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 (8bit mode only)
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14 * - accurate sprites (AS) [+ s/h]
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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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20 * since renderer always draws line in 8bit mode, there are 2 spare bits:
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21 * b \ mode: s/h as sonic
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23 * 01 shadow - pal index
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24 * 10 hilight+op spr spr pal index
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25 * 11 shadow +op spr - pal index
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27 * not handled properly:
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28 * - hilight op on shadow tile
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29 * - AS + s/h (s/h sprite flag interferes with and cleared by AS code)
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32 #include "pico_int.h"
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34 int (*PicoScanBegin)(unsigned int num) = NULL;
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35 int (*PicoScanEnd) (unsigned int num) = NULL;
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37 #if OVERRIDE_HIGHCOL
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38 static unsigned char DefHighCol[8+320+8];
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39 unsigned char *HighCol=DefHighCol;
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41 unsigned char HighCol[8+320+8];
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43 static unsigned int DefOutBuff[320*2/2];
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44 void *DrawLineDest=DefOutBuff; // pointer to dest buffer where to draw this line to
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46 static int HighCacheA[41+1]; // caches for high layers
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47 static int HighCacheB[41+1];
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48 int HighPreSpr[80*2+1]; // slightly preprocessed sprites
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50 #define SPRL_HAVE_HI 0x80 // have hi priority sprites
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51 #define SPRL_HAVE_LO 0x40 // *lo*
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52 #define SPRL_MAY_HAVE_OP 0x20 // may have operator sprites on the line
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53 #define SPRL_LO_ABOVE_HI 0x10 // low priority sprites may be on top of hi
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54 unsigned char HighLnSpr[240][3 + MAX_LINE_SPRITES]; // sprite_count, ^flags, tile_count, [spritep]...
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56 int rendstatus, rendstatus_old;
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58 int PicoDrawMask = -1;
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60 static int skip_next_line=0;
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62 //unsigned short ppt[] = { 0x0f11, 0x0ff1, 0x01f1, 0x011f, 0x01ff, 0x0f1f, 0x0f0e, 0x0e7c };
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66 int nametab; // Position in VRAM of name table (for this tile line)
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67 int line; // Line number in pixels 0x000-0x3ff within the virtual tilemap
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68 int hscroll; // Horizontal scroll value in pixels for the line
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69 int xmask; // X-Mask (0x1f - 0x7f) for horizontal wraparound in the tilemap
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70 int *hc; // cache for high tile codes and their positions
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71 int cells; // cells (tiles) to draw (32 col mode doesn't need to update whole 320)
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74 // stuff available in asm:
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76 void DrawWindow(int tstart, int tend, int prio, int sh);
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77 void DrawAllSprites(unsigned char *sprited, int prio, int sh);
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78 void DrawTilesFromCache(int *hc, int sh, int rlim);
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79 void DrawSpritesSHi(unsigned char *sprited);
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80 void DrawLayer(int plane_sh, int *hcache, int cellskip, int maxcells);
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81 void FinalizeLineBGR444(int sh);
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82 void *blockcpy(void *dst, const void *src, size_t n);
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83 void blockcpy_or(void *dst, void *src, size_t n, int pat);
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86 void blockcpy_or(void *dst, void *src, size_t n, int pat)
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88 unsigned char *pd = dst, *ps = src;
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90 *pd++ = (unsigned char) (*ps++ | pat);
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92 #define blockcpy memcpy
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96 #define TileNormMaker(funcname,pix_func) \
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97 static int funcname(int sx,int addr,int pal) \
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99 unsigned char *pd = HighCol+sx; \
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100 unsigned int pack=0; unsigned int t=0; \
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102 pack=*(unsigned int *)(Pico.vram+addr); /* Get 8 pixels */ \
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105 t=(pack&0x0000f000)>>12; pix_func(0); \
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106 t=(pack&0x00000f00)>> 8; pix_func(1); \
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107 t=(pack&0x000000f0)>> 4; pix_func(2); \
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108 t=(pack&0x0000000f) ; pix_func(3); \
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109 t=(pack&0xf0000000)>>28; pix_func(4); \
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110 t=(pack&0x0f000000)>>24; pix_func(5); \
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111 t=(pack&0x00f00000)>>20; pix_func(6); \
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112 t=(pack&0x000f0000)>>16; pix_func(7); \
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116 return 1; /* Tile blank */ \
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120 #define TileFlipMaker(funcname,pix_func) \
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121 static int funcname(int sx,int addr,int pal) \
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123 unsigned char *pd = HighCol+sx; \
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124 unsigned int pack=0; unsigned int t=0; \
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126 pack=*(unsigned int *)(Pico.vram+addr); /* Get 8 pixels */ \
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129 t=(pack&0x000f0000)>>16; pix_func(0); \
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130 t=(pack&0x00f00000)>>20; pix_func(1); \
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131 t=(pack&0x0f000000)>>24; pix_func(2); \
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132 t=(pack&0xf0000000)>>28; pix_func(3); \
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133 t=(pack&0x0000000f) ; pix_func(4); \
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134 t=(pack&0x000000f0)>> 4; pix_func(5); \
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135 t=(pack&0x00000f00)>> 8; pix_func(6); \
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136 t=(pack&0x0000f000)>>12; pix_func(7); \
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140 return 1; /* Tile blank */ \
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144 #ifdef _ASM_DRAW_C_AMIPS
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145 int TileNorm(int sx,int addr,int pal);
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146 int TileFlip(int sx,int addr,int pal);
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149 #define pix_just_write(x) \
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152 TileNormMaker(TileNorm,pix_just_write)
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153 TileFlipMaker(TileFlip,pix_just_write)
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157 #ifndef _ASM_DRAW_C
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159 // draw a sprite pixel, process operator colors
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160 #define pix_sh(x) \
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162 else if (t>=0xe) pd[x]=(pd[x]&0x3f)|(t<<6); /* c0 shadow, 80 hilight */ \
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165 TileNormMaker(TileNormSH, pix_sh)
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166 TileFlipMaker(TileFlipSH, pix_sh)
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168 // draw a sprite pixel, mark operator colors
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169 #define pix_sh_markop(x) \
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171 else if (t>=0xe) pd[x]|=0x80; \
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174 TileNormMaker(TileNormSH_markop, pix_sh_markop)
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175 TileFlipMaker(TileFlipSH_markop, pix_sh_markop)
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177 // process operator pixels only, apply only on low pri tiles and other op pixels
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178 #define pix_sh_onlyop(x) \
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179 if (t>=0xe && (pd[x]&0xc0)) \
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180 pd[x]=(pd[x]&0x3f)|(t<<6); /* c0 shadow, 80 hilight */ \
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182 TileNormMaker(TileNormSH_onlyop_lp, pix_sh_onlyop)
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183 TileFlipMaker(TileFlipSH_onlyop_lp, pix_sh_onlyop)
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187 // draw a sprite pixel (AS)
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188 #define pix_as(x) \
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189 if (t && !(pd[x]&0x80)) pd[x]=pal|t
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191 TileNormMaker(TileNormAS, pix_as)
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192 TileFlipMaker(TileFlipAS, pix_as)
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194 // draw a sprite pixel, skip operator colors (AS)
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195 #define pix_sh_as_noop(x) \
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196 if (t && t < 0xe && !(pd[x]&0x80)) pd[x]=pal|t
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198 TileNormMaker(TileNormAS_noop, pix_sh_as_noop)
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199 TileFlipMaker(TileFlipAS_noop, pix_sh_as_noop)
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201 // mark pixel as sprite pixel (AS)
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202 #define pix_sh_as_onlymark(x) \
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205 TileNormMaker(TileNormAS_onlymark, pix_sh_as_onlymark)
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206 TileFlipMaker(TileFlipAS_onlymark, pix_sh_as_onlymark)
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209 // --------------------------------------------
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211 #ifndef _ASM_DRAW_C
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212 static void DrawStrip(struct TileStrip *ts, int plane_sh, int cellskip)
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214 int tilex,dx,ty,code=0,addr=0,cells;
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215 int oldcode=-1,blank=-1; // The tile we know is blank
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218 // Draw tiles across screen:
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219 sh=(plane_sh<<5)&0x40;
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220 tilex=((-ts->hscroll)>>3)+cellskip;
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221 ty=(ts->line&7)<<1; // Y-Offset into tile
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222 dx=((ts->hscroll-1)&7)+1;
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223 cells = ts->cells - cellskip;
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224 if(dx != 8) cells++; // have hscroll, need to draw 1 cell more
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227 for (; cells > 0; dx+=8,tilex++,cells--)
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231 code=Pico.vram[ts->nametab+(tilex&ts->xmask)];
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232 if (code==blank) continue;
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233 if (code>>15) { // high priority tile
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234 int cval = code | (dx<<16) | (ty<<25);
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235 if(code&0x1000) cval^=7<<26;
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236 *ts->hc++ = cval; // cache it
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240 if (code!=oldcode) {
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242 // Get tile address/2:
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243 addr=(code&0x7ff)<<4;
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245 if (code&0x1000) addr^=0xe; // Y-flip
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247 pal=((code>>9)&0x30)|sh;
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250 if (code&0x0800) zero=TileFlip(dx,addr,pal);
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251 else zero=TileNorm(dx,addr,pal);
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253 if (zero) blank=code; // We know this tile is blank now
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256 // terminate the cache list
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258 // if oldcode wasn't changed, it means all layer is hi priority
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259 if (oldcode == -1) rendstatus |= PDRAW_PLANE_HI_PRIO;
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263 void DrawStripVSRam(struct TileStrip *ts, int plane_sh, int cellskip)
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265 int tilex,dx,code=0,addr=0,cell=0;
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266 int oldcode=-1,blank=-1; // The tile we know is blank
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267 int pal=0,scan=DrawScanline;
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269 // Draw tiles across screen:
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270 tilex=(-ts->hscroll)>>3;
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271 dx=((ts->hscroll-1)&7)+1;
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272 if(dx != 8) cell--; // have hscroll, start with negative cell
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277 for (; cell < ts->cells; dx+=8,tilex++,cell++)
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279 int zero=0,nametabadd,ty;
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284 vscroll=Pico.vsram[(plane_sh&1)+(cell&~1)];
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286 // Find the line in the name table
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287 line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..
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288 nametabadd=(line>>3)<<(ts->line>>24); // .. and shift[width]
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289 ty=(line&7)<<1; // Y-Offset into tile
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292 code=Pico.vram[ts->nametab+nametabadd+(tilex&ts->xmask)];
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293 if (code==blank) continue;
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294 if (code>>15) { // high priority tile
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295 int cval = code | (dx<<16) | (ty<<25);
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296 if(code&0x1000) cval^=7<<26;
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297 *ts->hc++ = cval; // cache it
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301 if (code!=oldcode) {
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303 // Get tile address/2:
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304 addr=(code&0x7ff)<<4;
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305 if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
