Rune Central

/*

================

GL_LoadTexture

================

*/

int lhcsumtable[256];

int GL_LoadTexture (char *identifier, int width, int height, byte *data, qboolean mipmap, qboolean alpha)

{

 qboolean noalpha;

 int   i, p, s, lhcsum;

 gltexture_t *glt;



 // LordHavoc: do a checksum to confirm the data really is the same as previous

 // occurances. well this isn't exactly a checksum, it's better than that but

 // not following any standards.

 lhcsum = 0;

 s = width*height;

 for (i = 0;i < 256;i++) lhcsumtable[i] = i + 1;

 for (i = 0;i < s;i++) lhcsum += (lhcsumtable[data[i] & 255]++);



 // see if the texture is allready present

 if (identifier[0])

 {

  for (i=0, glt=gltextures ; iidentifier))

   {

    // LordHavoc: everyone hates cache mismatchs, so I fixed it

    if (lhcsum != glt->lhcsum || width != glt->width || height != glt->height)

    {

     Con_DPrintf("GL_LoadTexture: cache mismatch, replacing old texture\n");

     goto GL_LoadTexture_setup; // drop out with glt pointing to the texture to replace

    }

    return glt->texnum;

   }

  }

 }

 // LordHavoc: this was an else condition, causing disasterous results,

 // whoever at id or threewave must've been half asleep...

 glt = &gltextures[numgltextures];

 numgltextures++;



 strcpy (glt->identifier, identifier);

 glt->texnum = texture_extension_number;

 texture_extension_number++;



// LordHavoc: label to drop out of the loop into the setup code

GL_LoadTexture_setup:

 glt->lhcsum = lhcsum; // LordHavoc: used to verify textures are identical

 glt->width = width;

 glt->height = height;

 glt->mipmap = mipmap;



 if (!isDedicated)

 {

         GL_Bind(glt->texnum);

         GL_Upload8 (data, width, height, mipmap, alpha);

 }



 return glt->texnum;

}