public static extern uint GetCharacterPlacementW(IntPtr hdc, [MarshalAs(UnmanagedType.LPWStr)] string lpString, int nCount, int nMaxExtent, ref GCP_RESULTS lpResults, GCPFlags dwFlags);
public static void GetCharacterPlacement(DeviceContextSafeHandle hdc, string text, GCPFlags flags, out GcpResults gcpResults)
{
int len = text.Length;
gcpResults = new GcpResults
{
Order = new int[len],
Dx = new int[len],
CaretPos = new int[len],
Class = new byte[len],
Glyphs = new short[len],
};
GCHandle ordHnd = GCHandle.Alloc(gcpResults.Order, GCHandleType.Pinned);
GCHandle dxHnd = GCHandle.Alloc(gcpResults.Dx, GCHandleType.Pinned);
GCHandle carHnd = GCHandle.Alloc(gcpResults.CaretPos, GCHandleType.Pinned);
GCHandle clsHnd = GCHandle.Alloc(gcpResults.Class, GCHandleType.Pinned);
GCHandle glyHnd = GCHandle.Alloc(gcpResults.Glyphs, GCHandleType.Pinned);
try
{
GCP_RESULTS rs = new GCP_RESULTS
{
StructSize = Marshal.SizeOf(typeof(GCP_RESULTS)),
OutString = new String('\0', len + 2),
Order = ordHnd.AddrOfPinnedObject(),
Dx = dxHnd.AddrOfPinnedObject(),
CaretPos = carHnd.AddrOfPinnedObject(),
Class = clsHnd.AddrOfPinnedObject(),
Glyphs = glyHnd.AddrOfPinnedObject(),
GlyphCount = len,
MaxFit = 0
};
uint r = GetCharacterPlacement(hdc, text, len, 0, ref rs, (uint)flags);
if (r == 0 && Marshal.GetLastWin32Error() != 0)
{
throw new Win32Exception();
}
gcpResults.OutString = rs.OutString;
gcpResults.MaxFit = rs.MaxFit;
return;
}
finally
{
ordHnd.Free();
dxHnd.Free();
carHnd.Free();
clsHnd.Free();
glyHnd.Free();
}
}
