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z80/ym2612 reset handling improved
[picodrive.git] / Pico / Draw2.c
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1// This is part of Pico Library\r
2\r
3// (c) Copyright 2007, Grazvydas "notaz" Ignotas\r
4// Free for non-commercial use.\r
5\r
6// For commercial use, separate licencing terms must be obtained.\r
7\r
8\r
9// this is a frame-based renderer, alternative to Dave's line based which is in Draw.c\r
10\r
11\r
12#include "PicoInt.h"\r
13\r
14// port_config.h include must define these 2 defines:\r
15// #define START_ROW 1 // which row of tiles to start rendering at?\r
16// #define END_ROW 27 // ..end\r
17// one row means 8 pixels. If above example was used, (27-1)*8=208 lines would be rendered.\r
18\r
19#define TILE_ROWS END_ROW-START_ROW\r
20\r
21#define USE_CACHE\r
22\r
23// note: this is not implemented in ARM asm\r
24#if defined(DRAW2_OVERRIDE_LINE_WIDTH)\r
25#define LINE_WIDTH DRAW2_OVERRIDE_LINE_WIDTH\r
26#else\r
27#define LINE_WIDTH 328\r
28#endif\r
29\r
30int currpri = 0;\r
31\r
32static int HighCache2A[41*(TILE_ROWS+1)+1+1]; // caches for high layers\r
33static int HighCache2B[41*(TILE_ROWS+1)+1+1];\r
34\r
35unsigned short *PicoCramHigh=Pico.cram; // pointer to CRAM buff (0x40 shorts), converted to native device color (works only with 16bit for now)\r
36void (*PicoPrepareCram)()=0; // prepares PicoCramHigh for renderer to use\r
37\r
38\r
39// stuff available in asm:\r
40#ifdef _ASM_DRAW_C\r
41void BackFillFull(int reg7);\r
42void DrawLayerFull(int plane, int *hcache, int planestart, int planeend);\r
43void DrawTilesFromCacheF(int *hc);\r
44void DrawWindowFull(int start, int end, int prio);\r
45void DrawSpriteFull(unsigned int *sprite);\r
46#else\r
47\r
48\r
49static int TileXnormYnorm(unsigned char *pd,int addr,unsigned char pal)\r
50{\r
51 unsigned int pack=0; unsigned int t=0, blank = 1;\r
52 int i;\r
53\r
54 for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {\r
55 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
56 if(!pack) continue;\r
57\r
58 t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);\r
59 t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);\r
60 t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);\r
61 t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t )|pal);\r
62 t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);\r
63 t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);\r
64 t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);\r
65 t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);\r
66 blank = 0;\r
67 }\r
68\r
69 return blank; // Tile blank?\r
70}\r
71\r
72static int TileXflipYnorm(unsigned char *pd,int addr,unsigned char pal)\r
73{\r
74 unsigned int pack=0; unsigned int t=0, blank = 1;\r
75 int i;\r
76\r
77 for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {\r
78 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
79 if(!pack) continue;\r
80\r
81 t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);\r
82 t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);\r
83 t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);\r
84 t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);\r
85 t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t )|pal);\r
86 t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);\r
87 t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);\r
88 t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);\r
89 blank = 0;\r
90 }\r
91 return blank; // Tile blank?\r
92}\r
93\r
94static int TileXnormYflip(unsigned char *pd,int addr,unsigned char pal)\r
95{\r
96 unsigned int pack=0; unsigned int t=0, blank = 1;\r
97 int i;\r
98\r
99 addr+=14;\r
100 for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {\r
101 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
102 if(!pack) continue;\r
103\r
104 t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);\r
105 t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);\r
106 t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);\r
107 t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t )|pal);\r
108 t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);\r
109 t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);\r
110 t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);\r
111 t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);\r
112 blank = 0;\r
113 }\r
114\r
115 return blank; // Tile blank?\r
116}\r
117\r
118static int TileXflipYflip(unsigned char *pd,int addr,unsigned char pal)\r
119{\r
120 unsigned int pack=0; unsigned int t=0, blank = 1;\r
121 int i;\r
122\r
123 addr+=14;\r
124 for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {\r
125 pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
126 if(!pack) continue;\r
127\r
128 t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);\r
129 t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);\r
130 t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);\r
131 t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);\r
132 t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t )|pal);\r
133 t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);\r
134 t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);\r
135 t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);\r
136 blank = 0;\r
137 }\r
138 return blank; // Tile blank?\r
139}\r
140\r
141\r
142// start: (tile_start<<16)|row_start, end: [same]\r
143static void DrawWindowFull(int start, int end, int prio)\r
144{\r
145 struct PicoVideo *pvid=&Pico.video;\r
146 int nametab, nametab_step, trow, tilex, blank=-1, code;\r
147 unsigned char *scrpos = PicoDraw2FB;\r
148 int tile_start, tile_end; // in cells\r
149\r
150 // parse ranges\r
151 tile_start = start>>16;\r
152 tile_end = end>>16;\r
153 start = start<<16>>16;\r
154 end = end<<16>>16;\r
155\r
156 // Find name table line:\r
157 if (pvid->reg[12]&1)\r
158 {\r
159 nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode\r
160 nametab_step = 1<<6;\r
161 }\r
162 else\r
163 {\r
164 nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode\r
165 nametab_step = 1<<5;\r
166 }\r
167 nametab += nametab_step*start;\r
168\r
169 // check priority\r
170 code=Pico.vram[nametab+tile_start];\r
171 if ((code>>15) != prio) return; // hack: just assume that whole window uses same priority\r
172\r
173 scrpos+=8*LINE_WIDTH+8;\r
174 scrpos+=8*LINE_WIDTH*(start-START_ROW);\r
175\r
176 // do a window until we reach planestart row\r
177 for(trow = start; trow < end; trow++, nametab+=nametab_step) { // current tile row\r
178 for (tilex=tile_start; tilex<tile_end; tilex++)\r
179 {\r
180 int code,addr,zero=0;\r
181// unsigned short *pal=NULL;\r
182 unsigned char pal;\r
183\r
184 code=Pico.vram[nametab+tilex];\r
185 if (code==blank) continue;\r
186\r
187 // Get tile address/2:\r
