Campbell Barton
c434782e3a
Use a shorter/simpler license convention, stops the header taking so much space. Follow the SPDX license specification: https://spdx.org/licenses - C/C++/objc/objc++ - Python - Shell Scripts - CMake, GNUmakefile While most of the source tree has been included - `./extern/` was left out. - `./intern/cycles` & `./intern/atomic` are also excluded because they use different header conventions. doc/license/SPDX-license-identifiers.txt has been added to list SPDX all used identifiers. See P2788 for the script that automated these edits. Reviewed By: brecht, mont29, sergey Ref D14069
124 lines
3.0 KiB
C++
124 lines
3.0 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
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* Copyright 2020 Blender Foundation. All rights reserved. */
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/** \file
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* \ingroup gpu
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*/
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#pragma once
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#include "BLI_assert.h"
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#include "GPU_index_buffer.h"
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#define GPU_TRACK_INDEX_RANGE 1
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namespace blender::gpu {
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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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static inline size_t to_bytesize(GPUIndexBufType type)
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{
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return (type == GPU_INDEX_U32) ? sizeof(uint32_t) : sizeof(uint16_t);
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}
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/**
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* Base class which is then specialized for each implementation (GL, VK, ...).
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*
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* \note #IndexBuf does not hold any #GPUPrimType.
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* This is because it can be interpreted differently by multiple batches.
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*/
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class IndexBuf {
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protected:
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/** Type of indices used inside this buffer. */
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GPUIndexBufType index_type_ = GPU_INDEX_U32;
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/** Offset in this buffer to the first index to render. Is 0 if not a subrange. */
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uint32_t index_start_ = 0;
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/** Number of indices to render. */
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uint32_t index_len_ = 0;
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/** Base index: Added to all indices after fetching. Allows index compression. */
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uint32_t index_base_ = 0;
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/** Bookkeeping. */
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bool is_init_ = false;
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/** Is this object only a reference to a subrange of another IndexBuf. */
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bool is_subrange_ = false;
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union {
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/** Mapped buffer data. non-NULL indicates not yet sent to VRAM. */
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void *data_ = nullptr;
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/** If is_subrange is true, this is the source index buffer. */
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IndexBuf *src_;
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};
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public:
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IndexBuf(){};
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virtual ~IndexBuf();
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void init(uint indices_len, uint32_t *indices, uint min_index, uint max_index);
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void init_subrange(IndexBuf *elem_src, uint start, uint length);
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void init_build_on_device(uint index_len);
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uint32_t index_len_get() const
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{
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return index_len_;
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}
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/* Return size in byte of the drawable data buffer range. Actual buffer size might be bigger. */
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size_t size_get() const
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{
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return index_len_ * to_bytesize(index_type_);
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};
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bool is_init() const
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{
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return is_init_;
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};
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virtual void upload_data() = 0;
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virtual void bind_as_ssbo(uint binding) = 0;
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virtual const uint32_t *read() const = 0;
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uint32_t *unmap(const uint32_t *mapped_memory) const;
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virtual void update_sub(uint start, uint len, const void *data) = 0;
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private:
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inline void squeeze_indices_short(uint min_idx, uint max_idx);
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inline uint index_range(uint *r_min, uint *r_max);
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};
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/* Syntactic sugar. */
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static inline GPUIndexBuf *wrap(IndexBuf *indexbuf)
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{
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return reinterpret_cast<GPUIndexBuf *>(indexbuf);
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}
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static inline IndexBuf *unwrap(GPUIndexBuf *indexbuf)
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{
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return reinterpret_cast<IndexBuf *>(indexbuf);
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}
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static inline const IndexBuf *unwrap(const GPUIndexBuf *indexbuf)
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{
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return reinterpret_cast<const IndexBuf *>(indexbuf);
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}
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static inline int indices_per_primitive(GPUPrimType prim_type)
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{
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switch (prim_type) {
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case GPU_PRIM_POINTS:
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return 1;
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case GPU_PRIM_LINES:
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return 2;
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case GPU_PRIM_TRIS:
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return 3;
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case GPU_PRIM_LINES_ADJ:
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return 4;
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default:
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return -1;
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}
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}
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} // namespace blender::gpu
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