michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "nsScreenWin.h"
michael@0: #include "nsCoord.h"
michael@0: #include "gfxWindowsPlatform.h"
michael@0: #include "nsIWidget.h"
michael@0: 
michael@0: 
michael@0: nsScreenWin :: nsScreenWin ( HMONITOR inScreen )
michael@0:   : mScreen(inScreen)
michael@0: {
michael@0: #ifdef DEBUG
michael@0:   HDC hDCScreen = ::GetDC(nullptr);
michael@0:   NS_ASSERTION(hDCScreen,"GetDC Failure");
michael@0:   NS_ASSERTION ( ::GetDeviceCaps(hDCScreen, TECHNOLOGY) == DT_RASDISPLAY, "Not a display screen");
michael@0:   ::ReleaseDC(nullptr,hDCScreen);
michael@0: #endif
michael@0: 
michael@0:   // nothing else to do. I guess we could cache a bunch of information
michael@0:   // here, but we want to ask the device at runtime in case anything
michael@0:   // has changed.
michael@0: }
michael@0: 
michael@0: 
michael@0: nsScreenWin :: ~nsScreenWin()
michael@0: {
michael@0:   // nothing to see here.
michael@0: }
michael@0: 
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsScreenWin :: GetRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *outHeight)
michael@0: {
michael@0:   BOOL success = FALSE;
michael@0:   if ( mScreen ) {
michael@0:     MONITORINFO info;
michael@0:     info.cbSize = sizeof(MONITORINFO);
michael@0:     success = ::GetMonitorInfoW( mScreen, &info );
michael@0:     if ( success ) {
michael@0:       *outLeft = info.rcMonitor.left;
michael@0:       *outTop = info.rcMonitor.top;
michael@0:       *outWidth = info.rcMonitor.right - info.rcMonitor.left;
michael@0:       *outHeight = info.rcMonitor.bottom - info.rcMonitor.top;
michael@0:     }
michael@0:   }
michael@0:   if (!success) {
michael@0:      HDC hDCScreen = ::GetDC(nullptr);
michael@0:      NS_ASSERTION(hDCScreen,"GetDC Failure");
michael@0:     
michael@0:      *outTop = *outLeft = 0;
michael@0:      *outWidth = ::GetDeviceCaps(hDCScreen, HORZRES);
michael@0:      *outHeight = ::GetDeviceCaps(hDCScreen, VERTRES); 
michael@0:      
michael@0:      ::ReleaseDC(nullptr, hDCScreen);
michael@0:   }
michael@0:   return NS_OK;
michael@0: 
michael@0: } // GetRect
michael@0: 
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsScreenWin :: GetAvailRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *outHeight)
michael@0: {
michael@0:   BOOL success = FALSE;
michael@0: 
michael@0:   if ( mScreen ) {
michael@0:     MONITORINFO info;
michael@0:     info.cbSize = sizeof(MONITORINFO);
michael@0:     success = ::GetMonitorInfoW( mScreen, &info );
michael@0:     if ( success ) {
michael@0:       *outLeft = info.rcWork.left;
michael@0:       *outTop = info.rcWork.top;
michael@0:       *outWidth = info.rcWork.right - info.rcWork.left;
michael@0:       *outHeight = info.rcWork.bottom - info.rcWork.top;
michael@0:     }
michael@0:   }
michael@0:   if (!success) {
michael@0:     RECT workArea;
michael@0:     ::SystemParametersInfo(SPI_GETWORKAREA, 0, &workArea, 0);
michael@0:     *outLeft = workArea.left;
michael@0:     *outTop = workArea.top;
michael@0:     *outWidth = workArea.right - workArea.left;
michael@0:     *outHeight = workArea.bottom - workArea.top;
michael@0:   }
michael@0: 
michael@0:   return NS_OK;
michael@0:   
michael@0: } // GetAvailRect
michael@0: 
michael@0: static double
michael@0: GetDPIScale()
michael@0: {
michael@0:   double dpiScale= nsIWidget::DefaultScaleOverride();
michael@0:   if (dpiScale <= 0.0) {
michael@0:     dpiScale = gfxWindowsPlatform::GetPlatform()->GetDPIScale(); 
michael@0:   }
michael@0:   return dpiScale;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsScreenWin::GetRectDisplayPix(int32_t *outLeft,  int32_t *outTop,
michael@0:                                int32_t *outWidth, int32_t *outHeight)
michael@0: {
michael@0:   int32_t left, top, width, height;
michael@0:   nsresult rv = GetRect(&left, &top, &width, &height);
michael@0:   if (NS_FAILED(rv)) {
michael@0:     return rv;
michael@0:   }
michael@0:   double scaleFactor = 1.0 / GetDPIScale();
michael@0:   *outLeft = NSToIntRound(left * scaleFactor);
michael@0:   *outTop = NSToIntRound(top * scaleFactor);
michael@0:   *outWidth = NSToIntRound(width * scaleFactor);
michael@0:   *outHeight = NSToIntRound(height * scaleFactor);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsScreenWin::GetAvailRectDisplayPix(int32_t *outLeft,  int32_t *outTop,
michael@0:                                     int32_t *outWidth, int32_t *outHeight)
michael@0: {
michael@0:   int32_t left, top, width, height;
michael@0:   nsresult rv = GetAvailRect(&left, &top, &width, &height);
michael@0:   if (NS_FAILED(rv)) {
michael@0:     return rv;
michael@0:   }
michael@0:   double scaleFactor = 1.0 / GetDPIScale();
michael@0:   *outLeft = NSToIntRound(left * scaleFactor);
michael@0:   *outTop = NSToIntRound(top * scaleFactor);
michael@0:   *outWidth = NSToIntRound(width * scaleFactor);
michael@0:   *outHeight = NSToIntRound(height * scaleFactor);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: 
michael@0: NS_IMETHODIMP 
michael@0: nsScreenWin :: GetPixelDepth(int32_t *aPixelDepth)
michael@0: {
michael@0:   //XXX not sure how to get this info for multiple monitors, this might be ok...
michael@0:   HDC hDCScreen = ::GetDC(nullptr);
michael@0:   NS_ASSERTION(hDCScreen,"GetDC Failure");
michael@0: 
michael@0:   int32_t depth = ::GetDeviceCaps(hDCScreen, BITSPIXEL);
michael@0:   if (depth == 32) {
michael@0:     // If a device uses 32 bits per pixel, it's still only using 8 bits
michael@0:     // per color component, which is what our callers want to know.
michael@0:     // (Some devices report 32 and some devices report 24.)
michael@0:     depth = 24;
michael@0:   }
michael@0:   *aPixelDepth = depth;
michael@0: 
michael@0:   ::ReleaseDC(nullptr, hDCScreen);
michael@0:   return NS_OK;
michael@0: 
michael@0: } // GetPixelDepth
michael@0: 
michael@0: 
michael@0: NS_IMETHODIMP 
michael@0: nsScreenWin :: GetColorDepth(int32_t *aColorDepth)
michael@0: {
michael@0:   return GetPixelDepth(aColorDepth);
michael@0: 
michael@0: } // GetColorDepth
michael@0: 
michael@0: