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From Sukender and Robert Osfield, introduced GraphicsContext::ScreenSettings & WindowingSystemInterface::enumerateScreenSettings.

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This commit is contained in:
Robert Osfield
2008-12-16 15:08:04 +00:00
parent aad0a2a2ba
commit 4511281f04
5 changed files with 297 additions and 100 deletions
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108
src/osgViewer/GraphicsWindowWin32.cpp
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@@ -237,17 +237,17 @@ class Win32WindowingSystem : public osg::GraphicsContext::WindowingSystemInterfa
// Return the resolution of specified screen
// (0,0) is returned if screen is unknown
virtual void getScreenResolution( const osg::GraphicsContext::ScreenIdentifier& si, unsigned int& width, unsigned int& height );
virtual void getScreenSettings( const osg::GraphicsContext::ScreenIdentifier& si, osg::GraphicsContext::ScreenSettings & resolution );
// Return the bits per pixel of specified screen
// (0) is returned if screen is unknown
virtual void getScreenColorDepth( const osg::GraphicsContext::ScreenIdentifier& si, unsigned int& dmBitsPerPel );
// Set the resolution for given screen
virtual bool setScreenResolution( const osg::GraphicsContext::ScreenIdentifier& si, unsigned int width, unsigned int height );
virtual bool setScreenSettings( const osg::GraphicsContext::ScreenIdentifier& si, const osg::GraphicsContext::ScreenSettings & resolution );
// Set the refresh rate for given screen
virtual bool setScreenRefreshRate( const osg::GraphicsContext::ScreenIdentifier& si, double refreshRate );
// Enumerates available resolutions
virtual void enumerateScreenSettings(const osg::GraphicsContext::ScreenIdentifier& screenIdentifier, osg::GraphicsContext::ScreenSettingsList & resolution);
// Return the screen position and width/height.
// all zeros returned if screen is unknown
@@ -800,21 +800,40 @@ bool Win32WindowingSystem::getScreenInformation( const osg::GraphicsContext::Scr
return true;
}
void Win32WindowingSystem::getScreenResolution( const osg::GraphicsContext::ScreenIdentifier& si, unsigned int& width, unsigned int& height )
void Win32WindowingSystem::getScreenSettings( const osg::GraphicsContext::ScreenIdentifier& si, osg::GraphicsContext::ScreenSettings & resolution )
{
DISPLAY_DEVICE displayDevice;
DEVMODE deviceMode;
if (getScreenInformation(si, displayDevice, deviceMode))
{
width = deviceMode.dmPelsWidth;
height = deviceMode.dmPelsHeight;
if (!getScreenInformation(si, displayDevice, deviceMode))
deviceMode.dmFields = 0; // Set the fields to 0 so that it says 'nothing'.
// Get resolution
if ((deviceMode.dmFields & (DM_PELSWIDTH | DM_PELSHEIGHT)) != 0) {
resolution.width = deviceMode.dmPelsWidth;
resolution.height = deviceMode.dmPelsHeight;
} else {
resolution.width = 0;
resolution.height = 0;
}
// Get refersh rate
if ((deviceMode.dmFields & DM_DISPLAYFREQUENCY) != 0) {
resolution.refreshRate = deviceMode.dmDisplayFrequency;
if (resolution.refreshRate == 0 || resolution.refreshRate == 1) {
// Windows specific: 0 and 1 represent the hhardware's default refresh rate.
// If someone knows how to get this refresh rate (in Hz)...
