From fd6636ebc06d55b59851701c436b8b97f50fd7f4 Mon Sep 17 00:00:00 2001
From: Marek Olšák <marek.olsak@amd.com>
Date: Wed, 22 Jan 2020 22:38:09 -0500
Subject: st/mesa: simplify determination whether a draw needs min/max index
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Reviewed-by: Mathias Fröhlich <mathias.froehlich@web.de>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3829>
---
 src/mesa/main/arrayobj.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'src/mesa/main/arrayobj.h')

diff --git a/src/mesa/main/arrayobj.h b/src/mesa/main/arrayobj.h
index 584e6d818cf..19ab65b3242 100644
--- a/src/mesa/main/arrayobj.h
+++ b/src/mesa/main/arrayobj.h
@@ -211,6 +211,20 @@ _mesa_draw_user_array_bits(const struct gl_context *ctx)
 }
 
 
+/**
+ * Return which enabled vertex attributes have a non-zero instance divisor.
+ *
+ * Needs the a fully updated VAO ready for draw.
+ */
+static inline GLbitfield
+_mesa_draw_nonzero_divisor_bits(const struct gl_context *ctx)
+{
+   const struct gl_vertex_array_object *const vao = ctx->Array._DrawVAO;
+   assert(vao->NewArrays == 0);
+   return ~vao->_EffEnabledNonZeroDivisor & ctx->Array._DrawVAOEnabledAttribs;
+}
+
+
 /**
  * Return enabled current values attribute bits for draw.
  */
-- 
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