mirror of
https://github.com/RaySollium99/picodrive.git
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ea8c405fa7
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@257 be3aeb3a-fb24-0410-a615-afba39da0efa
1379 lines
40 KiB
C
1379 lines
40 KiB
C
// This is part of Pico Library
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// (c) Copyright 2004 Dave, All rights reserved.
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// (c) Copyright 2006 notaz, All rights reserved.
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// Free for non-commercial use.
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// For commercial use, separate licencing terms must be obtained.
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#include "PicoInt.h"
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int (*PicoScan)(unsigned int num, void *data)=NULL;
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#if OVERRIDE_HIGHCOL
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static unsigned char DefHighCol[8+320+8];
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unsigned char *HighCol=DefHighCol;
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#else
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unsigned char HighCol[8+320+8];
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#endif
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unsigned short DefOutBuff[320*2];
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void *DrawLineDest=DefOutBuff; // pointer to dest buffer where to draw this line to
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static int HighCacheA[41+1]; // caches for high layers
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static int HighCacheB[41+1];
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static int HighCacheS[80+1]; // and sprites
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static int HighPreSpr[80*2+1]; // slightly preprocessed sprites
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char HighSprZ[320+8+8]; // Z-buffer for accurate sprites and shadow/hilight mode
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// (if bit 7 == 0, sh caused by tile; if bit 6 == 0 pixel must be shadowed, else hilighted, if bit5 == 1)
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// lsb->msb: moved sprites, not all window tiles use same priority, accurate sprites (copied from PicoOpt), interlace
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// dirty sprites, sonic mode, have layer with all hi prio tiles (mk3), layer sh/hi already processed
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int rendstatus;
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int Scanline=0; // Scanline
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static int SpriteBlocks;
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//unsigned short ppt[] = { 0x0f11, 0x0ff1, 0x01f1, 0x011f, 0x01ff, 0x0f1f, 0x0f0e, 0x0e7c };
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struct TileStrip
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{
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int nametab; // Position in VRAM of name table (for this tile line)
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int line; // Line number in pixels 0x000-0x3ff within the virtual tilemap
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int hscroll; // Horizontal scroll value in pixels for the line
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int xmask; // X-Mask (0x1f - 0x7f) for horizontal wraparound in the tilemap
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int *hc; // cache for high tile codes and their positions
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int cells; // cells (tiles) to draw (32 col mode doesn't need to update whole 320)
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};
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// stuff available in asm:
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#ifdef _ASM_DRAW_C
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void DrawWindow(int tstart, int tend, int prio, int sh);
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void BackFill(int reg7, int sh);
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void DrawSprite(int *sprite, int **hc, int sh);
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void DrawTilesFromCache(int *hc, int sh, int rlim);
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void DrawSpritesFromCache(int *hc, int sh);
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void DrawLayer(int plane_sh, int *hcache, int cellskip, int maxcells);
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void FinalizeLineBGR444(int sh);
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void FinalizeLineRGB555(int sh);
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void blockcpy_or(void *dst, void *src, size_t n, int pat);
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#else
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// utility
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void blockcpy_or(void *dst, void *src, size_t n, int pat)
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{
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unsigned char *pd = dst, *ps = src;
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for (; n; n--)
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*pd++ = (unsigned char) (*ps++ | pat);
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}
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#endif
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static int TileNorm(int sx,int addr,int pal)
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{
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unsigned char *pd = HighCol+sx;
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unsigned int pack=0; unsigned int t=0;
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pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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if (pack)
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{
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t=pack&0x0000f000; if (t) pd[0]=(unsigned char)(pal|(t>>12));
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t=pack&0x00000f00; if (t) pd[1]=(unsigned char)(pal|(t>> 8));
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t=pack&0x000000f0; if (t) pd[2]=(unsigned char)(pal|(t>> 4));
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t=pack&0x0000000f; if (t) pd[3]=(unsigned char)(pal|(t ));
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t=pack&0xf0000000; if (t) pd[4]=(unsigned char)(pal|(t>>28));
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t=pack&0x0f000000; if (t) pd[5]=(unsigned char)(pal|(t>>24));
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t=pack&0x00f00000; if (t) pd[6]=(unsigned char)(pal|(t>>20));
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t=pack&0x000f0000; if (t) pd[7]=(unsigned char)(pal|(t>>16));
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return 0;
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}
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return 1; // Tile blank
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}
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static int TileFlip(int sx,int addr,int pal)
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{
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unsigned char *pd = HighCol+sx;
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unsigned int pack=0; unsigned int t=0;
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pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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if (pack)
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{
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t=pack&0x000f0000; if (t) pd[0]=(unsigned char)(pal|(t>>16));
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t=pack&0x00f00000; if (t) pd[1]=(unsigned char)(pal|(t>>20));
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t=pack&0x0f000000; if (t) pd[2]=(unsigned char)(pal|(t>>24));
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t=pack&0xf0000000; if (t) pd[3]=(unsigned char)(pal|(t>>28));
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t=pack&0x0000000f; if (t) pd[4]=(unsigned char)(pal|(t ));
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t=pack&0x000000f0; if (t) pd[5]=(unsigned char)(pal|(t>> 4));
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t=pack&0x00000f00; if (t) pd[6]=(unsigned char)(pal|(t>> 8));
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t=pack&0x0000f000; if (t) pd[7]=(unsigned char)(pal|(t>>12));
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return 0;
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}
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return 1; // Tile blank
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}
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// tile renderers for hacky operator sprite support
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#define sh_pix(x) \
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if(!t); \
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else if(t==0xe) pd[x]=(unsigned char)((pd[x]&0x3f)|0x80); /* hilight */ \
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else if(t==0xf) pd[x]=(unsigned char)((pd[x]&0x3f)|0xc0); /* shadow */ \
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else pd[x]=(unsigned char)(pal|t)
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#ifndef _ASM_DRAW_C
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static int TileNormSH(int sx,int addr,int pal)
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{
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unsigned int pack=0; unsigned int t=0;
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unsigned char *pd = HighCol+sx;
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pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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if (pack)
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{
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t=(pack&0x0000f000)>>12; sh_pix(0);
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t=(pack&0x00000f00)>> 8; sh_pix(1);
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t=(pack&0x000000f0)>> 4; sh_pix(2);
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t=(pack&0x0000000f) ; sh_pix(3);
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t=(pack&0xf0000000)>>28; sh_pix(4);
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t=(pack&0x0f000000)>>24; sh_pix(5);
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t=(pack&0x00f00000)>>20; sh_pix(6);
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t=(pack&0x000f0000)>>16; sh_pix(7);
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return 0;
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}
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return 1; // Tile blank
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}
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static int TileFlipSH(int sx,int addr,int pal)
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{
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unsigned int pack=0; unsigned int t=0;
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unsigned char *pd = HighCol+sx;
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pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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if (pack)
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{
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t=(pack&0x000f0000)>>16; sh_pix(0);
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t=(pack&0x00f00000)>>20; sh_pix(1);
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t=(pack&0x0f000000)>>24; sh_pix(2);
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t=(pack&0xf0000000)>>28; sh_pix(3);
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t=(pack&0x0000000f) ; sh_pix(4);
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t=(pack&0x000000f0)>> 4; sh_pix(5);
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t=(pack&0x00000f00)>> 8; sh_pix(6);
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t=(pack&0x0000f000)>>12; sh_pix(7);
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return 0;
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}
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return 1; // Tile blank
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}
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#endif
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static int TileNormZ(int sx,int addr,int pal,int zval)
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{
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unsigned int pack=0; unsigned int t=0;
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unsigned char *pd = HighCol+sx;
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char *zb = HighSprZ+sx;
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int collision = 0, zb_s;
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pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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if (pack)
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{
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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; } }
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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; } }
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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; } }
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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; } }
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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; } }
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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; } }
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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; } }
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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; } }
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if(collision) Pico.video.status|=0x20;
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return 0;
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}
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return 1; // Tile blank
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}
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static int TileFlipZ(int sx,int addr,int pal,int zval)
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{
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unsigned int pack=0; unsigned int t=0;
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unsigned char *pd = HighCol+sx;
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char *zb = HighSprZ+sx;
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int collision = 0, zb_s;
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pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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if (pack)
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{
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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; } }
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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; } }
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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; } }
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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; } }
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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; } }
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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; } }
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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; } }
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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; } }
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if(collision) Pico.video.status|=0x20;
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return 0;
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}
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return 1; // Tile blank
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}
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#define sh_pixZ(x) \
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if(t) { \
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if(zb[x]) collision=1; \
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if(zval>zb[x]) { \
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if (t==0xe) { pd[x]=(unsigned char)((pd[x]&0x3f)|0x80); /* hilight */ } \
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else if(t==0xf) { pd[x]=(unsigned char)((pd[x]&0x3f)|0xc0); /* shadow */ } \
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else { zb[x]=(char)zval; pd[x]=(unsigned char)(pal|t); } \
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} \
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}
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static int TileNormZSH(int sx,int addr,int pal,int zval)
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{
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unsigned int pack=0; unsigned int t=0;
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unsigned char *pd = HighCol+sx;
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char *zb = HighSprZ+sx;
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int collision = 0;
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pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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if (pack)
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{
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t=(pack&0x0000f000)>>12; sh_pixZ(0);
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t=(pack&0x00000f00)>> 8; sh_pixZ(1);
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t=(pack&0x000000f0)>> 4; sh_pixZ(2);
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t=(pack&0x0000000f) ; sh_pixZ(3);
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t=(pack&0xf0000000)>>28; sh_pixZ(4);
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t=(pack&0x0f000000)>>24; sh_pixZ(5);
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t=(pack&0x00f00000)>>20; sh_pixZ(6);
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t=(pack&0x000f0000)>>16; sh_pixZ(7);
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if(collision) Pico.video.status|=0x20;
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return 0;
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}
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return 1; // Tile blank
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}
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static int TileFlipZSH(int sx,int addr,int pal,int zval)
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{
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unsigned int pack=0; unsigned int t=0;
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unsigned char *pd = HighCol+sx;
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char *zb = HighSprZ+sx;
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int collision = 0;
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pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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if (pack)
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{
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t=(pack&0x000f0000)>>16; sh_pixZ(0);
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t=(pack&0x00f00000)>>20; sh_pixZ(1);
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t=(pack&0x0f000000)>>24; sh_pixZ(2);
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t=(pack&0xf0000000)>>28; sh_pixZ(3);
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t=(pack&0x0000000f) ; sh_pixZ(4);
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t=(pack&0x000000f0)>> 4; sh_pixZ(5);
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t=(pack&0x00000f00)>> 8; sh_pixZ(6);
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t=(pack&0x0000f000)>>12; sh_pixZ(7);
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if(collision) Pico.video.status|=0x20;
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return 0;
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}
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return 1; // Tile blank
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}
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// --------------------------------------------
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#ifndef _ASM_DRAW_C
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static void DrawStrip(struct TileStrip *ts, int plane_sh, int cellskip)
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{
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int tilex,dx,ty,code=0,addr=0,cells;
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int oldcode=-1,blank=-1; // The tile we know is blank
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int pal=0,sh;
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// Draw tiles across screen:
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sh=(plane_sh<<5)&0x40;
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tilex=((-ts->hscroll)>>3)+cellskip;
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ty=(ts->line&7)<<1; // Y-Offset into tile
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dx=((ts->hscroll-1)&7)+1;
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cells = ts->cells - cellskip;
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if(dx != 8) cells++; // have hscroll, need to draw 1 cell more
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dx+=cellskip<<3;
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for (; cells > 0; dx+=8,tilex++,cells--)
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{
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int zero=0;
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code=Pico.vram[ts->nametab+(tilex&ts->xmask)];
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if (code==blank) continue;
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if (code>>15) { // high priority tile
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int cval = code | (dx<<16) | (ty<<25);
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if(code&0x1000) cval^=7<<26;
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*ts->hc++ = cval; // cache it
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continue;
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}
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if (code!=oldcode) {
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oldcode = code;
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// Get tile address/2:
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addr=(code&0x7ff)<<4;
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addr+=ty;
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if (code&0x1000) addr^=0xe; // Y-flip
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pal=((code>>9)&0x30)|sh;
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}
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if (code&0x0800) zero=TileFlip(dx,addr,pal);
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else zero=TileNorm(dx,addr,pal);
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if (zero) blank=code; // We know this tile is blank now
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}
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// terminate the cache list
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*ts->hc = 0;
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// if oldcode wasn't changed, it means all layer is hi priority
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if (oldcode == -1) rendstatus|=0x40;
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}
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// this is messy
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void DrawStripVSRam(struct TileStrip *ts, int plane_sh, int cellskip)
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{
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int tilex,dx,code=0,addr=0,cell=0;
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int oldcode=-1,blank=-1; // The tile we know is blank
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int pal=0,scan=Scanline;
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// Draw tiles across screen:
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tilex=(-ts->hscroll)>>3;
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dx=((ts->hscroll-1)&7)+1;
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if(dx != 8) cell--; // have hscroll, start with negative cell
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cell+=cellskip;
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tilex+=cellskip;
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dx+=cellskip<<3;
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for (; cell < ts->cells; dx+=8,tilex++,cell++)
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{
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int zero=0,nametabadd,ty;
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//if((cell&1)==0)
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{
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int line,vscroll;
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vscroll=Pico.vsram[(plane_sh&1)+(cell&~1)];
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// Find the line in the name table
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line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..
