ref_gl: add missing non-arb shader functions

ref/gl/gl2_shim/gl2_shim.c

@@ -355,16 +355,22 @@ static gl2wrap_prog_t *GL2_GetProg( const GLuint flags )
 	pglDeleteObjectARB( fp );
 
 /// TODO: detect arb/core shaders in engine
-#if 0 //ndef XASH_GLES
+
-	pglGetObjectParameterivARB( glprog, GL_OBJECT_LINK_STATUS_ARB, &status );
+	if( pglProgramiv )
+		pglProgramiv( glprog, GL_OBJECT_LINK_STATUS_ARB, &status );
+	else
+		pglGetObjectParameterivARB( glprog, GL_OBJECT_LINK_STATUS_ARB, &status );
 	if ( status == GL_FALSE )
 	{
 		gEngfuncs.Con_Reportf( S_ERROR "GL2_GetProg(): Failed linking progs for 0x%04x!\n%s\n", prog->flags, GL_PrintInfoLog(glprog) );
 		prog->flags = 0;
-		pglDeleteObjectARB( glprog );
+		if( pglDeleteProgram )
+			pglDeleteProgram( glprog );
+		else
+			pglDeleteObjectARB( glprog );
 		return NULL;
 	}
-#endif
+
 
 	prog->ucolor = pglGetUniformLocationARB( glprog, "uColor" );
 	prog->ualpha = pglGetUniformLocationARB( glprog, "uAlphaTest" );

ref/gl/gl_export.h

@@ -1366,6 +1366,10 @@ APIENTRY_LINKAGE void GL_FUNCTION( glGenVertexArrays )( GLsizei n, const GLuint
 APIENTRY_LINKAGE GLboolean GL_FUNCTION( glIsVertexArray )( GLuint array );
 APIENTRY_LINKAGE void GL_FUNCTION( glSwapInterval ) ( int interval );
 
+APIENTRY_LINKAGE void GL_FUNCTION( glDeleteProgram )(GLuint program);
+APIENTRY_LINKAGE void GL_FUNCTION( glProgramiv )(GLuint program, GLenum e, GLuint *v);
+
+
 #if !defined( XASH_GL_STATIC ) || (!defined( XASH_GLES ) && !defined( XASH_GL4ES ))
 APIENTRY_LINKAGE void GL_FUNCTION( glTexImage2DMultisample )(GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height, GLboolean fixedsamplelocations);
 #endif /* !XASH_GLES && !XASH_GL4ES */

ref/gl/gl_opengl.c

@@ -354,6 +354,8 @@ static dllfunc_t shaderobjectsfuncs_gles[] =
 	{ "glVertexAttrib2f"              , (void **)&pglVertexAttrib2fARB },
 	{ "glVertexAttrib2fv"             , (void **)&pglVertexAttrib2fvARB },
 	{ "glVertexAttrib3fv"             , (void **)&pglVertexAttrib3fvARB },
+	{ "glProgramiv"                  , (void**)&pglProgramiv },
+	{ "glDeleteProgram"                  , (void**)&pglDeleteProgram },
 	//{ "glVertexAttrib4f"              , (void **)&pglVertexAttrib4fARB },
 	//{ "glVertexAttrib4fv"             , (void **)&pglVertexAttrib4fvARB },
 	//{ "glVertexAttrib4ubv"            , (void **)&pglVertexAttrib4ubvARB },