# HG changeset patch
# User michi_cc <michi_cc@openttd.org>
# Date 1320100295 0
# Node ID 06aefc7e77d0743f9618e4090e15eff5b9046f33
# Parent  800fb3479a7e349de85c77a0779629e4b05d5bce
(svn r23071) -Codechange: [NewGRF] Allow passing custom extra data through the generic NewGRF animation helper class.

diff --git a/src/newgrf_airporttiles.cpp b/src/newgrf_airporttiles.cpp
--- a/src/newgrf_airporttiles.cpp
+++ b/src/newgrf_airporttiles.cpp
@@ -243,7 +243,7 @@
 	res->grffile         = ats->grf_prop.grffile;
 }
 
-uint16 GetAirportTileCallback(CallbackID callback, uint32 param1, uint32 param2, const AirportTileSpec *ats, Station *st, TileIndex tile)
+uint16 GetAirportTileCallback(CallbackID callback, uint32 param1, uint32 param2, const AirportTileSpec *ats, Station *st, TileIndex tile, int extra_data = 0)
 {
 	ResolverObject object;
 	const SpriteGroup *group;
@@ -306,7 +306,7 @@
 }
 
 /** Helper class for animation control. */
-struct AirportTileAnimationBase : public AnimationBase<AirportTileAnimationBase, AirportTileSpec, Station, GetAirportTileCallback> {
+struct AirportTileAnimationBase : public AnimationBase<AirportTileAnimationBase, AirportTileSpec, Station, int, GetAirportTileCallback> {
 	static const CallbackID cb_animation_speed      = CBID_AIRPTILE_ANIMATION_SPEED;
 	static const CallbackID cb_animation_next_frame = CBID_AIRPTILE_ANIM_NEXT_FRAME;
 
diff --git a/src/newgrf_animation_base.h b/src/newgrf_animation_base.h
--- a/src/newgrf_animation_base.h
+++ b/src/newgrf_animation_base.h
@@ -23,9 +23,10 @@
  * @tparam Tbase       Instantiation of this class.
  * @tparam Tspec       NewGRF specification related to the animated tile.
  * @tparam Tobj        Object related to the animated tile.
+ * @tparam Textra      Custom extra callback data.
  * @tparam GetCallback The callback function pointer.
  */
-template <typename Tbase, typename Tspec, typename Tobj, uint16 (*GetCallback)(CallbackID callback, uint32 param1, uint32 param2, const Tspec *statspec, Tobj *st, TileIndex tile)>
+template <typename Tbase, typename Tspec, typename Tobj, typename Textra, uint16 (*GetCallback)(CallbackID callback, uint32 param1, uint32 param2, const Tspec *statspec, Tobj *st, TileIndex tile, Textra extra_data)>
 struct AnimationBase {
 	/**
 	 * Animate a single tile.
@@ -34,15 +35,16 @@
 	 * @param obj         Object related to the tile.
 	 * @param tile        Tile to animate changes for.
 	 * @param random_animation Whether to pass random bits to the "next frame" callback.
+	 * @param extra_data  Custom extra callback data.
 	 */
-	static void AnimateTile(const Tspec *spec, Tobj *obj, TileIndex tile, bool random_animation)
+	static void AnimateTile(const Tspec *spec, Tobj *obj, TileIndex tile, bool random_animation, Textra extra_data = 0)
 	{
 		assert(spec != NULL);
 
 		/* Acquire the animation speed from the NewGRF. */
 		uint8 animation_speed = spec->animation.speed;
 		if (HasBit(spec->callback_mask, Tbase::cbm_animation_speed)) {
-			uint16 callback = GetCallback(Tbase::cb_animation_speed, 0, 0, spec, obj, tile);
+			uint16 callback = GetCallback(Tbase::cb_animation_speed, 0, 0, spec, obj, tile, extra_data);
 			if (callback != CALLBACK_FAILED) animation_speed = Clamp(callback & 0xFF, 0, 16);
 		}
 
@@ -58,7 +60,7 @@
 		bool frame_set_by_callback = false;
 
 		if (HasBit(spec->callback_mask, Tbase::cbm_animation_next_frame)) {
-			uint16 callback = GetCallback(Tbase::cb_animation_next_frame, random_animation ? Random() : 0, 0, spec, obj, tile);
+			uint16 callback = GetCallback(Tbase::cb_animation_next_frame, random_animation ? Random() : 0, 0, spec, obj, tile, extra_data);
 
 			if (callback != CALLBACK_FAILED) {
 				frame_set_by_callback = true;
@@ -109,10 +111,11 @@
 	 * @param tile        Tile to consider animation changes for.
 	 * @param random_bits Random bits for this update. To be passed as parameter to the NewGRF.
 	 * @param trigger     What triggered this update? To be passed as parameter to the NewGRF.
+	 * @param extra_data  Custom extra data for callback processing.
 	 */
-	static void ChangeAnimationFrame(CallbackID cb, const Tspec *spec, Tobj *obj, TileIndex tile, uint32 random_bits, uint32 trigger)
+	static void ChangeAnimationFrame(CallbackID cb, const Tspec *spec, Tobj *obj, TileIndex tile, uint32 random_bits, uint32 trigger, Textra extra_data = 0)
 	{
-		uint16 callback = GetCallback(cb, random_bits, trigger, spec, obj, tile);
+		uint16 callback = GetCallback(cb, random_bits, trigger, spec, obj, tile, extra_data);
 		if (callback == CALLBACK_FAILED) return;
 
 		switch (callback & 0xFF) {
diff --git a/src/newgrf_house.cpp b/src/newgrf_house.cpp
--- a/src/newgrf_house.cpp
+++ b/src/newgrf_house.cpp
@@ -505,13 +505,13 @@
 }
 
