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1 | // This is part of Pico Library\r |
2 | \r |
6cadc2da |
3 | // (c) Copyright 2007, Grazvydas "notaz" Ignotas\r |
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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 |
efcba75f |
12 | #include "pico_int.h"\r |
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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 |
9112b6ce |
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 |
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29 | \r |
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30 | static int HighCache2A[41*(TILE_ROWS+1)+1+1]; // caches for high layers\r |
31 | static int HighCache2B[41*(TILE_ROWS+1)+1+1];\r |
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32 | \r |
33 | unsigned short *PicoCramHigh=Pico.cram; // pointer to CRAM buff (0x40 shorts), converted to native device color (works only with 16bit for now)\r |
34 | void (*PicoPrepareCram)()=0; // prepares PicoCramHigh for renderer to use\r |
35 | \r |
36 | \r |
37 | // stuff available in asm:\r |
38 | #ifdef _ASM_DRAW_C\r |
39 | void BackFillFull(int reg7);\r |
40 | void DrawLayerFull(int plane, int *hcache, int planestart, int planeend);\r |
41 | void DrawTilesFromCacheF(int *hc);\r |
42 | void DrawWindowFull(int start, int end, int prio);\r |
43 | void DrawSpriteFull(unsigned int *sprite);\r |
44 | #else\r |
45 | \r |
46 | \r |
47 | static int TileXnormYnorm(unsigned char *pd,int addr,unsigned char pal)\r |
48 | {\r |
49 | unsigned int pack=0; unsigned int t=0, blank = 1;\r |
50 | int i;\r |
51 | \r |
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52 | for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {\r |
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53 | pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r |
54 | if(!pack) continue;\r |
55 | \r |
56 | t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);\r |
57 | t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);\r |
58 | t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);\r |
59 | t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t )|pal);\r |
60 | t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);\r |
61 | t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);\r |
62 | t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);\r |
63 | t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);\r |
64 | blank = 0;\r |
65 | }\r |
66 | \r |
67 | return blank; // Tile blank?\r |
68 | }\r |
69 | \r |
70 | static int TileXflipYnorm(unsigned char *pd,int addr,unsigned char pal)\r |
71 | {\r |
72 | unsigned int pack=0; unsigned int t=0, blank = 1;\r |
73 | int i;\r |
74 | \r |
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75 | for(i=8; i; i--, addr+=2, pd += LINE_WIDTH) {\r |
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76 | pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r |
77 | if(!pack) continue;\r |
78 | \r |
79 | t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);\r |
80 | t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);\r |
81 | t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);\r |
82 | t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);\r |
83 | t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t )|pal);\r |
84 | t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);\r |
85 | t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);\r |
86 | t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);\r |
87 | blank = 0;\r |
88 | }\r |
