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libpicofe/linux/fakedasm.c
notaz bd1806ca32 linux compile fixed 
git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@235 be3aeb3a-fb24-0410-a615-afba39da0efa
2007-09-02 09:35:22 +00:00

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18 KiB
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// This is part of Pico Library
// (c) Copyright 2004 Dave, All rights reserved.
// (c) Copyright 2006 notaz, All rights reserved.
// Free for non-commercial use.
// For commercial use, separate licencing terms must be obtained.
#include "../../Pico/PicoInt.h"
#undef blockcpy
extern unsigned short DefOutBuff[320*2];
extern unsigned char HighCol[8+320+8];
extern char HighSprZ[320+8+8]; // Z-buffer for accurate sprites and shadow/hilight mode
// (if bit 7 == 0, sh caused by tile; if bit 6 == 0 pixel must be shadowed, else hilighted, if bit5 == 1)
// lsb->msb: moved sprites, all window tiles don't use same priority, accurate sprites (copied from PicoOpt), interlace
// dirty sprites, sonic mode
extern int rendstatus;
extern int Scanline; // Scanline
struct TileStrip
{
int nametab; // Position in VRAM of name table (for this tile line)
int line; // Line number in pixels 0x000-0x3ff within the virtual tilemap
int hscroll; // Horizontal scroll value in pixels for the line
int xmask; // X-Mask (0x1f - 0x7f) for horizontal wraparound in the tilemap
int *hc; // cache for high tile codes and their positions
int cells; // cells (tiles) to draw (32 col mode doesn't need to update whole 320)
};
// utility
void *blockcpy(void *dst, const void *src, size_t n)
{
return memcpy(dst, src, n);
}
void blockcpy_or(void *dst, void *src, size_t n, int pat)
{
unsigned char *pd = dst, *ps = src;
for (; n; n--)
*pd++ = (unsigned char) (*ps++ | pat);
}
static int TileNorm(int sx,int addr,int pal)
{
unsigned char *pd = HighCol+sx;
unsigned int pack=0; unsigned int t=0;
pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
if (pack)
{
t=pack&0x0000f000; if (t) pd[0]=(unsigned char)(pal|(t>>12));
t=pack&0x00000f00; if (t) pd[1]=(unsigned char)(pal|(t>> 8));
t=pack&0x000000f0; if (t) pd[2]=(unsigned char)(pal|(t>> 4));
t=pack&0x0000000f; if (t) pd[3]=(unsigned char)(pal|(t ));
t=pack&0xf0000000; if (t) pd[4]=(unsigned char)(pal|(t>>28));
t=pack&0x0f000000; if (t) pd[5]=(unsigned char)(pal|(t>>24));
t=pack&0x00f00000; if (t) pd[6]=(unsigned char)(pal|(t>>20));
t=pack&0x000f0000; if (t) pd[7]=(unsigned char)(pal|(t>>16));
return 0;
}
return 1; // Tile blank
}
static int TileFlip(int sx,int addr,int pal)
{
unsigned char *pd = HighCol+sx;
unsigned int pack=0; unsigned int t=0;
pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
if (pack)
{
t=pack&0x000f0000; if (t) pd[0]=(unsigned char)(pal|(t>>16));
t=pack&0x00f00000; if (t) pd[1]=(unsigned char)(pal|(t>>20));
t=pack&0x0f000000; if (t) pd[2]=(unsigned char)(pal|(t>>24));
t=pack&0xf0000000; if (t) pd[3]=(unsigned char)(pal|(t>>28));
t=pack&0x0000000f; if (t) pd[4]=(unsigned char)(pal|(t ));
t=pack&0x000000f0; if (t) pd[5]=(unsigned char)(pal|(t>> 4));
t=pack&0x00000f00; if (t) pd[6]=(unsigned char)(pal|(t>> 8));
t=pack&0x0000f000; if (t) pd[7]=(unsigned char)(pal|(t>>12));
return 0;
}
return 1; // Tile blank
}
// tile renderers for hacky operator sprite support
#define sh_pix(x) \
if(!t); \
else if(t==0xe) pd[x]=(unsigned char)((pd[x]&0x3f)|0x80); /* hilight */ \
else if(t==0xf) pd[x]=(unsigned char)((pd[x]&0x3f)|0xc0); /* shadow */ \
else pd[x]=(unsigned char)(pal|t);
static int TileNormSH(int sx,int addr,int pal)
{
unsigned int pack=0; unsigned int t=0;
unsigned char *pd = HighCol+sx;
pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
if (pack)
{
t=(pack&0x0000f000)>>12; sh_pix(0);
t=(pack&0x00000f00)>> 8; sh_pix(1);
t=(pack&0x000000f0)>> 4; sh_pix(2);
t=(pack&0x0000000f) ; sh_pix(3);
t=(pack&0xf0000000)>>28; sh_pix(4);
t=(pack&0x0f000000)>>24; sh_pix(5);
t=(pack&0x00f00000)>>20; sh_pix(6);
t=(pack&0x000f0000)>>16; sh_pix(7);
return 0;
}
return 1; // Tile blank
}
static int TileFlipSH(int sx,int addr,int pal)
{
unsigned int pack=0; unsigned int t=0;
unsigned char *pd = HighCol+sx;
pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
if (pack)
{
t=(pack&0x000f0000)>>16; sh_pix(0);
t=(pack&0x00f00000)>>20; sh_pix(1);
t=(pack&0x0f000000)>>24; sh_pix(2);
t=(pack&0xf0000000)>>28; sh_pix(3);
t=(pack&0x0000000f) ; sh_pix(4);
t=(pack&0x000000f0)>> 4; sh_pix(5);
t=(pack&0x00000f00)>> 8; sh_pix(6);
t=(pack&0x0000f000)>>12; sh_pix(7);
return 0;
}
return 1; // Tile blank
}
// --------------------------------------------
static void DrawStrip(struct TileStrip *ts, int sh)
{
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&7)<<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 | (dx<<16) | (ty<<25);
if(code&0x1000) cval^=7<<26;
*ts->hc++ = cval; // cache it
continue;
}
continue;
if (code!=oldcode) {
oldcode = code;
// Get tile address/2:
addr=(code&0x7ff)<<4;
addr+=ty;
if (code&0x1000) addr^=0xe; // Y-flip
// pal=Pico.cram+((code>>9)&0x30);
pal=((code>>9)&0x30)|(sh<<6);
}
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;
}
static void DrawStripVSRam(struct TileStrip *ts, int plane)
{
int tilex=0,dx=0,ty=0,code=0,addr=0,cell=0,nametabadd=0;
int oldcode=-1,blank=-1; // The tile we know is blank
int pal=0,scan=Scanline;
// Draw tiles across screen:
tilex=(-ts->hscroll)>>3;
dx=((ts->hscroll-1)&7)+1;
if(dx != 8) {
int vscroll, line;
cell--; // have hscroll, start with negative cell
// also calculate intial VS stuff
vscroll=Pico.vsram[plane];
// Find the line in the name table
line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..
nametabadd=(line>>3)<<(ts->line>>24); // .. and shift[width]
ty=(line&7)<<1; // Y-Offset into tile
}
for (; cell < ts->cells; dx+=8,tilex++,cell++)
{
int zero=0;
if((cell&1)==0) {
int line,vscroll;
vscroll=Pico.vsram[plane+(cell&~1)];
// Find the line in the name table
line=(vscroll+scan)&ts->line&0xffff; // ts->line is really ymask ..
nametabadd=(line>>3)<<(ts->line>>24); // .. and shift[width]
ty=(line&7)<<1; // Y-Offset into tile
}
code=Pico.vram[ts->nametab+nametabadd+(tilex&ts->xmask)];
if (code==blank) continue;
if (code>>15) { // high priority tile
int cval = code | (dx<<16) | (ty<<25);
if(code&0x1000) cval^=7<<26;
*ts->hc++ = cval; // cache it
continue;
}
if (code!=oldcode) {
oldcode = code;
// Get tile address/2:
addr=(code&0x7ff)<<4;
if (code&0x1000) addr+=14-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;
}
static void DrawStripInterlace(struct TileStrip *ts)
{
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;
}
// --------------------------------------------
void DrawLayer(int plane, int *hcache, int maxcells, int sh)
{
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==0) ts.nametab=(pvid->reg[2]&0x38)<< 9; // A
else ts.nametab=(pvid->reg[4]&0x07)<<12; // B
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; // 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]; // 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);
} else {
vscroll=Pico.vsram[plane]; // 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, sh);
}
}
// --------------------------------------------
// tstart & tend are tile pair numbers
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;
}
// --------------------------------------------
void DrawTilesFromCache(int *hc, int sh)
{
int code, addr, zero, dx;
int pal;
short blank=-1; // The tile we know is blank
// *ts->hc++ = code | (dx<<16) | (ty<<25); // cache it
while((code=*hc++)) {
if(!sh && (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;
if(sh) {
unsigned char *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 (code&0x0800) zero=TileFlip(dx,addr,pal);
else zero=TileNorm(dx,addr,pal);
if(zero) blank=(short)code;
}
}
// --------------------------------------------
// 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
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);
}
}
}
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);
}
}
}
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);
}
// --------------------------------------------
extern unsigned short HighPal[0x100];
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]];
}
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]];
}
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