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00012 #include "stdafx.h"
00013 #include "debug.h"
00014 #include "newgrf_spritegroup.h"
00015 #include "newgrf_canal.h"
00016 #include "water_map.h"
00017
00019 WaterFeature _water_feature[CF_END];
00020
00022 struct CanalScopeResolver : public ScopeResolver {
00023 TileIndex tile;
00024
00025 CanalScopeResolver(ResolverObject *ro, TileIndex tile);
00026
00027 uint32 GetRandomBits() const;
00028 uint32 GetVariable(byte variable, uint32 parameter, bool *available) const;
00029 };
00030
00032 struct CanalResolverObject : public ResolverObject {
00033 CanalScopeResolver canal_scope;
00034
00035 CanalResolverObject(const GRFFile *grffile, TileIndex tile,
00036 CallbackID callback = CBID_NO_CALLBACK, uint32 callback_param1 = 0, uint32 callback_param2 = 0);
00037
00038 ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0)
00039 {
00040 switch (scope) {
00041 case VSG_SCOPE_SELF: return &this->canal_scope;
00042 default: return ResolverObject::GetScope(scope, relative);
00043 }
00044 }
00045
00046 const SpriteGroup *ResolveReal(const RealSpriteGroup *group) const;
00047 };
00048
00049 uint32 CanalScopeResolver::GetRandomBits() const
00050 {
00051
00052 return IsTileType(this->tile, MP_WATER) ? GetWaterTileRandomBits(this->tile) : 0;
00053 }
00054
00055 uint32 CanalScopeResolver::GetVariable(byte variable, uint32 parameter, bool *available) const
00056 {
00057 switch (variable) {
00058
00059 case 0x80: {
00060 int z = GetTileZ(this->tile);
00061
00062 if (IsTileType(this->tile, MP_WATER) && IsLock(this->tile) && GetLockPart(this->tile) == LOCK_PART_UPPER) z--;
00063 return z;
00064 }
00065
00066
00067 case 0x81: return GetTerrainType(this->tile);
00068
00069
00070 case 0x83: return IsTileType(this->tile, MP_WATER) ? GetWaterTileRandomBits(this->tile) : 0;
00071 }
00072
00073 DEBUG(grf, 1, "Unhandled canal variable 0x%02X", variable);
00074
00075 *available = false;
00076 return UINT_MAX;
00077 }
00078
00079
00080 const SpriteGroup *CanalResolverObject::ResolveReal(const RealSpriteGroup *group) const
00081 {
00082 if (group->num_loaded == 0) return NULL;
00083
00084 return group->loaded[0];
00085 }
00086
00087 CanalScopeResolver::CanalScopeResolver(ResolverObject *ro, TileIndex tile) : ScopeResolver(ro)
00088 {
00089 this->tile = tile;
00090 }
00091
00100 CanalResolverObject::CanalResolverObject(const GRFFile *grffile, TileIndex tile,
00101 CallbackID callback, uint32 callback_param1, uint32 callback_param2)
00102 : ResolverObject(grffile, callback, callback_param1, callback_param2), canal_scope(this, tile)
00103 {
00104 }
00105
00112 SpriteID GetCanalSprite(CanalFeature feature, TileIndex tile)
00113 {
00114 CanalResolverObject object(_water_feature[feature].grffile, tile);
00115 const SpriteGroup *group = SpriteGroup::Resolve(_water_feature[feature].group, &object);
00116 if (group == NULL) return 0;
00117
00118 return group->GetResult();
00119 }
00120
00130 static uint16 GetCanalCallback(CallbackID callback, uint32 param1, uint32 param2, CanalFeature feature, TileIndex tile)
00131 {
00132 CanalResolverObject object(_water_feature[feature].grffile, tile, callback, param1, param2);
00133 const SpriteGroup *group = SpriteGroup::Resolve(_water_feature[feature].group, &object);
00134 if (group == NULL) return CALLBACK_FAILED;
00135
00136 return group->GetCallbackResult();
00137 }
00138
00146 uint GetCanalSpriteOffset(CanalFeature feature, TileIndex tile, uint cur_offset)
00147 {
00148 if (HasBit(_water_feature[feature].callback_mask, CBM_CANAL_SPRITE_OFFSET)) {
00149 uint16 cb = GetCanalCallback(CBID_CANALS_SPRITE_OFFSET, cur_offset, 0, feature, tile);
00150 if (cb != CALLBACK_FAILED) return cur_offset + cb;
00151 }
00152 return cur_offset;
00153 }