public override Image GetMipmapImage(int mipmapIndex)
{
if (mipmapIndex < 0 || mipmapIndex >= m_mipmaps.Count)
{
throw new ArgumentOutOfRangeException("mipmapIndex", mipmapIndex, "Index must be non-negative and less than the number of mipmaps in this BLP file.");
}
Blp2MipMap mipmap = m_mipmaps[mipmapIndex];
Image result = null;
if (m_cmpType == Blp2CompressionType.Palette)
{
result = FromPalette(mipmap);
}
else if (m_cmpType == Blp2CompressionType.DirectX)
{
if (m_alphaBits == 0 || m_alphaBits == 1)
{
result = FromDxt1(mipmap);
}
else if (m_alphaBits == 8)
{
result = FromDxt5(mipmap);
}
}
else
{
result = FromJpeg(mipmap);
}
return(result);
}
private Image FromJpeg(Blp2MipMap mipmap)
{
byte[] result = new byte[BLP1_JPG_HEADER_SIZE + mipmap.Data.Length];
Buffer.BlockCopy(m_jpgHeader, 0, result, 0, m_jpgHeader.Length);
Buffer.BlockCopy(mipmap.Data, 0, result, BLP1_JPG_HEADER_SIZE, mipmap.Data.Length);
Image img;
using (MemoryStream ms = new MemoryStream(result, false))
{
img = Image.FromStream(ms, false, false);
}
return(img);
}
private Image FromPalette(Blp2MipMap mipmap)
{
Bitmap bmp = new Bitmap(mipmap.Size.Width, mipmap.Size.Height, PixelFormat.Format32bppArgb);
byte[] mipmapData = mipmap.Data;
int[] result = new int[mipmap.Size.Width * mipmap.Size.Height];
for (int i = 0; i < result.Length; i++)
{
Color paletteEntry = m_palette[mipmapData[i]];
result[i] = paletteEntry.ToArgb();
}
BitmapData bmpData = bmp.LockBits(new Rectangle(Point.Empty, mipmap.Size), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
Marshal.Copy(result, 0, bmpData.Scan0, result.Length);
bmp.UnlockBits(bmpData);
return(bmp);
}
private void ParseInternal(Stream stream)
{
using (BinaryReader br = new BinaryReader(stream))
{
br.ReadInt32(); // unknown
m_cmpType = (Blp2CompressionType)br.ReadByte();
m_alphaBits = br.ReadByte();
int paletteBits = br.ReadByte();
br.ReadByte(); // unknown
int width = br.ReadInt32();
int height = br.ReadInt32();
Size fullImageSize = new Size(width, height);
m_mainSize = fullImageSize;
int[] mipmapOffsets = new int[MAX_MIPMAP_COUNT];
for (int i = 0; i < MAX_MIPMAP_COUNT; i++)
{
mipmapOffsets[i] = br.ReadInt32();
}
int[] sizes = new int[MAX_MIPMAP_COUNT];
for (int i = 0; i < MAX_MIPMAP_COUNT; i++)
{
sizes[i] = br.ReadInt32();
}
if (m_cmpType == Blp2CompressionType.Palette)
{
if (paletteBits != 8)
{
throw new ArgumentException("Palettized data can only have 8 bits per pixel.", "stream");
}
}
else if (m_cmpType == Blp2CompressionType.DirectX)
{
if (m_alphaBits != 0 && m_alphaBits != 8 && m_alphaBits != 1)
{
throw new ArgumentException("DXT2/DXT4-compressed images are not yet supported.");
}
}
else if (m_cmpType == Blp2CompressionType.Jpeg)
{
}
else
{
throw new ArgumentException("Unknown file format.");
}
if (m_cmpType == Blp2CompressionType.Palette)
{
ParsePalette(stream, br);
}
else if (m_cmpType == Blp2CompressionType.Jpeg)
{
ParseJpegHeader(stream, br);
}
for (int i = 0; i < MAX_MIPMAP_COUNT; i++)
{
int currentOffset = mipmapOffsets[i];
int currentSize = sizes[i];
if (currentOffset == 0 || currentSize == 0)
{
break;
}
Size mipmapSize = Blp1Parser.GetSize(fullImageSize, i);
byte[] data = new byte[currentSize];
stream.Seek(currentOffset, SeekOrigin.Begin);
