public Metafile(Stream stream, IntPtr referenceHdc, RectangleF frameRect, MetafileFrameUnit frameUnit,
EmfType type, string description)
{
if (stream == null)
{
throw new NullReferenceException("stream");
}
Status status = Status.NotImplemented;
if (GDIPlus.RunningOnUnix())
{
// With libgdiplus we use a custom API for this, because there's no easy way
// to get the Stream down to libgdiplus. So, we wrap the stream with a set of delegates.
GDIPlus.GdiPlusStreamHelper sh = new GDIPlus.GdiPlusStreamHelper(stream, false);
status = GDIPlus.GdipRecordMetafileFromDelegate_linux(sh.GetHeaderDelegate, sh.GetBytesDelegate,
sh.PutBytesDelegate, sh.SeekDelegate, sh.CloseDelegate, sh.SizeDelegate, referenceHdc,
type, ref frameRect, frameUnit, description, out nativeObject);
}
else
{
status = GDIPlus.GdipRecordMetafileStream(new ComIStreamWrapper(stream), referenceHdc,
type, ref frameRect, frameUnit, description, out nativeObject);
}
GDIPlus.CheckStatus(status);
}
public static MetafileHeader GetMetafileHeader(Stream stream)
{
if (stream == null)
{
throw new NullReferenceException("stream");
}
IntPtr header = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(MetafileHeader)));
try {
Status status;
if (GDIPlus.RunningOnUnix())
{
// With libgdiplus we use a custom API for this, because there's no easy way
// to get the Stream down to libgdiplus. So, we wrap the stream with a set of delegates.
GDIPlus.GdiPlusStreamHelper sh = new GDIPlus.GdiPlusStreamHelper(stream, false);
status = GDIPlus.GdipGetMetafileHeaderFromDelegate_linux(sh.GetHeaderDelegate,
sh.GetBytesDelegate, sh.PutBytesDelegate, sh.SeekDelegate, sh.CloseDelegate,
sh.SizeDelegate, header);
}
else
{
status = GDIPlus.GdipGetMetafileHeaderFromStream(new ComIStreamWrapper(stream), header);
}
GDIPlus.CheckStatus(status);
return(new MetafileHeader(header));
}
finally {
Marshal.FreeHGlobal(header);
}
}
internal static IntPtr InitFromStream(Stream stream)
{
if (stream == null)
{
throw new ArgumentException("stream");
}
IntPtr imagePtr;
Status st;
// Seeking required
if (!stream.CanSeek)
{
byte[] buffer = new byte[256];
int index = 0;
int count;
do
{
if (buffer.Length < index + 256)
{
byte[] newBuffer = new byte[buffer.Length * 2];
Array.Copy(buffer, newBuffer, buffer.Length);
buffer = newBuffer;
}
count = stream.Read(buffer, index, 256);
index += count;
}while (count != 0);
stream = new MemoryStream(buffer, 0, index);
}
if (GDIPlus.RunningOnUnix())
{
// Unix, with libgdiplus
// We use a custom API for this, because there's no easy way
// to get the Stream down to libgdiplus. So, we wrap the stream
// with a set of delegates.
GDIPlus.GdiPlusStreamHelper sh = new GDIPlus.GdiPlusStreamHelper(stream, true);
st = GDIPlus.GdipLoadImageFromDelegate_linux(sh.GetHeaderDelegate, sh.GetBytesDelegate,
sh.PutBytesDelegate, sh.SeekDelegate, sh.CloseDelegate, sh.SizeDelegate, out imagePtr);
}
else
{
st = GDIPlus.GdipLoadImageFromStream(new ComIStreamWrapper(stream), out imagePtr);
}
return(st == Status.Ok ? imagePtr : IntPtr.Zero);
}
public Metafile (Stream stream)
{
if (stream == null)
throw new ArgumentException ("stream");
Status status;
if (GDIPlus.RunningOnUnix ()) {
// With libgdiplus we use a custom API for this, because there's no easy way
// to get the Stream down to libgdiplus. So, we wrap the stream with a set of delegates.
GDIPlus.GdiPlusStreamHelper sh = new GDIPlus.GdiPlusStreamHelper (stream, false);
status = GDIPlus.GdipCreateMetafileFromDelegate_linux (sh.GetHeaderDelegate, sh.GetBytesDelegate,
sh.PutBytesDelegate, sh.SeekDelegate, sh.CloseDelegate, sh.SizeDelegate, out nativeObject);
} else {
status = GDIPlus.GdipCreateMetafileFromStream (new ComIStreamWrapper (stream), out nativeObject);
}
GDIPlus.CheckStatus (status);
}
public void Save(Stream stream, ImageCodecInfo encoder, EncoderParameters encoderParams)
{
Status st;
IntPtr nativeEncoderParams;
Guid guid = encoder.Clsid;
if (encoderParams == null)
{
nativeEncoderParams = IntPtr.Zero;
}
else
{
nativeEncoderParams = encoderParams.ToNativePtr();
}
try
{
if (GDIPlus.RunningOnUnix())
{
GDIPlus.GdiPlusStreamHelper sh = new GDIPlus.GdiPlusStreamHelper(stream, false);
st = GDIPlus.GdipSaveImageToDelegate_linux(nativeObject, sh.GetBytesDelegate, sh.PutBytesDelegate,
sh.SeekDelegate, sh.CloseDelegate, sh.SizeDelegate, ref guid, nativeEncoderParams);
}
else
{
st = GDIPlus.GdipSaveImageToStream(new HandleRef(this, nativeObject),
new ComIStreamWrapper(stream), ref guid, new HandleRef(encoderParams, nativeEncoderParams));
}
}
finally
{
if (nativeEncoderParams != IntPtr.Zero)
{
Marshal.FreeHGlobal(nativeEncoderParams);
}
}
GDIPlus.CheckStatus(st);
}
public Metafile(Stream stream)
{
if (stream == null)
{
throw new ArgumentException("stream");
}
Status status;
if (GDIPlus.RunningOnUnix())
{
// With libgdiplus we use a custom API for this, because there's no easy way
// to get the Stream down to libgdiplus. So, we wrap the stream with a set of delegates.
GDIPlus.GdiPlusStreamHelper sh = new GDIPlus.GdiPlusStreamHelper(stream, false);
status = GDIPlus.GdipCreateMetafileFromDelegate_linux(sh.GetHeaderDelegate, sh.GetBytesDelegate,
sh.PutBytesDelegate, sh.SeekDelegate, sh.CloseDelegate, sh.SizeDelegate, out nativeObject);
}
else
{
status = GDIPlus.GdipCreateMetafileFromStream(new ComIStreamWrapper(stream), out nativeObject);
}
GDIPlus.CheckStatus(status);
}
public static MetafileHeader GetMetafileHeader (Stream stream)
{
if (stream == null)
throw new NullReferenceException ("stream");
IntPtr header = Marshal.AllocHGlobal (Marshal.SizeOf (typeof (MetafileHeader)));
try {
Status status;
if (GDIPlus.RunningOnUnix ()) {
// With libgdiplus we use a custom API for this, because there's no easy way
// to get the Stream down to libgdiplus. So, we wrap the stream with a set of delegates.
GDIPlus.GdiPlusStreamHelper sh = new GDIPlus.GdiPlusStreamHelper (stream, false);
status = GDIPlus.GdipGetMetafileHeaderFromDelegate_linux (sh.GetHeaderDelegate,
sh.GetBytesDelegate, sh.PutBytesDelegate, sh.SeekDelegate, sh.CloseDelegate,
sh.SizeDelegate, header);
} else {
status = GDIPlus.GdipGetMetafileHeaderFromStream (new ComIStreamWrapper (stream), header);
}
GDIPlus.CheckStatus (status);
return new MetafileHeader (header);
}
finally {
Marshal.FreeHGlobal (header);
}
}
public Metafile (Stream stream, IntPtr referenceHdc, RectangleF frameRect, MetafileFrameUnit frameUnit,
EmfType type, string description)
{
if (stream == null)
throw new NullReferenceException ("stream");
Status status = Status.NotImplemented;
if (GDIPlus.RunningOnUnix ()) {
// With libgdiplus we use a custom API for this, because there's no easy way
// to get the Stream down to libgdiplus. So, we wrap the stream with a set of delegates.
GDIPlus.GdiPlusStreamHelper sh = new GDIPlus.GdiPlusStreamHelper (stream, false);
status = GDIPlus.GdipRecordMetafileFromDelegate_linux (sh.GetHeaderDelegate, sh.GetBytesDelegate,
sh.PutBytesDelegate, sh.SeekDelegate, sh.CloseDelegate, sh.SizeDelegate, referenceHdc,
type, ref frameRect, frameUnit, description, out nativeObject);
} else {
status = GDIPlus.GdipRecordMetafileStream (new ComIStreamWrapper (stream), referenceHdc,
type, ref frameRect, frameUnit, description, out nativeObject);
}
GDIPlus.CheckStatus (status);
}
