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picodrive/Pico/Draw.c
notaz ca482e5de8 UIQ3 update, some makefile unification, rm old configs, stuff 
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@569 be3aeb3a-fb24-0410-a615-afba39da0efa
2008-08-21 10:45:54 +00:00

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// This is part of Pico Library
// (c) Copyright 2004 Dave, All rights reserved.
// (c) Copyright 2006-2008 notaz, All rights reserved.
// Free for non-commercial use.
// For commercial use, separate licencing terms must be obtained.
/*
* The renderer has 4 modes now:
* - normal
* - shadow/hilight (s/h)
* - "sonic mode" for midline palette changes
* - accurate sprites (AS)
*
* AS and s/h both use upper bits for both priority and shadow/hilight flags.
* "sonic mode" is autodetected, shadow/hilight is enabled by emulated game.
* AS is enabled by user and takes priority over "sonic mode".
*/
#include "PicoInt.h"
int (*PicoScanBegin)(unsigned int num) = NULL;
int (*PicoScanEnd) (unsigned int num) = NULL;
#if OVERRIDE_HIGHCOL
static unsigned char DefHighCol[8+320+8];
unsigned char *HighCol=DefHighCol;
#else
unsigned char HighCol[8+320+8];
#endif
unsigned short DefOutBuff[320*2];
void *DrawLineDest=DefOutBuff; // pointer to dest buffer where to draw this line to
static int HighCacheA[41+1]; // caches for high layers
static int HighCacheB[41+1];
int HighPreSpr[80*2+1]; // slightly preprocessed sprites
#define SPRL_HAVE_HI 0x80 // have hi priority sprites
#define SPRL_HAVE_LO 0x40 // *lo*
#define SPRL_MAY_HAVE_OP 0x20 // may have operator sprites on the line
#define SPRL_LO_ABOVE_HI 0x10 // low priority sprites may be on top of hi
unsigned char HighLnSpr[240][3 + MAX_LINE_SPRITES]; // sprite_count, ^flags, tile_count, [spritep]...
int rendstatus = 0;
int DrawScanline = 0;
int PicoDrawMask = -1;
static int skip_next_line=0;
//unsigned short ppt[] = { 0x0f11, 0x0ff1, 0x01f1, 0x011f, 0x01ff, 0x0f1f, 0x0f0e, 0x0e7c };
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)
};
// stuff available in asm:
#ifdef _ASM_DRAW_C
void DrawWindow(int tstart, int tend, int prio, int sh);
void BackFill(int reg7, int sh);
void DrawAllSprites(unsigned char *sprited, int prio, int sh);
void DrawTilesFromCache(int *hc, int sh, int rlim);
void DrawSpritesSHi(unsigned char *sprited);
void DrawLayer(int plane_sh, int *hcache, int cellskip, int maxcells);
void FinalizeLineBGR444(int sh);
void FinalizeLineRGB555(int sh);
void *blockcpy(void *dst, const void *src, size_t n);
void blockcpy_or(void *dst, void *src, size_t n, int pat);
#else
// utility
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);
}
#define blockcpy memcpy
#endif
#define TileNormMaker(funcname,pix_func) \
static int funcname(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)>>12; pix_func(0); \
t=(pack&0x00000f00)>> 8; pix_func(1); \
t=(pack&0x000000f0)>> 4; pix_func(2); \
t=(pack&0x0000000f) ; pix_func(3); \
t=(pack&0xf0000000)>>28; pix_func(4); \
t=(pack&0x0f000000)>>24; pix_func(5); \
t=(pack&0x00f00000)>>20; pix_func(6); \
t=(pack&0x000f0000)>>16; pix_func(7); \
return 0; \
} \
\
return 1; /* Tile blank */ \
}
#define TileFlipMaker(funcname,pix_func) \
static int funcname(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)>>16; pix_func(0); \
t=(pack&0x00f00000)>>20; pix_func(1); \
t=(pack&0x0f000000)>>24; pix_func(2); \
t=(pack&0xf0000000)>>28; pix_func(3); \
t=(pack&0x0000000f) ; pix_func(4); \
t=(pack&0x000000f0)>> 4; pix_func(5); \
