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From: Zou Nan hai <nanhai.zou@intel.com>
Date: Fri, 2 Feb 2007 01:35:17 +0000 (+0800)
Subject: Fix fd.o #9686, when fall into vertex fog,
X-Git-Url: http://gitweb.freedesktop.org/?p=mesa/mesa.git;a=commitdiff;h=2dfb3a217f730d6783fb2ac8b73248dc682f923c
Fix fd.o #9686, when fall into vertex fog,
fog factors are precomputed in t_vb_fog.c compute_fog_blend_factors,
which is incompatible with appended fragment fog code.
That will make GoogleEarth display abnormally.
always use pixel fog.
---
--- a/src/mesa/drivers/dri/i915/i915_state.c
+++ b/src/mesa/drivers/dri/i915/i915_state.c
@@ -611,10 +611,12 @@ void i915_update_fog( GLcontext *ctx )
i915->state.Ctx[I915_CTXREG_LIS5] &= ~S5_FOG_ENABLE;
}
- if (enabled) {
- _tnl_allow_vertex_fog( ctx, (i915->vertex_fog == I915_FOG_VERTEX) );
- _tnl_allow_pixel_fog( ctx, (i915->vertex_fog != I915_FOG_VERTEX) );
- }
+ /* always enbale pixel fog
+ * vertex fog use precaculted fog coord will conflict with appended
+ * fog program
+ */
+ _tnl_allow_vertex_fog( ctx, 0 );
+ _tnl_allow_pixel_fog( ctx, 1 );
}
static void i915Fogfv(GLcontext *ctx, GLenum pname, const GLfloat *param)
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