188 addr=(code&0x7ff)<<4;\r
189\r
190// pal=PicoCramHigh+((code>>9)&0x30);\r
191 pal=(unsigned char)((code>>9)&0x30);\r
192\r
193 switch((code>>11)&3) {\r
194 case 0: zero=TileXnormYnorm(scrpos+(tilex<<3),addr,pal); break;\r
195 case 1: zero=TileXflipYnorm(scrpos+(tilex<<3),addr,pal); break;\r
196 case 2: zero=TileXnormYflip(scrpos+(tilex<<3),addr,pal); break;\r
197 case 3: zero=TileXflipYflip(scrpos+(tilex<<3),addr,pal); break;\r
198 }\r
199 if(zero) blank=code; // We know this tile is blank now\r
200 }\r
201\r
202 scrpos += LINE_WIDTH*8;\r
203 }\r
204}\r
205\r
206\r
207static void DrawLayerFull(int plane, int *hcache, int planestart, int planeend)\r
208{\r
209 struct PicoVideo *pvid=&Pico.video;\r
210 static char shift[4]={5,6,6,7}; // 32,64 or 128 sized tilemaps\r
211 int width, height, ymask, htab;\r
212 int nametab, hscroll=0, vscroll, cells;\r
213 unsigned char *scrpos;\r
214 int blank=-1, xmask, nametab_row, trow;\r
215\r
216 // parse ranges\r
217 cells = (planeend>>16)-(planestart>>16);\r
218 planestart = planestart<<16>>16;\r
219 planeend = planeend<<16>>16;\r
220\r
221 // Work out the Tiles to draw\r
222\r
223 htab=pvid->reg[13]<<9; // Horizontal scroll table address\r
224// if ( pvid->reg[11]&2) htab+=Scanline<<1; // Offset by line\r
225// if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile\r
226 htab+=plane; // A or B\r
227\r
228 if(!(pvid->reg[11]&3)) { // full screen scroll\r
229 // Get horizontal scroll value\r
230 hscroll=Pico.vram[htab&0x7fff];\r
231 htab = 0; // this marks that we don't have to update scroll value\r
232 }\r
233\r
234 // Work out the name table size: 32 64 or 128 tiles (0-3)\r
235 width=pvid->reg[16];\r
236 height=(width>>4)&3; width&=3;\r
237\r
238 xmask=(1<<shift[width ])-1; // X Mask in tiles\r
239 ymask=(height<<5)|0x1f; // Y Mask in tiles\r
240 if(width == 1) ymask&=0x3f;\r
241 else if(width>1) ymask =0x1f;\r
242\r
243 // Find name table:\r
244 if (plane==0) nametab=(pvid->reg[2]&0x38)<< 9; // A\r
245 else nametab=(pvid->reg[4]&0x07)<<12; // B\r
246\r
247 scrpos = PicoDraw2FB;\r
248 scrpos+=8*LINE_WIDTH*(planestart-START_ROW);\r
249\r
250 // Get vertical scroll value:\r
251 vscroll=Pico.vsram[plane]&0x1ff;\r
252 scrpos+=(8-(vscroll&7))*LINE_WIDTH;\r
253 if(vscroll&7) planeend++; // we have vertically clipped tiles due to vscroll, so we need 1 more row\r
254\r
255 *hcache++ = 8-(vscroll&7); // push y-offset to tilecache\r
256\r
257\r
258 for(trow = planestart; trow < planeend; trow++) { // current tile row\r
259 int cellc=cells,tilex,dx;\r
260\r
261 // Find the tile row in the name table\r
262 //ts.line=(vscroll+Scanline)&ymask;\r
263 //ts.nametab+=(ts.line>>3)<<shift[width];\r
264 nametab_row = nametab + (((trow+(vscroll>>3))&ymask)<<shift[width]); // pointer to nametable entries for this row\r
265\r
266 // update hscroll if needed\r
267 if(htab) {\r
268 int htaddr=htab+(trow<<4);\r
269 if(trow) htaddr-=(vscroll&7)<<1;\r
270 hscroll=Pico.vram[htaddr&0x7fff];\r
271 }\r
272\r
273 // Draw tiles across screen:\r
274 tilex=(-hscroll)>>3;\r
275 dx=((hscroll-1)&7)+1;\r
276 if(dx != 8) cellc++; // have hscroll, do more cells\r
277\r
278 for (; cellc; dx+=8,tilex++,cellc--)\r
279 {\r
280 int code=0,addr=0,zero=0;\r
281// unsigned short *pal=NULL;\r
282 unsigned char pal;\r
283\r
284 code=Pico.vram[nametab_row+(tilex&xmask)];\r
285 if (code==blank) continue;\r
286\r
287#ifdef USE_CACHE\r