t=(pack&0x00000f00)>> 8; pix_func(6); \
t=(pack&0x0000f000)>>12; pix_func(7); \
return 0; \
} \
\
return 1; /* Tile blank */ \
}
#ifdef _ASM_DRAW_C_AMIPS
int TileNorm(int sx,int addr,int pal);
int TileFlip(int sx,int addr,int pal);
#else
#define pix_just_write(x) \
if (t) pd[x]=pal|t
TileNormMaker(TileNorm,pix_just_write)
TileFlipMaker(TileFlip,pix_just_write)
#endif
#ifndef _ASM_DRAW_C
// draw a sprite pixel, process operator colors
#define pix_sh(x) \
if (!t); \
else if (t==0xe) pd[x]=(pd[x]&0x3f)|0x80; /* hilight */ \
else if (t==0xf) pd[x]= pd[x] |0xc0; /* shadow */ \
else pd[x]=pal|t
TileNormMaker(TileNormSH, pix_sh)
TileFlipMaker(TileFlipSH, pix_sh)
// draw a sprite pixel ignoring operator colors
#define pix_sh_noop(x) \
if (t && t < 0xe) \
pd[x]=pal|t
TileNormMaker(TileNormSH_noop, pix_sh_noop)
TileFlipMaker(TileFlipSH_noop, pix_sh_noop)
// process operator pixels only, apply only on low pri tiles
#define pix_sh_onlyop(x) \
if (t==0xe && (pd[x]&0x40)) pd[x]=(pd[x]&0x3f)|0x80; /* hilight */ \
else if (t==0xf && (pd[x]&0x40)) pd[x]= pd[x] |0xc0; /* shadow */
TileNormMaker(TileNormSH_onlyop_lp, pix_sh_onlyop)
TileFlipMaker(TileFlipSH_onlyop_lp, pix_sh_onlyop)
#endif
// draw a sprite pixel (AS)
#define pix_as(x) \
if (t && !(pd[x]&0x80)) pd[x]=pal|t
TileNormMaker(TileNormAS, pix_as)
TileFlipMaker(TileFlipAS, pix_as)
// draw a sprite pixel, skip operator colors (AS)
#define pix_sh_as_noop(x) \
if (t && t < 0xe && !(pd[x]&0x80)) pd[x]=pal|t
TileNormMaker(TileNormAS_noop, pix_sh_as_noop)
TileFlipMaker(TileFlipAS_noop, pix_sh_as_noop)
// mark pixel as sprite pixel (AS)
#define pix_sh_as_onlymark(x) \
if (t) pd[x]|=0x80
TileNormMaker(TileNormAS_onlymark, pix_sh_as_onlymark)
TileFlipMaker(TileFlipAS_onlymark, pix_sh_as_onlymark)
// --------------------------------------------
#ifndef _ASM_DRAW_C
static void DrawStrip(struct TileStrip *ts, int plane_sh, int cellskip)
{
int tilex,dx,ty,code=0,addr=0,cells;
int oldcode=-1,blank=-1; // The tile we know is blank
int pal=0,sh;
// Draw tiles across screen:
sh=(plane_sh<<5)&0x40;
tilex=((-ts->hscroll)>>3)+cellskip;
ty=(ts->line&7)<<1; // Y-Offset into tile
dx=((ts->hscroll-1)&7)+1;
cells = ts->cells - cellskip;
if(dx != 8) cells++; // have hscroll, need to draw 1 cell more
dx+=cellskip<<3;
for (; cells > 0; 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;
}
if (code!=oldcode) {
oldcode = code;
// Get tile address/2:
addr=(code&0x7ff)<<4;
addr+=ty;
if (code&0x1000) addr^=0xe; // Y-flip
pal=((code>>9)&0x30)|sh;
}
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;
// if oldcode wasn't changed, it means all layer is hi priority
if (oldcode == -1) rendstatus |= PDRAW_PLANE_HI_PRIO;
}
// this is messy
void DrawStripVSRam(struct TileStrip *ts, int plane_sh, int cellskip)
{
int tilex,dx,code=0,addr=0,cell=0;
int oldcode=-1,blank=-1; // The tile we know is blank
int pal=0,scan=DrawScanline;
// Draw tiles across screen:
tilex=(-ts->hscroll)>>3;
dx=((ts->hscroll-1)&7)+1;
if(dx != 8) cell--; // have hscroll, start with negative cell
cell+=cellskip;
tilex+=cellskip;
dx+=cellskip<<3;
for (; cell < ts->cells; dx+=8,tilex++,cell++)
{
int zero=0,nametabadd,ty;
//if((cell&1)==0)
{
int line,vscroll;
vscroll=Pico.vsram[(plane_sh&1)+(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=((code>>9)&0x30)|((plane_sh<<5)&0x40);
}
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;
if (oldcode == -1) rendstatus |= PDRAW_PLANE_HI_PRIO;
}
#endif
#ifndef _ASM_DRAW_C
static
#endif
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;
