fix #6072 (Keith Whitwell)

diff --git a/src/mesa/main/texenvprogram.c b/src/mesa/main/texenvprogram.c
index e526391..02ff833 100644 (file)
--- a/src/mesa/main/texenvprogram.c
+++ b/src/mesa/main/texenvprogram.c
@@ -928,9 +928,12 @@ static void load_texture( struct texenv_fragment_program *p, GLuint unit )
                          
       /* TODO: Use D0_MASK_XY where possible.
        */
-      p->src_texture[unit] = emit_texld( p, OPCODE_TXP,
-                                        tmp, WRITEMASK_XYZW, 
-                                        unit, dim, texcoord );
+      if (p->state->unit[unit].enabled) 
+        p->src_texture[unit] = emit_texld( p, OPCODE_TXP,
+                                           tmp, WRITEMASK_XYZW, 
+                                           unit, dim, texcoord );
+      else
+        p->src_texture[unit] = get_zero(p);
    }
 }
 
@@ -950,8 +953,6 @@ static GLboolean load_texenv_source( struct texenv_fragment_program *p,
    case SRC_TEXTURE5:
    case SRC_TEXTURE6:
    case SRC_TEXTURE7:       
-      if (!p->state->unit[src - SRC_TEXTURE0].enabled)
-        return GL_FALSE;
       load_texture(p, src - SRC_TEXTURE0);
       break;
       
@@ -970,12 +971,16 @@ static GLboolean
 load_texunit_sources( struct texenv_fragment_program *p, int unit )
 {
    struct state_key *key = p->state;
-   int i, nr = key->unit[unit].NumArgsRGB;
-   for (i = 0; i < nr; i++) {
-      if (!load_texenv_source( p, key->unit[unit].OptRGB[i].Source, unit) ||
-         !load_texenv_source( p, key->unit[unit].OptA[i].Source, unit ))
-        return GL_FALSE;
+   GLuint i;
+
+   for (i = 0; i < key->unit[unit].NumArgsRGB; i++) {
+      load_texenv_source( p, key->unit[unit].OptRGB[i].Source, unit);
+   }
+
+   for (i = 0; i < key->unit[unit].NumArgsA; i++) {
+      load_texenv_source( p, key->unit[unit].OptA[i].Source, unit );
    }
+
    return GL_TRUE;
 }
 
@@ -1028,8 +1033,8 @@ create_new_program(struct state_key *key, GLcontext *ctx,
        */
       for (unit = 0 ; unit < ctx->Const.MaxTextureUnits ; unit++)
         if (key->unit[unit].enabled) {
-           if (load_texunit_sources( &p, unit ))
-              p.last_tex_stage = unit;
+           load_texunit_sources( &p, unit );
+           p.last_tex_stage = unit;
         }
 
       /* Second pass - emit combine instructions to build final color: