The Tor Browser / file comparison
comparison: widget/windows/nsScreenWin.cpp
widget/windows/nsScreenWin.cpp
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:212621bfbc5a |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "nsScreenWin.h" | |
| 7 #include "nsCoord.h" | |
| 8 #include "gfxWindowsPlatform.h" | |
| 9 #include "nsIWidget.h" | |
| 10 | |
| 11 | |
| 12 nsScreenWin :: nsScreenWin ( HMONITOR inScreen ) | |
| 13 : mScreen(inScreen) | |
| 14 { | |
| 15 #ifdef DEBUG | |
| 16 HDC hDCScreen = ::GetDC(nullptr); | |
| 17 NS_ASSERTION(hDCScreen,"GetDC Failure"); | |
| 18 NS_ASSERTION ( ::GetDeviceCaps(hDCScreen, TECHNOLOGY) == DT_RASDISPLAY, "Not a display screen"); | |
| 19 ::ReleaseDC(nullptr,hDCScreen); | |
| 20 #endif | |
| 21 | |
| 22 // nothing else to do. I guess we could cache a bunch of information | |
| 23 // here, but we want to ask the device at runtime in case anything | |
| 24 // has changed. | |
| 25 } | |
| 26 | |
| 27 | |
| 28 nsScreenWin :: ~nsScreenWin() | |
| 29 { | |
| 30 // nothing to see here. | |
| 31 } | |
| 32 | |
| 33 | |
| 34 NS_IMETHODIMP | |
| 35 nsScreenWin :: GetRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *outHeight) | |
| 36 { | |
| 37 BOOL success = FALSE; | |
| 38 if ( mScreen ) { | |
| 39 MONITORINFO info; | |
| 40 info.cbSize = sizeof(MONITORINFO); | |
| 41 success = ::GetMonitorInfoW( mScreen, &info ); | |
| 42 if ( success ) { | |
| 43 *outLeft = info.rcMonitor.left; | |
| 44 *outTop = info.rcMonitor.top; | |
| 45 *outWidth = info.rcMonitor.right - info.rcMonitor.left; | |
| 46 *outHeight = info.rcMonitor.bottom - info.rcMonitor.top; | |
| 47 } | |
| 48 } | |
| 49 if (!success) { | |
| 50 HDC hDCScreen = ::GetDC(nullptr); | |
| 51 NS_ASSERTION(hDCScreen,"GetDC Failure"); | |
| 52 | |
| 53 *outTop = *outLeft = 0; | |
| 54 *outWidth = ::GetDeviceCaps(hDCScreen, HORZRES); | |
| 55 *outHeight = ::GetDeviceCaps(hDCScreen, VERTRES); | |
| 56 | |
| 57 ::ReleaseDC(nullptr, hDCScreen); | |
| 58 } | |
| 59 return NS_OK; | |
| 60 | |
| 61 } // GetRect | |
| 62 | |
| 63 | |
| 64 NS_IMETHODIMP | |
| 65 nsScreenWin :: GetAvailRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *outHeight) | |
| 66 { | |
| 67 BOOL success = FALSE; | |
| 68 | |
| 69 if ( mScreen ) { | |
| 70 MONITORINFO info; | |
| 71 info.cbSize = sizeof(MONITORINFO); | |
| 72 success = ::GetMonitorInfoW( mScreen, &info ); | |
| 73 if ( success ) { | |
| 74 *outLeft = info.rcWork.left; | |
| 75 *outTop = info.rcWork.top; | |
| 76 *outWidth = info.rcWork.right - info.rcWork.left; | |
| 77 *outHeight = info.rcWork.bottom - info.rcWork.top; | |
| 78 } | |
| 79 } | |
| 80 if (!success) { | |
| 81 RECT workArea; | |
| 82 ::SystemParametersInfo(SPI_GETWORKAREA, 0, &workArea, 0); | |
| 83 *outLeft = workArea.left; | |
| 84 *outTop = workArea.top; | |