}
// --------------------------------------------
#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+=DrawScanline<<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+(DrawScanline<<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+DrawScanline)&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,ty,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+=(DrawScanline>>3)<<6;
}
else
{
nametab=(pvid->reg[3]&0x3e)<<9; // 32-cell mode
nametab+=(DrawScanline>>3)<<5;
}
tilex=tstart<<1;
if (!(rendstatus & PDRAW_WND_DIFF_PRIO)) {
// 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;
}
tend<<=1;
ty=(DrawScanline&7)<<1; // Y-Offset into tile
// Draw tiles across screen:
if (!sh)
{
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 |= PDRAW_WND_DIFF_PRIO;
continue;
}
pal=((code>>9)&0x30);
// 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
}
}
else
{
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 |= PDRAW_WND_DIFF_PRIO;
continue;
}
pal=((code>>9)&0x30);
if (prio) {
int *zb = (int *)(HighCol+8+(tilex<<3));
*zb++ &= 0x3f3f3f3f;
*zb &= 0x3f3f3f3f;
} 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
}
}
}
// --------------------------------------------
static void DrawTilesFromCacheShPrep(void)
{
// 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.
int c = 320/4, *zb = (int *)(HighCol+8);
rendstatus |= PDRAW_SHHI_DONE;
while (c--)
{
*zb++ &= 0x3f3f3f3f;
}
}
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 & (PDRAW_SHHI_DONE|PDRAW_PLANE_HI_PRIO)))
{
if (!(rendstatus & PDRAW_SHHI_DONE))
DrawTilesFromCacheShPrep();
sh = 0;
}
if (!sh)
{
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;
}
}
else
{
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;
*zb++ &= 0x3f; *zb++ &= 0x3f; *zb++ &= 0x3f; *zb++ &= 0x3f;
*zb++ &= 0x3f; *zb++ &= 0x3f; *zb++ &= 0x3f; *zb++ &= 0x3f;
pal=((code>>9)&0x30);
if (rlim-dx < 0) goto last_cut_tile;
if (code&0x0800) TileFlip(dx,addr,pal);
else TileNorm(dx,addr,pal);
}
}
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 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=DrawScanline-sy; // Row of the sprite we are on
if (code&0x1000) row=(height<<3)-1-row; // Flip Y
tile=code + (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 &= 0x7ff; tile<<=4; tile+=(row&7)<<1; // Tile address
delta<<=4; // Delta of address
pal=(code>>9)&0x30;
pal|=sh<<6;
if (sh && (code&0x6000) == 0x6000) {
if(code&0x0800) fTileFunc=TileFlipSH_noop;
else fTileFunc=TileNormSH_noop;
} 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
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=(DrawScanline<<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 sh)
{
struct PicoVideo *pvid=&Pico.video;
int i,u,table,link=0,sline=DrawScanline<<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 >= 328) 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
// Index + 0 : hhhhvvvv ----hhvv yyyyyyyy yyyyyyyy // v, h: vert./horiz. size
// Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
static void DrawSpritesSHi(unsigned char *sprited)
{
int (*fTileFunc)(int sx,int addr,int pal);
unsigned char *p;
int cnt;
cnt = sprited[0] & 0x7f;
if (cnt == 0) return;
p = &sprited[3];
// Go through sprites backwards:
for (cnt--; cnt >= 0; cnt--)
{
int *sprite, code, pal, tile, sx, sy;
int offs, delta, width, height, row;
offs = (p[cnt] & 0x7f) * 2;
sprite = HighPreSpr + offs;
code = sprite[1];
pal = (code>>9)&0x30;
if (pal == 0x30)
{
if (code & 0x8000) // hi priority
{
