+// contents of this structure are private to gl_textures.c
+typedef struct rtexturepool_s
+{
+ int useless;
+}
+rtexturepool_t;
+
+typedef struct skinframe_s
+{
+ struct rtexture_s *stain; // inverse modulate with background (used for decals and such)
+ struct rtexture_s *merged; // original texture without glow
+ struct rtexture_s *base; // original texture without pants/shirt/glow
+ struct rtexture_s *pants; // pants only (in greyscale)
+ struct rtexture_s *shirt; // shirt only (in greyscale)
+ struct rtexture_s *nmap; // normalmap (bumpmap for dot3)
+ struct rtexture_s *gloss; // glossmap (for dot3)
+ struct rtexture_s *glow; // glow only (fullbrights)
+ struct rtexture_s *fog; // alpha of the base texture (if not opaque)
+ struct rtexture_s *reflect; // colored mask for cubemap reflections
+ // accounting data for hash searches:
+ // the compare variables are used to identify internal skins from certain
+ // model formats
+ // (so that two q1bsp maps with the same texture name for different
+ // textures do not have any conflicts)
+ struct skinframe_s *next; // next on hash chain
+ char basename[MAX_QPATH]; // name of this
+ int textureflags; // texture flags to use
+ int comparewidth;
+ int compareheight;
+ int comparecrc;
+ // mark and sweep garbage collection, this value is updated to a new value
+ // on each level change for the used skinframes, if some are not used they
+ // are freed
+ unsigned int loadsequence;
+ // indicates whether this texture has transparent pixels
+ qbool hasalpha;
+ // average texture color, if applicable
+ float avgcolor[4];
+ // for mdl skins, we actually only upload on first use (many are never used, and they are almost never used in both base+pants+shirt and merged modes)
+ unsigned char *qpixels;
+ int qwidth;
+ int qheight;
+ qbool qhascolormapping;
+ qbool qgeneratebase;
+ qbool qgeneratemerged;
+ qbool qgeneratenmap;
+ qbool qgenerateglow;
+}
+skinframe_t;
+
+typedef void (*updatecallback_t)(rtexture_t *rt, void *data);
+
+// allocate a texture pool, to be used with R_LoadTexture
+rtexturepool_t *R_AllocTexturePool(void);
+// free a texture pool (textures can not be freed individually)
+void R_FreeTexturePool(rtexturepool_t **rtexturepool);
+
+// the color/normal/etc cvars should be checked by callers of R_LoadTexture* functions to decide whether to add TEXF_COMPRESS to the flags
+extern struct cvar_s gl_texturecompression;
+extern struct cvar_s gl_texturecompression_color;
+extern struct cvar_s gl_texturecompression_normal;
+extern struct cvar_s gl_texturecompression_gloss;
+extern struct cvar_s gl_texturecompression_glow;
+extern struct cvar_s gl_texturecompression_2d;
+extern struct cvar_s gl_texturecompression_q3bsplightmaps;
+extern struct cvar_s gl_texturecompression_q3bspdeluxemaps;
+extern struct cvar_s gl_texturecompression_sky;
+extern struct cvar_s gl_texturecompression_lightcubemaps;
+extern struct cvar_s gl_texturecompression_reflectmask;
+extern struct cvar_s r_texture_dds_load;
+extern struct cvar_s r_texture_dds_save;
+
+// add a texture to a pool and optionally precache (upload) it
+// (note: data == NULL is perfectly acceptable)
+// (note: palette must not be NULL if using TEXTYPE_PALETTE)
+rtexture_t *R_LoadTexture2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, const unsigned char *data, textype_t textype, int flags, int miplevel, const unsigned int *palette);
+rtexture_t *R_LoadTexture3D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, const unsigned char *data, textype_t textype, int flags, int miplevel, const unsigned int *palette);
+rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, textype_t textype, int flags, int miplevel, const unsigned int *palette);
+rtexture_t *R_LoadTextureShadowMap2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, textype_t textype, qbool filter);
+rtexture_t *R_LoadTextureRenderBuffer(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, textype_t textype);
+rtexture_t *R_LoadTextureDDSFile(rtexturepool_t *rtexturepool, const char *filename, qbool srgb, int flags, qbool *hasalphaflag, float *avgcolor, int miplevel, qbool optionaltexture);
+
+// saves a texture to a DDS file
+int R_SaveTextureDDSFile(rtexture_t *rt, const char *filename, qbool skipuncompressed, qbool hasalpha);
+
+// free a texture
+void R_FreeTexture(rtexture_t *rt);
+
+// update a portion of the image data of a texture, used by lightmap updates
+// and procedural textures such as video playback, actual uploads may be
+// delayed by gl_nopartialtextureupdates cvar until R_Mesh_TexBind uses it
+// combine has 3 values: 0 = immediately upload (glTexSubImage2D), 1 = combine with other updates (glTexSubImage2D on next draw), 2 = combine with other updates and never upload partial images (glTexImage2D on next draw)
+void R_UpdateTexture(rtexture_t *rt, const unsigned char *data, int x, int y, int z, int width, int height, int depth, int combine);
+
+// returns the renderer dependent texture slot number (call this before each
+// use, as a texture might not have been precached)
+#define R_GetTexture(rt) ((rt) ? ((rt)->dirty ? R_RealGetTexture(rt) : (rt)->texnum) : r_texture_white->texnum)
+int R_RealGetTexture (rtexture_t *rt);
+
+// returns width of texture, as was specified when it was uploaded
+int R_TextureWidth(rtexture_t *rt);
+
+// returns height of texture, as was specified when it was uploaded
+int R_TextureHeight(rtexture_t *rt);
+
+// returns flags of texture, as was specified when it was uploaded
+int R_TextureFlags(rtexture_t *rt);
+
+// only frees the texture if TEXF_PERSISTENT is not set
+// also resets the variable
+void R_PurgeTexture(rtexture_t *prt);
+
+// frees processing buffers each frame, and may someday animate procedural textures
+void R_Textures_Frame(void);
+
+// maybe rename this - sounds awful? [11/21/2007 Black]
+void R_MarkDirtyTexture(rtexture_t *rt);
+void R_MakeTextureDynamic(rtexture_t *rt, updatecallback_t updatecallback, void *data);
+
+// Clear the texture's contents
+void R_ClearTexture (rtexture_t *rt);
+
+// returns the desired picmip level for given TEXF_ flags
+int R_PicmipForFlags(int flags);
+
+void R_TextureStats_Print(qbool printeach, qbool printpool, qbool printtotal);
+
+#endif
+