# HG changeset patch
# User yexo <yexo@openttd.org>
# Date 1266848148 0
# Node ID 3b8f660a561d28725333d0a97e1866ae9db8f56a
# Parent  a8c743a707e67b1d59929f27a48ac0d37f973bf0
(svn r19193) -Codechange: increase the maximum number of airport tiles to 256 and introduce AirportTileOverrideManager

diff --git a/src/airport.h b/src/airport.h
--- a/src/airport.h
+++ b/src/airport.h
@@ -16,12 +16,14 @@
 #include "map_type.h"
 #include "date_type.h"
 
-/** Current limits for airports */
+/** Some airport-related constants */
 enum {
-	MAX_TERMINALS =  10, ///< maximum number of terminals per airport
-	MAX_HELIPADS  =   4, ///< maximum number of helipads per airport
-	MAX_ELEMENTS  = 255, ///< maximum number of aircraft positions at airport
-	NUM_AIRPORTTILES = 74, ///< total number of airport tiles
+	MAX_TERMINALS =  10,                    ///< maximum number of terminals per airport
+	MAX_HELIPADS  =   4,                    ///< maximum number of helipads per airport
+	MAX_ELEMENTS  = 255,                    ///< maximum number of aircraft positions at airport
+	NUM_AIRPORTTILES = 256,                 ///< total number of airport tiles
+	NEW_AIRPORTTILE_OFFSET = 74,            ///< offset of first newgrf airport tile
+	INVALID_AIRPORTTILE = NUM_AIRPORTTILES, ///< id for an invalid airport tile
 };
 
 /** Airport types */
diff --git a/src/industrytype.h b/src/industrytype.h
--- a/src/industrytype.h
+++ b/src/industrytype.h
@@ -19,6 +19,7 @@
 #include "landscape_type.h"
 #include "strings_type.h"
 #include "cargo_type.h"
+#include "newgrf_commons.h"
 
 enum {
 	CLEAN_RANDOMSOUNDS,    ///< Free the dynamically allocated sounds table
@@ -94,15 +95,6 @@
 	IndustryGfx gfx;
 };
 
-/** Data related to the handling of grf files.  Common to both industry and industry tile */
-struct GRFFileProps {
-	uint16 subst_id;
-	uint16 local_id;                      ///< id defined by the grf file for this industry
-	struct SpriteGroup *spritegroup;      ///< pointer to the different sprites of the industry
-	const struct GRFFile *grffile;        ///< grf file that introduced this industry
-	uint16 override;                      ///< id of the entity been replaced by
-};
-
 /**
  * Defines the data structure for constructing industry.
  */
diff --git a/src/newgrf.cpp b/src/newgrf.cpp
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -35,6 +35,7 @@
 #include "newgrf_commons.h"
 #include "newgrf_townname.h"
 #include "newgrf_industries.h"
+#include "newgrf_airporttiles.h"
 #include "rev.h"
 #include "fios.h"
 #include "rail.h"
@@ -5768,6 +5769,9 @@
 	ResetStationClasses();
 	ResetCustomStations();
 
+	/* Reset airport-related structures */
+	AirportTileSpec::ResetAirportTiles();
+
 	/* Reset canal sprite groups and flags */
 	memset(_water_feature, 0, sizeof(_water_feature));
 
diff --git a/src/newgrf_airporttiles.cpp b/src/newgrf_airporttiles.cpp
--- a/src/newgrf_airporttiles.cpp
+++ b/src/newgrf_airporttiles.cpp
@@ -11,10 +11,15 @@
 
 #include "stdafx.h"
 #include "airport.h"
+#include "newgrf.h"
 #include "newgrf_airporttiles.h"
 #include "table/airporttiles.h"
 
 
+AirportTileSpec AirportTileSpec::tiles[NUM_AIRPORTTILES];
+
+AirportTileOverrideManager _airporttile_mngr(NEW_AIRPORTTILE_OFFSET, NUM_AIRPORTTILES, INVALID_AIRPORTTILE);
+
 /**
  * Retrieve airport tile spec for the given airport tile
  * @param gfx index of airport tile
@@ -22,8 +27,43 @@
  */
 /* static */ const AirportTileSpec *AirportTileSpec::Get(StationGfx gfx)
 {
-	assert(gfx < NUM_AIRPORTTILES);
-	extern const AirportTileSpec _origin_airporttile_specs[];
-	return &_origin_airporttile_specs[gfx];
+	assert(gfx < lengthof(AirportTileSpec::tiles));
+	return &AirportTileSpec::tiles[gfx];
+}
+
+/**
+ * This function initializes the tile array of AirportTileSpec
+ */
+void AirportTileSpec::ResetAirportTiles()
+{
+	memset(&AirportTileSpec::tiles, 0, sizeof(AirportTileSpec::tiles));
+	memcpy(&AirportTileSpec::tiles, &_origin_airporttile_specs, sizeof(_origin_airporttile_specs));
+
+	/* Reset any overrides that have been set. */
+	_airporttile_mngr.ResetOverride();
 }
 