89 | return blank; // Tile blank?\r |
90 | }\r |
91 | \r |
92 | static int TileXnormYflip(unsigned char *pd,int addr,unsigned char pal)\r |
93 | {\r |
94 | unsigned int pack=0; unsigned int t=0, blank = 1;\r |
95 | int i;\r |
96 | \r |
97 | addr+=14;\r |
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98 | for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {\r |
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99 | pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r |
100 | if(!pack) continue;\r |
101 | \r |
102 | t=pack&0x0000f000; if (t) pd[0]=(unsigned char)((t>>12)|pal);\r |
103 | t=pack&0x00000f00; if (t) pd[1]=(unsigned char)((t>> 8)|pal);\r |
104 | t=pack&0x000000f0; if (t) pd[2]=(unsigned char)((t>> 4)|pal);\r |
105 | t=pack&0x0000000f; if (t) pd[3]=(unsigned char)((t )|pal);\r |
106 | t=pack&0xf0000000; if (t) pd[4]=(unsigned char)((t>>28)|pal);\r |
107 | t=pack&0x0f000000; if (t) pd[5]=(unsigned char)((t>>24)|pal);\r |
108 | t=pack&0x00f00000; if (t) pd[6]=(unsigned char)((t>>20)|pal);\r |
109 | t=pack&0x000f0000; if (t) pd[7]=(unsigned char)((t>>16)|pal);\r |
110 | blank = 0;\r |
111 | }\r |
112 | \r |
113 | return blank; // Tile blank?\r |
114 | }\r |
115 | \r |
116 | static int TileXflipYflip(unsigned char *pd,int addr,unsigned char pal)\r |
117 | {\r |
118 | unsigned int pack=0; unsigned int t=0, blank = 1;\r |
119 | int i;\r |
120 | \r |
121 | addr+=14;\r |
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122 | for(i=8; i; i--, addr-=2, pd += LINE_WIDTH) {\r |
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123 | pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r |
124 | if(!pack) continue;\r |
125 | \r |
126 | t=pack&0x000f0000; if (t) pd[0]=(unsigned char)((t>>16)|pal);\r |
127 | t=pack&0x00f00000; if (t) pd[1]=(unsigned char)((t>>20)|pal);\r |
128 | t=pack&0x0f000000; if (t) pd[2]=(unsigned char)((t>>24)|pal);\r |
129 | t=pack&0xf0000000; if (t) pd[3]=(unsigned char)((t>>28)|pal);\r |
130 | t=pack&0x0000000f; if (t) pd[4]=(unsigned char)((t )|pal);\r |
131 | t=pack&0x000000f0; if (t) pd[5]=(unsigned char)((t>> 4)|pal);\r |
132 | t=pack&0x00000f00; if (t) pd[6]=(unsigned char)((t>> 8)|pal);\r |
133 | t=pack&0x0000f000; if (t) pd[7]=(unsigned char)((t>>12)|pal);\r |
134 | blank = 0;\r |
135 | }\r |
136 | return blank; // Tile blank?\r |
137 | }\r |
138 | \r |
139 | \r |
140 | // start: (tile_start<<16)|row_start, end: [same]\r |
141 | static void DrawWindowFull(int start, int end, int prio)\r |
142 | {\r |
143 | struct PicoVideo *pvid=&Pico.video;\r |
144 | int nametab, nametab_step, trow, tilex, blank=-1, code;\r |
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145 | unsigned char *scrpos = PicoDraw2FB;\r |
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146 | int tile_start, tile_end; // in cells\r |
147 | \r |
148 | // parse ranges\r |
149 | tile_start = start>>16;\r |
150 | tile_end = end>>16;\r |
151 | start = start<<16>>16;\r |
152 | end = end<<16>>16;\r |
153 | \r |
154 | // Find name table line:\r |
155 | if (pvid->reg[12]&1)\r |
156 | {\r |
157 | nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode\r |
158 | nametab_step = 1<<6;\r |
159 | }\r |
160 | else\r |
161 | {\r |
162 | nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode\r |
163 | nametab_step = 1<<5;\r |
164 | }\r |
165 | nametab += nametab_step*start;\r |
166 | \r |
167 | // check priority\r |
168 | code=Pico.vram[nametab+tile_start];\r |
169 | if ((code>>15) != prio) return; // hack: just assume that whole window uses same priority\r |
170 | \r |
