Clément Foucault
77f5210f22
This type of indices is not natively supported on modern GPU and gives warning on some implementation. The memory savings it provides is also quite minimal and unlikely to be visible on nowadays hardware. This remove some uneeded struct members and makes primitive restart always enabled by default. This can be broken by addons if they are not careful enough but many other states have this problem. Also leverage GL_PRIMITIVE_RESTART_FIXED_INDEX if ARB_ES3_compatibility is supported. This removes all API calls to change restart index depending on indices length.
92 lines
2.7 KiB
C++
92 lines
2.7 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2016 by Mike Erwin.
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* All rights reserved.
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*/
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/** \file
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* \ingroup gpu
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*
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* GPU element list (AKA index buffer)
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*/
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#ifndef __GPU_ELEMENT_H__
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#define __GPU_ELEMENT_H__
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#include "GPU_primitive.h"
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#define GPU_TRACK_INDEX_RANGE 1
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typedef enum {
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GPU_INDEX_U16,
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GPU_INDEX_U32,
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} GPUIndexBufType;
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typedef struct GPUIndexBuf {
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uint index_len;
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#if GPU_TRACK_INDEX_RANGE
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GPUIndexBufType index_type;
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uint32_t gl_index_type;
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uint base_index;
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#endif
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uint32_t ibo_id; /* 0 indicates not yet sent to VRAM */
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void *data; /* non-NULL indicates not yet sent to VRAM */
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} GPUIndexBuf;
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void GPU_indexbuf_use(GPUIndexBuf *);
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uint GPU_indexbuf_size_get(const GPUIndexBuf *);
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typedef struct GPUIndexBufBuilder {
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uint max_allowed_index;
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uint max_index_len;
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uint index_len;
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GPUPrimType prim_type;
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uint *data;
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} GPUIndexBufBuilder;
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/* supports all primitive types. */
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void GPU_indexbuf_init_ex(GPUIndexBufBuilder *, GPUPrimType, uint index_len, uint vertex_len);
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/* supports only GPU_PRIM_POINTS, GPU_PRIM_LINES and GPU_PRIM_TRIS. */
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void GPU_indexbuf_init(GPUIndexBufBuilder *, GPUPrimType, uint prim_len, uint vertex_len);
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void GPU_indexbuf_add_generic_vert(GPUIndexBufBuilder *, uint v);
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void GPU_indexbuf_add_primitive_restart(GPUIndexBufBuilder *);
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void GPU_indexbuf_add_point_vert(GPUIndexBufBuilder *, uint v);
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void GPU_indexbuf_add_line_verts(GPUIndexBufBuilder *, uint v1, uint v2);
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void GPU_indexbuf_add_tri_verts(GPUIndexBufBuilder *, uint v1, uint v2, uint v3);
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void GPU_indexbuf_add_line_adj_verts(GPUIndexBufBuilder *, uint v1, uint v2, uint v3, uint v4);
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GPUIndexBuf *GPU_indexbuf_build(GPUIndexBufBuilder *);
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void GPU_indexbuf_build_in_place(GPUIndexBufBuilder *, GPUIndexBuf *);
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void GPU_indexbuf_discard(GPUIndexBuf *);
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int GPU_indexbuf_primitive_len(GPUPrimType prim_type);
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/* Macros */
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#define GPU_INDEXBUF_DISCARD_SAFE(elem) \
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do { \
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if (elem != NULL) { \
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GPU_indexbuf_discard(elem); \
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elem = NULL; \
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} \
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} while (0)
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#endif /* __GPU_ELEMENT_H__ */
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