288 if (code>>15) { // high priority tile\r
289 *hcache++ = code|(dx<<16)|(trow<<27); // cache it\r
290#else\r
291 if ((code>>15) != currpri) {\r
292#endif\r
293 continue;\r
294 }\r
295\r
296 // Get tile address/2:\r
297 addr=(code&0x7ff)<<4;\r
298\r
299// pal=PicoCramHigh+((code>>9)&0x30);\r
300 pal=(unsigned char)((code>>9)&0x30);\r
301\r
302 switch((code>>11)&3) {\r
303 case 0: zero=TileXnormYnorm(scrpos+dx,addr,pal); break;\r
304 case 1: zero=TileXflipYnorm(scrpos+dx,addr,pal); break;\r
305 case 2: zero=TileXnormYflip(scrpos+dx,addr,pal); break;\r
306 case 3: zero=TileXflipYflip(scrpos+dx,addr,pal); break;\r
307 }\r
308 if(zero) blank=code; // We know this tile is blank now\r
309 }\r
310\r
311 scrpos += LINE_WIDTH*8;\r
312 }\r
313\r
314 *hcache = 0; // terminate cache\r
315}\r
316\r
317\r
318static void DrawTilesFromCacheF(int *hc)\r
319{\r
320 int code, addr, zero = 0;\r
321 unsigned int prevy=0xFFFFFFFF;\r
322// unsigned short *pal;\r
323 unsigned char pal;\r
324 short blank=-1; // The tile we know is blank\r
325 unsigned char *scrpos = PicoDraw2FB, *pd = 0;\r
326\r
327 // *hcache++ = code|(dx<<16)|(trow<<27); // cache it\r
328 scrpos+=(*hc++)*LINE_WIDTH - START_ROW*LINE_WIDTH*8;\r
329\r
330 while((code=*hc++)) {\r
331 if((short)code == blank) continue;\r
332\r
333 // y pos\r
334 if(((unsigned)code>>27) != prevy) {\r
335 prevy = (unsigned)code>>27;\r
336 pd = scrpos + prevy*LINE_WIDTH*8;\r
337 }\r
338\r
339 // Get tile address/2:\r
340 addr=(code&0x7ff)<<4;\r
341// pal=PicoCramHigh+((code>>9)&0x30);\r
342 pal=(unsigned char)((code>>9)&0x30);\r
343\r
344 switch((code>>11)&3) {\r
345 case 0: zero=TileXnormYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r
346 case 1: zero=TileXflipYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r
347 case 2: zero=TileXnormYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r
348 case 3: zero=TileXflipYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r
349 }\r
350\r
351 if(zero) blank=(short)code;\r
352 }\r
353}\r
354\r
355\r
356// sx and sy are coords of virtual screen with 8pix borders on top and on left\r
357static void DrawSpriteFull(unsigned int *sprite)\r
358{\r
359 int width=0,height=0;\r
360// unsigned short *pal=NULL;\r
361 unsigned char pal;\r
362 int tile,code,tdeltax,tdeltay;\r
363 unsigned char *scrpos;\r
364 int sx, sy;\r
365\r
366 sy=sprite[0];\r
367 height=sy>>24;\r
368 sy=(sy&0x1ff)-0x78; // Y\r
369 width=(height>>2)&3; height&=3;\r
370 width++; height++; // Width and height in tiles\r
371\r
372 code=sprite[1];\r
373 sx=((code>>16)&0x1ff)-0x78; // X\r
374\r
375 tile=code&0x7ff; // Tile number\r
376 tdeltax=height; // Delta to increase tile by going right\r
377 tdeltay=1; // Delta to increase tile by going down\r
378 if (code&0x0800) { tdeltax=-tdeltax; tile+=height*(width-1); } // Flip X\r
379 if (code&0x1000) { tdeltay=-tdeltay; tile+=height-1; } // Flip Y\r
380\r
381 //delta<<=4; // Delta of address\r
382// pal=PicoCramHigh+((code>>9)&0x30); // Get palette pointer\r
383 pal=(unsigned char)((code>>9)&0x30);\r
384\r
385 // goto first vertically visible tile\r
386 while(sy <= START_ROW*8) { sy+=8; tile+=tdeltay; height--; }\r
387\r
388 scrpos = PicoDraw2FB;\r
389 scrpos+=(sy-START_ROW*8)*LINE_WIDTH;\r
390\r
391 for (; height > 0; height--, sy+=8, tile+=tdeltay)\r
392 {\r
393 int w = width, x=sx, t=tile;\r
394\r
395 if(sy >= END_ROW*8+8) return; // offscreen\r
