diff options
| -rw-r--r-- | src/mesa/pipe/softpipe/sp_tex_sample.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/src/mesa/pipe/softpipe/sp_tex_sample.c b/src/mesa/pipe/softpipe/sp_tex_sample.c index c5f4602d2b1..7add74e98a6 100644 --- a/src/mesa/pipe/softpipe/sp_tex_sample.c +++ b/src/mesa/pipe/softpipe/sp_tex_sample.c @@ -77,17 +77,10 @@ lerp_2d(float a, float b, /** - * Compute the remainder of a divided by b, but be careful with - * negative values so that REPEAT mode works right. + * If A is a signed integer, A % B doesn't give the right value for A < 0 + * (in terms of texture repeat). Just casting to unsigned fixes that. */ -static INLINE int -repeat_remainder(int a, int b) -{ - if (a >= 0) - return a % b; - else - return (a + 1) % b + b - 1; -} +#define REMAINDER(A, B) ((unsigned) (A) % (unsigned) (B)) /** @@ -106,7 +99,7 @@ nearest_texcoord(unsigned wrapMode, float s, unsigned size) /* s limited to [0,1) */ /* i limited to [0,size-1] */ i = ifloor(s * size); - i = repeat_remainder(i, size); + i = REMAINDER(i, size); return i; case PIPE_TEX_WRAP_CLAMP: /* s limited to [0,1] */ @@ -231,8 +224,8 @@ linear_texcoord(unsigned wrapMode, float s, unsigned size, switch (wrapMode) { case PIPE_TEX_WRAP_REPEAT: u = s * size - 0.5F; - *i0 = repeat_remainder(ifloor(u), size); - *i1 = repeat_remainder(*i0 + 1, size); + *i0 = REMAINDER(ifloor(u), size); + *i1 = REMAINDER(*i0 + 1, size); break; case PIPE_TEX_WRAP_CLAMP: if (s <= 0.0F) |