if (code&0x800) fTileFunc=TileFlipSH;
else fTileFunc=TileNormSH;
} else {
if (code&0x800) fTileFunc=TileFlipSH_onlyop_lp;
else fTileFunc=TileNormSH_onlyop_lp;
}
} else {
if (!(code & 0x8000)) continue; // non-operator low sprite, already drawn
if (code&0x800) fTileFunc=TileFlip;
else fTileFunc=TileNorm;
}
// parse remaining sprite data
sy=sprite[0];
sx=code>>16; // X
width=sy>>28;
height=(sy>>24)&7; // Width and height in tiles
sy=(sy<<16)>>16; // Y
row=DrawScanline-sy; // Row of the sprite we are on
if (code&0x1000) row=(height<<3)-1-row; // Flip Y
tile=code + (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 &= 0x7ff; tile<<=4; tile+=(row&7)<<1; // Tile address
delta<<=4; // Delta of address
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
static void DrawSpritesHiAS(unsigned char *sprited, int sh)
{
int (*fTileFunc)(int sx,int addr,int pal);
unsigned char *p;
int entry, cnt, sh_cnt = 0;
cnt = sprited[0] & 0x7f;
if (cnt == 0) return;
p = &sprited[3];
// Go through sprites:
for (entry = 0; entry < cnt; entry++)
{
int *sprite, code, pal, tile, sx, sy;
int offs, delta, width, height, row;
offs = (p[entry] & 0x7f) * 2;
sprite = HighPreSpr + offs;
code = sprite[1];
pal = (code>>9)&0x30;
if (code & 0x8000) // hi priority
{
if (sh && pal == 0x30)
{
if (code&0x800) fTileFunc=TileFlipAS_noop;
else fTileFunc=TileNormAS_noop;
} else {
if (code&0x800) fTileFunc=TileFlipAS;
else fTileFunc=TileNormAS;
}
} else {
if (code&0x800) fTileFunc=TileFlipAS_onlymark;
else fTileFunc=TileNormAS_onlymark;
}
if (sh && pal == 0x30)
p[sh_cnt++] = offs / 2; // re-save for sh/hi pass
// parse remaining sprite data
sy=sprite[0];
sx=code>>16; // X
width=sy>>28;
height=(sy>>24)&7; // Width and height in tiles
sy=(sy<<16)>>16; // Y
row=DrawScanline-sy; // Row of the sprite we are on
if (code&0x1000) row=(height<<3)-1-row; // Flip Y
tile=code + (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 &= 0x7ff; tile<<=4; tile+=(row&7)<<1; // Tile address
delta<<=4; // Delta of address
pal |= 0x80;
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);
}
}
if (!sh || !(sprited[1]&SPRL_MAY_HAVE_OP)) return;
/* nasty 1: remove 'sprite' flags */
{
int c = 320/4, *zb = (int *)(HighCol+8);
while (c--)
{
*zb++ &= 0x7f7f7f7f;
}
}
/* nasty 2: sh operator pass */
sprited[0] = sh_cnt;
DrawSpritesSHi(sprited);
}
// Index + 0 : ----hhvv -lllllll -------y yyyyyyyy
// Index + 4 : -------x xxxxxxxx pccvhnnn nnnnnnnn
// v
// Index + 0 : hhhhvvvv ----hhvv yyyyyyyy yyyyyyyy // v, h: vert./horiz. size
// Index + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
void PrepareSprites(int full)
{
struct PicoVideo *pvid=&Pico.video;
int u,link=0,sh;
int table=0;
int *pd = HighPreSpr;
int max_lines = 224, max_sprites = 80, max_width = 328;
int max_line_sprites = 20; // 20 sprites, 40 tiles
if (!(Pico.video.reg[12]&1))
max_sprites = 64, max_line_sprites = 16, max_width = 264;
if (PicoOpt & POPT_DIS_SPRITE_LIM)
max_line_sprites = MAX_LINE_SPRITES;
if (pvid->reg[1]&8) max_lines = 240;
sh = Pico.video.reg[0xC]&8; // shadow/hilight?
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 < max_sprites && (pack = *pd); u++, pd+=2)
{
unsigned int *sprite;
int code2, sx, sy, height;
sprite=(unsigned int *)(Pico.vram+((table+(link<<2))&0x7ffc)); // Find sprite
// parse sprite info
code2 = sprite[1];
sx = (code2>>16)&0x1ff;
sx -= 0x78; // Get X coordinate + 8
sy = (pack << 16) >> 16;
height = (pack >> 24) & 0xf;
if (sy < max_lines && sy + (height<<3) > DrawScanline && // sprite onscreen (y)?
(sx > -24 || sx < max_width)) // onscreen x
{
int y = (sy >= DrawScanline) ? sy : DrawScanline;
int entry = ((pd - HighPreSpr) / 2) | ((code2>>8)&0x80);
for (; y < sy + (height<<3) && y < max_lines; y++)
{
int i, cnt;
cnt = HighLnSpr[y][0] & 0x7f;
if (cnt >= max_line_sprites) continue; // sprite limit?
for (i = 0; i < cnt; i++)
if (((HighLnSpr[y][3+i] ^ entry) & 0x7f) == 0) goto found;
// this sprite was previously missing
HighLnSpr[y][3+cnt] = entry;
HighLnSpr[y][0] = cnt + 1;
found:;
if (entry & 0x80)
HighLnSpr[y][1] |= SPRL_HAVE_HI;
else HighLnSpr[y][1] |= SPRL_HAVE_LO;
}
}
code2 &= ~0xfe000000;
code2 -= 0x00780000; // Get X coordinate + 8 in upper 16 bits
pd[1] = code2;
// Find next sprite
link=(sprite[0]>>16)&0x7f;
if (!link) break; // End of sprites
}
}
else
{
for (u = 0; u < max_lines; u++)
*((int *)&HighLnSpr[u][0]) = 0;
for (u = 0; u < max_sprites; u++)
{
unsigned int *sprite;
int code, code2, sx, sy, hv, height, width;
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;
width = (hv>>2)+1;
code2 = sprite[1];
sx = (code2>>16)&0x1ff;
sx -= 0x78; // Get X coordinate + 8
if (sy < max_lines && sy + (height<<3) > DrawScanline) // sprite onscreen (y)?
{
int entry, y, sx_min, onscr_x, maybe_op = 0;
sx_min = 8-(width<<3);
onscr_x = sx_min < sx && sx < max_width;
if (sh && (code2 & 0x6000) == 0x6000)
maybe_op = SPRL_MAY_HAVE_OP;
entry = ((pd - HighPreSpr) / 2) | ((code2>>8)&0x80);
y = (sy >= DrawScanline) ? sy : DrawScanline;
for (; y < sy + (height<<3) && y < max_lines; y++)
{
unsigned char *p = &HighLnSpr[y][0];
int cnt = p[0];
if (cnt >= max_line_sprites) continue; // sprite limit?
if (p[2] >= max_line_sprites*2) { // tile limit?
p[0] |= 0x80;
continue;
}
p[2] += width;
if (sx == -0x78) {
if (cnt > 0)
p[0] |= 0x80; // masked, no more sprites for this line
continue;
}
// must keep the first sprite even if it's offscreen, for masking
if (cnt > 0 && !onscr_x) continue; // offscreen x
p[3+cnt] = entry;
p[0] = cnt + 1;
p[1] |= (entry & 0x80) ? SPRL_HAVE_HI : SPRL_HAVE_LO;
p[1] |= maybe_op; // there might be op sprites on this line
if (cnt > 0 && (code2 & 0x8000) && !(p[3+cnt-1]&0x80))
p[1] |= SPRL_LO_ABOVE_HI;
}
}
*pd++ = (width<<28)|(height<<24)|(hv<<16)|((unsigned short)sy);
*pd++ = (sx<<16)|((unsigned short)code2);
// Find next sprite
link=(code>>16)&0x7f;
if (!link) break; // End of sprites
}
*pd = 0;
#if 0
for (u = 0; u < max_lines; u++)
{
int y;
printf("c%03i: %2i, %2i: ", u, HighLnSpr[u][0] & 0x7f, HighLnSpr[u][2]);
for (y = 0; y < HighLnSpr[u][0] & 0x7f; y++)
printf(" %i", HighLnSpr[u][y+3]);
printf("\n");
}
#endif
}
}
#ifndef _ASM_DRAW_C
static void DrawAllSprites(unsigned char *sprited, int prio, int sh)
{
int rs = rendstatus;
unsigned char *p;
int cnt;
if (rs & (PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES)) {
//elprintf(EL_STATUS, "PrepareSprites(%i)", (rs>>4)&1);
PrepareSprites(rs & PDRAW_DIRTY_SPRITES);
rendstatus = rs & ~(PDRAW_SPRITES_MOVED|PDRAW_DIRTY_SPRITES);
}