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307 pal=((code>>9)&0x30)|((plane_sh<<5)&0x40);
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310 if (code&0x0800) zero=TileFlip(dx,addr,pal);
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311 else zero=TileNorm(dx,addr,pal);
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313 if (zero) blank=code; // We know this tile is blank now
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316 // terminate the cache list
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318 if (oldcode == -1) rendstatus |= PDRAW_PLANE_HI_PRIO;
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322 #ifndef _ASM_DRAW_C
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325 void DrawStripInterlace(struct TileStrip *ts)
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327 int tilex=0,dx=0,ty=0,code=0,addr=0,cells;
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328 int oldcode=-1,blank=-1; // The tile we know is blank
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331 // Draw tiles across screen:
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332 tilex=(-ts->hscroll)>>3;
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333 ty=(ts->line&15)<<1; // Y-Offset into tile
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334 dx=((ts->hscroll-1)&7)+1;
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336 if(dx != 8) cells++; // have hscroll, need to draw 1 cell more
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338 for (; cells; dx+=8,tilex++,cells--)
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342 code=Pico.vram[ts->nametab+(tilex&ts->xmask)];
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343 if (code==blank) continue;
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344 if (code>>15) { // high priority tile
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345 int cval = (code&0xfc00) | (dx<<16) | (ty<<25);
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346 cval|=(code&0x3ff)<<1;
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347 if(code&0x1000) cval^=0xf<<26;
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348 *ts->hc++ = cval; // cache it
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352 if (code!=oldcode) {
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354 // Get tile address/2:
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355 addr=(code&0x7ff)<<5;
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356 if (code&0x1000) addr+=30-ty; else addr+=ty; // Y-flip
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358 // pal=Pico.cram+((code>>9)&0x30);
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359 pal=((code>>9)&0x30);
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362 if (code&0x0800) zero=TileFlip(dx,addr,pal);
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363 else zero=TileNorm(dx,addr,pal);
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365 if (zero) blank=code; // We know this tile is blank now
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368 // terminate the cache list
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372 // --------------------------------------------
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374 #ifndef _ASM_DRAW_C
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375 static void DrawLayer(int plane_sh, int *hcache, int cellskip, int maxcells)
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377 struct PicoVideo *pvid=&Pico.video;
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378 const char shift[4]={5,6,5,7}; // 32,64 or 128 sized tilemaps (2 is invalid)
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379 struct TileStrip ts;
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380 int width, height, ymask;
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386 // Work out the TileStrip to draw
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388 // Work out the name table size: 32 64 or 128 tiles (0-3)
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389 width=pvid->reg[16];
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390 height=(width>>4)&3; width&=3;
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392 ts.xmask=(1<<shift[width])-1; // X Mask in tiles (0x1f-0x7f)
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393 ymask=(height<<8)|0xff; // Y Mask in pixels
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394 if(width == 1) ymask&=0x1ff;
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395 else if(width>1) ymask =0x0ff;
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397 // Find name table:
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398 if (plane_sh&1) ts.nametab=(pvid->reg[4]&0x07)<<12; // B
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399 else ts.nametab=(pvid->reg[2]&0x38)<< 9; // A
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401 htab=pvid->reg[13]<<9; // Horizontal scroll table address
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402 if ( pvid->reg[11]&2) htab+=DrawScanline<<1; // Offset by line
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403 if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile
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404 htab+=plane_sh&1; // A or B
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406 // Get horizontal scroll value, will be masked later
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407 ts.hscroll=Pico.vram[htab&0x7fff];
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409 if((pvid->reg[12]&6) == 6) {
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410 // interlace mode 2
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411 vscroll=Pico.vsram[plane_sh&1]; // Get vertical scroll value
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413 // Find the line in the name table
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414 ts.line=(vscroll+(DrawScanline<<1))&((ymask<<1)|1);
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415 ts.nametab+=(ts.line>>4)<<shift[width];
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417 DrawStripInterlace(&ts);
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418 } else if( pvid->reg[11]&4) {
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419 // shit, we have 2-cell column based vscroll
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420 // luckily this doesn't happen too often
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421 ts.line=ymask|(shift[width]<<24); // save some stuff instead of line
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422 DrawStripVSRam(&ts, plane_sh, cellskip);
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424 vscroll=Pico.vsram[plane_sh&1]; // Get vertical scroll value
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426 // Find the line in the name table
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427 ts.line=(vscroll+DrawScanline)&ymask;
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428 ts.nametab+=(ts.line>>3)<<shift[width];
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430 DrawStrip(&ts, plane_sh, cellskip);
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435 // --------------------------------------------
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437 // tstart & tend are tile pair numbers
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438 static void DrawWindow(int tstart, int tend, int prio, int sh) // int *hcache
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440 struct PicoVideo *pvid=&Pico.video;
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441 int tilex,ty,nametab,code=0;
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442 int blank=-1; // The tile we know is blank
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444 // Find name table line:
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445 if (pvid->reg[12]&1)
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447 nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode
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448 nametab+=(DrawScanline>>3)<<6;
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452 nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode
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453 nametab+=(DrawScanline>>3)<<5;
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458 if (!(rendstatus & PDRAW_WND_DIFF_PRIO)) {
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459 // check the first tile code
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460 code=Pico.vram[nametab+tilex];
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461 // if the whole window uses same priority (what is often the case), we may be able to skip this field
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462 if ((code>>15) != prio) return;
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466 ty=(DrawScanline&7)<<1; // Y-Offset into tile
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468 // Draw tiles across screen:
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471 for (; tilex < tend; tilex++)
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476 code=Pico.vram[nametab+tilex];
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477 if (code==blank) continue;
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478 if ((code>>15) != prio) {
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479 rendstatus |= PDRAW_WND_DIFF_PRIO;
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483 pal=((code>>9)&0x30);
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485 // Get tile address/2:
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486 addr=(code&0x7ff)<<4;
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487 if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
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489 if (code&0x0800) zero=TileFlip(8+(tilex<<3),addr,pal);
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490 else zero=TileNorm(8+(tilex<<3),addr,pal);
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492 if (zero) blank=code; // We know this tile is blank now
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497 for (; tilex < tend; tilex++)
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502 code=Pico.vram[nametab+tilex];
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503 if(code==blank) continue;
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504 if((code>>15) != prio) {
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505 rendstatus |= PDRAW_WND_DIFF_PRIO;
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509 pal=((code>>9)&0x30);
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512 int *zb = (int *)(HighCol+8+(tilex<<3));
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513 *zb++ &= 0xbfbfbfbf;
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519 // Get tile address/2:
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520 addr=(code&0x7ff)<<4;
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521 if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
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523 if (code&0x0800) zero=TileFlip(8+(tilex<<3),addr,pal);
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524 else zero=TileNorm(8+(tilex<<3),addr,pal);
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526 if (zero) blank=code; // We know this tile is blank now
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531 // --------------------------------------------
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533 static void DrawTilesFromCacheShPrep(void)
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535 // as some layer has covered whole line with hi priority tiles,
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536 // we can process whole line and then act as if sh/hi mode was off,
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537 // but leave lo pri op sprite markers alone
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538 int c = 320/4, *zb = (int *)(HighCol+8);
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539 rendstatus |= PDRAW_SHHI_DONE;
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542 *zb++ &= 0xbfbfbfbf;
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546 static void DrawTilesFromCache(int *hc, int sh, int rlim)
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548 int code, addr, dx;
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551 // *ts->hc++ = code | (dx<<16) | (ty<<25); // cache it
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553 if (sh && (rendstatus & (PDRAW_SHHI_DONE|PDRAW_PLANE_HI_PRIO)))
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555 if (!(rendstatus & PDRAW_SHHI_DONE))
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556 DrawTilesFromCacheShPrep();
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562 short blank=-1; // The tile we know is blank
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563 while ((code=*hc++)) {
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565 if((short)code == blank) continue;
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566 // Get tile address/2:
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567 addr=(code&0x7ff)<<4;
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568 addr+=(unsigned int)code>>25; // y offset into tile
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569 dx=(code>>16)&0x1ff;
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571 pal=((code>>9)&0x30);
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572 if (rlim-dx < 0) goto last_cut_tile;
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574 if (code&0x0800) zero=TileFlip(dx,addr,pal);
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575 else zero=TileNorm(dx,addr,pal);
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577 if (zero) blank=(short)code;
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582 while ((code=*hc++)) {
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584 // Get tile address/2:
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585 addr=(code&0x7ff)<<4;
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586 addr+=(unsigned int)code>>25; // y offset into tile
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587 dx=(code>>16)&0x1ff;
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589 *zb++ &= 0xbf; *zb++ &= 0xbf; *zb++ &= 0xbf; *zb++ &= 0xbf;
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590 *zb++ &= 0xbf; *zb++ &= 0xbf; *zb++ &= 0xbf; *zb++ &= 0xbf;
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592 pal=((code>>9)&0x30);
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593 if (rlim-dx < 0) goto last_cut_tile;
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595 if (code&0x0800) TileFlip(dx,addr,pal);
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596 else TileNorm(dx,addr,pal);
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603 unsigned int t, pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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604 unsigned char *pd = HighCol+dx;
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610 case 7: t=pack&0x00000f00; if (t) pd[6]=(unsigned char)(pal|(t>> 8)); // "break" is left out intentionally
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611 case 6: t=pack&0x000000f0; if (t) pd[5]=(unsigned char)(pal|(t>> 4));
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612 case 5: t=pack&0x0000000f; if (t) pd[4]=(unsigned char)(pal|(t ));
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613 case 4: t=pack&0xf0000000; if (t) pd[3]=(unsigned char)(pal|(t>>28));
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614 case 3: t=pack&0x0f000000; if (t) pd[2]=(unsigned char)(pal|(t>>24));
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615 case 2: t=pack&0x00f00000; if (t) pd[1]=(unsigned char)(pal|(t>>20));
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616 case 1: t=pack&0x000f0000; if (t) pd[0]=(unsigned char)(pal|(t>>16));
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624 case 7: t=pack&0x00f00000; if (t) pd[6]=(unsigned char)(pal|(t>>20));
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625 case 6: t=pack&0x0f000000; if (t) pd[5]=(unsigned char)(pal|(t>>24));
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626 case 5: t=pack&0xf0000000; if (t) pd[4]=(unsigned char)(pal|(t>>28));
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627 case 4: t=pack&0x0000000f; if (t) pd[3]=(unsigned char)(pal|(t ));
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628 case 3: t=pack&0x000000f0; if (t) pd[2]=(unsigned char)(pal|(t>> 4));
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629 case 2: t=pack&0x00000f00; if (t) pd[1]=(unsigned char)(pal|(t>> 8));
