windows/multimon.c

   1 /*
   2  * Multimonitor APIs
   3  *
   4  * Copyright 1998 Turchanov Sergey
   5  */
   6
   7 #include "winbase.h"
   8 #include "winuser.h"
   9 #include "monitor.h"
  10
  11 /**********************************************************************/
  12
  13 #define xPRIMARY_MONITOR ((HMONITOR)0x12340042)
  14
  15 MONITOR MONITOR_PrimaryMonitor;
  16
  17 /***********************************************************************
  18  *              MONITOR_Initialize
  19  */
  20 void MONITOR_Initialize(MONITOR *pMonitor)
  21 {
  22   pMonitor->pDriver->pInitialize(pMonitor);
  23 }
  24
  25 /***********************************************************************
  26  *              MONITOR_Finalize
  27  */
  28 void MONITOR_Finalize(MONITOR *pMonitor)
  29 {
  30   pMonitor->pDriver->pFinalize(pMonitor);
  31 }
  32
  33 /***********************************************************************
  34  *              MONITOR_GetWidth
  35  */
  36 int MONITOR_GetWidth(MONITOR *pMonitor)
  37 {
  38   return pMonitor->pDriver->pGetWidth(pMonitor);
  39 }
  40
  41 /***********************************************************************
  42  *              MONITOR_GetHeight
  43  */
  44 int MONITOR_GetHeight(MONITOR *pMonitor)
  45 {
  46   return pMonitor->pDriver->pGetHeight(pMonitor);
  47 }
  48
  49 /***********************************************************************
  50  *              MONITOR_GetDepth
  51  */
  52 int MONITOR_GetDepth(MONITOR *pMonitor)
  53 {
  54   return pMonitor->pDriver->pGetDepth(pMonitor);
  55 }
  56
  57 /**********************************************************************/
  58
  59 HMONITOR WINAPI MonitorFromPoint(POINT ptScreenCoords, DWORD dwFlags)
  60 {
  61     if ((dwFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST)) ||
  62         ((ptScreenCoords.x >= 0) &&
  63         (ptScreenCoords.x < GetSystemMetrics(SM_CXSCREEN)) &&
  64         (ptScreenCoords.y >= 0) &&
  65         (ptScreenCoords.y < GetSystemMetrics(SM_CYSCREEN))))
  66     {
  67         return xPRIMARY_MONITOR;
  68     }
  69         return NULL;
  70 }
  71
  72 HMONITOR WINAPI MonitorFromRect(LPRECT lprcScreenCoords, DWORD dwFlags)
  73 {
  74     if ((dwFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST)) ||
  75         ((lprcScreenCoords->right > 0) &&
  76         (lprcScreenCoords->bottom > 0) &&
  77         (lprcScreenCoords->left < GetSystemMetrics(SM_CXSCREEN)) &&
  78         (lprcScreenCoords->top < GetSystemMetrics(SM_CYSCREEN))))
  79     {
  80         return xPRIMARY_MONITOR;
  81     }
  82     return NULL;
  83 }
  84
  85 HMONITOR WINAPI MonitorFromWindow(HWND hWnd, DWORD dwFlags)
  86 {
  87     WINDOWPLACEMENT wp;
  88
  89     if (dwFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST))
  90         return xPRIMARY_MONITOR;
  91
  92     if (IsIconic(hWnd) ?