cnt = sprited[0] & 0x7f;
if (cnt == 0) return;
p = &sprited[3];
// Go through sprites backwards:
for (cnt--; cnt >= 0; cnt--)
{
int offs;
if ((p[cnt] >> 7) != prio) continue;
offs = (p[cnt]&0x7f) * 2;
DrawSprite(HighPreSpr + offs, sh);
}
}
// --------------------------------------------
static void BackFill(int reg7, int sh)
{
unsigned int back;
// Start with a blank scanline (background colour):
back=reg7&0x3f;
back|=sh<<6;
back|=back<<8;
back|=back<<16;
memset32((int *)(HighCol+8), back, 320/4);
}
#endif
// --------------------------------------------
unsigned short HighPal[0x100];
#ifndef _ASM_DRAW_C
void PicoDoHighPal555(int sh)
{
unsigned short *pal=HighPal;
int i, t;
Pico.m.dirtyPal = 0;
{
unsigned int *spal=(void *)Pico.cram;
unsigned int *dpal=(void *)HighPal;
for (i = 0x3f/2; i >= 0; i--)
#ifdef USE_BGR555
dpal[i] = ((spal[i]&0x000f000f)<< 1)|((spal[i]&0x00f000f0)<<3)|((spal[i]&0x0f000f00)<<4);
#else
dpal[i] = ((spal[i]&0x000f000f)<<12)|((spal[i]&0x00f000f0)<<3)|((spal[i]&0x0f000f00)>>7);
#endif
}
if (sh)
{
// 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;
}
}
}
static void FinalizeLineBGR444(int sh)
{
unsigned short *pd=DrawLineDest;
unsigned char *ps=HighCol+8;
unsigned short *pal=Pico.cram;
int len, i, t, mask=0xff;
if (Pico.video.reg[12]&1) {
len = 320;
} else {
if(!(PicoOpt&POPT_DIS_32C_BORDER)) 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;
}
}
if (!sh && (rendstatus & PDRAW_ACC_SPRITES))
mask=0x3f; // accurate sprites
for(i = 0; i < len; i++)
pd[i] = pal[ps[i] & mask];
}
static void FinalizeLineRGB555(int sh)
{
unsigned short *pd=DrawLineDest;
unsigned char *ps=HighCol+8;
unsigned short *pal=HighPal;
int len;
if (Pico.m.dirtyPal)
PicoDoHighPal555(sh);
if (Pico.video.reg[12]&1) {
len = 320;
} else {
if (!(PicoOpt&POPT_DIS_32C_BORDER)) pd+=32;
len = 256;
}
{
#ifndef PSP
int i, mask=0xff;
if (!sh && (rendstatus & PDRAW_ACC_SPRITES))
mask=0x3f; // accurate sprites, upper bits are priority stuff
for (i = 0; i < len; i++)
pd[i] = pal[ps[i] & mask];
#else
extern void amips_clut(unsigned short *dst, unsigned char *src, unsigned short *pal, int count);
extern void amips_clut_6bit(unsigned short *dst, unsigned char *src, unsigned short *pal, int count);
if (!sh && (rendstatus & PDRAW_ACC_SPRITES))
amips_clut_6bit(pd, ps, pal, len);
else amips_clut(pd, ps, pal, len);
#endif
}
}
#endif
static void FinalizeLine8bit(int sh)
{
unsigned char *pd=DrawLineDest;
int len, rs = rendstatus;
static int dirty_count;
if (!sh && !(rs & PDRAW_ACC_SPRITES) && Pico.m.dirtyPal == 1 && DrawScanline < 222)
{
// a hack for mid-frame palette changes
if (!(rs & PDRAW_SONIC_MODE))
dirty_count = 1;
else dirty_count++;
rs |= PDRAW_SONIC_MODE;
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&POPT_DIS_32C_BORDER)) pd+=32;
len = 256;
}
if (!sh && (rs & PDRAW_SONIC_MODE)) {
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 void DrawBlankedLine(void)
{
int sh=(Pico.video.reg[0xC]&8)>>3; // shadow/hilight?
if (PicoScanBegin != NULL)
PicoScanBegin(DrawScanline);
BackFill(Pico.video.reg[7], sh);
if (FinalizeLine != NULL)
FinalizeLine(sh);
if (PicoScanEnd != NULL)
PicoScanEnd(DrawScanline);
}
static int DrawDisplay(int sh)
{
unsigned char *sprited = &HighLnSpr[DrawScanline][0];
struct PicoVideo *pvid=&Pico.video;
int win=0,edge=0,hvwind=0;
int maxw,maxcells;
rendstatus &= ~(PDRAW_SHHI_DONE|PDRAW_PLANE_HI_PRIO);
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 (DrawScanline>=edge) hvwind=1; }
else { if (DrawScanline< 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;
}
}
/* - layer B low - */
if (PicoDrawMask & PDRAW_LAYERB_ON)
DrawLayer(1|(sh<<1), HighCacheB, 0, maxcells);
/* - layer A low - */
if (!(PicoDrawMask & PDRAW_LAYERA_ON));
else if (hvwind == 1)
DrawWindow(0, maxcells>>1, 0, sh);
else if (hvwind == 2) {
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);
/* - sprites low - */
if (!(PicoDrawMask & PDRAW_SPRITES_LOW_ON));
else if (rendstatus & PDRAW_INTERLACE)
DrawAllSpritesInterlace(0, sh);
else if (sprited[1] & SPRL_HAVE_LO)
DrawAllSprites(sprited, 0, sh);
/* - layer B hi - */
if ((PicoDrawMask & PDRAW_LAYERB_ON) && HighCacheB[0])
DrawTilesFromCache(HighCacheB, sh, maxw);
/* - layer A hi - */
if (!(PicoDrawMask & PDRAW_LAYERA_ON));
else if (hvwind == 1)
DrawWindow(0, maxcells>>1, 1, sh);
else if (hvwind == 2) {
if (HighCacheA[0]) DrawTilesFromCache(HighCacheA, sh, (win&0x80) ? edge<<4 : maxw);
DrawWindow((win&0x80) ? edge : 0, (win&0x80) ? maxcells>>1 : edge, 1, sh);
} else
if (HighCacheA[0]) DrawTilesFromCache(HighCacheA, sh, maxw);
/* - sprites hi - */
if (!(PicoDrawMask & PDRAW_SPRITES_HI_ON));
else if (rendstatus & PDRAW_INTERLACE)
DrawAllSpritesInterlace(1, sh);
// AS on and have both lo/hi sprites and lo before hi sprites?
else if ((sprited[1] & 0xd0) == 0xd0 && (rendstatus & PDRAW_ACC_SPRITES))
DrawSpritesHiAS(sprited, sh);
else if (sh && (sprited[1] & SPRL_MAY_HAVE_OP))
DrawSpritesSHi(sprited);
else if (sprited[1] & SPRL_HAVE_HI)
DrawAllSprites(sprited, 1, 0);
#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, DrawScanline, a, b);
}
#endif
return 0;
}
PICO_INTERNAL void PicoFrameStart(void)
{
// prepare to do this frame
rendstatus = 0;
if (PicoOpt & POPT_ACC_SPRITES)
rendstatus |= PDRAW_ACC_SPRITES;
if ((Pico.video.reg[12]&6) == 6)
rendstatus |= PDRAW_INTERLACE; // interlace mode
if (Pico.m.dirtyPal) Pico.m.dirtyPal = 2; // reset dirty if needed
DrawScanline=0;
PrepareSprites(1);
skip_next_line=0;
}
static void PicoLine(void)
{
int sh;
if (skip_next_line>0) { skip_next_line--; return; } // skip rendering lines
sh=(Pico.video.reg[0xC]&8)>>3; // shadow/hilight?
if (PicoScanBegin != NULL)
skip_next_line = PicoScanBegin(DrawScanline);
// Draw screen:
BackFill(Pico.video.reg[7], sh);
if (Pico.video.reg[1]&0x40)
DrawDisplay(sh);
if (FinalizeLine != NULL)
FinalizeLine(sh);
if (PicoScanEnd != NULL)
PicoScanEnd(DrawScanline);
}
void PicoDrawSync(int to, int blank_last_line)
{
for (; DrawScanline < to; DrawScanline++)
{
#if !CAN_HANDLE_240_LINES
if (DrawScanline >= 224) break;
#endif
PicoLine();
}
#if !CAN_HANDLE_240_LINES
if (DrawScanline >= 224) { DrawScanline = 240; return; }
#endif
// last line
if (DrawScanline <= to)
{
if (blank_last_line)
DrawBlankedLine();
else PicoLine();
DrawScanline++;
}
}
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;
}
#if OVERRIDE_HIGHCOL
if (which) HighCol=DefHighCol;
#endif
}
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