draw.c 62 KB

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  1. /*
  2. * line renderer
  3. * (c) Copyright Dave, 2004
  4. * (C) notaz, 2006-2010
  5. * (C) kub, 2019-2020
  6. *
  7. * This work is licensed under the terms of MAME license.
  8. * See COPYING file in the top-level directory.
  9. */
  10. /*
  11. * The renderer has 4 modes now:
  12. * - normal
  13. * - shadow/hilight (s/h)
  14. * - "sonic mode" for midline palette changes (8bit mode only)
  15. * - accurate sprites (AS) [+ s/h]
  16. *
  17. * s/h uses upper bits for both priority and shadow/hilight flags.
  18. * "sonic mode" is autodetected, shadow/hilight is enabled by emulated game.
  19. * AS is enabled by user and takes priority over "sonic mode".
  20. *
  21. * since renderer always draws line in 8bit mode, there are 2 spare bits:
  22. * b \ mode: s/h sonic
  23. * 00 normal pal index
  24. * 01 hilight pal index
  25. * 10 shadow pal index
  26. * 11 hilight|shadow=normal pal index
  27. *
  28. * sprite s/h can only be correctly done after the plane rendering s/h state is
  29. * known since the s/h result changes if there's at least one high prio plane.
  30. * sprite op rendering is deferred until this is known, and hilight is used as
  31. * mark since it can't occur before sprite ops:
  32. * x1 op marker pal index
  33. *
  34. * low prio s/h rendering:
  35. * - plane and non-op sprite pixels have shadow
  36. * - s/h sprite op pixel rendering is marked with hilight (deferred)
  37. * high prio s/h rendering:
  38. * - plane and non-op sprite pixels are normal
  39. * - all s/h sprite op pixels (either marked or high prio) are rendered
  40. *
  41. * not handled properly:
  42. * - high prio s/h sprite op overlapping low prio sprite shows sprite, not A,B,G
  43. * - in debug sprite-masked, transparent high-prio sprite px don't remove shadow
  44. */
  45. #include "pico_int.h"
  46. #define FORCE // layer forcing via debug register?
  47. int (*PicoScanBegin)(unsigned int num) = NULL;
  48. int (*PicoScanEnd) (unsigned int num) = NULL;
  49. static unsigned char DefHighCol[8+320+8];
  50. unsigned char *HighColBase = DefHighCol;
  51. int HighColIncrement;
  52. static u16 DefOutBuff[320*2] ALIGNED(4);
  53. void *DrawLineDestBase = DefOutBuff;
  54. int DrawLineDestIncrement;
  55. static u32 HighCacheA[41*2+1]; // caches for high layers
  56. static u32 HighCacheB[41*2+1];
  57. static u32 HighPreSpr[80*2+1]; // slightly preprocessed sprites
  58. u32 VdpSATCache[128]; // VDP sprite cache (1st 32 sprite attr bits)
  59. // NB don't change any defines without checking their usage in ASM
  60. #if defined(USE_BGR555)
  61. #define PXCONV(t) ((t & 0x000e000e)<< 1) | ((t & 0x00e000e0)<<2) | ((t & 0x0e000e00)<<3)
  62. #define PXMASKL 0x04210421 // 0x0c630c63, LSB for all colours
  63. #define PXMASKH 0x39ce39ce // 0x3def3def, all but MSB for all colours
  64. #else // RGB565
  65. #define PXCONV(t) ((t & 0x000e000e)<<12) | ((t & 0x00e000e0)<<3) | ((t & 0x0e000e00)>>7)
  66. #define PXMASKL 0x08610861 // 0x18e318e3
  67. #define PXMASKH 0x738e738e // 0x7bef7bef
  68. #endif
  69. #define LF_PLANE (1 << 0) // must be = 1
  70. #define LF_SH (1 << 1) // must be = 2
  71. //#define LF_FORCE (1 << 2)
  72. #define LF_PLANE_A 0
  73. #define LF_PLANE_B 1
  74. #define SPRL_HAVE_HI 0x80 // have hi priority sprites
  75. #define SPRL_HAVE_LO 0x40 // *lo*
  76. #define SPRL_MAY_HAVE_OP 0x20 // may have operator sprites on the line
  77. #define SPRL_LO_ABOVE_HI 0x10 // low priority sprites may be on top of hi
  78. #define SPRL_HAVE_X 0x08 // have sprites with x != 0
  79. #define SPRL_TILE_OVFL 0x04 // tile limit exceeded on previous line
  80. #define SPRL_HAVE_MASK0 0x02 // have sprite with x == 0 in 1st slot
  81. #define SPRL_MASKED 0x01 // lo prio masking by sprite with x == 0 active
  82. unsigned char HighLnSpr[240][4+MAX_LINE_SPRITES+1]; // sprite_count, ^flags, tile_count, sprites_total, [spritep]..., last_width
  83. int rendstatus_old;
  84. int rendlines;
  85. static int skip_next_line=0;
  86. struct TileStrip
  87. {
  88. int nametab; // Position in VRAM of name table (for this tile line)
  89. int line; // Line number in pixels 0x000-0x3ff within the virtual tilemap
  90. int hscroll; // Horizontal scroll value in pixels for the line
  91. int xmask; // X-Mask (0x1f - 0x7f) for horizontal wraparound in the tilemap
  92. u32 *hc; // cache for high tile codes and their positions
  93. int cells; // cells (tiles) to draw (32 col mode doesn't need to update whole 320)
  94. };
  95. // stuff available in asm:
  96. #ifdef _ASM_DRAW_C
  97. void DrawWindow(int tstart, int tend, int prio, int sh,
  98. struct PicoEState *est);
  99. void DrawAllSprites(unsigned char *sprited, int prio, int sh,
  100. struct PicoEState *est);
  101. void DrawTilesFromCache(u32 *hc, int sh, int rlim,
  102. struct PicoEState *est);
  103. void DrawSpritesSHi(unsigned char *sprited, struct PicoEState *est);
  104. void DrawLayer(int plane_sh, u32 *hcache, int cellskip, int maxcells,
  105. struct PicoEState *est);
  106. void *blockcpy(void *dst, const void *src, size_t n);
  107. void blockcpy_or(void *dst, void *src, size_t n, int pat);
  108. #else
  109. // utility
  110. void blockcpy_or(void *dst, void *src, size_t n, int pat)
  111. {
  112. unsigned char *pd = dst, *ps = src;
  113. for (; n; n--)
  114. *pd++ = (unsigned char) (*ps++ | pat);
  115. }
  116. #define blockcpy memcpy
  117. #endif
  118. #define TileNormMaker_(pix_func,ret) \
  119. { \
  120. unsigned char t; \
  121. \
  122. t = (pack&0x0000f000)>>12; pix_func(0); \
  123. t = (pack&0x00000f00)>> 8; pix_func(1); \
  124. t = (pack&0x000000f0)>> 4; pix_func(2); \
  125. t = (pack&0x0000000f) ; pix_func(3); \
  126. t = (pack&0xf0000000)>>28; pix_func(4); \
  127. t = (pack&0x0f000000)>>24; pix_func(5); \
  128. t = (pack&0x00f00000)>>20; pix_func(6); \
  129. t = (pack&0x000f0000)>>16; pix_func(7); \
  130. return ret; \
  131. }
  132. #define TileFlipMaker_(pix_func,ret) \
  133. { \
  134. unsigned char t; \
  135. \
  136. t = (pack&0x000f0000)>>16; pix_func(0); \
  137. t = (pack&0x00f00000)>>20; pix_func(1); \
  138. t = (pack&0x0f000000)>>24; pix_func(2); \
  139. t = (pack&0xf0000000)>>28; pix_func(3); \
  140. t = (pack&0x0000000f) ; pix_func(4); \
  141. t = (pack&0x000000f0)>> 4; pix_func(5); \
  142. t = (pack&0x00000f00)>> 8; pix_func(6); \
  143. t = (pack&0x0000f000)>>12; pix_func(7); \
  144. return ret; \
  145. }
  146. #define TileNormMaker(funcname, pix_func) \
  147. static void funcname(unsigned char *pd, unsigned int pack, unsigned char pal) \
  148. TileNormMaker_(pix_func,)
  149. #define TileFlipMaker(funcname, pix_func) \
  150. static void funcname(unsigned char *pd, unsigned int pack, unsigned char pal) \
  151. TileFlipMaker_(pix_func,)
  152. #define TileNormMakerAS(funcname, pix_func) \
  153. static unsigned funcname(unsigned m, unsigned char *pd, unsigned int pack, unsigned char pal) \
  154. TileNormMaker_(pix_func,m)
  155. #define TileFlipMakerAS(funcname, pix_func) \
  156. static unsigned funcname(unsigned m, unsigned char *pd, unsigned int pack, unsigned char pal) \
  157. TileFlipMaker_(pix_func,m)
  158. // draw layer or non-s/h sprite pixels (no operator colors)
  159. #define pix_just_write(x) \
  160. if (likely(t)) pd[x]=pal|t
  161. TileNormMaker(TileNorm, pix_just_write)
  162. TileFlipMaker(TileFlip, pix_just_write)
  163. #ifndef _ASM_DRAW_C
  164. // draw low prio sprite non-s/h pixels in s/h mode
  165. #define pix_nonsh(x) \
  166. if (likely(t)) { \
  167. pd[x]=pal|t; \
  168. if (unlikely(t==0xe)) pd[x]&=~0x80; /* disable shadow for color 14 (hw bug?) */ \
  169. }
  170. TileNormMaker(TileNormNonSH, pix_nonsh)
  171. TileFlipMaker(TileFlipNonSH, pix_nonsh)
  172. // draw sprite pixels, process operator colors
  173. #define pix_sh(x) \
  174. if (likely(t)) \
  175. pd[x]=(likely(t<0xe) ? pal|t : pd[x]|((t-1)<<6))
  176. TileNormMaker(TileNormSH, pix_sh)
  177. TileFlipMaker(TileFlipSH, pix_sh)
  178. // draw sprite pixels, mark but don't process operator colors
  179. #define pix_sh_markop(x) \
  180. if (likely(t)) \
  181. pd[x]=(likely(t<0xe) ? pal|t : pd[x]|0x40)
  182. TileNormMaker(TileNormSH_markop, pix_sh_markop)
  183. TileFlipMaker(TileFlipSH_markop, pix_sh_markop)
  184. #endif
  185. // draw low prio sprite operator pixels if visible (i.e. marked)
  186. #define pix_sh_onlyop(x) \
  187. if (unlikely(t>=0xe && (pd[x]&0x40))) \
  188. pd[x]=(pd[x]&~0x40)|((t-1)<<6)
  189. #ifndef _ASM_DRAW_C
  190. TileNormMaker(TileNormSH_onlyop_lp, pix_sh_onlyop)
  191. TileFlipMaker(TileFlipSH_onlyop_lp, pix_sh_onlyop)
  192. #endif
  193. // AS: sprite mask bits in m shifted to bits 8-15, see DrawSpritesHiAS
  194. // draw high prio sprite pixels (AS)
  195. #define pix_as(x) \
  196. if (likely(t && (m & (1<<(x+8))))) \
  197. m &= ~(1<<(x+8)), pd[x] = pal|t
  198. TileNormMakerAS(TileNormAS, pix_as)
  199. TileFlipMakerAS(TileFlipAS, pix_as)
  200. // draw high prio sprite pixels, process operator colors (AS)
  201. // NB sprite+planes: h+s->n, h+[nh]->h, s+[nhs]->s, hence mask h before op
  202. #define pix_sh_as(x) \
  203. if (likely(t && (m & (1<<(x+8))))) { \
  204. m &= ~(1<<(x+8)); \
  205. pd[x]=(likely(t<0xe) ? pal|t : (pd[x]&~0x40)|((t-1)<<6)); \
  206. }
  207. TileNormMakerAS(TileNormSH_AS, pix_sh_as)
  208. TileFlipMakerAS(TileFlipSH_AS, pix_sh_as)
  209. // draw only sprite operator pixels (AS)
  210. #define pix_sh_as_onlyop(x) \
  211. if (likely(t && (m & (1<<(x+8))))) { \
  212. m &= ~(1<<(x+8)); \
  213. pix_sh_onlyop(x); \
  214. }
  215. TileNormMakerAS(TileNormSH_AS_onlyop_lp, pix_sh_as_onlyop)
  216. TileFlipMakerAS(TileFlipSH_AS_onlyop_lp, pix_sh_as_onlyop)
  217. // mark low prio sprite pixels (AS)
  218. #define pix_sh_as_onlymark(x) \
  219. if (likely(t)) m &= ~(1<<(x+8))
  220. TileNormMakerAS(TileNormAS_onlymark, pix_sh_as_onlymark)
  221. TileFlipMakerAS(TileFlipAS_onlymark, pix_sh_as_onlymark)
  222. #ifdef FORCE
  223. // NB s/h already resolved by non-forced drawing
  224. // forced both layer draw (through debug reg)
  225. #define pix_and(x) \
  226. pal |= 0xc0; /* leave s/h bits untouched in pixel "and" */ \
  227. pd[x] &= pal|t
  228. TileNormMaker(TileNorm_and, pix_and)
  229. TileFlipMaker(TileFlip_and, pix_and)
  230. // forced sprite draw (through debug reg)
  231. #define pix_sh_as_and(x) \
  232. pal |= 0xc0; /* leave s/h bits untouched in pixel "and" */ \
  233. if (likely(m & (1<<(x+8)))) { \
  234. m &= ~(1<<(x+8)); \
  235. if (t<0xe) pd[x] &= pal|t; \
  236. }
  237. TileNormMakerAS(TileNormSH_AS_and, pix_sh_as_and)
  238. TileFlipMakerAS(TileFlipSH_AS_and, pix_sh_as_and)
  239. #endif
  240. // --------------------------------------------
  241. #ifndef _ASM_DRAW_C
  242. static void DrawStrip(struct TileStrip *ts, int lflags, int cellskip)
  243. {
  244. unsigned char *pd = Pico.est.HighCol;
  245. u32 *hc = ts->hc;
  246. int tilex, dx, ty, cells;
  247. int oldcode = -1, blank = -1; // The tile we know is blank
  248. unsigned int pal = 0, pack = 0, sh;
  249. // Draw tiles across screen:
  250. sh = (lflags & LF_SH) << 6; // shadow
  251. tilex=((-ts->hscroll)>>3)+cellskip;
  252. ty=(ts->line&7)<<1; // Y-Offset into tile
  253. dx=((ts->hscroll-1)&7)+1;
  254. cells = ts->cells - cellskip;
  255. if(dx != 8) cells++; // have hscroll, need to draw 1 cell more
  256. dx+=cellskip<<3;
  257. // int force = (lflags&LF_FORCE) << 13;
  258. for (; cells > 0; dx+=8, tilex++, cells--)
  259. {
  260. u32 code = PicoMem.vram[ts->nametab + (tilex & ts->xmask)];
  261. // code &= ~force; // forced always draw everything
  262. if (code == blank && !((code & 0x8000) && sh))
  263. continue;
  264. if (code!=oldcode) {
  265. oldcode = code;
  266. pack = 0;
  267. if (code != blank) {
  268. // Get tile address/2:
  269. u32 addr = ((code&0x7ff)<<4) + ty;
  270. if (code & 0x1000) addr ^= 0xe; // Y-flip
  271. pal = ((code>>9)&0x30) | sh; // shadow
  272. pack = *(u32 *)(PicoMem.vram + addr);
  273. if (!pack)
  274. blank = code;
  275. }
  276. }
  277. if (code & 0x8000) { // (un-forced) high priority tile
  278. int cval = code | (dx<<16) | (ty<<25);
  279. if (code & 0x1000) cval ^= 0xe<<25;
  280. *hc++ = cval, *hc++ = pack; // cache it
  281. } else if (code != blank) {
  282. if (code & 0x0800) TileFlip(pd + dx, pack, pal);
  283. else TileNorm(pd + dx, pack, pal);
  284. }
  285. }
  286. // terminate the cache list
  287. *hc = 0;
  288. // if oldcode wasn't changed, it means all layer is hi priority
  289. if (oldcode == -1) Pico.est.rendstatus |= PDRAW_PLANE_HI_PRIO;
  290. }
  291. // this is messy
  292. static void DrawStripVSRam(struct TileStrip *ts, int plane_sh, int cellskip)
  293. {
  294. unsigned char *pd = Pico.est.HighCol;
  295. u32 *hc = ts->hc;
  296. int tilex, dx, ty = 0, addr = 0, cell = 0, nametabadd = 0;
  297. int oldcode = -1, blank = -1; // The tile we know is blank
  298. unsigned int pal = 0, scan = Pico.est.DrawScanline, sh, plane;
  299. // Draw tiles across screen:
  300. sh = (plane_sh & LF_SH) << 6; // shadow
  301. plane = (plane_sh & LF_PLANE); // plane to draw
  302. tilex=(-ts->hscroll)>>3;
  303. dx=((ts->hscroll-1)&7)+1;
  304. if (ts->hscroll & 0x0f) {
  305. int adj = ((ts->hscroll ^ dx) >> 3) & 1;
  306. cell -= adj + 1;
  307. ts->cells -= adj;
  308. PicoMem.vsram[0x3e] = PicoMem.vsram[0x3f] = plane_sh >> 16;
  309. }
  310. cell+=cellskip;
  311. tilex+=cellskip;
  312. dx+=cellskip<<3;
  313. // int force = (plane_sh&LF_FORCE) << 13;
  314. if ((cell&1)==1)
  315. {
  316. int line,vscroll;
  317. vscroll = PicoMem.vsram[plane + (cell&0x3e)];
  318. // Find the line in the name table
  319. line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..
  320. nametabadd=(line>>3)<<(ts->line>>24); // .. and shift[width]
  321. ty=(line&7)<<1; // Y-Offset into tile
  322. }
  323. for (; cell < ts->cells; dx+=8,tilex++,cell++)
  324. {
  325. u32 code, pack;
  326. if ((cell&1)==0)
  327. {
  328. int line,vscroll;
  329. vscroll = PicoMem.vsram[plane + (cell&0x3e)];
  330. // Find the line in the name table
  331. line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..
  332. nametabadd=(line>>3)<<(ts->line>>24); // .. and shift[width]
  333. ty=(line&7)<<1; // Y-Offset into tile
  334. }
  335. code= PicoMem.vram[ts->nametab + nametabadd + (tilex & ts->xmask)];
  336. // code &= ~force; // forced always draw everything
  337. code |= ty<<16; // add ty since that can change pixel row for every 2nd tile
  338. if (code == blank && !((code & 0x8000) && sh))
  339. continue;
  340. if (code!=oldcode) {
  341. oldcode = code;
  342. // Get tile address/2:
  343. addr = (code&0x7ff)<<4;
  344. pal = ((code>>9)&0x30) | sh; // shadow
  345. }
  346. pack = (code & 0x1000 ? ty^0xe : ty); // Y-flip
  347. pack = *(u32 *)(PicoMem.vram + addr+pack);
  348. if (!pack)
  349. blank = code;
  350. if (code & 0x8000) { // (un-forced) high priority tile
  351. int cval = (u16)code | (dx<<16) | (ty<<25);
  352. if (code & 0x1000) cval ^= 0xe<<25;
  353. *hc++ = cval, *hc++ = pack; // cache it
  354. } else if (code != blank) {
  355. if (code & 0x0800) TileFlip(pd + dx, pack, pal);
  356. else TileNorm(pd + dx, pack, pal);
  357. }
  358. }
  359. // terminate the cache list
  360. *hc = 0;
  361. if (oldcode == -1) Pico.est.rendstatus |= PDRAW_PLANE_HI_PRIO;
  362. }
  363. #endif
  364. #ifndef _ASM_DRAW_C
  365. static
  366. #endif
  367. void DrawStripInterlace(struct TileStrip *ts, int plane_sh)
  368. {
  369. unsigned char *pd = Pico.est.HighCol;
  370. u32 *hc = ts->hc;
  371. int tilex = 0, dx = 0, ty = 0, cells;
  372. int oldcode = -1, blank = -1; // The tile we know is blank
  373. unsigned int pal = 0, pack = 0, sh;
  374. // Draw tiles across screen:
  375. sh = (plane_sh & LF_SH) << 6; // shadow
  376. tilex=(-ts->hscroll)>>3;
  377. ty=(ts->line&15)<<1; // Y-Offset into tile
  378. dx=((ts->hscroll-1)&7)+1;
  379. cells = ts->cells;
  380. if(dx != 8) cells++; // have hscroll, need to draw 1 cell more
  381. // int force = (plane_sh&LF_FORCE) << 13;
  382. for (; cells; dx+=8,tilex++,cells--)
  383. {
  384. u32 code = PicoMem.vram[ts->nametab + (tilex & ts->xmask)];
  385. // code &= ~force; // forced always draw everything
  386. if (code == blank && !(code & 0x8000))
  387. continue;
  388. if (code!=oldcode) {
  389. oldcode = code;
  390. pack = 0;
  391. if (code != blank) {
  392. // Get tile address/2:
  393. u32 addr = ((code&0x3ff)<<5) + ty;
  394. if (code & 0x1000) addr ^= 0x1e; // Y-flip
  395. pal = ((code>>9)&0x30) | sh; // shadow
  396. pack = *(u32 *)(PicoMem.vram + addr);
  397. if (!pack)
  398. blank = code;
  399. }
  400. }
  401. if (code & 0x8000) { // high priority tile
  402. if ((plane_sh&LF_SH) | (code!=blank)) {
  403. int cval = (code&0xfc00) | ((code&0x3ff)<<1) | (dx<<16) | (ty<<25);
  404. if (code & 0x1000) cval ^= 0x1e<<25;
  405. *hc++ = cval, *hc++ = pack; // cache it
  406. }
  407. continue;
  408. } else if (code != blank) {
  409. if (code & 0x0800) TileFlip(pd + dx, pack, pal);
  410. else TileNorm(pd + dx, pack, pal);
  411. }
  412. }
  413. // terminate the cache list
  414. *hc = 0;
  415. }
  416. // --------------------------------------------
  417. #ifndef _ASM_DRAW_C
  418. static void DrawLayer(int plane_sh, u32 *hcache, int cellskip, int maxcells,
  419. struct PicoEState *est)
  420. {
  421. struct PicoVideo *pvid=&Pico.video;
  422. const char shift[4]={5,6,5,7}; // 32,64 or 128 sized tilemaps (2 is invalid)
  423. struct TileStrip ts;
  424. int width, height, ymask;
  425. int vscroll, htab;
  426. ts.hc=hcache;
  427. ts.cells=maxcells;
  428. // Work out the TileStrip to draw
  429. // Work out the name table size: 32 64 or 128 tiles (0-3)
  430. width=pvid->reg[16];
  431. height=(width>>4)&3; width&=3;
  432. ts.xmask=(1<<shift[width])-1; // X Mask in tiles (0x1f-0x7f)
  433. ymask=(height<<8)|0xff; // Y Mask in pixels
  434. switch (width) {
  435. case 1: ymask &= 0x1ff; break;
  436. case 2: ymask = 0x007; break;
  437. case 3: ymask = 0x0ff; break;
  438. }
  439. // Find name table:
  440. if (plane_sh&LF_PLANE) ts.nametab=(pvid->reg[4]&0x07)<<12; // B
  441. else ts.nametab=(pvid->reg[2]&0x38)<< 9; // A
  442. htab=pvid->reg[13]<<9; // Horizontal scroll table address
  443. switch (pvid->reg[11]&3) {
  444. case 1: htab += (est->DrawScanline<<1) & 0x0f; break;
  445. case 2: htab += (est->DrawScanline<<1) & ~0x0f; break; // Offset by tile
  446. case 3: htab += (est->DrawScanline<<1); break; // Offset by line
  447. }
  448. htab+=plane_sh&LF_PLANE; // A or B
  449. // Get horizontal scroll value, will be masked later
  450. ts.hscroll = PicoMem.vram[htab & 0x7fff];
  451. if((pvid->reg[12]&6) == 6) {
  452. // interlace mode 2
  453. vscroll = PicoMem.vsram[plane_sh&LF_PLANE]; // Get vertical scroll value
  454. // Find the line in the name table
  455. ts.line=(vscroll+(est->DrawScanline<<1))&((ymask<<1)|1);
  456. ts.nametab+=(ts.line>>4)<<shift[width];
  457. DrawStripInterlace(&ts, plane_sh);
  458. } else if( pvid->reg[11]&4) {
  459. // shit, we have 2-cell column based vscroll
  460. // luckily this doesn't happen too often
  461. ts.line=ymask|(shift[width]<<24); // save some stuff instead of line
  462. // vscroll value for leftmost cells in case of hscroll not on 16px boundary
  463. // XXX it's unclear what exactly the hw is doing. Continue reading where it
  464. // stopped last seems to work best (H40: 0x50 (wrap->0x00), H32 0x40).
