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/* -*- 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;
}
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