diff options
Diffstat (limited to 'src/mesa/swrast/s_texfilter.c')
| -rw-r--r-- | src/mesa/swrast/s_texfilter.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/src/mesa/swrast/s_texfilter.c b/src/mesa/swrast/s_texfilter.c index c2a7512388..bb4e38623c 100644 --- a/src/mesa/swrast/s_texfilter.c +++ b/src/mesa/swrast/s_texfilter.c @@ -213,17 +213,10 @@ lerp_rgba_3d(GLchan result[4], GLfloat a, GLfloat b, GLfloat c, /** - * Compute the remainder of a divided by b, but be careful with - * negative values so that GL_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 GLint -repeat_remainder(GLint a, GLint b) -{ - if (a >= 0) - return a % b; - else - return (a + 1) % b + b - 1; -} +#define REMAINDER(A, B) ((unsigned) (A) % (unsigned) (B)) /** @@ -246,8 +239,8 @@ repeat_remainder(GLint a, GLint b) I1 = (I0 + 1) & (SIZE - 1); \ } \ else { \ - I0 = repeat_remainder(IFLOOR(U), SIZE); \ - I1 = repeat_remainder(I0 + 1, SIZE); \ + I0 = REMAINDER(IFLOOR(U), SIZE); \ + I1 = REMAINDER(I0 + 1, SIZE); \ } \ break; \ case GL_CLAMP_TO_EDGE: \ @@ -366,7 +359,7 @@ repeat_remainder(GLint a, GLint b) if (img->_IsPowerOfTwo) \ I &= (SIZE - 1); \ else \ - I = repeat_remainder(I, SIZE); \ + I = REMAINDER(I, SIZE); \ break; \ case GL_CLAMP_TO_EDGE: \ { \ |