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/*
Minetest-c55
Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef TILE_HEADER
#define TILE_HEADER
#include "common_irrlicht.h"
#include "threads.h"
#include "utility.h"
#include <string>
class IGameDef;
/*
tile.{h,cpp}: Texture handling stuff.
*/
/*
Gets the path to a texture by first checking if the texture exists
in texture_path and if not, using the data path.
Checks all supported extensions by replacing the original extension.
If not found, returns "".
Utilizes a thread-safe cache.
*/
std::string getTexturePath(const std::string &filename);
/*
Specifies a texture in an atlas.
This is used to specify single textures also.
This has been designed to be small enough to be thrown around a lot.
*/
struct AtlasPointer
{
u32 id; // Texture id
video::ITexture *atlas; // Atlas in where the texture is
v2f pos; // Position in atlas
v2f size; // Size in atlas
u16 tiled; // X-wise tiling count. If 0, width of atlas is width of image.
AtlasPointer(
u16 id_,
video::ITexture *atlas_=NULL,
v2f pos_=v2f(0,0),
v2f size_=v2f(1,1),
u16 tiled_=1
):
id(id_),
atlas(atlas_),
pos(pos_),
size(size_),
tiled(tiled_)
{
}
bool operator==(const AtlasPointer &other)
{
return (
id == other.id
);
/*return (
id == other.id &&
atlas == other.atlas &&
pos == other.pos &&
size == other.size &&
tiled == other.tiled
);*/
}
float x0(){ return pos.X; }
float x1(){ return pos.X + size.X; }
float y0(){ return pos.Y; }
float y1(){ return pos.Y + size.Y; }
};
/*
TextureSource creates and caches textures.
*/
class ITextureSource
{
public:
ITextureSource(){}
virtual ~ITextureSource(){}
virtual u32 getTextureId(const std::string &name){return 0;}
virtual u32 getTextureIdDirect(const std::string &name){return 0;}
virtual std::string getTextureName(u32 id){return "";}
virtual AtlasPointer getTexture(u32 id){return AtlasPointer(0);}
virtual AtlasPointer getTexture(const std::string &name)
{return AtlasPointer(0);}
virtual video::ITexture* getTextureRaw(const std::string &name)
{return NULL;}
virtual void updateAP(AtlasPointer &ap){};
};
class IWritableTextureSource : public ITextureSource
{
public:
IWritableTextureSource(){}
virtual ~IWritableTextureSource(){}
virtual u32 getTextureId(const std::string &name){return 0;}
virtual u32 getTextureIdDirect(const std::string &name){return 0;}
virtual std::string getTextureName(u32 id){return "";}
virtual AtlasPointer getTexture(u32 id){return AtlasPointer(0);}
virtual AtlasPointer getTexture(const std::string &name)
{return AtlasPointer(0);}
virtual video::ITexture* getTextureRaw(const std::string &name)
{return NULL;}
virtual void updateAP(AtlasPointer &ap){};
virtual void processQueue()=0;
virtual void insertSourceImage(const std::string &name, video::IImage *img)=0;
virtual void rebuildImagesAndTextures()=0;
virtual void buildMainAtlas(class IGameDef *gamedef)=0;
};
IWritableTextureSource* createTextureSource(IrrlichtDevice *device);
enum MaterialType{
MATERIAL_ALPHA_NONE,
MATERIAL_ALPHA_VERTEX,
MATERIAL_ALPHA_SIMPLE, // >127 = opaque
MATERIAL_ALPHA_BLEND,
};
// Material flags
#define MATERIAL_FLAG_BACKFACE_CULLING 0x01
/*
This fully defines the looks of a tile.
The SMaterial of a tile is constructed according to this.
*/
struct TileSpec
{
TileSpec():
texture(0),
alpha(255),
//material_type(MATERIAL_ALPHA_NONE),
// Use this so that leaves don't need a separate material
material_type(MATERIAL_ALPHA_SIMPLE),
material_flags(
//0 // <- DEBUG, Use the one below
MATERIAL_FLAG_BACKFACE_CULLING
)
{
}
bool operator==(TileSpec &other)
{
return (
texture == other.texture &&
alpha == other.alpha &&
material_type == other.material_type &&
material_flags == other.material_flags
);
}
// Sets everything else except the texture in the material
void applyMaterialOptions(video::SMaterial &material) const
{
if(alpha != 255 && material_type != MATERIAL_ALPHA_VERTEX)
dstream<<"WARNING: TileSpec: alpha != 255 "
"but not MATERIAL_ALPHA_VERTEX"
<<std::endl;
if(material_type == MATERIAL_ALPHA_NONE)
material.MaterialType = video::EMT_SOLID;
else if(material_type == MATERIAL_ALPHA_VERTEX)
material.MaterialType = video::EMT_TRANSPARENT_VERTEX_ALPHA;
else if(material_type == MATERIAL_ALPHA_SIMPLE)
material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL_REF;
else if(material_type == MATERIAL_ALPHA_BLEND)
material.MaterialType = video::EMT_TRANSPARENT_ALPHA_CHANNEL;
material.BackfaceCulling = (material_flags & MATERIAL_FLAG_BACKFACE_CULLING) ? true : false;
}
// NOTE: Deprecated, i guess?
void setTexturePos(u8 tx_, u8 ty_, u8 tw_, u8 th_)
{
texture.pos = v2f((float)tx_/256.0, (float)ty_/256.0);
texture.size = v2f(((float)tw_ + 1.0)/256.0, ((float)th_ + 1.0)/256.0);
}
AtlasPointer texture;
// Vertex alpha
u8 alpha;
// Material type
u8 material_type;
// Material flags
u8 material_flags;
};
#endif
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