From 5fff0c135da68f58914b926cb73c21d9a6620045 Mon Sep 17 00:00:00 2001
From: Keith Whitwell <keith@tungstengraphics.com>
Date: Fri, 7 Jan 2005 15:27:41 +0000
Subject: [PATCH] Cope with the possibility that incoming vectors may have
 count < VB->Count.

Remove code to deal with the (should-be) impossible situation of null
input vectors.
---
 src/mesa/tnl/t_vb_texgen.c | 89 +++++++++++++---------------------------------
 1 file changed, 24 insertions(+), 65 deletions(-)

diff --git a/src/mesa/tnl/t_vb_texgen.c b/src/mesa/tnl/t_vb_texgen.c
index e9719b3..a2912cf 100644
--- a/src/mesa/tnl/t_vb_texgen.c
+++ b/src/mesa/tnl/t_vb_texgen.c
@@ -65,7 +65,6 @@ struct texgen_stage_data {
    /* Per-texunit derived state.
     */
    GLuint TexgenSize[MAX_TEXTURE_COORD_UNITS];
-   GLuint TexgenHoles[MAX_TEXTURE_COORD_UNITS];
    texgen_func TexgenFunc[MAX_TEXTURE_COORD_UNITS];
 
    /* Temporary values used in texgen.
@@ -247,6 +246,7 @@ static build_f_func build_f_tab[5] = {
 };
 
 
+
 /* Special case texgen functions.
  */
 static void texgen_reflection_map_nv( GLcontext *ctx,
@@ -262,19 +262,11 @@ static void texgen_reflection_map_nv( GLcontext *ctx,
 				  VB->NormalPtr,
 				  VB->EyePtr );
 
-   if (in) {
-      out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_3;
-      out->count = in->count;
-      out->size = MAX2(in->size, 3);
-      if (in->size == 4)
-	 _mesa_copy_tab[0x8]( out, in );
-   }
-   else {
-      out->flags |= VEC_SIZE_3;
-      out->size = 3;
-      out->count = in->count;
-   }
-
+   out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_3;
+   out->count = VB->Count;
+   out->size = MAX2(in->size, 3);
+   if (in->size == 4) 
+      _mesa_copy_tab[0x8]( out, in );
 }
 
 
@@ -299,18 +291,11 @@ static void texgen_normal_map_nv( GLcontext *ctx,
    }
 
 
-   if (in) {
-      out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_3;
-      out->count = in->count;
-      out->size = MAX2(in->size, 3);
-      if (in->size == 4)
-	 _mesa_copy_tab[0x8]( out, in );
-   }
-   else {
-      out->flags |= VEC_SIZE_3;
-      out->size = 3;
-      out->count = in->count;
-   }
+   out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_3;
+   out->count = count;
+   out->size = MAX2(in->size, 3);
+   if (in->size == 4) 
+      _mesa_copy_tab[0x8]( out, in );
 }
 
 
@@ -332,22 +317,17 @@ static void texgen_sphere_map( GLcontext *ctx,
 				    VB->NormalPtr,
 				    VB->EyePtr );
 
+   out->size = MAX2(in->size,2);
+
    for (i=0;i<count;i++) {
       texcoord[i][0] = f[i][0] * m[i] + 0.5F;
       texcoord[i][1] = f[i][1] * m[i] + 0.5F;
    }
 
-   if (in) {
-      out->size = MAX2(in->size,2);
-      out->count = in->count;
-      out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_2;
-      if (in->size > 2)
-	 _mesa_copy_tab[all_bits[in->size] & ~0x3]( out, in );
-   } else {
-      out->size = 2;
-      out->flags |= VEC_SIZE_2;
-      out->count = in->count;
-   }
+   out->count = count;
+   out->flags |= (in->flags & VEC_SIZE_FLAGS) | VEC_SIZE_2;
+   if (in->size > 2)
+      _mesa_copy_tab[all_bits[in->size] & ~0x3]( out, in );
 }
 
 
@@ -368,7 +348,7 @@ static void texgen( GLcontext *ctx,
    const GLuint count = VB->Count;
    GLfloat (*texcoord)[4] = (GLfloat (*)[4])out->data;
    GLfloat (*f)[3] = store->tmp_f;
-   GLuint holes = 0;
+   GLuint copy;
 
    if (texUnit->_GenFlags & TEXGEN_NEED_M) {
       build_m_tab[eye->size]( store->tmp_f, store->tmp_m, normal, eye );
@@ -376,34 +356,14 @@ static void texgen( GLcontext *ctx,
       build_f_tab[eye->size]( (GLfloat *)store->tmp_f, 3, normal, eye );
    }
 
-   if (!in) {
-      ASSERT(0);
-      in = out;
-      in->count = VB->Count;
-
-      out->size = store->TexgenSize[unit];
-      out->flags |= texUnit->TexGenEnabled;
-      out->count = VB->Count;
-      holes = store->TexgenHoles[unit];
-   }
-   else {
-      GLuint copy = (all_bits[in->size] & ~texUnit->TexGenEnabled);
-      if (copy)
-	 _mesa_copy_tab[copy]( out, in );
-
-      out->size = MAX2(in->size, store->TexgenSize[unit]);
-      out->flags |= (in->flags & VEC_SIZE_FLAGS) | texUnit->TexGenEnabled;
-      out->count = in->count;
 
-      holes = ~all_bits[in->size] & store->TexgenHoles[unit];
-   }
+   out->size = MAX2(in->size, store->TexgenSize[unit]);
+   out->flags |= (in->flags & VEC_SIZE_FLAGS) | texUnit->TexGenEnabled;
+   out->count = count;
 
-   if (holes) {
-      if (holes & VEC_DIRTY_3) _mesa_vector4f_clean_elem(out, count, 3);
-      if (holes & VEC_DIRTY_2) _mesa_vector4f_clean_elem(out, count, 2);
-      if (holes & VEC_DIRTY_1) _mesa_vector4f_clean_elem(out, count, 1);
-      if (holes & VEC_DIRTY_0) _mesa_vector4f_clean_elem(out, count, 0);
-   }
+   copy = (all_bits[in->size] & ~texUnit->TexGenEnabled);
+   if (copy)
+      _mesa_copy_tab[copy]( out, in );
 
    if (texUnit->TexGenEnabled & S_BIT) {
       GLuint i;
@@ -564,7 +524,6 @@ static GLboolean run_validate_texgen_stage( GLcontext *ctx,
 	    sz = 1;
 
 	 store->TexgenSize[i] = sz;
-	 store->TexgenHoles[i] = (all_bits[sz] & ~texUnit->TexGenEnabled);
 	 store->TexgenFunc[i] = texgen; /* general solution */
 
          /* look for special texgen cases */
-- 
2.7.4