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* direct color textures. 

* texture wrap modes.
This commit is contained in:
StapleButter 2017-03-06 18:25:20 +01:00
parent 383093c5ff
commit fe31ec297c
1 changed files with 45 additions and 3 deletions
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48
GPU3D_Soft.cpp
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@ -58,9 +58,40 @@ void TextureLookup(u32 texparam, u32 texpal, s16 s, s16 t, u8* r, u8* g, u8* b)
s >>= 4;
t >>= 4;
// TODO: wraparound modes
s &= width-1;
t &= height-1;
// texture wrapping
// TODO: optimize this somehow
if (texparam & (1<<16))
{
if (texparam & (1<<18))
{
if (s & width) s = (width-1) - (s & (width-1));
else s = (s & (width-1));
}
else
s &= width-1;
}
else
{
if (s < 0) s = 0;
else if (s >= width) s = width-1;
}
if (texparam & (1<<17))
{
if (texparam & (1<<19))
{
if (t & height) t = (height-1) - (t & (height-1));
else t = (t & (height-1));
}
else
t &= height-1;
}
else
{
if (t < 0) t = 0;
else if (t >= height) t = height-1;
}
switch ((texparam >> 26) & 0x7)
{
@ -94,6 +125,17 @@ void TextureLookup(u32 texparam, u32 texpal, s16 s, s16 t, u8* r, u8* g, u8* b)
}
break;
case 7: // direct color
{
vramaddr += (((t * width) + s) << 1);
u16 color = GPU::ReadVRAM_Texture<u16>(vramaddr);
*r = (color << 1) & 0x3E; if (*r) *r++;
*g = (color >> 4) & 0x3E; if (*g) *g++;
*b = (color >> 9) & 0x3E; if (*b) *b++;
}
break;
case 5: // compressed
{
vramaddr += ((t & 0x3FC) * (width>>2)) + (s & 0x3FC);