  465. plane_sh |= PicoMem.vsram[(pvid->reg[12]&1?0x00:0x20) + (plane_sh&LF_PLANE)] << 16;
  466. DrawStripVSRam(&ts, plane_sh, cellskip);
  467. } else {
  468. vscroll = PicoMem.vsram[plane_sh&LF_PLANE]; // Get vertical scroll value
  469. // Find the line in the name table
  470. ts.line=(vscroll+est->DrawScanline)&ymask;
  471. ts.nametab+=(ts.line>>3)<<shift[width];
  472. DrawStrip(&ts, plane_sh, cellskip);
  473. }
  474. }
  475. // --------------------------------------------
  476. // tstart & tend are tile pair numbers
  477. static void DrawWindow(int tstart, int tend, int prio, int sh,
  478. struct PicoEState *est)
  479. {
  480. unsigned char *pd = Pico.est.HighCol;
  481. struct PicoVideo *pvid = &Pico.video;
  482. int tilex,ty,nametab,code=0;
  483. int blank=-1; // The tile we know is blank
  484. // Find name table line:
  485. if (pvid->reg[12]&1)
  486. {
  487. nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode
  488. nametab+=(est->DrawScanline>>3)<<6;
  489. }
  490. else
  491. {
  492. nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode
  493. nametab+=(est->DrawScanline>>3)<<5;
  494. }
  495. tilex=tstart<<1;
  496. if (prio && !(est->rendstatus & PDRAW_WND_DIFF_PRIO)) {
  497. // all tiles processed in low prio pass
  498. return;
  499. }
  500. tend<<=1;
  501. ty=(est->DrawScanline&7)<<1; // Y-Offset into tile
  502. // Draw tiles across screen:
  503. if (!sh)
  504. {
  505. for (; tilex < tend; tilex++)
  506. {
  507. unsigned int pack;
  508. int dx, addr;
  509. int pal;
  510. code = PicoMem.vram[nametab + tilex];
  511. if ((code>>15) != prio) {
  512. est->rendstatus |= PDRAW_WND_DIFF_PRIO;
  513. continue;
  514. }
  515. if (code==blank) continue;
  516. // Get tile address/2:
  517. addr=(code&0x7ff)<<4;
  518. if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
  519. pack = *(u32 *)(PicoMem.vram + addr);
  520. if (!pack) {
  521. blank = code;
  522. continue;
  523. }
  524. pal = ((code >> 9) & 0x30);
  525. dx = 8 + (tilex << 3);
  526. if (code & 0x0800) TileFlip(pd + dx, pack, pal);
  527. else TileNorm(pd + dx, pack, pal);
  528. }
  529. }
  530. else
  531. {
  532. for (; tilex < tend; tilex++)
  533. {
  534. unsigned int pack;
  535. int dx, addr;
  536. int pal;
  537. code = PicoMem.vram[nametab + tilex];
  538. if((code>>15) != prio) {
  539. est->rendstatus |= PDRAW_WND_DIFF_PRIO;
  540. continue;
  541. }
  542. pal=((code>>9)&0x30);
  543. if (prio) {
  544. int *zb = (int *)(est->HighCol+8+(tilex<<3));
  545. *zb++ &= 0x7f7f7f7f;
  546. *zb &= 0x7f7f7f7f;
  547. } else {
  548. pal |= 0x80;
  549. }
  550. if(code==blank) continue;
  551. // Get tile address/2:
  552. addr=(code&0x7ff)<<4;
  553. if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
  554. pack = *(u32 *)(PicoMem.vram + addr);
  555. if (!pack) {
  556. blank = code;
  557. continue;
  558. }
  559. dx = 8 + (tilex << 3);
  560. if (code & 0x0800) TileFlip(pd + dx, pack, pal);
  561. else TileNorm(pd + dx, pack, pal);
  562. }
  563. }
  564. }
  565. // --------------------------------------------
  566. static void DrawTilesFromCacheShPrep(void)
  567. {
  568. // as some layer has covered whole line with hi priority tiles,
  569. // we can process whole line and then act as if sh/hi mode was off,
  570. // but leave lo pri op sprite markers alone
  571. int c = 320/4, *zb = (int *)(Pico.est.HighCol+8);
  572. Pico.est.rendstatus |= PDRAW_SHHI_DONE;
  573. while (c--)
  574. {
  575. *zb++ &= 0x7f7f7f7f;
  576. }
  577. }
  578. static void DrawTilesFromCache(u32 *hc, int sh, int rlim, struct PicoEState *est)
  579. {
  580. unsigned char *pd = Pico.est.HighCol;
  581. int code, dx;
  582. unsigned int pack;
  583. int pal;
  584. // *ts->hc++ = code | (dx<<16) | (ty<<25); // cache it
  585. if (sh && (est->rendstatus & (PDRAW_SHHI_DONE|PDRAW_PLANE_HI_PRIO)))
  586. {
  587. if (!(est->rendstatus & PDRAW_SHHI_DONE))
  588. DrawTilesFromCacheShPrep();
  589. sh = 0;
  590. }
  591. if (!sh)
  592. {
  593. while ((code=*hc++)) {
  594. pack = *hc++;
  595. if (!pack)
  596. continue;
  597. dx = (code >> 16) & 0x1ff;
  598. pal = ((code >> 9) & 0x30);
  599. if (rlim-dx < 0)
  600. goto last_cut_tile;
  601. if (code & 0x0800) TileFlip(pd + dx, pack, pal);
  602. else TileNorm(pd + dx, pack, pal);
  603. }
  604. }
  605. else
  606. {
  607. while ((code=*hc++)) {
  608. unsigned char *zb;
  609. dx = (code >> 16) & 0x1ff;
  610. zb = est->HighCol+dx;
  611. *zb++ &= 0x7f; *zb++ &= 0x7f; *zb++ &= 0x7f; *zb++ &= 0x7f;
  612. *zb++ &= 0x7f; *zb++ &= 0x7f; *zb++ &= 0x7f; *zb++ &= 0x7f;
  613. pack = *hc++;
  614. if (!pack)
  615. continue;
  616. pal = ((code >> 9) & 0x30);
  617. if (rlim - dx < 0)
  618. goto last_cut_tile;
  619. if (code & 0x0800) TileFlip(pd + dx, pack, pal);
  620. else TileNorm(pd + dx, pack, pal);
  621. }
  622. }
  623. return;
  624. last_cut_tile:
  625. // for vertical window cutoff
  626. {
  627. unsigned int t;
  628. pd += dx;
  629. if (code&0x0800)
  630. {
  631. switch (rlim-dx+8)
  632. {
  633. case 7: t=pack&0x00000f00; if (t) pd[6]=(unsigned char)(pal|(t>> 8)); // "break" is left out intentionally
  634. case 6: t=pack&0x000000f0; if (t) pd[5]=(unsigned char)(pal|(t>> 4));
  635. case 5: t=pack&0x0000000f; if (t) pd[4]=(unsigned char)(pal|(t ));
  636. case 4: t=pack&0xf0000000; if (t) pd[3]=(unsigned char)(pal|(t>>28));
  637. case 3: t=pack&0x0f000000; if (t) pd[2]=(unsigned char)(pal|(t>>24));
  638. case 2: t=pack&0x00f00000; if (t) pd[1]=(unsigned char)(pal|(t>>20));
  639. case 1: t=pack&0x000f0000; if (t) pd[0]=(unsigned char)(pal|(t>>16));
  640. default: break;
  641. }
  642. }
  643. else
  644. {
  645. switch (rlim-dx+8)
  646. {
  647. case 7: t=pack&0x00f00000; if (t) pd[6]=(unsigned char)(pal|(t>>20));
  648. case 6: t=pack&0x0f000000; if (t) pd[5]=(unsigned char)(pal|(t>>24));
  649. case 5: t=pack&0xf0000000; if (t) pd[4]=(unsigned char)(pal|(t>>28));
  650. case 4: t=pack&0x0000000f; if (t) pd[3]=(unsigned char)(pal|(t ));
  651. case 3: t=pack&0x000000f0; if (t) pd[2]=(unsigned char)(pal|(t>> 4));
  652. case 2: t=pack&0x00000f00; if (t) pd[1]=(unsigned char)(pal|(t>> 8));
  653. case 1: t=pack&0x0000f000; if (t) pd[0]=(unsigned char)(pal|(t>>12));
  654. default: break;
  655. }
  656. }
  657. }
  658. }
  659. // --------------------------------------------
  660. // Index + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size
  661. // Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
  662. static void DrawSprite(u32 *sprite, int sh, int w)
  663. {
  664. void (*fTileFunc)(unsigned char *pd, unsigned int pack, unsigned char pal);
  665. unsigned char *pd = Pico.est.HighCol;
  666. int width=0,height=0;
  667. int row=0;
  668. u32 code=0;
  669. int pal;
  670. int tile=0,delta=0;
  671. int sx, sy;
  672. // parse the sprite data
  673. sy=sprite[0];
  674. code=sprite[1];
  675. sx=code>>16; // X
  676. width=sy>>28;
  677. height=(sy>>24)&7; // Width and height in tiles
  678. sy=(sy<<16)>>16; // Y
  679. row=Pico.est.DrawScanline-sy; // Row of the sprite we are on
  680. if (code&0x1000) row=(height<<3)-1-row; // Flip Y
  681. tile=code + (row>>3); // Tile number increases going down
  682. delta=height; // Delta to increase tile by going right
  683. if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
  684. tile &= 0x7ff; tile<<=4; tile+=(row&7)<<1; // Tile address
  685. delta<<=4; // Delta of address
  686. pal=(code>>9)&0x30;
  687. pal|=sh<<7; // shadow
  688. if (sh && (code&0x6000) == 0x6000) {
  689. if(code&0x0800) fTileFunc=TileFlipSH_markop;
  690. else fTileFunc=TileNormSH_markop;
  691. } else if (sh) {
  692. if(code&0x0800) fTileFunc=TileFlipNonSH;
