Question

我正在使用 ScreenCapture sample SharpDX 库来截取游戏的截图全屏（因为这里常见的GDI +捕获技术不起作用，即使是Windos默认的“打印”键也无法对游戏进行适当的截图）。

我在我的应用程序中使用的代码几乎与上面链接的官方示例（翻译为VB.NET）相同，所以我认为没有必要在此处发布相同的代码块。

我遇到的问题是我想将鼠标光标包含在捕获的图像中。

也许 SharpDX 有一些方法或属性/参数以友好的方式包含鼠标光标？如果没有，那么考虑到游戏的鼠标光标是个性化的，如何能够实现这一点（不是默认的白色Windows箭头）？。

Answer 1

您可以使用WinAPI的GetCursorInfo()函数来获取当前游标的句柄。然后调用Icon.FromHandle()并将光标句柄作为参数传递，您将光标作为可绘制的图标。

由于不同的游标可能有不同的热点，因此您也必须考虑到这一点。为此，您可以使用WinAPI的GetIconInfo()函数来获取热点的X和Y坐标，然后您只需要用热点的位置减去光标的位置。

绘制光标的方法：

Public Shared Sub DrawCursor(ByVal Graphics As Graphics)
    Dim CursorInfo As New NativeMethods.CURSORINFO With {.cbSize = Marshal.SizeOf(GetType(NativeMethods.CURSORINFO))}

    'Get the cursor info.
    If NativeMethods.GetCursorInfo(CursorInfo) = True Then
        Using CursorIcon As System.Drawing.Icon = System.Drawing.Icon.FromHandle(CursorInfo.hCursor) 'Get the cursor icon.
            Dim IconInfo As New NativeMethods.ICONINFO

            Try
                Dim ModifierPoint As New Point(0, 0) 'Declare the modifier point (the cursor's hotspot).

                'Get the info for the cursor icon.
                If NativeMethods.GetIconInfo(CursorInfo.hCursor, IconInfo) = True Then
                    If IconInfo.fIcon = False Then 'If the cursor is an icon the hotspot will always be (0, 0).
                        ModifierPoint = New Point(IconInfo.xHotspot, IconInfo.yHotspot) 'Set the hotspot modifier.
                    End If

                End If


                'Normalize the coordinates according to the hotspot.
                Dim FinalPoint As New Point(CursorInfo.ptScreenPos.x - ModifierPoint.X, CursorInfo.ptScreenPos.y - ModifierPoint.Y)

                'Draw the cursor.
                Graphics.DrawIcon(CursorIcon, New Rectangle(FinalPoint, CursorIcon.Size))

            Finally
                'Some cleaning up...
                If IconInfo.hbmMask <> IntPtr.Zero Then
                    NativeMethods.DeleteObject(IconInfo.hbmMask)
                    IconInfo.hbmMask = IntPtr.Zero
                End If

                If IconInfo.hbmColor <> IntPtr.Zero Then
                    NativeMethods.DeleteObject(IconInfo.hbmColor)
                    IconInfo.hbmColor = IntPtr.Zero
                End If

            End Try
        End Using
    End If
End Sub

<强> NativeMethods.vb：

Imports System.Runtime.InteropServices

Public NotInheritable Class NativeMethods
    <StructLayout(LayoutKind.Sequential)> _
    Public Structure POINT
        Public x As Integer
        Public y As Integer
    End Structure

    <StructLayout(LayoutKind.Sequential)> _
    Public Structure CURSORINFO
        Public cbSize As Integer
        Public flags As Integer
        Public hCursor As IntPtr
        Public ptScreenPos As POINT
    End Structure

    <DllImport("user32.dll")> _
    Public Shared Function GetCursorInfo(ByRef pci As CURSORINFO) As Boolean
    End Function

    <StructLayout(LayoutKind.Sequential)> _
    Public Structure ICONINFO
        Public fIcon As Boolean
        Public xHotspot As Integer
        Public yHotspot As Integer
        Public hbmMask As IntPtr
        Public hbmColor As IntPtr
    End Structure

    <DllImport("user32.dll")> _
    Public Shared Function GetIconInfo(ByVal hIcon As IntPtr, ByRef piconinfo As ICONINFO) As Boolean
    End Function

    <DllImport("gdi32.dll")> _
    Public Shared Function DeleteObject(ByVal hObject As IntPtr) As <MarshalAs(UnmanagedType.Bool)> Boolean
    End Function
End Class

如果你拍摄得到的截图，你可以将光标画到它上面：

Using g As Graphics = Graphics.FromImage(yourImage)
    DrawCursor(g)
End Using

使用SharpDX在捕获屏幕中包含鼠标光标

1 个答案: