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//
// System.Drawing.Imaging.MetafileHeader.cs
//
// Author: Everaldo Canuto
// eMail: everaldo.canuto@bol.com.br
// Dennis Hayes (dennish@raytek.com)
//
// (C) 2002 Ximian, Inc. http://www.ximian.com
// Copyright (C) 2004, 2006 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Drawing.Drawing2D;
using System.Runtime.InteropServices;
namespace System.Drawing.Imaging {
[StructLayout(LayoutKind.Sequential, Pack=2)]
struct EnhMetafileHeader {
public int type;
public int size;
public Rectangle bounds;
public Rectangle frame;
public int signature;
public int version;
public int bytes;
public int records;
public short handles;
public short reserved;
public int description;
public int off_description;
public int palette_entires;
public Size device;
public Size millimeters;
}
// hack: keep public type as Sequential while making it possible to get the required union
[StructLayout(LayoutKind.Explicit)]
struct MonoMetafileHeader {
[FieldOffset (0)]
public MetafileType type;
[FieldOffset (4)]
public int size;
[FieldOffset (8)]
public int version;
[FieldOffset (12)]
public int emf_plus_flags;
[FieldOffset (16)]
public float dpi_x;
[FieldOffset (20)]
public float dpi_y;
[FieldOffset (24)]
public int x;
[FieldOffset (28)]
public int y;
[FieldOffset (32)]
public int width;
[FieldOffset (36)]
public int height;
[FieldOffset (40)]
public WmfMetaHeader wmf_header;
[FieldOffset (40)]
public EnhMetafileHeader emf_header;
[FieldOffset (128)]
public int emfplus_header_size;
[FieldOffset (132)]
public int logical_dpi_x;
[FieldOffset (136)]
public int logical_dpi_y;
}
[MonoTODO ("Metafiles, both WMF and EMF formats, aren't supported.")]
[StructLayout(LayoutKind.Sequential)]
public sealed class MetafileHeader {
private MonoMetafileHeader header;
//constructor
internal MetafileHeader (IntPtr henhmetafile)
{
Marshal.PtrToStructure (henhmetafile, this);
}
// methods
[MonoTODO ("always returns false")]
public bool IsDisplay ()
{
return false;
}
public bool IsEmf ()
{
return (Type == MetafileType.Emf);
}
public bool IsEmfOrEmfPlus ()
{
return (Type >= MetafileType.Emf);
}
public bool IsEmfPlus ()
{
return (Type >= MetafileType.EmfPlusOnly);
}
public bool IsEmfPlusDual ()
{
return (Type == MetafileType.EmfPlusDual);
}
public bool IsEmfPlusOnly ()
{
return (Type == MetafileType.EmfPlusOnly);
}
public bool IsWmf ()
{
return (Type <= MetafileType.WmfPlaceable);
}
public bool IsWmfPlaceable ()
{
return (Type == MetafileType.WmfPlaceable);
}
// properties
public Rectangle Bounds {
get { return new Rectangle (header.x, header.y, header.width, header.height); }
}
public float DpiX {
get { return header.dpi_x; }
}
public float DpiY {
get { return header.dpi_y; }
}
public int EmfPlusHeaderSize {
get { return header.emfplus_header_size; }
}
public int LogicalDpiX {
get { return header.logical_dpi_x; }
}
public int LogicalDpiY {
get { return header.logical_dpi_y; }
}
public int MetafileSize {
get { return header.size; }
}
public MetafileType Type {
get { return header.type; }
}
public int Version {
get { return header.version; }
}
// note: this always returns a new instance (where we can change
// properties even if they don't seems to affect anything)
public MetaHeader WmfHeader {
get {
if (IsWmf ())
return new MetaHeader (header.wmf_header);
throw new ArgumentException ("WmfHeader only available on WMF files.");
}
}
}
}
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