--- /dev/null
+// This is part of Pico Library\r
+\r
+// (c) Copyright 2004 Dave, All rights reserved.\r
+// (c) Copyright 2006 notaz, All rights reserved.\r
+// Free for non-commercial use.\r
+\r
+// For commercial use, separate licencing terms must be obtained.\r
+\r
+\r
+#include "PicoInt.h"\r
+#ifndef __GNUC__\r
+#pragma warning (disable:4706) // Disable assignment within conditional\r
+#endif\r
+\r
+int (*PicoScan)(unsigned int num, void *data)=NULL;\r
+\r
+//unsigned short DefOutBuff[320*2];\r
+unsigned char HighCol[320*2];\r
+static int HighCacheA[41+1]; // caches for high layers\r
+static int HighCacheB[41+1];\r
+static int HighCacheS[80+1]; // and sprites\r
+static int HighPreSpr[80*2+1]; // slightly preprocessed sprites\r
+char HighSprZ[320+8+8]; // Z-buffer for accurate sprites and shadow/hilight mode\r
+ // (if bit 7 == 0, sh caused by tile; if bit 6 == 0 pixel must be shadowed, else hilighted, if bit5 == 1)\r
+// lsb->msb: moved sprites, all window tiles don't use same priority, accurate sprites (copied from PicoOpt), interlace\r
+// dirty sprites, sonic mode, 16bit mode\r
+int rendstatus=0x40;\r
+void *DrawLineDest=HighCol; // pointer to dest buffer where to draw this line to\r
+unsigned char *DrawLineInt=HighCol; // dest for internal code\r
+int Scanline=0; // Scanline\r
+\r
+static int SpriteBlocks;\r
+//unsigned short ppt[] = { 0x0f11, 0x0ff1, 0x01f1, 0x011f, 0x01ff, 0x0f1f, 0x0f0e, 0x0e7c };\r
+\r
+struct TileStrip\r
+{\r
+ int nametab; // Position in VRAM of name table (for this tile line)\r
+ int line; // Line number in pixels 0x000-0x3ff within the virtual tilemap \r
+ int hscroll; // Horizontal scroll value in pixels for the line\r
+ int xmask; // X-Mask (0x1f - 0x7f) for horizontal wraparound in the tilemap\r
+ int *hc; // cache for high tile codes and their positions\r
+ int cells; // cells (tiles) to draw (32 col mode doesn't need to update whole 320)\r
+};\r
+\r
+// stuff available in asm:\r
+#ifdef _ASM_DRAW_C\r
+void DrawWindow(int tstart, int tend, int prio, int sh);\r
+void BackFill(int reg7, int sh);\r
+void DrawSprite(int *sprite, int **hc, int sh);\r
+void DrawTilesFromCache(int *hc, int sh);\r
+void DrawSpritesFromCache(int *hc, int sh);\r
+void DrawLayer(int plane, int *hcache, int maxcells, int sh);\r
+void FinalizeLineBGR444(int sh);\r
+void FinalizeLineRGB555(int sh);\r
+void blockcpy_or(void *dst, void *src, size_t n, int pat);\r
+#else\r
+// utility\r
+void blockcpy_or(void *dst, void *src, size_t n, int pat)\r
+{\r
+ unsigned char *pd = dst, *ps = src;\r
+ for (; n; n--)\r
+ *pd++ = (unsigned char) (*ps++ | pat);\r
+}\r
+#endif\r
+\r
+\r
+static int TileNorm(int sx,int addr,int pal)\r
+{\r
+ unsigned char *pd = DrawLineInt+sx;\r
+ unsigned int pack=0; unsigned int t=0;\r
+\r
+ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
+ if (pack)\r
+ {\r
+ t=pack&0x0000f000; if (t) pd[0]=(unsigned char)(pal|(t>>12));\r
+ t=pack&0x00000f00; if (t) pd[1]=(unsigned char)(pal|(t>> 8));\r
+ t=pack&0x000000f0; if (t) pd[2]=(unsigned char)(pal|(t>> 4));\r
+ t=pack&0x0000000f; if (t) pd[3]=(unsigned char)(pal|(t ));\r
+ t=pack&0xf0000000; if (t) pd[4]=(unsigned char)(pal|(t>>28));\r
+ t=pack&0x0f000000; if (t) pd[5]=(unsigned char)(pal|(t>>24));\r
+ t=pack&0x00f00000; if (t) pd[6]=(unsigned char)(pal|(t>>20));\r
+ t=pack&0x000f0000; if (t) pd[7]=(unsigned char)(pal|(t>>16));\r
+ return 0;\r
+ }\r
+\r
+ return 1; // Tile blank\r
+}\r
+\r
+static int TileFlip(int sx,int addr,int pal)\r
+{\r
+ unsigned char *pd = DrawLineInt+sx;\r
+ unsigned int pack=0; unsigned int t=0;\r
+\r
+ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
+ if (pack)\r
+ {\r
+ t=pack&0x000f0000; if (t) pd[0]=(unsigned char)(pal|(t>>16));\r
+ t=pack&0x00f00000; if (t) pd[1]=(unsigned char)(pal|(t>>20));\r
+ t=pack&0x0f000000; if (t) pd[2]=(unsigned char)(pal|(t>>24));\r
+ t=pack&0xf0000000; if (t) pd[3]=(unsigned char)(pal|(t>>28));\r
+ t=pack&0x0000000f; if (t) pd[4]=(unsigned char)(pal|(t ));\r
+ t=pack&0x000000f0; if (t) pd[5]=(unsigned char)(pal|(t>> 4));\r
+ t=pack&0x00000f00; if (t) pd[6]=(unsigned char)(pal|(t>> 8));\r
+ t=pack&0x0000f000; if (t) pd[7]=(unsigned char)(pal|(t>>12));\r
+ return 0;\r
+ }\r
+ return 1; // Tile blank\r
+}\r
+\r
+\r
+// tile renderers for hacky operator sprite support\r
+#define sh_pix(x) \\r
+ if(!t); \\r
+ else if(t==0xe) pd[x]=(unsigned char)((pd[x]&0x3f)|0x80); /* hilight */ \\r
+ else if(t==0xf) pd[x]=(unsigned char)((pd[x]&0x3f)|0xc0); /* shadow */ \\r
+ else pd[x]=(unsigned char)(pal|t);\r
+\r
+#ifndef _ASM_DRAW_C\r
+static int TileNormSH(int sx,int addr,int pal)\r
+{\r
+ unsigned int pack=0; unsigned int t=0;\r
+ unsigned char *pd = DrawLineInt+sx;\r
+\r
+ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
+ if (pack)\r
+ {\r
+ t=(pack&0x0000f000)>>12; sh_pix(0);\r
+ t=(pack&0x00000f00)>> 8; sh_pix(1);\r
+ t=(pack&0x000000f0)>> 4; sh_pix(2);\r
+ t=(pack&0x0000000f) ; sh_pix(3);\r
+ t=(pack&0xf0000000)>>28; sh_pix(4);\r
+ t=(pack&0x0f000000)>>24; sh_pix(5);\r
+ t=(pack&0x00f00000)>>20; sh_pix(6);\r
+ t=(pack&0x000f0000)>>16; sh_pix(7);\r
+ return 0;\r
+ }\r
+\r
+ return 1; // Tile blank\r
+}\r
+\r
+static int TileFlipSH(int sx,int addr,int pal)\r
+{\r
+ unsigned int pack=0; unsigned int t=0;\r
+ unsigned char *pd = DrawLineInt+sx;\r
+\r
+ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
+ if (pack)\r
+ {\r
+ t=(pack&0x000f0000)>>16; sh_pix(0);\r
+ t=(pack&0x00f00000)>>20; sh_pix(1);\r
+ t=(pack&0x0f000000)>>24; sh_pix(2);\r
+ t=(pack&0xf0000000)>>28; sh_pix(3);\r
+ t=(pack&0x0000000f) ; sh_pix(4);\r
+ t=(pack&0x000000f0)>> 4; sh_pix(5);\r
+ t=(pack&0x00000f00)>> 8; sh_pix(6);\r
+ t=(pack&0x0000f000)>>12; sh_pix(7);\r
+ return 0;\r
+ }\r
+ return 1; // Tile blank\r
+}\r
+#endif\r
+\r
+static int TileNormZ(int sx,int addr,int pal,int zval)\r
+{\r
+ unsigned int pack=0; unsigned int t=0;\r
+ unsigned char *pd = DrawLineInt+sx;\r
+ char *zb = HighSprZ+sx;\r
+ int collision = 0, zb_s;\r
+\r
+ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
+ if (pack)\r
+ {\r
+ t=pack&0x0000f000; if(t) { zb_s=zb[0]; if(zb_s) collision=1; if(zval>zb_s) { pd[0]=(unsigned char)(pal|(t>>12)); zb[0]=(char)zval; } }\r
+ t=pack&0x00000f00; if(t) { zb_s=zb[1]; if(zb_s) collision=1; if(zval>zb_s) { pd[1]=(unsigned char)(pal|(t>> 8)); zb[1]=(char)zval; } }\r
+ t=pack&0x000000f0; if(t) { zb_s=zb[2]; if(zb_s) collision=1; if(zval>zb_s) { pd[2]=(unsigned char)(pal|(t>> 4)); zb[2]=(char)zval; } }\r
+ t=pack&0x0000000f; if(t) { zb_s=zb[3]; if(zb_s) collision=1; if(zval>zb_s) { pd[3]=(unsigned char)(pal|(t )); zb[3]=(char)zval; } }\r
+ t=pack&0xf0000000; if(t) { zb_s=zb[4]; if(zb_s) collision=1; if(zval>zb_s) { pd[4]=(unsigned char)(pal|(t>>28)); zb[4]=(char)zval; } }\r
+ t=pack&0x0f000000; if(t) { zb_s=zb[5]; if(zb_s) collision=1; if(zval>zb_s) { pd[5]=(unsigned char)(pal|(t>>24)); zb[5]=(char)zval; } }\r
+ t=pack&0x00f00000; if(t) { zb_s=zb[6]; if(zb_s) collision=1; if(zval>zb_s) { pd[6]=(unsigned char)(pal|(t>>20)); zb[6]=(char)zval; } }\r
+ t=pack&0x000f0000; if(t) { zb_s=zb[7]; if(zb_s) collision=1; if(zval>zb_s) { pd[7]=(unsigned char)(pal|(t>>16)); zb[7]=(char)zval; } }\r
+ if(collision) Pico.video.status|=0x20;\r
+ return 0;\r
+ }\r
+\r
+ return 1; // Tile blank\r
+}\r
+\r
+static int TileFlipZ(int sx,int addr,int pal,int zval)\r
+{\r
+ unsigned int pack=0; unsigned int t=0;\r
+ unsigned char *pd = DrawLineInt+sx;\r
+ char *zb = HighSprZ+sx;\r
+ int collision = 0, zb_s;\r
+\r
+ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
+ if (pack)\r
+ {\r
+ t=pack&0x000f0000; if(t) { zb_s=zb[0]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[0]=(unsigned char)(pal|(t>>16)); zb[0]=(char)zval; } }\r
+ t=pack&0x00f00000; if(t) { zb_s=zb[1]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[1]=(unsigned char)(pal|(t>>20)); zb[1]=(char)zval; } }\r
+ t=pack&0x0f000000; if(t) { zb_s=zb[2]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[2]=(unsigned char)(pal|(t>>24)); zb[2]=(char)zval; } }\r
+ t=pack&0xf0000000; if(t) { zb_s=zb[3]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[3]=(unsigned char)(pal|(t>>28)); zb[3]=(char)zval; } }\r
+ t=pack&0x0000000f; if(t) { zb_s=zb[4]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[4]=(unsigned char)(pal|(t )); zb[4]=(char)zval; } }\r
+ t=pack&0x000000f0; if(t) { zb_s=zb[5]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[5]=(unsigned char)(pal|(t>> 4)); zb[5]=(char)zval; } }\r
+ t=pack&0x00000f00; if(t) { zb_s=zb[6]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[6]=(unsigned char)(pal|(t>> 8)); zb[6]=(char)zval; } }\r
+ t=pack&0x0000f000; if(t) { zb_s=zb[7]&0x1f; if(zb_s) collision=1; if(zval>zb_s) { pd[7]=(unsigned char)(pal|(t>>12)); zb[7]=(char)zval; } }\r
+ if(collision) Pico.video.status|=0x20;\r
+ return 0;\r
+ }\r
+ return 1; // Tile blank\r
+}\r
+\r
+\r
+#define sh_pixZ(x) \\r
+ if(t) { \\r
+ if(zb[x]) collision=1; \\r
+ if(zval>zb[x]) { \\r
+ if (t==0xe) { pd[x]=(unsigned char)((pd[x]&0x3f)|0x80); /* hilight */ } \\r
+ else if(t==0xf) { pd[x]=(unsigned char)((pd[x]&0x3f)|0xc0); /* shadow */ } \\r
+ else { zb[x]=(char)zval; pd[x]=(unsigned char)(pal|t); } \\r
+ } \\r
+ }\r
+\r
+static int TileNormZSH(int sx,int addr,int pal,int zval)\r
+{\r
+ unsigned int pack=0; unsigned int t=0;\r
+ unsigned char *pd = DrawLineInt+sx;\r
+ char *zb = HighSprZ+sx;\r
+ int collision = 0;\r
+\r
+ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
+ if (pack)\r
+ {\r
+ t=(pack&0x0000f000)>>12; sh_pixZ(0);\r
+ t=(pack&0x00000f00)>> 8; sh_pixZ(1);\r
+ t=(pack&0x000000f0)>> 4; sh_pixZ(2);\r
+ t=(pack&0x0000000f) ; sh_pixZ(3);\r
+ t=(pack&0xf0000000)>>28; sh_pixZ(4);\r
+ t=(pack&0x0f000000)>>24; sh_pixZ(5);\r
+ t=(pack&0x00f00000)>>20; sh_pixZ(6);\r
+ t=(pack&0x000f0000)>>16; sh_pixZ(7);\r
+ if(collision) Pico.video.status|=0x20;\r
+ return 0;\r
+ }\r
+\r
+ return 1; // Tile blank\r
+}\r
+\r
+static int TileFlipZSH(int sx,int addr,int pal,int zval)\r
+{\r
+ unsigned int pack=0; unsigned int t=0;\r
+ unsigned char *pd = DrawLineInt+sx;\r
+ char *zb = HighSprZ+sx;\r
+ int collision = 0;\r
+\r
+ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
+ if (pack)\r
+ {\r
+ t=(pack&0x000f0000)>>16; sh_pixZ(0);\r
+ t=(pack&0x00f00000)>>20; sh_pixZ(1);\r
+ t=(pack&0x0f000000)>>24; sh_pixZ(2);\r
+ t=(pack&0xf0000000)>>28; sh_pixZ(3);\r
+ t=(pack&0x0000000f) ; sh_pixZ(4);\r
+ t=(pack&0x000000f0)>> 4; sh_pixZ(5);\r
+ t=(pack&0x00000f00)>> 8; sh_pixZ(6);\r
+ t=(pack&0x0000f000)>>12; sh_pixZ(7);\r
+ if(collision) Pico.video.status|=0x20;\r
+ return 0;\r
+ }\r
+ return 1; // Tile blank\r
+}\r
+\r
+// --------------------------------------------\r
+\r
+#ifndef _ASM_DRAW_C\r
+static void DrawStrip(struct TileStrip *ts, int sh)\r
+{\r
+ int tilex=0,dx=0,ty=0,code=0,addr=0,cells;\r
+ int oldcode=-1,blank=-1; // The tile we know is blank\r
+ int pal=0;\r
+\r
+ // Draw tiles across screen:\r
+ tilex=(-ts->hscroll)>>3;\r
+ ty=(ts->line&7)<<1; // Y-Offset into tile\r
+ dx=((ts->hscroll-1)&7)+1;\r
+ cells = ts->cells;\r
+ if(dx != 8) cells++; // have hscroll, need to draw 1 cell more\r
+\r
+ for (; cells; dx+=8,tilex++,cells--)\r
+ {\r
+ int zero=0;\r
+\r
+ code=Pico.vram[ts->nametab+(tilex&ts->xmask)];\r
+ if (code==blank) continue;\r
+ if (code>>15) { // high priority tile\r
+ int cval = code | (dx<<16) | (ty<<25);\r
+ if(code&0x1000) cval^=7<<26;\r
+ *ts->hc++ = cval; // cache it\r
+ continue;\r
+ }\r
+\r
+ if (code!=oldcode) {\r
+ oldcode = code;\r
+ // Get tile address/2:\r
+ addr=(code&0x7ff)<<4;\r
+ addr+=ty;\r
+ if (code&0x1000) addr^=0xe; // Y-flip\r
+\r
+// pal=Pico.cram+((code>>9)&0x30);\r
+ pal=((code>>9)&0x30)|(sh<<6);\r
+ }\r
+\r
+ if (code&0x0800) zero=TileFlip(dx,addr,pal);\r
+ else zero=TileNorm(dx,addr,pal);\r
+\r
+ if (zero) blank=code; // We know this tile is blank now\r
+ }\r
+\r
+ // terminate the cache list\r
+ *ts->hc = 0;\r
+}\r
+#endif\r
+\r
+// this is messy\r
+#ifndef _ASM_DRAW_C\r
+static\r
+#endif\r
+void DrawStripVSRam(struct TileStrip *ts, int plane)\r
+{\r
+ int tilex=0,dx=0,ty=0,code=0,addr=0,cell=0,nametabadd=0;\r
+ int oldcode=-1,blank=-1; // The tile we know is blank\r
+ int pal=0,scan=Scanline;\r
+\r
+ // Draw tiles across screen:\r
+ tilex=(-ts->hscroll)>>3;\r
+ dx=((ts->hscroll-1)&7)+1;\r
+ if(dx != 8) {\r
+ int vscroll, line;\r
+ cell--; // have hscroll, start with negative cell\r
+ // also calculate intial VS stuff\r
+ vscroll=Pico.vsram[plane];\r
+\r
+ // Find the line in the name table\r
+ line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..\r
+ nametabadd=(line>>3)<<(ts->line>>24); // .. and shift[width]\r
+ ty=(line&7)<<1; // Y-Offset into tile\r
+ }\r
+\r
+ for (; cell < ts->cells; dx+=8,tilex++,cell++)\r
+ {\r
+ int zero=0;\r
+\r
+ if((cell&1)==0) {\r
+ int line,vscroll;\r
+ vscroll=Pico.vsram[plane+(cell&~1)];\r
+\r
+ // Find the line in the name table\r
+ line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..\r
+ nametabadd=(line>>3)<<(ts->line>>24); // .. and shift[width]\r
+ ty=(line&7)<<1; // Y-Offset into tile\r
+ }\r
+\r
+ code=Pico.vram[ts->nametab+nametabadd+(tilex&ts->xmask)];\r
+ if (code==blank) continue;\r
+ if (code>>15) { // high priority tile\r
+ int cval = code | (dx<<16) | (ty<<25);\r
+ if(code&0x1000) cval^=7<<26;\r
+ *ts->hc++ = cval; // cache it\r
+ continue;\r
+ }\r
+\r
+ if (code!=oldcode) {\r
+ oldcode = code;\r
+ // Get tile address/2:\r
+ addr=(code&0x7ff)<<4;\r
+ if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip\r
+\r
+// pal=Pico.cram+((code>>9)&0x30);\r
+ pal=((code>>9)&0x30);\r
+ }\r
+\r
+ if (code&0x0800) zero=TileFlip(dx,addr,pal);\r
+ else zero=TileNorm(dx,addr,pal);\r
+\r
+ if (zero) blank=code; // We know this tile is blank now\r
+ }\r
+\r
+ // terminate the cache list\r
+ *ts->hc = 0;\r
+}\r
+\r
+#ifndef _ASM_DRAW_C\r
+static\r
+#endif\r
+void DrawStripInterlace(struct TileStrip *ts)\r
+{\r
+ int tilex=0,dx=0,ty=0,code=0,addr=0,cells;\r
+ int oldcode=-1,blank=-1; // The tile we know is blank\r
+ int pal=0;\r
+\r
+ // Draw tiles across screen:\r
+ tilex=(-ts->hscroll)>>3;\r
+ ty=(ts->line&15)<<1; // Y-Offset into tile\r
+ dx=((ts->hscroll-1)&7)+1;\r
+ cells = ts->cells;\r
+ if(dx != 8) cells++; // have hscroll, need to draw 1 cell more\r
+\r
+ for (; cells; dx+=8,tilex++,cells--)\r
+ {\r
+ int zero=0;\r
+\r
+ code=Pico.vram[ts->nametab+(tilex&ts->xmask)];\r
+ if (code==blank) continue;\r
+ if (code>>15) { // high priority tile\r
+ int cval = (code&0xfc00) | (dx<<16) | (ty<<25);\r
+ cval|=(code&0x3ff)<<1;\r
+ if(code&0x1000) cval^=0xf<<26;\r
+ *ts->hc++ = cval; // cache it\r
+ continue;\r
+ }\r
+\r
+ if (code!=oldcode) {\r
+ oldcode = code;\r
+ // Get tile address/2:\r
+ addr=(code&0x7ff)<<5;\r
+ if (code&0x1000) addr+=30-ty; else addr+=ty; // Y-flip\r
+\r
+// pal=Pico.cram+((code>>9)&0x30);\r
+ pal=((code>>9)&0x30);\r
+ }\r
+\r
+ if (code&0x0800) zero=TileFlip(dx,addr,pal);\r
+ else zero=TileNorm(dx,addr,pal);\r
+\r
+ if (zero) blank=code; // We know this tile is blank now\r
+ }\r
+\r
+ // terminate the cache list\r
+ *ts->hc = 0;\r
+}\r
+\r
+// --------------------------------------------\r
+\r
+#ifndef _ASM_DRAW_C\r
+static void DrawLayer(int plane, int *hcache, int maxcells, int sh)\r
+{\r
+ struct PicoVideo *pvid=&Pico.video;\r
+ const char shift[4]={5,6,5,7}; // 32,64 or 128 sized tilemaps (2 is invalid)\r
+ struct TileStrip ts;\r
+ int width, height, ymask;\r
+ int vscroll, htab;\r
+\r
+ ts.hc=hcache;\r
+ ts.cells=maxcells;\r
+\r
+ // Work out the TileStrip to draw\r
+\r
+ // Work out the name table size: 32 64 or 128 tiles (0-3)\r
+ width=pvid->reg[16];\r
+ height=(width>>4)&3; width&=3;\r
+\r
+ ts.xmask=(1<<shift[width])-1; // X Mask in tiles (0x1f-0x7f)\r
+ ymask=(height<<8)|0xff; // Y Mask in pixels\r
+ if(width == 1) ymask&=0x1ff;\r
+ else if(width>1) ymask =0x0ff;\r
+\r
+ // Find name table:\r
+ if (plane==0) ts.nametab=(pvid->reg[2]&0x38)<< 9; // A\r
+ else ts.nametab=(pvid->reg[4]&0x07)<<12; // B\r
+\r
+ htab=pvid->reg[13]<<9; // Horizontal scroll table address\r
+ if ( pvid->reg[11]&2) htab+=Scanline<<1; // Offset by line\r
+ if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile\r
+ htab+=plane; // A or B\r
+\r
+ // Get horizontal scroll value, will be masked later\r
+ ts.hscroll=Pico.vram[htab&0x7fff];\r
+\r
+ if((pvid->reg[12]&6) == 6) {\r
+ // interlace mode 2\r
+ vscroll=Pico.vsram[plane]; // Get vertical scroll value\r
+\r
+ // Find the line in the name table\r
+ ts.line=(vscroll+(Scanline<<1))&((ymask<<1)|1);\r
+ ts.nametab+=(ts.line>>4)<<shift[width];\r
+\r
+ DrawStripInterlace(&ts);\r
+ } else if( pvid->reg[11]&4) {\r
+ // shit, we have 2-cell column based vscroll\r
+ // luckily this doesn't happen too often\r
+ ts.line=ymask|(shift[width]<<24); // save some stuff instead of line\r
+ DrawStripVSRam(&ts, plane);\r
+ } else {\r
+ vscroll=Pico.vsram[plane]; // Get vertical scroll value\r
+\r
+ // Find the line in the name table\r
+ ts.line=(vscroll+Scanline)&ymask;\r
+ ts.nametab+=(ts.line>>3)<<shift[width];\r
+\r
+ DrawStrip(&ts, sh);\r
+ }\r
+}\r
+\r
+\r
+// --------------------------------------------\r
+\r
+// tstart & tend are tile pair numbers\r
+static void DrawWindow(int tstart, int tend, int prio, int sh) // int *hcache\r
+{\r
+ struct PicoVideo *pvid=&Pico.video;\r
+ int tilex=0,ty=0,nametab,code=0;\r
+ int blank=-1; // The tile we know is blank\r
+\r
+ // Find name table line:\r
+ if (pvid->reg[12]&1)\r
+ {\r
+ nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode\r
+ nametab+=(Scanline>>3)<<6;\r
+ }\r
+ else\r
+ {\r
+ nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode\r
+ nametab+=(Scanline>>3)<<5;\r
+ }\r
+\r
+ tilex=tstart<<1;\r
+ tend<<=1;\r
+\r
+ ty=(Scanline&7)<<1; // Y-Offset into tile\r
+\r
+ if(!(rendstatus&2)) {\r
+ // check the first tile code\r
+ code=Pico.vram[nametab+tilex];\r
+ // if the whole window uses same priority (what is often the case), we may be able to skip this field\r
+ if((code>>15) != prio) return;\r
+ }\r
+\r
+ // Draw tiles across screen:\r
+ for (; tilex < tend; tilex++)\r
+ {\r
+ int addr=0,zero=0;\r
+ int pal;\r
+\r
+ code=Pico.vram[nametab+tilex];\r
+ if(code==blank) continue;\r
+ if((code>>15) != prio) {\r
+ rendstatus|=2;\r
+ continue;\r
+ }\r
+\r
+ pal=((code>>9)&0x30);\r
+\r
+ if(sh) {\r
+ int tmp, *zb = (int *)(DrawLineInt+8+(tilex<<3));\r
+ if(prio) {\r
+ tmp = *zb;\r
+ if(!(tmp&0x00000080)) tmp&=~0x000000c0; if(!(tmp&0x00008000)) tmp&=~0x0000c000;\r
+ if(!(tmp&0x00800000)) tmp&=~0x00c00000; if(!(tmp&0x80000000)) tmp&=~0xc0000000;\r
+ *zb++=tmp; tmp = *zb;\r
+ if(!(tmp&0x00000080)) tmp&=~0x000000c0; if(!(tmp&0x00008000)) tmp&=~0x0000c000;\r
+ if(!(tmp&0x00800000)) tmp&=~0x00c00000; if(!(tmp&0x80000000)) tmp&=~0xc0000000;\r
+ *zb++=tmp;\r
+ } else {\r
+ pal |= 0x40;\r
+ }\r
+ }\r
+\r
+ // Get tile address/2:\r
+ addr=(code&0x7ff)<<4;\r
+ if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip\r
+\r
+ if (code&0x0800) zero=TileFlip(8+(tilex<<3),addr,pal);\r
+ else zero=TileNorm(8+(tilex<<3),addr,pal);\r
+\r
+ if (zero) blank=code; // We know this tile is blank now\r
+ }\r
+\r
+ // terminate the cache list\r
+ //*hcache = 0;\r
+}\r
+\r
+// --------------------------------------------\r
+\r
+static void DrawTilesFromCache(int *hc, int sh)\r
+{\r
+ int code, addr, zero, dx;\r
+ int pal;\r
+ short blank=-1; // The tile we know is blank\r
+\r
+ // *ts->hc++ = code | (dx<<16) | (ty<<25); // cache it\r
+\r
+ while((code=*hc++)) {\r
+ if(!sh && (short)code == blank) continue;\r
+\r
+ // Get tile address/2:\r
+ addr=(code&0x7ff)<<4;\r
+ addr+=(unsigned int)code>>25; // y offset into tile\r
+ dx=(code>>16)&0x1ff;\r
+ if(sh) {\r
+ unsigned char *zb = DrawLineInt+dx;\r
+ if(!(*zb&0x80)) *zb&=0x3f; zb++; if(!(*zb&0x80)) *zb&=0x3f; zb++;\r
+ if(!(*zb&0x80)) *zb&=0x3f; zb++; if(!(*zb&0x80)) *zb&=0x3f; zb++;\r
+ if(!(*zb&0x80)) *zb&=0x3f; zb++; if(!(*zb&0x80)) *zb&=0x3f; zb++;\r
+ if(!(*zb&0x80)) *zb&=0x3f; zb++; if(!(*zb&0x80)) *zb&=0x3f; zb++;\r
+ }\r
+\r
+ pal=((code>>9)&0x30);\r
+\r
+ if (code&0x0800) zero=TileFlip(dx,addr,pal);\r
+ else zero=TileNorm(dx,addr,pal);\r
+\r
+ if(zero) blank=(short)code;\r
+ }\r
+}\r
+\r
+// --------------------------------------------\r
+\r
+// Index + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size\r
+// Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8\r
+\r
+static void DrawSprite(int *sprite, int **hc, int sh)\r
+{\r
+ int width=0,height=0;\r
+ int row=0,code=0;\r
+ int pal;\r
+ int tile=0,delta=0;\r
+ int sx, sy;\r
+ int (*fTileFunc)(int sx,int addr,int pal);\r
+\r
+ // parse the sprite data\r
+ sy=sprite[0];\r
+ code=sprite[1];\r
+ sx=code>>16; // X\r
+ width=sy>>28;\r
+ height=(sy>>24)&7; // Width and height in tiles\r
+ sy=(sy<<16)>>16; // Y\r
+\r
+ row=Scanline-sy; // Row of the sprite we are on\r
+\r
+ if (code&0x1000) row=(height<<3)-1-row; // Flip Y\r
+\r
+ tile=code&0x7ff; // Tile number\r
+ tile+=row>>3; // Tile number increases going down\r
+ delta=height; // Delta to increase tile by going right\r
+ if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X\r
+\r
+ tile<<=4; tile+=(row&7)<<1; // Tile address\r
+\r
+ if(code&0x8000) { // high priority - cache it\r
+ *(*hc)++ = (tile<<16)|((code&0x0800)<<5)|((sx<<6)&0x0000ffc0)|((code>>9)&0x30)|((sprite[0]>>16)&0xf);\r
+ } else {\r
+ delta<<=4; // Delta of address\r
+ pal=((code>>9)&0x30)|(sh<<6);\r
+\r
+ if(sh && (code&0x6000) == 0x6000) {\r
+ if(code&0x0800) fTileFunc=TileFlipSH;\r
+ else fTileFunc=TileNormSH;\r
+ } else {\r
+ if(code&0x0800) fTileFunc=TileFlip;\r
+ else fTileFunc=TileNorm;\r
+ }\r
+\r
+ for (; width; width--,sx+=8,tile+=delta)\r
+ {\r
+ if(sx<=0) continue;\r
+ if(sx>=328) break; // Offscreen\r
+\r
+ tile&=0x7fff; // Clip tile address\r
+ fTileFunc(sx,tile,pal);\r
+ }\r
+ }\r
+}\r
+#endif\r
+\r
+\r
+// Index + 0 : hhhhvvvv s---hhvv yyyyyyyy yyyyyyyy // s: skip flag, h: horiz. size\r
+// Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8\r
+\r
+static void DrawSpriteZ(int pack, int pack2, int shpri, int sprio)\r
+{\r
+ int width=0,height=0;\r
+ int row=0;\r
+ int pal;\r
+ int tile=0,delta=0;\r
+ int sx, sy;\r
+ int (*fTileFunc)(int sx,int addr,int pal,int zval);\r
+\r
+ // parse the sprite data\r
+ sx=pack2>>16; // X\r
+ sy=(pack <<16)>>16; // Y\r
+ width=pack>>28;\r
+ height=(pack>>24)&7; // Width and height in tiles\r
+\r
+ row=Scanline-sy; // Row of the sprite we are on\r
+\r
+ if (pack2&0x1000) row=(height<<3)-1-row; // Flip Y\r
+\r
+ tile=pack2&0x7ff; // Tile number\r
+ tile+=row>>3; // Tile number increases going down\r
+ delta=height; // Delta to increase tile by going right\r
+ if (pack2&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X\r
+\r
+ tile<<=4; tile+=(row&7)<<1; // Tile address\r
+ delta<<=4; // Delta of address\r
+ pal=((pack2>>9)&0x30);\r
+ if((shpri&1)&&!(shpri&2)) pal|=0x40;\r
+\r
+ shpri&=1;\r
+ if((pack2&0x6000) != 0x6000) shpri = 0;\r
+ shpri |= (pack2&0x0800)>>10;\r
+ switch(shpri) {\r
+ default:\r
+ case 0: fTileFunc=TileNormZ; break;\r
+ case 1: fTileFunc=TileNormZSH; break;\r
+ case 2: fTileFunc=TileFlipZ; break;\r
+ case 3: fTileFunc=TileFlipZSH; break;\r
+ }\r
+\r
+ for (; width; width--,sx+=8,tile+=delta)\r
+ {\r
+ if(sx<=0) continue;\r
+ if(sx>=328) break; // Offscreen\r
+\r
+ tile&=0x7fff; // Clip tile address\r
+ fTileFunc(sx,tile,pal,sprio);\r
+ }\r
+}\r
+\r
+static void DrawSpriteInterlace(unsigned int *sprite)\r
+{\r
+ int width=0,height=0;\r
+ int row=0,code=0;\r
+ int pal;\r
+ int tile=0,delta=0;\r
+ int sx, sy;\r
+\r
+ // parse the sprite data\r
+ sy=sprite[0];\r
+ height=sy>>24;\r
+ sy=(sy&0x3ff)-0x100; // Y\r
+ width=(height>>2)&3; height&=3;\r
+ width++; height++; // Width and height in tiles\r
+\r
+ row=(Scanline<<1)-sy; // Row of the sprite we are on\r
+\r
+ code=sprite[1];\r
+ sx=((code>>16)&0x1ff)-0x78; // X\r
