public bool IsSatisfiedBy(DaxFileBlock block)
{
var data = block.Data;
if (data.Length < 20)
{
return(false);
}
int height = data[0];
int width = data[1];
var widthPx = width * 8;
var heightPx = height;
if (widthPx < 1 || heightPx < 1 || widthPx > 320 || heightPx > 200)
{
return(false);
}
var chunkCount = data[6] + (data[7] << 8);
var chunkSize = (widthPx * heightPx);
if ((chunkCount * chunkSize) > data.Length)
{
return(false);
}
int clrBase = data[8];
int clrCount = data[9];
var clrs = EgaVgaPalette.ExtractPalette(data, clrCount, clrBase, 10);
return(clrs != null);
}
private string GetMapNameFrom(DaxFileBlock block)
{
var mapname = block.Id.ToString();
var game = FileHelper.DetermineGameFrom(block.File);
if (game != FileHelper.GameList.Unknown)
{
// do we have a map with that id?
if (_mapNames.ContainsKey((int)game))
{
var names = _mapNames[(int)game];
if (names.ContainsKey(block.Id))
{
mapname = names[block.Id];
}
}
}
return(mapname);
}
public IRenderBlock CreateUsing(DaxFileBlock block)
{
if (new EgaSpriteBlockSpecification().IsSatisfiedBy(block))
{
return(new EgaSpriteBlock(block));
}
if (new VgaStrataBlockSpecification().IsSatisfiedBy(block))
{
return(new VgaStrataBlock(block));
}
if (new VgaSpriteBlockSpecification().IsSatisfiedBy(block))
{
return(new VgaSpriteBlock(block));
}
if (new VgaMixedBlockSpecification().IsSatisfiedBy(block))
{
return(new VgaMixedBlock(block));
}
if (new VgaBlockSpecification().IsSatisfiedBy(block))
{
return(new VgaBlock(block));
}
if (new EgaBlockSpecification().IsSatisfiedBy(block))
{
return(new EgaBlock(block));
}
if (new MonoBlockSpecification().IsSatisfiedBy(block))
{
return(new MonoBlock(block));
}
return(new UnknownBlock());
}
// scan the designated ecl file/block for wallset loading commands, return the first one
private void scanECLFileForWallset(DaxFileBlock block, int geoID, int blockID)
{
// scan for the load pieces command, which consists of the pattern 0x37 a 0x00 b 0x00 c 0x00, where a, b and c are the wallsets to load
byte load_pieces = 0x37;
for (int i = 0; i < block.Data.Length - 7; i++)
{
if (block.Data[i] == load_pieces && block.Data[i + 1] == 0 && block.Data[i + 3] == 0 && block.Data[i + 5] == 0)
{
int a = block.Data[i + 2];
int b = block.Data[i + 4];
int c = block.Data[i + 6];
int[] ws = { a, b, c };
if (isValidWallSetId(a) && isValidWallSetId(b) && isValidWallSetId(c))
{
if (!wallsetMapping.ContainsKey(geoID))
{
wallsetMapping.Add(geoID, ws);
}
}
}
}
}
