diff options
Diffstat (limited to 'widget/windows/nsScreenWin.cpp')
| -rw-r--r-- | widget/windows/nsScreenWin.cpp | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/widget/windows/nsScreenWin.cpp b/widget/windows/nsScreenWin.cpp new file mode 100644 index 000000000..beacbf05f --- /dev/null +++ b/widget/windows/nsScreenWin.cpp @@ -0,0 +1,199 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "nsScreenWin.h" +#include "nsCoord.h" +#include "nsIWidget.h" +#include "WinUtils.h" + +using namespace mozilla; + +static uint32_t sScreenId; + +nsScreenWin::nsScreenWin(HMONITOR inScreen) + : mScreen(inScreen) + , mId(++sScreenId) +{ +#ifdef DEBUG + HDC hDCScreen = ::GetDC(nullptr); + NS_ASSERTION(hDCScreen,"GetDC Failure"); + NS_ASSERTION(::GetDeviceCaps(hDCScreen, TECHNOLOGY) == DT_RASDISPLAY, "Not a display screen"); + ::ReleaseDC(nullptr,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::GetId(uint32_t *outId) +{ + *outId = mId; + return NS_OK; +} + + +NS_IMETHODIMP +nsScreenWin::GetRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *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(nullptr); + NS_ASSERTION(hDCScreen,"GetDC Failure"); + + *outTop = *outLeft = 0; + *outWidth = ::GetDeviceCaps(hDCScreen, HORZRES); + *outHeight = ::GetDeviceCaps(hDCScreen, VERTRES); + + ::ReleaseDC(nullptr, hDCScreen); + } + return NS_OK; + +} // GetRect + + +NS_IMETHODIMP +nsScreenWin::GetAvailRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *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::GetRectDisplayPix(int32_t *outLeft, int32_t *outTop, + int32_t *outWidth, int32_t *outHeight) +{ + if (widget::WinUtils::IsPerMonitorDPIAware()) { + // on per-monitor-dpi config, display pixels are device pixels + return GetRect(outLeft, outTop, outWidth, outHeight); + } + int32_t left, top, width, height; + nsresult rv = GetRect(&left, &top, &width, &height); + if (NS_FAILED(rv)) { + return rv; + } + double scaleFactor = 1.0 / widget::WinUtils::LogToPhysFactor(mScreen); + *outLeft = NSToIntRound(left * scaleFactor); + *outTop = NSToIntRound(top * scaleFactor); + *outWidth = NSToIntRound(width * scaleFactor); + *outHeight = NSToIntRound(height * scaleFactor); + return NS_OK; +} + +NS_IMETHODIMP +nsScreenWin::GetAvailRectDisplayPix(int32_t *outLeft, int32_t *outTop, + int32_t *outWidth, int32_t *outHeight) +{ + if (widget::WinUtils::IsPerMonitorDPIAware()) { + // on per-monitor-dpi config, display pixels are device pixels + return GetAvailRect(outLeft, outTop, outWidth, outHeight); + } + int32_t left, top, width, height; + nsresult rv = GetAvailRect(&left, &top, &width, &height); + if (NS_FAILED(rv)) { + return rv; + } + double scaleFactor = 1.0 / widget::WinUtils::LogToPhysFactor(mScreen); + *outLeft = NSToIntRound(left * scaleFactor); + *outTop = NSToIntRound(top * scaleFactor); + *outWidth = NSToIntRound(width * scaleFactor); + *outHeight = NSToIntRound(height * scaleFactor); + return NS_OK; +} + + +NS_IMETHODIMP +nsScreenWin :: GetPixelDepth(int32_t *aPixelDepth) +{ + //XXX not sure how to get this info for multiple monitors, this might be ok... + HDC hDCScreen = ::GetDC(nullptr); + NS_ASSERTION(hDCScreen,"GetDC Failure"); + + int32_t 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(nullptr, hDCScreen); + return NS_OK; + +} // GetPixelDepth + + +NS_IMETHODIMP +nsScreenWin::GetColorDepth(int32_t *aColorDepth) +{ + return GetPixelDepth(aColorDepth); + +} // GetColorDepth + + +NS_IMETHODIMP +nsScreenWin::GetContentsScaleFactor(double *aContentsScaleFactor) +{ + if (widget::WinUtils::IsPerMonitorDPIAware()) { + *aContentsScaleFactor = 1.0; + } else { + *aContentsScaleFactor = widget::WinUtils::LogToPhysFactor(mScreen); + } + return NS_OK; +} + +NS_IMETHODIMP +nsScreenWin::GetDefaultCSSScaleFactor(double* aScaleFactor) +{ + double scale = nsIWidget::DefaultScaleOverride(); + if (scale > 0.0) { + *aScaleFactor = scale; + } else { + *aScaleFactor = widget::WinUtils::LogToPhysFactor(mScreen); + } + return NS_OK; +} |