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v2s32 intpos;
v2u32 intsize;
SourceAtlasPointer(
const std::string &name_,
AtlasPointer a_=AtlasPointer(0, NULL),
video::IImage *atlas_img_=NULL,
v2s32 intpos_=v2s32(0,0),
v2u32 intsize_=v2u32(0,0)
):
name(name_),
a(a_),
atlas_img(atlas_img_),
intpos(intpos_),
intsize(intsize_)
{
}
};
/*
Implementation (to be used as a no-op on the server)
*/
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;}
};
/*
Creates and caches textures.
*/
class TextureSource : public ITextureSource
{
public:
TextureSource(IrrlichtDevice *device);
~TextureSource();
/*
Processes queued texture requests from other threads.
Shall be called from the main thread.
*/
void processQueue();
/*
Example case:
Now, assume a texture with the id 1 exists, and has the name
"stone.png^mineral1".
Then a random thread calls getTextureId for a texture called
"stone.png^mineral1^crack0".
...Now, WTF should happen? Well:
- getTextureId strips off stuff recursively from the end until
the remaining part is found, or nothing is left when
something is stripped out
But it is slow to search for textures by names and modify them
like that?
- ContentFeatures is made to contain ids for the basic plain
textures
- Crack textures can be slow by themselves, but the framework
must be fast.
Example case #2:
- Assume a texture with the id 1 exists, and has the name
"stone.png^mineral1" and is specified as a part of some atlas.
- Now MapBlock::getNodeTile() stumbles upon a node which uses
texture id 1, and finds out that NODEMOD_CRACK must be applied
with progression=0
- It finds out the name of the texture with getTextureName(1),
appends "^crack0" to it and gets a new texture id with
getTextureId("stone.png^mineral1^crack0")
*/
/*
Gets a texture id from cache or
- if main thread, from getTextureIdDirect
- if other thread, adds to request queue and waits for main thread
*/
u32 getTextureId(const std::string &name);
/*
Example names:
"stone.png"
"stone.png^crack2"
"stone.png^blit:mineral_coal.png"
"stone.png^blit:mineral_coal.png^crack1"
- If texture specified by name is found from cache, return the
cached id.
- Otherwise generate the texture, add to cache and return id.
Recursion is used to find out the largest found part of the
texture and continue based on it.
The id 0 points to a NULL texture. It is returned in case of error.
*/
u32 getTextureIdDirect(const std::string &name);
/*
Finds out the name of a cached texture.
*/
std::string getTextureName(u32 id);
/*
If texture specified by the name pointed by the id doesn't
exist, create it, then return the cached texture.
Can be called from any thread. If called from some other thread
and not found in cache, the call is queued to the main thread
for processing.
*/
AtlasPointer getTexture(u32 id);
AtlasPointer getTexture(const std::string &name)
{
return getTexture(getTextureId(name));
}
// Gets a separate texture
video::ITexture* getTextureRaw(const std::string &name)
{
AtlasPointer ap = getTexture(name);
return ap.atlas;
}
private:
/*
Build the main texture atlas which contains most of the
textures.
This is called by the constructor.
*/
void buildMainAtlas();
// The id of the thread that is allowed to use irrlicht directly
threadid_t m_main_thread;
// The irrlicht device
IrrlichtDevice *m_device;
// A texture id is index in this array.
// The first position contains a NULL texture.
core::array<SourceAtlasPointer> m_atlaspointer_cache;
// Maps a texture name to an index in the former.
core::map<std::string, u32> m_name_to_id;
// The two former containers are behind this mutex
JMutex m_atlaspointer_cache_mutex;
// Main texture atlas. This is filled at startup and is then not touched.
video::IImage *m_main_atlas_image;
video::ITexture *m_main_atlas_texture;
// Queued texture fetches (to be processed by the main thread)
RequestQueue<std::string, u32, u8, u8> m_get_texture_queue;
};
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)
{
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