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mipmapped non-square textures no longer look terrible.

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git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@3298 fc73d0e0-1445-4013-8a0c-d673dee63da5
This commit is contained in:
Spoike 2009-07-18 11:06:28 +00:00
parent ccf1338d41
commit fdf09ce18b
1 changed files with 14 additions and 7 deletions
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21
engine/gl/gl_draw.c
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@ -2914,18 +2914,25 @@ void GL_MipMap (qbyte *in, int width, int height)
{ {
int i, j; int i, j;
qbyte *out; qbyte *out;
qbyte *inrow;
width <<=2; //with npot
int rowwidth = width*4; //rowwidth is the byte width of the input
inrow = in;
width >>= 1; //ensure its truncated, so don't merge with the *8
height >>= 1; height >>= 1;
out = in; out = in;
for (i=0 ; i<height ; i++, in+=width)
for (i=0 ; i<height ; i++, inrow+=rowwidth*2)
{ {
for (j=0 ; j<width ; j+=8, out+=4, in+=8) for (in = inrow, j=0 ; j<width ; j++, out+=4, in+=8)
{ {
out[0] = (in[0] + in[4] + in[width+0] + in[width+4])>>2; out[0] = (in[0] + in[4] + in[rowwidth+0] + in[rowwidth+4])>>2;
out[1] = (in[1] + in[5] + in[width+1] + in[width+5])>>2; out[1] = (in[1] + in[5] + in[rowwidth+1] + in[rowwidth+5])>>2;
out[2] = (in[2] + in[6] + in[width+2] + in[width+6])>>2; out[2] = (in[2] + in[6] + in[rowwidth+2] + in[rowwidth+6])>>2;
out[3] = (in[3] + in[7] + in[width+3] + in[width+7])>>2; out[3] = (in[3] + in[7] + in[rowwidth+3] + in[rowwidth+7])>>2;
} }
} }
} }