public static ChunkyDataPTBN CreateFromTGA(int version, string name, byte[] tgaData)
{
//check image type code
if (tgaData[2] != 0x03)
{
bool worked = false;
if (tgaData[1] == 0x01 && tgaData[2] == 0x01)
{
tgaData = ImageConverter.ColourMapToGreyscale(tgaData);
worked = true;
}
if (!worked)
{
ImageConverter.MapEncStruct format = ImageConverter.getMapEncStruct(tgaData[2]);
throw new InvalidFileException("_banner.tga must be an unencoded unmapped monochrome Targa image.\r\n" +
" Image type: " + format.formatType + "\r\n" +
" Image encoded: " + ((format.isEncoded)?"yes":"no") + "\r\n" +
" Colour mapped: " + ((format.isMapped)?"yes":"no"));
}
}
//check colour depth
if (tgaData[16] != 0x08)
{
throw new InvalidFileException("_banner.tga must be an 8-bit Targa image. Image was " + tgaData[16] + "-bit.");
}
float pos_x = float.MinValue;
float pos_y = float.MinValue;
int width = (int)tgaData[12] + (((int)tgaData[13]) << 8);
int height = (int)tgaData[14] + (((int)tgaData[15]) << 8);
int currPos = 0;
int size_x_int = (int)size_x;
for (currPos = 18; currPos < tgaData.Length; currPos += size_x_int)
{
//try to find out badge;
if (tgaData[currPos] == byte.MaxValue)
{
pos_y = (float)((currPos - 18) / width);
pos_x = (float)(currPos - 18 - (pos_y * height));
break;
}
}
if (pos_y != float.MinValue)
{
int maxPossibleEnd = currPos + width;
int extra = 0;
while (currPos < maxPossibleEnd && tgaData[currPos] == byte.MaxValue)
{
currPos++;
extra++;
}
//check where the left hand side should start
if (pos_x > 0 && (tgaData[currPos - size_x_int] != byte.MaxValue || tgaData[currPos - size_x_int - 1] != byte.MinValue))
{
throw new InvalidFileException("Banner is positioned beyond the edge of the texture");
}
else
{
pos_x = pos_x + extra - size_x;
}
//and check for the top - not all of the block, just assume a left and bottom side are OK
int aboveTop = currPos - size_x_int + (width * (int)size_y);
for (int i = currPos - size_x_int; i <= aboveTop && i < tgaData.Length; i += width)
{
if (tgaData[i] != byte.MaxValue && i != aboveTop)
{
throw new InvalidFileException("Banner area is too small. Banner must be 64px by 96px");
}
}
//if we got here, it's all OK
byte[] data = new byte[16];
BitConverter.GetBytes(pos_x).CopyTo(data, 0);
BitConverter.GetBytes(pos_y).CopyTo(data, 4);
BitConverter.GetBytes((float)size_x).CopyTo(data, 8);
BitConverter.GetBytes((float)size_y).CopyTo(data, 12);
return(new ChunkyDataPTBN(version, name, data));
}
else
{
return(null);
}
}
public static ChunkyDataPTLD CreateFromTGA(PTLD_Layers layer_in, int version, string name, byte[] tgaData)
{
//check image type code
if (tgaData[2] != 0x03)
{
bool worked = false;
if (tgaData[1] == 0x01 && tgaData[2] == 0x01)
{
tgaData = ImageConverter.ColourMapToGreyscale(tgaData);
worked = true;
}
if (!worked)
{
ImageConverter.MapEncStruct format = ImageConverter.getMapEncStruct(tgaData[2]);
throw new InvalidFileException("_" + layer_in.ToString() + ".tga must be an unencoded unmapped monochrome Targa image.\r\n" +
" Image type: " + format.formatType + "\r\n" +
" Image encoded: " + ((format.isEncoded)?"yes":"no") + "\r\n" +
" Colour mapped: " + ((format.isMapped)?"yes":"no"));
}
}
//check colour depth
if (tgaData[16] != 0x08)
{
throw new InvalidFileException("_" + layer_in.ToString() + ".tga must be an 8-bit Targa image. Image was " + tgaData[16] + "-bit.");
}
int width = tgaData[12] + (tgaData[13] << 8);
int height = tgaData[14] + (tgaData[15] << 8);
byte[] data = new byte[width * height + 8]; //only take the correct number of bytes so that we don't include comments
int layerDataLength = data.Length - 8;
int layer = (int)layer_in;
data[0] = (byte)(layer);
data[1] = (byte)(layer >> 8);
data[2] = (byte)(layer >> 16);
data[3] = (byte)(layer >> 24);
data[4] = (byte)layerDataLength;
data[5] = (byte)(layerDataLength >> 8);
data[6] = (byte)(layerDataLength >> 16);
data[7] = (byte)(layerDataLength >> 24);
int offset = 10 + tgaData[0]; //should be 18, but we're starting at i=8 so remove 8 here as well
bool nonBlack = false; //boolean to check whether they actually included any data in the layer
for (int i = 8; i < data.Length; i++)
{
data[i] = tgaData[i + offset]; //take in to account any possible image ID
if (data[i] > 5)
{
nonBlack = true;
}
}
//make sure we always return a dirt layer, even if they made it all black (all teamcolourable)
if (nonBlack || layer_in == PTLD_Layers.Dirt)
{
return(new ChunkyDataPTLD(version, name, data));
}
else
{
return(null);
}
}
