Add a NotifyInputChanges() callback so that drivers (particularly tnl

drivers) can track when the sizes or strides of incoming VB->AttribPtr
arrays have changed.

2 files changed, 9 insertions, 0 deletions

diff --git a/src/mesa/tnl/t_context.h b/src/mesa/tnl/t_context.h
index f7a29f9e7e8..9eaff95b73d 100644
--- a/src/mesa/tnl/t_context.h
+++ b/src/mesa/tnl/t_context.h
@@ -643,6 +643,11 @@ struct tnl_device_driver
    /* Alert tnl-aware drivers of changes to material.
     */
 
+   void (*NotifyInputChanges)(GLcontext *ctx, GLuint bitmask);
+   /* Alert tnl-aware drivers of changes to size and stride of input
+    * arrays.
+    */
+
    GLboolean (*NotifyBegin)(GLcontext *ctx, GLenum p);
    /* Allow drivers to hook in optimized begin/end engines.
     * Return value:  GL_TRUE - driver handled the begin
diff --git a/src/mesa/tnl/t_pipeline.c b/src/mesa/tnl/t_pipeline.c
index 61bfed290e9..2a87f950ce2 100644
--- a/src/mesa/tnl/t_pipeline.c
+++ b/src/mesa/tnl/t_pipeline.c
@@ -90,6 +90,10 @@ static GLuint check_input_changes( GLcontext *ctx )
       }
    }
 
+   if (tnl->pipeline.input_changes &&
+      tnl->Driver.NotifyInputChanges) 
+      tnl->Driver.NotifyInputChanges( ctx, tnl->pipeline.input_changes );
+
    return tnl->pipeline.input_changes;
 }