From: Mathias Fröhlich <mathias.froehl...@web.de>
Implement the equivalent of vbo_all_varyings_in_vbos for
vertex array objects.
Signed-off-by: Mathias Fröhlich <mathias.froehl...@web.de>
---
src/mesa/main/arrayobj.c | 35 +++++++++++++++++++++++++++++++++++
src/mesa/main/arrayobj.h | 4 ++++
2 files changed, 39 insertions(+)
diff --git a/src/mesa/main/arrayobj.c b/src/mesa/main/arrayobj.c
index 9c3451e..041ee63 100644
--- a/src/mesa/main/arrayobj.c
+++ b/src/mesa/main/arrayobj.c
@@ -359,6 +359,41 @@ _mesa_update_vao_client_arrays(struct gl_context *ctx,
}
+bool
+_mesa_all_varyings_in_vbos(const struct gl_vertex_array_object *vao)
+{
+ /* Walk those enabled arrays that have the default vbo attached */
+ GLbitfield64 mask = vao->_Enabled & ~vao->VertexAttribBufferMask;
+
+ while (mask) {
+ /** We do not use u_bit_scan64 as we can here walk
+ * multiple attrib arrays at once
+ */
+ const int i = ffsll(mask) - 1;
+ const struct gl_vertex_attrib_array *attrib_array =
+ &vao->VertexAttrib[i];
+ const struct gl_vertex_buffer_binding *buffer_binding =
+ &vao->VertexBinding[attrib_array->VertexBinding];
+
+ /* Only enabled arrays shall appear in the _Enabled bitmask */
+ assert(attrib_array->Enabled);
+ /* We have already masked out vao->VertexAttribBufferMask */
+ assert(!_mesa_is_bufferobj(buffer_binding->BufferObj));
+
+ /* Bail out once we find the first non vbo with a non zero stride */
+ if (buffer_binding->Stride != 0)
+ return false;
+
+ /* Note that we cannot use the xor variant since the _BoundArray mask
+ * may contain array attributes that are bound but not enabled.
+ */
+ mask &= ~buffer_binding->_BoundArrays;
+ }
+
+ return true;
+}
+
+
/**********************************************************************/
/* API Functions */
/**********************************************************************/
diff --git a/src/mesa/main/arrayobj.h b/src/mesa/main/arrayobj.h
index 6a4247f..d30c85c 100644
--- a/src/mesa/main/arrayobj.h
+++ b/src/mesa/main/arrayobj.h
@@ -81,6 +81,10 @@ extern void
_mesa_update_vao_client_arrays(struct gl_context *ctx,
struct gl_vertex_array_object *vao);
+/* Returns true if all varying arrays reside in vbos */
+extern bool
+_mesa_all_varyings_in_vbos(const struct gl_vertex_array_object *vao);
+
/*
* API functions
*/
--
2.5.5
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