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630 case 1: t=pack&0x0000f000; if (t) pd[0]=(unsigned char)(pal|(t>>12));
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637 // --------------------------------------------
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639 // Index + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size
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640 // Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
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642 static void DrawSprite(int *sprite, int sh)
\r
644 int width=0,height=0;
\r
647 int tile=0,delta=0;
\r
649 int (*fTileFunc)(int sx,int addr,int pal);
\r
651 // parse the sprite data
\r
656 height=(sy>>24)&7; // Width and height in tiles
\r
657 sy=(sy<<16)>>16; // Y
\r
659 row=DrawScanline-sy; // Row of the sprite we are on
\r
661 if (code&0x1000) row=(height<<3)-1-row; // Flip Y
\r
663 tile=code + (row>>3); // Tile number increases going down
\r
664 delta=height; // Delta to increase tile by going right
\r
665 if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
\r
667 tile &= 0x7ff; tile<<=4; tile+=(row&7)<<1; // Tile address
\r
668 delta<<=4; // Delta of address
\r
670 pal=(code>>9)&0x30;
\r
673 if (sh && (code&0x6000) == 0x6000) {
\r
674 if(code&0x0800) fTileFunc=TileFlipSH_markop;
\r
675 else fTileFunc=TileNormSH_markop;
\r
677 if(code&0x0800) fTileFunc=TileFlip;
\r
678 else fTileFunc=TileNorm;
\r
681 for (; width; width--,sx+=8,tile+=delta)
\r
683 if(sx<=0) continue;
\r
684 if(sx>=328) break; // Offscreen
\r
686 tile&=0x7fff; // Clip tile address
\r
687 fTileFunc(sx,tile,pal);
\r
692 static void DrawSpriteInterlace(unsigned int *sprite)
\r
694 int width=0,height=0;
\r
697 int tile=0,delta=0;
\r
700 // parse the sprite data
\r
703 sy=(sy&0x3ff)-0x100; // Y
\r
704 width=(height>>2)&3; height&=3;
\r
705 width++; height++; // Width and height in tiles
\r
707 row=(DrawScanline<<1)-sy; // Row of the sprite we are on
\r
710 sx=((code>>16)&0x1ff)-0x78; // X
\r
712 if (code&0x1000) row^=(16<<height)-1; // Flip Y
\r
714 tile=code&0x3ff; // Tile number
\r
715 tile+=row>>4; // Tile number increases going down
\r
716 delta=height; // Delta to increase tile by going right
\r
717 if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
\r
719 tile<<=5; tile+=(row&15)<<1; // Tile address
\r
721 delta<<=5; // Delta of address
\r
722 pal=((code>>9)&0x30); // Get palette pointer
\r
724 for (; width; width--,sx+=8,tile+=delta)
\r
726 if(sx<=0) continue;
\r
727 if(sx>=328) break; // Offscreen
\r
729 tile&=0x7fff; // Clip tile address
\r
730 if (code&0x0800) TileFlip(sx,tile,pal);
\r
731 else TileNorm(sx,tile,pal);
\r
736 static void DrawAllSpritesInterlace(int pri, int sh)
\r
738 struct PicoVideo *pvid=&Pico.video;
\r
739 int i,u,table,link=0,sline=DrawScanline<<1;
\r
740 unsigned int *sprites[80]; // Sprite index
\r
742 table=pvid->reg[5]&0x7f;
\r
743 if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode
\r
744 table<<=8; // Get sprite table address/2
\r
746 for (i=u=0; u < 80 && i < 21; u++)
\r
748 unsigned int *sprite;
\r
749 int code, sx, sy, height;
\r
751 sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
\r
756 if(((sx>>15)&1) != pri) goto nextsprite; // wrong priority sprite
\r
758 // check if it is on this line
\r
759 sy = (code&0x3ff)-0x100;
\r
760 height = (((code>>24)&3)+1)<<4;
\r
761 if(sline < sy || sline >= sy+height) goto nextsprite; // no
\r
763 // check if sprite is not hidden offscreen
\r
764 sx = (sx>>16)&0x1ff;
\r
765 sx -= 0x78; // Get X coordinate + 8
\r
766 if(sx <= -8*3 || sx >= 328) goto nextsprite;
\r
768 // sprite is good, save it's pointer
\r
769 sprites[i++]=sprite;
\r
772 // Find next sprite
\r
773 link=(code>>16)&0x7f;
\r
774 if(!link) break; // End of sprites
\r
777 // Go through sprites backwards:
\r
778 for (i-- ;i>=0; i--)
\r
779 DrawSpriteInterlace(sprites[i]);
\r
783 #ifndef _ASM_DRAW_C
\r
785 * s/h drawing: lo_layers|40, lo_sprites|40 && mark_op,
\r
786 * hi_layers&=~40, hi_sprites
\r
788 * Index + 0 : hhhhvvvv ----hhvv yyyyyyyy yyyyyyyy // v, h: vert./horiz. size
\r
789 * Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
\r
791 static void DrawSpritesSHi(unsigned char *sprited)
\r
793 int (*fTileFunc)(int sx,int addr,int pal);
\r
797 cnt = sprited[0] & 0x7f;
\r
798 if (cnt == 0) return;
\r
802 // Go through sprites backwards:
\r
803 for (cnt--; cnt >= 0; cnt--)
\r
805 int *sprite, code, pal, tile, sx, sy;
\r
806 int offs, delta, width, height, row;
\r
808 offs = (p[cnt] & 0x7f) * 2;
\r
809 sprite = HighPreSpr + offs;
\r
811 pal = (code>>9)&0x30;
\r
815 if (code & 0x8000) // hi priority
\r
817 if (code&0x800) fTileFunc=TileFlipSH;
\r
818 else fTileFunc=TileNormSH;
\r
820 if (code&0x800) fTileFunc=TileFlipSH_onlyop_lp;
\r
821 else fTileFunc=TileNormSH_onlyop_lp;
\r
824 if (!(code & 0x8000)) continue; // non-operator low sprite, already drawn
\r
825 if (code&0x800) fTileFunc=TileFlip;
\r
826 else fTileFunc=TileNorm;
\r
829 // parse remaining sprite data
\r
833 height=(sy>>24)&7; // Width and height in tiles
\r
834 sy=(sy<<16)>>16; // Y
\r
836 row=DrawScanline-sy; // Row of the sprite we are on
\r
838 if (code&0x1000) row=(height<<3)-1-row; // Flip Y
\r
840 tile=code + (row>>3); // Tile number increases going down
\r
841 delta=height; // Delta to increase tile by going right
\r
842 if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
\r
844 tile &= 0x7ff; tile<<=4; tile+=(row&7)<<1; // Tile address
\r
845 delta<<=4; // Delta of address
\r
847 for (; width; width--,sx+=8,tile+=delta)
\r
849 if(sx<=0) continue;
\r
850 if(sx>=328) break; // Offscreen
\r
852 tile&=0x7fff; // Clip tile address
\r
853 fTileFunc(sx,tile,pal);
\r
857 #endif // !_ASM_DRAW_C
\r
859 static void DrawSpritesHiAS(unsigned char *sprited, int sh)
\r
861 int (*fTileFunc)(int sx,int addr,int pal);
\r
863 int entry, cnt, sh_cnt = 0;
\r
865 cnt = sprited[0] & 0x7f;
\r
866 if (cnt == 0) return;
\r
868 rendstatus |= PDRAW_SPR_LO_ON_HI;
\r
872 // Go through sprites:
\r
873 for (entry = 0; entry < cnt; entry++)
\r
875 int *sprite, code, pal, tile, sx, sy;
\r
876 int offs, delta, width, height, row;
\r
878 offs = (p[entry] & 0x7f) * 2;
\r
879 sprite = HighPreSpr + offs;
\r
881 pal = (code>>9)&0x30;
\r
883 if (code & 0x8000) // hi priority
\r
885 if (sh && pal == 0x30)
\r
887 if (code&0x800) fTileFunc=TileFlipAS_noop;
\r
888 else fTileFunc=TileNormAS_noop;
\r
890 if (code&0x800) fTileFunc=TileFlipAS;
\r
891 else fTileFunc=TileNormAS;
\r
894 if (code&0x800) fTileFunc=TileFlipAS_onlymark;
\r
895 else fTileFunc=TileNormAS_onlymark;
\r
897 if (sh && pal == 0x30)
\r
898 p[sh_cnt++] = offs / 2; // re-save for sh/hi pass
\r
900 // parse remaining sprite data
\r
904 height=(sy>>24)&7; // Width and height in tiles
\r
905 sy=(sy<<16)>>16; // Y
\r
907 row=DrawScanline-sy; // Row of the sprite we are on
\r
909 if (code&0x1000) row=(height<<3)-1-row; // Flip Y
\r
911 tile=code + (row>>3); // Tile number increases going down
\r
912 delta=height; // Delta to increase tile by going right
\r
913 if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
\r
915 tile &= 0x7ff; tile<<=4; tile+=(row&7)<<1; // Tile address
\r
916 delta<<=4; // Delta of address
\r
919 for (; width; width--,sx+=8,tile+=delta)
\r
921 if(sx<=0) continue;
\r
922 if(sx>=328) break; // Offscreen
\r
924 tile&=0x7fff; // Clip tile address
\r
925 fTileFunc(sx,tile,pal);
\r
929 if (!sh || !(sprited[1]&SPRL_MAY_HAVE_OP)) return;
\r
931 /* nasty 1: remove 'sprite' flags */
\r
933 int c = 320/4/4, *zb = (int *)(HighCol+8);
\r
936 *zb++ &= 0x7f7f7f7f; *zb++ &= 0x7f7f7f7f;
\r
937 *zb++ &= 0x7f7f7f7f; *zb++ &= 0x7f7f7f7f;
\r
941 /* nasty 2: sh operator pass */
\r
942 sprited[0] = sh_cnt;
\r
943 DrawSpritesSHi(sprited);
\r
947 // Index + 0 : ----hhvv -lllllll -------y yyyyyyyy
\r
948 // Index + 4 : -------x xxxxxxxx pccvhnnn nnnnnnnn
\r
950 // Index + 0 : hhhhvvvv ----hhvv yyyyyyyy yyyyyyyy // v, h: vert./horiz. size
\r
951 // Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
\r
953 void PrepareSprites(int full)
\r
955 struct PicoVideo *pvid=&Pico.video;
\r
958 int *pd = HighPreSpr;
\r
959 int max_lines = 224, max_sprites = 80, max_width = 328;
\r
960 int max_line_sprites = 20; // 20 sprites, 40 tiles
\r
962 if (!(Pico.video.reg[12]&1))
\r
963 max_sprites = 64, max_line_sprites = 16, max_width = 264;
\r
964 if (PicoOpt & POPT_DIS_SPRITE_LIM)
\r
965 max_line_sprites = MAX_LINE_SPRITES;
\r
967 if (pvid->reg[1]&8) max_lines = 240;
\r
968 sh = Pico.video.reg[0xC]&8; // shadow/hilight?
