1 // This is part of Pico Library
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3 // (c) Copyright 2004 Dave, All rights reserved.
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4 // (c) Copyright 2006-2008 notaz, All rights reserved.
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5 // Free for non-commercial use.
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7 // For commercial use, separate licencing terms must be obtained.
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10 * The renderer has 4 modes now:
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12 * - shadow/hilight (s/h)
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13 * - "sonic mode" for midline palette changes
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14 * - accurate sprites (AS)
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16 * AS and s/h both use upper bits for both priority and shadow/hilight flags.
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17 * "sonic mode" is autodetected, shadow/hilight is enabled by emulated game.
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18 * AS is enabled by user and takes priority over "sonic mode".
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21 #include "PicoInt.h"
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23 int (*PicoScanBegin)(unsigned int num) = NULL;
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24 int (*PicoScanEnd) (unsigned int num) = NULL;
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26 #if OVERRIDE_HIGHCOL
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27 static unsigned char DefHighCol[8+320+8];
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28 unsigned char *HighCol=DefHighCol;
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30 unsigned char HighCol[8+320+8];
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32 unsigned short DefOutBuff[320*2];
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33 void *DrawLineDest=DefOutBuff; // pointer to dest buffer where to draw this line to
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35 static int HighCacheA[41+1]; // caches for high layers
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36 static int HighCacheB[41+1];
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37 static int HighCacheS[80+1]; // and sprites
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38 static int HighPreSpr[80*2+1]; // slightly preprocessed sprites
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39 int *HighCacheS_ptr;
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42 int Scanline = 0; // Scanline
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44 static int SpriteBlocks;
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45 static int skip_next_line=0;
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47 //unsigned short ppt[] = { 0x0f11, 0x0ff1, 0x01f1, 0x011f, 0x01ff, 0x0f1f, 0x0f0e, 0x0e7c };
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49 static void (*DrawAllSpritesLoPri)(int *hcache, int maxwidth, int prio, int sh) = NULL;
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50 static void (*DrawAllSpritesHiPri)(int *hcache, int maxwidth, int prio, int sh) = NULL;
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54 int nametab; // Position in VRAM of name table (for this tile line)
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55 int line; // Line number in pixels 0x000-0x3ff within the virtual tilemap
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56 int hscroll; // Horizontal scroll value in pixels for the line
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57 int xmask; // X-Mask (0x1f - 0x7f) for horizontal wraparound in the tilemap
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58 int *hc; // cache for high tile codes and their positions
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59 int cells; // cells (tiles) to draw (32 col mode doesn't need to update whole 320)
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62 // stuff available in asm:
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64 void DrawWindow(int tstart, int tend, int prio, int sh);
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65 void BackFill(int reg7, int sh);
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66 void DrawSprite(int *sprite, int sh, int as);
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67 void DrawTilesFromCache(int *hc, int sh, int rlim);
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68 void DrawSpritesFromCache(int *hc, int maxwidth, int prio, int sh);
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69 void DrawLayer(int plane_sh, int *hcache, int cellskip, int maxcells);
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70 void FinalizeLineBGR444(int sh);
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71 void FinalizeLineRGB555(int sh);
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72 void *blockcpy(void *dst, const void *src, size_t n);
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73 void blockcpy_or(void *dst, void *src, size_t n, int pat);
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76 void blockcpy_or(void *dst, void *src, size_t n, int pat)
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78 unsigned char *pd = dst, *ps = src;
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80 *pd++ = (unsigned char) (*ps++ | pat);
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82 #define blockcpy memcpy
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86 #define TileNormMaker(funcname,pix_func) \
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87 static int funcname(int sx,int addr,int pal) \
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89 unsigned char *pd = HighCol+sx; \
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90 unsigned int pack=0; unsigned int t=0; \
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92 pack=*(unsigned int *)(Pico.vram+addr); /* Get 8 pixels */ \
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95 t=(pack&0x0000f000)>>12; pix_func(0); \
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96 t=(pack&0x00000f00)>> 8; pix_func(1); \
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97 t=(pack&0x000000f0)>> 4; pix_func(2); \
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98 t=(pack&0x0000000f) ; pix_func(3); \
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99 t=(pack&0xf0000000)>>28; pix_func(4); \
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100 t=(pack&0x0f000000)>>24; pix_func(5); \
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101 t=(pack&0x00f00000)>>20; pix_func(6); \
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102 t=(pack&0x000f0000)>>16; pix_func(7); \
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106 return 1; /* Tile blank */ \
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110 #define TileFlipMaker(funcname,pix_func) \
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111 static int funcname(int sx,int addr,int pal) \
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113 unsigned char *pd = HighCol+sx; \
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114 unsigned int pack=0; unsigned int t=0; \
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116 pack=*(unsigned int *)(Pico.vram+addr); /* Get 8 pixels */ \
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119 t=(pack&0x000f0000)>>16; pix_func(0); \
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120 t=(pack&0x00f00000)>>20; pix_func(1); \
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121 t=(pack&0x0f000000)>>24; pix_func(2); \
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122 t=(pack&0xf0000000)>>28; pix_func(3); \
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123 t=(pack&0x0000000f) ; pix_func(4); \
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124 t=(pack&0x000000f0)>> 4; pix_func(5); \
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125 t=(pack&0x00000f00)>> 8; pix_func(6); \