br.Read(data, 0, currentSize);
Blp2MipMap mipmap = new Blp2MipMap(mipmapSize, i, data);
m_mipmaps.Add(mipmap);
}
}
}
private Image FromDxt1(Blp2MipMap mipmap)
{
int[] data = DXTCFormat.DecodeDXT1(mipmap.Size.Width, mipmap.Size.Height, mipmap.Data);
return(FromBinary(mipmap.Size.Width, mipmap.Size.Height, data));
}
private void ParseInternal(Stream stream)
{
using (BinaryReader br = new BinaryReader(stream))
{
br.ReadInt32(); // unknown
m_cmpType = (Blp2CompressionType)br.ReadByte();
m_alphaBits = br.ReadByte();
int paletteBits = br.ReadByte();
br.ReadByte(); // unknown
int width = br.ReadInt32();
int height = br.ReadInt32();
Size fullImageSize = new Size(width, height);
m_mainSize = fullImageSize;
int[] mipmapOffsets = new int[MAX_MIPMAP_COUNT];
for (int i = 0; i < MAX_MIPMAP_COUNT; i++)
mipmapOffsets[i] = br.ReadInt32();
int[] sizes = new int[MAX_MIPMAP_COUNT];
for (int i = 0; i < MAX_MIPMAP_COUNT; i++)
sizes[i] = br.ReadInt32();
if (m_cmpType == Blp2CompressionType.Palette)
{
if (paletteBits != 8)
throw new ArgumentException("Palettized data can only have 8 bits per pixel.", "stream");
}
else if (m_cmpType == Blp2CompressionType.DirectX)
{
if (m_alphaBits != 0 && m_alphaBits != 8 && m_alphaBits != 1)
throw new ArgumentException("DXT2/DXT4-compressed images are not yet supported.");
}
else if (m_cmpType == Blp2CompressionType.Jpeg)
{
}
else
{
throw new ArgumentException("Unknown file format.");
}
if (m_cmpType == Blp2CompressionType.Palette)
{
ParsePalette(stream, br);
}
else if (m_cmpType == Blp2CompressionType.Jpeg)
{
ParseJpegHeader(stream, br);
}
for (int i = 0; i < MAX_MIPMAP_COUNT; i++)
{
int currentOffset = mipmapOffsets[i];
int currentSize = sizes[i];
if (currentOffset == 0 || currentSize == 0)
break;
Size mipmapSize = Blp1Parser.GetSize(fullImageSize, i);
byte[] data = new byte[currentSize];
stream.Seek(currentOffset, SeekOrigin.Begin);
br.Read(data, 0, currentSize);
Blp2MipMap mipmap = new Blp2MipMap(mipmapSize, i, data);
m_mipmaps.Add(mipmap);
}
}
}
private Image FromPalette(Blp2MipMap mipmap)
{
Bitmap bmp = new Bitmap(mipmap.Size.Width, mipmap.Size.Height, PixelFormat.Format32bppArgb);
byte[] mipmapData = mipmap.Data;
int[] result = new int[mipmap.Size.Width * mipmap.Size.Height];
for (int i = 0; i < result.Length; i++)
{
Color paletteEntry = m_palette[mipmapData[i]];
result[i] = paletteEntry.ToArgb();
}
BitmapData bmpData = bmp.LockBits(new Rectangle(Point.Empty, mipmap.Size), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
Marshal.Copy(result, 0, bmpData.Scan0, result.Length);
bmp.UnlockBits(bmpData);
return bmp;
}
private Image FromJpeg(Blp2MipMap mipmap)
{
byte[] result = new byte[BLP1_JPG_HEADER_SIZE + mipmap.Data.Length];
Buffer.BlockCopy(m_jpgHeader, 0, result, 0, m_jpgHeader.Length);
Buffer.BlockCopy(mipmap.Data, 0, result, BLP1_JPG_HEADER_SIZE, mipmap.Data.Length);
Image img;
using (MemoryStream ms = new MemoryStream(result, false))
{
img = Image.FromStream(ms, false, false);
}
return img;
}
private Image FromDxt5(Blp2MipMap mipmap)
{
int[] data = DXTCFormat.DecodeDXT2(mipmap.Size.Width, mipmap.Size.Height, mipmap.Data);
return FromBinary(mipmap.Size.Width, mipmap.Size.Height, data);
}