Clément Foucault
3e989e8c8d
This is often needed and somehow cumbersome to set up. This will allow some code simplifications.
113 lines
2.5 KiB
C++
113 lines
2.5 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later
|
|
* Copyright 2016 by Mike Erwin. All rights reserved. */
|
|
|
|
/** \file
|
|
* \ingroup gpu
|
|
*
|
|
* GPU vertex buffer
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "GPU_vertex_buffer.h"
|
|
|
|
namespace blender::gpu {
|
|
|
|
/**
|
|
* Implementation of Vertex Buffers.
|
|
* Base class which is then specialized for each implementation (GL, VK, ...).
|
|
*/
|
|
class VertBuf {
|
|
public:
|
|
static size_t memory_usage;
|
|
|
|
GPUVertFormat format = {};
|
|
/** Number of verts we want to draw. */
|
|
uint vertex_len = 0;
|
|
/** Number of verts data. */
|
|
uint vertex_alloc = 0;
|
|
/** Status flag. */
|
|
GPUVertBufStatus flag = GPU_VERTBUF_INVALID;
|
|
/** NULL indicates data in VRAM (unmapped) */
|
|
uchar *data = NULL;
|
|
|
|
protected:
|
|
/** Usage hint for GL optimization. */
|
|
GPUUsageType usage_ = GPU_USAGE_STATIC;
|
|
|
|
private:
|
|
/** This counter will only avoid freeing the #GPUVertBuf, not the data. */
|
|
int handle_refcount_ = 1;
|
|
|
|
public:
|
|
VertBuf();
|
|
virtual ~VertBuf();
|
|
|
|
void init(const GPUVertFormat *format, GPUUsageType usage);
|
|
void clear();
|
|
|
|
/* Data management. */
|
|
void allocate(uint vert_len);
|
|
void resize(uint vert_len);
|
|
void upload();
|
|
virtual void bind_as_ssbo(uint binding) = 0;
|
|
virtual void bind_as_texture(uint binding) = 0;
|
|
|
|
virtual void wrap_handle(uint64_t handle) = 0;
|
|
|
|
VertBuf *duplicate();
|
|
|
|
/* Size of the data allocated. */
|
|
size_t size_alloc_get() const
|
|
{
|
|
BLI_assert(format.packed);
|
|
return vertex_alloc * format.stride;
|
|
}
|
|
/* Size of the data uploaded to the GPU. */
|
|
size_t size_used_get() const
|
|
{
|
|
BLI_assert(format.packed);
|
|
return vertex_len * format.stride;
|
|
}
|
|
|
|
void reference_add()
|
|
{
|
|
handle_refcount_++;
|
|
}
|
|
void reference_remove()
|
|
{
|
|
BLI_assert(handle_refcount_ > 0);
|
|
handle_refcount_--;
|
|
if (handle_refcount_ == 0) {
|
|
delete this;
|
|
}
|
|
}
|
|
|
|
virtual void update_sub(uint start, uint len, const void *data) = 0;
|
|
virtual const void *read() const = 0;
|
|
virtual void *unmap(const void *mapped_data) const = 0;
|
|
|
|
protected:
|
|
virtual void acquire_data() = 0;
|
|
virtual void resize_data() = 0;
|
|
virtual void release_data() = 0;
|
|
virtual void upload_data() = 0;
|
|
virtual void duplicate_data(VertBuf *dst) = 0;
|
|
};
|
|
|
|
/* Syntactic sugar. */
|
|
static inline GPUVertBuf *wrap(VertBuf *vert)
|
|
{
|
|
return reinterpret_cast<GPUVertBuf *>(vert);
|
|
}
|
|
static inline VertBuf *unwrap(GPUVertBuf *vert)
|
|
{
|
|
return reinterpret_cast<VertBuf *>(vert);
|
|
}
|
|
static inline const VertBuf *unwrap(const GPUVertBuf *vert)
|
|
{
|
|
return reinterpret_cast<const VertBuf *>(vert);
|
|
}
|
|
|
|
} // namespace blender::gpu
|