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171 | scrpos+=8*LINE_WIDTH+8;\r |
172 | scrpos+=8*LINE_WIDTH*(start-START_ROW);\r |
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173 | \r |
174 | // do a window until we reach planestart row\r |
175 | for(trow = start; trow < end; trow++, nametab+=nametab_step) { // current tile row\r |
176 | for (tilex=tile_start; tilex<tile_end; tilex++)\r |
177 | {\r |
178 | int code,addr,zero=0;\r |
179 | // unsigned short *pal=NULL;\r |
180 | unsigned char pal;\r |
181 | \r |
182 | code=Pico.vram[nametab+tilex];\r |
183 | if (code==blank) continue;\r |
184 | \r |
185 | // Get tile address/2:\r |
186 | addr=(code&0x7ff)<<4;\r |
187 | \r |
188 | // pal=PicoCramHigh+((code>>9)&0x30);\r |
189 | pal=(unsigned char)((code>>9)&0x30);\r |
190 | \r |
191 | switch((code>>11)&3) {\r |
192 | case 0: zero=TileXnormYnorm(scrpos+(tilex<<3),addr,pal); break;\r |
193 | case 1: zero=TileXflipYnorm(scrpos+(tilex<<3),addr,pal); break;\r |
194 | case 2: zero=TileXnormYflip(scrpos+(tilex<<3),addr,pal); break;\r |
195 | case 3: zero=TileXflipYflip(scrpos+(tilex<<3),addr,pal); break;\r |
196 | }\r |
197 | if(zero) blank=code; // We know this tile is blank now\r |
198 | }\r |
199 | \r |
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200 | scrpos += LINE_WIDTH*8;\r |
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201 | }\r |
202 | }\r |
203 | \r |
204 | \r |
205 | static void DrawLayerFull(int plane, int *hcache, int planestart, int planeend)\r |
206 | {\r |
207 | struct PicoVideo *pvid=&Pico.video;\r |
208 | static char shift[4]={5,6,6,7}; // 32,64 or 128 sized tilemaps\r |
209 | int width, height, ymask, htab;\r |
210 | int nametab, hscroll=0, vscroll, cells;\r |
211 | unsigned char *scrpos;\r |
212 | int blank=-1, xmask, nametab_row, trow;\r |
213 | \r |
214 | // parse ranges\r |
215 | cells = (planeend>>16)-(planestart>>16);\r |
216 | planestart = planestart<<16>>16;\r |
217 | planeend = planeend<<16>>16;\r |
218 | \r |
219 | // Work out the Tiles to draw\r |
220 | \r |
221 | htab=pvid->reg[13]<<9; // Horizontal scroll table address\r |
222 | // if ( pvid->reg[11]&2) htab+=Scanline<<1; // Offset by line\r |
223 | // if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile\r |
224 | htab+=plane; // A or B\r |
225 | \r |
226 | if(!(pvid->reg[11]&3)) { // full screen scroll\r |
227 | // Get horizontal scroll value\r |
228 | hscroll=Pico.vram[htab&0x7fff];\r |
229 | htab = 0; // this marks that we don't have to update scroll value\r |
230 | }\r |
231 | \r |
232 | // Work out the name table size: 32 64 or 128 tiles (0-3)\r |
233 | width=pvid->reg[16];\r |
234 | height=(width>>4)&3; width&=3;\r |
235 | \r |
236 | xmask=(1<<shift[width ])-1; // X Mask in tiles\r |
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237 | ymask=(height<<5)|0x1f; // Y Mask in tiles\r |
238 | if(width == 1) ymask&=0x3f;\r |
239 | else if(width>1) ymask =0x1f;\r |
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240 | \r |
241 | // Find name table:\r |
242 | if (plane==0) nametab=(pvid->reg[2]&0x38)<< 9; // A\r |
243 | else nametab=(pvid->reg[4]&0x07)<<12; // B\r |
244 | \r |
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245 | scrpos = PicoDraw2FB;\r |
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246 | scrpos+=8*LINE_WIDTH*(planestart-START_ROW);\r |
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247 | \r |
248 | // Get vertical scroll value:\r |
249 | vscroll=Pico.vsram[plane]&0x1ff;\r |
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250 | scrpos+=(8-(vscroll&7))*LINE_WIDTH;\r |
