1 files changed, 78 insertions, 0 deletions
diff --git a/intern/gawain/gawain/gwn_vertex_format.h b/intern/gawain/gawain/gwn_vertex_format.h
new file mode 100644
index 00000000000..4b867ecbb45
--- /dev/null
+++ b/intern/gawain/gawain/gwn_vertex_format.h
@@ -0,0 +1,78 @@
+
+// Gawain vertex format
+//
+// This code is part of the Gawain library, with modifications
+// specific to integration with Blender.
+//
+// Copyright 2016 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 "gwn_common.h"
+
+#define GWN_VERT_ATTR_MAX_LEN 16
+#define MAX_ATTRIB_NAMES 3
+#define GWN_VERT_ATTR_NAME_AVERAGE_LEN 11
+#define GWN_VERT_ATTR_NAMES_BUF_LEN ((GWN_VERT_ATTR_NAME_AVERAGE_LEN + 1) * GWN_VERT_ATTR_MAX_LEN)
+
+typedef enum {
+	GWN_COMP_I8,
+	GWN_COMP_U8,
+	GWN_COMP_I16,
+	GWN_COMP_U16,
+	GWN_COMP_I32,
+	GWN_COMP_U32,
+
+	GWN_COMP_F32,
+
+	GWN_COMP_I10
+} Gwn_VertCompType;
+
+typedef enum {
+	GWN_FETCH_FLOAT,
+	GWN_FETCH_INT,
+	GWN_FETCH_INT_TO_FLOAT_UNIT, // 127 (ubyte) -> 0.5 (and so on for other int types)
+	GWN_FETCH_INT_TO_FLOAT // 127 (any int type) -> 127.0
+} Gwn_VertFetchMode;
+
+typedef struct {
+	Gwn_VertCompType comp_type;
+	unsigned gl_comp_type;
+	unsigned comp_ct; // 1 to 4
+	unsigned sz; // size in bytes, 1 to 16
+	unsigned offset; // from beginning of vertex, in bytes
+	Gwn_VertFetchMode fetch_mode;
+	const char* name[MAX_ATTRIB_NAMES];
+	unsigned name_ct;
+} Gwn_VertAttr;
+
+typedef struct {
+	unsigned attrib_ct; // 0 to 16 (GWN_VERT_ATTR_MAX_LEN)
+	unsigned name_ct; // total count of active vertex attrib
+	unsigned stride; // stride in bytes, 1 to 256
+	bool packed;
+	Gwn_VertAttr attribs[GWN_VERT_ATTR_MAX_LEN]; // TODO: variable-size attribs array
+	char names[GWN_VERT_ATTR_NAMES_BUF_LEN];
+	unsigned name_offset;
+} Gwn_VertFormat;
+
+void GWN_vertformat_clear(Gwn_VertFormat*);
+void GWN_vertformat_copy(Gwn_VertFormat* dest, const Gwn_VertFormat* src);
+
+unsigned GWN_vertformat_attr_add(Gwn_VertFormat*, const char* name, Gwn_VertCompType, unsigned comp_ct, Gwn_VertFetchMode);
+void GWN_vertformat_alias_add(Gwn_VertFormat*, const char* alias);
+
+// format conversion
+
+typedef struct {
+	int x : 10;
+	int y : 10;
+	int z : 10;
+	int w : 2;	// 0 by default, can manually set to { -2, -1, 0, 1 }
+} Gwn_PackedNormal;
+
+Gwn_PackedNormal GWN_normal_convert_i10_v3(const float data[3]);
+Gwn_PackedNormal GWN_normal_convert_i10_s3(const short data[3]);