Initial work for post-transformed vertex feedback buffers.

This will be used for:
   GL_NV_transform_feedback, or similar GL3 functionality
   glRasterPos
   GL selection/feedback modes

1 files changed, 15 insertions, 0 deletions

diff --git a/src/mesa/pipe/p_state.h b/src/mesa/pipe/p_state.h
index 25e5861e1e..cad96807df 100644
--- a/src/mesa/pipe/p_state.h
+++ b/src/mesa/pipe/p_state.h
@@ -49,6 +49,7 @@
 #define PIPE_ATTRIB_MAX      32
 #define PIPE_MAX_COLOR_BUFS   8
 #define PIPE_MAX_TEXTURE_LEVELS  16
+#define PIPE_MAX_FEEDBACK_ATTRIBS 16
 
 
 /* fwd decl */
@@ -92,6 +93,20 @@ struct pipe_setup_state
    float offset_scale;
 };
 
+
+/**
+ * Post-transform vertex feeback
+ */
+struct pipe_feedback_state {
+   uint enabled:1;        /**< enable feedback? */
+   uint discard:1;        /**< discard primitives? */
+   uint interleaved:1;    /**< interleaved output? */
+   uint num_attribs;
+   uint attrib[PIPE_MAX_FEEDBACK_ATTRIBS];
+   uint size[PIPE_MAX_FEEDBACK_ATTRIBS];
+};
+
+
 struct pipe_poly_stipple {
    unsigned stipple[32];
 };