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#pragma once
#include "graphics/2d.h"
#include "UniformAligner.h"
namespace graphics {
namespace util {
class UniformBufferManager;
/**
* @brief Manages a uniform buffer memory range
*
* This class will be used by the uniform buffer manager for allowing user code direct access to uniform buffer memory.
* This also contains a UniformAligner which can be used for making sure that the data is aligned properly for GPU
* access.
*/
class UniformBuffer {
UniformBufferManager* _parent = nullptr;
size_t _parent_offset = 0;
gr_buffer_handle _buffer_handle;
UniformAligner _aligner;
public:
UniformBuffer();
UniformBuffer(UniformBufferManager* parent, size_t parent_offset, void* data_buffer, size_t buffer_size,
size_t element_size, size_t header_size, size_t element_alignment);
~UniformBuffer();
UniformBuffer(const UniformBuffer&) = delete;
UniformBuffer& operator=(const UniformBuffer&) = delete;
UniformBuffer(UniformBuffer&&) = default;
UniformBuffer& operator=(UniformBuffer&&) = default;
inline UniformAligner& aligner() {
return _aligner;
}
/**
* @brief Gets the buffer handle for use with gr_bind_uniform_buffer.
* @return The buffer handle
*/
gr_buffer_handle bufferHandle();
/**
* @brief Submits the data from the uniform aligner to the underlying buffer object.
*
* This should be called when you are done building the uniform data.
*/
void submitData();
/**
* @brief Given the offset into the memory buffer, returns the total offset in the buffer object
*
* This should be used for retrieving the correct offset for gr_bind_uniform_buffer.
*
* @param localOffset The offset into the local memory buffer (e.g. the return value of
* UniformAligner::getCurrentOffset)
* @return The absolute offset in the uniform buffer object.
*/
size_t getBufferOffset(size_t localOffset);
/**
* @brief Gets the absolute offset to the specified element in the aligner
* This should be used for retrieving the correct offset for gr_bind_uniform_buffer.
*
* @param index The element index to be retrieved
* @return The absolute offset in the uniform buffer object.
*/
size_t getAlignerElementOffset(size_t index);
/**
* @brief Gets the absolute offset of the current element in the aligner
* This should be used for retrieving the correct offset for gr_bind_uniform_buffer.
*
* @return The absolute offset in the uniform buffer object.
*/
size_t getCurrentAlignerOffset();
};
}
}
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