示例#1
0
        // Loading function
        protected override FIBITMAP LoadProc(ref FreeImageIO io, fi_handle handle, int page, int flags, IntPtr data)
        {
            // Check if the data has the correct format
            if (!ValidateProc(ref io, handle))
            {
                // Create a free-image message
                FreeImage.OutputMessageProc(format, "Invalid format.");
                // return 0 (operation failed)
                return FIBITMAP.Zero;
            }

            SerialDib sdib;
            int read = 0;
            System.IO.MemoryStream stream = new System.IO.MemoryStream();
            byte[] buffer = new byte[1024];

            do
            {
                // Use the helper function 'Read' to read from the source
                read = Read(io, handle, 1, 1024, ref buffer);

                // Store the data in a temporary buffer
                stream.Write(buffer, 0, read);
            }
            while (read != 0);

            // Set the memory stream back to the beginning.
            stream.Position = 0;

            // Unzip the stream
            GZipStream zipStream = new GZipStream(stream, CompressionMode.Decompress);

            // Create a serializer
            BinaryFormatter formatter = new BinaryFormatter();

            // Deserialize the stream
            sdib = (SerialDib)formatter.Deserialize(zipStream);

            // Unload the stream
            zipStream.Dispose();

            // Use 'ConvertFromRawBits and the deserialized struct to recreate the bitmap
            // In this case the marshaller is used to create the needed IntPtr to the data
            // array.
            FIBITMAP dib = FreeImage.ConvertFromRawBits(
                Marshal.UnsafeAddrOfPinnedArrayElement(sdib.data, 0),
                (int)sdib.width, (int)sdib.height, sdib.pitch, sdib.bpp,
                sdib.red_mask, sdib.green_mask, sdib.blue_mask,
                false);

            // Unload the temporary stream
            stream.Dispose();

            // Return the created bitmap
            return dib;
        }
示例#2
0
 // The function reads the first bytes of the file and compares it
 // with the predefined header.
 protected override bool ValidateProc(ref FreeImageIO io, fi_handle handle)
 {
     for (int i = 0; i < header.Length; i++)
         if (ReadByte(io, handle) != header[i])
             return false;
     return true;
 }
示例#3
0
 /// <summary>
 /// Writes a single byte to an unmanaged stream.
 /// </summary>
 protected unsafe int WriteByte(FreeImageIO io, fi_handle handle, byte value)
 {
     return (int)io.writeProc(new IntPtr(&value), 1, 1, handle);
 }
示例#4
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        // Saving function
        protected override bool SaveProc(ref FreeImageIO io, FIBITMAP dib, fi_handle handle, int page, int flags, IntPtr data)
        {
            SerialDib sdib;
            uint size = FreeImage.GetDIBSize(dib);

            // Store all data needed to recreate the bitmap
            sdib.width = FreeImage.GetWidth(dib);
            sdib.height = FreeImage.GetHeight(dib);
            sdib.pitch = (int)FreeImage.GetPitch(dib);
            sdib.bpp = FreeImage.GetBPP(dib);
            sdib.red_mask = FreeImage.GetRedMask(dib);
            sdib.green_mask = FreeImage.GetGreenMask(dib);
            sdib.blue_mask = FreeImage.GetBlueMask(dib);
            sdib.data = new byte[size];

            // Copy the bitmaps data into the structures byte-array
            // The marshaller is used to create an IntPtr for using
            // 'ConvertToRawBits'.
            FreeImage.ConvertToRawBits(Marshal.UnsafeAddrOfPinnedArrayElement(sdib.data, 0),
                          dib, sdib.pitch, sdib.bpp,
                          sdib.red_mask, sdib.green_mask, sdib.blue_mask,
                          false);

            // Use the healper function to write the header to the destination
            if (Write(io, handle, (uint)header.Length, 1, ref header) != 1)
                return false;

            // Create a serializer
            BinaryFormatter formatter = new BinaryFormatter();

            // Create a temporary stream
            MemoryStream stream = new MemoryStream();

            // Create a compression stream
            GZipStream zipStream = new GZipStream(stream, CompressionMode.Compress);

            // Serialize the structure into the compression stream
            formatter.Serialize(zipStream, sdib);

