我还没有找到一个体面的（任何真正的）pinvoke包装新win7 CCD api。 api可以从这里找到：http://msdn.microsoft.com/en-us/library/windows/hardware/hh406259(v=vs.85).aspx
我花了几个小时来转换结构/方法调用，以便我可以在C＃中使用它。
这是第一个“草案”：
using System;
using System.Runtime.InteropServices;
namespace CONVERTING_CCD
{
/// <summary>
/// This class takes care of wrapping "Connecting and Configuring Displays(CCD) Win32 API"
/// Author Erti-Chris Eelmaa || easter199 at hotmail dot com
/// </summary>
public class CCDWrapper
{
[StructLayout(LayoutKind.Sequential)]
public struct LUID
{
public uint LowPart;
public uint HighPart;
}
[Flags]
public enum DisplayConfigVideoOutputTechnology : uint
{
Other = 4294967295, // -1
Hd15 = 0,
Svideo = 1,
CompositeVideo = 2,
ComponentVideo = 3,
Dvi = 4,
Hdmi = 5,
Lvds = 6,
DJpn = 8,
Sdi = 9,
DisplayportExternal = 10,
DisplayportEmbedded = 11,
UdiExternal = 12,
UdiEmbedded = 13,
Sdtvdongle = 14,
Internal = 0x80000000,
ForceUint32 = 0xFFFFFFFF
}
#region SdcFlags enum
[Flags]
public enum SdcFlags : uint
{
Zero = 0,
TopologyInternal = 0x00000001,
TopologyClone = 0x00000002,
TopologyExtend = 0x00000004,
TopologyExternal = 0x00000008,
TopologySupplied = 0x00000010,
UseSuppliedDisplayConfig = 0x00000020,
Validate = 0x00000040,
Apply = 0x00000080,
NoOptimization = 0x00000100,
SaveToDatabase = 0x00000200,
AllowChanges = 0x00000400,
PathPersistIfRequired = 0x00000800,
ForceModeEnumeration = 0x00001000,
AllowPathOrderChanges = 0x00002000,
UseDatabaseCurrent = TopologyInternal | TopologyClone | TopologyExtend | TopologyExternal
}
[Flags]
public enum DisplayConfigFlags : uint
{
Zero = 0x0,
PathActive = 0x00000001
}
[Flags]
public enum DisplayConfigSourceStatus
{
Zero = 0x0,
InUse = 0x00000001
}
[Flags]
public enum DisplayConfigTargetStatus : uint
{
Zero = 0x0,
InUse = 0x00000001,
FORCIBLE = 0x00000002,
ForcedAvailabilityBoot = 0x00000004,
ForcedAvailabilityPath = 0x00000008,
ForcedAvailabilitySystem = 0x00000010,
}
[Flags]
public enum DisplayConfigRotation : uint
{
Zero = 0x0,
Identity = 1,
Rotate90 = 2,
Rotate180 = 3,
Rotate270 = 4,
ForceUint32 = 0xFFFFFFFF
}
[Flags]
public enum DisplayConfigPixelFormat : uint
{
Zero = 0x0,
Pixelformat8Bpp = 1,
Pixelformat16Bpp = 2,
Pixelformat24Bpp = 3,
Pixelformat32Bpp = 4,
PixelformatNongdi = 5,
PixelformatForceUint32 = 0xffffffff
}
[Flags]
public enum DisplayConfigScaling : uint
{
Zero = 0x0,
Identity = 1,
Centered = 2,
Stretched = 3,
Aspectratiocenteredmax = 4,
Custom = 5,
Preferred = 128,
ForceUint32 = 0xFFFFFFFF
}
[StructLayout(LayoutKind.Sequential)]
public struct DisplayConfigRational
{
public uint numerator;
public uint denominator;
}
[Flags]
public enum DisplayConfigScanLineOrdering : uint
{
Unspecified = 0,
Progressive = 1,
Interlaced = 2,
InterlacedUpperfieldfirst = Interlaced,
InterlacedLowerfieldfirst = 3,
ForceUint32 = 0xFFFFFFFF
}
[StructLayout(LayoutKind.Sequential)]
public struct DisplayConfigPathInfo
{
public DisplayConfigPathSourceInfo sourceInfo;
public DisplayConfigPathTargetInfo targetInfo;
public uint flags;
}
[Flags]
public enum DisplayConfigModeInfoType : uint
{
Zero = 0,
Source = 1,
Target = 2,
ForceUint32 = 0xFFFFFFFF
}
[StructLayout(LayoutKind.Explicit)]
public struct DisplayConfigModeInfo
{
[FieldOffset((0))]
public DisplayConfigModeInfoType infoType;
[FieldOffset(4)]
public uint id;
[FieldOffset(8)]
public LUID adapterId;
[FieldOffset(16)]
public DisplayConfigTargetMode targetMode;
[FieldOffset(16)]
public DisplayConfigSourceMode sourceMode;
}
[StructLayout(LayoutKind.Sequential)]
public struct DisplayConfig2DRegion
{
public uint cx;
public uint cy;
}
[Flags]
public enum D3DmdtVideoSignalStandard : uint
{
Uninitialized = 0,
VesaDmt = 1,
VesaGtf = 2,
VesaCvt = 3,
Ibm = 4,
Apple = 5,
NtscM = 6,
NtscJ = 7,
Ntsc443 = 8,
PalB = 9,
PalB1 = 10,
PalG = 11,
PalH = 12,
PalI = 13,
PalD = 14,
PalN = 15,
PalNc = 16,
SecamB = 17,
SecamD = 18,
SecamG = 19,
SecamH = 20,
SecamK = 21,
SecamK1 = 22,
SecamL = 23,
SecamL1 = 24,
Eia861 = 25,
Eia861A = 26,
Eia861B = 27,
PalK = 28,
PalK1 = 29,
PalL = 30,
PalM = 31,
Other = 255
}
[StructLayout(LayoutKind.Sequential)]
public struct DisplayConfigVideoSignalInfo
{
public long pixelRate;
public DisplayConfigRational hSyncFreq;
