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