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