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126 t=(pack&0x0000f000)>>12; pix_func(7); \
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130 return 1; /* Tile blank */ \
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134 #ifdef _ASM_DRAW_C_AMIPS
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135 int TileNorm(int sx,int addr,int pal);
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136 int TileFlip(int sx,int addr,int pal);
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139 #define pix_just_write(x) \
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142 TileNormMaker(TileNorm,pix_just_write)
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143 TileFlipMaker(TileFlip,pix_just_write)
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147 // draw a sprite pixel, process operator colors
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148 #define pix_sh(x) \
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150 else if (t==0xe) pd[x]=(pd[x]&0x3f)|0x80; /* hilight */ \
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151 else if (t==0xf) pd[x]= pd[x] |0xc0; /* shadow */ \
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154 TileNormMaker(TileNormSH, pix_sh)
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155 TileFlipMaker(TileFlipSH, pix_sh)
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157 #ifndef _ASM_DRAW_C
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158 // draw a sprite pixel ignoring operator colors
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159 #define pix_sh_noop(x) \
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160 if (t && t < 0xe) \
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163 TileNormMaker(TileNormSH_noop, pix_sh_noop)
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164 TileFlipMaker(TileFlipSH_noop, pix_sh_noop)
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167 // process operator pixels only, apply only on low pri tiles
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168 #define pix_sh_onlyop(x) \
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169 if (t==0xe && (pd[x]&0x40)) pd[x]=(pd[x]&0x3f)|0x80; /* hilight */ \
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170 else if (t==0xf && (pd[x]&0x40)) pd[x]= pd[x] |0xc0; /* shadow */
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172 TileNormMaker(TileNormSH_onlyop_lp, pix_sh_onlyop)
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173 TileFlipMaker(TileFlipSH_onlyop_lp, pix_sh_onlyop)
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175 // draw a sprite pixel (AS)
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176 #define pix_as(x) \
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177 if (t && !(pd[x]&0x80)) pd[x]=pal|t
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179 TileNormMaker(TileNormAS, pix_as)
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180 TileFlipMaker(TileFlipAS, pix_as)
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182 // draw a sprite pixel, skip operator colors (AS)
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183 #define pix_sh_as_noop(x) \
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184 if (t && t < 0xe && !(pd[x]&0x80)) pd[x]=pal|t
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186 TileNormMaker(TileNormAS_noop, pix_sh_as_noop)
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187 TileFlipMaker(TileFlipAS_noop, pix_sh_as_noop)
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189 // mark pixel as sprite pixel (AS)
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190 #define pix_sh_as_onlymark(x) \
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193 TileNormMaker(TileNormAS_onlymark, pix_sh_as_onlymark)
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194 TileFlipMaker(TileFlipAS_onlymark, pix_sh_as_onlymark)
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197 // --------------------------------------------
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199 #ifndef _ASM_DRAW_C
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200 static void DrawStrip(struct TileStrip *ts, int plane_sh, int cellskip)
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202 int tilex,dx,ty,code=0,addr=0,cells;
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203 int oldcode=-1,blank=-1; // The tile we know is blank
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206 // Draw tiles across screen:
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207 sh=(plane_sh<<5)&0x40;
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208 tilex=((-ts->hscroll)>>3)+cellskip;
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209 ty=(ts->line&7)<<1; // Y-Offset into tile
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210 dx=((ts->hscroll-1)&7)+1;
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211 cells = ts->cells - cellskip;
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212 if(dx != 8) cells++; // have hscroll, need to draw 1 cell more
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215 for (; cells > 0; dx+=8,tilex++,cells--)
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219 code=Pico.vram[ts->nametab+(tilex&ts->xmask)];
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220 if (code==blank) continue;
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221 if (code>>15) { // high priority tile
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222 int cval = code | (dx<<16) | (ty<<25);
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223 if(code&0x1000) cval^=7<<26;
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224 *ts->hc++ = cval; // cache it
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228 if (code!=oldcode) {
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230 // Get tile address/2:
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231 addr=(code&0x7ff)<<4;
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233 if (code&0x1000) addr^=0xe; // Y-flip
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235 pal=((code>>9)&0x30)|sh;
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238 if (code&0x0800) zero=TileFlip(dx,addr,pal);
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239 else zero=TileNorm(dx,addr,pal);
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241 if (zero) blank=code; // We know this tile is blank now
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244 // terminate the cache list
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246 // if oldcode wasn't changed, it means all layer is hi priority
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247 if (oldcode == -1) rendstatus |= PDRAW_PLANE_HI_PRIO;
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251 void DrawStripVSRam(struct TileStrip *ts, int plane_sh, int cellskip)
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253 int tilex,dx,code=0,addr=0,cell=0;
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254 int oldcode=-1,blank=-1; // The tile we know is blank
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255 int pal=0,scan=Scanline;
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257 // Draw tiles across screen:
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258 tilex=(-ts->hscroll)>>3;
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259 dx=((ts->hscroll-1)&7)+1;
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260 if(dx != 8) cell--; // have hscroll, start with negative cell
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265 for (; cell < ts->cells; dx+=8,tilex++,cell++)
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267 int zero=0,nametabadd,ty;
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272 vscroll=Pico.vsram[(plane_sh&1)+(cell&~1)];
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274 // Find the line in the name table
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275 line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..
