178 lines
4.6 KiB
C++
178 lines
4.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsScreenWin.h"
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#include "nsCoord.h"
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#include "gfxWindowsPlatform.h"
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#include "nsIWidget.h"
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static uint32_t sScreenId;
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nsScreenWin::nsScreenWin(HMONITOR inScreen)
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: mScreen(inScreen)
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, mId(++sScreenId)
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{
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#ifdef DEBUG
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HDC hDCScreen = ::GetDC(nullptr);
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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(nullptr,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::GetId(uint32_t *outId)
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{
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*outId = mId;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScreenWin::GetRect(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *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(nullptr);
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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(nullptr, 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(int32_t *outLeft, int32_t *outTop, int32_t *outWidth, int32_t *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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static double
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GetDPIScale()
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{
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double dpiScale= nsIWidget::DefaultScaleOverride();
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if (dpiScale <= 0.0) {
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dpiScale = gfxWindowsPlatform::GetPlatform()->GetDPIScale();
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}
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return dpiScale;
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}
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NS_IMETHODIMP
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nsScreenWin::GetRectDisplayPix(int32_t *outLeft, int32_t *outTop,
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int32_t *outWidth, int32_t *outHeight)
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{
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int32_t left, top, width, height;
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nsresult rv = GetRect(&left, &top, &width, &height);
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if (NS_FAILED(rv)) {
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return rv;
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}
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double scaleFactor = 1.0 / GetDPIScale();
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*outLeft = NSToIntRound(left * scaleFactor);
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*outTop = NSToIntRound(top * scaleFactor);
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*outWidth = NSToIntRound(width * scaleFactor);
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*outHeight = NSToIntRound(height * scaleFactor);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScreenWin::GetAvailRectDisplayPix(int32_t *outLeft, int32_t *outTop,
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int32_t *outWidth, int32_t *outHeight)
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{
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int32_t left, top, width, height;
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nsresult rv = GetAvailRect(&left, &top, &width, &height);
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if (NS_FAILED(rv)) {
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return rv;
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}
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double scaleFactor = 1.0 / GetDPIScale();
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*outLeft = NSToIntRound(left * scaleFactor);
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*outTop = NSToIntRound(top * scaleFactor);
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*outWidth = NSToIntRound(width * scaleFactor);
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*outHeight = NSToIntRound(height * scaleFactor);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsScreenWin :: GetPixelDepth(int32_t *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(nullptr);
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NS_ASSERTION(hDCScreen,"GetDC Failure");
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int32_t 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(nullptr, 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(int32_t *aColorDepth)
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{
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return GetPixelDepth(aColorDepth);
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} // GetColorDepth
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