1 files changed, 32 insertions, 13 deletions

diff --git a/src/gallium/drivers/softpipe/sp_prim_vbuf.c b/src/gallium/drivers/softpipe/sp_prim_vbuf.c
index 9cd5784e5bc..d56eed80a4f 100644
--- a/src/gallium/drivers/softpipe/sp_prim_vbuf.c
+++ b/src/gallium/drivers/softpipe/sp_prim_vbuf.c
@@ -60,6 +60,7 @@ struct softpipe_vbuf_render
    struct softpipe_context *softpipe;
    uint prim;
    uint vertex_size;
+   uint vertex_buffer_size;
    void *vertex_buffer;
 };
 
@@ -80,26 +81,44 @@ sp_vbuf_get_vertex_info(struct vbuf_render *vbr)
 }
 
 
-static void *
+static boolean
 sp_vbuf_allocate_vertices(struct vbuf_render *vbr,
-                            ushort vertex_size, ushort nr_vertices)
+                          ushort vertex_size, ushort nr_vertices)
 {
    struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
-   assert(!cvbr->vertex_buffer);
-   cvbr->vertex_buffer = align_malloc(vertex_size * nr_vertices, 16);
+   unsigned size = vertex_size * nr_vertices;
+
+   if (cvbr->vertex_buffer_size < size) {
+      align_free(cvbr->vertex_buffer);
+      cvbr->vertex_buffer = align_malloc(size, 16);
+      cvbr->vertex_buffer_size = size;
+   }
+
    cvbr->vertex_size = vertex_size;
-   return cvbr->vertex_buffer;
+   return cvbr->vertex_buffer != NULL;
 }
 
-
 static void
-sp_vbuf_release_vertices(struct vbuf_render *vbr, void *vertices,
-                           unsigned vertex_size, unsigned vertices_used)
+sp_vbuf_release_vertices(struct vbuf_render *vbr)
+{
+   /* keep the old allocation for next time */
+}
+
+static void *
+sp_vbuf_map_vertices(struct vbuf_render *vbr)
 {
    struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
-   align_free(vertices);
-   assert(vertices == cvbr->vertex_buffer);
-   cvbr->vertex_buffer = NULL;
+   return cvbr->vertex_buffer;
+}
+
+static void 
+sp_vbuf_unmap_vertices(struct vbuf_render *vbr, 
+                       ushort min_index,
+                       ushort max_index )
+{
+   struct softpipe_vbuf_render *cvbr = softpipe_vbuf_render(vbr);
+   assert( cvbr->vertex_buffer_size >= (max_index+1) * cvbr->vertex_size );
+   /* do nothing */
 }
 
 
@@ -115,8 +134,6 @@ sp_vbuf_set_primitive(struct vbuf_render *vbr, unsigned prim)
    
    setup_prepare( setup_ctx );
 
-
-
    cvbr->prim = prim;
    return TRUE;
 
@@ -394,6 +411,8 @@ sp_init_vbuf(struct softpipe_context *sp)
 
    sp->vbuf_render->base.get_vertex_info = sp_vbuf_get_vertex_info;
    sp->vbuf_render->base.allocate_vertices = sp_vbuf_allocate_vertices;
+   sp->vbuf_render->base.map_vertices = sp_vbuf_map_vertices;
+   sp->vbuf_render->base.unmap_vertices = sp_vbuf_unmap_vertices;
    sp->vbuf_render->base.set_primitive = sp_vbuf_set_primitive;
    sp->vbuf_render->base.draw = sp_vbuf_draw;
    sp->vbuf_render->base.draw_arrays = sp_vbuf_draw_arrays;