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nametabadd=(line>>3)<<(ts->line>>24); // .. and shift[width]
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ty=(line&7)<<1; // Y-Offset into tile
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}
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code=Pico.vram[ts->nametab+nametabadd+(tilex&ts->xmask)];
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if (code==blank) continue;
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if (code>>15) { // high priority tile
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int cval = code | (dx<<16) | (ty<<25);
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if(code&0x1000) cval^=7<<26;
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*ts->hc++ = cval; // cache it
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continue;
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}
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if (code!=oldcode) {
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oldcode = code;
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// Get tile address/2:
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addr=(code&0x7ff)<<4;
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if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
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pal=((code>>9)&0x30)|((plane_sh<<5)&0x40);
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}
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if (code&0x0800) zero=TileFlip(dx,addr,pal);
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else zero=TileNorm(dx,addr,pal);
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if (zero) blank=code; // We know this tile is blank now
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}
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// terminate the cache list
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*ts->hc = 0;
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if (oldcode == -1) rendstatus|=0x40;
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}
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#endif
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#ifndef _ASM_DRAW_C
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static
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#endif
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void DrawStripInterlace(struct TileStrip *ts)
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{
|
|
int tilex=0,dx=0,ty=0,code=0,addr=0,cells;
|
|
int oldcode=-1,blank=-1; // The tile we know is blank
|
|
int pal=0;
|
|
|
|
// Draw tiles across screen:
|
|
tilex=(-ts->hscroll)>>3;
|
|
ty=(ts->line&15)<<1; // Y-Offset into tile
|
|
dx=((ts->hscroll-1)&7)+1;
|
|
cells = ts->cells;
|
|
if(dx != 8) cells++; // have hscroll, need to draw 1 cell more
|
|
|
|
for (; cells; dx+=8,tilex++,cells--)
|
|
{
|
|
int zero=0;
|
|
|
|
code=Pico.vram[ts->nametab+(tilex&ts->xmask)];
|
|
if (code==blank) continue;
|
|
if (code>>15) { // high priority tile
|
|
int cval = (code&0xfc00) | (dx<<16) | (ty<<25);
|
|
cval|=(code&0x3ff)<<1;
|
|
if(code&0x1000) cval^=0xf<<26;
|
|
*ts->hc++ = cval; // cache it
|
|
continue;
|
|
}
|
|
|
|
if (code!=oldcode) {
|
|
oldcode = code;
|
|
// Get tile address/2:
|
|
addr=(code&0x7ff)<<5;
|
|
if (code&0x1000) addr+=30-ty; else addr+=ty; // Y-flip
|
|
|
|
// pal=Pico.cram+((code>>9)&0x30);
|
|
pal=((code>>9)&0x30);
|
|
}
|
|
|
|
if (code&0x0800) zero=TileFlip(dx,addr,pal);
|
|
else zero=TileNorm(dx,addr,pal);
|
|
|
|
if (zero) blank=code; // We know this tile is blank now
|
|
}
|
|
|
|
// terminate the cache list
|
|
*ts->hc = 0;
|
|
}
|
|
|
|
// --------------------------------------------
|
|
|
|
#ifndef _ASM_DRAW_C
|
|
static void DrawLayer(int plane_sh, int *hcache, int cellskip, int maxcells)
|
|
{
|
|
struct PicoVideo *pvid=&Pico.video;
|
|
const char shift[4]={5,6,5,7}; // 32,64 or 128 sized tilemaps (2 is invalid)
|
|
struct TileStrip ts;
|
|
int width, height, ymask;
|
|
int vscroll, htab;
|
|
|
|
ts.hc=hcache;
|
|
ts.cells=maxcells;
|
|
|
|
// Work out the TileStrip to draw
|
|
|
|
// Work out the name table size: 32 64 or 128 tiles (0-3)
|
|
width=pvid->reg[16];
|
|
height=(width>>4)&3; width&=3;
|
|
|
|
ts.xmask=(1<<shift[width])-1; // X Mask in tiles (0x1f-0x7f)
|
|
ymask=(height<<8)|0xff; // Y Mask in pixels
|
|
if(width == 1) ymask&=0x1ff;
|
|
else if(width>1) ymask =0x0ff;
|
|
|
|
// Find name table:
|
|
if (plane_sh&1) ts.nametab=(pvid->reg[4]&0x07)<<12; // B
|
|
else ts.nametab=(pvid->reg[2]&0x38)<< 9; // A
|
|
|
|
htab=pvid->reg[13]<<9; // Horizontal scroll table address
|
|
if ( pvid->reg[11]&2) htab+=Scanline<<1; // Offset by line
|
|
if ((pvid->reg[11]&1)==0) htab&=~0xf; // Offset by tile
|
|
htab+=plane_sh&1; // A or B
|
|
|
|
// Get horizontal scroll value, will be masked later
|
|
ts.hscroll=Pico.vram[htab&0x7fff];
|
|
|
|
if((pvid->reg[12]&6) == 6) {
|
|
// interlace mode 2
|
|
vscroll=Pico.vsram[plane_sh&1]; // Get vertical scroll value
|
|
|
|
// Find the line in the name table
|
|
ts.line=(vscroll+(Scanline<<1))&((ymask<<1)|1);
|
|
ts.nametab+=(ts.line>>4)<<shift[width];
|
|
|
|
DrawStripInterlace(&ts);
|
|
} else if( pvid->reg[11]&4) {
|
|
// shit, we have 2-cell column based vscroll
|
|
// luckily this doesn't happen too often
|
|
ts.line=ymask|(shift[width]<<24); // save some stuff instead of line
|
|
DrawStripVSRam(&ts, plane_sh, cellskip);
|
|
} else {
|
|
