From 4a71993ec6ef433bc44dc91c8cc776c7b402fe9f Mon Sep 17 00:00:00 2001
From: Thilo Schulz <arny@ats.s.bawue.de>
Date: Thu, 16 Jun 2011 22:28:13 +0000
Subject: patch by Zack Middleton (#5044) - Fix a few comments in tr_local.h -
 A bit of refactoring of the cpp macros

---
 src/renderer/tr_local.h | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/src/renderer/tr_local.h b/src/renderer/tr_local.h
index 1dea4bb3..fe7a4ba5 100644
--- a/src/renderer/tr_local.h
+++ b/src/renderer/tr_local.h
@@ -40,15 +40,16 @@ typedef unsigned int glIndex_t;
 // parallel on a dual cpu machine
 #define	SMP_FRAMES		2
 
-// 12 bits
+// 14 bits
+// can't be increased without changing bit packing for drawsurfs
 // see QSORT_SHADERNUM_SHIFT
-#define	MAX_SHADERS				16384
+#define SHADERNUM_BITS	14
+#define MAX_SHADERS		(1<<SHADERNUM_BITS)
 
 //#define MAX_SHADER_STATES 2048
 #define MAX_STATES_PER_SHADER 32
 #define MAX_STATE_NAME 32
 
-// can't be increased without changing bit packing for drawsurfs
 
 
 typedef struct dlight_s {
@@ -822,21 +823,24 @@ compared quickly during the qsorting process
 
 the bits are allocated as follows:
 
-21 - 31	: sorted shader index
-11 - 20	: entity index
-2 - 6	: fog index
-//2		: used to be clipped flag REMOVED - 03.21.00 rad
 0 - 1	: dlightmap index
+//2		: used to be clipped flag REMOVED - 03.21.00 rad
+2 - 6	: fog index
+11 - 20	: entity index
+21 - 31	: sorted shader index
 
 	TTimo - 1.32
-17-31 : sorted shader index
-7-16  : entity index
-2-6   : fog index
 0-1   : dlightmap index
+2-6   : fog index
+7-16  : entity index
+17-30 : sorted shader index
 */
-#define	QSORT_SHADERNUM_SHIFT	17
+#define	QSORT_FOGNUM_SHIFT	2
 #define	QSORT_ENTITYNUM_SHIFT	7
-#define	QSORT_FOGNUM_SHIFT		2
+#define	QSORT_SHADERNUM_SHIFT	(QSORT_ENTITYNUM_SHIFT+GENTITYNUM_BITS)
+#if (QSORT_SHADERNUM_SHIFT+SHADERNUM_BITS) > 32
+	#error "Need to update sorting, too many bits."
+#endif
 
 extern	int			gl_filter_min, gl_filter_max;
 
-- 
cgit