(svn r19195) -Codechange: actually draw newgrf airport tiles

1 files changed, 225 insertions, 0 deletions

diff --git a/src/newgrf_airporttiles.cpp b/src/newgrf_airporttiles.cpp
index 0eda02e1a..c1327bd43 100644
--- a/src/newgrf_airporttiles.cpp
+++ b/src/newgrf_airporttiles.cpp
@@ -10,9 +10,17 @@
 /** @file newgrf_airporttiles.cpp NewGRF handling of airport tiles. */
 
 #include "stdafx.h"
+#include "debug.h"
 #include "airport.h"
 #include "newgrf.h"
 #include "newgrf_airporttiles.h"
+#include "newgrf_spritegroup.h"
+#include "station_base.h"
+#include "water.h"
+#include "viewport_func.h"
+#include "landscape.h"
+#include "company_base.h"
+#include "town.h"
 #include "table/airporttiles.h"
 
 
@@ -67,3 +75,220 @@ void AirportTileOverrideManager::SetEntitySpec(const AirportTileSpec *airpts)
 	}
 }
 
+/**
+ * Do airporttile gfx ID translation for NewGRFs.
+ * @param gfx the type to get the override for.
+ * @return the gfx to actually work with.
+ */
+StationGfx GetTranslatedAirportTileID(StationGfx gfx)
+{
+	assert(gfx < NUM_AIRPORTTILES);
+	const AirportTileSpec *it = AirportTileSpec::Get(gfx);
+	return it->grf_prop.override == INVALID_AIRPORTTILE ? gfx : it->grf_prop.override;
+}
+
+
+static const SpriteGroup *AirportTileResolveReal(const ResolverObject *object, const RealSpriteGroup *group)
+{
+	/* AirportTile do not have 'real' groups. */
+	return NULL;
+}
+
+/**
+ * Based on newhouses/newindustries equivalent, but adapted for airports.
+ * @param parameter from callback. It's in fact a pair of coordinates
+ * @param tile TileIndex from which the callback was initiated
+ * @param index of the industry been queried for
+ * @return a construction of bits obeying the newgrf format
+ */
+uint32 GetNearbyAirportTileInformation(byte parameter, TileIndex tile, StationID index)
+{
+	if (parameter != 0) tile = GetNearbyTile(parameter, tile); // only perform if it is required
+	bool is_same_airport = (IsTileType(tile, MP_STATION) && IsAirport(tile) && GetStationIndex(tile) == index);
+
+	return GetNearbyTileInformation(tile) | (is_same_airport ? 1 : 0) << 8;
+}
+
+
+/**
+ * Make an analysis of a tile and check whether it belongs to the same
+ * airport, and/or the same grf file
+ * @param tile TileIndex of the tile to query
+ * @param st Station to which to compare the tile to
+ * @param cur_grfid GRFID of the current callback
+ * @return value encoded as per NFO specs
+ */
+static uint32 GetAirportTileIDAtOffset(TileIndex tile, const Station *st, uint32 cur_grfid)
+{
+	if (!st->TileBelongsToAirport(tile)) {
+		return 0xFFFF;
+	}
+
+	/* Don't use GetAirportGfx here as we want the original (not overriden)
+	 * graphics id. */
+	StationGfx gfx = GetStationGfx(tile);
+	const AirportTileSpec *ats = AirportTileSpec::Get(gfx);
+
+	if (gfx < NEW_AIRPORTTILE_OFFSET) { // Does it belongs to an old type?
+		/* It is an old tile.  We have to see if it's been overriden */
+		if (ats->grf_prop.override == INVALID_AIRPORTTILE) { // has it been overridden?
+			return 0xFF << 8 | gfx; // no. Tag FF + the gfx id of that tile
+		}
+		/* Overriden */
+		const AirportTileSpec *tile_ovr = AirportTileSpec::Get(ats->grf_prop.override);
+
+		if (tile_ovr->grf_prop.grffile->grfid == cur_grfid) {
+			return tile_ovr->grf_prop.local_id; // same grf file
+		} else {
+			return 0xFFFE; // not the same grf file
+		}
+	}
+	/* Not an 'old type' tile */
+	if (ats->grf_prop.spritegroup != NULL) { // tile has a spritegroup ?
+		if (ats->grf_prop.grffile->grfid == cur_grfid) { // same airport, same grf ?
+			return ats->grf_prop.local_id;
+		} else {
+			return 0xFFFE; // Defined in another grf file
+		}
+	}
+	/* The tile has no spritegroup */
+	return 0xFF << 8 | ats->grf_prop.subst_id; // so just give him the substitute
+}
+
+static uint32 AirportTileGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)
+{
+	const Station *st = object->u.airport.st;
+	TileIndex tile    = object->u.airport.tile;
+	assert(st != NULL);
+
+	if (object->scope == VSG_SCOPE_PARENT) {
+		DEBUG(grf, 1, "Parent scope for airport tiles unavailable");
+		*available = false;
+		return UINT_MAX;
+	}
+
+	extern uint32 GetRelativePosition(TileIndex tile, TileIndex ind_tile);
+
+	switch (variable) {
+		/* Terrain type */
+		case 0x41: return GetTerrainType(tile);
+
+		/* Current town zone of the tile in the nearest town */
+		case 0x42: return GetTownRadiusGroup(ClosestTownFromTile(tile, UINT_MAX), tile);
+
+		/* Position relative to most northern airport tile. */
+		case 0x43: return GetRelativePosition(tile, st->airport_tile);
+
+		/* Animation frame of tile */
+		case 0x44: return GetStationAnimationFrame(tile);
+
+		/* Land info of nearby tiles */
+		case 0x60: return GetNearbyAirportTileInformation(parameter, tile, st->index);
+
+		/* Animation stage of nearby tiles */
+		case 0x61:
+			tile = GetNearbyTile(parameter, tile);
+			if (st->TileBelongsToAirport(tile)) {
+				return GetStationAnimationFrame(tile);
+			}
+			return UINT_MAX;
+
+		/* Get airport tile ID at offset */
+		case 0x62: return GetAirportTileIDAtOffset(GetNearbyTile(parameter, tile), st, object->grffile->grfid);
+	}
+
+	DEBUG(grf, 1, "Unhandled airport tile property 0x%X", variable);
+
+	*available = false;
+	return UINT_MAX;
+}
+
+static void AirportTileResolver(ResolverObject *res, StationGfx gfx, TileIndex tile, Station *st)
+{
+	res->GetRandomBits = NULL;
+	res->GetTriggers   = NULL;
+	res->SetTriggers   = NULL;
+	res->GetVariable   = AirportTileGetVariable;
+	res->ResolveReal   = AirportTileResolveReal;
+
+	assert(st != NULL);
+	res->psa                  = NULL;
+	res->u.airport.airport_id = st->airport_type;
+	res->u.airport.st         = st;
+	res->u.airport.tile       = tile;
+
+	res->callback        = CBID_NO_CALLBACK;
+	res->callback_param1 = 0;
+	res->callback_param2 = 0;
+	res->last_value      = 0;
+	res->trigger         = 0;
+	res->reseed          = 0;
+	res->count           = 0;
+
+	const AirportTileSpec *ats = AirportTileSpec::Get(gfx);
+	res->grffile         = ats->grf_prop.grffile;
+}
+
+uint16 GetAirportTileCallback(CallbackID callback, uint32 param1, uint32 param2, StationGfx gfx_id, Station *st, TileIndex tile)
+{
+	ResolverObject object;
+	const SpriteGroup *group;
+
+	AirportTileResolver(&object, gfx_id, tile, st);
+	object.callback = callback;
+	object.callback_param1 = param1;
+	object.callback_param2 = param2;
+
+	group = SpriteGroup::Resolve(AirportTileSpec::Get(gfx_id)->grf_prop.spritegroup, &object);
+	if (group == NULL) return CALLBACK_FAILED;
+
+	return group->GetCallbackResult();
+}
+
+static void AirportDrawTileLayout(const TileInfo *ti, const TileLayoutSpriteGroup *group, byte colour, StationGfx gfx)
+{
+	const DrawTileSprites *dts = group->dts;
+
+	SpriteID image = dts->ground.sprite;
+	SpriteID pal   = dts->ground.pal;
+
+	if (GB(image, 0, SPRITE_WIDTH) != 0) {
+		if (image == SPR_FLAT_WATER_TILE && GetWaterClass(ti->tile) != WATER_CLASS_INVALID) {
+			DrawWaterClassGround(ti);
+		} else {
+			DrawGroundSprite(image, GroundSpritePaletteTransform(image, pal, GENERAL_SPRITE_COLOUR(colour)));
+		}
+	}
+
+	DrawNewGRFTileSeq(ti, dts, TO_BUILDINGS, 0, GENERAL_SPRITE_COLOUR(colour));
+}
+
+bool DrawNewAirportTile(TileInfo *ti, Station *st, StationGfx gfx, const AirportTileSpec *airts)
+{
+	const SpriteGroup *group;
+	ResolverObject object;
+
+	if (ti->tileh != SLOPE_FLAT) {
+		bool draw_old_one = true;
+		if (HasBit(airts->callback_flags, CBM_AIRT_DRAW_FOUNDATIONS)) {
+			/* Called to determine the type (if any) of foundation to draw */
+			uint32 callback_res = GetAirportTileCallback(CBID_AIRPTILE_DRAW_FOUNDATIONS, 0, 0, gfx, st, ti->tile);
+			draw_old_one = (callback_res != 0);
+		}
+
+		if (draw_old_one) DrawFoundation(ti, FOUNDATION_LEVELED);
+	}
+
+	AirportTileResolver(&object, gfx, ti->tile, st);
+
+	group = SpriteGroup::Resolve(airts->grf_prop.spritegroup, &object);
+	if (group == NULL || group->type != SGT_TILELAYOUT) {
+		return false;
+	}
+
+	const TileLayoutSpriteGroup *tlgroup = (const TileLayoutSpriteGroup *)group;
+	AirportDrawTileLayout(ti, tlgroup, Company::Get(st->owner)->colour, gfx);
+	return true;
+}
+
+