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psp readme, some adjustments

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@296 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-11-16 19:19:21 +00:00
parent b542be4686
commit 81fda4e8d8
7 changed files with 265 additions and 87 deletions
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153
Pico/Draw.c
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@ -535,22 +535,49 @@ static void DrawWindow(int tstart, int tend, int prio, int sh) // int *hcache
}
// Draw tiles across screen:
for (; tilex < tend; tilex++)
if (!sh)
{
int addr=0,zero=0;
int pal;
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;
code=Pico.vram[nametab+tilex];
if(code==blank) continue;
if((code>>15) != prio) {
rendstatus|=2;
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, tmp, *zb;
pal=((code>>9)&0x30);
code=Pico.vram[nametab+tilex];
if(code==blank) continue;
if((code>>15) != prio) {
rendstatus|=2;
continue;
}
if(sh) {
int tmp, *zb = (int *)(HighCol+8+(tilex<<3));
pal=((code>>9)&0x30);
zb = (int *)(HighCol+8+(tilex<<3));
if(prio) {
tmp = *zb;
if(!(tmp&0x00000080)) tmp&=~0x000000c0; if(!(tmp&0x00008000)) tmp&=~0x0000c000;
@ -562,24 +589,43 @@ static void DrawWindow(int tstart, int tend, int prio, int sh) // int *hcache
} 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
}
// 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 DrawTilesFromCacheShPrep(void)
{
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++;
}
}
}
static void DrawTilesFromCache(int *hc, int sh, int rlim)
{
int code, addr, dx;
@ -589,28 +635,31 @@ static void DrawTilesFromCache(int *hc, int sh, int rlim)
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++;
}
}
DrawTilesFromCacheShPrep();
sh = 0;
}
if (sh)
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;
@ -631,26 +680,6 @@ static void DrawTilesFromCache(int *hc, int sh, int rlim)
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: