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-rw-r--r--src/mesa/main/dd.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/mesa/main/dd.h b/src/mesa/main/dd.h
index 9a10fd0d4b..d2b985f384 100644
--- a/src/mesa/main/dd.h
+++ b/src/mesa/main/dd.h
@@ -1,4 +1,4 @@
-/* $Id: dd.h,v 1.13 2000/03/03 15:38:57 brianp Exp $ */
+/* $Id: dd.h,v 1.14 2000/03/03 17:54:56 brianp Exp $ */
/*
* Mesa 3-D graphics library
@@ -391,6 +391,8 @@ struct dd_function_table {
/***
*** For supporting hardware Z buffers:
*** Either ALL or NONE of these functions must be implemented!
+ *** NOTE that Each depth value is a 32-bit GLuint. If the depth
+ *** buffer is less than 32 bits deep then the extra upperbits are zero.
***/
void (*WriteDepthSpan)( GLcontext *ctx, GLuint n, GLint x, GLint y,