\r
970 table=pvid->reg[5]&0x7f;
\r
971 if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode
\r
972 table<<=8; // Get sprite table address/2
\r
977 // updates: tilecode, sx
\r
978 for (u=0; u < max_sprites && (pack = *pd); u++, pd+=2)
\r
980 unsigned int *sprite;
\r
981 int code2, sx, sy, height;
\r
983 sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
\r
985 // parse sprite info
\r
987 sx = (code2>>16)&0x1ff;
\r
988 sx -= 0x78; // Get X coordinate + 8
\r
989 sy = (pack << 16) >> 16;
\r
990 height = (pack >> 24) & 0xf;
\r
992 if (sy < max_lines && sy + (height<<3) > DrawScanline && // sprite onscreen (y)?
\r
993 (sx > -24 || sx < max_width)) // onscreen x
\r
995 int y = (sy >= DrawScanline) ? sy : DrawScanline;
\r
996 int entry = ((pd - HighPreSpr) / 2) | ((code2>>8)&0x80);
\r
997 for (; y < sy + (height<<3) && y < max_lines; y++)
\r
1000 cnt = HighLnSpr[y][0] & 0x7f;
\r
1001 if (cnt >= max_line_sprites) continue; // sprite limit?
\r
1003 for (i = 0; i < cnt; i++)
\r
1004 if (((HighLnSpr[y][3+i] ^ entry) & 0x7f) == 0) goto found;
\r
1006 // this sprite was previously missing
\r
1007 HighLnSpr[y][3+cnt] = entry;
\r
1008 HighLnSpr[y][0] = cnt + 1;
\r
1011 HighLnSpr[y][1] |= SPRL_HAVE_HI;
\r
1012 else HighLnSpr[y][1] |= SPRL_HAVE_LO;
\r
1016 code2 &= ~0xfe000000;
\r
1017 code2 -= 0x00780000; // Get X coordinate + 8 in upper 16 bits
\r
1020 // Find next sprite
\r
1021 link=(sprite[0]>>16)&0x7f;
\r
1022 if (!link) break; // End of sprites
\r
1027 for (u = 0; u < max_lines; u++)
\r
1028 *((int *)&HighLnSpr[u][0]) = 0;
\r
1030 for (u = 0; u < max_sprites; u++)
\r
1032 unsigned int *sprite;
\r
1033 int code, code2, sx, sy, hv, height, width;
\r
1035 sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
\r
1037 // parse sprite info
\r
1039 sy = (code&0x1ff)-0x80;
\r
1040 hv = (code>>24)&0xf;
\r
1041 height = (hv&3)+1;
\r
1043 width = (hv>>2)+1;
\r
1044 code2 = sprite[1];
\r
1045 sx = (code2>>16)&0x1ff;
\r
1046 sx -= 0x78; // Get X coordinate + 8
\r
1048 if (sy < max_lines && sy + (height<<3) > DrawScanline) // sprite onscreen (y)?
\r
1050 int entry, y, sx_min, onscr_x, maybe_op = 0;
\r
1052 sx_min = 8-(width<<3);
\r
1053 onscr_x = sx_min < sx && sx < max_width;
\r
1054 if (sh && (code2 & 0x6000) == 0x6000)
\r
1055 maybe_op = SPRL_MAY_HAVE_OP;
\r
1057 entry = ((pd - HighPreSpr) / 2) | ((code2>>8)&0x80);
\r
1058 y = (sy >= DrawScanline) ? sy : DrawScanline;
\r
1059 for (; y < sy + (height<<3) && y < max_lines; y++)
\r
1061 unsigned char *p = &HighLnSpr[y][0];
\r
1063 if (cnt >= max_line_sprites) continue; // sprite limit?
\r
1065 if (p[2] >= max_line_sprites*2) { // tile limit?
\r
1071 if (sx == -0x78) {
\r
1073 p[0] |= 0x80; // masked, no more sprites for this line
\r
1076 // must keep the first sprite even if it's offscreen, for masking
\r
1077 if (cnt > 0 && !onscr_x) continue; // offscreen x
\r
1081 p[1] |= (entry & 0x80) ? SPRL_HAVE_HI : SPRL_HAVE_LO;
\r
1082 p[1] |= maybe_op; // there might be op sprites on this line
\r
1083 if (cnt > 0 && (code2 & 0x8000) && !(p[3+cnt-1]&0x80))
\r
1084 p[1] |= SPRL_LO_ABOVE_HI;
\r
1088 *pd++ = (width<<28)|(height<<24)|(hv<<16)|((unsigned short)sy);
\r
1089 *pd++ = (sx<<16)|((unsigned short)code2);
\r
1091 // Find next sprite
\r
1092 link=(code>>16)&0x7f;
\r
1093 if (!link) break; // End of sprites
\r
1098 for (u = 0; u < max_lines; u++)
\r
1101 printf("c%03i: %2i, %2i: ", u, HighLnSpr[u][0] & 0x7f, HighLnSpr[u][2]);
\r
1102 for (y = 0; y < HighLnSpr[u][0] & 0x7f; y++)
\r
1103 printf(" %i", HighLnSpr[u][y+3]);
\r
1110 #ifndef _ASM_DRAW_C
\r
1111 static void DrawAllSprites(unsigned char *sprited, int prio, int sh)
\r
1113 int rs = rendstatus;
\r
1117 if (rs & (PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES)) {
\r
1118 //elprintf(EL_STATUS, "PrepareSprites(%i)", (rs>>4)&1);
\r
1119 PrepareSprites(rs & PDRAW_DIRTY_SPRITES);
\r
1120 rendstatus = rs & ~(PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES);
\r
1123 cnt = sprited[0] & 0x7f;
\r
1124 if (cnt == 0) return;
\r
1128 // Go through sprites backwards:
\r
1129 for (cnt--; cnt >= 0; cnt--)
\r
1132 if ((p[cnt] >> 7) != prio) continue;
\r
1133 offs = (p[cnt]&0x7f) * 2;
\r
1134 DrawSprite(HighPreSpr + offs, sh);
\r
1139 // --------------------------------------------
\r
1141 void BackFill(int reg7, int sh)
\r
1143 unsigned int back;
\r
1145 // Start with a blank scanline (background colour):
\r
1151 memset32((int *)(HighCol+8), back, 320/4);