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276 nametabadd=(line>>3)<<(ts->line>>24); // .. and shift[width]
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277 ty=(line&7)<<1; // Y-Offset into tile
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280 code=Pico.vram[ts->nametab+nametabadd+(tilex&ts->xmask)];
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281 if (code==blank) continue;
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282 if (code>>15) { // high priority tile
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283 int cval = code | (dx<<16) | (ty<<25);
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284 if(code&0x1000) cval^=7<<26;
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285 *ts->hc++ = cval; // cache it
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289 if (code!=oldcode) {
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291 // Get tile address/2:
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292 addr=(code&0x7ff)<<4;
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293 if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
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295 pal=((code>>9)&0x30)|((plane_sh<<5)&0x40);
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298 if (code&0x0800) zero=TileFlip(dx,addr,pal);
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299 else zero=TileNorm(dx,addr,pal);
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301 if (zero) blank=code; // We know this tile is blank now
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304 // terminate the cache list
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306 if (oldcode == -1) rendstatus |= PDRAW_PLANE_HI_PRIO;
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310 #ifndef _ASM_DRAW_C
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313 void DrawStripInterlace(struct TileStrip *ts)
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315 int tilex=0,dx=0,ty=0,code=0,addr=0,cells;
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316 int oldcode=-1,blank=-1; // The tile we know is blank
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319 // Draw tiles across screen:
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320 tilex=(-ts->hscroll)>>3;
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321 ty=(ts->line&15)<<1; // Y-Offset into tile
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322 dx=((ts->hscroll-1)&7)+1;
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324 if(dx != 8) cells++; // have hscroll, need to draw 1 cell more
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326 for (; cells; dx+=8,tilex++,cells--)
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330 code=Pico.vram[ts->nametab+(tilex&ts->xmask)];
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331 if (code==blank) continue;
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332 if (code>>15) { // high priority tile
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333 int cval = (code&0xfc00) | (dx<<16) | (ty<<25);
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334 cval|=(code&0x3ff)<<1;
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335 if(code&0x1000) cval^=0xf<<26;
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336 *ts->hc++ = cval; // cache it
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340 if (code!=oldcode) {
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342 // Get tile address/2:
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343 addr=(code&0x7ff)<<5;
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344 if (code&0x1000) addr+=30-ty; else addr+=ty; // Y-flip
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346 // pal=Pico.cram+((code>>9)&0x30);
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347 pal=((code>>9)&0x30);
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350 if (code&0x0800) zero=TileFlip(dx,addr,pal);
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351 else zero=TileNorm(dx,addr,pal);
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353 if (zero) blank=code; // We know this tile is blank now
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356 // terminate the cache list
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360 // --------------------------------------------
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362 #ifndef _ASM_DRAW_C
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363 static void DrawLayer(int plane_sh, int *hcache, int cellskip, int maxcells)
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365 struct PicoVideo *pvid=&Pico.video;
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366 const char shift[4]={5,6,5,7}; // 32,64 or 128 sized tilemaps (2 is invalid)
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367 struct TileStrip ts;
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368 int width, height, ymask;
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374 // Work out the TileStrip to draw
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376 // Work out the name table size: 32 64 or 128 tiles (0-3)
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377 width=pvid->reg[16];
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378 height=(width>>4)&3; width&=3;
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380 ts.xmask=(1<<shift[width])-1; // X Mask in tiles (0x1f-0x7f)
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381 ymask=(height<<8)|0xff; // Y Mask in pixels
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382 if(width == 1) ymask&=0x1ff;
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383 else if(width>1) ymask =0x0ff;
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385 // Find name table:
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386 if (plane_sh&1) ts.nametab=(pvid->reg[4]&0x07)<<12; // B
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387 else ts.nametab=(pvid->reg[2]&0x38)<< 9; // A
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389 htab=pvid->reg[13]<<9; // Horizontal scroll table address
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390 if ( pvid->reg[11]&2) htab+=Scanline<<1; // Offset by line
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391 if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile
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392 htab+=plane_sh&1; // A or B
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394 // Get horizontal scroll value, will be masked later
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395 ts.hscroll=Pico.vram[htab&0x7fff];
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397 if((pvid->reg[12]&6) == 6) {
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398 // interlace mode 2
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399 vscroll=Pico.vsram[plane_sh&1]; // Get vertical scroll value
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401 // Find the line in the name table
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402 ts.line=(vscroll+(Scanline<<1))&((ymask<<1)|1);
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403 ts.nametab+=(ts.line>>4)<<shift[width];
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405 DrawStripInterlace(&ts);
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406 } else if( pvid->reg[11]&4) {
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407 // shit, we have 2-cell column based vscroll
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408 // luckily this doesn't happen too often
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409 ts.line=ymask|(shift[width]<<24); // save some stuff instead of line
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410 DrawStripVSRam(&ts, plane_sh, cellskip);
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412 vscroll=Pico.vsram[plane_sh&1]; // Get vertical scroll value
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414 // Find the line in the name table
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415 ts.line=(vscroll+Scanline)&ymask;
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416 ts.nametab+=(ts.line>>3)<<shift[width];
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418 DrawStrip(&ts, plane_sh, cellskip);
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423 // --------------------------------------------
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425 // tstart & tend are tile pair numbers
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426 static void DrawWindow(int tstart, int tend, int prio, int sh) // int *hcache
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428 struct PicoVideo *pvid=&Pico.video;
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429 int tilex,ty,nametab,code=0;
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430 int blank=-1; // The tile we know is blank
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432 // Find name table line:
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433 if (pvid->reg[12]&1)
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435 nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode
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436 nametab+=(Scanline>>3)<<6;
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440 nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode
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441 nametab+=(Scanline>>3)<<5;
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446 if (!(rendstatus & PDRAW_WND_DIFF_PRIO)) {
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447 // check the first tile code
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448 code=Pico.vram[nametab+tilex];
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449 // if the whole window uses same priority (what is often the case), we may be able to skip this field
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450 if ((code>>15) != prio) return;
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454 ty=(Scanline&7)<<1; // Y-Offset into tile
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456 // Draw tiles across screen:
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459 for (; tilex < tend; tilex++)
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464 code=Pico.vram[nametab+tilex];
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465 if (code==blank) continue;
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466 if ((code>>15) != prio) {
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467 rendstatus |= PDRAW_WND_DIFF_PRIO;
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471 pal=((code>>9)&0x30);
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473 // Get tile address/2:
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474 addr=(code&0x7ff)<<4;
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475 if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
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477 if (code&0x0800) zero=TileFlip(8+(tilex<<3),addr,pal);
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478 else zero=TileNorm(8+(tilex<<3),addr,pal);
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480 if (zero) blank=code; // We know this tile is blank now
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485 for (; tilex < tend; tilex++)
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490 code=Pico.vram[nametab+tilex];
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491 if(code==blank) continue;
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492 if((code>>15) != prio) {
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493 rendstatus |= PDRAW_WND_DIFF_PRIO;
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497 pal=((code>>9)&0x30);
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500 int *zb = (int *)(HighCol+8+(tilex<<3));
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501 *zb++ &= 0x3f3f3f3f;
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507 // Get tile address/2:
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508 addr=(code&0x7ff)<<4;
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509 if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
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511 if (code&0x0800) zero=TileFlip(8+(tilex<<3),addr,pal);
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512 else zero=TileNorm(8+(tilex<<3),addr,pal);
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514 if (zero) blank=code; // We know this tile is blank now
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519 // --------------------------------------------
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521 static void DrawTilesFromCacheShPrep(void)
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523 // as some layer has covered whole line with hi priority tiles,
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524 // we can process whole line and then act as if sh/hi mode was off.
