/* Set the resolution of the HDR image */
public void SetResolution(int w, int h)
{
width = w;
height = h;
pixels = new HDRPixel[width * height];
for (int i = 0; i < pixels.Length; i++)
{
pixels[i] = new HDRPixel(0, 0, 0, 0);
}
}
/* Load in a HDR file */
public void Open(string filename, bool can_reparse_hdr = true, bool can_reparse_exr = true)
{
//Check sanity of input
if (!(Path.GetExtension(filename) == ".hdr" || Path.GetExtension(filename) == ".exr"))
{
throw new System.FormatException("Trying to load a non-HDR image!");
}
if (!File.Exists(filename))
{
throw new System.FormatException("Requested to open a file that doesn't exist!");
}
//If given an EXR, we need it in HDR format
if (Path.GetExtension(filename) == ".exr")
{
if (!can_reparse_exr)
{
throw new System.FormatException("Failed to load HDR, incorrect format!");
}
string HDRConverterPath = @"D:\Github Repos\CTP-2019-20\Libraries\EXR2HDR\";
File.Copy(filename, HDRConverterPath + "input.exr", true);
ProcessStartInfo processInfo = new ProcessStartInfo("cmd.exe", "/c \"" + HDRConverterPath + "run.bat\"");
processInfo.WorkingDirectory = HDRConverterPath;
processInfo.CreateNoWindow = true;
processInfo.UseShellExecute = false;
Process process = Process.Start(processInfo);
process.WaitForExit();
process.Close();
File.Delete(HDRConverterPath + "input.exr");
if (!File.Exists(HDRConverterPath + "output.hdr"))
{
throw new System.FormatException("Failed to convert EXR to correct format!");
}
Open(HDRConverterPath + "output.hdr", true, false);
File.Delete(HDRConverterPath + "output.hdr");
return;
}
BinaryReader InFile = new BinaryReader(File.OpenRead(filename));
//Read the header
string thisHeaderLine = "";
while (true)
{
byte thisByte = InFile.ReadByte();
if (thisByte == 0x0A)
{
if (thisHeaderLine.Length >= 6 && thisHeaderLine.Substring(0, 6).ToUpper() == "FORMAT")
{
if (thisHeaderLine.Substring(7) != "32-bit_rle_rgbe")
{
throw new System.FormatException("Can only read 32-bit RGBE HDR images!");
}
}
else if (thisHeaderLine.Length >= 2 && thisHeaderLine.Substring(0, 2).ToUpper() == "-Y")
{
string[] sizeData = thisHeaderLine.Split(' ');
int Y = Convert.ToInt32(sizeData[1]);
int X = Convert.ToInt32(sizeData[3]);
SetResolution(X, Y);
break; //Resolution should always be last param!
}
thisHeaderLine = "";
}
else
{
thisHeaderLine += (char)thisByte;
}
}
int headerLen = (int)InFile.BaseStream.Position;
//Some HDRs use scanline compression - convert it for us, and try again
if (InFile.BaseStream.Length < (width * height * 4))
{
if (!can_reparse_hdr)
{
throw new System.FormatException("Failed to load HDR, incorrect format!");
}
string HDRConverterPath = @"D:\Github Repos\CTP-2019-20\Libraries\HDRConverter\";
File.Copy(filename, HDRConverterPath + "input.hdr", true);
ProcessStartInfo processInfo = new ProcessStartInfo("cmd.exe", "/c \"" + HDRConverterPath + "run.bat\"");
processInfo.WorkingDirectory = HDRConverterPath;
processInfo.CreateNoWindow = true;
processInfo.UseShellExecute = false;
Process process = Process.Start(processInfo);
process.WaitForExit();
process.Close();
File.Delete(HDRConverterPath + "input.hdr");
if (!File.Exists(HDRConverterPath + "output.hdr"))
{
throw new System.FormatException("Failed to convert HDR to correct format!");
}
Open(HDRConverterPath + "output.hdr", false);
File.Delete(HDRConverterPath + "output.hdr");
InFile.Close();
return;
}
//Read RGBE data
for (int i = 0; i < (InFile.BaseStream.Length - headerLen) / 4; i++)
{
HDRPixel newPixel = new HDRPixel();
byte[] values = InFile.ReadBytes(4);
newPixel.R = (int)values[0];
newPixel.G = (int)values[1];
newPixel.B = (int)values[2];
newPixel.E = (int)values[3];
pixels[i] = newPixel;
}
InFile.Close();
}
/* Set a pixel by X,Y position */
public void SetPixel(int x, int y, HDRPixel p)
{
pixels[(y * Width) + x] = p;
}
