From 301b187ca9a811b608894d20bab934af0a10b8ab Mon Sep 17 00:00:00 2001
From: Keith Whitwell <keith@tungstengraphics.com>
Date: Sun, 23 Mar 2008 18:21:00 +0000
Subject: [PATCH] draw:  fix some unsigned vs ushort confusion

Middle-end elements are ushort, but prior to that have to treat all
elements as unsigned to avoid wrapping and/or overruns.
---
 src/gallium/auxiliary/draw/draw_pt.h        | 2 +-
 src/gallium/auxiliary/draw/draw_pt_elts.c   | 8 ++++----
 src/gallium/auxiliary/draw/draw_pt_vcache.c | 9 ++++-----
 3 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/src/gallium/auxiliary/draw/draw_pt.h b/src/gallium/auxiliary/draw/draw_pt.h
index 1b81d196f62..f56fa8d5ccd 100644
--- a/src/gallium/auxiliary/draw/draw_pt.h
+++ b/src/gallium/auxiliary/draw/draw_pt.h
@@ -35,7 +35,7 @@
 
 #include "pipe/p_compiler.h"
 
-typedef ushort (*pt_elt_func)( const void *elts, ushort idx );
+typedef unsigned (*pt_elt_func)( const void *elts, unsigned idx );
 
 
 /* The "front end" - prepare sets of fetch, draw elements for the
diff --git a/src/gallium/auxiliary/draw/draw_pt_elts.c b/src/gallium/auxiliary/draw/draw_pt_elts.c
index 585b83fa903..f337f71ea0e 100644
--- a/src/gallium/auxiliary/draw/draw_pt_elts.c
+++ b/src/gallium/auxiliary/draw/draw_pt_elts.c
@@ -37,22 +37,22 @@
  * the start value into a pointer.  
  */
 
-static ushort elt_uint( const void *elts, ushort idx )
+static unsigned elt_uint( const void *elts, unsigned idx )
 {
    return *(((const uint *)elts) + idx);
 }
 
-static ushort elt_ushort( const void *elts, ushort idx )
+static unsigned elt_ushort( const void *elts, unsigned idx )
 {
    return *(((const ushort *)elts) + idx);
 }
 
-static ushort elt_ubyte( const void *elts, ushort idx )
+static unsigned elt_ubyte( const void *elts, unsigned idx )
 {
    return *(((const ubyte *)elts) + idx);
 }
 
-static ushort elt_vert( const void *elts, ushort idx )
+static unsigned elt_vert( const void *elts, unsigned idx )
 {
    return (const ubyte *)elts - (const ubyte *)NULL + idx;
 }
diff --git a/src/gallium/auxiliary/draw/draw_pt_vcache.c b/src/gallium/auxiliary/draw/draw_pt_vcache.c
index 07e9f0ae5fa..98c22eb4d4a 100644
--- a/src/gallium/auxiliary/draw/draw_pt_vcache.c
+++ b/src/gallium/auxiliary/draw/draw_pt_vcache.c
@@ -45,7 +45,7 @@
 struct vcache_frontend {
    struct draw_pt_front_end base;
 
-   ushort in[CACHE_MAX];
+   unsigned in[CACHE_MAX];
    ushort out[CACHE_MAX];
 
    ushort draw_elts[DRAW_MAX];
@@ -74,13 +74,14 @@ static void vcache_flush( struct vcache_frontend *vcache )
    }
 #endif
 
-   if (vcache->draw_count)
+   if (vcache->draw_count) {
       vcache->middle->run( vcache->middle,
                            vcache->output_prim,
                            vcache->fetch_elts,
                            vcache->fetch_count,
                            vcache->draw_elts,
                            vcache->draw_count );
+   }
 
    memset(vcache->in, ~0, sizeof(vcache->in));
    vcache->fetch_count = 0;
@@ -100,9 +101,7 @@ static void vcache_check_flush( struct vcache_frontend *vcache )
 static void vcache_elt( struct vcache_frontend *vcache,
                         unsigned felt )
 {
-   // ushort felt = elt(draw, i);
-
-   ushort idx = felt % CACHE_MAX;
+   unsigned idx = felt % CACHE_MAX;
 
    if (vcache->in[idx] != felt) {
       assert(vcache->fetch_count < FETCH_MAX);
-- 
2.30.2