r300g: fixup 0 stride buffer properly.

Just set the max index to 1, this lets doom3 run and seems correct,
though it would be better to just emit a constant like SVGA does.

Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/gallium/drivers/r300/r300_state.c b/src/gallium/drivers/r300/r300_state.c
index 371e52d..1c31826 100644 (file)
--- a/src/gallium/drivers/r300/r300_state.c
+++ b/src/gallium/drivers/r300/r300_state.c
@@ -1192,14 +1192,13 @@ static void r300_set_vertex_buffers(struct pipe_context* pipe,
         }
 
         if (vbo->max_index == ~0) {
-            /* Bogus value from broken state tracker; hax it. */
-           /* TODO - more hax - fixes doom3 from almos on irc */
-           if (!vbo->stride) {
-               fprintf(stderr, "r300: got a VBO with stride 0 fixing up to stide 4\n");
-               vbo->stride = 4;
-           }
-            vbo->max_index =
-                (vbo->buffer->width0 - vbo->buffer_offset) / vbo->stride;
+           /* if no VBO stride then only one vertex value so max index is 1 */
+           /* should think about converting to VS constants like svga does */
+           if (!vbo->stride)
+               vbo->max_index = 1;
+           else
+               vbo->max_index =
+                                (vbo->buffer->width0 - vbo->buffer_offset) / vbo->stride;
         }
 
         max_index = MIN2(vbo->max_index, max_index);