vscroll=Pico.vsram[plane_sh&1]; // Get vertical scroll value
|
|
|
|
// Find the line in the name table
|
|
ts.line=(vscroll+Scanline)&ymask;
|
|
ts.nametab+=(ts.line>>3)<<shift[width];
|
|
|
|
DrawStrip(&ts, plane_sh, cellskip);
|
|
}
|
|
}
|
|
|
|
|
|
// --------------------------------------------
|
|
|
|
// tstart & tend are tile pair numbers
|
|
static void DrawWindow(int tstart, int tend, int prio, int sh) // int *hcache
|
|
{
|
|
struct PicoVideo *pvid=&Pico.video;
|
|
int tilex=0,ty=0,nametab,code=0;
|
|
int blank=-1; // The tile we know is blank
|
|
|
|
// Find name table line:
|
|
if (pvid->reg[12]&1)
|
|
{
|
|
nametab=(pvid->reg[3]&0x3c)<<9; // 40-cell mode
|
|
nametab+=(Scanline>>3)<<6;
|
|
}
|
|
else
|
|
{
|
|
nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode
|
|
nametab+=(Scanline>>3)<<5;
|
|
}
|
|
|
|
tilex=tstart<<1;
|
|
tend<<=1;
|
|
|
|
ty=(Scanline&7)<<1; // Y-Offset into tile
|
|
|
|
if(!(rendstatus&2)) {
|
|
// check the first tile code
|
|
code=Pico.vram[nametab+tilex];
|
|
// if the whole window uses same priority (what is often the case), we may be able to skip this field
|
|
if((code>>15) != prio) return;
|
|
}
|
|
|
|
// Draw tiles across screen:
|
|
for (; tilex < tend; tilex++)
|
|
{
|
|
int addr=0,zero=0;
|
|
int pal;
|
|
|
|
code=Pico.vram[nametab+tilex];
|
|
if(code==blank) continue;
|
|
if((code>>15) != prio) {
|
|
rendstatus|=2;
|
|
continue;
|
|
}
|
|
|
|
pal=((code>>9)&0x30);
|
|
|
|
if(sh) {
|
|
int tmp, *zb = (int *)(HighCol+8+(tilex<<3));
|
|
if(prio) {
|
|
tmp = *zb;
|
|
if(!(tmp&0x00000080)) tmp&=~0x000000c0; if(!(tmp&0x00008000)) tmp&=~0x0000c000;
|
|
if(!(tmp&0x00800000)) tmp&=~0x00c00000; if(!(tmp&0x80000000)) tmp&=~0xc0000000;
|
|
*zb++=tmp; tmp = *zb;
|
|
if(!(tmp&0x00000080)) tmp&=~0x000000c0; if(!(tmp&0x00008000)) tmp&=~0x0000c000;
|
|
if(!(tmp&0x00800000)) tmp&=~0x00c00000; if(!(tmp&0x80000000)) tmp&=~0xc0000000;
|
|
*zb++=tmp;
|
|
} else {
|
|
pal |= 0x40;
|
|
}
|
|
}
|
|
|
|
// Get tile address/2:
|
|
addr=(code&0x7ff)<<4;
|
|
if (code&0x1000) addr+=14-ty; else addr+=ty; // Y-flip
|
|
|
|
if (code&0x0800) zero=TileFlip(8+(tilex<<3),addr,pal);
|
|
else zero=TileNorm(8+(tilex<<3),addr,pal);
|
|
|
|
if (zero) blank=code; // We know this tile is blank now
|
|
}
|
|
|
|
// terminate the cache list
|
|
//*hcache = 0;
|
|
}
|
|
|
|
// --------------------------------------------
|
|
|
|
static void DrawTilesFromCache(int *hc, int sh, int rlim)
|
|
{
|
|
int code, addr, dx;
|
|
int pal;
|
|
|
|
// *ts->hc++ = code | (dx<<16) | (ty<<25); // cache it
|
|
|
|
if (sh && (rendstatus&0xc0))
|
|
{
|
|
if (!(rendstatus&0x80))
|
|
{
|
|
// as some layer has covered whole line with hi priority tiles,
|
|
// we can process whole line and then act as if sh/hi mode was off.
|
|
rendstatus|=0x80;
|
|
int c = 320/4, *zb = (int *)(HighCol+8);
|
|
while (c--)
|
|
{
|
|
int tmp = *zb;
|
|
if (!(tmp & 0x80808080)) *zb=tmp&0x3f3f3f3f;
|
|
else {
|
|
if(!(tmp&0x00000080)) tmp&=~0x000000c0; if(!(tmp&0x00008000)) tmp&=~0x0000c000;
|
|
if(!(tmp&0x00800000)) tmp&=~0x00c00000; if(!(tmp&0x80000000)) tmp&=~0xc0000000;
|
|
*zb=tmp;
|
|
}
|
|
zb++;
|
|
}
|
|
}
|
|
sh = 0;
|
|
}
|
|
|
|
if (sh)
|
|
{
|
|
while ((code=*hc++)) {
|
|
unsigned char *zb;
|
|
// Get tile address/2:
|
|
addr=(code&0x7ff)<<4;
|
|
addr+=(unsigned int)code>>25; // y offset into tile
|
|
dx=(code>>16)&0x1ff;
|
|
zb = HighCol+dx;
|
|
if(!(*zb&0x80)) *zb&=0x3f; zb++; if(!(*zb&0x80)) *zb&=0x3f; zb++;
|
|
if(!(*zb&0x80)) *zb&=0x3f; zb++; if(!(*zb&0x80)) *zb&=0x3f; zb++;
|
|
if(!(*zb&0x80)) *zb&=0x3f; zb++; if(!(*zb&0x80)) *zb&=0x3f; zb++;
|
|
if(!(*zb&0x80)) *zb&=0x3f; zb++; if(!(*zb&0x80)) *zb&=0x3f; zb++;
|
|
|
|
pal=((code>>9)&0x30);
|
|
if (rlim-dx < 0) goto last_cut_tile;
|
|
|
|
if (code&0x0800) TileFlip(dx,addr,pal);
|
|
else TileNorm(dx,addr,pal);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
short blank=-1; // The tile we know is blank
|
|
while ((code=*hc++)) {
|
|
int zero;
|
|
if((short)code == blank) continue;
|
|
// Get tile address/2:
|
|
addr=(code&0x7ff)<<4;
|
|
addr+=(unsigned int)code>>25; // y offset into tile
|
|
dx=(code>>16)&0x1ff;
|
|
|
|
pal=((code>>9)&0x30);
|
|
if (rlim-dx < 0) goto last_cut_tile;
|
|
|
|
if (code&0x0800) zero=TileFlip(dx,addr,pal);
|
|
else zero=TileNorm(dx,addr,pal);
|
|
|
|
if (zero) blank=(short)code;
|
|
}
|
|
}
|
|
return;
|
|
|
|
last_cut_tile:
|
|
{
|
|
unsigned int t, pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
|
|
unsigned char *pd = HighCol+dx;
|
|
if (!pack) return;
|
|
if (code&0x0800)
|
|
{
|
|
switch (rlim-dx+8)
|
|
{
|
|
case 7: t=pack&0x00000f00; if (t) pd[6]=(unsigned char)(pal|(t>> 8)); // "break" is left out intentionally
|
|
case 6: t=pack&0x000000f0; if (t) pd[5]=(unsigned char)(pal|(t>> 4));
|
|
case 5: t=pack&0x0000000f; if (t) pd[4]=(unsigned char)(pal|(t ));
|
|
case 4: t=pack&0xf0000000; if (t) pd[3]=(unsigned char)(pal|(t>>28));
|
|
case 3: t=pack&0x0f000000; if (t) pd[2]=(unsigned char)(pal|(t>>24));
|
|
case 2: t=pack&0x00f00000; if (t) pd[1]=(unsigned char)(pal|(t>>20));
|
|
case 1: t=pack&0x000f0000; if (t) pd[0]=(unsigned char)(pal|(t>>16));
|
|
default: break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
switch (rlim-dx+8)
|
|
{
|
|
case 7: t=pack&0x00f00000; if (t) pd[6]=(unsigned char)(pal|(t>>20));
|
|
case 6: t=pack&0x0f000000; if (t) pd[5]=(unsigned char)(pal|(t>>24));
|
|
case 5: t=pack&0xf0000000; if (t) pd[4]=(unsigned char)(pal|(t>>28));
|
|
case 4: t=pack&0x0000000f; if (t) pd[3]=(unsigned char)(pal|(t ));
|
|