396\r
397 for (; w; w--,x+=8,t+=tdeltax)\r
398 {\r
399 if(x<=0) continue;\r
400 if(x>=328) break; // Offscreen\r
401\r
402 t&=0x7fff; // Clip tile address\r
403 switch((code>>11)&3) {\r
404 case 0: TileXnormYnorm(scrpos+x,t<<4,pal); break;\r
405 case 1: TileXflipYnorm(scrpos+x,t<<4,pal); break;\r
406 case 2: TileXnormYflip(scrpos+x,t<<4,pal); break;\r
407 case 3: TileXflipYflip(scrpos+x,t<<4,pal); break;\r
408 }\r
409 }\r
410\r
411 scrpos+=8*LINE_WIDTH;\r
412 }\r
413}\r
414#endif\r
415\r
416\r
417static void DrawAllSpritesFull(int prio, int maxwidth)\r
418{\r
419 struct PicoVideo *pvid=&Pico.video;\r
420 int table=0,maskrange=0;\r
421 int i,u,link=0;\r
422 unsigned int *sprites[80]; // Sprites\r
423 int y_min=START_ROW*8, y_max=END_ROW*8; // for a simple sprite masking\r
424\r
425 table=pvid->reg[5]&0x7f;\r
426 if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r
427 table<<=8; // Get sprite table address/2\r
428\r
429 for (i=u=0; u < 80; u++)\r
430 {\r
431 unsigned int *sprite=NULL;\r
432 int code, code2, sx, sy, height;\r
433\r
434 sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r
435\r
436 // get sprite info\r
437 code = sprite[0];\r
438\r
439 // check if it is not hidden vertically\r
440 sy = (code&0x1ff)-0x80;\r
441 height = (((code>>24)&3)+1)<<3;\r
442 if(sy+height <= y_min || sy > y_max) goto nextsprite;\r
443\r
444 // masking sprite?\r
445 code2=sprite[1];\r
446 sx = (code2>>16)&0x1ff;\r
447 if(!sx) {\r
448 int to = sy+height; // sy ~ from\r
449 if(maskrange) {\r
450 // try to merge with previous range\r
451 if((maskrange>>16)+1 >= sy && (maskrange>>16) <= to && (maskrange&0xffff) < sy) sy = (maskrange&0xffff);\r
452 else if((maskrange&0xffff)-1 <= to && (maskrange&0xffff) >= sy && (maskrange>>16) > to) to = (maskrange>>16);\r
453 }\r
454 // support only very simple masking (top and bottom of screen)\r
455 if(sy <= y_min && to+1 > y_min) y_min = to+1;\r
456 else if(to >= y_max && sy-1 < y_max) y_max = sy-1;\r
457 else maskrange=sy|(to<<16);\r
458\r
459 goto nextsprite;\r
460 }\r
461\r
462 // priority\r
463 if(((code2>>15)&1) != prio) goto nextsprite; // wrong priority\r
464\r
465 // check if sprite is not hidden horizontally\r
466 sx -= 0x78; // Get X coordinate + 8\r
467 if(sx <= -8*3 || sx >= maxwidth) goto nextsprite;\r
468\r
469 // sprite is good, save it's index\r
470 sprites[i++]=sprite;\r
471\r
472 nextsprite:\r
473 // Find next sprite\r
474 link=(code>>16)&0x7f;\r
475 if(!link) break; // End of sprites\r
476 }\r
477\r
478 // Go through sprites backwards:\r
479 for (i-- ;i>=0; i--)\r
480 {\r
481 DrawSpriteFull(sprites[i]);\r
482 }\r
483}\r
484\r
485#ifndef _ASM_DRAW_C\r
486static void BackFillFull(int reg7)\r
487{\r
488 unsigned int back;\r
489\r
490 // Start with a background color:\r
491// back=PicoCramHigh[reg7&0x3f];\r
492 back=reg7&0x3f;\r
493 back|=back<<8;\r
494 back|=back<<16;\r
495\r
496 memset32((int *)PicoDraw2FB, back, LINE_WIDTH*(8+(END_ROW-START_ROW)*8)/4);\r
497}\r
498#endif\r
499\r
500static void DrawDisplayFull()\r
501{\r
502 struct PicoVideo *pvid=&Pico.video;\r
503 int win, edge=0, hvwin=0; // LSb->MSb: hwin&plane, vwin&plane, full\r
504 int planestart=START_ROW, planeend=END_ROW; // plane A start/end when window shares display with plane A (in tile rows or columns)\r
505 int winstart=START_ROW, winend=END_ROW; // same for window\r
506 int maxw, maxcolc; // max width and col cells\r
