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ref: gl: more simple search of GL func with alternative name (EXT, OES suffixes or no suffix)

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This commit is contained in:
Alibek Omarov 2023-10-22 19:16:16 +03:00
parent 3ac8ad9484
commit 3251b68df5
1 changed files with 34 additions and 28 deletions
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62
ref/gl/gl_opengl.c
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@ -549,48 +549,54 @@ qboolean GL_CheckExtension( const char *name, const dllfunc_t *funcs, const char
for( func = funcs; func && func->name; func++ )
{
// functions are cleared before all the extensions are evaluated
if((*func->func = (void *)gEngfuncs.GL_GetProcAddress( func->name )) == NULL )
if(( *func->func = (void *)gEngfuncs.GL_GetProcAddress( func->name )) == NULL )
{
string name;
char *end;
size_t i = 0;
#ifdef XASH_GLES
const char *suffixes[] = { "", "EXT", "OES" };
#else
const char *suffixes[] = { "", "EXT" };
#endif
// HACK: fix ARB names
const char *str = Q_strstr( func->name, "ARB" );
Q_strncpy( name, func->name, MAX_STRING );
if( str )
Q_strncpy( name, func->name, sizeof( name ));
if(( end = Q_strstr( name, "ARB" )))
{
name[str - func->name] = '\0'; // cut func suffix
// if this was glFuncARB, try glFunc
*func->func = gEngfuncs.GL_GetProcAddress( name );
*end = '\0';
}
else
else // I need Q_strstrnul
{
// set pointer to func name end to cut it correctly
str = func->name + Q_strlen( func->name );
name[str - func->name] = '\0';
end = name + Q_strlen( name );
i++; // skip empty suffix
}
// try glFuncEXT
if( !*func->func )
for( ; i < sizeof( suffixes ) / sizeof( suffixes[0] ); i++ )
{
Q_strncat( name, "EXT", MAX_STRING );
*func->func = gEngfuncs.GL_GetProcAddress( name );
void *f;
Q_strncat( name, suffixes[i], sizeof( name ));
if(( f = gEngfuncs.GL_GetProcAddress( name )))
{
// GL_GetProcAddress prints errors about missing functions, so tell user that we found it with different name
gEngfuncs.Con_Printf( S_NOTE "found %s\n", name );
*func->func = f;
break;
}
else
{
*end = '\0'; // cut suffix, try next
}
}
#ifdef XASH_GLES
// try glFuncOES
if( !*func->func )
// not found...
if( i == sizeof( suffixes ) / sizeof( suffixes[0] ))
{
name[str - func->name] = '\0'; // cut EXT from previous try
Q_strncat( name, "OES", MAX_STRING );
*func->func = gEngfuncs.GL_GetProcAddress( name );
}
#endif
if( !*func->func )
GL_SetExtension( r_ext, false );
else // GL_GetProcAddress prints errors about missing functions, so tell user that we found it with different name
gEngfuncs.Con_Printf( S_NOTE "found %s\n", name );
}
}
}
#endif