 /* Simple wrapper for GetHouseCallback to keep the animation unified. */
-uint16 GetSimpleHouseCallback(CallbackID callback, uint32 param1, uint32 param2, const HouseSpec *spec, Town *town, TileIndex tile)
+uint16 GetSimpleHouseCallback(CallbackID callback, uint32 param1, uint32 param2, const HouseSpec *spec, Town *town, TileIndex tile, uint32 extra_data)
 {
 	return GetHouseCallback(callback, param1, param2, spec - HouseSpec::Get(0), town, tile);
 }
 
 /** Helper class for animation control. */
-struct HouseAnimationBase : public AnimationBase<HouseAnimationBase, HouseSpec, Town, GetSimpleHouseCallback> {
+struct HouseAnimationBase : public AnimationBase<HouseAnimationBase, HouseSpec, Town, uint32, GetSimpleHouseCallback> {
 	static const CallbackID cb_animation_speed      = CBID_HOUSE_ANIMATION_SPEED;
 	static const CallbackID cb_animation_next_frame = CBID_HOUSE_ANIMATION_NEXT_FRAME;
 
diff --git a/src/newgrf_industrytiles.cpp b/src/newgrf_industrytiles.cpp
--- a/src/newgrf_industrytiles.cpp
+++ b/src/newgrf_industrytiles.cpp
@@ -307,13 +307,13 @@
 }
 
 /* Simple wrapper for GetHouseCallback to keep the animation unified. */
-uint16 GetSimpleIndustryCallback(CallbackID callback, uint32 param1, uint32 param2, const IndustryTileSpec *spec, Industry *ind, TileIndex tile)
+uint16 GetSimpleIndustryCallback(CallbackID callback, uint32 param1, uint32 param2, const IndustryTileSpec *spec, Industry *ind, TileIndex tile, int extra_data)
 {
 	return GetIndustryTileCallback(callback, param1, param2, spec - GetIndustryTileSpec(0), ind, tile);
 }
 
 /** Helper class for animation control. */
-struct IndustryAnimationBase : public AnimationBase<IndustryAnimationBase, IndustryTileSpec, Industry, GetSimpleIndustryCallback> {
+struct IndustryAnimationBase : public AnimationBase<IndustryAnimationBase, IndustryTileSpec, Industry, int, GetSimpleIndustryCallback> {
 	static const CallbackID cb_animation_speed      = CBID_INDTILE_ANIMATION_SPEED;
 	static const CallbackID cb_animation_next_frame = CBID_INDTILE_ANIM_NEXT_FRAME;
 
diff --git a/src/newgrf_object.cpp b/src/newgrf_object.cpp
--- a/src/newgrf_object.cpp
+++ b/src/newgrf_object.cpp
@@ -521,15 +521,16 @@
  * @param spec     The specification of the object / the entry point.
  * @param o        The object to call the callback for.
  * @param tile     The tile the callback is called for.
+ * @param extra_data Ignored.
  * @return The result of the callback.
  */
-uint16 StubGetObjectCallback(CallbackID callback, uint32 param1, uint32 param2, const ObjectSpec *spec, Object *o, TileIndex tile)
+uint16 StubGetObjectCallback(CallbackID callback, uint32 param1, uint32 param2, const ObjectSpec *spec, Object *o, TileIndex tile, int extra_data)
 {
 	return GetObjectCallback(callback, param1, param2, spec, o, tile);
 }
 
 /** Helper class for animation control. */
-struct ObjectAnimationBase : public AnimationBase<ObjectAnimationBase, ObjectSpec, Object, StubGetObjectCallback> {
+struct ObjectAnimationBase : public AnimationBase<ObjectAnimationBase, ObjectSpec, Object, int, StubGetObjectCallback> {
 	static const CallbackID cb_animation_speed      = CBID_OBJECT_ANIMATION_SPEED;
 	static const CallbackID cb_animation_next_frame = CBID_OBJECT_ANIMATION_NEXT_FRAME;
 
diff --git a/src/newgrf_station.cpp b/src/newgrf_station.cpp
--- a/src/newgrf_station.cpp
+++ b/src/newgrf_station.cpp
@@ -908,8 +908,14 @@
 			!HasBit(statspec->wires, GetStationGfx(tile));
 }
 
+/** Wrapper for animation control, see #GetStationCallback. */
+uint16 GetAnimStationCallback(CallbackID callback, uint32 param1, uint32 param2, const StationSpec *statspec, BaseStation *st, TileIndex tile, int extra_data)
+{
+	return GetStationCallback(callback, param1, param2, statspec, st, tile);
+}
+
 /** Helper class for animation control. */
-struct StationAnimationBase : public AnimationBase<StationAnimationBase, StationSpec, BaseStation, GetStationCallback> {
+struct StationAnimationBase : public AnimationBase<StationAnimationBase, StationSpec, BaseStation, int, GetAnimStationCallback> {
 	static const CallbackID cb_animation_speed      = CBID_STATION_ANIMATION_SPEED;
 	static const CallbackID cb_animation_next_frame = CBID_STATION_ANIM_NEXT_FRAME;