  693. else fTileFunc=TileNormNonSH;
  694. } else {
  695. if(code&0x0800) fTileFunc=TileFlip;
  696. else fTileFunc=TileNorm;
  697. }
  698. if (w) width = w; // tile limit
  699. for (; width; width--,sx+=8,tile+=delta)
  700. {
  701. unsigned int pack;
  702. if(sx<=0) continue;
  703. if(sx>=328) break; // Offscreen
  704. pack = *(u32 *)(PicoMem.vram + (tile & 0x7fff));
  705. fTileFunc(pd + sx, pack, pal);
  706. }
  707. }
  708. #endif
  709. static void DrawSpriteInterlace(unsigned int *sprite)
  710. {
  711. unsigned char *pd = Pico.est.HighCol;
  712. int width=0,height=0;
  713. int row=0,code=0;
  714. int pal;
  715. int tile=0,delta=0;
  716. int sx, sy;
  717. // parse the sprite data
  718. sy=sprite[0];
  719. height=sy>>24;
  720. sy=(sy&0x3ff)-0x100; // Y
  721. width=(height>>2)&3; height&=3;
  722. width++; height++; // Width and height in tiles
  723. row=(Pico.est.DrawScanline<<1)-sy; // Row of the sprite we are on
  724. code=sprite[1];
  725. sx=((code>>16)&0x1ff)-0x78; // X
  726. if (code&0x1000) row^=(16<<height)-1; // Flip Y
  727. tile=code&0x3ff; // Tile number
  728. tile+=row>>4; // Tile number increases going down
  729. delta=height; // Delta to increase tile by going right
  730. if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
  731. tile<<=5; tile+=(row&15)<<1; // Tile address
  732. delta<<=5; // Delta of address
  733. pal=((code>>9)&0x30); // Get palette pointer
  734. for (; width; width--,sx+=8,tile+=delta)
  735. {
  736. unsigned int pack;
  737. if(sx<=0) continue;
  738. if(sx>=328) break; // Offscreen
  739. pack = *(u32 *)(PicoMem.vram + (tile & 0x7fff));
  740. if (code & 0x0800) TileFlip(pd + sx, pack, pal);
  741. else TileNorm(pd + sx, pack, pal);
  742. }
  743. }
  744. static NOINLINE void DrawAllSpritesInterlace(int pri, int sh)
  745. {
  746. struct PicoVideo *pvid=&Pico.video;
  747. int i,u,table,link=0,sline=Pico.est.DrawScanline<<1;
  748. unsigned int *sprites[80]; // Sprite index
  749. int max_sprites = Pico.video.reg[12]&1 ? 80 : 64;
  750. table=pvid->reg[5]&0x7f;
  751. if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode
  752. table<<=8; // Get sprite table address/2
  753. for (i = u = 0; u < max_sprites && link < max_sprites; u++)
  754. {
  755. unsigned int *sprite;
  756. int code, sx, sy, height;
  757. sprite=(u32 *)(PicoMem.vram+((table+(link<<2))&0x7ffc)); // Find sprite
  758. // get sprite info
  759. code = sprite[0];
  760. sx = sprite[1];
  761. if(((sx>>15)&1) != pri) goto nextsprite; // wrong priority sprite
  762. // check if it is on this line
  763. sy = (code&0x3ff)-0x100;
  764. height = (((code>>24)&3)+1)<<4;
  765. if((sline < sy) | (sline >= sy+height)) goto nextsprite; // no
  766. // check if sprite is not hidden offscreen
  767. sx = (sx>>16)&0x1ff;
  768. sx -= 0x78; // Get X coordinate + 8
  769. if((sx <= -8*3) | (sx >= 328)) goto nextsprite;
  770. // sprite is good, save it's pointer
  771. sprites[i++]=sprite;
  772. nextsprite:
  773. // Find next sprite
  774. link=(code>>16)&0x7f;
  775. if(!link) break; // End of sprites
  776. }
  777. // Go through sprites backwards:
  778. for (i-- ;i>=0; i--)
  779. DrawSpriteInterlace(sprites[i]);
  780. }
  781. #ifndef _ASM_DRAW_C
  782. /*
  783. * s/h drawing: lo_layers|40, lo_sprites|40 && mark_op,
  784. * hi_layers&=~40, hi_sprites
  785. *
  786. * Index + 0 : hhhhvvvv ----hhvv yyyyyyyy yyyyyyyy // v, h: vert./horiz. size
  787. * Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
  788. */
  789. static void DrawSpritesSHi(unsigned char *sprited, const struct PicoEState *est)
  790. {
  791. static void (*tilefuncs[2][2][2])(unsigned char *, unsigned, unsigned char) = {
  792. { {NULL, NULL}, {TileNorm, TileFlip} },
  793. { {TileNormSH_onlyop_lp, TileFlipSH_onlyop_lp}, {TileNormSH, TileFlipSH} }
  794. }; // [sh?][hi?][flip?]
  795. void (*fTileFunc)(unsigned char *pd, unsigned int pack, unsigned char pal);
  796. unsigned char *pd = Pico.est.HighCol;
  797. unsigned char *p;
  798. int cnt, w;
  799. cnt = sprited[0] & 0x7f;
  800. if (cnt == 0) return;
  801. p = &sprited[4];
  802. if ((sprited[1] & (SPRL_TILE_OVFL|SPRL_HAVE_MASK0)) == (SPRL_TILE_OVFL|SPRL_HAVE_MASK0))
  803. return; // masking effective due to tile overflow
  804. // Go through sprites backwards:
  805. w = p[cnt]; // possibly clipped width of last sprite
  806. for (cnt--; cnt >= 0; cnt--, w = 0)
  807. {
  808. u32 *sprite, code;
  809. int pal, tile, sx, sy;
  810. int offs, delta, width, height, row;
  811. offs = (p[cnt] & 0x7f) * 2;
  812. sprite = est->HighPreSpr + offs;
  813. code = sprite[1];
  814. pal = (code>>9)&0x30;
  815. fTileFunc = tilefuncs[pal == 0x30][!!(code & 0x8000)][!!(code & 0x800)];
  816. if (fTileFunc == NULL) continue; // non-operator low sprite, already drawn
  817. // parse remaining sprite data
  818. sy=sprite[0];
  819. sx=code>>16; // X
  820. width=sy>>28;
  821. height=(sy>>24)&7; // Width and height in tiles
  822. sy=(sy<<16)>>16; // Y
  823. row=est->DrawScanline-sy; // Row of the sprite we are on
  824. if (code&0x1000) row=(height<<3)-1-row; // Flip Y
  825. tile=code + (row>>3); // Tile number increases going down
  826. delta=height; // Delta to increase tile by going right
  827. if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
  828. tile &= 0x7ff; tile<<=4; tile+=(row&7)<<1; // Tile address
  829. delta<<=4; // Delta of address
  830. if (w) width = w; // tile limit
  831. for (; width; width--,sx+=8,tile+=delta)
  832. {
  833. unsigned int pack;
  834. if(sx<=0) continue;
  835. if(sx>=328) break; // Offscreen
  836. pack = *(u32 *)(PicoMem.vram + (tile & 0x7fff));
  837. fTileFunc(pd + sx, pack, pal);
  838. }
  839. }
  840. }
  841. #endif // !_ASM_DRAW_C
  842. static void DrawSpritesHiAS(unsigned char *sprited, int sh)
  843. {
  844. static unsigned (*tilefuncs[2][2][2])(unsigned, unsigned char *, unsigned, unsigned char) = {
  845. { {TileNormAS_onlymark, TileFlipAS_onlymark}, {TileNormAS, TileFlipAS} },
  846. { {TileNormSH_AS_onlyop_lp, TileFlipSH_AS_onlyop_lp}, {TileNormSH_AS, TileFlipSH_AS} }
  847. }; // [sh?][hi?][flip?]
  848. unsigned (*fTileFunc)(unsigned m, unsigned char *pd, unsigned int pack, unsigned char pal);
  849. unsigned char *pd = Pico.est.HighCol;
  850. unsigned char mb[sizeof(DefHighCol)/8];
  851. unsigned char *p, *mp;
  852. unsigned m;
  853. int entry, cnt;
  854. cnt = sprited[0] & 0x7f;
  855. if (cnt == 0) return;
  856. memset(mb, 0xff, sizeof(mb));
  857. p = &sprited[4];
  858. if ((sprited[1] & (SPRL_TILE_OVFL|SPRL_HAVE_MASK0)) == (SPRL_TILE_OVFL|SPRL_HAVE_MASK0))
  859. return; // masking effective due to tile overflow
  860. // Go through sprites:
  861. for (entry = 0; entry < cnt; entry++)
  862. {
  863. u32 *sprite, code;
  864. int pal, tile, sx, sy;
  865. int offs, delta, width, height, row;
  866. offs = (p[entry] & 0x7f) * 2;
  867. sprite = HighPreSpr + offs;
  868. code = sprite[1];
  869. pal = (code>>9)&0x30;
  870. fTileFunc = tilefuncs[(sh && pal == 0x30)][!!(code&0x8000)][!!(code&0x800)];
  871. // parse remaining sprite data
  872. sy=sprite[0];
  873. sx=code>>16; // X
  874. width=sy>>28;
  875. height=(sy>>24)&7; // Width and height in tiles
  876. sy=(sy<<16)>>16; // Y
  877. row=Pico.est.DrawScanline-sy; // Row of the sprite we are on
  878. if (code&0x1000) row=(height<<3)-1-row; // Flip Y
  879. tile=code + (row>>3); // Tile number increases going down
  880. delta=height; // Delta to increase tile by going right
  881. if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
  882. tile &= 0x7ff; tile<<=4; tile+=(row&7)<<1; // Tile address
  883. delta<<=4; // Delta of address
  884. if (entry+1 == cnt) width = p[entry+1]; // last sprite width limited?