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525 int c = 320/4, *zb = (int *)(HighCol+8);
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526 rendstatus |= PDRAW_SHHI_DONE;
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529 *zb++ &= 0x3f3f3f3f;
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533 static void DrawTilesFromCache(int *hc, int sh, int rlim)
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535 int code, addr, dx;
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538 // *ts->hc++ = code | (dx<<16) | (ty<<25); // cache it
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540 if (sh && (rendstatus & (PDRAW_SHHI_DONE|PDRAW_PLANE_HI_PRIO)))
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542 if (!(rendstatus & PDRAW_SHHI_DONE))
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543 DrawTilesFromCacheShPrep();
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549 short blank=-1; // The tile we know is blank
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550 while ((code=*hc++)) {
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552 if((short)code == blank) continue;
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553 // Get tile address/2:
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554 addr=(code&0x7ff)<<4;
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555 addr+=(unsigned int)code>>25; // y offset into tile
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556 dx=(code>>16)&0x1ff;
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558 pal=((code>>9)&0x30);
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559 if (rlim-dx < 0) goto last_cut_tile;
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561 if (code&0x0800) zero=TileFlip(dx,addr,pal);
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562 else zero=TileNorm(dx,addr,pal);
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564 if (zero) blank=(short)code;
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569 while ((code=*hc++)) {
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571 // Get tile address/2:
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572 addr=(code&0x7ff)<<4;
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573 addr+=(unsigned int)code>>25; // y offset into tile
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574 dx=(code>>16)&0x1ff;
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576 *zb++ &= 0x3f; *zb++ &= 0x3f; *zb++ &= 0x3f; *zb++ &= 0x3f;
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577 *zb++ &= 0x3f; *zb++ &= 0x3f; *zb++ &= 0x3f; *zb++ &= 0x3f;
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579 pal=((code>>9)&0x30);
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580 if (rlim-dx < 0) goto last_cut_tile;
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582 if (code&0x0800) TileFlip(dx,addr,pal);
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583 else TileNorm(dx,addr,pal);
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590 unsigned int t, pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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591 unsigned char *pd = HighCol+dx;
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597 case 7: t=pack&0x00000f00; if (t) pd[6]=(unsigned char)(pal|(t>> 8)); // "break" is left out intentionally
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598 case 6: t=pack&0x000000f0; if (t) pd[5]=(unsigned char)(pal|(t>> 4));
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599 case 5: t=pack&0x0000000f; if (t) pd[4]=(unsigned char)(pal|(t ));
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600 case 4: t=pack&0xf0000000; if (t) pd[3]=(unsigned char)(pal|(t>>28));
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601 case 3: t=pack&0x0f000000; if (t) pd[2]=(unsigned char)(pal|(t>>24));
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602 case 2: t=pack&0x00f00000; if (t) pd[1]=(unsigned char)(pal|(t>>20));
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603 case 1: t=pack&0x000f0000; if (t) pd[0]=(unsigned char)(pal|(t>>16));
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611 case 7: t=pack&0x00f00000; if (t) pd[6]=(unsigned char)(pal|(t>>20));
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612 case 6: t=pack&0x0f000000; if (t) pd[5]=(unsigned char)(pal|(t>>24));
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613 case 5: t=pack&0xf0000000; if (t) pd[4]=(unsigned char)(pal|(t>>28));
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614 case 4: t=pack&0x0000000f; if (t) pd[3]=(unsigned char)(pal|(t ));
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615 case 3: t=pack&0x000000f0; if (t) pd[2]=(unsigned char)(pal|(t>> 4));
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616 case 2: t=pack&0x00000f00; if (t) pd[1]=(unsigned char)(pal|(t>> 8));
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617 case 1: t=pack&0x0000f000; if (t) pd[0]=(unsigned char)(pal|(t>>12));
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624 // --------------------------------------------
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626 // Index + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size
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627 // Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
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629 static void DrawSprite(int *sprite, int sh, int as)
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631 int width=0,height=0;
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634 int tile=0,delta=0;
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636 int (*fTileFunc)(int sx,int addr,int pal);
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638 // parse the sprite data
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643 height=(sy>>24)&7; // Width and height in tiles
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644 sy=(sy<<16)>>16; // Y
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646 row=Scanline-sy; // Row of the sprite we are on
\r
648 if (code&0x1000) row=(height<<3)-1-row; // Flip Y
\r
650 tile=code + (row>>3); // Tile number increases going down
\r
651 delta=height; // Delta to increase tile by going right
\r
652 if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
\r
654 tile &= 0x7ff; tile<<=4; tile+=(row&7)<<1; // Tile address
\r
656 pal=(code>>9)&0x30;
\r
658 // assume there will be no sprites with both normal and operator pixels..