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251 | if(vscroll&7) planeend++; // we have vertically clipped tiles due to vscroll, so we need 1 more row\r |
252 | \r |
253 | *hcache++ = 8-(vscroll&7); // push y-offset to tilecache\r |
254 | \r |
255 | \r |
256 | for(trow = planestart; trow < planeend; trow++) { // current tile row\r |
257 | int cellc=cells,tilex,dx;\r |
258 | \r |
259 | // Find the tile row in the name table\r |
260 | //ts.line=(vscroll+Scanline)&ymask;\r |
261 | //ts.nametab+=(ts.line>>3)<<shift[width];\r |
262 | nametab_row = nametab + (((trow+(vscroll>>3))&ymask)<<shift[width]); // pointer to nametable entries for this row\r |
263 | \r |
264 | // update hscroll if needed\r |
265 | if(htab) {\r |
266 | int htaddr=htab+(trow<<4);\r |
267 | if(trow) htaddr-=(vscroll&7)<<1;\r |
268 | hscroll=Pico.vram[htaddr&0x7fff];\r |
269 | }\r |
270 | \r |
271 | // Draw tiles across screen:\r |
272 | tilex=(-hscroll)>>3;\r |
273 | dx=((hscroll-1)&7)+1;\r |
274 | if(dx != 8) cellc++; // have hscroll, do more cells\r |
275 | \r |
276 | for (; cellc; dx+=8,tilex++,cellc--)\r |
277 | {\r |
278 | int code=0,addr=0,zero=0;\r |
279 | // unsigned short *pal=NULL;\r |
280 | unsigned char pal;\r |
281 | \r |
282 | code=Pico.vram[nametab_row+(tilex&xmask)];\r |
283 | if (code==blank) continue;\r |
284 | \r |
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285 | if (code>>15) { // high priority tile\r |
286 | *hcache++ = code|(dx<<16)|(trow<<27); // cache it\r |
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287 | continue;\r |
288 | }\r |
289 | \r |
290 | // Get tile address/2:\r |
291 | addr=(code&0x7ff)<<4;\r |
292 | \r |
293 | // pal=PicoCramHigh+((code>>9)&0x30);\r |
294 | pal=(unsigned char)((code>>9)&0x30);\r |
295 | \r |
296 | switch((code>>11)&3) {\r |
297 | case 0: zero=TileXnormYnorm(scrpos+dx,addr,pal); break;\r |
298 | case 1: zero=TileXflipYnorm(scrpos+dx,addr,pal); break;\r |
299 | case 2: zero=TileXnormYflip(scrpos+dx,addr,pal); break;\r |
300 | case 3: zero=TileXflipYflip(scrpos+dx,addr,pal); break;\r |
301 | }\r |
302 | if(zero) blank=code; // We know this tile is blank now\r |
303 | }\r |
304 | \r |
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305 | scrpos += LINE_WIDTH*8;\r |
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306 | }\r |
307 | \r |
308 | *hcache = 0; // terminate cache\r |
309 | }\r |
310 | \r |
311 | \r |
312 | static void DrawTilesFromCacheF(int *hc)\r |
313 | {\r |
314 | int code, addr, zero = 0;\r |
315 | unsigned int prevy=0xFFFFFFFF;\r |
316 | // unsigned short *pal;\r |
317 | unsigned char pal;\r |
318 | short blank=-1; // The tile we know is blank\r |
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319 | unsigned char *scrpos = PicoDraw2FB, *pd = 0;\r |
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320 | \r |
321 | // *hcache++ = code|(dx<<16)|(trow<<27); // cache it\r |
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322 | scrpos+=(*hc++)*LINE_WIDTH - START_ROW*LINE_WIDTH*8;\r |
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323 | \r |
324 | while((code=*hc++)) {\r |
325 | if((short)code == blank) continue;\r |
326 | \r |
327 | // y pos\r |
328 | if(((unsigned)code>>27) != prevy) {\r |
329 | prevy = (unsigned)code>>27;\r |
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330 | pd = scrpos + prevy*LINE_WIDTH*8;\r |
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331 | }\r |
332 | \r |
333 | // Get tile address/2:\r |
334 | addr=(code&0x7ff)<<4;\r |