  885. while (sx <= 0 && width) width--, sx+=8, tile+=delta; // Offscreen
  886. mp = mb+(sx>>3);
  887. for (m = *mp; width; width--, sx+=8, tile+=delta, *mp++ = m, m >>= 8)
  888. {
  889. unsigned int pack;
  890. if(sx>=328) break; // Offscreen
  891. pack = *(u32 *)(PicoMem.vram + (tile & 0x7fff));
  892. m |= mp[1] << 8; // next mask byte
  893. // shift mask bits to bits 8-15 for easier load/store handling
  894. m = fTileFunc(m << (8-(sx&0x7)), pd + sx, pack, pal) >> (8-(sx&0x7));
  895. }
  896. *mp = m; // write last mask byte
  897. }
  898. }
  899. #ifdef FORCE
  900. // NB lots of duplicate code, all for the sake of a small performance gain.
  901. static void DrawStripForced(struct TileStrip *ts, int cellskip)
  902. {
  903. unsigned char *pd = Pico.est.HighCol;
  904. int tilex, dx, ty, code=0, addr=0, cells;
  905. int oldcode = -1;
  906. int pal = 0;
  907. // Draw tiles across screen:
  908. tilex=((-ts->hscroll)>>3)+cellskip;
  909. ty=(ts->line&7)<<1; // Y-Offset into tile
  910. dx=((ts->hscroll-1)&7)+1;
  911. cells = ts->cells - cellskip;
  912. if(dx != 8) cells++; // have hscroll, need to draw 1 cell more
  913. dx+=cellskip<<3;
  914. for (; cells > 0; dx+=8, tilex++, cells--)
  915. {
  916. unsigned int pack;
  917. code = PicoMem.vram[ts->nametab + (tilex & ts->xmask)];
  918. if (code!=oldcode) {
  919. oldcode = code;
  920. // Get tile address/2:
  921. addr = ((code&0x7ff)<<4) + ty;
  922. if (code & 0x1000) addr^=0xe; // Y-flip
  923. pal = (code>>9)&0x30;
  924. }
  925. pack = *(u32 *)(PicoMem.vram + addr);
  926. if (code & 0x0800) TileFlip_and(pd + dx, pack, pal);
  927. else TileNorm_and(pd + dx, pack, pal);
  928. }
  929. }
  930. static void DrawStripVSRamForced(struct TileStrip *ts, int plane_sh, int cellskip)
  931. {
  932. unsigned char *pd = Pico.est.HighCol;
  933. int tilex, dx, ty=0, code=0, addr=0, cell=0, nametabadd=0;
  934. int oldcode=-1;
  935. int pal=0, scan=Pico.est.DrawScanline, plane;
  936. // Draw tiles across screen:
  937. plane = plane_sh & LF_PLANE;
  938. tilex=(-ts->hscroll)>>3;
  939. dx=((ts->hscroll-1)&7)+1;
  940. if (ts->hscroll & 0x0f) {
  941. int adj = ((ts->hscroll ^ dx) >> 3) & 1;
  942. cell -= adj + 1;
  943. ts->cells -= adj;
  944. PicoMem.vsram[0x3e] = PicoMem.vsram[0x3f] = plane_sh >> 16;
  945. }
  946. cell+=cellskip;
  947. tilex+=cellskip;
  948. dx+=cellskip<<3;
  949. if ((cell&1)==1)
  950. {
  951. int line,vscroll;
  952. vscroll = PicoMem.vsram[plane + (cell&0x3e)];
  953. // Find the line in the name table
  954. line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..
  955. nametabadd=(line>>3)<<(ts->line>>24); // .. and shift[width]
  956. ty=(line&7)<<1; // Y-Offset into tile
  957. }
  958. for (; cell < ts->cells; dx+=8,tilex++,cell++)
  959. {
  960. unsigned int pack;
  961. if ((cell&1)==0)
  962. {
  963. int line,vscroll;
  964. vscroll = PicoMem.vsram[plane + (cell&0x3e)];
  965. // Find the line in the name table
  966. line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..
  967. nametabadd=(line>>3)<<(ts->line>>24); // .. and shift[width]
  968. ty=(line&7)<<1; // Y-Offset into tile
  969. }
  970. code=PicoMem.vram[ts->nametab+nametabadd+(tilex&ts->xmask)];
  971. if (code!=oldcode) {
  972. oldcode = code;
  973. // Get tile address/2:
  974. addr=(code&0x7ff)<<4;
  975. pal = (code>>9)&0x30; // shadow
  976. }
  977. pack = code & 0x1000 ? ty^0xe : ty; // Y-flip
  978. pack = *(u32 *)(PicoMem.vram + addr+pack);
  979. if (code & 0x0800) TileFlip_and(pd + dx, pack, pal);
  980. else TileNorm_and(pd + dx, pack, pal);
  981. }
  982. }
  983. void DrawStripInterlaceForced(struct TileStrip *ts)
  984. {
  985. unsigned char *pd = Pico.est.HighCol;
  986. int tilex = 0, dx = 0, ty = 0, cells;
  987. int oldcode = -1;
  988. unsigned int pal = 0, pack = 0;
  989. // Draw tiles across screen:
  990. tilex=(-ts->hscroll)>>3;
  991. ty=(ts->line&15)<<1; // Y-Offset into tile
  992. dx=((ts->hscroll-1)&7)+1;
  993. cells = ts->cells;
  994. if(dx != 8) cells++; // have hscroll, need to draw 1 cell more
  995. for (; cells; dx+=8,tilex++,cells--)
  996. {
  997. u32 code = PicoMem.vram[ts->nametab + (tilex & ts->xmask)];
  998. if (code!=oldcode) {
  999. oldcode = code;
  1000. // Get tile address/2:
  1001. u32 addr = ((code&0x3ff)<<5) + ty;
  1002. if (code & 0x1000) addr ^= 0x1e; // Y-flip
  1003. pal = (code>>9)&0x30; // shadow
  1004. pack = *(u32 *)(PicoMem.vram + addr);
  1005. }
  1006. if (code & 0x0800) TileFlip_and(pd + dx, pack, pal);
  1007. else TileNorm_and(pd + dx, pack, pal);
  1008. }
  1009. }
  1010. // XXX only duplicated to avoid ARM asm hassles
  1011. static void DrawLayerForced(int plane_sh, int cellskip, int maxcells,
  1012. struct PicoEState *est)
  1013. {
  1014. struct PicoVideo *pvid=&Pico.video;
  1015. const char shift[4]={5,6,5,7}; // 32,64 or 128 sized tilemaps (2 is invalid)
  1016. struct TileStrip ts;
  1017. int width, height, ymask;
  1018. int vscroll, htab;
  1019. ts.cells=maxcells;
  1020. // Work out the TileStrip to draw
  1021. // Work out the name table size: 32 64 or 128 tiles (0-3)
  1022. width=pvid->reg[16];
  1023. height=(width>>4)&3; width&=3;
  1024. ts.xmask=(1<<shift[width])-1; // X Mask in tiles (0x1f-0x7f)
  1025. ymask=(height<<8)|0xff; // Y Mask in pixels
  1026. switch (width) {
  1027. case 1: ymask &= 0x1ff; break;
  1028. case 2: ymask = 0x007; break;
  1029. case 3: ymask = 0x0ff; break;
  1030. }
  1031. // Find name table:
  1032. if (plane_sh&1) ts.nametab=(pvid->reg[4]&0x07)<<12; // B
  1033. else ts.nametab=(pvid->reg[2]&0x38)<< 9; // A
  1034. htab=pvid->reg[13]<<9; // Horizontal scroll table address
  1035. switch (pvid->reg[11]&3) {
  1036. case 1: htab += (est->DrawScanline<<1) & 0x0f; break;
  1037. case 2: htab += (est->DrawScanline<<1) & ~0x0f; break; // Offset by tile
  1038. case 3: htab += (est->DrawScanline<<1); break; // Offset by line
  1039. }
  1040. htab+=plane_sh&1; // A or B
  1041. // Get horizontal scroll value, will be masked later
  1042. ts.hscroll = PicoMem.vram[htab & 0x7fff];
  1043. if((pvid->reg[12]&6) == 6) {
  1044. // interlace mode 2
  1045. vscroll = PicoMem.vsram[plane_sh & 1]; // Get vertical scroll value
  1046. // Find the line in the name table
  1047. ts.line=(vscroll+(est->DrawScanline<<1))&((ymask<<1)|1);
  1048. ts.nametab+=(ts.line>>4)<<shift[width];
  1049. DrawStripInterlaceForced(&ts);
  1050. } else if( pvid->reg[11]&4) {
  1051. // shit, we have 2-cell column based vscroll
  1052. // luckily this doesn't happen too often
  1053. ts.line=ymask|(shift[width]<<24); // save some stuff instead of line
  1054. // vscroll value for leftmost cells in case of hscroll not on 16px boundary
  1055. // XXX it's unclear what exactly the hw is doing. Continue reading where it
  1056. // stopped last seems to work best (H40: 0x50 (wrap->0x00), H32 0x40).