\r
659 if ((code&0x8000) || (sh && pal == 0x30) || as) {
\r
660 *HighCacheS_ptr++ = ((code&0x8000)<<16)|(tile<<16)|((code&0x0800)<<5)|((sx<<6)&0x0000ffc0)|pal|((sprite[0]>>16)&0xf);
\r
661 // we need all for accurate sprites, cached will be used to do proper priorities
\r
662 if (!as && (code&0x8000)) return;
\r
665 delta<<=4; // Delta of address
\r
668 if (sh && (code&0x6000) == 0x6000) {
\r
669 if(code&0x0800) fTileFunc=TileFlipSH_noop;
\r
670 else fTileFunc=TileNormSH_noop;
\r
672 if(code&0x0800) fTileFunc=TileFlip;
\r
673 else fTileFunc=TileNorm;
\r
676 for (; width; width--,sx+=8,tile+=delta)
\r
678 if(sx<=0) continue;
\r
679 if(sx>=328) break; // Offscreen
\r
681 tile&=0x7fff; // Clip tile address
\r
682 fTileFunc(sx,tile,pal);
\r
687 static void DrawSpriteInterlace(unsigned int *sprite)
\r
689 int width=0,height=0;
\r
692 int tile=0,delta=0;
\r
695 // parse the sprite data
\r
698 sy=(sy&0x3ff)-0x100; // Y
\r
699 width=(height>>2)&3; height&=3;
\r
700 width++; height++; // Width and height in tiles
\r
702 row=(Scanline<<1)-sy; // Row of the sprite we are on
\r
705 sx=((code>>16)&0x1ff)-0x78; // X
\r
707 if (code&0x1000) row^=(16<<height)-1; // Flip Y
\r
709 tile=code&0x3ff; // Tile number
\r
710 tile+=row>>4; // Tile number increases going down
\r
711 delta=height; // Delta to increase tile by going right
\r
712 if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
\r
714 tile<<=5; tile+=(row&15)<<1; // Tile address
\r
716 delta<<=5; // Delta of address
\r
717 pal=((code>>9)&0x30); // Get palette pointer
\r
719 for (; width; width--,sx+=8,tile+=delta)
\r
721 if(sx<=0) continue;
\r
722 if(sx>=328) break; // Offscreen
\r
724 tile&=0x7fff; // Clip tile address
\r
725 if (code&0x0800) TileFlip(sx,tile,pal);
\r
726 else TileNorm(sx,tile,pal);
\r
731 static void DrawAllSpritesInterlace(int *hcache, int maxwidth, int pri, int sh)
\r
733 struct PicoVideo *pvid=&Pico.video;
\r
734 int i,u,table,link=0,sline=Scanline<<1;
\r
735 unsigned int *sprites[80]; // Sprite index
\r
737 table=pvid->reg[5]&0x7f;
\r
738 if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode
\r
739 table<<=8; // Get sprite table address/2
\r
741 for (i=u=0; u < 80 && i < 21; u++)
\r
743 unsigned int *sprite;
\r
744 int code, sx, sy, height;
\r
746 sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
\r
751 if(((sx>>15)&1) != pri) goto nextsprite; // wrong priority sprite
\r
753 // check if it is on this line
\r
754 sy = (code&0x3ff)-0x100;
\r
755 height = (((code>>24)&3)+1)<<4;
\r
756 if(sline < sy || sline >= sy+height) goto nextsprite; // no
\r
758 // check if sprite is not hidden offscreen
\r
759 sx = (sx>>16)&0x1ff;
\r
760 sx -= 0x78; // Get X coordinate + 8
\r
761 if(sx <= -8*3 || sx >= maxwidth) goto nextsprite;
\r
763 // sprite is good, save it's pointer
\r
764 sprites[i++]=sprite;
\r
767 // Find next sprite
\r
768 link=(code>>16)&0x7f;
\r
769 if(!link) break; // End of sprites
\r
772 // Go through sprites backwards:
\r
773 for (i-- ;i>=0; i--)
\r
774 DrawSpriteInterlace(sprites[i]);
\r
778 #ifndef _ASM_DRAW_C
\r
779 static void DrawSpritesFromCache(int *hc, int maxwidth, int prio, int sh)
\r
781 int code, tile, sx, delta, width;
\r
783 int (*fTileFunc)(int sx,int addr,int pal);
\r
785 // prio[31]:tile[30:17]:flipx[16]:sx[15:6]:pal[5:4]:delta_width[3:0]
\r
787 while ((code=*hc++))
\r
791 width=delta>>2; delta&=3;
\r
792 width++; delta++; // Width and height in tiles
\r
793 if (code&0x10000) delta=-delta; // Flip X
\r
795 tile=((unsigned int)code>>17)<<1; // also has prio
\r
796 sx=(code<<16)>>22; // sx can be negative (start offscreen), so sign extend
\r
798 if (sh && pal == 0x30)
\r
800 if (code & 0x80000000) // hi priority
\r
802 if(code&0x10000) fTileFunc=TileFlipSH;
\r
803 else fTileFunc=TileNormSH;
\r
805 if(code&0x10000) fTileFunc=TileFlipSH_onlyop_lp;
\r
806 else fTileFunc=TileNormSH_onlyop_lp;
\r
809 if(code&0x10000) fTileFunc=TileFlip;
\r
810 else fTileFunc=TileNorm;
\r
813 for (; width; width--,sx+=8,tile+=delta)
\r
815 if(sx<=0) continue;
\r
816 if(sx>=328) break; // Offscreen
\r
818 tile&=0x7fff; // Clip tile address
\r
819 fTileFunc(sx,tile,pal);
\r
825 static void DrawSpritesFromCacheAS(int *hc, int maxwidth, int prio, int sh)
\r
827 int code, tile, sx, delta, width;
\r
828 int pal, *hce, *hco;
\r
829 int (*fTileFunc)(int sx,int addr,int pal);
\r
831 // prio[31]:tile[30:17]:flipx[16]:sx[15:6]:pal[5:4]:delta_width[3:0]
\r
833 /* walk the sprite cache backwards.. */
\r
834 hco = hce = HighCacheS_ptr;
\r
840 width=delta>>2; delta&=3;
\r
841 width++; delta++; // Width and height in tiles
\r
842 if (code&0x10000) delta=-delta; // Flip X
\r
844 tile=((unsigned int)code>>17)<<1;
\r
845 sx=(code<<16)>>22; // sx can be negative (start offscreen), so sign extend
\r
847 if (code & 0x80000000) // hi priority
\r
849 if (sh && pal == 0x30)
\r
851 if(code&0x10000) fTileFunc=TileFlipAS_noop;
\r
852 else fTileFunc=TileNormAS_noop;