osg::notify(osg::NOTICE) << "Win32WindowingSystem::getScreenSettings() is not fully implemented (cannot retreive the hardware's default refresh rate)."<<std::endl;
resolution.refreshRate = 0;
}
} else
resolution.refreshRate = 0;
// Get bits per pixel for color buffer
if ((deviceMode.dmFields & DM_BITSPERPEL) != 0)
resolution.colorDepth = deviceMode.dmBitsPerPel;
else
{
width = 0;
height = 0;
}
resolution.colorDepth = 0;
}
void Win32WindowingSystem::getScreenColorDepth( const osg::GraphicsContext::ScreenIdentifier& si, unsigned int& dmBitsPerPel )
@@ -859,36 +878,65 @@ bool Win32WindowingSystem::changeScreenSettings( const osg::GraphicsContext::Scr
return false;
}
bool Win32WindowingSystem::setScreenResolution( const osg::GraphicsContext::ScreenIdentifier& si, unsigned int width, unsigned int height )
bool Win32WindowingSystem::setScreenSettings( const osg::GraphicsContext::ScreenIdentifier& si, const osg::GraphicsContext::ScreenSettings & resolution )
{
DISPLAY_DEVICE displayDevice;
DEVMODE deviceMode;
if (!getScreenInformation(si, displayDevice, deviceMode)) return false;
deviceMode.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT;
deviceMode.dmPelsWidth = width;
deviceMode.dmPelsHeight = height;
deviceMode.dmFields = 0;
// Set resolution
if (resolution.width>0 && resolution.height>0) {
deviceMode.dmFields |= DM_PELSWIDTH | DM_PELSHEIGHT;
deviceMode.dmPelsWidth = static_cast<DWORD>(resolution.width);
deviceMode.dmPelsHeight = static_cast<DWORD>(resolution.height);
}
// Set refersh rate
if (resolution.refreshRate>0) {
deviceMode.dmFields |= DM_DISPLAYFREQUENCY;
deviceMode.dmDisplayFrequency = static_cast<DWORD>(resolution.refreshRate);
}
// Set bits per pixel for color buffer
if (resolution.colorDepth>0) {
deviceMode.dmFields |= DM_BITSPERPEL;
deviceMode.dmBitsPerPel = static_cast<DWORD>(resolution.colorDepth);
}
return changeScreenSettings(si, displayDevice, deviceMode);
}
bool Win32WindowingSystem::setScreenRefreshRate( const osg::GraphicsContext::ScreenIdentifier& si, double refreshRate )
{
DISPLAY_DEVICE displayDevice;
DEVMODE deviceMode;
void Win32WindowingSystem::enumerateScreenSettings(const osg::GraphicsContext::ScreenIdentifier& si, osg::GraphicsContext::ScreenSettingsList & resolutionList) {
resolutionList.clear();
unsigned int width, height;
getScreenResolution(si, width, height);
if (si.displayNum>0)
{
osg::notify(osg::WARN) << "Win32WindowingSystem::enumerateScreenSettings() - The screen identifier on the Win32 platform must always use display number 0. Value received was " << si.displayNum << std::endl;
return;
}
if (!getScreenInformation(si, displayDevice, deviceMode)) return false;
DisplayDevices displayDevices;
enumerateDisplayDevices(displayDevices);
deviceMode.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT | DM_DISPLAYFREQUENCY;
deviceMode.dmPelsWidth = width;
deviceMode.dmPelsHeight = height;
deviceMode.dmDisplayFrequency = (DWORD)refreshRate;
return changeScreenSettings(si, displayDevice, deviceMode);
if (si.screenNum>=static_cast<int>(displayDevices.size()))
{
osg::notify(osg::WARN) << "Win32WindowingSystem::enumerateScreenSettings() - Cannot get information for screen " << si.screenNum << " because it does not exist." << std::endl;
return;
}
DISPLAY_DEVICE displayDevice = displayDevices[si.screenNum];
// Do the enumeration
DEVMODE deviceMode;
static const unsigned int MAX_RESOLUTIONS = 4046; // Upper limit to avoid infinite (= very long) loop.
for (unsigned int i=0; i<MAX_RESOLUTIONS; ++i)
{
if (!::EnumDisplaySettings(displayDevice.DeviceName, i, &deviceMode))
break;
deviceMode.dmSize = sizeof(deviceMode);
deviceMode.dmDriverExtra = 0;
resolutionList.push_back(osg::GraphicsContext::ScreenSettings(deviceMode.dmPelsWidth, deviceMode.dmPelsHeight, deviceMode.dmDisplayFrequency, deviceMode.dmBitsPerPel));
}
}
void Win32WindowingSystem::getScreenPosition( const osg::GraphicsContext::ScreenIdentifier& si, int& originX, int& originY, unsigned int& width, unsigned int& height )