light: experimental -parse_escape_sequences option to toggle \b escape sequence (toggles bold text)

include/light/light.h

@@ -150,6 +150,7 @@ extern int oversample;
 extern qboolean write_litfile;
 extern qboolean write_luxfile;
 extern qboolean onlyents;
+extern qboolean parse_escape_sequences;
 
 void SetupDirt();
 

light/entities.c

@@ -940,6 +940,29 @@ Get_EntityStringSize(const entity_t *entities)
     return size;
 }
 
+const char *
+CopyValueWithEscapeSequencesParsed(const char *value)
+{
+    char *result = copystring(value);
+    const char *inptr = value;
+    char *outptr = result;
+    qboolean bold = false;
+    
+    for ( ; *inptr; inptr++) {
+        if (inptr[0] == '\\' && inptr[1] == 'b') {
+            bold = !bold; // Toggle bold
+            inptr++;
+            continue;
+        } else {
+            int mask = bold ? 128 : 0;
+            *(outptr++) = *inptr | mask;
+        }
+    }
+    *outptr = 0;
+    
+    return result;
+}
+
 /*
  * ================
  * WriteEntitiesToString
@@ -979,8 +1002,20 @@ WriteEntitiesToString(bsp2_t *bsp)
 	space -= length;
 
 	for (epair = entity->epairs; epair; epair = epair->next) {
+            const char *value;
+            if (parse_escape_sequences) {
+                value = CopyValueWithEscapeSequencesParsed(epair->value);
+            } else {
+                value = epair->value;
+            }
+            
 	    length = snprintf(pos, space, "\"%s\" \"%s\"\n",
-			      epair->key, epair->value);
+			      epair->key, value);
+            
+            if (parse_escape_sequences) {
+                free(value);
+            }
+            
 	    pos += length;
 	    space -= length;
 	}

light/light.c

@@ -78,6 +78,7 @@ int oversample = 1;
 qboolean write_litfile = false;
 qboolean write_luxfile = false;
 qboolean onlyents = false;
+qboolean parse_escape_sequences = false;
 
 void
 GetFileSpace(byte **lightdata, byte **colordata, byte **deluxdata, int size)
@@ -376,6 +377,9 @@ main(int argc, const char **argv)
 	} else if ( !strcmp( argv[ i ], "-onlyents" ) ) {
 	    onlyents = true;
 	    logprint( "Onlyents mode enabled\n" );
+        } else if ( !strcmp( argv[ i ], "-parse_escape_sequences" ) ) {
+            parse_escape_sequences = true;
+            logprint( "Parsing escape sequences enabled\n" );
 	} else if (argv[i][0] == '-')
 	    Error("Unknown option \"%s\"", argv[i]);
 	else
@@ -387,7 +391,7 @@ main(int argc, const char **argv)
 	       "             [-light num] [-addmin] [-anglescale|-anglesense]\n"
 	       "             [-dist n] [-range n] [-gate n] [-lit] [-lux]\n"
 	       "             [-dirt] [-dirtdebug] [-dirtmode n] [-dirtdepth n] [-dirtscale n] [-dirtgain n] [-dirtangle n]\n"
-	       "             [-soft [n]] [-fence] [-gamma n] [-surflight_subdivide n] [-onlyents] [-sunsamples n] bspfile\n");
+	       "             [-soft [n]] [-fence] [-gamma n] [-surflight_subdivide n] [-onlyents] [-sunsamples n] [-parse_escape_sequences] bspfile\n");
 	exit(1);
     }