widget/src/windows/nsScreenWin.cpp

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  37
  38 //
  39 // We have to do this in order to have access to the multiple-monitor
  40 // APIs that are only defined when WINVER is >= 0x0500. Don't worry,
  41 // these won't actually be called unless they are present.
  42 //
  43 #undef WINVER
  44 #define WINVER 0x0500
  45 #undef _WIN32_WINNT
  46 #define _WIN32_WINNT 0x0500
  47
  48 #include "nsScreenWin.h"
  49
  50 #ifdef WINCE
  51 #ifdef WINCE_WINDOWS_MOBILE
  52 #include "sipapi.h"
  53 #endif
  54 #define GetMonitorInfoW GetMonitorInfo
  55 #endif
  56
  57
  58 nsScreenWin :: nsScreenWin ( void* inScreen )
  59   : mScreen(inScreen)
  60 {
  61 #ifdef DEBUG
  62   HDC hDCScreen = ::GetDC(nsnull);
  63   NS_ASSERTION(hDCScreen,"GetDC Failure");
  64   NS_ASSERTION ( ::GetDeviceCaps(hDCScreen, TECHNOLOGY) == DT_RASDISPLAY, "Not a display screen");
  65   ::ReleaseDC(nsnull,hDCScreen);
  66 #endif
  67
  68   // nothing else to do. I guess we could cache a bunch of information
  69   // here, but we want to ask the device at runtime in case anything
  70   // has changed.
  71 }
  72
  73
  74 nsScreenWin :: ~nsScreenWin()
  75 {
  76   // nothing to see here.
  77 }
  78
  79
  80 // addref, release, QI
  81 NS_IMPL_ISUPPORTS1(nsScreenWin, nsIScreen)
  82
  83
  84 NS_IMETHODIMP
  85 nsScreenWin :: GetRect(PRInt32 *outLeft, PRInt32 *outTop, PRInt32 *outWidth, PRInt32 *outHeight)
  86 {
  87   BOOL success = FALSE;
  88 #if _MSC_VER >= 1200
  89   if ( mScreen ) {
  90     MONITORINFO info;
  91     info.cbSize = sizeof(MONITORINFO);
  92     success = ::GetMonitorInfoW( (HMONITOR)mScreen, &info );
  93     if ( success ) {
  94       *outLeft = info.rcMonitor.left;
  95       *outTop = info.rcMonitor.top;
  96       *outWidth = info.rcMonitor.right - info.rcMonitor.left;
  97       *outHeight = info.rcMonitor.bottom - info.rcMonitor.top;
  98     }
  99   }
 100 #endif
 101   if (!success) {
 102      HDC hDCScreen = ::GetDC(nsnull);
 103      NS_ASSERTION(hDCScreen,"GetDC Failure");
 104
 105      *outTop = *outLeft = 0;
 106      *outWidth = ::GetDeviceCaps(hDCScreen, HORZRES);
 107      *outHeight = ::GetDeviceCaps(hDCScreen, VERTRES);
 108
 109      ::ReleaseDC(nsnull, hDCScreen);
 110   }
 111   return NS_OK;
 112
 113 } // GetRect
 114
 115
 116 NS_IMETHODIMP
 117 nsScreenWin :: GetAvailRect(PRInt32 *outLeft, PRInt32 *outTop, PRInt32 *outWidth, PRInt32 *outHeight)
 118 {
 119   BOOL success = FALSE;
 120 #ifdef WINCE_WINDOWS_MOBILE
 121   SIPINFO sipInfo;
 122   memset(&sipInfo, 0, sizeof(SIPINFO));
 123   sipInfo.cbSize = sizeof(SIPINFO);
 124   if (SipGetInfo(&sipInfo) && !(sipInfo.fdwFlags & SIPF_OFF)) {
 125     *outLeft = sipInfo.rcVisibleDesktop.left;
 126     *outTop = sipInfo.rcVisibleDesktop.top;
 127     *outWidth = sipInfo.rcVisibleDesktop.right - sipInfo.rcVisibleDesktop.left;
 128     *outHeight = sipInfo.rcVisibleDesktop.bottom - sipInfo.rcVisibleDesktop.top;
 129     return NS_OK;
 130   }
 131 #endif
 132
 133 #if _MSC_VER >= 1200
 134   if ( mScreen ) {
 135     MONITORINFO info;
 136     info.cbSize = sizeof(MONITORINFO);
 137     success = ::GetMonitorInfoW( (HMONITOR)mScreen, &info );
 138     if ( success ) {
 139       *outLeft = info.rcWork.left;
 140       *outTop = info.rcWork.top;
 141       *outWidth = info.rcWork.right - info.rcWork.left;
 142       *outHeight = info.rcWork.bottom - info.rcWork.top;
 143     }
 144   }
 145 #endif
 146   if (!success) {
 147     RECT workArea;
 148     ::SystemParametersInfo(SPI_GETWORKAREA, 0, &workArea, 0);
 149     *outLeft = workArea.left;
 150     *outTop = workArea.top;
 151     *outWidth = workArea.right - workArea.left;
 152     *outHeight = workArea.bottom - workArea.top;
 153   }
 154
 155   return NS_OK;
 156
 157 } // GetAvailRect
 158
 159
 160
 161 NS_IMETHODIMP
 162 nsScreenWin :: GetPixelDepth(PRInt32 *aPixelDepth)
 163 {
 164   //XXX not sure how to get this info for multiple monitors, this might be ok...
 165   HDC hDCScreen = ::GetDC(nsnull);
 166   NS_ASSERTION(hDCScreen,"GetDC Failure");
 167
 168   PRInt32 depth = ::GetDeviceCaps(hDCScreen, BITSPIXEL);
 169   if (depth == 32) {
 170     // If a device uses 32 bits per pixel, it's still only using 8 bits
 171     // per color component, which is what our callers want to know.
 172     // (Some devices report 32 and some devices report 24.)
 173     depth = 24;
 174   }
 175   *aPixelDepth = depth;
 176
 177   ::ReleaseDC(nsnull, hDCScreen);
 178   return NS_OK;
 179
 180 } // GetPixelDepth
 181
 182
 183 NS_IMETHODIMP
 184 nsScreenWin :: GetColorDepth(PRInt32 *aColorDepth)
 185 {
 186   return GetPixelDepth(aColorDepth);
 187
 188 } // GetColorDepth
 189
 190