如何创建从位图对象Cursor对象? [英] How do I create a Cursor object from a Bitmap object?
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问题描述
假设我有一个现有的 System.Drawing.Bitmap
的对象,如何创建一个 System.Windows.Forms.Cursor
具有相同的像素数据作为我的位图
对象的对象?
Assuming I have an existing System.Drawing.Bitmap
object, how do I create a System.Windows.Forms.Cursor
object with the same pixel data as my Bitmap
object?
推荐答案
这个答案是从的这个问题。它可以让你无论从位图对象创建游标并设置其热点。
This answer is taken from this question. It allows you to both create a Cursor from a Bitmap object and set its hotspot.
public struct IconInfo
{
public bool fIcon;
public int xHotspot;
public int yHotspot;
public IntPtr hbmMask;
public IntPtr hbmColor;
}
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool GetIconInfo(IntPtr hIcon, ref IconInfo pIconInfo);
[DllImport("user32.dll")]
public static extern IntPtr CreateIconIndirect(ref IconInfo icon);
/// <summary>
/// Create a cursor from a bitmap without resizing and with the specified
/// hot spot
/// </summary>
public static Cursor CreateCursorNoResize(Bitmap bmp, int xHotSpot, int yHotSpot)
{
IntPtr ptr = bmp.GetHicon();
IconInfo tmp = new IconInfo();
GetIconInfo(ptr, ref tmp);
tmp.xHotspot = xHotSpot;
tmp.yHotspot = yHotSpot;
tmp.fIcon = false;
ptr = CreateIconIndirect(ref tmp);
return new Cursor(ptr);
}
/// <summary>
/// Create a 32x32 cursor from a bitmap, with the hot spot in the middle
/// </summary>
public static Cursor CreateCursor(Bitmap bmp)
{
int xHotSpot = 16;
int yHotSpot = 16;
IntPtr ptr = ((Bitmap)ResizeImage(bmp, 32, 32)).GetHicon();
IconInfo tmp = new IconInfo();
GetIconInfo(ptr, ref tmp);
tmp.xHotspot = xHotSpot;
tmp.yHotspot = yHotSpot;
tmp.fIcon = false;
ptr = CreateIconIndirect(ref tmp);
return new Cursor(ptr);
}
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