1 files changed, 16 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/sis/sis_fog.c b/src/mesa/drivers/dri/sis/sis_fog.c
index da36b3d795..fe9a3c95d6 100644
--- a/src/mesa/drivers/dri/sis/sis_fog.c
+++ b/src/mesa/drivers/dri/sis/sis_fog.c
@@ -53,6 +53,22 @@ sisDDFogfv( GLcontext *ctx, GLenum pname, const GLfloat *params )
 
    switch (pname)
    {
+   case GL_FOG_COORDINATE_SOURCE_EXT:
+      current->hwFog &= ~MASK_FogMode;
+      switch (ctx->Fog.FogCoordinateSource)
+      {
+      case GL_FOG_COORDINATE_EXT:
+         current->hwFog &= ~MASK_FogZLookup;
+         break;
+      case GL_FRAGMENT_DEPTH_EXT:
+         current->hwFog |= MASK_FogZLookup;
+         break;
+      }
+      if (current->hwFog != prev->hwFog) {
+         prev->hwFog = current->hwFog;
+         smesa->GlobalFlag |= GFLAG_FOGSETTING;
+      }
+      break;
    case GL_FOG_MODE:
       current->hwFog &= ~MASK_FogMode;
       switch (ctx->Fog.Mode)