int plane, int *hcache, int planestart, int planeend);\r
38void DrawTilesFromCacheF(int *hc);\r
39void DrawWindowFull(int start, int end, int prio);\r
40void DrawSpriteFull(unsigned int *sprite);\r
41#else\r
42\r
43\r
44static int TileXnormYnorm(unsigned char *pd,int addr,unsigned char pal)\r
45{\r
46 unsigned int pack=0; unsigned int t=0, blank = 1;\r
47 int i;\r
48\r
9112b6ce 49 for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {\r
cc68a136 50 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
51 if(!pack) continue;\r
52\r
53 t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);\r
54 t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);\r
55 t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);\r
56 t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t )|pal);\r
57 t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);\r
58 t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);\r
59 t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);\r
60 t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);\r
61 blank = 0;\r
62 }\r
63\r
64 return blank; // Tile blank?\r
65}\r
66\r
67static int TileXflipYnorm(unsigned char *pd,int addr,unsigned char pal)\r
68{\r
69 unsigned int pack=0; unsigned int t=0, blank = 1;\r
70 int i;\r
71\r
9112b6ce 72 for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {\r
cc68a136 73 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
74 if(!pack) continue;\r
75\r
76 t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);\r
77 t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);\r
78 t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);\r
79 t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);\r
80 t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t )|pal);\r
81 t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);\r
82 t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);\r
83 t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);\r
84 blank = 0;\r
85 }\r
86 return blank; // Tile blank?\r
87}\r
88\r
89static int TileXnormYflip(unsigned char *pd,int addr,unsigned char pal)\r
90{\r
91 unsigned int pack=0; unsigned int t=0, blank = 1;\r
92 int i;\r
93\r
94 addr+=14;\r
9112b6ce 95 for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {\r
cc68a136 96 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
97 if(!pack) continue;\r
98\r
99 t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);\r
100 t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);\r
101 t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);\r
102 t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t )|pal);\r
103 t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);\r
104 t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);\r
105 t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);\r
106 t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);\r
107 blank = 0;\r
108 }\r
109\r
110 return blank; // Tile blank?\r
111}\r
112\r
113static int TileXflipYflip(unsigned char *pd,int addr,unsigned char pal)\r
114{\r
115 unsigned int pack=0; unsigned int t=0, blank = 1;\r
116 int i;\r
117\r
118 addr+=14;\r
9112b6ce 119 for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {\r
cc68a136 120 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
121 if(!pack) continue;\r