public DisplayConfigRational vSyncFreq;
public DisplayConfig2DRegion activeSize;
public DisplayConfig2DRegion totalSize;
public D3DmdtVideoSignalStandard videoStandard;
public DisplayConfigScanLineOrdering ScanLineOrdering;
}
[StructLayout(LayoutKind.Sequential)]
public struct DisplayConfigTargetMode
{
public DisplayConfigVideoSignalInfo targetVideoSignalInfo;
}
[StructLayout(LayoutKind.Sequential)]
public struct PointL
{
public int x;
public int y;
}
[StructLayout(LayoutKind.Sequential)]
public struct DisplayConfigSourceMode
{
public uint width;
public uint height;
public DisplayConfigPixelFormat pixelFormat;
public PointL position;
}
[StructLayout(LayoutKind.Sequential)]
public struct DisplayConfigPathSourceInfo
{
public LUID adapterId;
public uint id;
public uint modeInfoIdx;
public DisplayConfigSourceStatus statusFlags;
}
[StructLayout(LayoutKind.Sequential)]
public struct DisplayConfigPathTargetInfo
{
public LUID adapterId;
public uint id;
public uint modeInfoIdx;
public DisplayConfigVideoOutputTechnology outputTechnology;
public DisplayConfigRotation rotation;
public DisplayConfigScaling scaling;
public DisplayConfigRational refreshRate;
public DisplayConfigScanLineOrdering scanLineOrdering;
public bool targetAvailable;
public DisplayConfigTargetStatus statusFlags;
}
[Flags]
public enum QueryDisplayFlags : uint
{
Zero = 0x0,
AllPaths = 0x00000001,
OnlyActivePaths = 0x00000002,
DatabaseCurrent = 0x00000004
}
[Flags]
public enum DisplayConfigTopologyId : uint
{
Zero = 0x0,
Internal = 0x00000001,
Clone = 0x00000002,
Extend = 0x00000004,
External = 0x00000008,
ForceUint32 = 0xFFFFFFFF
}
#endregion
[DllImport("User32.dll")]
public static extern int SetDisplayConfig(uint numPathArrayElements, out DisplayConfigPathInfo pathArray,
uint numModeInfoArrayElements, out DisplayConfigModeInfo modeInfoArray,
SdcFlags flags);
[DllImport("User32.dll")]
public static extern int QueryDisplayConfig(QueryDisplayFlags flags, ref int numPathArrayElements,
ref DisplayConfigPathInfo[] pathInfoArray,
ref int modeInfoArrayElements,
ref DisplayConfigModeInfo[] modeInfoArray,
IntPtr z);
[DllImport("User32.dll")]
public static extern int GetDisplayConfigBufferSizes(QueryDisplayFlags flags, out int numPathArrayElements, out int numModeInfoArrayElements);
}
}
我差不多完成了，当它完成后，我会把它发送到pinvoke.net。现在有一个问题，即当我调用QueryDisplayConfig（）时，将抛出null-reference异常，这根本不告诉我任何事情。我花了几个小时重新检查一切，从前到后，从前到后。
以下是实际的代码用法：
static void Main(string[] args)
{
int numPathArrayElements;
int numModeInfoArrayElements;
// query active paths from the current computer.
if (CCDWrapper.GetDisplayConfigBufferSizes(CCDWrapper.QueryDisplayFlags.OnlyActivePaths, out numPathArrayElements,
out numModeInfoArrayElements) == 0)
{
// 0 is success.
var pathInfoArray = new CCDWrapper.DisplayConfigPathInfo[numPathArrayElements];
var modeInfoArray = new CCDWrapper.DisplayConfigModeInfo[numModeInfoArrayElements];
CCDWrapper.DisplayConfigTopologyId currentTopologyId; // don't use it right now.
var first = Marshal.SizeOf(new CCDWrapper.DisplayConfigPathInfo());
var second = Marshal.SizeOf(new CCDWrapper.DisplayConfigModeInfo());
var status = CCDWrapper.QueryDisplayConfig(CCDWrapper.QueryDisplayFlags.OnlyActivePaths,
ref numPathArrayElements, ref pathInfoArray, ref numModeInfoArrayElements,
ref modeInfoArray, IntPtr.Zero);
}
}
请注意，结构尺寸应该合适：
var first = Marshal.SizeOf(new CCDWrapper.DisplayConfigPathInfo());
var second = Marshal.SizeOf(new CCDWrapper.DisplayConfigModeInfo());
first =＆gt; 72， second =＆gt; 64，
当我从C ++中检查时：
int first = sizeof(DISPLAYCONFIG_PATH_INFO);
int second = sizeof(DISPLAYCONFIG_MODE_INFO);
它给了我相同的结果。
答案 0 :(得分：1)
您在SetDisplayConfig和QueryDisplayConfig声明中处理数组是错误的。尝试这些更改：
[DllImport("User32.dll")]
public static extern int SetDisplayConfig(
uint numPathArrayElements,
[In] DisplayConfigPathInfo[] pathArray,
uint numModeInfoArrayElements,
[In] DisplayConfigModeInfo[] modeInfoArray,
SdcFlags flags
);
[DllImport("User32.dll")]
public static extern int QueryDisplayConfig(
QueryDisplayFlags flags,
ref int numPathArrayElements,
[Out] DisplayConfigPathInfo[] pathInfoArray,
ref int modeInfoArrayElements,
[Out] DisplayConfigModeInfo[] modeInfoArray,
IntPtr z
);