case 3: t=pack&0x000000f0; if (t) pd[2]=(unsigned char)(pal|(t>> 4));
|
|
case 2: t=pack&0x00000f00; if (t) pd[1]=(unsigned char)(pal|(t>> 8));
|
|
case 1: t=pack&0x0000f000; if (t) pd[0]=(unsigned char)(pal|(t>>12));
|
|
default: break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// --------------------------------------------
|
|
|
|
// Index + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size
|
|
// Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
|
|
|
|
static void DrawSprite(int *sprite, int **hc, int sh)
|
|
{
|
|
int width=0,height=0;
|
|
int row=0,code=0;
|
|
int pal;
|
|
int tile=0,delta=0;
|
|
int sx, sy;
|
|
int (*fTileFunc)(int sx,int addr,int pal);
|
|
|
|
// parse the sprite data
|
|
sy=sprite[0];
|
|
code=sprite[1];
|
|
sx=code>>16; // X
|
|
width=sy>>28;
|
|
height=(sy>>24)&7; // Width and height in tiles
|
|
sy=(sy<<16)>>16; // Y
|
|
|
|
row=Scanline-sy; // Row of the sprite we are on
|
|
|
|
if (code&0x1000) row=(height<<3)-1-row; // Flip Y
|
|
|
|
tile=code&0x7ff; // Tile number
|
|
tile+=row>>3; // Tile number increases going down
|
|
delta=height; // Delta to increase tile by going right
|
|
if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
|
|
|
|
tile<<=4; tile+=(row&7)<<1; // Tile address
|
|
|
|
if(code&0x8000) { // high priority - cache it
|
|
*(*hc)++ = (tile<<16)|((code&0x0800)<<5)|((sx<<6)&0x0000ffc0)|((code>>9)&0x30)|((sprite[0]>>16)&0xf);
|
|
} else {
|
|
delta<<=4; // Delta of address
|
|
pal=((code>>9)&0x30)|(sh<<6);
|
|
|
|
if(sh && (code&0x6000) == 0x6000) {
|
|
if(code&0x0800) fTileFunc=TileFlipSH;
|
|
else fTileFunc=TileNormSH;
|
|
} else {
|
|
if(code&0x0800) fTileFunc=TileFlip;
|
|
else fTileFunc=TileNorm;
|
|
}
|
|
|
|
for (; width; width--,sx+=8,tile+=delta)
|
|
{
|
|
if(sx<=0) continue;
|
|
if(sx>=328) break; // Offscreen
|
|
|
|
tile&=0x7fff; // Clip tile address
|
|
fTileFunc(sx,tile,pal);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
// Index + 0 : hhhhvvvv s---hhvv yyyyyyyy yyyyyyyy // s: skip flag, h: horiz. size
|
|
// Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
|
|
|
|
static void DrawSpriteZ(int pack, int pack2, int shpri, int sprio)
|
|
{
|
|
int width=0,height=0;
|
|
int row=0;
|
|
int pal;
|
|
int tile=0,delta=0;
|
|
int sx, sy;
|
|
int (*fTileFunc)(int sx,int addr,int pal,int zval);
|
|
|
|
// parse the sprite data
|
|
sx=pack2>>16; // X
|
|
sy=(pack <<16)>>16; // Y
|
|
width=pack>>28;
|
|
height=(pack>>24)&7; // Width and height in tiles
|
|
|
|
row=Scanline-sy; // Row of the sprite we are on
|
|
|
|
if (pack2&0x1000) row=(height<<3)-1-row; // Flip Y
|
|
|
|
tile=pack2&0x7ff; // Tile number
|
|
tile+=row>>3; // Tile number increases going down
|
|
delta=height; // Delta to increase tile by going right
|
|
if (pack2&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
|
|
|
|
tile<<=4; tile+=(row&7)<<1; // Tile address
|
|
delta<<=4; // Delta of address
|
|
pal=((pack2>>9)&0x30);
|
|
if((shpri&1)&&!(shpri&2)) pal|=0x40;
|
|
|
|
shpri&=1;
|
|
if((pack2&0x6000) != 0x6000) shpri = 0;
|
|
shpri |= (pack2&0x0800)>>10;
|
|
switch(shpri) {
|
|
default:
|
|
case 0: fTileFunc=TileNormZ; break;
|
|
case 1: fTileFunc=TileNormZSH; break;
|
|
case 2: fTileFunc=TileFlipZ; break;
|
|
case 3: fTileFunc=TileFlipZSH; break;
|
|
}
|
|
|
|
for (; width; width--,sx+=8,tile+=delta)
|
|
{
|
|
if(sx<=0) continue;
|
|
if(sx>=328) break; // Offscreen
|
|
|
|
tile&=0x7fff; // Clip tile address
|
|
fTileFunc(sx,tile,pal,sprio);
|
|
}
|
|
}
|
|
|
|
static void DrawSpriteInterlace(unsigned int *sprite)
|
|
{
|
|
int width=0,height=0;
|
|
int row=0,code=0;
|
|
int pal;
|
|
int tile=0,delta=0;
|
|
int sx, sy;
|
|
|
|
// parse the sprite data
|
|
sy=sprite[0];
|
|
height=sy>>24;
|
|
sy=(sy&0x3ff)-0x100; // Y
|
|
width=(height>>2)&3; height&=3;
|
|
width++; height++; // Width and height in tiles
|
|
|
|
row=(Scanline<<1)-sy; // Row of the sprite we are on
|
|
|
|
code=sprite[1];
|
|
sx=((code>>16)&0x1ff)-0x78; // X
|
|
|
|
if (code&0x1000) row^=(16<<height)-1; // Flip Y
|
|
|
|
tile=code&0x3ff; // Tile number
|
|
tile+=row>>4; // Tile number increases going down
|
|
delta=height; // Delta to increase tile by going right
|
|
if (code&0x0800) { tile+=delta*(width-1); delta=-delta; } // Flip X
|
|
|
|
tile<<=5; tile+=(row&15)<<1; // Tile address
|
|
|
|
delta<<=5; // Delta of address
|
|
pal=((code>>9)&0x30); // Get palette pointer
|
|
|
|
for (; width; width--,sx+=8,tile+=delta)
|
|
{
|
|
if(sx<=0) continue;
|
|
if(sx>=328) break; // Offscreen
|
|
|
|
tile&=0x7fff; // Clip tile address
|
|
if (code&0x0800) TileFlip(sx,tile,pal);
|
|
else TileNorm(sx,tile,pal);
|
|
}
|
|
}
|
|
|
|
|
|
static void DrawAllSpritesInterlace(int pri, int maxwidth)
|
|
{
|
|
struct PicoVideo *pvid=&Pico.video;
|
|
int i,u,table,link=0,sline=Scanline<<1;
|
|
unsigned int *sprites[80]; // Sprite index
|
|
|
|
table=pvid->reg[5]&0x7f;
|
|
if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode
|
|
table<<=8; // Get sprite table address/2
|
|
|
|
for (i=u=0; u < 80 && i < 21; u++)
|
|
{
|
|
unsigned int *sprite;
|
|
int code, sx, sy, height;
|
|
|
|
sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
|
|
|
|
// get sprite info
|
|
code = sprite[0];
|
|
sx = sprite[1];
|
|
if(((sx>>15)&1) != pri) goto nextsprite; // wrong priority sprite
|
|
|
|
// check if it is on this line
|
|
sy = (code&0x3ff)-0x100;
|
|
height = (((code>>24)&3)+1)<<4;
|
|
if(sline < sy || sline >= sy+height) goto nextsprite; // no
|
|
|
|
// check if sprite is not hidden offscreen
|
|
sx = (sx>>16)&0x1ff;
|
|