+\r
+ if (code&0x1000) row^=(16<<height)-1; // Flip Y\r
+\r
+ tile=code&0x3ff; // Tile number\r
+ tile+=row>>4; // Tile number increases going down\r
+ delta=height; // Delta to increase tile by going right\r
+ if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X\r
+\r
+ tile<<=5; tile+=(row&15)<<1; // Tile address\r
+\r
+ delta<<=5; // Delta of address\r
+ pal=((code>>9)&0x30); // Get palette pointer\r
+\r
+ for (; width; width--,sx+=8,tile+=delta)\r
+ {\r
+ if(sx<=0) continue;\r
+ if(sx>=328) break; // Offscreen\r
+\r
+ tile&=0x7fff; // Clip tile address\r
+ if (code&0x0800) TileFlip(sx,tile,pal);\r
+ else TileNorm(sx,tile,pal);\r
+ }\r
+}\r
+\r
+\r
+static void DrawAllSpritesInterlace(int pri, int maxwidth)\r
+{\r
+ struct PicoVideo *pvid=&Pico.video;\r
+ int i,u,table,link=0,sline=Scanline<<1;\r
+ unsigned int *sprites[80]; // Sprite index\r
+\r
+ table=pvid->reg[5]&0x7f;\r
+ if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r
+ table<<=8; // Get sprite table address/2\r
+\r
+ for (i=u=0; u < 80 && i < 21; u++)\r
+ {\r
+ unsigned int *sprite;\r
+ int code, sx, sy, height;\r
+\r
+ sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r
+\r
+ // get sprite info\r
+ code = sprite[0];\r
+ sx = sprite[1];\r
+ if(((sx>>15)&1) != pri) goto nextsprite; // wrong priority sprite\r
+\r
+ // check if it is on this line\r
+ sy = (code&0x3ff)-0x100;\r
+ height = (((code>>24)&3)+1)<<4;\r
+ if(sline < sy || sline >= sy+height) goto nextsprite; // no\r
+\r
+ // check if sprite is not hidden offscreen\r
+ sx = (sx>>16)&0x1ff;\r
+ sx -= 0x78; // Get X coordinate + 8\r
+ if(sx <= -8*3 || sx >= maxwidth) goto nextsprite;\r
+\r
+ // sprite is good, save it's pointer\r
+ sprites[i++]=sprite;\r
+\r
+ nextsprite:\r
+ // Find next sprite\r
+ link=(code>>16)&0x7f;\r
+ if(!link) break; // End of sprites\r
+ }\r
+\r
+ // Go through sprites backwards:\r
+ for (i-- ;i>=0; i--)\r
+ DrawSpriteInterlace(sprites[i]);\r
+}\r
+\r
+\r
+#ifndef _ASM_DRAW_C\r
+static void DrawSpritesFromCache(int *hc, int sh)\r
+{\r
+ int code, tile, sx, delta, width;\r
+ int pal;\r
+ int (*fTileFunc)(int sx,int addr,int pal);\r
+\r
+ // *(*hc)++ = (tile<<16)|((code&0x0800)<<5)|((sx<<6)&0x0000ffc0)|((code>>9)&0x30)|((sprite[0]>>24)&0xf);\r
+\r
+ while((code=*hc++)) {\r
+ pal=(code&0x30);\r
+ delta=code&0xf;\r
+ width=delta>>2; delta&=3;\r
+ width++; delta++; // Width and height in tiles\r
+ if (code&0x10000) delta=-delta; // Flip X\r
+ delta<<=4;\r
+ tile=((unsigned int)code>>17)<<1;\r
+ sx=(code<<16)>>22; // sx can be negative (start offscreen), so sign extend\r
+\r
+ if(sh && pal == 0x30) { //\r
+ if(code&0x10000) fTileFunc=TileFlipSH;\r
+ else fTileFunc=TileNormSH;\r
+ } else {\r
+ if(code&0x10000) fTileFunc=TileFlip;\r
+ else fTileFunc=TileNorm;\r
+ }\r
+\r
+ for (; width; width--,sx+=8,tile+=delta)\r
+ {\r
+ if(sx<=0) continue;\r
+ if(sx>=328) break; // Offscreen\r
+\r
+ tile&=0x7fff; // Clip tile address\r
+ fTileFunc(sx,tile,pal);\r
+ }\r
+ }\r
+}\r
+#endif\r
+\r
+\r
+// Index + 0 : ----hhvv -lllllll -------y yyyyyyyy\r
+// Index + 4 : -------x xxxxxxxx pccvhnnn nnnnnnnn\r
+// v\r
+// Index + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size\r
+// Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8\r
+\r
+static void PrepareSprites(int full)\r
+{\r
+ struct PicoVideo *pvid=&Pico.video;\r
+ int u=0,link=0,sblocks=0;\r
+ int table=0;\r
+ int *pd = HighPreSpr;\r
+\r
+ table=pvid->reg[5]&0x7f;\r
+ if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode\r
+ table<<=8; // Get sprite table address/2\r
+\r
+ if (!full)\r
+ {\r
+ int pack;\r
+ // updates: tilecode, sx\r
+ for (u=0; u < 80 && (pack = *pd); u++, pd+=2)\r
+ {\r
+ unsigned int *sprite;\r
+ int code, code2, sx, sy, skip=0;\r
+\r
+ sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r
+\r
+ // parse sprite info\r
+ code = sprite[0];\r
+ code2 = sprite[1];\r
+ code2 &= ~0xfe000000;\r
+ code2 -= 0x00780000; // Get X coordinate + 8 in upper 16 bits\r
+ sx = code2>>16;\r
+\r
+ if((sx <= 8-((pack>>28)<<3) && sx >= -0x76) || sx >= 328) skip=1<<23;\r
+ else if ((sy = (pack<<16)>>16) < 240 && sy > -32) {\r
+ int sbl = (2<<(pack>>28))-1;\r
+ sblocks |= sbl<<(sy>>3);\r
+ }\r
+\r
+ *pd = (pack&~(1<<23))|skip;\r
+ *(pd+1) = code2;\r
+\r
+ // Find next sprite\r
+ link=(code>>16)&0x7f;\r
+ if(!link) break; // End of sprites\r
+ }\r
+ SpriteBlocks |= sblocks;\r
+ }\r
+ else\r
+ {\r
+ for (; u < 80; u++)\r
+ {\r
+ unsigned int *sprite;\r
+ int code, code2, sx, sy, hv, height, width, skip=0, sx_min;\r
+\r
+ sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite\r
+\r
+ // parse sprite info\r
+ code = sprite[0];\r
+ sy = (code&0x1ff)-0x80;\r
+ hv = (code>>24)&0xf;\r
+ height = (hv&3)+1;\r
+\r
+ if(sy > 240 || sy + (height<<3) <= 0) skip|=1<<22;\r
+ \r
+ width = (hv>>2)+1;\r
+ code2 = sprite[1];\r
+ sx = (code2>>16)&0x1ff;\r
+ sx -= 0x78; // Get X coordinate + 8\r
+ sx_min = 8-(width<<3);\r
+ \r
+ if((sx <= sx_min && sx >= -0x76) || sx >= 328) skip|=1<<23;\r
+ else if (sx > sx_min && !skip) {\r
+ int sbl = (2<<height)-1;\r
+ int shi = sy>>3;\r
+ if(shi < 0) shi=0; // negative sy\r
+ sblocks |= sbl<<shi;\r
+ }\r
+ \r
+ *pd++ = (width<<28)|(height<<24)|skip|(hv<<16)|((unsigned short)sy);\r
+ *pd++ = (sx<<16)|((unsigned short)code2);\r
+ \r
+ // Find next sprite\r
+ link=(code>>16)&0x7f;\r
+ if(!link) break; // End of sprites\r
+ }\r
+ SpriteBlocks = sblocks;\r
+ *pd = 0; // terminate\r
+ }\r
+}\r
+\r
+static void DrawAllSprites(int *hcache, int maxwidth, int prio, int sh)\r
+{\r
+ int i,u,n;\r
+ int sx1seen=0; // sprite with x coord 1 or 0 seen\r
+ int ntiles = 0; // tile counter for sprite limit emulation\r
+ int *sprites[40]; // Sprites to draw in fast mode\r
+ int *ps, pack, rs = rendstatus, scan=Scanline;\r
+\r
+ if(rs&8) {\r
+ DrawAllSpritesInterlace(prio, maxwidth);\r
+ return;\r
+ }\r
+ if(rs&0x11) {\r
+ //dprintf("PrepareSprites(%i) [%i]", (rs>>4)&1, scan);\r
+ PrepareSprites(rs&0x10);\r
+ rendstatus=rs&~0x11;\r
+ }\r
+ if (!(SpriteBlocks & (1<<(scan>>3)))) return;\r
+\r
+ if(((rs&4)||sh)&&prio==0)\r
+ memset(HighSprZ, 0, 328);\r
+ if(!(rs&4)&&prio) {\r
+ if(hcache[0]) DrawSpritesFromCache(hcache, sh);\r
+ return;\r
+ }\r
+\r
+ ps = HighPreSpr;\r
+\r
+ // Index + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size\r
+ // Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8\r
+\r
+ for(i=u=n=0; (pack = *ps) && n < 20; ps+=2, u++)\r
+ {\r
+ int sx, sy, row, pack2;\r
+\r
+ if(pack & 0x00400000) continue;\r
+\r
+ // get sprite info\r
+ pack2 = *(ps+1);\r
+ sx = pack2>>16;\r
+ sy = (pack <<16)>>16;\r
+ row = scan-sy;\r
+\r
+ //dprintf("x: %i y: %i %ix%i", sx, sy, (pack>>28)<<3, (pack>>21)&0x38);\r
+\r
+ if(sx == -0x77) sx1seen|=1; // for masking mode 2\r
+\r
+ // check if it is on this line\r
+ if(row < 0 || row >= ((pack>>21)&0x38)) continue; // no\r
+ n++; // number of sprites on this line (both visible and hidden, max is 20) [broken]\r
+\r
+ // sprite limit\r
+ ntiles += pack>>28;\r
+ if(ntiles > 40) break;\r
+\r
+ if(pack & 0x00800000) continue;\r
+\r
+ // masking sprite?\r
+ if(sx == -0x78) {\r
+ if(!(sx1seen&1) || sx1seen==3) {\r
+ break; // this sprite is not drawn and remaining sprites are masked\r
+ }\r
+ if((sx1seen>>8) == 0) sx1seen=(i+1)<<8;\r
+ continue;\r
+ }\r
+ else if(sx == -0x77) {\r
+ // masking mode2 (Outrun, Galaxy Force II, Shadow of the beast)\r
+ if(sx1seen>>8) { i=(sx1seen>>8)-1; break; } // seen both 0 and 1\r
+ sx1seen |= 2;\r
+ continue;\r
+ }\r
+\r
+ // accurate sprites\r
+ //dprintf("P:%i",((sx>>15)&1));\r
+ if(rs&4) {\r
+ // might need to skip this sprite\r
+ if((pack2&0x8000) ^ (prio<<15)) continue;\r
+ DrawSpriteZ(pack,pack2,sh|(prio<<1),(char)(0x1f-n));\r
+ continue;\r
+ }\r
+\r
+ // sprite is good, save it's pointer\r
+ sprites[i++]=ps;\r
+ }\r
+\r
+ // Go through sprites backwards:\r
+ if(!(rs&4)) {\r
+ for (i--; i>=0; i--)\r
+ DrawSprite(sprites[i],&hcache,sh);\r
+\r
+ // terminate cache list\r
+ *hcache = 0;\r
+ }\r
+}\r
+\r
+\r
+// --------------------------------------------\r
+\r
+#ifndef _ASM_DRAW_C\r
+static void BackFill(int reg7, int sh)\r
+{\r
+ unsigned int back=0;\r
+ unsigned int *pd=NULL,*end=NULL;\r
+\r
+ // Start with a blank scanline (background colour):\r
+ back=reg7&0x3f;\r
+ back|=sh<<6;\r
+ back|=back<<8;\r
+ back|=back<<16;\r
+\r
+ pd= (unsigned int *)(DrawLineInt+8);\r
+ end=(unsigned int *)(DrawLineInt+8+320);\r
+\r
+ do { pd[0]=pd[1]=pd[2]=pd[3]=back; pd+=4; } while (pd<end);\r
+}\r
+#endif\r
+\r
+// --------------------------------------------\r
+\r
+unsigned short HighPal[0x100];\r
+\r
+#ifndef _ASM_DRAW_C\r
+static void FinalizeLineBGR444(int sh)\r
+{\r
+ unsigned short *pd=DrawLineDest;\r
+ unsigned char *ps=DrawLineInt+8;\r
+ unsigned short *pal=Pico.cram;\r
+ int len, i, t;\r
+\r
+ if (Pico.video.reg[12]&1) {\r
+ len = 320;\r
+ } else {\r
+ if(!(PicoOpt&0x100)) pd+=32;\r
+ len = 256;\r
+ }\r
+\r
+ if(sh) {\r
+ pal=HighPal;\r
+ if(Pico.m.dirtyPal) {\r
+ blockcpy(pal, Pico.cram, 0x40*2);\r
+ // shadowed pixels\r
+ for(i = 0x3f; i >= 0; i--)\r
+ pal[0x40|i] = pal[0xc0|i] = (unsigned short)((pal[i]>>1)&0x0777);\r
+ // hilighted pixels\r
+ for(i = 0x3f; i >= 0; i--) {\r
+ t=pal[i]&0xeee;t+=0x444;if(t&0x10)t|=0xe;if(t&0x100)t|=0xe0;if(t&0x1000)t|=0xe00;t&=0xeee;\r
+ pal[0x80|i]=(unsigned short)t;\r
+ }\r
+ Pico.m.dirtyPal = 0;\r
+ }\r
+ }\r
+\r
+ for(i = 0; i < len; i++)\r
+ pd[i] = pal[ps[i]];\r
+}\r
+\r
+\r
+static void FinalizeLineRGB555(int sh)\r
+{\r
+ unsigned short *pd=DrawLineDest;\r
