gecko-dev/widget/windows/nsScreenWin.cpp
2012-01-05 16:52:22 +09:00

154 lines
4.6 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
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*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2000
* the Initial Developer. All Rights Reserved.
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* Contributor(s):
*
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* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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#include "nsScreenWin.h"
nsScreenWin :: nsScreenWin ( HMONITOR inScreen )
: mScreen(inScreen)
{
#ifdef DEBUG
HDC hDCScreen = ::GetDC(nsnull);
NS_ASSERTION(hDCScreen,"GetDC Failure");
NS_ASSERTION ( ::GetDeviceCaps(hDCScreen, TECHNOLOGY) == DT_RASDISPLAY, "Not a display screen");
::ReleaseDC(nsnull,hDCScreen);
#endif
// nothing else to do. I guess we could cache a bunch of information
// here, but we want to ask the device at runtime in case anything
// has changed.
}
nsScreenWin :: ~nsScreenWin()
{
// nothing to see here.
}
NS_IMETHODIMP
nsScreenWin :: GetRect(PRInt32 *outLeft, PRInt32 *outTop, PRInt32 *outWidth, PRInt32 *outHeight)
{
BOOL success = FALSE;
if ( mScreen ) {
MONITORINFO info;
info.cbSize = sizeof(MONITORINFO);
success = ::GetMonitorInfoW( mScreen, &info );
if ( success ) {
*outLeft = info.rcMonitor.left;
*outTop = info.rcMonitor.top;
*outWidth = info.rcMonitor.right - info.rcMonitor.left;
*outHeight = info.rcMonitor.bottom - info.rcMonitor.top;
}
}
if (!success) {
HDC hDCScreen = ::GetDC(nsnull);
NS_ASSERTION(hDCScreen,"GetDC Failure");
*outTop = *outLeft = 0;
*outWidth = ::GetDeviceCaps(hDCScreen, HORZRES);
*outHeight = ::GetDeviceCaps(hDCScreen, VERTRES);
::ReleaseDC(nsnull, hDCScreen);
}
return NS_OK;
} // GetRect
NS_IMETHODIMP
nsScreenWin :: GetAvailRect(PRInt32 *outLeft, PRInt32 *outTop, PRInt32 *outWidth, PRInt32 *outHeight)
{
BOOL success = FALSE;
if ( mScreen ) {
MONITORINFO info;
info.cbSize = sizeof(MONITORINFO);
success = ::GetMonitorInfoW( mScreen, &info );
if ( success ) {
*outLeft = info.rcWork.left;
*outTop = info.rcWork.top;
*outWidth = info.rcWork.right - info.rcWork.left;
*outHeight = info.rcWork.bottom - info.rcWork.top;
}
}
if (!success) {
RECT workArea;
::SystemParametersInfo(SPI_GETWORKAREA, 0, &workArea, 0);
*outLeft = workArea.left;
*outTop = workArea.top;
*outWidth = workArea.right - workArea.left;
*outHeight = workArea.bottom - workArea.top;
}
return NS_OK;
} // GetAvailRect
NS_IMETHODIMP
nsScreenWin :: GetPixelDepth(PRInt32 *aPixelDepth)
{
//XXX not sure how to get this info for multiple monitors, this might be ok...
HDC hDCScreen = ::GetDC(nsnull);
NS_ASSERTION(hDCScreen,"GetDC Failure");
PRInt32 depth = ::GetDeviceCaps(hDCScreen, BITSPIXEL);
if (depth == 32) {
// If a device uses 32 bits per pixel, it's still only using 8 bits
// per color component, which is what our callers want to know.
// (Some devices report 32 and some devices report 24.)
depth = 24;
}
*aPixelDepth = depth;
::ReleaseDC(nsnull, hDCScreen);
return NS_OK;
} // GetPixelDepth
NS_IMETHODIMP
nsScreenWin :: GetColorDepth(PRInt32 *aColorDepth)
{
return GetPixelDepth(aColorDepth);
} // GetColorDepth