COSC-3P93-Project/Step 3/include/engine/util/memory_util.h

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/*
* Created by Brett Terpstra 6920201 on 03/12/22.
* Copyright (c) 2022 Brett Terpstra. All Rights Reserved.
*/
#ifndef STEP_3_MEMORY_UTIL_H
#define STEP_3_MEMORY_UTIL_H
#include <engine/util/std.h>
#define ENDIAN_FLIP
namespace Raytracing {
class MemoryConvert {
private:
public:
/**
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* returns the bytes from the type T ordered based on if ENDIAN_FLIP is defined or not
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*/
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template<typename T>
inline static std::vector<unsigned char> getBytes(T t) {
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std::vector<unsigned char> bytes;
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auto* asBytes = reinterpret_cast<unsigned char*>(&t);
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#ifdef ENDIAN_FLIP
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for (int i = 0; i < sizeof(T); i++)
bytes.push_back(asBytes[i]);
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#else
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for (int i = 0; i < sizeof(T); i++)
bytes.push_back(asBytes[sizeof(T) - i]);
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#endif
return bytes;
}
/**
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* Note: this is used for the GPU
* Converts the vector to single floating point format.
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* @param array array to write into
* @param offset offset of where to start writing into. Will update this value as it moves through the vector
* @param vec the vector to write
*/
inline static void writeVectorBytes(unsigned char* array, size_t& offset, const Vec4& vec) {
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auto x = getBytes((float) vec.x());
auto y = getBytes((float) vec.y());
auto z = getBytes((float) vec.z());
auto w = getBytes((float) vec.w());
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// write the bytes as a packed vector.
for (auto b: x)
array[offset++] = b;
for (auto b: y)
array[offset++] = b;
for (auto b: z)
array[offset++] = b;
for (auto b: w)
array[offset++] = b;
}
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/**
* Note: this is used for the GPU.
* @param array array to write into
* @param offset offset of where to start writing into. Will update this value as it moves through the vector
* @param integer the int to write
*/
template<typename T>
inline static void writeBytes(unsigned char* array, size_t& offset, const T t) {
auto x = getBytes(t);
for (auto b: x)
array[offset++] = b;
}
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};
}
#endif //STEP_3_MEMORY_UTIL_H