            // Unload the compression stream
            zipStream.Dispose();

            // Get the result data
            byte[] buffer = stream.GetBuffer();

            // Use the healper function 'Write' to write the data to the destination
            if (Write(io, handle, 1, (uint)buffer.Length, ref buffer) != buffer.Length)
            {
                // Unload the temporary stream
                stream.Dispose();
                return false;
            }

            // Unload the temporary stream
            stream.Dispose();
            return true;
        }
示例#5
0
 /// <summary>
 /// Function that can be implemented.
 /// </summary>
 protected virtual void CloseProc(ref FreeImageIO io, fi_handle handle, IntPtr data)
 {
 }
示例#6
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 /// <summary>
 /// Writes to an unmanaged stream.
 /// </summary>
 protected unsafe int Write(FreeImageIO io, fi_handle handle, uint size, uint count, ref byte[] buffer)
 {
     fixed (byte* ptr = buffer)
     {
         return (int)io.writeProc(new IntPtr(ptr), size, count, handle);
     }
 }
示例#7
0
 /// <summary>
 /// Seeks in an unmanaged stream.
 /// </summary>
 protected int Seek(FreeImageIO io, fi_handle handle, int offset, SeekOrigin origin)
 {
     return io.seekProc(handle, offset, origin);
 }
        public static extern FIMULTIBITMAP OpenMultiBitmapFromHandle(FREE_IMAGE_FORMAT fif, ref FreeImageIO io,
			fi_handle handle, FREE_IMAGE_LOAD_FLAGS flags);
示例#9
0
 /// <summary>
 /// Reads a single byte from an unmanaged stream.
 /// </summary>
 protected unsafe int ReadByte(FreeImageIO io, fi_handle handle)
 {
     byte buffer = 0;
     return (int)io.readProc(new IntPtr(&buffer), 1, 1, handle) > 0 ? buffer : -1;
 }
示例#10
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 /// <summary>
 /// Function that can be implemented.
 /// </summary>
 protected virtual bool SaveProc(ref FreeImageIO io, FIBITMAP dib, fi_handle handle, int page, int flags, IntPtr data)
 {
     return false;
 }
示例#11
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 /// <summary>
 /// Function that can be implemented.
 /// </summary>
 protected virtual int PageCountProc(ref FreeImageIO io, fi_handle handle, IntPtr data)
 {
     return 0;
 }
示例#12
0
 /// <summary>
 /// Function that can be implemented.
 /// </summary>
 protected virtual IntPtr OpenProc(ref FreeImageIO io, fi_handle handle, bool read)
 {
     return IntPtr.Zero;
 }
示例#13
0
 /// <summary>
 /// Function that can be implemented.
 /// </summary>
 protected virtual FIBITMAP LoadProc(ref FreeImageIO io, fi_handle handle, int page, int flags, IntPtr data)
 {
     return FIBITMAP.Zero;
 }
 public static extern FREE_IMAGE_FORMAT GetFileTypeFromHandle(ref FreeImageIO io, fi_handle handle, int size);
示例#15
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 /// <summary>
 /// Retrieves the position of an unmanaged stream.
 /// </summary>
 protected int Tell(FreeImageIO io, fi_handle handle)
 {
     return io.tellProc(handle);
 }
 public static extern FIBITMAP LoadFromHandle(FREE_IMAGE_FORMAT fif, ref FreeImageIO io, fi_handle handle, FREE_IMAGE_LOAD_FLAGS flags);
示例#17
0
 /// <summary>
 /// Function that can be implemented.
 /// </summary>
 protected virtual bool ValidateProc(ref FreeImageIO io, fi_handle handle)
 {
     return false;
 }
        public static extern bool SaveToHandle(FREE_IMAGE_FORMAT fif, FIBITMAP dib, ref FreeImageIO io, fi_handle handle,
			FREE_IMAGE_SAVE_FLAGS flags);
示例#19
0
 public void FreeImage_SaveToHandle()
 {
     FreeImageIO io = new FreeImageIO();
     FreeImage.SaveToHandle(FREE_IMAGE_FORMAT.FIF_BMP, dib, ref io, new fi_handle(), FREE_IMAGE_SAVE_FLAGS.DEFAULT);
 }