/// <summary>
/// Convert an image to a Targa (TGA) file format
/// </summary>
/// <param name="writer">writer to write to</param>
/// <param name="sample">image to sample</param>
public void Serialize(BinaryWriter writer, IColourSampler sampler)
{
var size = sampler.GetSize();
//Header
byte[] header = new byte[18];
header[0] = (byte)0; //ID Length
header[1] = (byte)0; //Colour map type (no colour map)
header[2] = (byte)2; //Image type (uncompressed true-colour image)
//Width (2 bytes)
header[12] = (byte)(255 & size.Width);
header[13] = (byte)(255 & (size.Width >> 8));
//Height (2 bytes)
header[14] = (byte)(255 & size.Height);
header[15] = (byte)(255 & (size.Height >> 8));
header[16] = (byte)24; //Pixel depth
header[17] = (byte)32; //
writer.Write(header);
//Body
for (int row = 0; row < size.Height; row++)
{
for (int column = 0; column < size.Width; column++)
{
Colour c = sampler.GetPixelColour(row, column);
writer.Write(c.B);
writer.Write(c.G);
writer.Write(c.R);
}
}
}
/// <summary>
/// Return the colour of the image or black if the index is out of bounds
/// </summary>
/// <param name="sampler">colour sampler</param>
/// <param name="row">x coordinate</param>
/// <param name="y">y coordinate</param>
/// <returns>colour from sampler or black</returns>
private Colour ColorOrDefault(IColourSampler sampler, int row, int column)
{
var size = sampler.GetSize();
if (row < 0 || row >= size.Height)
{
return(Colour.Black);
}
else if (column < 0 || column >= size.Width)
{
return(Colour.Black);
}
else
{
return(sampler.GetPixelColour(row, column));
}
}
/// <summary>
/// Convert an image to a Portal Pixel Map (PPM) file format
/// </summary>
/// <param name="writer">writer to write to</param>
/// <param name="sample">image to sample</param>
public void Serialize(TextWriter writer, IColourSampler sampler)
{
var size = sampler.GetSize();
//Head
writer.WriteLine("P3");
writer.WriteLine(size.Width + " " + size.Height);
writer.WriteLine(255);
//Body
for (int row = 0; row < size.Height; row++)
{
for (int column = 0; column < size.Width; column++)
{
Colour c = sampler.GetPixelColour(row, column);
writer.WriteLine(c.R + " " + c.G + " " + c.B);
}
}
}
