118 lines
3.9 KiB
C
118 lines
3.9 KiB
C
/* SPDX-FileCopyrightText: 2016 by Mike Erwin. All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup gpu
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*
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* GPU index buffer
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*/
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#pragma once
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#include "GPU_primitive.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** Opaque type hiding blender::gpu::IndexBuf. */
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typedef struct GPUIndexBuf GPUIndexBuf;
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GPUIndexBuf *GPU_indexbuf_calloc(void);
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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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uint index_min;
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uint index_max;
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uint restart_index_value;
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bool uses_restart_indices;
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GPUPrimType prim_type;
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uint32_t *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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GPUIndexBuf *GPU_indexbuf_build_on_device(uint index_len);
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void GPU_indexbuf_init_build_on_device(GPUIndexBuf *elem, uint index_len);
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/*
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* Thread safe.
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*
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* Function inspired by the reduction directives of multi-thread work API's.
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*/
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void GPU_indexbuf_join(GPUIndexBufBuilder *builder, const GPUIndexBufBuilder *builder_from);
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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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void GPU_indexbuf_set_point_vert(GPUIndexBufBuilder *builder, uint elem, uint v1);
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void GPU_indexbuf_set_line_verts(GPUIndexBufBuilder *builder, uint elem, uint v1, uint v2);
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void GPU_indexbuf_set_tri_verts(GPUIndexBufBuilder *builder, uint elem, uint v1, uint v2, uint v3);
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/* Skip primitive rendering at the given index. */
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void GPU_indexbuf_set_point_restart(GPUIndexBufBuilder *builder, uint elem);
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void GPU_indexbuf_set_line_restart(GPUIndexBufBuilder *builder, uint elem);
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void GPU_indexbuf_set_tri_restart(GPUIndexBufBuilder *builder, uint elem);
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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_bind_as_ssbo(GPUIndexBuf *elem, int binding);
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/* Upload data to the GPU (if not built on the device) and bind the buffer to its default target.
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*/
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void GPU_indexbuf_use(GPUIndexBuf *elem);
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/* Partially update the GPUIndexBuf which was already sent to the device, or built directly on the
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* device. The data needs to be compatible with potential compression applied to the original
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* indices when the index buffer was built, i.e., if the data was compressed to use shorts instead
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* of ints, shorts should passed here. */
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void GPU_indexbuf_update_sub(GPUIndexBuf *elem, uint start, uint len, const void *data);
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/* Create a sub-range of an existing index-buffer. */
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GPUIndexBuf *GPU_indexbuf_create_subrange(GPUIndexBuf *elem_src, uint start, uint length);
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void GPU_indexbuf_create_subrange_in_place(GPUIndexBuf *elem,
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GPUIndexBuf *elem_src,
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uint start,
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uint length);
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/**
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* (Download and) fill data with the contents of the index buffer.
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*
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* NOTE: caller is responsible to reserve enough memory.
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*/
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void GPU_indexbuf_read(GPUIndexBuf *elem, uint32_t *data);
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void GPU_indexbuf_discard(GPUIndexBuf *elem);
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bool GPU_indexbuf_is_init(GPUIndexBuf *elem);
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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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#ifdef __cplusplus
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}
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#endif
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