diff options
Diffstat (limited to 'src/mesa/swrast/s_aaline.c')
| -rw-r--r-- | src/mesa/swrast/s_aaline.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/src/mesa/swrast/s_aaline.c b/src/mesa/swrast/s_aaline.c index deaae01f711..5d391a2ad37 100644 --- a/src/mesa/swrast/s_aaline.c +++ b/src/mesa/swrast/s_aaline.c @@ -1,4 +1,4 @@ -/* $Id: s_aaline.c,v 1.18 2003/02/27 23:37:53 brianp Exp $ */ +/* $Id: s_aaline.c,v 1.19 2003/02/28 15:08:49 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -180,12 +180,16 @@ solve_plane_recip(GLfloat x, GLfloat y, const GLfloat plane[4]) static INLINE GLchan solve_plane_chan(GLfloat x, GLfloat y, const GLfloat plane[4]) { - GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2] + 0.5F; - if (z < 0.0F) + const GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2]; +#if CHAN_TYPE == GL_FLOAT + return CLAMP(z, 0.0F, CHAN_MAXF); +#else + if (z < 0) return 0; - else if (z > CHAN_MAXF) - return (GLchan) CHAN_MAXF; - return (GLchan) z; + else if (z > CHAN_MAX) + return CHAN_MAX; + return (GLchan) IROUND_POS(z); +#endif } |