diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2001-05-15 21:30:26 +0000 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2001-05-15 21:30:26 +0000 |
| commit | 5071b0812fc73bcba92e2b6fcbad2f53f063fc32 (patch) | |
| tree | d83905130a82d8f6dfc14668f96aa5768a8cb198 /src/mesa/swrast/s_pointtemp.h | |
| parent | a51f07d5a148705c1c118dece1630972753ca349 (diff) | |
Apply antialiasing coverage factor to alpha after texture application,
not before.
Diffstat (limited to 'src/mesa/swrast/s_pointtemp.h')
| -rw-r--r-- | src/mesa/swrast/s_pointtemp.h | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/src/mesa/swrast/s_pointtemp.h b/src/mesa/swrast/s_pointtemp.h index 7fe3351e66..9711238937 100644 --- a/src/mesa/swrast/s_pointtemp.h +++ b/src/mesa/swrast/s_pointtemp.h @@ -1,4 +1,4 @@ -/* $Id: s_pointtemp.h,v 1.6 2001/05/09 17:31:46 brianp Exp $ */ +/* $Id: s_pointtemp.h,v 1.7 2001/05/15 21:30:27 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -184,7 +184,7 @@ NAME ( GLcontext *ctx, const SWvertex *vert ) const GLfloat rmax = radius + 0.7071F; const GLfloat rmin2 = MAX2(0.0, rmin * rmin); const GLfloat rmax2 = rmax * rmax; - const GLfloat cscale = 256.0F / (rmax2 - rmin2); + const GLfloat cscale = 1.0F / (rmax2 - rmin2); const GLint xmin = (GLint) (vert->win[0] - radius); const GLint xmax = (GLint) (vert->win[0] + radius); const GLint ymin = (GLint) (vert->win[1] - radius); @@ -225,15 +225,14 @@ NAME ( GLcontext *ctx, const SWvertex *vert ) alpha = vert->color[3]; #endif if (dist2 >= rmin2) { - GLint coverage = (GLint) (256.0F - (dist2 - rmin2) * cscale); -#if FLAGS & RGBA - /* coverage is in [0,256] */ - alpha = (alpha * coverage) >> 8; -#else - /* 4 fractional index bits */ - index = (index & ~0xf) | (coverage >> 4); /* XXX verify */ -#endif + /* compute partial coverage */ + PB_COVERAGE(PB, 1.0F - (dist2 - rmin2) * cscale); } + else { + /* full coverage */ + PB_COVERAGE(PB, 1.0F); + } + #endif /* SMOOTH */ #if ((FLAGS & (ATTENUATE | RGBA)) == (ATTENUATE | RGBA)) @@ -273,6 +272,11 @@ NAME ( GLcontext *ctx, const SWvertex *vert ) #endif } } + +#if FLAGS & SMOOTH + PB->haveCoverage = GL_TRUE; +#endif + PB_CHECK_FLUSH(ctx,PB); } |