From 8ec6018ba22907cdd64d1d714dde27b49d5e67e6 Mon Sep 17 00:00:00 2001
From: MotoLegacy <motolegacy@proton.me>
Date: Thu, 28 Nov 2024 20:23:54 -0800
Subject: [PATCH] CTR/PSP: Bump MAX_LIGHTMAPS to 128

---
 source/ctr/gl/gl_rsurf.c | 17 +++++++++++++----
 source/psp/gu/gu_psp.h   |  2 +-
 2 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/source/ctr/gl/gl_rsurf.c b/source/ctr/gl/gl_rsurf.c
index 4899df6..f45dc7b 100644
--- a/source/ctr/gl/gl_rsurf.c
+++ b/source/ctr/gl/gl_rsurf.c
@@ -35,7 +35,7 @@ unsigned		blocklights[3*18*18]; // LordHavoc: .lit support (*3 for RGB) to the d
 #define	BLOCK_WIDTH		128
 #define	BLOCK_HEIGHT	128
 
-#define	MAX_LIGHTMAPS	64
+#define	MAX_LIGHTMAPS	128
 int			active_lightmaps;
 
 typedef struct glRect_s {
@@ -1516,15 +1516,23 @@ void R_MarkLeaves (void)
 =============================================================================
 */
 
-// returns a texture number and the position inside it
+/*
+========================
+AllocBlock -- returns a texture number and the position inside it
+========================
+*/
 int AllocBlock (int w, int h, int *x, int *y)
 {
 	int		i, j;
 	int		best, best2;
-	int		bestx;
 	int		texnum;
 
-	for (texnum=0 ; texnum<MAX_LIGHTMAPS ; texnum++)
+	// ericw -- rather than searching starting at lightmap 0 every time,
+	// start at the last lightmap we allocated a surface in.
+	// This makes AllocBlock much faster on large levels (can shave off 3+ seconds
+	// of load time on a level with 180 lightmaps), at a cost of not quite packing
+	// lightmaps as tightly vs. not doing this (uses ~5% more lightmaps)
+	for (texnum=last_lightmap_allocated ; texnum<MAX_LIGHTMAPS ; texnum++, last_lightmap_allocated++)
 	{
 		best = BLOCK_HEIGHT;
 
@@ -1556,6 +1564,7 @@ int AllocBlock (int w, int h, int *x, int *y)
 	}
 
 	Sys_Error ("AllocBlock: full");
+	return 0; //johnfitz -- shut up compiler
 }
 
 
diff --git a/source/psp/gu/gu_psp.h b/source/psp/gu/gu_psp.h
index 9c2b9ac..ee878aa 100644
--- a/source/psp/gu/gu_psp.h
+++ b/source/psp/gu/gu_psp.h
@@ -106,7 +106,7 @@ half-life Render Modes. Crow_bar
 
 #define BACKFACE_EPSILON	0.01
 
-#define MAX_LIGHTMAPS       64
+#define MAX_LIGHTMAPS       128
 
 
 void R_TimeRefresh_f (void);