\r
1155 // --------------------------------------------
\r
1157 unsigned short HighPal[0x100];
\r
1159 #ifndef _ASM_DRAW_C
\r
1160 void PicoDoHighPal555(int sh)
\r
1162 unsigned int *spal, *dpal;
\r
1163 unsigned short *pal=HighPal;
\r
1166 Pico.m.dirtyPal = 0;
\r
1168 spal = (void *)Pico.cram;
\r
1169 dpal = (void *)HighPal;
\r
1171 for (i = 0; i < 0x40; i++) {
\r
1172 unsigned int t = spal[i];
\r
1174 t = ((t & 0x000e000e)<< 1) | ((t & 0x00e000e0)<<3) | ((t & 0x0e000e00)<<4);
\r
1176 t = ((t & 0x000e000e)<<12) | ((t & 0x00e000e0)<<3) | ((t & 0x0e000e00)>>7);
\r
1178 t |= (t >> 3) & 0x18e318e3;
\r
1184 // shadowed pixels
\r
1185 for (i = 0x3f; i >= 0; i--)
\r
1186 pal[0x40|i] = pal[0xc0|i] = (unsigned short)((pal[i]>>1)&0x738e);
\r
1187 // hilighted pixels
\r
1188 for (i = 0x3f; i >= 0; i--) {
\r
1189 t=pal[i]&0xe71c;t+=0x4208;if(t&0x20)t|=0x1c;if(t&0x800)t|=0x700;if(t&0x10000)t|=0xe000;t&=0xe71c;
\r
1190 pal[0x80|i]=(unsigned short)t;
\r
1195 static void FinalizeLineBGR444(int sh)
\r
1197 unsigned short *pd=DrawLineDest;
\r
1198 unsigned char *ps=HighCol+8;
\r
1199 unsigned short *pal=Pico.cram;
\r
1200 int len, i, t, mask=0xff;
\r
1202 if (Pico.video.reg[12]&1) {
\r
1205 if(!(PicoOpt&POPT_DIS_32C_BORDER)) pd+=32;
\r
1211 if(Pico.m.dirtyPal) {
\r
1212 blockcpy(pal, Pico.cram, 0x40*2);
\r
1213 // shadowed pixels
\r
1214 for(i = 0x3f; i >= 0; i--)
\r
1215 pal[0x40|i] = pal[0xc0|i] = (unsigned short)((pal[i]>>1)&0x0777);
\r
1216 // hilighted pixels
\r
1217 for(i = 0x3f; i >= 0; i--) {
\r
1218 t=pal[i]&0xeee;t+=0x444;if(t&0x10)t|=0xe;if(t&0x100)t|=0xe0;if(t&0x1000)t|=0xe00;t&=0xeee;
\r
1219 pal[0x80|i]=(unsigned short)t;
\r
1221 Pico.m.dirtyPal = 0;
\r
1225 if (!sh && (rendstatus & PDRAW_SPR_LO_ON_HI))
\r
1226 mask=0x3f; // accurate sprites
\r
1228 for(i = 0; i < len; i++)
\r
1229 pd[i] = pal[ps[i] & mask];
\r
1233 void FinalizeLineRGB555(int sh)
\r
1235 unsigned short *pd=DrawLineDest;
\r
1236 unsigned char *ps=HighCol+8;
\r
1237 unsigned short *pal=HighPal;
\r
1240 if (Pico.m.dirtyPal)
\r
1241 PicoDoHighPal555(sh);
\r
1243 if (Pico.video.reg[12]&1) {
\r
1246 if (!(PicoOpt&POPT_DIS_32C_BORDER)) pd+=32;
\r
1253 if (!sh && (rendstatus & PDRAW_SPR_LO_ON_HI))
\r
1254 mask=0x3f; // accurate sprites, upper bits are priority stuff
\r
1256 for (i = 0; i < len; i++)
\r
1257 pd[i] = pal[ps[i] & mask];
\r
1259 extern void amips_clut(unsigned short *dst, unsigned char *src, unsigned short *pal, int count);
\r
1260 extern void amips_clut_6bit(unsigned short *dst, unsigned char *src, unsigned short *pal, int count);
\r
1261 if (!sh && (rendstatus & PDRAW_SPR_LO_ON_HI))
\r
1262 amips_clut_6bit(pd, ps, pal, len);
\r
1263 else amips_clut(pd, ps, pal, len);
\r
1269 static void FinalizeLine8bit(int sh)
\r
1271 unsigned char *pd = DrawLineDest;
\r
1272 int len, rs = rendstatus;
\r
1273 static int dirty_count;
\r
1275 if (!sh && Pico.m.dirtyPal == 1)
\r
1277 // a hack for mid-frame palette changes
\r
1278 if (!(rs & PDRAW_SONIC_MODE))
\r
1280 else dirty_count++;
\r
1281 rs |= PDRAW_SONIC_MODE;
\r
1283 if (dirty_count == 3) {
\r
1284 blockcpy(HighPal, Pico.cram, 0x40*2);
\r
1285 } else if (dirty_count == 11) {
\r
1286 blockcpy(HighPal+0x40, Pico.cram, 0x40*2);
\r
1290 if (Pico.video.reg[12]&1) {
\r
1293 if (!(PicoOpt & POPT_DIS_32C_BORDER))
\r
1298 if (!sh && (rs & PDRAW_SONIC_MODE)) {
\r
1299 if (dirty_count >= 11) {
\r
1300 blockcpy_or(pd, HighCol+8, len, 0x80);
\r
1302 blockcpy_or(pd, HighCol+8, len, 0x40);
\r
1305 blockcpy(pd, HighCol+8, len);
\r
1309 static void (*FinalizeLine)(int sh);
\r
1311 // --------------------------------------------
\r
1313 static int DrawDisplay(int sh)
\r
1315 unsigned char *sprited = &HighLnSpr[DrawScanline][0];
\r
1316 struct PicoVideo *pvid=&Pico.video;
\r
1317 int win=0,edge=0,hvwind=0;
\r
1318 int maxw,maxcells;
\r
1320 rendstatus &= ~(PDRAW_SHHI_DONE|PDRAW_PLANE_HI_PRIO);
\r
1322 if (pvid->reg[12]&1) {
\r
1323 maxw = 328; maxcells = 40;
\r
1325 maxw = 264; maxcells = 32;
\r
1328 // Find out if the window is on this line:
\r
1329 win=pvid->reg[0x12];
\r
1330 edge=(win&0x1f)<<3;
\r
1332 if (win&0x80) { if (DrawScanline>=edge) hvwind=1; }
\r
1333 else { if (DrawScanline< edge) hvwind=1; }
\r
1335 if (!hvwind) // we might have a vertical window here
\r
1337 win=pvid->reg[0x11];
\r
1340 if (!edge) hvwind=1;
\r
1341 else if(edge < (maxcells>>1)) hvwind=2;
\r
1344 else if(edge < (maxcells>>1)) hvwind=2;
\r
1349 /* - layer B low - */
\r
