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-rw-r--r--src/newgrf.cpp25
1 files changed, 23 insertions, 2 deletions
diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index e1ff6c3a1..4920ca3d6 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -3434,6 +3434,28 @@ static void SafeParamSet(byte *buf, int len)
_skip_sprites = -1;
}
+
+static uint32 GetPatchVariable(uint8 param)
+{
+ switch (param) {
+ /* start year - 1920 */
+ case 0x0B: return _cur_year - ORIGINAL_BASE_YEAR;
+ /* freight trains weight factor */
+ case 0x0E: return _patches.freight_trains;
+ /* empty wagon speed increase */
+ case 0x0F: return 0;
+ /* plane speed factor */
+ case 0x10: return 4;
+ /* 2CC colormap base sprite */
+ case 0x11: return SPR_2CCMAP_BASE;
+
+ default:
+ grfmsg(2, "ParamSet: Unknown Patch variable 0x%02X.", param);
+ return 0;
+ }
+}
+
+
/* Action 0x0D */
static void ParamSet(byte *buf, int len)
{
@@ -3488,8 +3510,7 @@ static void ParamSet(byte *buf, int len)
if (GB(data, 0, 8) == 0xFF) {
if (data == 0x0000FFFF) {
/* Patch variables */
- grfmsg(2, "ParamSet: Reading Patch variables unsupported");
- return;
+ src1 = GetPatchVariable(src1);
} else {
/* GRF Resource Management */
if (_cur_stage != GLS_ACTIVATION) {