Пример #1
0
        /* File Header Section
         * Len  Description         Value
         *  4   Signature           "8BPS"
         *  2   Version             1
         *  6   Reserved            not used.
         *  2   Channels            1 ~ 56
         *  4   Height              1 ~ 30,000
         *  4   Width               1 ~ 30,000
         *  2   Color Depth         1, 8, 16, 32
         *  2   Color Mode          1 ~ 9
         */
        private static void ReadHeader(ref PsdInfo info, PSDReader reader)
        {
            // Signature
            if (reader.ReadByte() != 0x38 ||
                reader.ReadByte() != 0x42 ||
                reader.ReadByte() != 0x50 ||
                reader.ReadByte() != 0x53)
            {
                throw new NotSupportedException();
            }

            // Version
            var version = reader.ReadInt16();

            if (version != 1)
            {
                throw new NotSupportedException();
            }

            // Reserved
            reader.Position += 6;

            // Channels
            info.Channels = reader.ReadInt16();

            // Height
            info.Height = reader.ReadInt32();

            // Width
            info.Width = reader.ReadInt32();

            // Color Depth
            info.ColorDepth      = reader.ReadInt16();
            info.ColorDepthBytes = info.ColorDepth / 8;
            if (info.ColorDepthBytes != 1 &&
                info.ColorDepthBytes != 2 &&
                info.ColorDepthBytes != 4)
            {
                throw new NotSupportedException();
            }

            // Color Mode
            info.ColorMode = (ColorMods)reader.ReadInt16();
            if (info.ColorMode == ColorMods.Bitmap)
            {
                throw new NotSupportedException();
            }

            info.Pixcels        = info.Width * info.Height;
            info.SizePerChannel = info.Pixcels * info.ColorDepthBytes;
        }
Пример #2
0
        /* Image Data Section
         * Len  Description         Value
         *  2   Compression Mode    CompressionModes
         *  n   Image Data
         */
        private static void ReadImageData(ref PsdInfo info, PSDReader reader)
        {
            info.CompressionMode = (CompressionModes)reader.ReadInt16();
            int i;

            info.ImageData = new byte[info.Channels][];

            switch (info.CompressionMode)
            {
            case CompressionModes.Raw:
                for (i = 0; i < info.Channels; ++i)
                {
                    info.ImageData[i] = reader.ReadBytes(info.SizePerChannel);
                }
                break;

            case CompressionModes.RLE:
                reader.Position += info.Height * info.Channels * 2;
                for (i = 0; i < info.Channels; ++i)
                {
                    info.ImageData[i] = new byte[info.SizePerChannel];
                    RLEDecompress(reader, info.ImageData[i], info.SizePerChannel);
                }
                break;

            case CompressionModes.ZipWithoutPrediction:
            case CompressionModes.ZipWithPrediction:
                throw new NotSupportedException();
            }
        }
Пример #3
0
        /* Image Data Section
         * Len  Description         Value
         *  2   Compression Mode    CompressionModes
         *  n   Image Data
         */
        private static void ReadImageData(ref PsdInfo info, PSDReader reader)
        {
            info.CompressionMode = (CompressionModes)reader.ReadInt16();
            int i;

            info.ImageData = new byte[info.Channels][];

            switch (info.CompressionMode)
            {
            case CompressionModes.Raw:
                for (i = 0; i < info.Channels; ++i)
                    info.ImageData[i] = reader.ReadBytes(info.SizePerChannel);
                break;

            case CompressionModes.RLE:
                reader.Position += info.Height * info.Channels * 2;
                for (i = 0; i < info.Channels; ++i)
                {
                    info.ImageData[i] = new byte[info.SizePerChannel];
                    RLEDecompress(reader, info.ImageData[i], info.SizePerChannel);
                }
                break;

            case CompressionModes.ZipWithoutPrediction:
            case CompressionModes.ZipWithPrediction:
                throw new NotSupportedException();
            }
        }
Пример #4
0
        /* Image Resources Section
         * Len  Description         Value
         *  4   Length
         *  n   Resource Block Data
        */
        /* Image Resource Blocks
         * Len  Description         Value
         *  4   Signature           '8BIM'
         *  2   Resource Id
         *  n   Name
         *  4   Resource Data Length
         *  n   Resource Data
        */
        private static void ReadImageResources(ref PsdInfo info, PSDReader reader)
        {
            var length = reader.ReadInt32();

            short id;
            int len;

            info.TransparencyIndex = -1;

            long pos = reader.Position + length;
            while (reader.Position < pos)
            {
                // Signature
                if (reader.ReadByte() != 0x38 ||
                    reader.ReadByte() != 0x42 ||
                    reader.ReadByte() != 0x49 ||
                    reader.ReadByte() != 0x4D)
                    throw new NotSupportedException();