+void AirportTileOverrideManager::SetEntitySpec(const AirportTileSpec *airpts)
+{
+	StationGfx airpt_id = this->AddEntityID(airpts->grf_prop.local_id, airpts->grf_prop.grffile->grfid, airpts->grf_prop.subst_id);
+
+	if (airpt_id == invalid_ID) {
+		grfmsg(1, "AirportTile.SetEntitySpec: Too many airport tiles allocated. Ignoring.");
+		return;
+	}
+
+	memcpy(&AirportTileSpec::tiles[airpt_id], airpts, sizeof(*airpts));
+
+	/* Now add the overrides. */
+	for (int i = 0; i < max_offset; i++) {
+		AirportTileSpec *overridden_airpts = &AirportTileSpec::tiles[i];
+
+		if (entity_overrides[i] != airpts->grf_prop.local_id || grfid_overrides[i] != airpts->grf_prop.grffile->grfid) continue;
+
+		overridden_airpts->grf_prop.override = airpt_id;
+		overridden_airpts->enabled = false;
+		entity_overrides[i] = invalid_ID;
+		grfid_overrides[i] = 0;
+	}
+}
+
diff --git a/src/newgrf_airporttiles.h b/src/newgrf_airporttiles.h
--- a/src/newgrf_airporttiles.h
+++ b/src/newgrf_airporttiles.h
@@ -13,6 +13,8 @@
 #define NEWGRF_AIRPORTTILES_H
 
 #include "station_map.h"
+#include "newgrf_commons.h"
+#include "airport.h"
 
 /**
  * Defines the data structure of each indivudual tile of an airport.
@@ -21,7 +23,17 @@
 	uint16 animation_info;                ///< Information about the animation (is it looping, how many loops etc)
 	uint8 animation_speed;                ///< The speed of the animation
 
+	bool enabled;                         ///< entity still available (by default true). newgrf can disable it, though
+	GRFFileProps grf_prop;                ///< properties related the the grf file
+
 	static const AirportTileSpec *Get(StationGfx gfx);
+
+	static void ResetAirportTiles();
+
+private:
+	static AirportTileSpec tiles[NUM_AIRPORTTILES];
+
+	friend void AirportTileOverrideManager::SetEntitySpec(const AirportTileSpec *airpts);
 };
 
 #endif /* NEWGRF_AIRPORTTILES_H */
diff --git a/src/newgrf_commons.h b/src/newgrf_commons.h
--- a/src/newgrf_commons.h
+++ b/src/newgrf_commons.h
@@ -97,12 +97,33 @@
 	void SetEntitySpec(const IndustryTileSpec *indts);
 };
 
+struct AirportTileSpec;
+class AirportTileOverrideManager : public OverrideManagerBase {
+protected:
+	virtual bool CheckValidNewID(uint16 testid) { return testid != 0xFF; }
+public:
+	AirportTileOverrideManager(uint16 offset, uint16 maximum, uint16 invalid) :
+			OverrideManagerBase(offset, maximum, invalid) {}
+
+	void SetEntitySpec(const AirportTileSpec *ats);
+};
+
 extern HouseOverrideManager _house_mngr;
 extern IndustryOverrideManager _industry_mngr;
 extern IndustryTileOverrideManager _industile_mngr;
+extern AirportTileOverrideManager _airporttile_mngr;
 
 uint32 GetTerrainType(TileIndex tile);
 TileIndex GetNearbyTile(byte parameter, TileIndex tile);
 uint32 GetNearbyTileInformation(TileIndex tile);
 
+/** Data related to the handling of grf files. */
+struct GRFFileProps {
+	uint16 subst_id;
+	uint16 local_id;                      ///< id defined by the grf file for this entity
+	struct SpriteGroup *spritegroup;      ///< pointer to the different sprites of the entity
+	const struct GRFFile *grffile;        ///< grf file that introduced this entity
+	uint16 override;                      ///< id of the entity been replaced by
+};
+
 #endif /* NEWGRF_COMMONS_H */
diff --git a/src/table/airporttiles.h b/src/table/airporttiles.h
--- a/src/table/airporttiles.h
+++ b/src/table/airporttiles.h
@@ -13,7 +13,7 @@
 #define AIRPORTTILES_H
 
 /** Writes all airport tile properties in the AirportTile struct */
-#define AT(num_frames, anim_speed) {(1 << 8) | num_frames, anim_speed}
+#define AT(num_frames, anim_speed) {(1 << 8) | num_frames, anim_speed, true, {INVALID_AIRPORTTILE, 0, NULL, NULL, INVALID_AIRPORTTILE}}
 /** Writes an airport tile without animation in the AirportTile struct */
 #define AT_NOANIM {0xFFFF, 2}
 
@@ -104,7 +104,7 @@
 	AT(4, 1), // APT_GRASS_FENCE_NE_FLAG_2
 };
 
-assert_compile(NUM_AIRPORTTILES == lengthof(_origin_airporttile_specs));
+assert_compile(NEW_AIRPORTTILE_OFFSET == lengthof(_origin_airporttile_specs));
 
 #undef AT_NOANIM
 #undef AT