public static FileHandle FromStream(Stream stream, int count = 0)
{
if (count <= 0)
{
count = (int)(stream.Length - stream.Position);
}
var start = stream.Position;
byte[] data = null;
var fileRead = new FileHandle(count, (ignore, position, buffer, size) =>
{
if (!stream.CanRead)
{
return(false);
}
stream.Position = start + position;
if (data == null || data.Length < size)
{
data = new byte[size];
}
if (stream.Read(data, 0, (int)size) != size)
{
return(false);
}
Marshal.Copy(data, 0, buffer, (int)size);
return(true);
});
GC.KeepAlive(fileRead);
return(fileRead);
}
internal static int FPDFImageObjLoadJpegFile(FpdfPageT pages, int nCount, FpdfPageobjectT image_object, FileHandle fileAccess)
{
unsafe
{
var array = new[] { pages.__Instance };
fixed(IntPtr *dataPtr = &array[0])
{
return(FPDFImageObjLoadJpegFileInternal(dataPtr, nCount, image_object.__Instance, fileAccess));
}
}
}
internal static extern unsafe int FPDFImageObjLoadJpegFileInternal(IntPtr *pages, int nCount, IntPtr image_object, FileHandle fileAccess);