                // Resource Id
                id = reader.ReadInt16();

                // Name
                len = reader.ReadByte();
                if (len > 0)
                {
                    if((len % 2) != 0)
                        len = reader.ReadByte();
                    reader.Position += len;
                }
                reader.Position += 1;
                
                // Data Length
                len = reader.ReadInt32();
                if (len % 2 != 0)
                    len++;

                switch (id)
                {
                case 1005: // ResolutionInfo structure
                    info.DpiX = reader.ReadInt16();
                    reader.Position += 6;
                    info.DpiY = reader.ReadInt16();
                    reader.Position += 6;
                    break;

                case 1047: // Transparency Index. 2 bytes for the index of transparent color, if any.
                    info.TransparencyIndex = reader.ReadInt16();
                    break;

                default:
                    reader.Position += len;
                    break;
                }
            }
        }
Пример #5
0
        /* File Header Section
         * Len  Description         Value
         *  4   Signature           "8BPS"
         *  2   Version             1
         *  6   Reserved            not used.
         *  2   Channels            1 ~ 56
         *  4   Height              1 ~ 30,000
         *  4   Width               1 ~ 30,000
         *  2   Color Depth         1, 8, 16, 32
         *  2   Color Mode          1 ~ 9
        */
        private static void ReadHeader(ref PsdInfo info, PSDReader reader)
        {
            // Signature
            if (reader.ReadByte() != 0x38 ||
                reader.ReadByte() != 0x42 ||
                reader.ReadByte() != 0x50 ||
                reader.ReadByte() != 0x53)
                throw new NotSupportedException();

            // Version
            var version = reader.ReadInt16();
            if (version != 1)
                throw new NotSupportedException();

            // Reserved
            reader.Position += 6;

            // Channels
            info.Channels = reader.ReadInt16();

            // Height
            info.Height = reader.ReadInt32();

            // Width
            info.Width = reader.ReadInt32();

            // Color Depth
            info.ColorDepth = reader.ReadInt16();
            info.ColorDepthBytes = info.ColorDepth / 8;
            if (info.ColorDepthBytes != 1 &&
                info.ColorDepthBytes != 2 &&
                info.ColorDepthBytes != 4)
                throw new NotSupportedException();

            // Color Mode
            info.ColorMode = (ColorMods)reader.ReadInt16();
            if (info.ColorMode == ColorMods.Bitmap)
                throw new NotSupportedException();

            info.Pixcels = info.Width * info.Height;
            info.SizePerChannel = info.Pixcels * info.ColorDepthBytes;
        }
Пример #6
0
        /* Image Resources Section
         * Len  Description         Value
         *  4   Length
         *  n   Resource Block Data
         */
        /* Image Resource Blocks
         * Len  Description         Value
         *  4   Signature           '8BIM'
         *  2   Resource Id
         *  n   Name
         *  4   Resource Data Length
         *  n   Resource Data
         */
        private static void ReadImageResources(ref PsdInfo info, PSDReader reader)
        {
            var length = reader.ReadInt32();

            short id;
            int   len;

            info.TransparencyIndex = -1;

            long pos = reader.Position + length;

            while (reader.Position < pos)
            {
                // Signature
                if (reader.ReadByte() != 0x38 ||
                    reader.ReadByte() != 0x42 ||
                    reader.ReadByte() != 0x49 ||
                    reader.ReadByte() != 0x4D)
                {
                    throw new NotSupportedException();
                }

                // Resource Id
                id = reader.ReadInt16();

                // Name
                len = reader.ReadByte();
                if (len > 0)
                {
                    if ((len % 2) != 0)
                    {
                        len = reader.ReadByte();
                    }
                    reader.Position += len;
                }
                reader.Position += 1;

                // Data Length
                len = reader.ReadInt32();
                if (len % 2 != 0)
                {
                    len++;
                }

                switch (id)
                {
                case 1005: // ResolutionInfo structure
                    info.DpiX        = reader.ReadInt16();
                    reader.Position += 6;
                    info.DpiY        = reader.ReadInt16();
                    reader.Position += 6;
                    break;

                case 1047: // Transparency Index. 2 bytes for the index of transparent color, if any.
                    info.TransparencyIndex = reader.ReadInt16();
                    break;

                default:
                    reader.Position += len;
                    break;
                }
            }
        }