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#ifndef TEXTUREATLAS_H
#define TEXTUREATLAS_H
#include <string>
#include <vector>
#include <map>
#include "Rendering/GL/myGL.h"
#include "creg/creg_cond.h"
/** @brief Class for combining multiple bitmaps into one large single bitmap. */
struct AtlasedTexture
{
public:
CR_DECLARE_STRUCT(AtlasedTexture);
float xstart;
float xend;
float ystart;
float yend;
int ixstart;
int iystart;
};
/** @brief Same as AtlasedTexture but different name so the explosiongenerator
can differentiate between different atlases. */
struct GroundFXTexture : public AtlasedTexture
{
public:
CR_DECLARE_STRUCT(AtlasedTexture);
};
class CTextureAtlas
{
public:
//! set to true to write finalized texture atlas to disk
static bool debug;
GLuint gltex;
bool freeTexture; //! free texture on atlas destruction?
int xsize;
int ysize;
CTextureAtlas(int maxxSize, int maxySize);
~CTextureAtlas(void);
enum TextureType {
RGBA32
};
//! Add a texture from a memory pointer returns -1 if failed.
int AddTexFromMem(std::string name, int xsize, int ysize, TextureType texType, void *data);
//! Returns a memory pointer to the texture pixel data array. (reduces redundant memcpy in contrast to AddTexFromMem())
void* AddTex(std::string name, int xsize, int ysize, TextureType texType = RGBA32);
//! Add a texture from a file, returns -1 if failed.
int AddTexFromFile(std::string name, std::string file);
//! Creates the atlas containing all the specified textures.
//! return true if suceeded, false if all textures didn't fit into the specified maxsize.
bool Finalize();
void BindTexture();
//! return a Texture struct of the specified texture
AtlasedTexture GetTexture(const std::string& name);
//! Return a Texture struct of the specified texture if it exists, otherwise return a backup texture.
AtlasedTexture GetTextureWithBackup(const std::string& name, const std::string& backupName);
//! return a boolean true if the texture exists within the "textures" map and false if it does not.
bool TextureExists(const std::string& name);
//! return a pointer to a Texture struct of the specified texture, this pointer points to the actuall Texture struct stored, do not delete or modify
AtlasedTexture* GetTexturePtr(const std::string& name);
protected:
struct MemTex
{
std::vector<std::string> names;
int xsize;
int ysize;
TextureType texType;
int xpos;
int ypos;
void* data;
};
//temporary storage of all textures
std::vector<MemTex*> memtextures;
std::map<std::string, MemTex*> files;
std::map<std::string, AtlasedTexture> textures;
int maxxsize;
int maxysize;
int usedPixels;
bool initialized;
int GetBPP(TextureType tetxType);
static int CompareTex(MemTex *tex1, MemTex *tex2);
bool IncreaseSize();
void CreateTexture();
};
#endif // TEXTUREATLAS_H
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