Gawain: move AttribBinding funcs to private interface

Other parts of Gawain uses these internally, but they're not part of the public API.

Part of T51219

intern/gawain/gawain/attrib_binding.h

@@ -11,15 +11,9 @@
 
 #pragma once
 
-#include "vertex_format.h"
-#include "shader_interface.h"
+#include "common.h"
 
 typedef struct {
 	uint64_t loc_bits; // store 4 bits for each of the 16 attribs
 	uint16_t enabled_bits; // 1 bit for each attrib
 } AttribBinding;
-
-void AttribBinding_clear(AttribBinding*);
-
-void get_attrib_locations(const VertexFormat*, AttribBinding*, const ShaderInterface*);
-unsigned read_attrib_location(const AttribBinding*, unsigned a_idx);

intern/gawain/gawain/attrib_binding_private.h

@@ -0,0 +1,20 @@
+
+// Gawain vertex attribute binding
+//
+// This code is part of the Gawain library, with modifications
+// specific to integration with Blender.
+//
+// Copyright 2017 Mike Erwin
+//
+// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of
+// the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+#pragma once
+
+#include "vertex_format.h"
+#include "shader_interface.h"
+
+void AttribBinding_clear(AttribBinding*);
+
+void get_attrib_locations(const VertexFormat*, AttribBinding*, const ShaderInterface*);
+unsigned read_attrib_location(const AttribBinding*, unsigned a_idx);

intern/gawain/src/attrib_binding.c

@@ -10,6 +10,7 @@
 // the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
 #include "attrib_binding.h"
+#include "attrib_binding_private.h"
 #include <stddef.h>
 
 #if MAX_VERTEX_ATTRIBS != 16

intern/gawain/src/immediate.c

@@ -10,8 +10,9 @@
 // the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
 
 #include "immediate.h"
-#include "attrib_binding.h"
 #include "buffer_id.h"
+#include "attrib_binding.h"
+#include "attrib_binding_private.h"
 #include "vertex_format_private.h"
 #include <string.h>