draw: Add draw_set_index_buffer and others.

This commit adds draw_set_index_buffer, draw_set_mapped_index_buffer,
and draw_vbo.  The idea behind the new functions is that an index buffer
should be a state.

draw_arrays and draw_set_mapped_element_buffer are preserved, but the
latter will be removed soon.

1 files changed, 29 insertions, 6 deletions

diff --git a/src/gallium/auxiliary/draw/draw_context.c b/src/gallium/auxiliary/draw/draw_context.c
index d118a8db52..c2b7a441bd 100644
--- a/src/gallium/auxiliary/draw/draw_context.c
+++ b/src/gallium/auxiliary/draw/draw_context.c
@@ -496,6 +496,27 @@ void draw_set_render( struct draw_context *draw,
 }
 
 
+void
+draw_set_index_buffer(struct draw_context *draw,
+                      const struct pipe_index_buffer *ib)
+{
+   if (ib)
+      memcpy(&draw->pt.index_buffer, ib, sizeof(draw->pt.index_buffer));
+   else
+      memset(&draw->pt.index_buffer, 0, sizeof(draw->pt.index_buffer));
+}
+
+
+/**
+ * Tell drawing context where to find mapped index/element buffer.
+ */
+void
+draw_set_mapped_index_buffer(struct draw_context *draw,
+                             const void *elements)
+{
+    draw->pt.user.elts = elements;
+}
+
 
 /**
  * Tell the drawing context about the index/element buffer to use
@@ -515,8 +536,13 @@ draw_set_mapped_element_buffer_range( struct draw_context *draw,
                                       unsigned max_index,
                                       const void *elements )
 {
+   struct pipe_index_buffer ib;
+
+   memset(&ib, 0, sizeof(ib));
+   ib.index_size = eltSize;
+   draw_set_index_buffer(draw, &ib);
+
    draw->pt.user.elts = elements;
-   draw->pt.user.eltSize = eltSize;
    draw->pt.user.eltBias = eltBias;
    draw->pt.user.min_index = min_index;
    draw->pt.user.max_index = max_index;
@@ -529,11 +555,8 @@ draw_set_mapped_element_buffer( struct draw_context *draw,
                                 int eltBias,
                                 const void *elements )
 {
-   draw->pt.user.elts = elements;
-   draw->pt.user.eltSize = eltSize;
-   draw->pt.user.eltBias = eltBias;
-   draw->pt.user.min_index = 0;
-   draw->pt.user.max_index = 0xffffffff;
+   draw_set_mapped_element_buffer_range(draw,
+         eltSize, eltBias, 0, 0xffffffff, elements);
 }