122\r
123 t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);\r
124 t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);\r
125 t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);\r
126 t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);\r
127 t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t )|pal);\r
128 t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);\r
129 t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);\r
130 t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);\r
131 blank = 0;\r
132 }\r
133 return blank; // Tile blank?\r
134}\r
135\r
136\r
137// start: (tile_start<<16)|row_start, end: [same]\r
138static void DrawWindowFull(int start, int end, int prio)\r
139{\r
140 struct PicoVideo *pvid=&Pico.video;\r
141 int nametab, nametab_step, trow, tilex, blank=-1, code;\r
e5f426aa 142 unsigned char *scrpos = PicoDraw2FB;\r
cc68a136 143 int tile_start, tile_end; // in cells\r
144\r
145 // parse ranges\r
146 tile_start = start>>16;\r
147 tile_end = end>>16;\r
148 start = start<<16>>16;\r
149 end = end<<16>>16;\r
150\r
151 // Find name table line:\r
152 if (pvid->reg[12]&1)\r
153 {\r
154 nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode\r
155 nametab_step = 1<<6;\r
156 }\r
157 else\r
158 {\r
159 nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode\r
160 nametab_step = 1<<5;\r
161 }\r
162 nametab += nametab_step*start;\r
163\r
164 // check priority\r
165 code=Pico.vram[nametab+tile_start];\r
166 if ((code>>15) != prio) return; // hack: just assume that whole window uses same priority\r
167\r
9112b6ce 168 scrpos+=8*LINE_WIDTH+8;\r
169 scrpos+=8*LINE_WIDTH*(start-START_ROW);\r
cc68a136 170\r
171 // do a window until we reach planestart row\r
172 for(trow = start; trow < end; trow++, nametab+=nametab_step) { // current tile row\r
173 for (tilex=tile_start; tilex<tile_end; tilex++)\r
174 {\r
175 int code,addr,zero=0;\r
176// unsigned short *pal=NULL;\r
177 unsigned char pal;\r
178\r
179 code=Pico.vram[nametab+tilex];\r
180 if (code==blank) continue;\r
181\r
182 // Get tile address/2:\r
183 addr=(code&0x7ff)<<4;\r
184\r
185// pal=PicoCramHigh+((code>>9)&0x30);\r
186 pal=(unsigned char)((code>>9)&0x30);\r
187\r
188 switch((code>>11)&3) {\r
189 case 0: zero=TileXnormYnorm(scrpos+(tilex<<3),addr,pal); break;\r
190 case 1: zero=TileXflipYnorm(scrpos+(tilex<<3),addr,pal); break;\r
191 case 2: zero=TileXnormYflip(scrpos+(tilex<<3),addr,pal); break;\r
192 case 3: zero=TileXflipYflip(scrpos+(tilex<<3),addr,pal); break;\r
193 }\r
194 if(zero) blank=code; // We know this tile is blank now\r
195 }\r
196\r
9112b6ce 197 scrpos += LINE_WIDTH*8;\r
cc68a136 198 }\r
199}\r
200\r
201\r
202static void DrawLayerFull(int plane, int *hcache, int planestart, int planeend)\r
203{\r
204 struct PicoVideo *pvid=&Pico.video;\r
205 static char shift[4]={5,6,6,7}; // 32,64 or 128 sized tilemaps\r
206 int width, height, ymask, htab;\r
207 int nametab, hscroll=0, vscroll, cells;\r
208 unsigned char *scrpos;\r
209 int blank=-1, xmask, nametab_row, trow;\r
210\r
211 // parse ranges\r
212 cells = (planeend>>16)-(planestart>>16);\r
213 planestart = planestart<<16>>16;\r
214 planeend = planeend<<16>>16;\r
215\r
216 // Work out the Tiles to draw\r
217\r
218 htab=pvid->reg[13]<<9; // Horizontal scroll table address\r
219// if ( pvid->reg[11]&2) htab+=Scanline<<1; // Offset by line\r
220// if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile\r
221 htab+=plane; // A or B\r
222\r
223 if(!(pvid->reg[11]&3)) { // full screen scroll\r
224 // Get horizontal scroll value\r
225 hscroll=Pico.vram[htab&0x7fff];\r
226 htab = 0; // this marks that we don't have to update scroll value\r
227 }\r
228\r
229 // Work out the name table size: 32 64 or 128 tiles (0-3)\r
230 width=pvid->reg[16];\r
231 height=(width>>4)&3; width&=3;\r
232\r
233 xmask=(1<<shift[width ])-1; // X Mask in tiles\r
eff55556 234 ymask=(height<<5)|0x1f; // Y Mask in tiles\r
235 if(width == 1) ymask&=0x3f;\r
236 else if(width>1) ymask =0x1f;\r
cc68a136 237\r
238 // Find name table:\r
239 if (plane==0) nametab=(pvid->reg[2]&0x38)<< 9; // A\r
240 else nametab=(pvid->reg[4]&0x07)<<12; // B\r
241\r
e5f426aa 242 scrpos = PicoDraw2FB;\r
9112b6ce 243 scrpos+=8*LINE_WIDTH*(planestart-START_ROW);\r
cc68a136 244\r
245 // Get vertical scroll value:\r
246 vscroll=Pico.vsram[plane]&0x1ff;\r
9112b6ce 247 scrpos+=(8-(vscroll&7))*LINE_WIDTH;\r
cc68a136 248 if(vscroll&7) planeend++; // we have vertically clipped tiles due to vscroll, so we need 1 more row\r
249\r
250 *hcache++ = 8-(vscroll&7); // push y-offset to tilecache\r
251\r
252\r
253 for(trow = planestart; trow < planeend; trow++) { // current tile row\r
254 int cellc=cells,tilex,dx;\r
255\r
256 // Find the tile row in the name table\r
257 //ts.line=(vscroll+Scanline)&ymask;\r
258 //ts.nametab+=(ts.line>>3)<<shift[width];\r
259 nametab_row = nametab + (((trow+(vscroll>>3))&ymask)<<shift[width]); // pointer to nametable entries for this row\r
260\r
261 // update hscroll if needed\r
262 if(htab) {\r
263 int htaddr=htab+(trow<<4);\r
264 if(trow) htaddr-=(vscroll&7)<<1;\r
265 hscroll=Pico.vram[htaddr&0x7fff];\r
266 }\r
267\r
268 // Draw tiles across screen:\r
269 tilex=(-hscroll)>>3;\r
270 dx=((hscroll-1)&7)+1;\r
271 if(dx != 8) cellc++; // have hscroll, do more cells\r
272\r
273 for (; cellc; dx+=8,tilex++,cellc--)\r
274 {\r
275 int code=0,addr=0,zero=0;\r
276// unsigned short *pal=NULL;\r
277 unsigned char pal;\r
278\r
279 code=Pico.vram[nametab_row+(tilex&xmask)];\r
280 if (code==blank) continue;\r
281\r
cc68a136 282 if (code>>15) { // high priority tile\r
283 *hcache++ = code|(dx<<16)|(trow<<27); // cache it\r
cc68a136 284 continue;\r
285 }\r
286\r
287 // Get tile address/2:\r
288 addr=(code&0x7ff)<<4;\r
289\r
290// pal=PicoCramHigh+((code>>9)&0x30);\r
291 pal=(unsigned char)((code>>9)&0x30);\r
292\r
293 switch((code>>11)&3) {\r
294 case 0: zero=TileXnormYnorm(scrpos+dx,addr,pal); break;\r
295 case 1: zero=TileXflipYnorm(scrpos+dx,addr,pal); break;\r
296 case 2: zero=TileXnormYflip(scrpos+dx,addr,pal); break;\r
297 case 3: zero=TileXflipYflip(scrpos+dx,addr,pal); break;\r
298 }\r
299 if(zero) blank=code; // We know this tile is blank now\r
300 }\r
301\r
9112b6ce 302 scrpos += LINE_WIDTH*8;\r
cc68a136 303 }\r
304\r
305 *hcache = 0; // terminate cache\r
306}\r
307\r
308\r
309static void DrawTilesFromCacheF(int *hc)\r
310{\r
311 int code, addr, zero = 0;\r
312 unsigned int prevy=0xFFFFFFFF;\r
313// unsigned short *pal;\r
314 unsigned char pal;\r
315 short blank=-1; // The tile we know is blank\r
e5f426aa 316 unsigned char *scrpos = PicoDraw2FB, *pd = 0;\r
cc68a136 317\r
318 // *hcache++ = code|(dx<<16)|(trow<<27); // cache it\r
9112b6ce 319 scrpos+=(*hc++)*LINE_WIDTH - START_ROW*LINE_WIDTH*8;\r
cc68a136 320\r
321 while((code=*hc++)) {\r
322 if((short)code == blank) continue;\r
323\r
324 // y pos\r
325 if(((unsigned)code>>27) != prevy) {\r
326 prevy = (unsigned)code>>27;\r
9112b6ce 327 pd = scrpos + prevy*LINE_WIDTH*8;\r
cc68a136 328 }\r
329\r
330 // Get tile address/2:\r
331 addr=(code&0x7ff)<<4;\r
332// pal=PicoCramHigh+((code>>9)&0x30);\r
333 pal=(unsigned char)((code>>9)&0x30);\r
334\r
335 switch((code>>11)&3) {\r
336 case 0: zero=TileXnormYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r
337 case 1: zero=TileXflipYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r
338 case 2: zero=TileXnormYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r
339 case 3: zero=TileXflipYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r
340 }\r
341\r
342 if(zero) blank=(short)code;\r
343 }\r
344}\r
345\r
346\r
347// sx and sy are coords of virtual screen with 8pix borders on top and on left\r
348static void DrawSpriteFull(unsigned int *sprite)\r
349{\r
350 int width=0,height=0;\r
351// unsigned short *pal=NULL;\r
352 unsigned char pal;\r
353 int tile,code,tdeltax,tdeltay;\r
354 unsigned char *scrpos;\r
355 int sx, sy;\r
356\r
357 sy=sprite[0];\r
358 height=sy>>24;\r
359 sy=(sy&0x1ff)-0x78; // Y\r
360 width=(height>>2)&3; height&=3;\r
361 width++; height++; // Width and height in tiles\r
362\r
363 code=sprite[1];\r
364 sx=((code>>16)&0x1ff)-0x78; // X\r
365\r
366 tile=code&0x7ff; // Tile number\r
367 tdeltax=height; // Delta to increase tile by going right\r
368 tdeltay=1; // Delta to increase tile by going down\r
369 if (code&0x0800) { tdeltax=-tdeltax; tile+=height*(width-1); } // Flip X\r
370 if (code&0x1000) { tdeltay=-tdeltay; tile+=height-1; } // Flip Y\r
371\r
372 //delta<<=4; // Delta of address\r
373// pal=PicoCramHigh+((code>>9)&0x30); // Get palette pointer\r
374 pal=(unsigned char)((code>>9)&0x30);\r
375\r
376 // goto first vertically visible tile\r
377 while(sy <= START_ROW*8) { sy+=8; tile+=tdeltay; height--; }\r
378\r
e5f426aa 379 scrpos = PicoDraw2FB;\r
9112b6ce 380 scrpos+=(sy-START_ROW*8)*LINE_WIDTH;\r
cc68a136 381\r
382 for (; height > 0; height--, sy+=8, tile+=tdeltay)\r
383 {\r
384 int w = width, x=sx, t=tile;\r
385\r
386 if(sy >= END_ROW*8+8) return; // offscreen\r
387\r
388 for (; w; w--,x+=8,t+=tdeltax)\r
389 {\r
390 if(x<=0) continue;\r
391 if(x>=328) break; // Offscreen\r
392\r
393 t&=0x7fff; // Clip tile address\r
394 switch((code>>11)&3) {\r
395 case 0: TileXnormYnorm(scrpos+x,t<<4,pal); break;\r
396 case 1: TileXflipYnorm(scrpos+x,t<<4,pal); break;\r
397 case 2: TileXnormYflip(scrpos+x,t<<4,pal); break;\r
398 case 3: TileXflipYflip(scrpos+x,t<<4,pal); break;\r
399 }\r
400 }\r
401\r
9112b6ce 402 scrpos+=8*LINE_WIDTH;\r
cc68a136 403 }\r
404}\r
405#endif\r
406\r
407\r
408static void DrawAllSpritesFull(int prio, int maxwidth)\r
409{\r
410 struct PicoVideo *pvid=&Pico.video;\r
411 int table=0,maskrange=0;\r
412 int i,u,link=0;\r
413 unsigned int *sprites[80]; // Sprites\r
414 int y_min=START_ROW*8, y_max=END_ROW*8; // for a simple sprite masking\r
415\r
416 table=pvid->reg[5]&0x7f;\r
417 if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r
418 table<<=8; // Get sprite table address/2\r
419\r
420 for (i=u=0; u < 80; u++)\r
421 {\r
422 unsigned int *sprite=NULL;\r
423 int code, code2, sx, sy, height;\r
424\r
425 sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r
426\r
427 // get sprite info\r
428 code = sprite[0];\r
429\r
430 // check if it is not hidden vertically\r
431 sy = (code&0x1ff)-0x80;\r
432 height = (((code>>24)&3)+1)<<3;\r
433 if(sy+height <= y_min || sy > y_max) goto nextsprite;\r
434\r
435 // masking sprite?\r
436 code2=sprite[1];\r
437 sx = (code2>>16)&0x1ff;\r
438 if(!sx) {\r
439 int to = sy+height; // sy ~ from\r
440 if(maskrange) {\r
441 // try to merge with previous range\r
442 if((maskrange>>16)+1 >= sy && (maskrange>>16) <= to && (maskrange&0xffff) < sy) sy = (maskrange&0xffff);\r
443 else if((maskrange&0xffff)-1 <= to && (maskrange&0xffff) >= sy && (maskrange>>16) > to) to = (maskrange>>16);\r
444 }\r
445 // support only very simple masking (top and bottom of screen)\r
446 if(sy <= y_min && to+1 > y_min) y_min = to+1;\r
447 else if(to >= y_max && sy-1 < y_max) y_max = sy-1;\r
448 else maskrange=sy|(to<<16);\r
449\r
450 goto nextsprite;\r
451 }\r
452\r
453 // priority\r
454 if(((code2>>15)&1) != prio) goto nextsprite; // wrong priority\r
455\r
456 // check if sprite is not hidden horizontally\r
457 sx -= 0x78; // Get X coordinate + 8\r
458 if(sx <= -8*3 || sx >= maxwidth) goto nextsprite;\r
459\r
460 // sprite is good, save it's index\r
461 sprites[i++]=sprite;\r
462\r
463 nextsprite:\r
464 // Find next sprite\r
465 link=(code>>16)&0x7f;\r
466 if(!link) break; // End of sprites\r
467 }\r
468\r
469 // Go through sprites backwards:\r
470 for (i-- ;i>=0; i--)\r
471 {\r
472 DrawSpriteFull(sprites[i]);\r
473 }\r
474}\r
475\r
476#ifndef _ASM_DRAW_C\r
477static void BackFillFull(int reg7)\r
478{\r
b542be46 479 unsigned int back;\r
cc68a136 480\r
481 // Start with a background color:\r
482// back=PicoCramHigh[reg7&0x3f];\r
483 back=reg7&0x3f;\r
484 back|=back<<8;\r
485 back|=back<<16;\r
486\r
b542be46 487 memset32((int *)PicoDraw2FB, back, LINE_WIDTH*(8+(END_ROW-START_ROW)*8)/4);\r
cc68a136 488}\r
489#endif\r
490\r
f579f7b8 491static void DrawDisplayFull(void)\r
cc68a136 492{\r
493 struct PicoVideo *pvid=&Pico.video;\r
494 int win, edge=0, hvwin=0; // LSb->MSb: hwin&plane, vwin&plane, full\r
495 int planestart=START_ROW, planeend=END_ROW; // plane A start/end when window shares display with plane A (in tile rows or columns)\r
496 int winstart=START_ROW, winend=END_ROW; // same for window\r
497 int maxw, maxcolc; // max width and col cells\r
498\r
499 if(pvid->reg[12]&1) {\r
500 maxw = 328; maxcolc = 40;\r
501 } else {\r
502 maxw = 264; maxcolc = 32;\r
503 }\r
504\r
505 // horizontal window?\r
f579f7b8 506 if ((win=pvid->reg[0x12]))\r
507 {\r
cc68a136 508 hvwin=1; // hwindow shares display with plane A\r
509 edge=win&0x1f;\r
510 if(win == 0x80) {\r
511 // fullscreen window\r
512 hvwin=4;\r
513 } else if(win < 0x80) {\r
514 // window on the top\r
515 if(edge <= START_ROW) hvwin=0; // window not visible in our drawing region\r
516 else if(edge >= END_ROW) hvwin=4;\r
517 else planestart = winend = edge;\r
518 } else if(win > 0x80) {\r
519 // window at the bottom\r
