1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/windows/nsScreenWin.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,167 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "nsScreenWin.h"
1.10 +#include "nsCoord.h"
1.11 +#include "gfxWindowsPlatform.h"
1.12 +#include "nsIWidget.h"
1.13 +
1.14 +
1.15 +nsScreenWin :: nsScreenWin ( HMONITOR inScreen )
1.16 + : mScreen(inScreen)
1.17 +{
1.18 +#ifdef DEBUG
1.19 + HDC hDCScreen = ::GetDC(nullptr);
1.20 + NS_ASSERTION(hDCScreen,"GetDC Failure");
1.21 + NS_ASSERTION ( ::GetDeviceCaps(hDCScreen, TECHNOLOGY) == DT_RASDISPLAY, "Not a display screen");
1.22 + ::ReleaseDC(nullptr,hDCScreen);
1.23 +#endif
1.24 +
1.25 + // nothing else to do. I guess we could cache a bunch of information
1.26 + // here, but we want to ask the device at runtime in case anything
1.27 + // has changed.
1.28 +}
1.29 +
1.30 +
1.31 +nsScreenWin :: ~nsScreenWin()
1.32 +{
1.33 + // nothing to see here.
1.34 +}
1.35 +
1.36 +
1.37 +NS_IMETHODIMP
1.38 +nsScreenWin :: GetRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *outHeight)
1.39 +{
1.40 + BOOL success = FALSE;
1.41 + if ( mScreen ) {
1.42 + MONITORINFO info;
1.43 + info.cbSize = sizeof(MONITORINFO);
1.44 + success = ::GetMonitorInfoW( mScreen, &info );
1.45 + if ( success ) {
1.46 + *outLeft = info.rcMonitor.left;
1.47 + *outTop = info.rcMonitor.top;
1.48 + *outWidth = info.rcMonitor.right - info.rcMonitor.left;
1.49 + *outHeight = info.rcMonitor.bottom - info.rcMonitor.top;
1.50 + }
1.51 + }
1.52 + if (!success) {
1.53 + HDC hDCScreen = ::GetDC(nullptr);
1.54 + NS_ASSERTION(hDCScreen,"GetDC Failure");
1.55 +
1.56 + *outTop = *outLeft = 0;
1.57 + *outWidth = ::GetDeviceCaps(hDCScreen, HORZRES);
1.58 + *outHeight = ::GetDeviceCaps(hDCScreen, VERTRES);
1.59 +
1.60 + ::ReleaseDC(nullptr, hDCScreen);
1.61 + }
1.62 + return NS_OK;
1.63 +
1.64 +} // GetRect
1.65 +
1.66 +
1.67 +NS_IMETHODIMP
1.68 +nsScreenWin :: GetAvailRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *outHeight)
1.69 +{
1.70 + BOOL success = FALSE;
1.71 +
1.72 + if ( mScreen ) {
1.73 + MONITORINFO info;
1.74 + info.cbSize = sizeof(MONITORINFO);
1.75 + success = ::GetMonitorInfoW( mScreen, &info );
1.76 + if ( success ) {
1.77 + *outLeft = info.rcWork.left;
1.78 + *outTop = info.rcWork.top;
1.79 + *outWidth = info.rcWork.right - info.rcWork.left;
1.80 + *outHeight = info.rcWork.bottom - info.rcWork.top;
1.81 + }
1.82 + }
1.83 + if (!success) {
1.84 + RECT workArea;
1.85 + ::SystemParametersInfo(SPI_GETWORKAREA, 0, &workArea, 0);
1.86 + *outLeft = workArea.left;
1.87 + *outTop = workArea.top;
1.88 + *outWidth = workArea.right - workArea.left;
1.89 + *outHeight = workArea.bottom - workArea.top;
1.90 + }
1.91 +
1.92 + return NS_OK;
1.93 +
1.94 +} // GetAvailRect
1.95 +
1.96 +static double
1.97 +GetDPIScale()
1.98 +{
1.99 + double dpiScale= nsIWidget::DefaultScaleOverride();
1.100 + if (dpiScale <= 0.0) {
1.101 + dpiScale = gfxWindowsPlatform::GetPlatform()->GetDPIScale();
1.102 + }
1.103 + return dpiScale;
1.104 +}
1.105 +
1.106 +NS_IMETHODIMP
1.107 +nsScreenWin::GetRectDisplayPix(int32_t *outLeft, int32_t *outTop,
1.108 + int32_t *outWidth, int32_t *outHeight)
1.109 +{
1.110 + int32_t left, top, width, height;
1.111 + nsresult rv = GetRect(&left, &top, &width, &height);
1.112 + if (NS_FAILED(rv)) {
1.113 + return rv;
1.114 + }
1.115 + double scaleFactor = 1.0 / GetDPIScale();
1.116 + *outLeft = NSToIntRound(left * scaleFactor);
1.117 + *outTop = NSToIntRound(top * scaleFactor);
1.118 + *outWidth = NSToIntRound(width * scaleFactor);
1.119 + *outHeight = NSToIntRound(height * scaleFactor);
1.120 + return NS_OK;
1.121 +}
1.122 +
1.123 +NS_IMETHODIMP
1.124 +nsScreenWin::GetAvailRectDisplayPix(int32_t *outLeft, int32_t *outTop,
1.125 + int32_t *outWidth, int32_t *outHeight)
1.126 +{
1.127 + int32_t left, top, width, height;
1.128 + nsresult rv = GetAvailRect(&left, &top, &width, &height);
1.129 + if (NS_FAILED(rv)) {
1.130 + return rv;
1.131 + }
1.132 + double scaleFactor = 1.0 / GetDPIScale();
1.133 + *outLeft = NSToIntRound(left * scaleFactor);
1.134 + *outTop = NSToIntRound(top * scaleFactor);
1.135 + *outWidth = NSToIntRound(width * scaleFactor);
1.136 + *outHeight = NSToIntRound(height * scaleFactor);
1.137 + return NS_OK;
1.138 +}
1.139 +
1.140 +
1.141 +NS_IMETHODIMP
1.142 +nsScreenWin :: GetPixelDepth(int32_t *aPixelDepth)
1.143 +{
1.144 + //XXX not sure how to get this info for multiple monitors, this might be ok...
1.145 + HDC hDCScreen = ::GetDC(nullptr);
1.146 + NS_ASSERTION(hDCScreen,"GetDC Failure");
1.147 +
1.148 + int32_t depth = ::GetDeviceCaps(hDCScreen, BITSPIXEL);
1.149 + if (depth == 32) {
1.150 + // If a device uses 32 bits per pixel, it's still only using 8 bits
1.151 + // per color component, which is what our callers want to know.
1.152 + // (Some devices report 32 and some devices report 24.)
1.153 + depth = 24;
1.154 + }
1.155 + *aPixelDepth = depth;
1.156 +
1.157 + ::ReleaseDC(nullptr, hDCScreen);
1.158 + return NS_OK;
1.159 +
1.160 +} // GetPixelDepth
1.161 +
1.162 +
1.163 +NS_IMETHODIMP
1.164 +nsScreenWin :: GetColorDepth(int32_t *aColorDepth)
1.165 +{
1.166 + return GetPixelDepth(aColorDepth);
1.167 +
1.168 +} // GetColorDepth
1.169 +
1.170 +
