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improve sh/hi levels

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.. but reduce brigtness ~6% due to different rgb565 expansion


git-svn-id: file:///home/notaz/opt/svn/PicoDrive@890 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2010-09-09 21:10:28 +00:00
parent 7c18e34a74
commit a39d8ba585
2 changed files with 48 additions and 58 deletions
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25
pico/draw.c
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@ -19,7 +19,7 @@
*
* since renderer always draws line in 8bit mode, there are 2 spare bits:
* b \ mode: s/h as sonic
* 00 normal - -
* 00 normal - pal index
* 01 shadow - pal index
* 10 hilight+op spr spr pal index
* 11 shadow +op spr - pal index
@ -1162,34 +1162,37 @@ unsigned short HighPal[0x100];
void PicoDoHighPal555(int sh)
{
unsigned int *spal, *dpal;
unsigned short *pal=HighPal;
int i, t;
unsigned int t, i;
Pico.m.dirtyPal = 0;
spal = (void *)Pico.cram;
dpal = (void *)HighPal;
for (i = 0; i < 0x40; i++) {
unsigned int t = spal[i];
for (i = 0; i < 0x40 / 2; i++) {
t = spal[i];
#ifdef USE_BGR555
t = ((t & 0x000e000e)<< 1) | ((t & 0x00e000e0)<<3) | ((t & 0x0e000e00)<<4);
#else
t = ((t & 0x000e000e)<<12) | ((t & 0x00e000e0)<<3) | ((t & 0x0e000e00)>>7);
#endif
t |= (t >> 3) & 0x18e318e3;
// treat it like it was 4-bit per channel, since in s/h mode it somewhat is that.
// otherwise intensity difference between this and s/h will be wrong
t |= (t >> 4) & 0x08610861; // 0x18e318e3
dpal[i] = t;
}
// norm: xxx0, sh: 0xxx, hi: 0xxx + 7
if (sh)
{
// shadowed pixels
for (i = 0x3f; i >= 0; i--)
pal[0x40|i] = pal[0xc0|i] = (unsigned short)((pal[i]>>1)&0x738e);
for (i = 0; i < 0x40 / 2; i++)
dpal[0x40/2 | i] = dpal[0xc0/2 | i] = (dpal[i] >> 1) & 0x738e738e;
// 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 < 0x40 / 2; i++) {
t = ((dpal[i] >> 1) & 0x738e738e) + 0x738e738e; // 0x7bef7bef;
t |= (t >> 4) & 0x08610861;
dpal[0x80/2 | i] = t;
}
}
}