From 29c81427842d282127c0e12789a156a1f833dcae Mon Sep 17 00:00:00 2001
From: peter1138 <peter1138@openttd.org>
Date: Sat, 24 Feb 2007 23:20:21 +0000
Subject: (svn r8890) -Codechange: (NewGRF) add cargo translation support to
 engine var 47

---
 src/newgrf.cpp | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'src/newgrf.cpp')

diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index 41fa5f0bb..1263ea151 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -3707,6 +3707,29 @@ static void ClearTemporaryNewGRFData(void)
 	_cur_grffile->spritegroups_count = 0;
 }
 
+static void BuildCargoTranslationMap()
+{
+	memset(_cur_grffile->cargo_map, 0xFF, sizeof(_cur_grffile->cargo_map));
+
+	for (CargoID c = 0; c < NUM_CARGO; c++) {
+		const CargoSpec *cs = GetCargo(c);
+		if (!cs->IsValid()) continue;
+
+		if (_cur_grffile->cargo_max == 0) {
+			/* Default translation table, so just a straight mapping to bitnum */
+			_cur_grffile->cargo_map[c] = cs->bitnum;
+		} else {
+			/* Check the translation table for this cargo's label */
+			for (uint i = 0; i < _cur_grffile->cargo_max; i++) {
+				if (cs->label == _cur_grffile->cargo_list[i]) {
+					_cur_grffile->cargo_map[c] = i;
+					break;
+				}
+			}
+		}
+	}
+}
+
 static void InitNewGRFFile(const GRFConfig *config, int sprite_offset)
 {
 	GRFFile *newfile;
@@ -4032,6 +4055,7 @@ void LoadNewGRF(uint load_index, uint file_index)
 			LoadNewGRFFile(c, slot++, stage);
 			if (stage == GLS_ACTIVATION) {
 				ClearTemporaryNewGRFData();
+				BuildCargoTranslationMap();
 				DEBUG(sprite, 2, "Currently %i sprites are loaded", _cur_spriteid);
 			}
 		}
-- 
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