public static void ExportImage(MapData mapData, string filename)
{
long highestAltitude = mapData.Altitudes.Max();
byte[] pixelBuffer = new byte[mapData.Width*mapData.Height*3];
for (long i = 0; i < pixelBuffer.Length; i += 3)
{
long altitudeIdx = i/3;
double normalisedAltitude = Math.Min(Math.Max(mapData.Altitudes[altitudeIdx]/(double) highestAltitude, 0f), 1f);
var pixel = CalculateColour(normalisedAltitude);
pixelBuffer[i + 0] = pixel.B;
pixelBuffer[i + 1] = pixel.G;
pixelBuffer[i + 2] = pixel.R;
}
GCHandle pixelBufferHandle = GCHandle.Alloc(pixelBuffer, GCHandleType.Pinned);
using (
Image image = new Bitmap((int) mapData.Width, (int) mapData.Height, (int) (mapData.Width*3),
PixelFormat.Format24bppRgb, pixelBufferHandle.AddrOfPinnedObject()))
{
var imageName = filename + ".png";
image.Save(imageName);
}
pixelBufferHandle.Free();
}
public static bool TryParse(StreamReader streamReader, out MapData mapData)
{
try
{
mapData = Parse(streamReader);
return true;
}
catch (IOException e)
{
Console.WriteLine($"Error occurred reading file: '{e.Message}'");
}
catch (ParseException e)
{
Console.WriteLine($"Parse error: '{e.Message}'");
}
mapData = null;
return false;
}
public static bool TryParseFile(string filename, out MapData mapData)
{
try
{
using (var fileStream = File.OpenText(filename))
{
return MapReader.TryParse(fileStream, out mapData);
}
}
catch (IOException e)
{
Console.WriteLine($"Failed to open map file '{filename}': '{e.Message}");
}
mapData = null;
return false;
}