335 | // pal=PicoCramHigh+((code>>9)&0x30);\r |
336 | pal=(unsigned char)((code>>9)&0x30);\r |
337 | \r |
338 | switch((code>>11)&3) {\r |
339 | case 0: zero=TileXnormYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r |
340 | case 1: zero=TileXflipYnorm(pd+((code>>16)&0x1ff),addr,pal); break;\r |
341 | case 2: zero=TileXnormYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r |
342 | case 3: zero=TileXflipYflip(pd+((code>>16)&0x1ff),addr,pal); break;\r |
343 | }\r |
344 | \r |
345 | if(zero) blank=(short)code;\r |
346 | }\r |
347 | }\r |
348 | \r |
349 | \r |
350 | // sx and sy are coords of virtual screen with 8pix borders on top and on left\r |
351 | static void DrawSpriteFull(unsigned int *sprite)\r |
352 | {\r |
353 | int width=0,height=0;\r |
354 | // unsigned short *pal=NULL;\r |
355 | unsigned char pal;\r |
356 | int tile,code,tdeltax,tdeltay;\r |
357 | unsigned char *scrpos;\r |
358 | int sx, sy;\r |
359 | \r |
360 | sy=sprite[0];\r |
361 | height=sy>>24;\r |
362 | sy=(sy&0x1ff)-0x78; // Y\r |
363 | width=(height>>2)&3; height&=3;\r |
364 | width++; height++; // Width and height in tiles\r |
365 | \r |
366 | code=sprite[1];\r |
367 | sx=((code>>16)&0x1ff)-0x78; // X\r |
368 | \r |
369 | tile=code&0x7ff; // Tile number\r |
370 | tdeltax=height; // Delta to increase tile by going right\r |
371 | tdeltay=1; // Delta to increase tile by going down\r |
372 | if (code&0x0800) { tdeltax=-tdeltax; tile+=height*(width-1); } // Flip X\r |
373 | if (code&0x1000) { tdeltay=-tdeltay; tile+=height-1; } // Flip Y\r |
374 | \r |
375 | //delta<<=4; // Delta of address\r |
376 | // pal=PicoCramHigh+((code>>9)&0x30); // Get palette pointer\r |
377 | pal=(unsigned char)((code>>9)&0x30);\r |
378 | \r |
379 | // goto first vertically visible tile\r |
380 | while(sy <= START_ROW*8) { sy+=8; tile+=tdeltay; height--; }\r |
381 | \r |
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382 | scrpos = PicoDraw2FB;\r |
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383 | scrpos+=(sy-START_ROW*8)*LINE_WIDTH;\r |
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384 | \r |
385 | for (; height > 0; height--, sy+=8, tile+=tdeltay)\r |
386 | {\r |
387 | int w = width, x=sx, t=tile;\r |
388 | \r |
389 | if(sy >= END_ROW*8+8) return; // offscreen\r |
390 | \r |
391 | for (; w; w--,x+=8,t+=tdeltax)\r |
392 | {\r |
393 | if(x<=0) continue;\r |
394 | if(x>=328) break; // Offscreen\r |
395 | \r |
396 | t&=0x7fff; // Clip tile address\r |
397 | switch((code>>11)&3) {\r |
398 | case 0: TileXnormYnorm(scrpos+x,t<<4,pal); break;\r |
399 | case 1: TileXflipYnorm(scrpos+x,t<<4,pal); break;\r |
400 | case 2: TileXnormYflip(scrpos+x,t<<4,pal); break;\r |
401 | case 3: TileXflipYflip(scrpos+x,t<<4,pal); break;\r |
402 | }\r |
403 | }\r |
404 | \r |
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405 | scrpos+=8*LINE_WIDTH;\r |
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406 | }\r |
407 | }\r |
408 | #endif\r |
409 | \r |
410 | \r |
411 | static void DrawAllSpritesFull(int prio, int maxwidth)\r |
412 | {\r |
413 | struct PicoVideo *pvid=&Pico.video;\r |
414 | int table=0,maskrange=0;\r |
415 | int i,u,link=0;\r |
416 | unsigned int *sprites[80]; // Sprites\r |
417 | int y_min=START_ROW*8, y_max=END_ROW*8; // for a simple sprite masking\r |
418 | \r |
419 | table=pvid->reg[5]&0x7f;\r |
420 | if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r |
421 | table<<=8; // Get sprite table address/2\r |
422 | \r |
423 | for (i=u=0; u < 80; u++)\r |
424 | {\r |
425 | unsigned int *sprite=NULL;\r |