| 85 *outWidth = workArea.right - workArea.left; | |
| 86 *outHeight = workArea.bottom - workArea.top; | |
| 87 } | |
| 88 | |
| 89 return NS_OK; | |
| 90 | |
| 91 } // GetAvailRect | |
| 92 | |
| 93 static double | |
| 94 GetDPIScale() | |
| 95 { | |
| 96 double dpiScale= nsIWidget::DefaultScaleOverride(); | |
| 97 if (dpiScale <= 0.0) { | |
| 98 dpiScale = gfxWindowsPlatform::GetPlatform()->GetDPIScale(); | |
| 99 } | |
| 100 return dpiScale; | |
| 101 } | |
| 102 | |
| 103 NS_IMETHODIMP | |
| 104 nsScreenWin::GetRectDisplayPix(int32_t *outLeft, int32_t *outTop, | |
| 105 int32_t *outWidth, int32_t *outHeight) | |
| 106 { | |
| 107 int32_t left, top, width, height; | |
| 108 nsresult rv = GetRect(&left, &top, &width, &height); | |
| 109 if (NS_FAILED(rv)) { | |
| 110 return rv; | |
| 111 } | |
| 112 double scaleFactor = 1.0 / GetDPIScale(); | |
| 113 *outLeft = NSToIntRound(left * scaleFactor); | |
| 114 *outTop = NSToIntRound(top * scaleFactor); | |
| 115 *outWidth = NSToIntRound(width * scaleFactor); | |
| 116 *outHeight = NSToIntRound(height * scaleFactor); | |
| 117 return NS_OK; | |
| 118 } | |
| 119 | |
| 120 NS_IMETHODIMP | |
| 121 nsScreenWin::GetAvailRectDisplayPix(int32_t *outLeft, int32_t *outTop, | |
| 122 int32_t *outWidth, int32_t *outHeight) | |
| 123 { | |
| 124 int32_t left, top, width, height; | |
| 125 nsresult rv = GetAvailRect(&left, &top, &width, &height); | |
| 126 if (NS_FAILED(rv)) { | |
| 127 return rv; | |
| 128 } | |
| 129 double scaleFactor = 1.0 / GetDPIScale(); | |
| 130 *outLeft = NSToIntRound(left * scaleFactor); | |
| 131 *outTop = NSToIntRound(top * scaleFactor); | |
| 132 *outWidth = NSToIntRound(width * scaleFactor); | |
| 133 *outHeight = NSToIntRound(height * scaleFactor); | |
| 134 return NS_OK; | |
| 135 } | |
| 136 | |
| 137 | |
| 138 NS_IMETHODIMP | |
| 139 nsScreenWin :: GetPixelDepth(int32_t *aPixelDepth) | |
| 140 { | |
| 141 //XXX not sure how to get this info for multiple monitors, this might be ok... | |
| 142 HDC hDCScreen = ::GetDC(nullptr); | |
| 143 NS_ASSERTION(hDCScreen,"GetDC Failure"); | |
| 144 | |
| 145 int32_t depth = ::GetDeviceCaps(hDCScreen, BITSPIXEL); | |
| 146 if (depth == 32) { | |
| 147 // If a device uses 32 bits per pixel, it's still only using 8 bits | |
| 148 // per color component, which is what our callers want to know. | |
| 149 // (Some devices report 32 and some devices report 24.) | |
| 150 depth = 24; | |
| 151 } | |
| 152 *aPixelDepth = depth; | |
| 153 | |
| 154 ::ReleaseDC(nullptr, hDCScreen); | |
| 155 return NS_OK; | |
| 156 | |
| 157 } // GetPixelDepth | |
| 158 | |
| 159 | |
| 160 NS_IMETHODIMP | |
| 161 nsScreenWin :: GetColorDepth(int32_t *aColorDepth) | |
| 162 { | |
| 163 return GetPixelDepth(aColorDepth); | |
| 164 | |
| 165 } // GetColorDepth | |
| 166 | |
| 167 |
