fixed VB->IndexPtr==NULL bug (Richard Guenther)

1 files changed, 17 insertions, 11 deletions

diff --git a/src/mesa/main/feedback.c b/src/mesa/main/feedback.c
index 2b6ff083b8..71c1025d90 100644
--- a/src/mesa/main/feedback.c
+++ b/src/mesa/main/feedback.c
@@ -1,4 +1,4 @@
-/* $Id: feedback.c,v 1.7 2000/01/17 15:40:43 brianp Exp $ */
+/* $Id: feedback.c,v 1.8 2000/01/25 16:49:20 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -157,13 +157,14 @@ void gl_feedback_vertex( GLcontext *ctx,
 
 
 
-static void gl_do_feedback_vertex( GLcontext *ctx, GLuint v, GLuint pv )
+static void feedback_vertex( GLcontext *ctx, GLuint v, GLuint pv )
 {
    GLfloat win[4];
    GLfloat color[4];
    GLfloat tc[4];
    GLuint texUnit = ctx->Texture.CurrentTransformUnit;
-   struct vertex_buffer *VB = ctx->VB;
+   const struct vertex_buffer *VB = ctx->VB;
+   GLuint index;
 
    win[0] = VB->Win.data[v][0];
    win[1] = VB->Win.data[v][1];
@@ -190,7 +191,12 @@ static void gl_do_feedback_vertex( GLcontext *ctx, GLuint v, GLuint pv )
 		 VB->TexCoordPtr[texUnit]->data[v]);
    }
 
-   gl_feedback_vertex( ctx, win, color, VB->IndexPtr->data[v], tc );
+   if (VB->IndexPtr)
+      index = VB->IndexPtr->data[v];
+   else
+      index = 0;
+
+   gl_feedback_vertex( ctx, win, color, index, tc );
 }
 
 
@@ -205,9 +211,9 @@ void gl_feedback_triangle( GLcontext *ctx,
       FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_POLYGON_TOKEN );
       FEEDBACK_TOKEN( ctx, (GLfloat) 3 );        /* three vertices */
       
-      gl_do_feedback_vertex( ctx, v0, pv );
-      gl_do_feedback_vertex( ctx, v1, pv );
-      gl_do_feedback_vertex( ctx, v2, pv );
+      feedback_vertex( ctx, v0, pv );
+      feedback_vertex( ctx, v1, pv );
+      feedback_vertex( ctx, v2, pv );
    }
 }
 
@@ -221,8 +227,8 @@ void gl_feedback_line( GLcontext *ctx, GLuint v1, GLuint v2, GLuint pv )
 
    FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) token );
 
-   gl_do_feedback_vertex( ctx, v1, pv );
-   gl_do_feedback_vertex( ctx, v2, pv );
+   feedback_vertex( ctx, v1, pv );
+   feedback_vertex( ctx, v2, pv );
 
    ctx->StippleCounter++;
 }
@@ -230,13 +236,13 @@ void gl_feedback_line( GLcontext *ctx, GLuint v1, GLuint v2, GLuint pv )
 
 void gl_feedback_points( GLcontext *ctx, GLuint first, GLuint last )
 {
-   struct vertex_buffer *VB = ctx->VB;
+   const struct vertex_buffer *VB = ctx->VB;
    GLuint i;
 
    for (i=first;i<=last;i++) {
       if (VB->ClipMask[i]==0) {
          FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_POINT_TOKEN );
-	 gl_do_feedback_vertex( ctx, i, i );
+	 feedback_vertex( ctx, i, i );
       }
    }
 }