draw.c 15 KB

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  1. /*
  2. * PicoDrive
  3. * (C) notaz, 2009,2010
  4. * (C) kub, 2019
  5. *
  6. * This work is licensed under the terms of MAME license.
  7. * See COPYING file in the top-level directory.
  8. */
  9. #include "../pico_int.h"
  10. // BGR555 to native conversion
  11. #if defined(USE_BGR555)
  12. #define PXCONV(t) ((t)&(mr|mg|mb|mp))
  13. #define PXPRIO 0x8000 // prio in MSB
  14. #elif defined(USE_BGR565)
  15. #define PXCONV(t) (((t)&mr) | (((t)&(mg|mb)) << 1) | (((t)&mp) >> 10))
  16. #define PXPRIO 0x0020 // prio in LS green bit
  17. #else // RGB565
  18. #define PXCONV(t) ((((t)&mr) << 11) | (((t)&mg) << 1) | (((t)&(mp|mb)) >> 10))
  19. #define PXPRIO 0x0020 // prio in LS green bit
  20. #endif
  21. int (*PicoScan32xBegin)(unsigned int num);
  22. int (*PicoScan32xEnd)(unsigned int num);
  23. int Pico32xDrawMode;
  24. void *DrawLineDestBase32x;
  25. int DrawLineDestIncrement32x;
  26. static void convert_pal555(int invert_prio)
  27. {
  28. u32 *ps = (void *)Pico32xMem->pal;
  29. u32 *pd = (void *)Pico32xMem->pal_native;
  30. u32 mr = 0x001f001f; // masks for red, green, blue, prio
  31. u32 mg = 0x03e003e0;
  32. u32 mb = 0x7c007c00;
  33. u32 mp = 0x80008000;
  34. u32 inv = 0;
  35. int i;
  36. if (invert_prio)
  37. inv = 0x80008000;
  38. for (i = 0x100/2; i > 0; i--, ps++, pd++) {
  39. u32 t = *ps ^ inv;
  40. *pd = PXCONV(t);
  41. }
  42. Pico32x.dirty_pal = 0;
  43. }
  44. // direct color mode
  45. #define do_line_dc(pd, p32x, pmd, inv, pmd_draw_code) \
  46. { \
  47. const u16 mr = 0x001f; \
  48. const u16 mg = 0x03e0; \
  49. const u16 mb = 0x7c00; \
  50. const u16 mp = 0x0000; \
  51. unsigned short t; \
  52. int i = 320; \
  53. \
  54. while (i > 0) { \
  55. for (; i > 0 && (*pmd & 0x3f) == mdbg; pd++, pmd++, i--) { \
  56. t = *p32x++; \
  57. *pd = PXCONV(t); \
  58. } \
  59. for (; i > 0 && (*pmd & 0x3f) != mdbg; pd++, pmd++, i--) { \
  60. t = *p32x++ ^ inv; \
  61. if (t & 0x8000) \
  62. *pd = PXCONV(t); \
  63. else \
  64. pmd_draw_code; \
  65. } \
  66. } \
  67. }
  68. // packed pixel mode
  69. #define do_line_pp(pd, p32x, pmd, pmd_draw_code) \
  70. { \
  71. unsigned short t; \
  72. int i = 320; \
  73. while (i > 0) { \
  74. for (; i > 0 && (*pmd & 0x3f) == mdbg; pd++, pmd++, i--) { \
  75. t = pal[*(unsigned char *)(MEM_BE2((uintptr_t)(p32x++)))]; \
  76. *pd = t; \
  77. } \
  78. for (; i > 0 && (*pmd & 0x3f) != mdbg; pd++, pmd++, i--) { \
  79. t = pal[*(unsigned char *)(MEM_BE2((uintptr_t)(p32x++)))]; \
  80. if (t & PXPRIO) \
  81. *pd = t; \
  82. else \
  83. pmd_draw_code; \
  84. } \
  85. } \
  86. }
  87. // run length mode
  88. #define do_line_rl(pd, p32x, pmd, pmd_draw_code) \
  89. { \
  90. unsigned short len, t; \
  91. int i; \
  92. for (i = 320; i > 0; p32x++) { \
  93. t = pal[*p32x & 0xff]; \
  94. for (len = (*p32x >> 8) + 1; len > 0 && i > 0; len--, i--, pd++, pmd++) { \
  95. if ((*pmd & 0x3f) == mdbg || (t & PXPRIO)) \
  96. *pd = t; \
  97. else \
  98. pmd_draw_code; \
  99. } \
  100. } \
  101. }
  102. // this is almost never used (Wiz and menu bg gen only)
  103. void FinalizeLine32xRGB555(int sh, int line, struct PicoEState *est)
  104. {
  105. unsigned short *pd = est->DrawLineDest;
  106. unsigned short *pal = Pico32xMem->pal_native;
  107. unsigned char *pmd = est->HighCol + 8;
  108. unsigned short *dram, *p32x;
  109. unsigned char mdbg;
  110. FinalizeLine555(sh, line, est);
  111. if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 0 || // 32x blanking
  112. // XXX: how is 32col mode handled by real hardware?
  113. !(Pico.video.reg[12] & 1) || // 32col mode
  114. (Pico.video.debug_p & PVD_KILL_32X))
  115. {
  116. return;
  117. }
  118. dram = (void *)Pico32xMem->dram[Pico32x.vdp_regs[0x0a/2] & P32XV_FS];
  119. p32x = dram + dram[line];
  120. mdbg = Pico.video.reg[7] & 0x3f;
  121. if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 2) { // Direct Color Mode
  122. int inv_bit = (Pico32x.vdp_regs[0] & P32XV_PRI) ? 0x8000 : 0;
  123. do_line_dc(pd, p32x, pmd, inv_bit,);
  124. return;
  125. }
  126. if (Pico32x.dirty_pal)
  127. convert_pal555(Pico32x.vdp_regs[0] & P32XV_PRI);
  128. if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 1) { // Packed Pixel Mode
  129. unsigned char *p32xb = (void *)p32x;
  130. if (Pico32x.vdp_regs[2 / 2] & P32XV_SFT)
  131. p32xb++;
  132. do_line_pp(pd, p32xb, pmd,);
  133. }
  134. else { // Run Length Mode
  135. do_line_rl(pd, p32x, pmd,);
  136. }
  137. }
  138. #define MD_LAYER_CODE \
  139. *dst = palmd[*pmd]
  140. #define PICOSCAN_PRE \
  141. PicoScan32xBegin(l + (lines_sft_offs & 0xff)); \
  142. dst = Pico.est.DrawLineDest; \
  143. #define PICOSCAN_POST \
  144. PicoScan32xEnd(l + (lines_sft_offs & 0xff)); \
  145. Pico.est.DrawLineDest = (char *)Pico.est.DrawLineDest + DrawLineDestIncrement32x; \
  146. #define make_do_loop(name, pre_code, post_code, md_code) \
  147. /* Direct Color Mode */ \
  148. static void do_loop_dc##name(unsigned short *dst, \
  149. unsigned short *dram, int lines_sft_offs, int mdbg) \
  150. { \
  151. int inv_bit = (Pico32x.vdp_regs[0] & P32XV_PRI) ? 0x8000 : 0; \
  152. unsigned char *pmd = Pico.est.Draw2FB + \
  153. 328 * (lines_sft_offs & 0xff) + 8; \
  154. unsigned short *palmd = Pico.est.HighPal; \
  155. unsigned short *p32x; \
  156. int lines = lines_sft_offs >> 16; \
  157. int l; \
  158. (void)palmd; \
  159. for (l = 0; l < lines; l++, pmd += 8) { \
  160. pre_code; \
  161. p32x = dram + dram[l]; \
  162. do_line_dc(dst, p32x, pmd, inv_bit, md_code); \
  163. post_code; \
  164. dst += DrawLineDestIncrement32x/2 - 320; \
  165. } \
  166. } \
  167. \
  168. /* Packed Pixel Mode */ \
  169. static void do_loop_pp##name(unsigned short *dst, \
  170. unsigned short *dram, int lines_sft_offs, int mdbg) \
  171. { \
  172. unsigned short *pal = Pico32xMem->pal_native; \
  173. unsigned char *pmd = Pico.est.Draw2FB + \
  174. 328 * (lines_sft_offs & 0xff) + 8; \
  175. unsigned short *palmd = Pico.est.HighPal; \
  176. unsigned char *p32x; \
  177. int lines = lines_sft_offs >> 16; \
  178. int l; \
  179. (void)palmd; \
  180. for (l = 0; l < lines; l++, pmd += 8) { \
  181. pre_code; \
  182. p32x = (void *)(dram + dram[l]); \
  183. p32x += (lines_sft_offs >> 8) & 1; \
  184. do_line_pp(dst, p32x, pmd, md_code); \
  185. post_code; \
  186. dst += DrawLineDestIncrement32x/2 - 320; \
  187. } \
  188. } \
  189. \
  190. /* Run Length Mode */ \
  191. static void do_loop_rl##name(unsigned short *dst, \
  192. unsigned short *dram, int lines_sft_offs, int mdbg) \
  193. { \
  194. unsigned short *pal = Pico32xMem->pal_native; \
  195. unsigned char *pmd = Pico.est.Draw2FB + \
  196. 328 * (lines_sft_offs & 0xff) + 8; \
  197. unsigned short *palmd = Pico.est.HighPal; \
  198. unsigned short *p32x; \
  199. int lines = lines_sft_offs >> 16; \
  200. int l; \
  201. (void)palmd; \
  202. for (l = 0; l < lines; l++, pmd += 8) { \
  203. pre_code; \
  204. p32x = dram + dram[l]; \
  205. do_line_rl(dst, p32x, pmd, md_code); \
  206. post_code; \
  207. dst += DrawLineDestIncrement32x/2 - 320; \
  208. } \
  209. }
  210. #ifdef _ASM_32X_DRAW
  211. #undef make_do_loop
  212. #define make_do_loop(name, pre_code, post_code, md_code) \
  213. extern void do_loop_dc##name(unsigned short *dst, \
  214. unsigned short *dram, int lines_offs, int mdbg); \
  215. extern void do_loop_pp##name(unsigned short *dst, \
  216. unsigned short *dram, int lines_offs, int mdbg); \
  217. extern void do_loop_rl##name(unsigned short *dst, \
  218. unsigned short *dram, int lines_offs, int mdbg);
  219. #endif
  220. make_do_loop(,,,)
  221. make_do_loop(_md, , , MD_LAYER_CODE)
  222. make_do_loop(_scan, PICOSCAN_PRE, PICOSCAN_POST, )
  223. make_do_loop(_scan_md, PICOSCAN_PRE, PICOSCAN_POST, MD_LAYER_CODE)
  224. typedef void (*do_loop_func)(unsigned short *dst, unsigned short *dram, int lines, int mdbg);
  225. enum { DO_LOOP, DO_LOOP_MD, DO_LOOP_SCAN, DO_LOOP_MD_SCAN };
  226. static const do_loop_func do_loop_dc_f[] = { do_loop_dc, do_loop_dc_md, do_loop_dc_scan, do_loop_dc_scan_md };
  227. static const do_loop_func do_loop_pp_f[] = { do_loop_pp, do_loop_pp_md, do_loop_pp_scan, do_loop_pp_scan_md };
  228. static const do_loop_func do_loop_rl_f[] = { do_loop_rl, do_loop_rl_md, do_loop_rl_scan, do_loop_rl_scan_md };
  229. void PicoDraw32xLayer(int offs, int lines, int md_bg)
  230. {
  231. int have_scan = PicoScan32xBegin != NULL && PicoScan32xEnd != NULL;
  232. const do_loop_func *do_loop;
  233. unsigned short *dram;
  234. int lines_sft_offs;
  235. int which_func;
  236. Pico.est.DrawLineDest = (char *)DrawLineDestBase32x + offs * DrawLineDestIncrement32x;
  237. Pico.est.DrawLineDestIncr = DrawLineDestIncrement32x;
  238. dram = Pico32xMem->dram[Pico32x.vdp_regs[0x0a/2] & P32XV_FS];
  239. if (Pico32xDrawMode == PDM32X_BOTH)
  240. PicoDrawUpdateHighPal();
  241. if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 2)
  242. {
  243. // Direct Color Mode
  244. do_loop = do_loop_dc_f;
  245. goto do_it;
  246. }
  247. if (Pico32x.dirty_pal)
  248. convert_pal555(Pico32x.vdp_regs[0] & P32XV_PRI);
  249. if ((Pico32x.vdp_regs[0] & P32XV_Mx) == 1)
  250. {
  251. // Packed Pixel Mode
  252. do_loop = do_loop_pp_f;
  253. }
  254. else
  255. {
  256. // Run Length Mode
  257. do_loop = do_loop_rl_f;
  258. }
  259. do_it:
  260. if (Pico32xDrawMode == PDM32X_BOTH)
  261. which_func = have_scan ? DO_LOOP_MD_SCAN : DO_LOOP_MD;
  262. else
  263. which_func = have_scan ? DO_LOOP_SCAN : DO_LOOP;
  264. lines_sft_offs = (lines << 16) | offs;
  265. if (Pico32x.vdp_regs[2 / 2] & P32XV_SFT)
  266. lines_sft_offs |= 1 << 8;
  267. do_loop[which_func](Pico.est.DrawLineDest, dram, lines_sft_offs, md_bg);
  268. }
  269. // mostly unused, games tend to keep 32X layer on
  270. void PicoDraw32xLayerMdOnly(int offs, int lines)
  271. {
  272. int have_scan = PicoScan32xBegin != NULL && PicoScan32xEnd != NULL;
  273. unsigned short *dst = (void *)((char *)DrawLineDestBase32x + offs * DrawLineDestIncrement32x);
  274. unsigned char *pmd = Pico.est.Draw2FB + 328 * offs + 8;
  275. unsigned short *pal = Pico.est.HighPal;
  276. int poffs = 0, plen = 320;
  277. int l, p;
  278. if (!(Pico.video.reg[12] & 1)) {
  279. // 32col mode. for some render modes MD pixel data carries an offset
  280. if (!(PicoIn.opt & POPT_DIS_32C_BORDER))
  281. pmd += 32;
  282. poffs = 32;
  283. plen = 256;
  284. }
  285. PicoDrawUpdateHighPal();
  286. dst += poffs;
  287. for (l = 0; l < lines; l++) {
  288. if (have_scan) {
  289. PicoScan32xBegin(l + offs);
  290. dst = (unsigned short *)Pico.est.DrawLineDest + poffs;
  291. }
  292. for (p = 0; p < plen; p += 4) {
  293. dst[p + 0] = pal[*pmd++];
  294. dst[p + 1] = pal[*pmd++];
  295. dst[p + 2] = pal[*pmd++];
  296. dst[p + 3] = pal[*pmd++];
  297. }
  298. dst = Pico.est.DrawLineDest = (char *)dst + DrawLineDestIncrement32x;
  299. pmd += 328 - plen;
  300. if (have_scan)
  301. PicoScan32xEnd(l + offs);
  302. }
  303. }
  304. void PicoDrawSetOutFormat32x(pdso_t which, int use_32x_line_mode)
  305. {
  306. if (which == PDF_RGB555) {
  307. // CLUT pixels needed as well, for layer priority
  308. PicoDrawSetInternalBuf(Pico.est.Draw2FB, 328);
  309. PicoDrawSetOutBufMD(NULL, 0);
  310. } else {
  311. // store CLUT pixels, same layout as alt renderer
  312. PicoDrawSetInternalBuf(NULL, 0);
  313. PicoDrawSetOutBufMD(Pico.est.Draw2FB, 328);
  314. }
  315. if (use_32x_line_mode)
  316. // we'll draw via FinalizeLine32xRGB555 (rare)
  317. Pico32xDrawMode = PDM32X_OFF;
  318. else
  319. // in RGB555 mode the 32x layer is drawn over the MD layer, in the other
  320. // modes 32x and MD layer are merged together by the 32x renderer
  321. Pico32xDrawMode = (which == PDF_RGB555) ? PDM32X_32X_ONLY : PDM32X_BOTH;
  322. }
  323. void PicoDrawSetOutBuf32X(void *dest, int increment)
  324. {
  325. DrawLineDestBase32x = dest;
  326. DrawLineDestIncrement32x = increment;
  327. // in RGB555 mode this buffer is also used by the MD renderer
  328. if (Pico32xDrawMode != PDM32X_BOTH)
  329. PicoDrawSetOutBufMD(DrawLineDestBase32x, DrawLineDestIncrement32x);
  330. }
  331. // vim:shiftwidth=2:ts=2:expandtab