  93             GetWindowPlacement(hWnd, &wp) :
  94             GetWindowRect(hWnd, &wp.rcNormalPosition)) {
  95
  96         return MonitorFromRect(&wp.rcNormalPosition, dwFlags);
  97     }
  98
  99     return NULL;
 100 }
 101
 102 BOOL WINAPI GetMonitorInfoA(HMONITOR hMonitor, LPMONITORINFO lpMonitorInfo)
 103 {
 104     RECT rcWork;
 105
 106     if ((hMonitor == xPRIMARY_MONITOR) &&
 107         lpMonitorInfo &&
 108         (lpMonitorInfo->cbSize >= sizeof(MONITORINFO)) &&
 109         SystemParametersInfoA(SPI_GETWORKAREA, 0, &rcWork, 0))
 110     {
 111         lpMonitorInfo->rcMonitor.left = 0;
 112         lpMonitorInfo->rcMonitor.top  = 0;
 113         lpMonitorInfo->rcMonitor.right  = GetSystemMetrics(SM_CXSCREEN);
 114         lpMonitorInfo->rcMonitor.bottom = GetSystemMetrics(SM_CYSCREEN);
 115         lpMonitorInfo->rcWork = rcWork;
 116         lpMonitorInfo->dwFlags = MONITORINFOF_PRIMARY;
 117
 118         if (lpMonitorInfo->cbSize >= sizeof(MONITORINFOEXA))
 119             lstrcpyA(((MONITORINFOEXA*)lpMonitorInfo)->szDevice, "DISPLAY");
 120
 121         return TRUE;
 122     }
 123
 124     return FALSE;
 125 }
 126
 127 BOOL WINAPI GetMonitorInfoW(HMONITOR hMonitor, LPMONITORINFO lpMonitorInfo)
 128 {
 129     RECT rcWork;
 130
 131     if ((hMonitor == xPRIMARY_MONITOR) &&
 132         lpMonitorInfo &&
 133         (lpMonitorInfo->cbSize >= sizeof(MONITORINFO)) &&
 134         SystemParametersInfoW(SPI_GETWORKAREA, 0, &rcWork, 0))
 135     {
 136         lpMonitorInfo->rcMonitor.left = 0;
 137         lpMonitorInfo->rcMonitor.top  = 0;
 138         lpMonitorInfo->rcMonitor.right  = GetSystemMetrics(SM_CXSCREEN);
 139         lpMonitorInfo->rcMonitor.bottom = GetSystemMetrics(SM_CYSCREEN);
 140         lpMonitorInfo->rcWork = rcWork;
 141         lpMonitorInfo->dwFlags = MONITORINFOF_PRIMARY;
 142
 143         if (lpMonitorInfo->cbSize >= sizeof(MONITORINFOEXW))
 144             lstrcpyW(((MONITORINFOEXW*)lpMonitorInfo)->szDevice, (LPCWSTR)"D\0I\0S\0P\0L\0A\0Y\0\0");
 145
 146         return TRUE;
 147     }
 148
 149     return FALSE;
 150 }
 151
 152 BOOL WINAPI EnumDisplayMonitors(
 153         HDC             hdcOptionalForPainting,
 154         LPRECT         lprcEnumMonitorsThatIntersect,
 155         MONITORENUMPROC lpfnEnumProc,
 156         LPARAM          dwData)
 157 {
 158     RECT rcLimit;
 159
 160     if (!lpfnEnumProc)
 161         return FALSE;
 162
 163     rcLimit.left   = 0;
 164     rcLimit.top    = 0;
 165     rcLimit.right  = GetSystemMetrics(SM_CXSCREEN);
 166     rcLimit.bottom = GetSystemMetrics(SM_CYSCREEN);
 167
 168     if (hdcOptionalForPainting)
 169     {
 170         RECT    rcClip;
 171         POINT   ptOrg;
 172
 173         switch (GetClipBox(hdcOptionalForPainting, &rcClip))
 174         {
 175         default:
 176             if (!GetDCOrgEx(hdcOptionalForPainting, &ptOrg))
 177                 return FALSE;
 178
 179             OffsetRect(&rcLimit, -ptOrg.x, -ptOrg.y);
 180             if (IntersectRect(&rcLimit, &rcLimit, &rcClip) &&
 181                 (!lprcEnumMonitorsThatIntersect ||
 182                      IntersectRect(&rcLimit, &rcLimit, lprcEnumMonitorsThatIntersect))) {
 183
 184                 break;
 185             }
 186             /*fall thru */
 187         case NULLREGION:
 188              return TRUE;
 189         case ERROR:
 190              return FALSE;
 191         }
 192     } else {
 193         if (    lprcEnumMonitorsThatIntersect &&
 194                 !IntersectRect(&rcLimit, &rcLimit, lprcEnumMonitorsThatIntersect)) {
 195
 196             return TRUE;
 197         }
 198     }
 199
 200     return lpfnEnumProc(
 201             xPRIMARY_MONITOR,
 202             hdcOptionalForPainting,
 203             &rcLimit,
 204             dwData);
 205 }