/// <summary>
/// Adds all present intervals that are compatible with the device and app
/// to the given device combo
/// </summary>
private static void BuildPresentIntervalList(EnumDeviceInformation deviceInfo, EnumDeviceSettingsCombo deviceCombo)
{
for (int i = 0; i < presentIntervalList.Count; i++)
{
PresentInterval pi = (PresentInterval)presentIntervalList[i];
if (deviceCombo.IsWindowed)
{
if ((pi == PresentInterval.Two) ||
(pi == PresentInterval.Three) ||
(pi == PresentInterval.Four))
{
// These intervals are never supported in windowed mode
continue;
}
}
// Not that PresentInterval.Default is zero so you can't do a bitwise
// check for it, it's always available
if ((pi == PresentInterval.Default) ||
((deviceInfo.Caps.PresentationIntervals & pi) != 0))
{
deviceCombo.presentIntervalList.Add(pi);
}
}
}
/// <summary>
/// Enumerates D3D devices for a particular adapter.
/// </summary>
private static void EnumerateDevices(EnumAdapterInformation adapterInfo, ArrayList adapterFormatList)
{
// Ignore any exceptions while looking for these device types
DirectXException.IgnoreExceptions();
// Enumerate each Direct3D device type
for (uint i = 0; i < deviceTypeArray.Length; i++)
{
// Create a new device information object
EnumDeviceInformation deviceInfo = new EnumDeviceInformation();
// Store the type
deviceInfo.DeviceType = deviceTypeArray[i];
// Try to get the capabilities
deviceInfo.Caps = Manager.GetDeviceCaps((int)adapterInfo.AdapterOrdinal, deviceInfo.DeviceType);
// Get information about each device combination on this device
EnumerateDeviceCombos(adapterInfo, deviceInfo, adapterFormatList);
// Do we have any device combinations?
if (deviceInfo.deviceSettingsList.Count > 0)
{
// Yes, add it
adapterInfo.deviceInfoList.Add(deviceInfo);
}
}
// Turn exception handling back on
DirectXException.EnableExceptions();
}
/// <summary>
/// Returns a specific device combination
/// </summary>
public static EnumDeviceSettingsCombo GetDeviceSettingsCombo(uint ordinal, DeviceType deviceType,
Format adapterFormat, Format backBufferFormat, bool isWindowed)
{
EnumDeviceInformation info = GetDeviceInfo(ordinal, deviceType);
if (info != null)
{
foreach (EnumDeviceSettingsCombo edsc in info.deviceSettingsList)
{
// Is this the right settings combo?
if ((edsc.AdapterFormat == adapterFormat) &&
(edsc.BackBufferFormat == backBufferFormat) &&
(edsc.IsWindowed == isWindowed))
{
return(edsc);
}
}
}
// Never found it
return(null);
}
/// <summary>
/// Enumerates device combinations for a particular device.
/// </summary>
private static void EnumerateDeviceCombos(EnumAdapterInformation adapterInfo, EnumDeviceInformation deviceInfo,
ArrayList adapterFormatList)
{
// Find out which adapter formats are supported by this device
foreach (Format adapterFormat in adapterFormatList)
{
for (int i = 0; i < backbufferFormatsArray.Length; i++)
{
// Go through each windowed mode
for (int windowedIndex = 0; windowedIndex < 2; windowedIndex++)
{
bool isWindowedIndex = (windowedIndex == 1);
if ((!isWindowedIndex) && (adapterInfo.displayModeList.Count == 0))
{
continue; // Nothing here
}
if (!Manager.CheckDeviceType((int)adapterInfo.AdapterOrdinal, deviceInfo.DeviceType,
adapterFormat, backbufferFormatsArray[i], isWindowedIndex))
{
continue; // Unsupported
}
// Do we require post pixel shader blending?
if (isPostPixelShaderBlendingRequired)
{
// If the backbuffer format doesn't support Usage.QueryPostPixelShaderBlending
// then alpha test, pixel fog, render-target blending, color write enable, and dithering
// are not supported.
if (!Manager.CheckDeviceFormat((int)adapterInfo.AdapterOrdinal, deviceInfo.DeviceType,
adapterFormat, Usage.QueryPostPixelShaderBlending,
ResourceType.Textures, backbufferFormatsArray[i]))
{
continue; // Unsupported
}
}
// If an application callback function has been provided, make sure this device
// is acceptable to the app.
if (deviceCreationInterface != null)
{
if (!deviceCreationInterface.IsDeviceAcceptable(deviceInfo.Caps,
adapterFormat, backbufferFormatsArray[i], isWindowedIndex))
{
continue; // Application doesn't like this device
}
}
// At this point, we have an adapter/device/adapterformat/backbufferformat/iswindowed
// DeviceCombo that is supported by the system and acceptable to the app. We still
// need to find one or more suitable depth/stencil buffer format,
// multisample type, and present interval.
EnumDeviceSettingsCombo deviceCombo = new EnumDeviceSettingsCombo();
// Store the information
deviceCombo.AdapterOrdinal = adapterInfo.AdapterOrdinal;
deviceCombo.DeviceType = deviceInfo.DeviceType;
deviceCombo.AdapterFormat = adapterFormat;
deviceCombo.BackBufferFormat = backbufferFormatsArray[i];
deviceCombo.IsWindowed = isWindowedIndex;
// Build the depth stencil format and multisample type list
BuildDepthStencilFormatList(deviceCombo);
BuildMultiSampleTypeList(deviceCombo);
if (deviceCombo.multiSampleTypeList.Count == 0)
{
// Nothing to do
continue;
}
// Build the conflict and present lists
BuildConflictList(deviceCombo);
BuildPresentIntervalList(deviceInfo, deviceCombo);
deviceCombo.adapterInformation = adapterInfo;
deviceCombo.deviceInformation = deviceInfo;
// Add the combo to the list of devices
deviceInfo.deviceSettingsList.Add(deviceCombo);
}
}
}
}