public static extern int GetGlyphOutline(IntPtr hdc, uint uChar, uint fuFormat, out GLYPHMETRICS lpgm, uint cbBuffer, IntPtr lpBuffer, ref MAT2 lpmat2);
/// <summary>
/// ��ȡ����������б�
/// </summary>
/// <param name="hdc">����</param>
/// <param name="uChar">�ַ�</param>
/// <returns></returns>
private static DOutline GetOutline(IntPtr hdc, uint uChar)
{
// ת�þ���
MAT2 mat2 = new MAT2();
mat2.eM11.value = 1;
mat2.eM22.value = 1;
GLYPHMETRICS lpGlyph = new GLYPHMETRICS();
//��ȡ��������С
int bufferSize = GdiNativeMethods.GetGlyphOutline(hdc, uChar, GGO_NATIVE, out lpGlyph, 0, IntPtr.Zero, ref mat2);
if (bufferSize > 0)
{
//��ȡ�ɹ������й��ڴ�
IntPtr buffer = Marshal.AllocHGlobal(bufferSize);
try
{
int ret = GdiNativeMethods.GetGlyphOutline(hdc, uChar, GGO_NATIVE, out lpGlyph, (uint)bufferSize, buffer, ref mat2);
if (ret > 0)
{
//��������
DOutline outline = new DOutline(lpGlyph.gmBlackBoxX, lpGlyph.gmBlackBoxY);
//�ӻ�����������������
FillPolygons(outline, buffer, bufferSize);
return outline;
}
else
{
throw new Exception("��ȡ��������ʧ�ܣ�");
}
}
finally
{
//�ͷ��й��ڴ�
Marshal.FreeHGlobal(buffer);
}
}
else
{
throw new Exception("δ�ܻ�ȡ��������");
}
}