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bilinear filter in the right direction

This commit is contained in:
David Rose 2008-05-14 18:46:33 +00:00
parent fd1a56e232
commit 2ecdbffeca
1 changed files with 18 additions and 18 deletions
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36
panda/src/tinydisplay/zbuffer.cxx
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@ -368,12 +368,12 @@ PIXEL lookup_texture_bilinear(ZTextureLevel *texture_levels, int s, int t, unsig
int sf, tf;
int r, g, b, a;
p1 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s, t);
p2 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s + ZB_ST_FRAC_HIGH, t);
p1 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s - ZB_ST_FRAC_HIGH, t - ZB_ST_FRAC_HIGH);
p2 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s, t - ZB_ST_FRAC_HIGH);
sf = s & ZB_ST_FRAC_MASK;
p3 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s, t + ZB_ST_FRAC_HIGH);
p4 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s + ZB_ST_FRAC_HIGH, t + ZB_ST_FRAC_HIGH);
p3 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s - ZB_ST_FRAC_HIGH, t);
p4 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s, t);
tf = t & ZB_ST_FRAC_MASK;
r = BILINEAR_FILTER(PIXEL_R(p1), PIXEL_R(p2), PIXEL_R(p3), PIXEL_R(p4), sf, tf);
@ -420,12 +420,12 @@ PIXEL lookup_texture_mipmap_bilinear(ZTextureLevel *texture_levels, int s, int t
int sf, tf;
int r, g, b, a;
p1 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s, t);
p2 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s + ZB_ST_FRAC_HIGH, t);
p1 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s - ZB_ST_FRAC_HIGH, t - ZB_ST_FRAC_HIGH);
p2 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s, t - ZB_ST_FRAC_HIGH);
sf = s & ZB_ST_FRAC_MASK;
p3 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s, t + ZB_ST_FRAC_HIGH);
p4 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s + ZB_ST_FRAC_HIGH, t + ZB_ST_FRAC_HIGH);
p3 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s - ZB_ST_FRAC_HIGH, t);
p4 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, s, t);
tf = t & ZB_ST_FRAC_MASK;
r = BILINEAR_FILTER(PIXEL_R(p1), PIXEL_R(p2), PIXEL_R(p3), PIXEL_R(p4), sf, tf);
@ -450,13 +450,13 @@ PIXEL lookup_texture_mipmap_trilinear(ZTextureLevel *texture_levels, int s, int
PIXEL p1, p2, p3, p4;
int sf, tf;
int r, g, b, a;
p1 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl, tl);
p2 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl + ZB_ST_FRAC_HIGH, tl);
p1 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl - ZB_ST_FRAC_HIGH, tl - ZB_ST_FRAC_HIGH);
p2 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl, tl - ZB_ST_FRAC_HIGH);
sf = sl & ZB_ST_FRAC_MASK;
p3 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl, tl + ZB_ST_FRAC_HIGH);
p4 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl + ZB_ST_FRAC_HIGH, tl + ZB_ST_FRAC_HIGH);
p3 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl - ZB_ST_FRAC_HIGH, tl);
p4 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl, tl);
tf = tl & ZB_ST_FRAC_MASK;
r = BILINEAR_FILTER(PIXEL_R(p1), PIXEL_R(p2), PIXEL_R(p3), PIXEL_R(p4), sf, tf);
@ -474,13 +474,13 @@ PIXEL lookup_texture_mipmap_trilinear(ZTextureLevel *texture_levels, int s, int
PIXEL p1, p2, p3, p4;
int sf, tf;
int r, g, b, a;
p1 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl, tl);
p2 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl + ZB_ST_FRAC_HIGH, tl);
p1 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl - ZB_ST_FRAC_HIGH, tl - ZB_ST_FRAC_HIGH);
p2 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl, tl - ZB_ST_FRAC_HIGH);
sf = sl & ZB_ST_FRAC_MASK;
p3 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl, tl + ZB_ST_FRAC_HIGH);
p4 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl + ZB_ST_FRAC_HIGH, tl + ZB_ST_FRAC_HIGH);
p3 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl - ZB_ST_FRAC_HIGH, tl);
p4 = ZB_LOOKUP_TEXTURE_NEAREST(base_level, sl, tl);
tf = tl & ZB_ST_FRAC_MASK;
r = BILINEAR_FILTER(PIXEL_R(p1), PIXEL_R(p2), PIXEL_R(p3), PIXEL_R(p4), sf, tf);