在 Windows XP/7 中获取 EDID 的 Win32 代码
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原文地址: http://stackoverflow.com/questions/6363699/
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Win32 code to get EDID in Windows XP/7
提问by Jared Updike
I found thispage and was unable to get any useful information out of it (it searches the registry for something but never finds it and goes into an infinite loop).
我找到了这个页面，但无法从中获取任何有用的信息（它在注册表中搜索某些内容，但从未找到它并进入无限循环）。
As this question regarding getting the monitor serial UID ("EDID information")asks I would like the same information but from the point of view of Win32 C code (or C/C++ DDKcode, or whatever) instead of Linux.
由于这个关于获取监视器串行 UID（“EDID 信息”）的问题要求我提供相同的信息，但从 Win32 C 代码（或 C/C++ DDK代码或其他代码）而不是 Linux的角度来看。
回答by Jared Updike
First I got a C# version working using WMI Code Creator:
首先，我使用WMI Code Creator获得了一个 C# 版本：
try
{
ManagementObjectSearcher searcher =
new ManagementObjectSearcher("root\WMI",
"SELECT * FROM WmiMonitorID");
foreach (ManagementObject queryObj in searcher.Get())
{
Console.WriteLine("-----------------------------------");
Console.WriteLine("WmiMonitorID instance");
Console.WriteLine("-----------------------------------");
//Console.WriteLine("Active: {0}", queryObj["Active"]);
Console.WriteLine("InstanceName: {0}", queryObj["InstanceName"]);
dynamic snid = queryObj["SerialNumberID"];
Console.WriteLine("SerialNumberID: (length) {0}", snid.Length);
Console.WriteLine("YearOfManufacture: {0}", queryObj["YearOfManufacture"]);
dynamic code = queryObj["ProductCodeID"];
string pcid = "";
for (int i = 0; i < code.Length; i++)
{
pcid = pcid + Char.ConvertFromUtf32(code[i]);
//pcid = pcid +code[i].ToString("X4");
}
Console.WriteLine("ProductCodeID: " + pcid);
}
}
catch (ManagementException e)
{
Console.WriteLine("An error occurred while querying for WMI data: " + e.Message);
}
Below is the C++ code I foundand tweaked to work with the InstanceName field in WmiMonitorIDclass (EDID structure) that I wanted to read. Don't forget to add setupapi.lib to your Linker > Additional Libraries build setting.
下面是我发现并调整以使用WmiMonitorID类（EDID 结构）中的 InstanceName 字段的 C++ 代码，我想阅读。不要忘记将 setupapi.lib 添加到您的 Linker > Additional Libraries 构建设置。
#define _WIN32_DCOM
#include <iostream>
using namespace std;
#include <wbemidl.h>
# pragma comment(lib, "wbemuuid.lib")
int EnumMonitorIDs()
{
ret.clear();
HRESULT hres = CoInitializeEx(0, COINIT_MULTITHREADED);
if (FAILED(hres))
{
cout << "Failed to initialize COM library. Error code = 0x"
<< hex << hres << endl;
return 1; // Program has failed.
}
hres = CoInitializeSecurity(
NULL,
-1, // COM authentication
NULL, // Authentication services
NULL, // Reserved
RPC_C_AUTHN_LEVEL_DEFAULT, // Default authentication
RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation
NULL, // Authentication info
EOAC_NONE, // Additional capabilities
NULL // Reserved
);
if (FAILED(hres))
{
cout << "Failed to initialize security. Error code = 0x"
<< hex << hres << endl;
CoUninitialize();
return 1;
}
IWbemLocator *pLoc = NULL;
hres = CoCreateInstance(
CLSID_WbemLocator,
0,
CLSCTX_INPROC_SERVER,
IID_IWbemLocator, (LPVOID *) &pLoc);
if (FAILED(hres))
{
cout << "Failed to create IWbemLocator object."
<< " Err code = 0x"
<< hex << hres << endl;
CoUninitialize();
return 1; // Program has failed.
}
IWbemServices *pSvc = NULL;
BSTR AbackB = SysAllocString(L"root\WMI");
// Connect to the root\cimv2 namespace with
// the current user and obtain pointer pSvc
// to make IWbemServices calls.
hres = pLoc->ConnectServer(
AbackB, // Object path of WMI namespace
NULL, // User name. NULL = current user
NULL, // User password. NULL = current
0, // Locale. NULL indicates current
NULL, // Security flags.
