mirror of https://github.com/doitsujin/dxvk
82 lines
1.8 KiB
C++
82 lines
1.8 KiB
C++
#pragma once
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#include "dxvk_include.h"
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namespace dxvk {
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class DxvkDataSlice;
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/**
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* \brief Data buffer
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*
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* Provides a fixed-size buffer with a linear memory
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* allocator for arbitrary data. Can be used to copy
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* data to or from resources. Note that allocations
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* will be aligned to a cache line boundary.
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*/
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class DxvkDataBuffer : public RcObject {
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friend class DxvkDataSlice;
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public:
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DxvkDataBuffer();
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DxvkDataBuffer(size_t size);
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~DxvkDataBuffer();
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/**
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* \brief Allocates a slice
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*
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* If the desired slice length is larger than the
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* number of bytes left in the buffer, this will
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* fail and the returned slice points to \c nullptr.
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* \param [in] n Number of bytes to allocate
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* \returns The slice, or an empty slice on failure
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*/
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DxvkDataSlice alloc(size_t n);
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private:
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char* m_data = nullptr;
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size_t m_size = 0;
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size_t m_offset = 0;
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};
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/**
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* \brief Data buffer slice
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*
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* A slice of a \ref DxvkDataBuffer which stores
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* a strong reference to the backing buffer object.
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*/
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class DxvkDataSlice {
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public:
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DxvkDataSlice() { }
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DxvkDataSlice(
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const Rc<DxvkDataBuffer>& buffer,
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size_t offset,
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size_t length)
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: m_buffer(buffer),
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m_offset(offset),
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m_length(length) { }
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void* ptr() const {
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return m_buffer != nullptr
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? m_buffer->m_data + m_offset
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: nullptr;
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}
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size_t offset() const { return m_offset; }
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size_t length() const { return m_length; }
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private:
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Rc<DxvkDataBuffer> m_buffer;
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size_t m_offset = 0;
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size_t m_length = 0;
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};
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} |