private int width; // X Resolution of the biggest Mipmap
// Y Resolution of the biggest Mipmap
// The color-palette for non-compressed pictures
public BlpFile(Stream stream)
{
this.str = stream;
fDXTDecompression = new DXTDecompression();
byte[] buffer = new byte[4];
// Well, have to fix this... looks weird o.O
this.str.Read(buffer, 0, 4);
// Checking for correct Magic-Code
if ((new ASCIIEncoding()).GetString(buffer) != "BLP2")
throw new Exception("Invalid BLP Format");
// Reading type
str.Read(buffer, 0, 4);
this.type = BitConverter.ToUInt32(buffer, 0);
if (this.type != 1)
throw new Exception("Invalid BLP-Type! Should be 1 but " + this.type + " was found");
// Reading encoding, alphaBitDepth, alphaEncoding and hasMipmaps
this.str.Read(buffer, 0, 4);
this.encoding = buffer[0];
this.alphaDepth = buffer[1];
this.alphaEncoding = buffer[2];
this.hasMipmaps = buffer[3];
// Reading width
str.Read(buffer, 0, 4);
this.width = BitConverter.ToInt32(buffer, 0);
// Reading height
str.Read(buffer, 0, 4);
this.height = BitConverter.ToInt32(buffer, 0);
// Reading MipmapOffset Array
for (int i = 0; i < 16; i++)
{
stream.Read(buffer, 0, 4);
this.mipmapOffsets[i] = BitConverter.ToUInt32(buffer, 0);
}
// Reading MipmapSize Array
for (int i = 0; i < 16; i++)
{
str.Read(buffer, 0, 4);
this.mippmapSize[i] = BitConverter.ToUInt32(buffer, 0);
}
// When encoding is 1, there is no image compression and we have to read a color palette
if (this.encoding == 1)
{
// Reading palette
for (int i = 0; i < 256; i++)
{
byte[] color = new byte[4];
str.Read(color, 0, 4);
this.paletteBGRA[i].blue = color[0];
this.paletteBGRA[i].green = color[1];
this.paletteBGRA[i].red = color[2];
this.paletteBGRA[i].alpha = color[3];
}
}
}