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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) 2016 by Mike Erwin.
* All rights reserved.
*
* Contributor(s): Blender Foundation
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/gpu/GPU_element.h
* \ingroup gpu
*
* GPU element list (AKA index buffer)
*/
#ifndef __GPU_ELEMENT_H__
#define __GPU_ELEMENT_H__
#include "GPU_primitive.h"
#define GPU_TRACK_INDEX_RANGE 1
#define GPU_PRIM_RESTART 0xFFFFFFFF
typedef enum {
GPU_INDEX_U8, /* GL has this, Vulkan does not */
GPU_INDEX_U16,
GPU_INDEX_U32
} GPUIndexBufType;
typedef struct GPUIndexBuf {
uint index_len;
#if GPU_TRACK_INDEX_RANGE
GPUIndexBufType index_type;
uint32_t gl_index_type;
uint min_index;
uint max_index;
uint base_index;
#endif
uint32_t vbo_id; /* 0 indicates not yet sent to VRAM */
bool use_prim_restart;
} GPUIndexBuf;
void GPU_indexbuf_use(GPUIndexBuf *);
uint GPU_indexbuf_size_get(const GPUIndexBuf *);
typedef struct GPUIndexBufBuilder {
uint max_allowed_index;
uint max_index_len;
uint index_len;
GPUPrimType prim_type;
uint *data;
bool use_prim_restart;
} GPUIndexBufBuilder;
/* supports all primitive types. */
void GPU_indexbuf_init_ex(GPUIndexBufBuilder *, GPUPrimType, uint index_len, uint vertex_len, bool use_prim_restart);
/* supports only GPU_PRIM_POINTS, GPU_PRIM_LINES and GPU_PRIM_TRIS. */
void GPU_indexbuf_init(GPUIndexBufBuilder *, GPUPrimType, uint prim_len, uint vertex_len);
void GPU_indexbuf_add_generic_vert(GPUIndexBufBuilder *, uint v);
void GPU_indexbuf_add_primitive_restart(GPUIndexBufBuilder *);
void GPU_indexbuf_add_point_vert(GPUIndexBufBuilder *, uint v);
void GPU_indexbuf_add_line_verts(GPUIndexBufBuilder *, uint v1, uint v2);
void GPU_indexbuf_add_tri_verts(GPUIndexBufBuilder *, uint v1, uint v2, uint v3);
void GPU_indexbuf_add_line_adj_verts(GPUIndexBufBuilder *, uint v1, uint v2, uint v3, uint v4);
GPUIndexBuf *GPU_indexbuf_build(GPUIndexBufBuilder *);
void GPU_indexbuf_build_in_place(GPUIndexBufBuilder *, GPUIndexBuf *);
void GPU_indexbuf_discard(GPUIndexBuf *);
/* Macros */
#define GPU_INDEXBUF_DISCARD_SAFE(elem) do { \
if (elem != NULL) { \
GPU_indexbuf_discard(elem); \
elem = NULL; \
} \
} while (0)
#endif /* __GPU_ELEMENT_H__ */
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