520 if(edge >= END_ROW) hvwin=0;\r
521 else planeend = winstart = edge;\r
522 }\r
523 }\r
524\r
525 // check for vertical window, but only if win is not fullscreen\r
f579f7b8 526 if (hvwin != 4)\r
527 {\r
cc68a136 528 win=pvid->reg[0x11];\r
529 edge=win&0x1f;\r
530 if (win&0x80) {\r
531 if(!edge) hvwin=4;\r
532 else if(edge < (maxcolc>>1)) {\r
533 // window is on the right\r
534 hvwin|=2;\r
535 planeend|=edge<<17;\r
536 winstart|=edge<<17;\r
537 winend|=maxcolc<<16;\r
538 }\r
539 } else {\r
540 if(edge >= (maxcolc>>1)) hvwin=4;\r
541 else if(edge) {\r
542 // window is on the left\r
543 hvwin|=2;\r
544 winend|=edge<<17;\r
545 planestart|=edge<<17;\r
546 planeend|=maxcolc<<16;\r
547 }\r
548 }\r
549 }\r
550\r
f579f7b8 551 if (hvwin==1) { winend|=maxcolc<<16; planeend|=maxcolc<<16; }\r
cc68a136 552\r
f579f7b8 553 HighCache2A[1] = HighCache2B[1] = 0;\r
554 if (PicoDrawMask & PDRAW_LAYERB_ON)\r
555 DrawLayerFull(1, HighCache2B, START_ROW, (maxcolc<<16)|END_ROW);\r
556 if (PicoDrawMask & PDRAW_LAYERA_ON) switch (hvwin)\r
557 {\r
cc68a136 558 case 4:\r
559 // fullscreen window\r
560 DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 0);\r
cc68a136 561 break;\r
562\r
563 case 3:\r
564 // we have plane A and both v and h windows\r
eff55556 565 DrawLayerFull(0, HighCache2A, planestart, planeend);\r
cc68a136 566 DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 0); // h\r
567 DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 0); // v\r
568 break;\r
569\r
570 case 2:\r
571 case 1:\r
572 // both window and plane A visible, window is vertical XOR horizontal\r
eff55556 573 DrawLayerFull(0, HighCache2A, planestart, planeend);\r
cc68a136 574 DrawWindowFull(winstart, winend, 0);\r
575 break;\r
576\r
577 default:\r
578 // fullscreen plane A\r
eff55556 579 DrawLayerFull(0, HighCache2A, START_ROW, (maxcolc<<16)|END_ROW);\r
cc68a136 580 break;\r
581 }\r
f579f7b8 582 if (PicoDrawMask & PDRAW_SPRITES_LOW_ON)\r
583 DrawAllSpritesFull(0, maxw);\r
cc68a136 584\r
f579f7b8 585 if (HighCache2B[1]) DrawTilesFromCacheF(HighCache2B);\r
586 if (HighCache2A[1]) DrawTilesFromCacheF(HighCache2A);\r
8cf22667 587 if (PicoDrawMask & PDRAW_LAYERA_ON) switch (hvwin)\r
f579f7b8 588 {\r
cc68a136 589 case 4:\r
590 // fullscreen window\r
591 DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 1);\r
592 break;\r
593\r
594 case 3:\r
595 // we have plane A and both v and h windows\r
596 DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 1); // h\r
597 DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 1); // v\r
598 break;\r
599\r
600 case 2:\r
601 case 1:\r
602 // both window and plane A visible, window is vertical XOR horizontal\r
603 DrawWindowFull(winstart, winend, 1);\r
604 break;\r
605 }\r
f579f7b8 606 if (PicoDrawMask & PDRAW_SPRITES_HI_ON)\r
607 DrawAllSpritesFull(1, maxw);\r
cc68a136 608}\r
609\r
610\r
eff55556 611PICO_INTERNAL void PicoFrameFull()\r
cc68a136 612{\r
25eb407c 613 pprof_start(draw);\r
614\r
cc68a136 615 // prepare cram?\r
f579f7b8 616 if (PicoPrepareCram) PicoPrepareCram();\r
cc68a136 617\r
618 // Draw screen:\r
619 BackFillFull(Pico.video.reg[7]);\r
25eb407c 620 if (Pico.video.reg[1] & 0x40)\r
621 DrawDisplayFull();\r
622\r
623 pprof_end(draw);\r
cc68a136 624}\r
625\r
fast MegaDrive/MegaCD/32X emulator