private Rott2DPicHeader _picHeader; //small picture texture header
#endregion
#region Constructor
/// <summary>
/// Constructor
/// </summary>
public Rott2DPic(ref byte[] picLumpData, ref Rott2DPalette palette)
{
this.isHeaderReady = false;
this.isReady = false;
this._rawData = picLumpData;
this._palette = palette;
//process header data first
this._picHeader = new Rott2DPicHeader();
this.ProcessPicHeader();
//create buffer from size
if ((this._buffer == null) && (this.isHeaderReady))
{
this._buffer = new Bitmap(this._picHeader.PicWidth, this._picHeader.PicHeight, PixelFormat.Format24bppRgb);
}
//generate buffer bitmap
this.ProcessLumpData();
}
/// <summary>
/// Figure if we have a small picture (pic_t; GUI overlay textures)
/// </summary>
public static bool isPicTexture(byte[] lumpdata)
{
/*
* small picture header is 2 bytes
* the actual header structure only contains width and height in byte (= 2 bytes)
*
* on a key image (8x16 in size) are the first foud bytes always:
* x * 4 ==> width. You have to multiply by four. (value * 4)
* y ==> Height
*
* A second paramter to check for are the two trailing bytes.
* These two trailing bytes are a left over from Doom alpha versions.
*
*/
bool isPic = false;
if (lumpdata.Length > Rott2DPicHeader.PIC_HEADER_SIZE)
{
//PIC_UPPER_PLANE_BOUNDS is 80, reason:
//80 * 4 = 320. This is the largest pic format found in ROTT wad files.
//so this explains why upper plane bounds size is set to be 80.
Rott2DPicHeader header = new Rott2DPicHeader();
header.PicPlaneSize = lumpdata[0]; //plane size
header.PicHeight = lumpdata[1]; //read height as byte
byte trailing1 = lumpdata[lumpdata.Length - 2]; //trailing bytes
byte trailing2 = lumpdata[lumpdata.Length - 1];
if (((((header.PicWidth * header.PicHeight) + (Rott2DPicHeader.PIC_HEADER_SIZE + Rott2DPicHeader.PIC_TRAIL_SIZE)) == lumpdata.Length)) && (header.PicPlaneSize <= Rott2DPicHeader.PIC_UPPER_PLANE_BOUNDS))
{
if ((trailing1 == 0) && (trailing2 == 0))
{
isPic = true;
}
}
}
return(isPic);
}
