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/*
* 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.
*
* Copyright 2020, Blender Foundation.
*/
/** \file
* \ingroup gpu
*/
#pragma once
#include "BLI_sys_types.h"
namespace blender {
namespace gpu {
#ifdef DEBUG
# define DEBUG_NAME_LEN 64
#else
# define DEBUG_NAME_LEN 8
#endif
/**
* Implementation of Uniform Buffers.
* Base class which is then specialized for each implementation (GL, VK, ...).
**/
class UniformBuf {
protected:
/** Data size in bytes. */
size_t size_in_bytes_;
/** Continuous memory block to copy to GPU. This data is owned by the UniformBuf. */
void *data_ = NULL;
/** Debugging name */
char name_[DEBUG_NAME_LEN];
public:
UniformBuf(size_t size, const char *name);
virtual ~UniformBuf();
virtual void update(const void *data) = 0;
virtual void bind(int slot) = 0;
virtual void unbind(void) = 0;
/** Used to defer data upload at drawing time.
* This is useful if the thread has no context bound.
* This transfers ownership to this UniformBuf. */
void attach_data(void *data)
{
data_ = data;
}
};
/* Syntacting suggar. */
static inline GPUUniformBuf *wrap(UniformBuf *vert)
{
return reinterpret_cast<GPUUniformBuf *>(vert);
}
static inline UniformBuf *unwrap(GPUUniformBuf *vert)
{
return reinterpret_cast<UniformBuf *>(vert);
}
static inline const UniformBuf *unwrap(const GPUUniformBuf *vert)
{
return reinterpret_cast<const UniformBuf *>(vert);
}
#undef DEBUG_NAME_LEN
} // namespace gpu
} // namespace blender
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