507\r
508 if(pvid->reg[12]&1) {\r
509 maxw = 328; maxcolc = 40;\r
510 } else {\r
511 maxw = 264; maxcolc = 32;\r
512 }\r
513\r
514 // horizontal window?\r
515 if((win=pvid->reg[0x12])) {\r
516 hvwin=1; // hwindow shares display with plane A\r
517 edge=win&0x1f;\r
518 if(win == 0x80) {\r
519 // fullscreen window\r
520 hvwin=4;\r
521 } else if(win < 0x80) {\r
522 // window on the top\r
523 if(edge <= START_ROW) hvwin=0; // window not visible in our drawing region\r
524 else if(edge >= END_ROW) hvwin=4;\r
525 else planestart = winend = edge;\r
526 } else if(win > 0x80) {\r
527 // window at the bottom\r
528 if(edge >= END_ROW) hvwin=0;\r
529 else planeend = winstart = edge;\r
530 }\r
531 }\r
532\r
533 // check for vertical window, but only if win is not fullscreen\r
534 if(hvwin != 4) {\r
535 win=pvid->reg[0x11];\r
536 edge=win&0x1f;\r
537 if (win&0x80) {\r
538 if(!edge) hvwin=4;\r
539 else if(edge < (maxcolc>>1)) {\r
540 // window is on the right\r
541 hvwin|=2;\r
542 planeend|=edge<<17;\r
543 winstart|=edge<<17;\r
544 winend|=maxcolc<<16;\r
545 }\r
546 } else {\r
547 if(edge >= (maxcolc>>1)) hvwin=4;\r
548 else if(edge) {\r
549 // window is on the left\r
550 hvwin|=2;\r
551 winend|=edge<<17;\r
552 planestart|=edge<<17;\r
553 planeend|=maxcolc<<16;\r
554 }\r
555 }\r
556 }\r
557\r
558 if(hvwin==1) { winend|=maxcolc<<16; planeend|=maxcolc<<16; }\r
559\r
560 currpri = 0;\r
561 DrawLayerFull(1, HighCache2B, START_ROW, (maxcolc<<16)|END_ROW);\r
562 switch(hvwin) {\r
563 case 4:\r
564 // fullscreen window\r
565 DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 0);\r
566 HighCache2A[1] = 0;\r
567 break;\r
568\r
569 case 3:\r
570 // we have plane A and both v and h windows\r
571 DrawLayerFull(0, HighCache2A, planestart, planeend);\r
572 DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 0); // h\r
573 DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 0); // v\r
574 break;\r
575\r
576 case 2:\r
577 case 1:\r
578 // both window and plane A visible, window is vertical XOR horizontal\r
579 DrawLayerFull(0, HighCache2A, planestart, planeend);\r
580 DrawWindowFull(winstart, winend, 0);\r
581 break;\r
582\r
583 default:\r
584 // fullscreen plane A\r
585 DrawLayerFull(0, HighCache2A, START_ROW, (maxcolc<<16)|END_ROW);\r
586 break;\r
587 }\r
588 DrawAllSpritesFull(0, maxw);\r
589\r
590#ifdef USE_CACHE\r
591 if(HighCache2B[1]) DrawTilesFromCacheF(HighCache2B);\r
592 if(HighCache2A[1]) DrawTilesFromCacheF(HighCache2A);\r
593 switch(hvwin) {\r
594 case 4:\r
595 // fullscreen window\r
596 DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 1);\r
597 break;\r
598\r
599 case 3:\r
600 // we have plane A and both v and h windows\r
601 DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 1); // h\r
602 DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 1); // v\r
603 break;\r
604\r
605 case 2:\r
606 case 1:\r
607 // both window and plane A visible, window is vertical XOR horizontal\r
608 DrawWindowFull(winstart, winend, 1);\r
609 break;\r
610 }\r
611#else\r
612 currpri = 1;\r
613 // TODO\r
614#endif\r
615 DrawAllSpritesFull(1, maxw);\r
616}\r
617\r
618\r
619PICO_INTERNAL void PicoFrameFull()\r
620{\r
621 // prepare cram?\r
622 if(PicoPrepareCram) PicoPrepareCram();\r
623\r
624 // Draw screen:\r
625 BackFillFull(Pico.video.reg[7]);\r
626 if (Pico.video.reg[1]&0x40) DrawDisplayFull();\r
627}\r
628\r
fast MegaDrive/MegaCD/32X emulator