/*
Minetest-c55
-Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
+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
#define TILE_HEADER
#include "common_irrlicht.h"
-//#include "utility.h"
+#include "threads.h"
+#include "utility.h"
#include <string>
-struct TileSpec
+/*
+ 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
{
- TileSpec():
- alpha(255)
+ 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_)
{
}
- TileSpec(const std::string &a_name):
- name(a_name),
- alpha(255)
+ 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; }
+};
+
+/*
+ An internal variant of the former with more data.
+*/
+struct SourceAtlasPointer
+{
+ std::string name;
+ AtlasPointer a;
+ video::IImage *atlas_img; // The source image of the atlas
+ // Integer variants of position and size
+ 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;
}
- TileSpec(const char *a_name):
- name(a_name),
- alpha(255)
+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 (name == other.name && alpha == other.alpha);
+ return (
+ texture == other.texture &&
+ alpha == other.alpha &&
+ material_type == other.material_type &&
+ material_flags == other.material_flags
+ );
}
- // path + mods
- std::string name;
+ // 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
projects / oweals / minetest.git / blobdiff