/// <summary>
/// Read an image from a stream pointing to a .pfm file
/// </summary>
/// <param name="inputStream"> A stream pointing to a .pfm file.</param>
public void readPfm(Stream inputStream)
{
string magic = readLine(inputStream);
if (magic != "PF")
{
throw new InvalidPfmFileFormat("Invalid magic PFM line!");
}
string whLine = readLine(inputStream);
List <int> w_h = parseImageSize(whLine);
this = new HdrImage(w_h[0], w_h[1]);
string endianLine = readLine(inputStream);
bool lEnd = isLittleEndian(endianLine);
Color temp = new Color();
for (int i = 0; i < this.height; i++)
{
for (int j = 0; j < this.width; j++)
{
temp.r = readFloat(inputStream, lEnd);
temp.g = readFloat(inputStream, lEnd);
temp.b = readFloat(inputStream, lEnd);
pixel[pixelOffset(j, this.height - 1 - i)] = temp;
}
}
}
/// <summary>
/// Basic constructor for the class.
/// </summary>
/// <param name="i"><see cref="HdrImage"/> input parameter</param>
/// <param name="c"><see cref="Camera"/> input parameter</param>
public ImageTracer(HdrImage i, Camera c, int sps = 0)
{
this.image = i;
this.camera = c;
this.pcg = new PCG();
this.samplesPerSide = sps;
}
public static IPigment parsePigment(InputStream inputFile, Scene scene)
{
KeywordEnum key = inputFile.expectKeywords(new List <KeywordEnum>()
{
KeywordEnum.Uniform, KeywordEnum.Checkered, KeywordEnum.Image
});
inputFile.expectSymbol("(");
IPigment result;
if (key == KeywordEnum.Uniform)
{
Color color = parseColor(inputFile, scene);
result = new UniformPigment(color: color);
}
else if (key == KeywordEnum.Checkered)
{
Color col1 = parseColor(inputFile, scene);
inputFile.expectSymbol(",");
Color col2 = parseColor(inputFile, scene);
inputFile.expectSymbol(",");
// optional parameter?
int steps = (int)inputFile.expectNumber(scene);
result = new CheckeredPigment(col1, col2, steps);
}
else if (key == KeywordEnum.Image)
{
string fileName = inputFile.expectString();
using (Stream imageStream = File.OpenRead(fileName))
{
HdrImage img = new HdrImage(imageStream);
result = new ImagePigment(img);
}
}
else
{
throw new GrammarError(inputFile.location, "This line should be unreachable");
}
inputFile.expectSymbol(")");
return(result);
}
/// <summary>
/// It saves the image in .pfm format into a stream
/// </summary>
/// <param name="outputStream"> Output Stream (either Memory- or FileStream).</param>
public void savePfm(Stream outputStream)
{
var endiannessValue = BitConverter.IsLittleEndian ? "-1.0" : "1.0";
var header = Encoding.ASCII.GetBytes($"PF\n{this.width} {this.height}\n{endiannessValue}\n");
outputStream.Write(header);
var img = new HdrImage(7, 4);
for (int x = 0; x < this.height; x++)
{
for (int y = 0; y < this.width; y++)
{
// Bottom left to top right
Color col = this.getPixel(y, this.height - 1 - x);
_writeFloat(outputStream, col.r);
_writeFloat(outputStream, col.g);
_writeFloat(outputStream, col.b);
}
}
return;
}
public ImagePigment(HdrImage i)
{
this.image = i;
}
