draw: nuke the interp parameter from vertex_info

draw emit couldn't care less what the interpolation mode is...
This somehow looked like it would matter, all drivers more or less
dutifully filled that in correctly. But this is only used for emit,
if draw needs to know about interpolation mode (for clipping for instance)
it will get that information from the vs anyway.
softpipe actually used to depend on that interpolation parameter, as it
abused that structure quite a bit but no longer.

Reviewed-by: Brian Paul <[email protected]>
Reviewed-by: Edward O'Callaghan <[email protected]>

1 files changed, 12 insertions, 1 deletions

diff --git a/src/gallium/drivers/softpipe/sp_setup.h b/src/gallium/drivers/softpipe/sp_setup.h
index 8bb50b98fec..9efae1cb5ed 100644
--- a/src/gallium/drivers/softpipe/sp_setup.h
+++ b/src/gallium/drivers/softpipe/sp_setup.h
@@ -30,10 +30,21 @@
 struct setup_context;
 struct softpipe_context;
 
+/**
+ * Attribute interpolation mode
+ */
+enum sp_interp_mode {
+   SP_INTERP_POS,       /**< special case for frag position */
+   SP_INTERP_CONSTANT,
+   SP_INTERP_LINEAR,
+   SP_INTERP_PERSPECTIVE
+};
+
+
 struct sp_setup_info {
    unsigned valid;
    struct {
-      unsigned interp:8;      /**< INTERP_X */
+      unsigned interp:8;      /**< SP_INTERP_X */
       unsigned src_index:8;
    } attrib[PIPE_MAX_SHADER_OUTPUTS];
 };