public TextureLumpInfo(TextureByteIndexPaletteWithMipmaps texture)
{
if (texture.Name.Length > NameLength - 1)
{
throw new ArgumentOutOfRangeException("texture");
}
char[] name = new char[NameLength];
for (int i = 0; i < texture.Name.Length; i++)
{
name[i] = texture.Name[i];
}
this.Width = (uint)texture.Width;
this.Height = (uint)texture.Height;
this.MipmapOffsets = new uint[MipmapOffsetsLength];
}
/// <summary>
/// Load texture (with mipmaps) of this TextureLumpInfo.
/// </summary>
/// <param name="reader">Source stream.</param>
/// <param name="texture_offset">Offset of this TextureLumpInfo in source stream.</param>
public TextureByteIndexPaletteWithMipmaps LoadTexture(BinaryReader reader, long texture_offset = 0)
{
reader.BaseStream.Position = texture_offset + this.MipmapOffsets[0];
// Indices to main texture (mipmap[0])
byte[] indices = reader.ReadBytes((int)(this.Width * this.Height));
// Loading color palette (after last mipmap)
int last_mipmap_index = this.MipmapOffsets.Length - 1;
reader.BaseStream.Position = (long)texture_offset + this.MipmapOffsets[last_mipmap_index] + ((this.Width / (int)Math.Pow(2, last_mipmap_index)) * (this.Height / (int)Math.Pow(2, last_mipmap_index))) + 2;
Color[] palette = new Color[256];
for (int p = 0; p < palette.Length; p++)
{
byte r = reader.ReadByte();
byte g = reader.ReadByte();
byte b = reader.ReadByte();
palette[p] = new Color(r / 255f, g / 255f, b / 255f);
}
// Last index is transparent
if (palette[255].r == 0 && palette[255].g == 0 && palette[255].b == 1f)
{
palette[255] = new Color(0, 0, 0, 0);
}
// Texture instance (with main texture and color palette)
var texture = new TextureByteIndexPaletteWithMipmaps(this.Name_s, (int)this.Width, (int)this.Height, indices, palette);
// Adding mipmaps to texture instance
// mipmap[1] is first mipmap (0 is main texture)
// Each mipmap has half dimensions then previous one
for (int mipmap_level = 1; mipmap_level < this.MipmapOffsets.Length; mipmap_level++)
{
reader.BaseStream.Position = (long)texture_offset + this.MipmapOffsets[mipmap_level];
int width = (int)(this.Width / Math.Pow(2, mipmap_level));
int height = (int)(this.Height / Math.Pow(2, mipmap_level));
texture.AddMipmap(mipmap_level, reader.ReadBytes(width * height));
}
return(texture);
}
/// <summary>
/// Save texture data.
/// This should be run after saving the TextureLumpInfo
/// </summary>
/// <param name="writer">Output stream.</param>
/// <param name="texture">Texture to save. Only transparent color can be palette[255] and must be R=0,G=0,B=255.</param>
public static void SaveTexture(BinaryWriter writer, TextureByteIndexPaletteWithMipmaps texture)
{
// All MipMaps (including main texture)
for (int m = 0; m < TextureLumpInfo.MipmapOffsetsLength; m++)
{
writer.Write(texture.GetMipmap(m));
writer.Flush();
}
writer.Write((ushort)0);//2 dummy bytes
writer.Flush();
// Color palette
{
// Used colors in palette
for (int p = 0; p < texture.Palette.Length; p++)
{
var c = texture.Palette[p];
writer.Write((byte)(c.r * 255)); //R
writer.Write((byte)(c.g * 255)); //G
writer.Write((byte)(c.b * 255)); //B
}
// Unused colors in palette
for (int p = texture.Palette.Length; p < 255; p++)
{
writer.Write(0); //R
writer.Write(0); //G
writer.Write(0); //B
}
// Transparent blue if unused
if (texture.Palette.Length < 255)
{
// Index: 255
writer.Write(0); //R
writer.Write(0); //G
writer.Write(255); //B
}
}
writer.Flush();
}
