MangoHud/src/nvapi.cpp

67 lines
2.1 KiB
C++

#include <windows.h>
#include <iostream>
#include "nvidia_info.h"
#include "gpu.h"
// magic numbers, do not change them
#define NVAPI_MAX_PHYSICAL_GPUS 64
#define NVAPI_MAX_USAGES_PER_GPU 34
// function pointer types
typedef int *(*NvAPI_QueryInterface_t)(unsigned int offset);
typedef int (*NvAPI_Initialize_t)();
typedef int (*NvAPI_EnumPhysicalGPUs_t)(int **handles, int *count);
typedef int (*NvAPI_GPU_GetUsages_t)(int *handle, unsigned int *usages);
NvAPI_QueryInterface_t NvAPI_QueryInterface = NULL;
NvAPI_Initialize_t NvAPI_Initialize = NULL;
NvAPI_EnumPhysicalGPUs_t NvAPI_EnumPhysicalGPUs = NULL;
NvAPI_GPU_GetUsages_t NvAPI_GPU_GetUsages = NULL;
HMODULE hmod;
bool init_nvapi_bool;
int *gpuHandles[NVAPI_MAX_PHYSICAL_GPUS] = { NULL };
int gpuCount = 0;
unsigned int gpuUsages[NVAPI_MAX_USAGES_PER_GPU] = { 0 };
bool checkNVAPI(){
#if _WIN64
hmod = LoadLibraryA("nvapi64.dll");
#else
hmod = LoadLibraryA("nvapi.dll");
#endif
if (hmod == NULL)
{
printf("Failed to load nvapi.dll");
return false;
}
NvAPI_QueryInterface = (NvAPI_QueryInterface_t) GetProcAddress(hmod, "nvapi_QueryInterface");
NvAPI_Initialize = (NvAPI_Initialize_t) (*NvAPI_QueryInterface)(0x0150E828);
NvAPI_EnumPhysicalGPUs = (NvAPI_EnumPhysicalGPUs_t) (*NvAPI_QueryInterface)(0xE5AC921F);
NvAPI_GPU_GetUsages = (NvAPI_GPU_GetUsages_t) (*NvAPI_QueryInterface)(0x189A1FDF);
if (NvAPI_Initialize == NULL || NvAPI_EnumPhysicalGPUs == NULL ||
NvAPI_EnumPhysicalGPUs == NULL || NvAPI_GPU_GetUsages == NULL)
{
std::cerr << "Couldn't get functions in nvapi.dll" << std::endl;
return 2;
}
(*NvAPI_Initialize)();
int *gpuHandles[NVAPI_MAX_PHYSICAL_GPUS] = { NULL };
return true;
}
void nvapi_util()
{
if (!init_nvapi_bool){
init_nvapi_bool = checkNVAPI();
}
gpuUsages[0] = (NVAPI_MAX_USAGES_PER_GPU * 4) | 0x10000;
(*NvAPI_EnumPhysicalGPUs)(gpuHandles, &gpuCount);
(*NvAPI_GPU_GetUsages)(gpuHandles[0], gpuUsages);
gpu_info.load = gpuUsages[3];
}