  1057. plane_sh |= PicoMem.vsram[(pvid->reg[12]&1?0x00:0x20) + (plane_sh&1)] << 16;
  1058. DrawStripVSRamForced(&ts, plane_sh, cellskip);
  1059. } else {
  1060. vscroll = PicoMem.vsram[plane_sh & 1]; // Get vertical scroll value
  1061. // Find the line in the name table
  1062. ts.line=(vscroll+est->DrawScanline)&ymask;
  1063. ts.nametab+=(ts.line>>3)<<shift[width];
  1064. DrawStripForced(&ts, cellskip);
  1065. }
  1066. }
  1067. static void DrawSpritesForced(unsigned char *sprited)
  1068. {
  1069. unsigned (*fTileFunc)(unsigned m, unsigned char *pd, unsigned int pack, unsigned char pal);
  1070. unsigned char *pd = Pico.est.HighCol;
  1071. unsigned char mb[sizeof(DefHighCol)/8];
  1072. unsigned char *p, *mp;
  1073. unsigned m;
  1074. int entry, cnt;
  1075. cnt = sprited[0] & 0x7f;
  1076. if (cnt == 0) { memset(pd, 0, sizeof(DefHighCol)); return; }
  1077. memset(mb, 0xff, sizeof(mb));
  1078. p = &sprited[4];
  1079. if ((sprited[1] & (SPRL_TILE_OVFL|SPRL_HAVE_MASK0)) == (SPRL_TILE_OVFL|SPRL_HAVE_MASK0))
  1080. return; // masking effective due to tile overflow
  1081. // Go through sprites:
  1082. for (entry = 0; entry < cnt; entry++)
  1083. {
  1084. u32 *sprite, code;
  1085. int pal, tile, sx, sy;
  1086. int offs, delta, width, height, row;
  1087. offs = (p[entry] & 0x7f) * 2;
  1088. sprite = HighPreSpr + offs;
  1089. code = sprite[1];
  1090. pal = (code>>9)&0x30;
  1091. if (code&0x800) fTileFunc = TileFlipSH_AS_and;
  1092. else fTileFunc = TileNormSH_AS_and;
  1093. // parse remaining sprite data
  1094. sy=sprite[0];
  1095. sx=code>>16; // X
  1096. width=sy>>28;
  1097. height=(sy>>24)&7; // Width and height in tiles
  1098. sy=(sy<<16)>>16; // Y
  1099. row=Pico.est.DrawScanline-sy; // Row of the sprite we are on
  1100. if (code&0x1000) row=(height<<3)-1-row; // Flip Y
  1101. tile=code + (row>>3); // Tile number increases going down
  1102. delta=height; // Delta to increase tile by going right
  1103. if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
  1104. tile &= 0x7ff; tile<<=4; tile+=(row&7)<<1; // Tile address
  1105. delta<<=4; // Delta of address
  1106. if (entry+1 == cnt) width = p[entry+1]; // last sprite width limited?
  1107. while (sx <= 0 && width) width--, sx+=8, tile+=delta; // Offscreen
  1108. mp = mb+(sx>>3);
  1109. for (m = *mp; width; width--, sx+=8, tile+=delta, *mp++ = m, m >>= 8)
  1110. {
  1111. unsigned int pack;
  1112. if(sx>=328) break; // Offscreen
  1113. pack = *(u32 *)(PicoMem.vram + (tile & 0x7fff));
  1114. m |= mp[1] << 8; // next mask byte
  1115. // shift mask bits to bits 8-15 for easier load/store handling
  1116. m = fTileFunc(m << (8-(sx&0x7)), pd + sx, pack, pal) >> (8-(sx&0x7));
  1117. }
  1118. *mp = m; // write last mask byte
  1119. }
  1120. // anything not covered by a sprite is off (XXX or bg?)
  1121. for (cnt = 1; cnt < sizeof(mb)-1; cnt++)
  1122. if (mb[cnt] == 0xff) {
  1123. *(u32 *)(pd+8*cnt+0) = 0;
  1124. *(u32 *)(pd+8*cnt+4) = 0;
  1125. } else if (mb[cnt])
  1126. for (m = 0; m < 8; m++)
  1127. if (mb[cnt] & (1<<m))
  1128. pd[8*cnt+m] = 0;
  1129. }
  1130. #endif
  1131. // Index + 0 : ----hhvv -lllllll -------y yyyyyyyy
  1132. // Index + 4 : -------x xxxxxxxx pccvhnnn nnnnnnnn
  1133. // v
  1134. // Index + 0 : hhhhvvvv ----hhvv yyyyyyyy yyyyyyyy // v, h: vert./horiz. size
  1135. // Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
  1136. static NOINLINE void PrepareSprites(int max_lines)
  1137. {
  1138. const struct PicoVideo *pvid=&Pico.video;
  1139. const struct PicoEState *est=&Pico.est;
  1140. int u,link=0,sh;
  1141. int table=0;
  1142. u32 *pd = HighPreSpr;
  1143. int max_sprites = 80, max_width = 328;
  1144. int max_line_sprites = 20; // 20 sprites, 40 tiles
  1145. if (!(Pico.video.reg[12]&1))
  1146. max_sprites = 64, max_line_sprites = 16, max_width = 264;
  1147. if (PicoIn.opt & POPT_DIS_SPRITE_LIM)
  1148. max_line_sprites = MAX_LINE_SPRITES;
  1149. sh = Pico.video.reg[0xC]&8; // shadow/hilight?
  1150. table=pvid->reg[5]&0x7f;
  1151. if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode
  1152. table<<=8; // Get sprite table address/2
  1153. for (u = est->DrawScanline; u < max_lines; u++)
  1154. *((int *)&HighLnSpr[u][0]) = 0;
  1155. for (u = 0; u < max_sprites && link < max_sprites; u++)
  1156. {
  1157. unsigned int *sprite;
  1158. int code, code2, sx, sy, hv, height, width;
  1159. sprite=(u32 *)(PicoMem.vram+((table+(link<<2))&0x7ffc)); // Find sprite
  1160. // parse sprite info. the 1st half comes from the VDPs internal cache,
  1161. // the 2nd half is read from VRAM
  1162. code = VdpSATCache[link]; // normally but not always equal to sprite[0]
  1163. sy = (code&0x1ff)-0x80;
  1164. hv = (code>>24)&0xf;
  1165. height = (hv&3)+1;
  1166. width = (hv>>2)+1;
  1167. code2 = sprite[1];
  1168. sx = (code2>>16)&0x1ff;
  1169. sx -= 0x78; // Get X coordinate + 8
  1170. if (sy < max_lines && sy + (height<<3) >= est->DrawScanline) // sprite onscreen (y)?
  1171. {
  1172. int entry, y, w, sx_min, onscr_x, maybe_op = 0;
  1173. sx_min = 8-(width<<3);
  1174. onscr_x = sx_min < sx && sx < max_width;
  1175. if (sh && (code2 & 0x6000) == 0x6000)
  1176. maybe_op = SPRL_MAY_HAVE_OP;
  1177. entry = ((pd - HighPreSpr) / 2) | ((code2>>8)&0x80);
  1178. y = (sy >= est->DrawScanline) ? sy : est->DrawScanline;
  1179. for (; y < sy + (height<<3) && y < max_lines; y++)
  1180. {
  1181. unsigned char *p = &HighLnSpr[y][0];
  1182. int cnt = p[0];
  1183. if (p[3] >= max_line_sprites) continue; // sprite limit?
  1184. if (p[1] & SPRL_MASKED) continue; // masked?
  1185. w = width;
  1186. if (p[2] + width > max_line_sprites*2) { // tile limit?
  1187. if (y+1 < 240) HighLnSpr[y+1][1] |= SPRL_TILE_OVFL;
  1188. if (p[2] >= max_line_sprites*2) continue;
  1189. w = max_line_sprites*2 - p[2];
  1190. }
  1191. p[2] += w;
  1192. p[3] ++;
  1193. if (sx == -0x78) {
  1194. if (p[1] & (SPRL_HAVE_X|SPRL_TILE_OVFL))
  1195. p[1] |= SPRL_MASKED; // masked, no more sprites for this line
  1196. if (!(p[1] & SPRL_HAVE_X) && cnt == 0)
  1197. p[1] |= SPRL_HAVE_MASK0; // 1st sprite is masking
  1198. } else
  1199. p[1] |= SPRL_HAVE_X;
  1200. if (!onscr_x) continue; // offscreen x
  1201. p[4+cnt] = entry;
  1202. p[5+cnt] = w; // width clipped by tile limit for sprite renderer
  1203. p[0] = cnt + 1;
  1204. p[1] |= (entry & 0x80) ? SPRL_HAVE_HI : SPRL_HAVE_LO;
  1205. p[1] |= maybe_op; // there might be op sprites on this line
  1206. if (cnt > 0 && (code2 & 0x8000) && !(p[4+cnt-1]&0x80))
  1207. p[1] |= SPRL_LO_ABOVE_HI;
  1208. }
  1209. }
  1210. *pd++ = (width<<28)|(height<<24)|(hv<<16)|((unsigned short)sy);
  1211. *pd++ = (sx<<16)|((unsigned short)code2);
  1212. // Find next sprite
  1213. link=(code>>16)&0x7f;
  1214. if (!link) break; // End of sprites
  1215. }
  1216. *pd = 0;
  1217. #if 0
  1218. for (u = 0; u < max_lines; u++)
  1219. {
  1220. int y;
  1221. printf("c%03i: f %x c %2i/%2i w %2i: ", u, HighLnSpr[u][1],
  1222. HighLnSpr[u][0], HighLnSpr[u][3], HighLnSpr[u][2]);
  1223. for (y = 0; y < HighLnSpr[u][0]; y++) {
  1224. int *sp = HighPreSpr + (HighLnSpr[u][y+4]&0x7f) * 2;
  1225. printf(" %i(%x/%x)", HighLnSpr[u][y+4],sp[0],sp[1]);
  1226. }
  1227. printf("\n");
  1228. }
  1229. #endif
  1230. }
  1231. #ifndef _ASM_DRAW_C
  1232. static void DrawAllSprites(unsigned char *sprited, int prio, int sh,
  1233. struct PicoEState *est)
  1234. {
  1235. unsigned char *p;
  1236. int cnt, w;
  1237. cnt = sprited[0] & 0x7f;
  1238. if (cnt == 0) return;
  1239. p = &sprited[4];
  1240. if ((sprited[1] & (SPRL_TILE_OVFL|SPRL_HAVE_MASK0)) == (SPRL_TILE_OVFL|SPRL_HAVE_MASK0))
  1241. return; // masking effective due to tile overflow
  1242. // Go through sprites backwards:
  1243. w = p[cnt]; // possibly clipped width of last sprite
  1244. for (cnt--; cnt >= 0; cnt--, w = 0)
  1245. {
  1246. u32 *sp = HighPreSpr + (p[cnt]&0x7f) * 2;
  1247. if ((p[cnt] >> 7) != prio) continue;
  1248. DrawSprite(sp, sh, w);
  1249. }
  1250. }
  1251. // --------------------------------------------
  1252. void BackFill(int reg7, int sh, struct PicoEState *est)
  1253. {
  1254. unsigned int back;
  1255. // Start with a blank scanline (background colour):
  1256. back=reg7&0x3f;
  1257. back|=sh<<7; // shadow
  1258. back|=back<<8;
  1259. back|=back<<16;
  1260. memset32((int *)(est->HighCol+8), back, 320/4);
  1261. }
  1262. #endif
  1263. // --------------------------------------------
  1264. void PicoDoHighPal555_8bit(int sh, int line, struct PicoEState *est)
  1265. {
  1266. unsigned int *spal, *dpal;
  1267. unsigned int cnt = (sh ? 1 : est->SonicPalCount+1);
  1268. unsigned int t, i;
  1269. // reset dirty only if there are no outstanding changes
  1270. if (Pico.m.dirtyPal == 2)
  1271. Pico.m.dirtyPal = 0;
  1272. // In Sonic render mode palettes were backuped in SonicPal
  1273. spal = (void *)est->SonicPal;
  1274. dpal = (void *)est->HighPal;
  1275. // additional palettes stored after in-frame changes
  1276. for (i = 0; i < cnt * 0x40 / 2; i++) {
  1277. t = spal[i];
  1278. // treat it like it was 4-bit per channel, since in s/h mode it somewhat is that.