0, // Authority (e.g. Kerberos)
0, // Context object
&pSvc // pointer to IWbemServices proxy
);
SysFreeString(AbackB);
if (FAILED(hres))
{
cout << "Could not connect. Error code = 0x"
<< hex << hres << endl;
pLoc->Release();
CoUninitialize();
return 1; // Program has failed.
}
hres = CoSetProxyBlanket(
pSvc, // Indicates the proxy to set
RPC_C_AUTHN_WINNT, // RPC_C_AUTHN_xxx
RPC_C_AUTHZ_NONE, // RPC_C_AUTHZ_xxx
NULL, // Server principal name
RPC_C_AUTHN_LEVEL_CALL, // RPC_C_AUTHN_LEVEL_xxx
RPC_C_IMP_LEVEL_IMPERSONATE, // RPC_C_IMP_LEVEL_xxx
NULL, // client identity
EOAC_NONE // proxy capabilities
);
if (FAILED(hres))
{
cout << "Could not set proxy blanket. Error code = 0x"
<< hex << hres << endl;
pSvc->Release();
pLoc->Release();
CoUninitialize();
return 1; // Program has failed.
}
BSTR wql = SysAllocString(L"WQL");
BSTR select = SysAllocString(L"SELECT * FROM WmiMonitorID");
IEnumWbemClassObject* pEnumerator = NULL;
hres = pSvc->ExecQuery(
wql,
select,
WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
NULL,
&pEnumerator);
SysFreeString(wql);
SysFreeString(select);
if (FAILED(hres))
{
cout << "Query for operating system name failed."
<< " Error code = 0x"
<< hex << hres << endl;
pSvc->Release();
pLoc->Release();
CoUninitialize();
return 1; // Program has failed.
}
IWbemClassObject *pclsObj = 0;
ULONG uReturn = 0;
while (pEnumerator)
{
HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1,
&pclsObj, &uReturn);
if (0 == uReturn)
{
break;
}
// ok, we have the EDID record, pull some fields out of it
VARIANT vtProp;
hr = pclsObj->Get(L"InstanceName", 0, &vtProp, 0, 0);
wcout << "----------------" << endl << "InstanceName : " << vtProp.bstrVal << endl;
VariantClear(&vtProp);
pclsObj->Release();
}
pSvc->Release();
pLoc->Release();
pEnumerator->Release();
CoUninitialize();
return 0;
}
回答by Ofek Shilon
WMI didn't support monitor classes in Windows XP. The documented way of getting the EDID was - and still is - with the Setup API.
WMI 不支持 Windows XP 中的监视器类。获取 EDID 的文档化方法是 - 而且仍然是 - 使用 Setup API。
Longer survey and a VC++ code sample are available here.
更长的调查和 VC++ 代码示例可在此处获得。
回答by Jared Updike
Based on Ofek Shilon's blog post, and tweaked to get all the device IDs (manufacturer ID + product ID strings):
基于 Ofek Shilon 的博客文章，并经过调整以获取所有设备 ID（制造商 ID + 产品 ID 字符串）：
DISPLAY_DEVICE dd;
dd.cb = sizeof(dd);
DWORD dev = 0; // device index
int id = 1; // monitor number, as used by Display Properties > Settings
Str DeviceID;
while (EnumDisplayDevices(0, dev, &dd, 0))
{
DISPLAY_DEVICE ddMon;
ZeroMemory(&ddMon, sizeof(ddMon));
ddMon.cb = sizeof(ddMon);
DWORD devMon = 0;
while (EnumDisplayDevices(dd.DeviceName, devMon, &ddMon, 0))
{
DeviceID.Sprintf("%s", ddMon.DeviceID);
DeviceID = DeviceID.Slice(8);
if (DeviceID.Index("\") > 0)
DeviceID = DeviceID.Slice(0, DeviceID.Index("\"));
printf ("DEVICEID = %s --------\n", DeviceID.utf8());
}
devMon++;
ZeroMemory(&ddMon, sizeof(ddMon));
ddMon.cb = sizeof(ddMon);
}
ZeroMemory(&dd, sizeof(dd));
dd.cb = sizeof(dd);
dev++;
}
N.B. Str here is a custom string class but should be easy to refactor to use anything.
NB Str 这里是一个自定义字符串类，但应该很容易重构以使用任何东西。
