historical/toontown-classic.git/panda/include/shaderBuffer.I
2024-01-16 11:20:27 -06:00

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/**
* PANDA 3D SOFTWARE
* Copyright (c) Carnegie Mellon University. All rights reserved.
*
* All use of this software is subject to the terms of the revised BSD
* license. You should have received a copy of this license along
* with this source code in a file named "LICENSE."
*
* @file shaderBuffer.I
* @author rdb
* @date 2016-12-12
*/
/**
* Creates an uninitialized buffer object with the given size. For now, these
* parameters cannot be modified, but this may change in the future.
*/
INLINE ShaderBuffer::
ShaderBuffer(const std::string &name, uint64_t size, UsageHint usage_hint) :
Namable(name),
_data_size_bytes(size),
_usage_hint(usage_hint) {
}
/**
* Creates a buffer object initialized with the given data. For now, these
* parameters cannot be modified, but this may change in the future.
*/
INLINE ShaderBuffer::
ShaderBuffer(const std::string &name, vector_uchar initial_data, UsageHint usage_hint) :
Namable(name),
_data_size_bytes(initial_data.size()),
_usage_hint(usage_hint),
_initial_data(std::move(initial_data)) {
// Make sure it is padded to 16 bytes. Some drivers like that.
if ((_initial_data.size() & 15u) != 0) {
_initial_data.resize((_initial_data.size() + 15u) & ~15u, 0);
_data_size_bytes = _initial_data.size();
}
}
/**
* Returns the buffer size in bytes.
*/
INLINE uint64_t ShaderBuffer::
get_data_size_bytes() const {
return _data_size_bytes;
}
/**
* Returns the buffer usage hint.
*/
INLINE GeomEnums::UsageHint ShaderBuffer::
get_usage_hint() const {
return _usage_hint;
}
/**
* Returns a pointer to the initial buffer data, or NULL if not specified.
*/
INLINE const unsigned char *ShaderBuffer::
get_initial_data() const {
if (_initial_data.empty()) {
return nullptr;
} else {
return &_initial_data[0];
}
}