\r
853 *(--hco) = code; /* save for later */
\r
855 if(code&0x10000) fTileFunc=TileFlipAS;
\r
856 else fTileFunc=TileNormAS;
\r
859 if(code&0x10000) fTileFunc=TileFlipAS_onlymark;
\r
860 else fTileFunc=TileNormAS_onlymark;
\r
864 for (; width; width--,sx+=8,tile+=delta)
\r
866 if(sx<=0) continue;
\r
867 if(sx>=328) break; // Offscreen
\r
869 tile&=0x7fff; // Clip tile address
\r
870 fTileFunc(sx,tile,pal);
\r
876 /* nasty 1: remove 'sprite' flags */
\r
878 int c = 320/4, *zb = (int *)(HighCol+8);
\r
881 *zb++ &= 0x7f7f7f7f;
\r
885 /* nasty 2: loop once more and do operator colors */
\r
886 while ((code=*hco++))
\r
889 if (pal != 0x30) continue;
\r
891 width=delta>>2; delta&=3;
\r
893 if (code&0x10000) delta=-delta; // Flip X
\r
895 tile=((unsigned int)code>>17)<<1;
\r
898 if (code & 0x80000000)
\r
900 if(code&0x10000) fTileFunc=TileFlipSH;
\r
901 else fTileFunc=TileNormSH;
\r
903 if(code&0x10000) fTileFunc=TileFlipSH_onlyop_lp;
\r
904 else fTileFunc=TileNormSH_onlyop_lp;
\r
908 for (; width; width--,sx+=8,tile+=delta)
\r
910 if(sx<=0) continue;
\r
911 if(sx>=328) break; // Offscreen
\r
913 tile&=0x7fff; // Clip tile address
\r
914 fTileFunc(sx,tile,pal);
\r
921 // Index + 0 : ----hhvv -lllllll -------y yyyyyyyy
\r
922 // Index + 4 : -------x xxxxxxxx pccvhnnn nnnnnnnn
\r
924 // Index + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size
\r
925 // Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
\r
927 static void PrepareSprites(int full)
\r
929 struct PicoVideo *pvid=&Pico.video;
\r
930 int u=0,link=0,sblocks=0;
\r
932 int *pd = HighPreSpr;
\r
934 table=pvid->reg[5]&0x7f;
\r
935 if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode
\r
936 table<<=8; // Get sprite table address/2
\r
941 // updates: tilecode, sx
\r
942 for (u=0; u < 80 && (pack = *pd); u++, pd+=2)
\r
944 unsigned int *sprite;
\r
945 int code, code2, sx, sy, skip=0;
\r
947 sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
\r
949 // parse sprite info
\r
952 code2 &= ~0xfe000000;
\r
953 code2 -= 0x00780000; // Get X coordinate + 8 in upper 16 bits
\r
956 if((sx <= 8-((pack>>28)<<3) && sx >= -0x76) || sx >= 328) skip=1<<23;
\r
957 else if ((sy = (pack<<16)>>16) < 240 && sy > -32) {
\r
958 int sbl = (2<<(pack>>28))-1;
\r
959 sblocks |= sbl<<(sy>>3);
\r
962 *pd = (pack&~(1<<23))|skip;
\r
965 // Find next sprite
\r
966 link=(code>>16)&0x7f;
\r
967 if(!link) break; // End of sprites
\r
969 SpriteBlocks |= sblocks;
\r
973 for (; u < 80; u++)
\r
975 unsigned int *sprite;
\r
976 int code, code2, sx, sy, hv, height, width, skip=0, sx_min;
\r
978 sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
\r
980 // parse sprite info
\r
982 sy = (code&0x1ff)-0x80;
\r
983 hv = (code>>24)&0xf;
\r
986 if (sy > 240 || sy + (height<<3) <= 0) skip|=1<<22; // sprite offscreen (completely, y)
\r
990 sx = (code2>>16)&0x1ff;
\r
991 sx -= 0x78; // Get X coordinate + 8
\r
992 sx_min = 8-(width<<3);
\r
994 if ((sx <= sx_min && sx >= -0x76) || sx >= 328) skip|=1<<23; // offscreen x
\r
995 else if (sx > sx_min && !skip) {
\r
996 int sbl = (2<<height)-1;
\r
998 if(shi < 0) shi=0; // negative sy
\r
999 sblocks |= sbl<<shi;
\r
1002 *pd++ = (width<<28)|(height<<24)|skip|(hv<<16)|((unsigned short)sy);
\r
1003 *pd++ = (sx<<16)|((unsigned short)code2);
\r
1005 // Find next sprite
\r
1006 link=(code>>16)&0x7f;
\r
1007 if(!link) break; // End of sprites
\r
1009 SpriteBlocks = sblocks;
\r
1010 *pd = 0; // terminate
\r
1014 static void DrawAllSprites(int *hcache, int maxwidth, int prio, int sh)
\r
1017 int sx1seen = 0; // sprite with x coord 1 or 0 seen
\r
1018 int ntiles = 0; // tile counter for sprite limit emulation
\r
1019 int *sprites[40]; // Sprites to draw in fast mode
\r
1020 int max_line_sprites = 20; // 20 sprites, 40 tiles
\r
1021 int *ps, pack, rs = rendstatus, scan = Scanline;
\r
1023 if (rs & (PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES)) {
\r
1024 //dprintf("PrepareSprites(%i) [%i]", (rs>>4)&1, scan);
\r
1025 PrepareSprites(rs & PDRAW_DIRTY_SPRITES);
\r
1026 rendstatus = rs & ~(PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES);
\r
1028 if (!(SpriteBlocks & (1<<(scan>>3)))) { *hcache = 0; return; }
\r
1030 if (PicoOpt & POPT_DIS_SPRITE_LIM)
\r
1031 max_line_sprites = 80;
\r
1033 HighCacheS_ptr = hcache;
\r
1036 // Index + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size
\r
1037 // Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
\r
1039 for (i=u=n=0; (pack = *ps) && n < max_line_sprites; ps+=2, u++)
\r
1041 int sx, sy, row, pack2;
\r
1043 if (pack & 0x00400000) continue;
\r
1045 // get sprite info
\r
1048 sy = (pack <<16)>>16;
\r
1051 // elprintf(EL_ANOMALY, "x: %4i y: %4i p %i %ix%i", sx, sy, (pack2>>15)&1, (pack>>28)<<3, (pack>>21)&0x38);
\r
1053 if (sx == -0x77) sx1seen|=1; // for masking mode 2
\r
1055 // check if it is on this line
\r
1056 if (row < 0 || row >= ((pack>>21)&0x38)) continue; // no
\r
1058 // masking sprite?