1350 if (PicoDrawMask & PDRAW_LAYERB_ON)
\r
1351 DrawLayer(1|(sh<<1), HighCacheB, 0, maxcells);
\r
1352 /* - layer A low - */
\r
1353 if (!(PicoDrawMask & PDRAW_LAYERA_ON));
\r
1354 else if (hvwind == 1)
\r
1355 DrawWindow(0, maxcells>>1, 0, sh);
\r
1356 else if (hvwind == 2) {
\r
1357 DrawLayer(0|(sh<<1), HighCacheA, (win&0x80) ? 0 : edge<<1, (win&0x80) ? edge<<1 : maxcells);
\r
1358 DrawWindow( (win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 0, sh);
\r
1360 DrawLayer(0|(sh<<1), HighCacheA, 0, maxcells);
\r
1361 /* - sprites low - */
\r
1362 if (!(PicoDrawMask & PDRAW_SPRITES_LOW_ON));
\r
1363 else if (rendstatus & PDRAW_INTERLACE)
\r
1364 DrawAllSpritesInterlace(0, sh);
\r
1365 else if (sprited[1] & SPRL_HAVE_LO)
\r
1366 DrawAllSprites(sprited, 0, sh);
\r
1368 /* - layer B hi - */
\r
1369 if ((PicoDrawMask & PDRAW_LAYERB_ON) && HighCacheB[0])
\r
1370 DrawTilesFromCache(HighCacheB, sh, maxw);
\r
1371 /* - layer A hi - */
\r
1372 if (!(PicoDrawMask & PDRAW_LAYERA_ON));
\r
1373 else if (hvwind == 1)
\r
1374 DrawWindow(0, maxcells>>1, 1, sh);
\r
1375 else if (hvwind == 2) {
\r
1376 if (HighCacheA[0]) DrawTilesFromCache(HighCacheA, sh, (win&0x80) ? edge<<4 : maxw);
\r
1377 DrawWindow((win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 1, sh);
\r
1379 if (HighCacheA[0]) DrawTilesFromCache(HighCacheA, sh, maxw);
\r
1380 /* - sprites hi - */
\r
1381 if (!(PicoDrawMask & PDRAW_SPRITES_HI_ON));
\r
1382 else if (rendstatus & PDRAW_INTERLACE)
\r
1383 DrawAllSpritesInterlace(1, sh);
\r
1384 // have sprites without layer pri bit ontop of sprites with that bit
\r
1385 else if ((sprited[1] & 0xd0) == 0xd0 && (PicoOpt & POPT_ACC_SPRITES))
\r
1386 DrawSpritesHiAS(sprited, sh);
\r
1387 else if (sh && (sprited[1] & SPRL_MAY_HAVE_OP))
\r
1388 DrawSpritesSHi(sprited);
\r
1389 else if (sprited[1] & SPRL_HAVE_HI)
\r
1390 DrawAllSprites(sprited, 1, 0);
\r
1395 for (a = 0, c = HighCacheA; *c; c++, a++);
\r
1396 for (b = 0, c = HighCacheB; *c; c++, b++);
\r
1397 printf("%i:%03i: a=%i, b=%i\n", Pico.m.frame_count, DrawScanline, a, b);
\r
1404 // MUST be called every frame
\r
1405 PICO_INTERNAL void PicoFrameStart(void)
\r
1407 // prepare to do this frame
\r
1409 if ((Pico.video.reg[12]&6) == 6)
\r
1410 rendstatus |= PDRAW_INTERLACE; // interlace mode
\r
1411 if (Pico.video.reg[1] & 8)
\r
1412 rendstatus |= PDRAW_240LINES;
\r
1415 skip_next_line = 0;
\r
1417 if (rendstatus != rendstatus_old) {
\r
1418 rendstatus_old = rendstatus;
\r
1419 emu_video_mode_change((rendstatus & PDRAW_240LINES) ? 0 : 8,
\r
1420 (rendstatus & PDRAW_240LINES) ? 240 : 224,
\r
1421 (Pico.video.reg[12] & 1) ? 0 : 1);
\r
1424 if (PicoOpt & POPT_ALT_RENDERER)
\r
1427 if (Pico.m.dirtyPal)
\r
1428 Pico.m.dirtyPal = 2; // reset dirty if needed
\r
1429 PrepareSprites(1);
\r
1432 static void DrawBlankedLine(int line, int offs)
\r
1434 int sh = (Pico.video.reg[0xC]&8)>>3; // shadow/hilight?
\r
1436 if (PicoScanBegin != NULL)
\r
1437 PicoScanBegin(line + offs);
\r
1439 BackFill(Pico.video.reg[7], sh);
\r
1441 if (FinalizeLine != NULL)
\r
1444 if (PicoScanEnd != NULL)
\r
1445 PicoScanEnd(line + offs);
\r
1448 static void PicoLine(int line, int offs)
\r
1451 if (skip_next_line > 0) {
\r
1456 sh=(Pico.video.reg[0xC]&8)>>3; // shadow/hilight?
\r
1458 DrawScanline = line;
\r
1459 if (PicoScanBegin != NULL)
\r
1460 skip_next_line = PicoScanBegin(line + offs);
\r
1463 BackFill(Pico.video.reg[7], sh);
\r
1464 if (Pico.video.reg[1]&0x40)
\r
1467 if (FinalizeLine != NULL)
\r
1470 if (PicoScanEnd != NULL)
\r
1471 skip_next_line = PicoScanEnd(line + offs);
\r
1474 void PicoDrawSync(int to, int blank_last_line)
\r
1476 int line, offs = 0;
\r
1478 if (!(rendstatus & PDRAW_240LINES))
\r
1481 for (line = DrawScanline; line < to; line++)
\r
1483 #if !CAN_HANDLE_240_LINES
\r
1484 if (line >= 224) break;
\r
1486 PicoLine(line, offs);
\r
1489 #if !CAN_HANDLE_240_LINES
\r
1490 if (line >= 224) {
\r
1491 DrawScanline = 240;
\r
1499 if (blank_last_line)
\r
1500 DrawBlankedLine(line, offs);
\r
1501 else PicoLine(line, offs);
\r
1504 DrawScanline = line;
\r
1507 void PicoDrawSetColorFormat(int which)
\r
1511 case 2: FinalizeLine = FinalizeLine8bit; break;
\r
1512 case 1: FinalizeLine = FinalizeLineRGB555; break;
\r
1513 case 0: FinalizeLine = FinalizeLineBGR444; break;
\r
1514 default:FinalizeLine = NULL; break;
\r
1516 PicoDrawSetColorFormatMode4(which);
\r
1517 #if OVERRIDE_HIGHCOL
\r
1519 HighCol=DefHighCol;
\r