/*
 * Copyright 2011, Blender Foundation.
 *
 * 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.
 */

#ifndef __OSL_GLOBALS_H__
#define __OSL_GLOBALS_H__

#ifdef WITH_OSL

#include <OSL/oslexec.h>

#include "util_map.h"
#include "util_param.h"
#include "util_thread.h"
#include "util_vector.h"

CCL_NAMESPACE_BEGIN

struct OSLGlobals {
	/* use */
	bool use;

	/* shading system */ 
	OSL::ShadingSystem *ss;

	/* shader states */
	vector<OSL::ShadingAttribStateRef> surface_state;
	vector<OSL::ShadingAttribStateRef> volume_state;
	vector<OSL::ShadingAttribStateRef> displacement_state;
	OSL::ShadingAttribStateRef background_state;

	/* attributes */
	struct Attribute {
		TypeDesc type;
		AttributeElement elem;
		int offset;
		ParamValue value;
	};

	typedef unordered_map<ustring, Attribute, ustringHash> AttributeMap;
	typedef unordered_map<ustring, int, ustringHash> ObjectNameMap;

	vector<AttributeMap> attribute_map;
	ObjectNameMap object_name_map;

	/* thread key for thread specific data lookup */
	struct ThreadData {
		OSL::ShaderGlobals globals;
		void *thread_info;
	};

	static tls_ptr(ThreadData, thread_data);
};

CCL_NAMESPACE_END

#endif

#endif /* __OSL_GLOBALS_H__ */