426 | int code, code2, sx, sy, height;\r |
427 | \r |
428 | sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r |
429 | \r |
430 | // get sprite info\r |
431 | code = sprite[0];\r |
432 | \r |
433 | // check if it is not hidden vertically\r |
434 | sy = (code&0x1ff)-0x80;\r |
435 | height = (((code>>24)&3)+1)<<3;\r |
436 | if(sy+height <= y_min || sy > y_max) goto nextsprite;\r |
437 | \r |
438 | // masking sprite?\r |
439 | code2=sprite[1];\r |
440 | sx = (code2>>16)&0x1ff;\r |
441 | if(!sx) {\r |
442 | int to = sy+height; // sy ~ from\r |
443 | if(maskrange) {\r |
444 | // try to merge with previous range\r |
445 | if((maskrange>>16)+1 >= sy && (maskrange>>16) <= to && (maskrange&0xffff) < sy) sy = (maskrange&0xffff);\r |
446 | else if((maskrange&0xffff)-1 <= to && (maskrange&0xffff) >= sy && (maskrange>>16) > to) to = (maskrange>>16);\r |
447 | }\r |
448 | // support only very simple masking (top and bottom of screen)\r |
449 | if(sy <= y_min && to+1 > y_min) y_min = to+1;\r |
450 | else if(to >= y_max && sy-1 < y_max) y_max = sy-1;\r |
451 | else maskrange=sy|(to<<16);\r |
452 | \r |
453 | goto nextsprite;\r |
454 | }\r |
455 | \r |
456 | // priority\r |
457 | if(((code2>>15)&1) != prio) goto nextsprite; // wrong priority\r |
458 | \r |
459 | // check if sprite is not hidden horizontally\r |
460 | sx -= 0x78; // Get X coordinate + 8\r |
461 | if(sx <= -8*3 || sx >= maxwidth) goto nextsprite;\r |
462 | \r |
463 | // sprite is good, save it's index\r |
464 | sprites[i++]=sprite;\r |
465 | \r |
466 | nextsprite:\r |
467 | // Find next sprite\r |
468 | link=(code>>16)&0x7f;\r |
469 | if(!link) break; // End of sprites\r |
470 | }\r |
471 | \r |
472 | // Go through sprites backwards:\r |
473 | for (i-- ;i>=0; i--)\r |
474 | {\r |
475 | DrawSpriteFull(sprites[i]);\r |
476 | }\r |
477 | }\r |
478 | \r |
479 | #ifndef _ASM_DRAW_C\r |
480 | static void BackFillFull(int reg7)\r |
481 | {\r |
b542be46 |
482 | unsigned int back;\r |
cc68a136 |
483 | \r |
484 | // Start with a background color:\r |
485 | // back=PicoCramHigh[reg7&0x3f];\r |
486 | back=reg7&0x3f;\r |
487 | back|=back<<8;\r |
488 | back|=back<<16;\r |
489 | \r |
b542be46 |
490 | memset32((int *)PicoDraw2FB, back, LINE_WIDTH*(8+(END_ROW-START_ROW)*8)/4);\r |
cc68a136 |
491 | }\r |
492 | #endif\r |
493 | \r |
f579f7b8 |
494 | static void DrawDisplayFull(void)\r |
cc68a136 |
495 | {\r |
496 | struct PicoVideo *pvid=&Pico.video;\r |
497 | int win, edge=0, hvwin=0; // LSb->MSb: hwin&plane, vwin&plane, full\r |
498 | int planestart=START_ROW, planeend=END_ROW; // plane A start/end when window shares display with plane A (in tile rows or columns)\r |
499 | int winstart=START_ROW, winend=END_ROW; // same for window\r |
500 | int maxw, maxcolc; // max width and col cells\r |
501 | \r |
502 | if(pvid->reg[12]&1) {\r |
503 | maxw = 328; maxcolc = 40;\r |
504 | } else {\r |
505 | maxw = 264; maxcolc = 32;\r |
506 | }\r |
507 | \r |
508 | // horizontal window?\r |
f579f7b8 |
509 | if ((win=pvid->reg[0x12]))\r |
510 | {\r |
cc68a136 |
511 | hvwin=1; // hwindow shares display with plane A\r |
512 | edge=win&0x1f;\r |
513 | if(win == 0x80) {\r |
514 | // fullscreen window\r |
515 | hvwin=4;\r |
516 | } else if(win < 0x80) {\r |
517 | // window on the top\r |
518 | if(edge <= START_ROW) hvwin=0; // window not visible in our drawing region\r |
519 | else if(edge >= END_ROW) hvwin=4;\r |
520 | else planestart = winend = edge;\r |
521 | } else if(win > 0x80) {\r |
522 | // window at the bottom\r |
523 | if(edge >= END_ROW) hvwin=0;\r |
524 | else planeend = winstart = edge;\r |