+ unsigned char *ps=DrawLineInt+8;\r
+ unsigned short *pal=HighPal;\r
+ int len, i, t, dirtyPal = Pico.m.dirtyPal;\r
+\r
+ if(dirtyPal) {\r
+ unsigned short *ppal=Pico.cram;\r
+ for(i = 0x3f; i >= 0; i--)\r
+ pal[i] = (unsigned short) (((ppal[i]&0x00f)<<12)|((ppal[i]&0x0f0)<<3)|((ppal[i]&0xf00)>>7));\r
+ Pico.m.dirtyPal = 0;\r
+ }\r
+\r
+ if (Pico.video.reg[12]&1) {\r
+ len = 320;\r
+ } else {\r
+ if(!(PicoOpt&0x100)) pd+=32;\r
+ len = 256;\r
+ }\r
+\r
+ if(sh) {\r
+ if(dirtyPal) {\r
+ // shadowed pixels\r
+ for(i = 0x3f; i >= 0; i--)\r
+ pal[0x40|i] = pal[0xc0|i] = (unsigned short)((pal[i]>>1)&0x738e);\r
+ // hilighted pixels\r
+ for(i = 0x3f; i >= 0; i--) {\r
+ t=pal[i]&0xe71c;t+=0x4208;if(t&0x20)t|=0x1c;if(t&0x800)t|=0x700;if(t&0x10000)t|=0xe000;t&=0xe71c;\r
+ pal[0x80|i]=(unsigned short)t;\r
+ }\r
+ }\r
+ }\r
+\r
+ for(i = 0; i < len; i++)\r
+ pd[i] = pal[ps[i]];\r
+}\r
+#endif\r
+\r
+static void FinalizeLine8bit(int sh)\r
+{\r
+ unsigned char *pd=DrawLineDest;\r
+ int len, rs = rendstatus;\r
+ static int dirty_count;\r
+\r
+ if (!sh && Pico.m.dirtyPal && Scanline < 222) {\r
+ // a hack for mid-frame palette changes\r
+ if (!(rs & 0x20))\r
+ dirty_count = 1;\r
+ else dirty_count++;\r
+ rs |= 0x20;\r
+ rendstatus = rs;\r
+ if (dirty_count == 3) {\r
+ blockcpy(HighPal, Pico.cram, 0x40*2);\r
+ } else if (dirty_count == 11) {\r
+ blockcpy(HighPal+0x40, Pico.cram, 0x40*2);\r
+ }\r
+ }\r
+\r
+ if (Pico.video.reg[12]&1) {\r
+ len = 320;\r
+ } else {\r
+ if(!(PicoOpt&0x100)) pd+=32;\r
+ len = 256;\r
+ }\r
+\r
+/* test\r
+ if (!sh && rs & 0x20) {\r
+ if (dirty_count >= 11) {\r
+ blockcpy_or(pd, HighCol+8, len, 0x80);\r
+ } else {\r
+ blockcpy_or(pd, HighCol+8, len, 0x40);\r
+ }\r
+ } else {\r
+ blockcpy(pd, HighCol+8, len);\r
+ }\r
+*/\r
+}\r
+\r
+void (*FinalizeLine)(int sh) = FinalizeLineBGR444;\r
+\r
+// --------------------------------------------\r
+\r
+static int DrawDisplay(int sh)\r
+{\r
+ struct PicoVideo *pvid=&Pico.video;\r
+ int win=0,edge=0,hvwind=0;\r
+ int maxw, maxcells;\r
+\r
+ if(pvid->reg[12]&1) {\r
+ maxw = 328; maxcells = 40;\r
+ } else {\r
+ maxw = 264; maxcells = 32;\r
+ }\r
+\r
+ // Find out if the window is on this line:\r
+ win=pvid->reg[0x12];\r
+ edge=(win&0x1f)<<3;\r
+\r
+ if (win&0x80) { if (Scanline>=edge) hvwind=1; }\r
+ else { if (Scanline< edge) hvwind=1; }\r
+\r
+ if(!hvwind) { // we might have a vertical window here \r
+ win=pvid->reg[0x11];\r
+ edge=win&0x1f;\r
+ if(win&0x80) {\r
+ if(!edge) hvwind=1;\r
+ else if(edge < (maxcells>>1)) hvwind=2;\r
+ } else {\r
+ if(!edge);\r
+ else if(edge < (maxcells>>1)) hvwind=2;\r
+ else hvwind=1;\r
+ }\r
+ }\r
+\r
+ DrawLayer(1, HighCacheB, maxcells, sh);\r
+ if(hvwind == 1)\r
+ DrawWindow(0, maxcells>>1, 0, sh); // HighCacheAW\r
+ else if(hvwind == 2) {\r
+ // ahh, we have vertical window\r
+ DrawLayer(0, HighCacheA, (win&0x80) ? edge<<1 : maxcells, sh);\r
+ DrawWindow((win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 0, sh); // HighCacheW\r
+ } else\r
+ DrawLayer(0, HighCacheA, maxcells, sh);\r
+ DrawAllSprites(HighCacheS, maxw, 0, sh);\r
+\r
+ if(HighCacheB[0]) DrawTilesFromCache(HighCacheB, sh);\r
+ if(hvwind == 1)\r
+ DrawWindow(0, maxcells>>1, 1, sh);\r
+ else if(hvwind == 2) {\r
+ if(HighCacheA[0]) DrawTilesFromCache(HighCacheA, sh);\r
+ DrawWindow((win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 1, sh);\r
+ } else\r
+ if(HighCacheA[0]) DrawTilesFromCache(HighCacheA, sh);\r
+ DrawAllSprites(HighCacheS, maxw, 1, sh);\r
+\r
+ return 0;\r
+}\r
+\r
+\r
+void PicoFrameStart()\r
+{\r
+ // prepare to do this frame\r
+ rendstatus &= 0x40;\r
+ rendstatus |= (PicoOpt&0x80)>>5; // accurate sprites\r
+ if(rendstatus)\r
+ Pico.video.status &= ~0x0020;\r
+ else Pico.video.status |= 0x0020; // sprite collision\r
+ if((Pico.video.reg[12]&6) == 6) rendstatus |= 8; // interlace mode\r
+\r
+ PrepareSprites(1);\r
+}\r
+\r
+static int Skip=0;\r
+\r
+int PicoLine(int scan)\r
+{\r
+ int sh;\r
+ if (Skip>0) { Skip--; return 0; } // Skip rendering lines\r
+\r
+ if(!(rendstatus&0x40))\r
+ DrawLineInt = DrawLineDest;\r
+\r
+ Scanline=scan;\r
+ sh=(Pico.video.reg[0xC]&8)>>3; // shadow/hilight?\r
+\r
+ // Draw screen:\r
+ BackFill(Pico.video.reg[7], sh);\r
+ if (Pico.video.reg[1]&0x40)\r
+ DrawDisplay(sh);\r
+\r
+ FinalizeLine(sh);\r
+ //if (SpriteBlocks & (1<<(scan>>3))) for (sh=0; sh < 30; sh++) DrawLineDest[sh] = 0xf;\r
+\r
+ Skip=PicoScan(Scanline,DrawLineDest);\r
+\r
+ return 0;\r
+}\r
+\r
+\r
+void DrawSetColorFormat(int which)\r
+{\r
+ rendstatus |= 0x40;\r
+ DrawLineInt = HighCol;\r
+\r
+ if (which == 2) {\r
+ rendstatus &= ~0x40;\r
+ FinalizeLine = FinalizeLine8bit;\r
+ } else if (which == 1)\r
+ FinalizeLine = FinalizeLineRGB555;\r
+ else\r
+ FinalizeLine = FinalizeLineBGR444;\r
+}\r