1 files changed, 101 insertions, 0 deletions
diff --git a/source/blender/gpu/GPU_vertex_format.h b/source/blender/gpu/GPU_vertex_format.h
new file mode 100644
index 00000000000..91e31b5ece4
--- /dev/null
+++ b/source/blender/gpu/GPU_vertex_format.h
@@ -0,0 +1,101 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2016 by Mike Erwin.
+ * All rights reserved.
+ *
+ * Contributor(s): Blender Foundation
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/gpu/gwn_vertex_format.h
+ *  \ingroup gpu
+ *
+ * Gawain vertex format
+ */
+
+#ifndef __GWN_VERTEX_FORMAT_H__
+#define __GWN_VERTEX_FORMAT_H__
+
+#include "GPU_common.h"
+
+#define GWN_VERT_ATTR_MAX_LEN 16
+#define GWN_VERT_ATTR_MAX_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_VertAttr {
+	Gwn_VertFetchMode fetch_mode;
+	Gwn_VertCompType comp_type;
+	uint gl_comp_type;
+	uint comp_len; /* 1 to 4 or 8 or 12 or 16 */
+	uint sz; /* size in bytes, 1 to 64 */
+	uint offset; /* from beginning of vertex, in bytes */
+	uint name_len; /* up to GWN_VERT_ATTR_MAX_NAMES */
+	const char* name[GWN_VERT_ATTR_MAX_NAMES];
+} Gwn_VertAttr;
+
+typedef struct Gwn_VertFormat {
+	uint attr_len; /* 0 to 16 (GWN_VERT_ATTR_MAX_LEN) */
+	uint name_len; /* total count of active vertex attrib */
+	uint stride; /* stride in bytes, 1 to 256 */
+	uint name_offset;
+	bool packed;
+	char names[GWN_VERT_ATTR_NAMES_BUF_LEN];
+	Gwn_VertAttr attribs[GWN_VERT_ATTR_MAX_LEN]; /* TODO: variable-size attribs array */
+} Gwn_VertFormat;
+
+void GWN_vertformat_clear(Gwn_VertFormat*);
+void GWN_vertformat_copy(Gwn_VertFormat* dest, const Gwn_VertFormat* src);
+
+uint GWN_vertformat_attr_add(Gwn_VertFormat*, const char* name, Gwn_VertCompType, uint comp_len, Gwn_VertFetchMode);
+void GWN_vertformat_alias_add(Gwn_VertFormat*, const char* alias);
+
+/* format conversion */
+
+typedef struct Gwn_PackedNormal {
+	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]);
+
+#endif /* __GWN_VERTEX_FORMAT_H__ */