sx -= 0x78; // Get X coordinate + 8
|
|
if(sx <= -8*3 || sx >= maxwidth) goto nextsprite;
|
|
|
|
// sprite is good, save it's pointer
|
|
sprites[i++]=sprite;
|
|
|
|
nextsprite:
|
|
// Find next sprite
|
|
link=(code>>16)&0x7f;
|
|
if(!link) break; // End of sprites
|
|
}
|
|
|
|
// Go through sprites backwards:
|
|
for (i-- ;i>=0; i--)
|
|
DrawSpriteInterlace(sprites[i]);
|
|
}
|
|
|
|
|
|
#ifndef _ASM_DRAW_C
|
|
static void DrawSpritesFromCache(int *hc, int sh)
|
|
{
|
|
int code, tile, sx, delta, width;
|
|
int pal;
|
|
int (*fTileFunc)(int sx,int addr,int pal);
|
|
|
|
// *(*hc)++ = (tile<<16)|((code&0x0800)<<5)|((sx<<6)&0x0000ffc0)|((code>>9)&0x30)|((sprite[0]>>24)&0xf);
|
|
|
|
while((code=*hc++)) {
|
|
pal=(code&0x30);
|
|
delta=code&0xf;
|
|
width=delta>>2; delta&=3;
|
|
width++; delta++; // Width and height in tiles
|
|
if (code&0x10000) delta=-delta; // Flip X
|
|
delta<<=4;
|
|
tile=((unsigned int)code>>17)<<1;
|
|
sx=(code<<16)>>22; // sx can be negative (start offscreen), so sign extend
|
|
|
|
if(sh && pal == 0x30) { //
|
|
if(code&0x10000) fTileFunc=TileFlipSH;
|
|
else fTileFunc=TileNormSH;
|
|
} else {
|
|
if(code&0x10000) fTileFunc=TileFlip;
|
|
else fTileFunc=TileNorm;
|
|
}
|
|
|
|
for (; width; width--,sx+=8,tile+=delta)
|
|
{
|
|
if(sx<=0) continue;
|
|
if(sx>=328) break; // Offscreen
|
|
|
|
tile&=0x7fff; // Clip tile address
|
|
fTileFunc(sx,tile,pal);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
// Index + 0 : ----hhvv -lllllll -------y yyyyyyyy
|
|
// Index + 4 : -------x xxxxxxxx pccvhnnn nnnnnnnn
|
|
// v
|
|
// Index + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size
|
|
// Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
|
|
|
|
static void PrepareSprites(int full)
|
|
{
|
|
struct PicoVideo *pvid=&Pico.video;
|
|
int u=0,link=0,sblocks=0;
|
|
int table=0;
|
|
int *pd = HighPreSpr;
|
|
|
|
table=pvid->reg[5]&0x7f;
|
|
if (pvid->reg[12]&1) table&=0x7e; // Lowest bit 0 in 40-cell mode
|
|
table<<=8; // Get sprite table address/2
|
|
|
|
if (!full)
|
|
{
|
|
int pack;
|
|
// updates: tilecode, sx
|
|
for (u=0; u < 80 && (pack = *pd); u++, pd+=2)
|
|
{
|
|
unsigned int *sprite;
|
|
int code, code2, sx, sy, skip=0;
|
|
|
|
sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
|
|
|
|
// parse sprite info
|
|
code = sprite[0];
|
|
code2 = sprite[1];
|
|
code2 &= ~0xfe000000;
|
|
code2 -= 0x00780000; // Get X coordinate + 8 in upper 16 bits
|
|
sx = code2>>16;
|
|
|
|
if((sx <= 8-((pack>>28)<<3) && sx >= -0x76) || sx >= 328) skip=1<<23;
|
|
else if ((sy = (pack<<16)>>16) < 240 && sy > -32) {
|
|
int sbl = (2<<(pack>>28))-1;
|
|
sblocks |= sbl<<(sy>>3);
|
|
}
|
|
|
|
*pd = (pack&~(1<<23))|skip;
|
|
*(pd+1) = code2;
|
|
|
|
// Find next sprite
|
|
link=(code>>16)&0x7f;
|
|
if(!link) break; // End of sprites
|
|
}
|
|
SpriteBlocks |= sblocks;
|
|
}
|
|
else
|
|
{
|
|
for (; u < 80; u++)
|
|
{
|
|
unsigned int *sprite;
|
|
int code, code2, sx, sy, hv, height, width, skip=0, sx_min;
|
|
|
|
sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
|
|
|
|
// parse sprite info
|
|
code = sprite[0];
|
|
sy = (code&0x1ff)-0x80;
|
|
hv = (code>>24)&0xf;
|
|
height = (hv&3)+1;
|
|
|
|
if(sy > 240 || sy + (height<<3) <= 0) skip|=1<<22;
|
|
|
|
width = (hv>>2)+1;
|
|
code2 = sprite[1];
|
|
sx = (code2>>16)&0x1ff;
|
|
sx -= 0x78; // Get X coordinate + 8
|
|
sx_min = 8-(width<<3);
|
|
|
|
if((sx <= sx_min && sx >= -0x76) || sx >= 328) skip|=1<<23;
|
|
else if (sx > sx_min && !skip) {
|
|
int sbl = (2<<height)-1;
|
|
int shi = sy>>3;
|
|
if(shi < 0) shi=0; // negative sy
|
|
sblocks |= sbl<<shi;
|
|
}
|
|
|
|
*pd++ = (width<<28)|(height<<24)|skip|(hv<<16)|((unsigned short)sy);
|
|
*pd++ = (sx<<16)|((unsigned short)code2);
|
|
|
|
// Find next sprite
|
|
link=(code>>16)&0x7f;
|
|
if(!link) break; // End of sprites
|
|
}
|
|
SpriteBlocks = sblocks;
|
|
*pd = 0; // terminate
|
|
}
|
|
}
|
|
|
|
static void DrawAllSprites(int *hcache, int maxwidth, int prio, int sh)
|
|
{
|
|
int i,u,n;
|
|
int sx1seen=0; // sprite with x coord 1 or 0 seen
|
|
int ntiles = 0; // tile counter for sprite limit emulation
|
|
int *sprites[40]; // Sprites to draw in fast mode
|
|
int *ps, pack, rs = rendstatus, scan=Scanline;
|
|
|
|
if(rs&8) {
|
|
DrawAllSpritesInterlace(prio, maxwidth);
|
|
return;
|
|
}
|
|
if(rs&0x11) {
|
|
//dprintf("PrepareSprites(%i) [%i]", (rs>>4)&1, scan);
|
|
PrepareSprites(rs&0x10);
|
|
rendstatus=rs&~0x11;
|
|
}
|
|
if (!(SpriteBlocks & (1<<(scan>>3)))) return;
|
|
|
|
if(((rs&4)||sh)&&prio==0)
|
|
memset(HighSprZ, 0, 328);
|
|
if(!(rs&4)&&prio) {
|
|
if(hcache[0]) DrawSpritesFromCache(hcache, sh);
|
|
return;
|
|
}
|
|
|
|
ps = HighPreSpr;
|
|
|
|
// Index + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size
|
|
// Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
|
|
|
|
for(i=u=n=0; (pack = *ps) && n < 20; ps+=2, u++)
|
|
{
|
|
int sx, sy, row, pack2;
|
|
|
|
if(pack & 0x00400000) continue;
|
|
|
|
// get sprite info
|
|
pack2 = *(ps+1);
|
|
sx = pack2>>16;
|
|
sy = (pack <<16)>>16;
|
|
row = scan-sy;
|
|
|
|
//dprintf("x: %i y: %i %ix%i", sx, sy, (pack>>28)<<3, (pack>>21)&0x38);
|
|
|
|
if(sx == -0x77) sx1seen|=1; // for masking mode 2
|
|
|
|
// check if it is on this line
|
|
if(row < 0 || row >= ((pack>>21)&0x38)) continue; // no
|
|
n++; // number of sprites on this line (both visible and hidden, max is 20) [broken]
|
|
|
|
// sprite limit
|
|
ntiles += pack>>28;
|
|
if(ntiles > 40) break;
|
|
|
|
if(pack & 0x00800000) continue;
|
|
|
|
// masking sprite?
|
|
if(sx == -0x78) {
|
|
if(!(sx1seen&1) || sx1seen==3) {
|
|
break; // this sprite is not drawn and remaining sprites are masked
|
|
}
|
|
if((sx1seen>>8) == 0) sx1seen=(i+1)<<8;
|
|
continue;
|
|
}
|
|
else if(sx == -0x77) {
|
|
// masking mode2 (Outrun, Galaxy Force II, Shadow of the beast)
|
|
if(sx1seen>>8) { i=(sx1seen>>8)-1; break; } // seen both 0 and 1
|
|
sx1seen |= 2;
|
|
continue;
|
|
}
|
|
|
|
// accurate sprites
|
|
//dprintf("P:%i",((sx>>15)&1));
|
|
if(rs&4) {
|
|
// might need to skip this sprite
|
|
if((pack2&0x8000) ^ (prio<<15)) continue;
|
|
DrawSpriteZ(pack,pack2,sh|(prio<<1),(char)(0x1f-n));
|
|
continue;
|
|
}
|
|
|
|
// sprite is good, save it's pointer
|
|
sprites[i++]=ps;
|
|
}
|
|
|
|
// Go through sprites backwards:
|
|
if(!(rs&4)) {
|
|
for (i--; i>=0; i--)
|
|
DrawSprite(sprites[i],&hcache,sh);
|
|
|
|
// terminate cache list
|
|
*hcache = 0;
|
|
}
|
|
}
|
|
|
|
|
|
// --------------------------------------------
|
|
|
|
#ifndef _ASM_DRAW_C
|
|
static void BackFill(int reg7, int sh)
|
|
{
|
|
unsigned int back=0;
|
|
unsigned int *pd=NULL,*end=NULL;
|
|
|
|
// Start with a blank scanline (background colour):
|
|
back=reg7&0x3f;
|
|
back|=sh<<6;
|
|
back|=back<<8;
|
|
back|=back<<16;
|
|
|
|
pd= (unsigned int *)(HighCol+8);
|
|
end=(unsigned int *)(HighCol+8+320);
|
|
|
|
do { pd[0]=pd[1]=pd[2]=pd[3]=back; pd+=4; } while (pd<end);
|
|
}
|
|
#endif
|
|
|
|
// --------------------------------------------
|
|
|
|
unsigned short HighPal[0x100];
|
|
|
|
#ifndef _ASM_DRAW_C
|
|
static void FinalizeLineBGR444(int sh)
|
|
{
|
|
unsigned short *pd=DrawLineDest;
|
|
unsigned char *ps=HighCol+8;
|
|
unsigned short *pal=Pico.cram;
|
|
int len, i, t;
|
|
|
|
if (Pico.video.reg[12]&1) {
|
|
len = 320;
|
|
} else {
|
|
if(!(PicoOpt&0x100)) pd+=32;
|
|
len = 256;
|
|
}
|
|
|
|
if(sh) {
|
|
pal=HighPal;
|
|
if(Pico.m.dirtyPal) {
|
|
blockcpy(pal, Pico.cram, 0x40*2);
|
|
// shadowed pixels
|
|
for(i = 0x3f; i >= 0; i--)
|
|
pal[0x40|i] = pal[0xc0|i] = (unsigned short)((pal[i]>>1)&0x0777);
|
|
// hilighted pixels
|
|
for(i = 0x3f; i >= 0; i--) {
|
|
t=pal[i]&0xeee;t+=0x444;if(t&0x10)t|=0xe;if(t&0x100)t|=0xe0;if(t&0x1000)t|=0xe00;t&=0xeee;
|
|
pal[0x80|i]=(unsigned short)t;
|
|
}
|
|
Pico.m.dirtyPal = 0;
|
|
}
|
|
}
|
|
|
|
for(i = 0; i < len; i++)
|
|
pd[i] = pal[ps[i]];
|
|
}
|
|
|
|
|
|
static void FinalizeLineRGB555(int sh)
|
|
{
|
|
unsigned short *pd=DrawLineDest;
|
|
unsigned char *ps=HighCol+8;
|
|
unsigned short *pal=HighPal;
|
|
int len, i, t, dirtyPal = Pico.m.dirtyPal;
|
|
|
|
if(dirtyPal) {
|
|
unsigned short *ppal=Pico.cram;
|
|
for(i = 0x3f; i >= 0; i--)
|
|
pal[i] = (unsigned short) (((ppal[i]&0x00f)<<12)|((ppal[i]&0x0f0)<<3)|((ppal[i]&0xf00)>>7));
|
|
Pico.m.dirtyPal = 0;
|
|
}
|
|
|
|
if (Pico.video.reg[12]&1) {
|
|
len = 320;
|
|
} else {
|
|
if(!(PicoOpt&0x100)) pd+=32;
|
|
len = 256;
|
|
}
|
|
|
|
if(sh) {
|
|
if(dirtyPal) {
|
|
// shadowed pixels
|
|
for(i = 0x3f; i >= 0; i--)
|
|
pal[0x40|i] = pal[0xc0|i] = (unsigned short)((pal[i]>>1)&0x738e);
|
|
// hilighted pixels
|
|
for(i = 0x3f; i >= 0; i--) {
|
|
t=pal[i]&0xe71c;t+=0x4208;if(t&0x20)t|=0x1c;if(t&0x800)t|=0x700;if(t&0x10000)t|=0xe000;t&=0xe71c;
|
|
pal[0x80|i]=(unsigned short)t;
|
|
}
|
|
}
|
|
}
|
|
|
|
for(i = 0; i < len; i++)
|
|
pd[i] = pal[ps[i]];
|
|
}
|
|
#endif
|
|
|
|
static void FinalizeLine8bit(int sh)
|
|
{
|
|
unsigned char *pd=DrawLineDest;
|
|
int len, rs = rendstatus;
|
|
static int dirty_count;
|
|
|
|
if (!sh && Pico.m.dirtyPal == 1 && Scanline < 222) {
|
|
// a hack for mid-frame palette changes
|
|
if (!(rs & 0x20))
|
|
dirty_count = 1;
|
|
else dirty_count++;
|
|
rs |= 0x20;
|
|
rendstatus = rs;
|
|
if (dirty_count == 3) {
|
|
blockcpy(HighPal, Pico.cram, 0x40*2);
|
|
} else if (dirty_count == 11) {
|
|
blockcpy(HighPal+0x40, Pico.cram, 0x40*2);
|
|
}
|
|
}
|
|
|
|
if (Pico.video.reg[12]&1) {
|
|
len = 320;
|
|
} else {
|
|
if(!(PicoOpt&0x100)) pd+=32;
|
|
len = 256;
|
|
}
|
|
|
|
if (!sh && rs & 0x20) {
|
|
if (dirty_count >= 11) {
|
|
blockcpy_or(pd, HighCol+8, len, 0x80);
|
|
} else {
|
|
blockcpy_or(pd, HighCol+8, len, 0x40);
|
|
}
|
|
} else {
|
|
blockcpy(pd, HighCol+8, len);
|
|
}
|
|
}
|
|
|
|
static void (*FinalizeLine)(int sh) = FinalizeLineBGR444;
|
|
|
|
// --------------------------------------------
|
|
|
|
static int DrawDisplay(int sh)
|
|
{
|
|
struct PicoVideo *pvid=&Pico.video;
|
|
int win=0,edge=0,hvwind=0;
|
|
int maxw, maxcells;
|
|
|
|
rendstatus&=~0xc0;
|
|
|
|
if(pvid->reg[12]&1) {
|
|
maxw = 328; maxcells = 40;
|
|
} else {
|
|
maxw = 264; maxcells = 32;
|
|
}
|
|
|
|
// Find out if the window is on this line:
|
|
win=pvid->reg[0x12];
|
|
edge=(win&0x1f)<<3;
|
|
|
|
if (win&0x80) { if (Scanline>=edge) hvwind=1; }
|
|
else { if (Scanline< edge) hvwind=1; }
|
|
|
|
if (!hvwind) { // we might have a vertical window here
|
|
win=pvid->reg[0x11];
|
|
edge=win&0x1f;
|
|
if (win&0x80) {
|
|
if (!edge) hvwind=1;
|
|
else if(edge < (maxcells>>1)) hvwind=2;
|
|
} else {
|
|
if (!edge);
|
|
else if(edge < (maxcells>>1)) hvwind=2;
|
|
else hvwind=1;
|
|
}
|
|
}
|
|
|
|
DrawLayer(1|(sh<<1), HighCacheB, 0, maxcells);
|
|
if (hvwind == 1)
|
|
DrawWindow(0, maxcells>>1, 0, sh);
|
|
else if (hvwind == 2) {
|
|
// ahh, we have vertical window
|
|
DrawLayer(0|(sh<<1), HighCacheA, (win&0x80) ? 0 : edge<<1, (win&0x80) ? edge<<1 : maxcells);
|
|
DrawWindow( (win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 0, sh);
|
|
} else
|
|
DrawLayer(0|(sh<<1), HighCacheA, 0, maxcells);
|
|
DrawAllSprites(HighCacheS, maxw, 0, sh);
|
|
|
|
if (HighCacheB[0]) DrawTilesFromCache(HighCacheB, sh, 328);
|
|
if (hvwind == 1)
|
|
DrawWindow(0, maxcells>>1, 1, sh);
|
|
else if (hvwind == 2) {
|
|
if(HighCacheA[0]) DrawTilesFromCache(HighCacheA, sh, (win&0x80) ? edge<<4 : 328);
|
|
DrawWindow((win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 1, sh);
|
|
} else
|
|
if (HighCacheA[0]) DrawTilesFromCache(HighCacheA, sh, 328);
|
|
DrawAllSprites(HighCacheS, maxw, 1, sh);
|
|
|
|
#if 0
|
|
{
|
|
int *c, a, b;
|
|
for (a = 0, c = HighCacheA; *c; c++, a++);
|
|
for (b = 0, c = HighCacheB; *c; c++, b++);
|
|
printf("%i:%03i: a=%i, b=%i\n", Pico.m.frame_count, Scanline, a, b);
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int Skip=0;
|
|
|
|
PICO_INTERNAL void PicoFrameStart(void)
|
|
{
|
|
// prepare to do this frame
|
|
rendstatus = (PicoOpt&0x80)>>5; // accurate sprites
|
|
if(rendstatus)
|
|
Pico.video.status &= ~0x0020;
|
|
else Pico.video.status |= 0x0020; // sprite collision
|
|
if((Pico.video.reg[12]&6) == 6) rendstatus |= 8; // interlace mode
|
|
if(Pico.m.dirtyPal) Pico.m.dirtyPal = 2; // reset dirty if needed
|
|
|
|
PrepareSprites(1);
|
|
Skip=0;
|
|
}
|
|
|
|
PICO_INTERNAL int PicoLine(int scan)
|
|
{
|
|
int sh;
|
|
if (Skip>0) { Skip--; return 0; } // Skip rendering lines
|
|
|
|
Scanline=scan;
|
|
sh=(Pico.video.reg[0xC]&8)>>3; // shadow/hilight?
|
|
|
|
// Draw screen:
|
|
BackFill(Pico.video.reg[7], sh);
|
|
if (Pico.video.reg[1]&0x40)
|
|
DrawDisplay(sh);
|
|
|
|
if (FinalizeLine != NULL)
|
|
FinalizeLine(sh);
|
|
|
|
Skip=PicoScan(Scanline,DrawLineDest);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
void PicoDrawSetColorFormat(int which)
|
|
{
|
|
switch (which)
|
|
{
|
|
case 2: FinalizeLine = FinalizeLine8bit; break;
|
|
case 1: FinalizeLine = FinalizeLineRGB555; break;
|
|
case 0: FinalizeLine = FinalizeLineBGR444; break;
|
|
default:FinalizeLine = NULL; break;
|
|
}
|
|
}
|
|
|