\r
1059 if (sx == -0x78) {
\r
1060 if (n > 0) break; // masked
\r
1064 n++; // number of sprites on this line (both visible and hidden, except of x=0)
\r
1067 ntiles += pack>>28;
\r
1068 if (ntiles > max_line_sprites*2) break;
\r
1070 if (pack & 0x00800000) continue;
\r
1072 // sprite is good, save it's pointer
\r
1076 n = (rs & PDRAW_ACC_SPRITES) ? 1 : 0;
\r
1078 // Go through sprites backwards:
\r
1079 for (i--; i>=0; i--)
\r
1080 DrawSprite(sprites[i],sh,n);
\r
1082 // terminate cache list
\r
1083 *HighCacheS_ptr = 0;
\r
1087 // --------------------------------------------
\r
1089 #ifndef _ASM_DRAW_C
\r
1090 static void BackFill(int reg7, int sh)
\r
1092 unsigned int back;
\r
1094 // Start with a blank scanline (background colour):
\r
1100 memset32((int *)(HighCol+8), back, 320/4);
\r
1104 // --------------------------------------------
\r
1106 unsigned short HighPal[0x100];
\r
1108 #ifndef _ASM_DRAW_C
\r
1109 static void FinalizeLineBGR444(int sh)
\r
1111 unsigned short *pd=DrawLineDest;
\r
1112 unsigned char *ps=HighCol+8;
\r
1113 unsigned short *pal=Pico.cram;
\r
1114 int len, i, t, mask=0xff;
\r
1116 if (Pico.video.reg[12]&1) {
\r
1119 if(!(PicoOpt&POPT_DIS_32C_BORDER)) pd+=32;
\r
1125 if(Pico.m.dirtyPal) {
\r
1126 blockcpy(pal, Pico.cram, 0x40*2);
\r
1127 // shadowed pixels
\r
1128 for(i = 0x3f; i >= 0; i--)
\r
1129 pal[0x40|i] = pal[0xc0|i] = (unsigned short)((pal[i]>>1)&0x0777);
\r
1130 // hilighted pixels
\r
1131 for(i = 0x3f; i >= 0; i--) {
\r
1132 t=pal[i]&0xeee;t+=0x444;if(t&0x10)t|=0xe;if(t&0x100)t|=0xe0;if(t&0x1000)t|=0xe00;t&=0xeee;
\r
1133 pal[0x80|i]=(unsigned short)t;
\r
1135 Pico.m.dirtyPal = 0;
\r
1139 if (!sh && (rendstatus & PDRAW_ACC_SPRITES))
\r
1140 mask=0x3f; // accurate sprites
\r
1142 for(i = 0; i < len; i++)
\r
1143 pd[i] = pal[ps[i] & mask];
\r
1147 static void FinalizeLineRGB555(int sh)
\r
1149 unsigned short *pd=DrawLineDest;
\r
1150 unsigned char *ps=HighCol+8;
\r
1151 unsigned short *pal=HighPal;
\r
1152 int len, i, t, dirtyPal = Pico.m.dirtyPal;
\r
1156 unsigned int *spal=(void *)Pico.cram;
\r
1157 unsigned int *dpal=(void *)HighPal;
\r
1158 for (i = 0x3f/2; i >= 0; i--)
\r
1160 dpal[i] = ((spal[i]&0x000f000f)<< 1)|((spal[i]&0x00f000f0)<<3)|((spal[i]&0x0f000f00)<<4);
\r
1162 dpal[i] = ((spal[i]&0x000f000f)<<12)|((spal[i]&0x00f000f0)<<3)|((spal[i]&0x0f000f00)>>7);
\r
1164 Pico.m.dirtyPal = 0;
\r
1170 // shadowed pixels
\r
1171 for (i = 0x3f; i >= 0; i--)
\r
1172 pal[0x40|i] = pal[0xc0|i] = (unsigned short)((pal[i]>>1)&0x738e);
\r
1173 // hilighted pixels
\r
1174 for (i = 0x3f; i >= 0; i--) {
\r
1175 t=pal[i]&0xe71c;t+=0x4208;if(t&0x20)t|=0x1c;if(t&0x800)t|=0x700;if(t&0x10000)t|=0xe000;t&=0xe71c;
\r
1176 pal[0x80|i]=(unsigned short)t;
\r
1181 if (Pico.video.reg[12]&1) {
\r
1184 if (!(PicoOpt&POPT_DIS_32C_BORDER)) pd+=32;
\r
1191 if (!sh && (rendstatus & PDRAW_ACC_SPRITES))
\r
1192 mask=0x3f; // accurate sprites, upper bits are priority stuff
\r
1194 for (i = 0; i < len; i++)
\r
1195 pd[i] = pal[ps[i] & mask];
\r
1197 extern void amips_clut(unsigned short *dst, unsigned char *src, unsigned short *pal, int count);
\r
1198 extern void amips_clut_6bit(unsigned short *dst, unsigned char *src, unsigned short *pal, int count);
\r
1199 if (!sh && (rendstatus & PDRAW_ACC_SPRITES))
\r
1200 amips_clut_6bit(pd, ps, pal, len);
\r
1201 else amips_clut(pd, ps, pal, len);
\r
1207 static void FinalizeLine8bit(int sh)
\r
1209 unsigned char *pd=DrawLineDest;
\r
1210 int len, rs = rendstatus;
\r
1211 static int dirty_count;
\r
1213 if (!sh && !(rs & PDRAW_ACC_SPRITES) && Pico.m.dirtyPal == 1 && Scanline < 222)
\r
1215 // a hack for mid-frame palette changes
\r
1216 if (!(rs & PDRAW_SONIC_MODE))
\r
1218 else dirty_count++;
\r
1219 rs |= PDRAW_SONIC_MODE;
\r
1221 if (dirty_count == 3) {
\r
1222 blockcpy(HighPal, Pico.cram, 0x40*2);
\r
1223 } else if (dirty_count == 11) {
\r
1224 blockcpy(HighPal+0x40, Pico.cram, 0x40*2);
\r
1228 if (Pico.video.reg[12]&1) {
\r
1231 if (!(PicoOpt&POPT_DIS_32C_BORDER)) pd+=32;
\r
1235 if (!sh && (rs & PDRAW_SONIC_MODE)) {
\r
1236 if (dirty_count >= 11) {
\r
1237 blockcpy_or(pd, HighCol+8, len, 0x80);
\r
1239 blockcpy_or(pd, HighCol+8, len, 0x40);
\r
1242 blockcpy(pd, HighCol+8, len);
\r
1246 static void (*FinalizeLine)(int sh) = FinalizeLineBGR444;
\r
1248 // hblank was enabled early during prev line processng -
\r
1249 // it should have been blanked
\r
1250 static void handle_early_blank(int scanline, int sh)
\r
1254 if (PicoScanBegin != NULL)
\r
1255 PicoScanBegin(scanline);
\r
1257 BackFill(Pico.video.reg[7], sh);
\r
1259 if (FinalizeLine != NULL)
\r
1262 if (PicoScanEnd != NULL)
\r
1263 PicoScanEnd(scanline);
\r
1266 // --------------------------------------------
\r
1268 static int DrawDisplay(int sh, int as)
\r
1270 struct PicoVideo *pvid=&Pico.video;
\r
1271 int win=0,edge=0,hvwind=0;
\r
1272 int maxw, maxcells;
\r
1274 rendstatus &= ~(PDRAW_SHHI_DONE|PDRAW_PLANE_HI_PRIO);
\r
1276 if(pvid->reg[12]&1) {
\r
1277 maxw = 328; maxcells = 40;
\r
1279 maxw = 264; maxcells = 32;
\r
1282 // Find out if the window is on this line:
\r
1283 win=pvid->reg[0x12];
\r
1284 edge=(win&0x1f)<<3;
\r
1286 if (win&0x80) { if (Scanline>=edge) hvwind=1; }
\r
1287 else { if (Scanline< edge) hvwind=1; }
\r
1289 if (!hvwind) { // we might have a vertical window here
\r
1290 win=pvid->reg[0x11];
\r
1293 if (!edge) hvwind=1;
\r
1294 else if(edge < (maxcells>>1)) hvwind=2;
\r
1297 else if(edge < (maxcells>>1)) hvwind=2;
\r
1302 DrawLayer(1|((sh|as)<<1), HighCacheB, 0, maxcells);
\r
1304 DrawWindow(0, maxcells>>1, 0, sh|as);
\r
1305 else if (hvwind == 2) {
\r
1306 // ahh, we have vertical window
\r
1307 DrawLayer(0|((sh|as)<<1), HighCacheA, (win&0x80) ? 0 : edge<<1, (win&0x80) ? edge<<1 : maxcells);
\r
1308 DrawWindow( (win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 0, sh|as);
\r
1310 DrawLayer(0|((sh|as)<<1), HighCacheA, 0, maxcells);
\r
1311 DrawAllSpritesLoPri(HighCacheS, maxw, 0, sh);
\r
1313 if (HighCacheB[0]) DrawTilesFromCache(HighCacheB, sh, 328);
\r
1315 DrawWindow(0, maxcells>>1, 1, sh);
\r
1316 else if (hvwind == 2) {
\r
1317 if(HighCacheA[0]) DrawTilesFromCache(HighCacheA, sh, (win&0x80) ? edge<<4 : 328);
\r
1318 DrawWindow((win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 1, sh);
\r
1320 if (HighCacheA[0]) DrawTilesFromCache(HighCacheA, sh, 328);
\r
1321 if (HighCacheS[0]) DrawAllSpritesHiPri(HighCacheS, maxw, 1, sh);
\r
1326 for (a = 0, c = HighCacheA; *c; c++, a++);
\r
1327 for (b = 0, c = HighCacheB; *c; c++, b++);
\r
1328 printf("%i:%03i: a=%i, b=%i\n", Pico.m.frame_count, Scanline, a, b);
\r
1336 PICO_INTERNAL void PicoFrameStart(void)
\r
1338 // prepare to do this frame
\r
1339 rendstatus = (PicoOpt&0x80)>>5; // accurate sprites, clear everything else
\r
1340 if ((Pico.video.reg[12]&6) == 6) {
\r
1341 rendstatus |= PDRAW_INTERLACE; // interlace mode
\r
1342 DrawAllSpritesLoPri = DrawAllSpritesInterlace;
\r
1343 DrawAllSpritesHiPri = DrawAllSpritesInterlace;
\r
1347 DrawAllSpritesLoPri = DrawAllSprites;
\r
1348 DrawAllSpritesHiPri = rendstatus ? DrawSpritesFromCacheAS : DrawSpritesFromCache;
\r
1351 if (Pico.m.dirtyPal) Pico.m.dirtyPal = 2; // reset dirty if needed
\r
1353 PrepareSprites(1);
\r
1357 PICO_INTERNAL int PicoLine(int scan)
\r
1360 if (skip_next_line>0) { skip_next_line--; return 0; } // skip_next_line rendering lines
\r
1363 sh=(Pico.video.reg[0xC]&8)>>3; // shadow/hilight?
\r
1364 if (rendstatus & PDRAW_ACC_SPRITES) as|=1; // accurate sprites
\r
1366 if (rendstatus & PDRAW_EARLY_BLANK) {
\r
1367 if (scan > 0) handle_early_blank(scan, sh);
\r
1368 rendstatus &= ~PDRAW_EARLY_BLANK;
\r
1371 if (PicoScanBegin != NULL)
\r
1372 skip_next_line = PicoScanBegin(scan);
\r
1375 BackFill(Pico.video.reg[7], sh|as);
\r
1376 if (Pico.video.reg[1]&0x40)
\r
1377 DrawDisplay(sh, as);
\r
1379 if (FinalizeLine != NULL)
\r
1382 if (PicoScanEnd != NULL)
\r
1383 PicoScanEnd(scan);
\r
1389 void PicoDrawSetColorFormat(int which)
\r
1393 case 2: FinalizeLine = FinalizeLine8bit; break;
\r
1394 case 1: FinalizeLine = FinalizeLineRGB555; break;
\r
1395 case 0: FinalizeLine = FinalizeLineBGR444; break;
\r
1396 default:FinalizeLine = NULL; break;
\r
1398 #if OVERRIDE_HIGHCOL
\r
1399 if (which) HighCol=DefHighCol;
\r