blender-archive/source/blender/gpu/GPU_select.h

/*
 * 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.
 */

/** \file
 * \ingroup gpu
 */

#ifndef __GPU_SELECT_H__
#define __GPU_SELECT_H__

#include "BLI_sys_types.h"

#ifdef __cplusplus
extern "C" {
#endif

struct rcti;

/* flags for mode of operation */
enum {
  GPU_SELECT_ALL = 1,
  /* gpu_select_query */
  GPU_SELECT_NEAREST_FIRST_PASS = 2,
  GPU_SELECT_NEAREST_SECOND_PASS = 3,
  /* gpu_select_pick */
  GPU_SELECT_PICK_ALL = 4,
  GPU_SELECT_PICK_NEAREST = 5,
};

void GPU_select_begin(
    unsigned int *buffer, unsigned int bufsize, const struct rcti *input, char mode, int oldhits);
bool GPU_select_load_id(unsigned int id);
void GPU_select_finalize(void);
unsigned int GPU_select_end(void);

/* cache selection region */
bool GPU_select_is_cached(void);
void GPU_select_cache_begin(void);
void GPU_select_cache_load_id(void);
void GPU_select_cache_end(void);

/* utilities */
const uint *GPU_select_buffer_near(const uint *buffer, int hits);
void GPU_select_buffer_stride_realign(const struct rcti *src, const struct rcti *dst, uint *r_buf);

#ifdef __cplusplus
}
#endif

#endif