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(svn r24680) -Codechange: Add resolver classes for canals.

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alberth 2012-11-10 20:39:11 +00:00
parent 818332f3e8
commit bc123873cf
2 changed files with 51 additions and 63 deletions
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111
src/newgrf_canal.cpp
View File

@ -15,50 +15,58 @@
#include "newgrf_canal.h"
#include "water_map.h"
/** Table of canal 'feature' sprite groups */
WaterFeature _water_feature[CF_END];
struct CanalScopeResolver : public ScopeResolver {
TileIndex tile;
/* Random bits and triggers are not supported for canals, so the following
* three functions are stubs. */
static uint32 CanalGetRandomBits(const ResolverObject *object)
CanalScopeResolver(ResolverObject *ro, TileIndex tile);
/* virtual */ uint32 GetRandomBits() const;
/* virtual */ uint32 GetVariable(byte variable, uint32 parameter, bool *available) const;
};
/** Resolver object for canals. */
struct CanalResolverObject : public ResolverObject {
CanalScopeResolver canal_scope;
CanalResolverObject(const GRFFile *grffile, TileIndex tile,
CallbackID callback = CBID_NO_CALLBACK, uint32 callback_param1 = 0, uint32 callback_param2 = 0);
/* virtual */ ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0)
{
switch (scope) {
case VSG_SCOPE_SELF: return &this->canal_scope;
default: return &this->default_scope; // XXX ResolverObject::GetScope(scope, relative);
}
}
/* virtual */ const SpriteGroup *ResolveReal(const RealSpriteGroup *group) const;
};
/* virtual */ uint32 CanalScopeResolver::GetRandomBits() const
{
/* Return random bits only for water tiles, not station tiles */
return IsTileType(object->u.canal.tile, MP_WATER) ? GetWaterTileRandomBits(object->u.canal.tile) : 0;
return IsTileType(this->tile, MP_WATER) ? GetWaterTileRandomBits(this->tile) : 0;
}
static uint32 CanalGetTriggers(const ResolverObject *object)
/* virtual */ uint32 CanalScopeResolver::GetVariable(byte variable, uint32 parameter, bool *available) const
{
return 0;
}
static void CanalSetTriggers(const ResolverObject *object, int triggers)
{
return;
}
static uint32 CanalGetVariable(const ResolverObject *object, byte variable, uint32 parameter, bool *available)
{
TileIndex tile = object->u.canal.tile;
switch (variable) {
/* Height of tile */
case 0x80: {
int z = GetTileZ(tile);
int z = GetTileZ(this->tile);
/* Return consistent height within locks */
if (IsTileType(tile, MP_WATER) && IsLock(tile) && GetLockPart(tile) == LOCK_PART_UPPER) z--;
if (IsTileType(this->tile, MP_WATER) && IsLock(this->tile) && GetLockPart(this->tile) == LOCK_PART_UPPER) z--;
return z;
}
/* Terrain type */
case 0x81: return GetTerrainType(tile);
case 0x81: return GetTerrainType(this->tile);
/* Random data for river or canal tiles, otherwise zero */
case 0x83: return IsTileType(tile, MP_WATER) ? GetWaterTileRandomBits(tile) : 0;
case 0x83: return IsTileType(this->tile, MP_WATER) ? GetWaterTileRandomBits(this->tile) : 0;
}
DEBUG(grf, 1, "Unhandled canal variable 0x%02X", variable);
@ -68,47 +76,38 @@ static uint32 CanalGetVariable(const ResolverObject *object, byte variable, uint
}
static const SpriteGroup *CanalResolveReal(const ResolverObject *object, const RealSpriteGroup *group)
/* virtual */ const SpriteGroup *CanalResolverObject::ResolveReal(const RealSpriteGroup *group) const
{
if (group->num_loaded == 0) return NULL;
return group->loaded[0];
}
static void NewCanalResolver(ResolverObject *res, TileIndex tile, const GRFFile *grffile)
CanalScopeResolver::CanalScopeResolver(ResolverObject *ro, TileIndex tile) : ScopeResolver(ro)
{
res->GetRandomBits = &CanalGetRandomBits;
res->GetTriggers = &CanalGetTriggers;
res->SetTriggers = &CanalSetTriggers;
res->GetVariable = &CanalGetVariable;
res->ResolveRealMethod = &CanalResolveReal;
res->u.canal.tile = tile;
res->callback = CBID_NO_CALLBACK;
res->callback_param1 = 0;
res->callback_param2 = 0;
res->ResetState();
res->grffile = grffile;
this->tile = tile;
}
/**
* @param tile Tile index of canal.
* @param grffile Grf file.
*/
CanalResolverObject::CanalResolverObject(const GRFFile *grffile, TileIndex tile,
CallbackID callback, uint32 callback_param1, uint32 callback_param2)
: ResolverObject(grffile, callback, callback_param1, callback_param2), canal_scope(this, tile)
{
}
/**
* Lookup the base sprite to use for a canal.
* @param feature Which canal feature we want.
* @param tile Tile index of canal, if appropriate.
* @return Base sprite returned by GRF, or 0 if none.
* @return Base sprite returned by GRF, or \c 0 if none.
*/
SpriteID GetCanalSprite(CanalFeature feature, TileIndex tile)
{
ResolverObject object;
const SpriteGroup *group;
NewCanalResolver(&object, tile, _water_feature[feature].grffile);
group = SpriteGroup::Resolve(_water_feature[feature].group, &object);
CanalResolverObject object(_water_feature[feature].grffile, tile);
const SpriteGroup *group = SpriteGroup::Resolve(_water_feature[feature].group, &object);
if (group == NULL) return 0;
return group->GetResult();
@ -121,20 +120,12 @@ SpriteID GetCanalSprite(CanalFeature feature, TileIndex tile)
* @param param2 Callback parameter 2.
* @param feature For which feature to run the callback.
* @param tile Tile index of canal.
* @return Callback result or CALLBACK_FAILED if the callback failed.
* @return Callback result or #CALLBACK_FAILED if the callback failed.
*/
static uint16 GetCanalCallback(CallbackID callback, uint32 param1, uint32 param2, CanalFeature feature, TileIndex tile)
{
ResolverObject object;
const SpriteGroup *group;
NewCanalResolver(&object, tile, _water_feature[feature].grffile);
object.callback = callback;
object.callback_param1 = param1;
object.callback_param2 = param2;
group = SpriteGroup::Resolve(_water_feature[feature].group, &object);
CanalResolverObject object(_water_feature[feature].grffile, tile, callback, param1, param2);
const SpriteGroup *group = SpriteGroup::Resolve(_water_feature[feature].group, &object);
if (group == NULL) return CALLBACK_FAILED;
return group->GetCallbackResult();

3
src/newgrf_spritegroup.h
View File

@ -357,9 +357,6 @@ struct ResolverObject {
EngineID self_type;
bool info_view; ///< Indicates if the item is being drawn in an info window
} vehicle;
struct {
TileIndex tile;
} canal;
struct {
TileIndex tile;
struct BaseStation *st;