  1279. // otherwise intensity difference between this and s/h will be wrong
  1280. t = PXCONV(t);
  1281. t |= (t >> 4) & PXMASKL;
  1282. dpal[i] = t;
  1283. }
  1284. // norm: xxx0, sh: 0xxx, hi: 0xxx + 7
  1285. if (sh)
  1286. {
  1287. // shadowed pixels
  1288. for (i = 0; i < 0x40 / 2; i++) {
  1289. dpal[0xc0/2 + i] = dpal[i];
  1290. dpal[0x80/2 + i] = (dpal[i] >> 1) & PXMASKH;
  1291. }
  1292. // hilighted pixels
  1293. for (i = 0; i < 0x40 / 2; i++) {
  1294. t = ((dpal[i] >> 1) & PXMASKH) + PXMASKH;
  1295. t |= (t >> 4) & PXMASKL;
  1296. dpal[0x40/2 + i] = t;
  1297. }
  1298. }
  1299. }
  1300. #ifndef _ASM_DRAW_C
  1301. void PicoDoHighPal555(int sh, int line, struct PicoEState *est)
  1302. {
  1303. unsigned int *spal, *dpal;
  1304. unsigned int t, i;
  1305. Pico.m.dirtyPal = 0;
  1306. spal = (void *)PicoMem.cram;
  1307. dpal = (void *)est->HighPal;
  1308. for (i = 0; i < 0x40 / 2; i++) {
  1309. t = spal[i];
  1310. // treat it like it was 4-bit per channel, since in s/h mode it somewhat is that.
  1311. // otherwise intensity difference between this and s/h will be wrong
  1312. t = PXCONV(t);
  1313. t |= (t >> 4) & PXMASKL;
  1314. dpal[i] = dpal[0xc0/2 + i] = t;
  1315. }
  1316. // norm: xxx0, sh: 0xxx, hi: 0xxx + 7
  1317. if (sh)
  1318. {
  1319. // shadowed pixels
  1320. for (i = 0; i < 0x40 / 2; i++)
  1321. dpal[0x80/2 + i] = (dpal[i] >> 1) & PXMASKH;
  1322. // hilighted pixels
  1323. for (i = 0; i < 0x40 / 2; i++) {
  1324. t = ((dpal[i] >> 1) & PXMASKH) + PXMASKH;
  1325. t |= (t >> 4) & PXMASKL;
  1326. dpal[0x40/2 + i] = t;
  1327. }
  1328. }
  1329. }
  1330. void FinalizeLine555(int sh, int line, struct PicoEState *est)
  1331. {
  1332. unsigned short *pd=est->DrawLineDest;
  1333. unsigned char *ps=est->HighCol+8;
  1334. unsigned short *pal=est->HighPal;
  1335. int len;
  1336. PicoDrawUpdateHighPal();
  1337. if (Pico.video.reg[12]&1) {
  1338. len = 320;
  1339. } else {
  1340. if (!(PicoIn.opt&POPT_DIS_32C_BORDER)) pd+=32;
  1341. len = 256;
  1342. }
  1343. {
  1344. #if 1
  1345. int i;
  1346. for (i = len; i > 0; i-=4) {
  1347. *pd++ = pal[*ps++];
  1348. *pd++ = pal[*ps++];
  1349. *pd++ = pal[*ps++];
  1350. *pd++ = pal[*ps++];
  1351. }
  1352. #else
  1353. extern void amips_clut(unsigned short *dst, unsigned char *src, unsigned short *pal, int count);
  1354. extern void amips_clut_6bit(unsigned short *dst, unsigned char *src, unsigned short *pal, int count);
  1355. if (!sh)
  1356. amips_clut_6bit(pd, ps, pal, len);
  1357. else amips_clut(pd, ps, pal, len);
  1358. #endif
  1359. }
  1360. }
  1361. #endif
  1362. static void FinalizeLine8bit(int sh, int line, struct PicoEState *est)
  1363. {
  1364. unsigned char *pd = est->DrawLineDest;
  1365. int len;
  1366. static int dirty_line;
  1367. if (Pico.m.dirtyPal == 1)
  1368. {
  1369. // a hack for mid-frame palette changes
  1370. if (!(est->rendstatus & PDRAW_SONIC_MODE) | (line - dirty_line > 4)) {
  1371. // store a maximum of 2 additional palettes in SonicPal
  1372. if (est->SonicPalCount < 2)
  1373. est->SonicPalCount ++;
  1374. dirty_line = line;
  1375. est->rendstatus |= PDRAW_SONIC_MODE;
  1376. }
  1377. blockcpy(est->SonicPal+est->SonicPalCount*0x40, PicoMem.cram, 0x40*2);
  1378. Pico.m.dirtyPal = 2;
  1379. }
  1380. if (Pico.video.reg[12]&1) {
  1381. len = 320;
  1382. } else {
  1383. if (!(PicoIn.opt & POPT_DIS_32C_BORDER))
  1384. pd += 32;
  1385. len = 256;
  1386. }
  1387. if (DrawLineDestBase == HighColBase) {
  1388. if (!sh && (est->rendstatus & PDRAW_SONIC_MODE))
  1389. blockcpy_or(pd+8, est->HighCol+8, len, est->SonicPalCount*0x40);
  1390. } else if (!sh && (est->rendstatus & PDRAW_SONIC_MODE)) {
  1391. // select active backup palette
  1392. blockcpy_or(pd, est->HighCol+8, len, est->SonicPalCount*0x40);
  1393. } else {
  1394. blockcpy(pd, est->HighCol+8, len);
  1395. }
  1396. }
  1397. static void (*FinalizeLine)(int sh, int line, struct PicoEState *est);
  1398. // --------------------------------------------
  1399. static int DrawDisplay(int sh)
  1400. {
  1401. struct PicoEState *est=&Pico.est;
  1402. unsigned char *sprited = &HighLnSpr[est->DrawScanline][0];
  1403. struct PicoVideo *pvid=&Pico.video;
  1404. int win=0, edge=0, hvwind=0, lflags;
  1405. int maxw, maxcells;
  1406. est->rendstatus &= ~(PDRAW_SHHI_DONE|PDRAW_PLANE_HI_PRIO|PDRAW_WND_DIFF_PRIO);
  1407. if (pvid->reg[12]&1) {
  1408. maxw = 328; maxcells = 40;
  1409. } else {
  1410. maxw = 264; maxcells = 32;
  1411. }
  1412. // Find out if the window is on this line:
  1413. win=pvid->reg[0x12];
  1414. edge=(win&0x1f)<<3;
  1415. if (win&0x80) { if (est->DrawScanline>=edge) hvwind=1; }
  1416. else { if (est->DrawScanline< edge) hvwind=1; }
  1417. if (!hvwind) // we might have a vertical window here
  1418. {
  1419. win=pvid->reg[0x11];
  1420. edge=win&0x1f;
  1421. if (win&0x80) {
  1422. if (!edge) hvwind=1;
  1423. else if(edge < (maxcells>>1)) hvwind=2;
  1424. } else {
  1425. if (!edge);
  1426. else if(edge < (maxcells>>1)) hvwind=2;
  1427. else hvwind=1;
  1428. }
  1429. }
  1430. /* - layer B low - */
  1431. if (!(pvid->debug_p & PVD_KILL_B)) {
  1432. lflags = LF_PLANE_B | (sh<<1);
  1433. DrawLayer(lflags, HighCacheB, 0, maxcells, est);
  1434. }
  1435. /* - layer A low - */
  1436. lflags = LF_PLANE_A | (sh<<1);
  1437. if (pvid->debug_p & PVD_KILL_A)
  1438. ;
  1439. else if (hvwind == 1)
  1440. DrawWindow(0, maxcells>>1, 0, sh, est);
  1441. else if (hvwind == 2) {
  1442. DrawLayer(lflags, HighCacheA, (win&0x80) ? 0 : edge<<1, (win&0x80) ? edge<<1 : maxcells, est);
  1443. DrawWindow( (win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 0, sh, est);
  1444. }
  1445. else
  1446. DrawLayer(lflags, HighCacheA, 0, maxcells, est);
  1447. /* - sprites low - */
  1448. if (pvid->debug_p & PVD_KILL_S_LO)
  1449. ;
  1450. else if (est->rendstatus & PDRAW_INTERLACE)
  1451. DrawAllSpritesInterlace(0, sh);
  1452. else if (sprited[1] & SPRL_HAVE_LO)
  1453. DrawAllSprites(sprited, 0, sh, est);
  1454. /* - layer B hi - */
  1455. if (!(pvid->debug_p & PVD_KILL_B) && HighCacheB[0])
  1456. DrawTilesFromCache(HighCacheB, sh, maxw, est);
  1457. /* - layer A hi - */
  1458. if (pvid->debug_p & PVD_KILL_A)
  1459. ;
  1460. else if (hvwind == 1)
  1461. DrawWindow(0, maxcells>>1, 1, sh, est);
  1462. else if (hvwind == 2) {
  1463. if (HighCacheA[0])
  1464. DrawTilesFromCache(HighCacheA, sh, (win&0x80) ? edge<<4 : maxw, est);
  1465. DrawWindow((win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 1, sh, est);
  1466. } else
  1467. if (HighCacheA[0])
  1468. DrawTilesFromCache(HighCacheA, sh, maxw, est);
  1469. /* - sprites hi - */
  1470. if (pvid->debug_p & PVD_KILL_S_HI)
  1471. ;
  1472. else if (est->rendstatus & PDRAW_INTERLACE)
  1473. DrawAllSpritesInterlace(1, sh);
  1474. // have sprites without layer pri bit ontop of sprites with that bit
  1475. else if ((sprited[1] & SPRL_LO_ABOVE_HI) && (PicoIn.opt & POPT_ACC_SPRITES))
  1476. DrawSpritesHiAS(sprited, sh);
  1477. else if (sh && (sprited[1] & SPRL_MAY_HAVE_OP))
  1478. DrawSpritesSHi(sprited, est);
  1479. else if (sprited[1] & SPRL_HAVE_HI)
  1480. DrawAllSprites(sprited, 1, 0, est);
  1481. #ifdef FORCE
  1482. if (pvid->debug_p & PVD_FORCE_B) {
  1483. lflags = LF_PLANE_B | (sh<<1);
  1484. DrawLayerForced(lflags, 0, maxcells, est);
  1485. } else if (pvid->debug_p & PVD_FORCE_A) {
  1486. lflags = LF_PLANE_A | (sh<<1);
  1487. DrawLayerForced(lflags, 0, maxcells, est);
  1488. } else if (pvid->debug_p & PVD_FORCE_S)
  1489. DrawSpritesForced(sprited);
  1490. #endif
  1491. #if 0
  1492. {
  1493. int *c, a, b;
  1494. for (a = 0, c = HighCacheA; *c; c+=2, a++);
  1495. for (b = 0, c = HighCacheB; *c; c+=2, b++);
  1496. printf("%i:%03i: a=%i, b=%i\n", Pico.m.frame_count,
  1497. Pico.est.DrawScanline, a, b);
