public override ImageMetaData ReadMetaData(IBinaryStream stream)
{
var header = stream.ReadHeader(20);
if (!header.AsciiEqual("*Pola* "))
{
return(null);
}
int unpacked_size = header.ToInt32(8);
using (var reader = new PolaReader(stream, 64))
{
reader.Unpack();
using (var temp = BinaryStream.FromArray(reader.Data, stream.Name))
{
var info = base.ReadMetaData(temp);
if (null == info)
{
return(null);
}
return(new PolaMetaData
{
Width = info.Width,
Height = info.Height,
BPP = info.BPP,
UnpackedSize = unpacked_size,
});
}
}
}
public override ImageData Read(IBinaryStream stream, ImageMetaData info)
{
var meta = (ApsMetaData)info;
stream.Position = meta.DataOffset;
byte[] image_data;
if (meta.IsPacked)
{
using (var reader = new LzReader(stream.AsStream, meta.PackedSize, meta.UnpackedSize))
{
reader.Unpack();
image_data = reader.Data;
}
}
else
{
image_data = stream.ReadBytes((int)meta.UnpackedSize);
}
using (var unpacked = BinaryStream.FromArray(image_data, stream.Name))
{
var ap_info = base.ReadMetaData(unpacked);
if (null == ap_info)
{
throw new InvalidFormatException();
}
return(base.Read(unpacked, ap_info));
}
}
public override ImageData Read(IBinaryStream stream, ImageMetaData info)
{
var meta = (PolaMetaData)info;
stream.Position = meta.DataOffset;
var reader = new PolaReader(stream, meta.UnpackedSize);
reader.Unpack();
using (var temp = BinaryStream.FromArray(reader.Data, stream.Name))
return(base.Read(temp, info));
}
public override ImageMetaData ReadMetaData(IBinaryStream stream)
{
var header = stream.ReadHeader(20);
if (!header.AsciiEqual("*Pola"))
{
return(null);
}
bool new_version = header.AsciiEqual(5, "* ");
uint data_offset = new_version ? 20u : 13u;
int unpacked_size = header.ToInt32(8);
stream.Position = data_offset;
var reader = new PolaReader(stream, 64);
reader.Unpack();
using (var temp = BinaryStream.FromArray(reader.Data, stream.Name))
{
var info = base.ReadMetaData(temp);
if (null == info)
{
return(null);
}
if (!new_version)
{
unpacked_size = 0x10 + GetStride(info) * (int)info.Height;
}
return(new PolaMetaData
{
Width = info.Width,
Height = info.Height,
BPP = info.BPP,
DataOffset = data_offset,
UnpackedSize = unpacked_size,
});
}
}
public override void Write(Stream file, ImageData image)
{
var header = new byte[0x14];
var depth = (short)(24 == image.BPP ? 0 : 32 == image.BPP ? 1 : 2);
var compression = (ushort)3;
var flags = (ushort)17;
var mode = (ushort)0;
using (var memeStream = new MemoryStream(header))
{
using (var binaryWriter = new BinaryWriter(memeStream))
{
binaryWriter.Write(Signature);
binaryWriter.Write((ushort)image.OffsetX);
binaryWriter.Write((ushort)image.OffsetY);
binaryWriter.Write((ushort)image.Width);
binaryWriter.Write((ushort)image.Height);
binaryWriter.Write(compression);
binaryWriter.Write(flags);
binaryWriter.Write(depth);
binaryWriter.Write(mode);
}
}
var metaData = ReadMetaData(BinaryStream.FromArray(header, ""));
var bitmap = image.Bitmap;
var pixelFormat = CheckFormat(image.BPP);
int stride = (int)(image.Width * pixelFormat.BitsPerPixel / 8 + 3) & ~3;
if (pixelFormat != bitmap.Format)
{
var converted_bitmap = new FormatConvertedBitmap();
converted_bitmap.BeginInit();
converted_bitmap.Source = image.Bitmap;
converted_bitmap.DestinationFormat = pixelFormat;
converted_bitmap.EndInit();
bitmap = converted_bitmap;
}
var data = new byte[image.Height * stride];
var row_data = new byte[stride];
var rect = new Int32Rect(0, 0, (int)image.Width, 1);
for (uint row = 0; row < image.Height; ++row)
{
bitmap.CopyPixels(rect, row_data, stride, 0);
rect.Y++;
row_data.CopyTo(data, row * stride);
}
using (var binaryWriter = new BinaryWriter(file))
{
binaryWriter.Write(header);
using (var writer = new Writer(data,
binaryWriter, (CrxMetaData)metaData))
{
writer.Write();
}
}
}