private Rott2DPatchHeader _patchHeader; //patch header
#endregion
#region Constructor
/// <summary>
/// Constructor
/// </summary>
public Rott2DPatch(ref byte[] patchLumpData, ref Rott2DPalette palette)
{
this.isHeaderReady = false;
this.isReady = false;
this._rawData = patchLumpData;
this._palette = palette;
//process header data first
this._patchHeader = new Rott2DPatchHeader();
this.ProcessPatchHeader();
//create buffer from size
if ((this._buffer == null) && (this.isHeaderReady))
{
this._buffer = new Bitmap(this._patchHeader.PatchWidth, this._patchHeader.PatchHeight, PixelFormat.Format24bppRgb);
}
//generate buffer bitmap
this.ProcessLumpData();
}
/// <summary>
/// Figure if we have a Patch (lpic_t; floor, ceiling and menu texures)
/// </summary>
public static bool isPatchTexture(byte[] lumpdata)
{
/*
* Patches start always with 4 bytes (2x short) data for width and height.
* Pixel count is mostly 16384 in size (total 16392 including the 4 bytes header data).
*
*/
bool isPatch = false;
if (lumpdata.Length > Rott2DPatchHeader.PATCH_HEADER_SIZE)
{
Rott2DPatchHeader header = new Rott2DPatchHeader();
header.PatchWidth = BitConverter.ToUInt16(lumpdata, 0); //width of texture
header.PatchHeight = BitConverter.ToUInt16(lumpdata, 2); //height of texture
//measure total data size
ushort pixelCount = (ushort)(header.PatchWidth * header.PatchHeight); //calculate size of actual pixels, should be 16384
//Note: needed strikt bounds checking or else some larger masked textures where recognized as patches.
if (((pixelCount == PATCH_FC_SIZE) || (pixelCount == PATCH_PLANE_SIZE) || (pixelCount == PATCH_TRILOGO_SIZE)) && (header.PatchWidth <= 320) && (header.PatchHeight <= 200))
{
//16-02-2012 new bug introduced again: some 128x128 masked textures are recognized as patches.
//we need to check first of we have a valid patch by calculating the byte size
//a (trans-)masked would result in a larger value
if (header.PatchWidth * header.PatchHeight + 8 == lumpdata.Length)
{
isPatch = true;
}
}
}
return(isPatch);
}