  1498. }
  1499. #endif
  1500. return 0;
  1501. }
  1502. // MUST be called every frame
  1503. PICO_INTERNAL void PicoFrameStart(void)
  1504. {
  1505. int offs = 8, lines = 224;
  1506. int dirty = ((Pico.est.rendstatus & PDRAW_SONIC_MODE) || Pico.m.dirtyPal);
  1507. int sprep = Pico.est.rendstatus & (PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES);
  1508. int skipped = Pico.est.rendstatus & PDRAW_SKIP_FRAME;
  1509. // prepare to do this frame
  1510. Pico.est.rendstatus = 0;
  1511. if ((Pico.video.reg[12] & 6) == 6)
  1512. Pico.est.rendstatus |= PDRAW_INTERLACE; // interlace mode
  1513. if (!(Pico.video.reg[12] & 1))
  1514. Pico.est.rendstatus |= PDRAW_32_COLS;
  1515. if (Pico.video.reg[1] & 8) {
  1516. offs = 0;
  1517. lines = 240;
  1518. }
  1519. if (Pico.est.rendstatus != rendstatus_old || lines != rendlines) {
  1520. rendlines = lines;
  1521. // mode_change() might reset rendstatus_old by calling SetColorFormat
  1522. emu_video_mode_change((lines == 240) ? 0 : 8,
  1523. lines, (Pico.video.reg[12] & 1) ? 0 : 1);
  1524. rendstatus_old = Pico.est.rendstatus;
  1525. }
  1526. if (PicoIn.skipFrame) // preserve this until something is rendered at last
  1527. Pico.est.rendstatus |= PDRAW_SKIP_FRAME;
  1528. if (sprep | skipped)
  1529. Pico.est.rendstatus |= PDRAW_PARSE_SPRITES;
  1530. Pico.est.HighCol = HighColBase + offs * HighColIncrement;
  1531. Pico.est.DrawLineDest = (char *)DrawLineDestBase + offs * DrawLineDestIncrement;
  1532. Pico.est.DrawScanline = 0;
  1533. skip_next_line = 0;
  1534. if (FinalizeLine == FinalizeLine8bit) {
  1535. // make a backup of the current palette in case Sonic mode is detected later
  1536. Pico.est.SonicPalCount = 0;
  1537. Pico.m.dirtyPal = (dirty ? 2 : 0); // mark as dirty but already copied
  1538. blockcpy(Pico.est.SonicPal, PicoMem.cram, 0x40*2);
  1539. }
  1540. }
  1541. static void DrawBlankedLine(int line, int offs, int sh, int bgc)
  1542. {
  1543. if (PicoScanBegin != NULL)
  1544. PicoScanBegin(line + offs);
  1545. BackFill(bgc, sh, &Pico.est);
  1546. if (FinalizeLine != NULL)
  1547. FinalizeLine(sh, line, &Pico.est);
  1548. if (PicoScanEnd != NULL)
  1549. PicoScanEnd(line + offs);
  1550. Pico.est.HighCol += HighColIncrement;
  1551. Pico.est.DrawLineDest = (char *)Pico.est.DrawLineDest + DrawLineDestIncrement;
  1552. }
  1553. static void PicoLine(int line, int offs, int sh, int bgc)
  1554. {
  1555. int skip = 0;
  1556. if (skip_next_line > 0) {
  1557. skip_next_line--;
  1558. return;
  1559. }
  1560. Pico.est.DrawScanline = line;
  1561. if (PicoScanBegin != NULL)
  1562. skip = PicoScanBegin(line + offs);
  1563. if (skip) {
  1564. skip_next_line = skip - 1;
  1565. return;
  1566. }
  1567. if (Pico.video.debug_p & (PVD_FORCE_A | PVD_FORCE_B | PVD_FORCE_S))
  1568. bgc = 0x3f;
  1569. // Draw screen:
  1570. BackFill(bgc, sh, &Pico.est);
  1571. if (Pico.video.reg[1]&0x40)
  1572. DrawDisplay(sh);
  1573. if (FinalizeLine != NULL)
  1574. FinalizeLine(sh, line, &Pico.est);
  1575. if (PicoScanEnd != NULL)
  1576. skip_next_line = PicoScanEnd(line + offs);
  1577. Pico.est.HighCol += HighColIncrement;
  1578. Pico.est.DrawLineDest = (char *)Pico.est.DrawLineDest + DrawLineDestIncrement;
  1579. }
  1580. void PicoDrawSync(int to, int blank_last_line)
  1581. {
  1582. struct PicoEState *est = &Pico.est;
  1583. int line, offs = 0;
  1584. int sh = (Pico.video.reg[0xC] & 8) >> 3; // shadow/hilight?
  1585. int bgc = Pico.video.reg[7];
  1586. pprof_start(draw);
  1587. if (rendlines != 240) {
  1588. offs = 8;
  1589. if (to > 223)
  1590. to = 223;
  1591. }
  1592. if (est->DrawScanline <= to - blank_last_line && (est->rendstatus &
  1593. (PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES|PDRAW_PARSE_SPRITES)))
  1594. PrepareSprites(to - blank_last_line + 1);
  1595. for (line = est->DrawScanline; line < to; line++)
  1596. PicoLine(line, offs, sh, bgc);
  1597. // last line
  1598. if (line <= to)
  1599. {
  1600. if (blank_last_line)
  1601. DrawBlankedLine(line, offs, sh, bgc);
  1602. else PicoLine(line, offs, sh, bgc);
  1603. line++;
  1604. }
  1605. est->DrawScanline = line;
  1606. pprof_end(draw);
  1607. }
  1608. // also works for fast renderer
  1609. void PicoDrawUpdateHighPal(void)
  1610. {
  1611. struct PicoEState *est = &Pico.est;
  1612. if (Pico.m.dirtyPal) {
  1613. int sh = (Pico.video.reg[0xC] & 8) >> 3; // shadow/hilight?
  1614. if ((PicoIn.opt & POPT_ALT_RENDERER) | (est->rendstatus & PDRAW_SONIC_MODE))
  1615. sh = 0; // no s/h support
  1616. if (PicoIn.AHW & PAHW_SMS)
  1617. PicoDoHighPal555M4();
  1618. else if (FinalizeLine == FinalizeLine8bit)
  1619. PicoDoHighPal555_8bit(sh, 0, est);
  1620. else
  1621. PicoDoHighPal555(sh, 0, est);
  1622. // cover for sprite priority bits if not in s/h or sonic mode
  1623. if (!sh && !(est->rendstatus & PDRAW_SONIC_MODE)) {
  1624. blockcpy(est->HighPal+0x40, est->HighPal, 0x40*2);
  1625. blockcpy(est->HighPal+0x80, est->HighPal, 0x80*2);
  1626. }
  1627. }
  1628. }
  1629. void PicoDrawSetOutFormat(pdso_t which, int use_32x_line_mode)
  1630. {
  1631. PicoDrawSetInternalBuf(NULL, 0);
  1632. PicoDraw2SetOutBuf(NULL);
  1633. switch (which)
  1634. {
  1635. case PDF_8BIT:
  1636. FinalizeLine = FinalizeLine8bit;
  1637. PicoDrawSetInternalBuf(Pico.est.Draw2FB, 328);
  1638. break;
  1639. case PDF_RGB555:
  1640. if ((PicoIn.AHW & PAHW_32X) && use_32x_line_mode)
  1641. FinalizeLine = FinalizeLine32xRGB555;
  1642. else
  1643. FinalizeLine = FinalizeLine555;
  1644. break;
  1645. default:
  1646. FinalizeLine = NULL;
  1647. break;
  1648. }
  1649. if (PicoIn.AHW & PAHW_32X)
  1650. PicoDrawSetOutFormat32x(which, use_32x_line_mode);
  1651. PicoDrawSetOutputMode4(which);
  1652. rendstatus_old = -1;
  1653. Pico.m.dirtyPal = 1;
  1654. }
  1655. void PicoDrawSetOutBufMD(void *dest, int increment)
  1656. {
  1657. if (FinalizeLine == FinalizeLine8bit && increment == 328) {
  1658. // kludge for no-copy mode
  1659. PicoDrawSetInternalBuf(dest, increment);
  1660. }
  1661. if (FinalizeLine == NULL)
  1662. PicoDraw2SetOutBuf(dest);
  1663. else if (dest != NULL) {
  1664. DrawLineDestBase = dest;
  1665. DrawLineDestIncrement = increment;
  1666. Pico.est.DrawLineDest = (char *)DrawLineDestBase + Pico.est.DrawScanline * increment;
  1667. }
  1668. else {
  1669. DrawLineDestBase = DefOutBuff;
  1670. DrawLineDestIncrement = 0;
  1671. Pico.est.DrawLineDest = DefOutBuff;
  1672. }
  1673. }
  1674. // note: may be called on the middle of frame
  1675. void PicoDrawSetOutBuf(void *dest, int increment)
  1676. {
  1677. if (PicoIn.AHW & PAHW_32X)
  1678. PicoDrawSetOutBuf32X(dest, increment);
  1679. else
  1680. PicoDrawSetOutBufMD(dest, increment);
  1681. }
  1682. void PicoDrawSetInternalBuf(void *dest, int increment)
  1683. {
  1684. if (dest != NULL) {
  1685. HighColBase = dest;
  1686. HighColIncrement = increment;
  1687. Pico.est.HighCol = HighColBase + Pico.est.DrawScanline * increment;
  1688. }
  1689. else {
  1690. HighColBase = DefHighCol;
  1691. HighColIncrement = 0;
  1692. Pico.est.HighCol = DefHighCol;
  1693. }
  1694. }
  1695. void PicoDrawSetCallbacks(int (*begin)(unsigned int num), int (*end)(unsigned int num))
  1696. {
  1697. PicoScanBegin = NULL;
  1698. PicoScanEnd = NULL;
  1699. PicoScan32xBegin = NULL;
  1700. PicoScan32xEnd = NULL;
  1701. if ((PicoIn.AHW & PAHW_32X) && FinalizeLine != FinalizeLine32xRGB555) {
  1702. PicoScan32xBegin = begin;
  1703. PicoScan32xEnd = end;
  1704. }
  1705. else {
  1706. PicoScanBegin = begin;
  1707. PicoScanEnd = end;
  1708. }
  1709. }
  1710. void PicoDrawInit(void)
  1711. {
  1712. Pico.est.DrawLineDest = DefOutBuff;
  1713. Pico.est.HighCol = HighColBase;
  1714. Pico.est.HighPreSpr = HighPreSpr;
  1715. rendstatus_old = -1;
  1716. }
  1717. // vim:ts=2:sw=2:expandtab