关于屏幕分辨率的一些操作

MonitorAdapter.h

#include <atlstr.h>#include <vector>#include <WinDef.h>#include <tchar.h>using std::vector;using namespace std;#define MAX_MONITOR_NAME 256static std::vector<HMONITOR> g_hMonitorGroup;  // 显示器模式信息typedef struct MonitorModeInfo_t{unsigned int m_nWidth;    unsigned int m_nHeight;MonitorModeInfo_t(int nWidth, int nHeight) : m_nWidth(nWidth), m_nHeight(nHeight) {}}MonitorModeInfo;// 显示器信息struct MonitorInfo{TCHAR szDevice[MAX_MONITOR_NAME];// 显示器名称std::vector<MonitorModeInfo> m_vecModeInfo;// 当前名称的显示器支持的分辨率模式};typedef std::vector<MonitorInfo> VEC_MONITORMODE_INFO;  // 所有的显示器信息class MonitorAdapter{public:MonitorAdapter();~MonitorAdapter();// 回调函数static int CALLBACK MonitorEnumProc(HMONITOR hMonitor, HDC hdc,LPRECT lpRMonitor,LPARAM dwData);// 得到所有显示器的名称void GetAllMonitorName(VEC_MONITORMODE_INFO& m_vecMonitorListInfo);// 得到所有显示器的模式void GetAllDisplayMode(VEC_MONITORMODE_INFO& m_vecMonitorListInfo);//得到屏幕当前分辨率void GetCurrentReselotion(int& nWidth,int& nHeight,int& nFreq,int& nBits);//修改分辨率int ChangMonitorReselotion(HMONITOR hMonitor,const int nWidth,const int nHight,const int nFre,const int nColorBits);};

MonitorAdapter.cpp

#include "stdafx.h"#include "MonitorAdapter.h"MonitorAdapter::MonitorAdapter(void){}MonitorAdapter::~MonitorAdapter(void){}int CALLBACK MonitorAdapter::MonitorEnumProc(HMONITOR hMonitor,  HDC hdc, LPRECT lpRMonitor, LPARAM dwData){g_hMonitorGroup.push_back(hMonitor);return 1;}// 得到所有显示器的名称void MonitorAdapter::GetAllMonitorName(VEC_MONITORMODE_INFO& vecMonitorListInfo){g_hMonitorGroup.clear();::EnumDisplayMonitors(NULL, NULL, MonitorEnumProc, 0);//vector<HMONITOR>::iterator ithMoniter = g_hMonitorGroup.begin();for(int i = 0; i < g_hMonitorGroup.size();i++){MONITORINFOEX mixTemp;memset(&mixTemp, 0, sizeof(MONITORINFOEX));mixTemp.cbSize = sizeof(MONITORINFOEX);GetMonitorInfo(g_hMonitorGroup[i], &mixTemp);VEC_MONITORMODE_INFO::iterator itBeg = vecMonitorListInfo.begin();VEC_MONITORMODE_INFO::iterator itEnd = vecMonitorListInfo.end();for(; itBeg != itEnd; ++itBeg){if( 0 == _tcscmp(mixTemp.szDevice, itBeg->szDevice)){break;}}//没有在列表中找到,则需要添加if (itBeg == itEnd)   {MonitorInfo tmpMonitorInfo;_tcscpy_s(tmpMonitorInfo.szDevice, sizeof(tmpMonitorInfo.szDevice), mixTemp.szDevice);vecMonitorListInfo.push_back(tmpMonitorInfo);}} }// 得到所有显示器的模式void MonitorAdapter::GetAllDisplayMode(VEC_MONITORMODE_INFO& vecMonitorListInfo){GetAllMonitorName(vecMonitorListInfo);bool bRetVal;DEVMODE  devmode;VEC_MONITORMODE_INFO::iterator itBeg = vecMonitorListInfo.begin();VEC_MONITORMODE_INFO::iterator itEnd = vecMonitorListInfo.end();for (NULL; itBeg != itEnd; ++itBeg){int iMode = 0;do{bRetVal = ::EnumDisplaySettings(itBeg->szDevice, iMode, &devmode);iMode++;if (bRetVal){bool bFind = false;vector<MonitorModeInfo>::iterator itBeg_Mode = itBeg->m_vecModeInfo.begin();vector<MonitorModeInfo>::iterator itEnd_Mode = itBeg->m_vecModeInfo.end();for (NULL; itBeg_Mode != itEnd_Mode; ++itBeg_Mode){// 如果已经在列表中找到,则结束本次循环if ((itBeg_Mode->m_nWidth == devmode.dmPelsWidth) && (itBeg_Mode->m_nHeight == devmode.dmPelsHeight)){bFind = true;break;}// 插入数据时,从 大到小排列 (按windows 分辨率设置,优先比较 宽) if ((itBeg_Mode->m_nWidth < devmode.dmPelsWidth) ||((itBeg_Mode->m_nWidth == devmode.dmPelsWidth) && (itBeg_Mode->m_nHeight < devmode.dmPelsHeight))){ break;}}if(!bFind){if (itBeg_Mode == itEnd_Mode){itBeg->m_vecModeInfo.push_back(MonitorModeInfo(devmode.dmPelsWidth, devmode.dmPelsHeight)); }else{itBeg->m_vecModeInfo.insert(itBeg_Mode, MonitorModeInfo(devmode.dmPelsWidth, devmode.dmPelsHeight)); }}}}while (bRetVal); } }int MonitorAdapter::ChangMonitorReselotion(HMONITOR hMonitor,const int nWidth,const int nHight,const int nFre,const int nColorBits){if ( NULL == hMonitor ){return -1;}MONITORINFOEX mi;mi.cbSize = sizeof(mi);GetMonitorInfo( hMonitor , &mi);DEVMODE DeviceMode;ZeroMemory(&DeviceMode, sizeof(DEVMODE));DeviceMode.dmSize = sizeof(DEVMODE); BOOL bFlag = TRUE;bFlag = EnumDisplaySettings(mi.szDevice, ENUM_CURRENT_SETTINGS, &DeviceMode);if ( bFlag != TRUE ){return -1;}if (DeviceMode.dmPelsWidth == nWidth && DeviceMode.dmPelsHeight == nHight ){return 0;}DeviceMode.dmDisplayFlags = 0;DeviceMode.dmPelsWidth= nWidth;DeviceMode.dmPelsHeight = nHight;DeviceMode.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT | DM_BITSPERPEL | DM_DISPLAYFREQUENCY ;int nRet = ChangeDisplaySettingsEx(mi.szDevice, &DeviceMode, NULL, CDS_GLOBAL | CDS_NORESET | CDS_UPDATEREGISTRY, NULL);if (DISP_CHANGE_BADMODE == nRet){ChangeDisplaySettingsEx(mi.szDevice, &DeviceMode, NULL, CDS_GLOBAL | CDS_NORESET | CDS_UPDATEREGISTRY, NULL);}if ( DISP_CHANGE_SUCCESSFUL == nRet ){return 0;}return -1;}void MonitorAdapter::GetCurrentReselotion(int& nWidth,int& nHeight,int& nFreq,int& nBits){DEVMODE DeviceMode;EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &DeviceMode);nWidth = DeviceMode.dmPelsWidth;nHeight = DeviceMode.dmPelsHeight;nFreq = DeviceMode.dmDisplayFrequency;nBits = DeviceMode.dmBitsPerPel;}