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/*
* ***** 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) 2014 Blender Foundation.
* All rights reserved.
*
* Contributor(s): Antony Riakiotakis.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file source/blender/gpu/GPU_select.h
* \ingroup gpu
*/
#ifndef __GPU_SELECT__
#define __GPU_SELECT__
#include "GPU_glew.h"
#include "DNA_vec_types.h" /* rcft */
#include "BLI_sys_types.h"
/* flags for mode of operation */
enum {
GPU_SELECT_ALL = 1,
GPU_SELECT_NEAREST_FIRST_PASS = 2,
GPU_SELECT_NEAREST_SECOND_PASS = 3,
};
/* initialize and provide buffer for results */
void GPU_select_begin(unsigned int *buffer, unsigned int bufsize, rctf *input, char mode, int oldhits);
/* loads a new selection id and ends previous query, if any. In second pass of selection it also returns
* if id has been hit on the first pass already. Thus we can skip drawing un-hit objects IMPORTANT: We rely on the order of object rendering on passes to be
* the same for this to work */
bool GPU_select_load_id(unsigned int id);
/* cleanup and flush selection results to buffer. Return number of hits and hits in buffer.
* if dopass is true, we will do a second pass with occlusion queries to get the closest hit */
unsigned int GPU_select_end(void);
/* does the GPU support occlusion queries? */
bool GPU_select_query_check_support(void);
/* is occlusion query supported and user activated? */
bool GPU_select_query_check_active(void);
#endif
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