+#ifndef R_TEXTURES_H
+#define R_TEXTURES_H
+
// transparent
#define TEXF_ALPHA 0x00000001
// mipmapped
// upload immediately, never defer (ignore r_textureprecache)
#define TEXF_ALWAYSPRECACHE 0x00000008
// allocated as a fragment in a larger texture, mipmap is not allowed with
-// this, mostly used for lightmaps (which are procedural textures)
+// this, mostly used for lightmaps
#define TEXF_FRAGMENT 0x00000010
// used for checking if textures mismatch
#define TEXF_IMPORTANTBITS (TEXF_ALPHA | TEXF_MIPMAP | TEXF_FRAGMENT)
// 32bit RGBA
#define TEXTYPE_RGBA 3
-// contents of this structure are private to gl_textures.c
+// contents of this structure are mostly private to gl_textures.c
typedef struct
{
- int useless;
+ // this is exposed (rather than private) for speed reasons only
+ int texnum;
}
rtexture_t;
}
rtexturepool_t;
-// allocate a texture pool, to be used with R_LoadTexture/R_ProceduralTexture
+// 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);
// update system, to get a compliant size, use R_CompatibleFragmentWidth
int R_CompatibleFragmentWidth(int width, int textype, int flags);
-// these two functions add a texture to a pool, and may precache (upload) it
-// a normal static texture
-rtexture_t *R_LoadTexture (rtexturepool_t *rtexturepool, char *identifier, int width, int height, byte *data, int textype, int flags);
-// a procedurally generated texture, often animated over time, note: generate can be NULL (for odd uses)
-rtexture_t *R_ProceduralTexture (rtexturepool_t *rtexturepool, char *identifier, int width, int height, int textype, int flags, int (*generate)(byte *buffer, int width, int height, void *parameterdata, int parameterdatasize), void *parameterdata, int parameterdatasize);
+// add a texture to a pool and optionally precache (upload) it
+// (note: data == NULL is perfectly acceptable)
+rtexture_t *R_LoadTexture (rtexturepool_t *rtexturepool, char *identifier, int width, int height, qbyte *data, int textype, int flags);
-// update the image data of a texture, used by lightmap updates and procedural
-// textures.
-void R_UpdateTexture(rtexture_t *rt, byte *data);
+// free a texture
+void R_FreeTexture(rtexture_t *rt);
-// location of the fragment in the texture (note: any parameter except rt can be NULL)
-void R_GetFragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2);
+// update the image data of a texture, used by lightmap updates and
+// procedural textures.
+void R_UpdateTexture(rtexture_t *rt, qbyte *data);
-// returns the renderer dependent texture slot number (call this before each use, as a texture might not have been precached, or it might change over time if it is procedural)
-int R_GetTexture (rtexture_t *rt);
+// location of the fragment in the texture (note: any parameter except rt can
+// be NULL)
+void R_FragmentLocation(rtexture_t *rt, int *x, int *y, float *fx1, float *fy1, float *fx2, float *fy2);
+
+// 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)->texnum >= 0 ? (rt)->texnum : R_RealGetTexture(rt)) : 0)
+int R_RealGetTexture (rtexture_t *rt);
// returns true if the texture is transparent (useful for rendering code)
int R_TextureHasAlpha(rtexture_t *rt);
// returns height of texture, as was specified when it was uploaded
int R_TextureHeight(rtexture_t *rt);
+
+#endif
+