525 | }\r |
526 | }\r |
527 | \r |
528 | // check for vertical window, but only if win is not fullscreen\r |
f579f7b8 |
529 | if (hvwin != 4)\r |
530 | {\r |
cc68a136 |
531 | win=pvid->reg[0x11];\r |
532 | edge=win&0x1f;\r |
533 | if (win&0x80) {\r |
534 | if(!edge) hvwin=4;\r |
535 | else if(edge < (maxcolc>>1)) {\r |
536 | // window is on the right\r |
537 | hvwin|=2;\r |
538 | planeend|=edge<<17;\r |
539 | winstart|=edge<<17;\r |
540 | winend|=maxcolc<<16;\r |
541 | }\r |
542 | } else {\r |
543 | if(edge >= (maxcolc>>1)) hvwin=4;\r |
544 | else if(edge) {\r |
545 | // window is on the left\r |
546 | hvwin|=2;\r |
547 | winend|=edge<<17;\r |
548 | planestart|=edge<<17;\r |
549 | planeend|=maxcolc<<16;\r |
550 | }\r |
551 | }\r |
552 | }\r |
553 | \r |
f579f7b8 |
554 | if (hvwin==1) { winend|=maxcolc<<16; planeend|=maxcolc<<16; }\r |
cc68a136 |
555 | \r |
f579f7b8 |
556 | HighCache2A[1] = HighCache2B[1] = 0;\r |
557 | if (PicoDrawMask & PDRAW_LAYERB_ON)\r |
558 | DrawLayerFull(1, HighCache2B, START_ROW, (maxcolc<<16)|END_ROW);\r |
559 | if (PicoDrawMask & PDRAW_LAYERA_ON) switch (hvwin)\r |
560 | {\r |
cc68a136 |
561 | case 4:\r |
562 | // fullscreen window\r |
563 | DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 0);\r |
cc68a136 |
564 | break;\r |
565 | \r |
566 | case 3:\r |
567 | // we have plane A and both v and h windows\r |
eff55556 |
568 | DrawLayerFull(0, HighCache2A, planestart, planeend);\r |
cc68a136 |
569 | DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 0); // h\r |
570 | DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 0); // v\r |
571 | break;\r |
572 | \r |
573 | case 2:\r |
574 | case 1:\r |
575 | // both window and plane A visible, window is vertical XOR horizontal\r |
eff55556 |
576 | DrawLayerFull(0, HighCache2A, planestart, planeend);\r |
cc68a136 |
577 | DrawWindowFull(winstart, winend, 0);\r |
578 | break;\r |
579 | \r |
580 | default:\r |
581 | // fullscreen plane A\r |
eff55556 |
582 | DrawLayerFull(0, HighCache2A, START_ROW, (maxcolc<<16)|END_ROW);\r |
cc68a136 |
583 | break;\r |
584 | }\r |
f579f7b8 |
585 | if (PicoDrawMask & PDRAW_SPRITES_LOW_ON)\r |
586 | DrawAllSpritesFull(0, maxw);\r |
cc68a136 |
587 | \r |
f579f7b8 |
588 | if (HighCache2B[1]) DrawTilesFromCacheF(HighCache2B);\r |
589 | if (HighCache2A[1]) DrawTilesFromCacheF(HighCache2A);\r |
8cf22667 |
590 | if (PicoDrawMask & PDRAW_LAYERA_ON) switch (hvwin)\r |
f579f7b8 |
591 | {\r |
cc68a136 |
592 | case 4:\r |
593 | // fullscreen window\r |
594 | DrawWindowFull(START_ROW, (maxcolc<<16)|END_ROW, 1);\r |
595 | break;\r |
596 | \r |
597 | case 3:\r |
598 | // we have plane A and both v and h windows\r |
599 | DrawWindowFull( winstart&~0xff0000, (winend&~0xff0000)|(maxcolc<<16), 1); // h\r |
600 | DrawWindowFull((winstart&~0xff)|START_ROW, (winend&~0xff)|END_ROW, 1); // v\r |
601 | break;\r |
602 | \r |
603 | case 2:\r |
604 | case 1:\r |
605 | // both window and plane A visible, window is vertical XOR horizontal\r |
606 | DrawWindowFull(winstart, winend, 1);\r |
607 | break;\r |
608 | }\r |
f579f7b8 |
609 | if (PicoDrawMask & PDRAW_SPRITES_HI_ON)\r |
610 | DrawAllSpritesFull(1, maxw);\r |
cc68a136 |
611 | }\r |
612 | \r |
613 | \r |
eff55556 |
614 | PICO_INTERNAL void PicoFrameFull()\r |
cc68a136 |
615 | {\r |
616 | // prepare cram?\r |
f579f7b8 |
617 | if (PicoPrepareCram) PicoPrepareCram();\r |
cc68a136 |
618 | \r |
619 | // Draw screen:\r |
620 | BackFillFull(Pico.video.reg[7]);\r |
621 | if (Pico.video.reg[1]&0x40) DrawDisplayFull();\r |
622 | }\r |
623 | \r |