mesa: Compute effective buffer bindings in the vao.

Compute VAO buffer binding information past the position/generic0 mapping.
Scan for duplicate buffer bindings and collapse them into derived
effective buffer binding index and effective attribute mask variables.
Provide a set of helper functions to access the distilled
information in the VAO. All of them prefixed with _mesa_draw_...
to indicate that they are meant to query draw information.

v2: Also group user space arrays containing interleaved arrays.
    Add _Eff*Offset to be copied on attribute and binding copy.
    Update comments.

Reviewed-by: Brian Paul <[email protected]>
Signed-off-by: Mathias Fröhlich <[email protected]>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/mesa/main/attrib.c b/src/mesa/main/attrib.c
index 6127a556d73..e565750a891 100644
--- a/src/mesa/main/attrib.c
+++ b/src/mesa/main/attrib.c
@@ -1552,6 +1552,7 @@ copy_array_object(struct gl_context *ctx,
 
    /* _Enabled must be the same than on push */
    dest->_Enabled = src->_Enabled;
+   dest->_EffEnabledVBO = src->_EffEnabledVBO;
    /* The bitmask of bound VBOs needs to match the VertexBinding array */
    dest->VertexAttribBufferMask = src->VertexAttribBufferMask;
    dest->_AttributeMapMode = src->_AttributeMapMode;