/// <summary>
/// Takes a .vr.jpg file, extracts the individual eye images and recombine them into a full omni-stereo image.
/// </summary>
public static Bitmap CreateStereoEquirectangular(string filename, EyeImageGeometry geometry = EyeImageGeometry.OverUnder, bool fillPoles = true, int maxWidth = 0)
{
var xmpDirectories = VrJpegMetadataReader.ReadMetadata(filename);
GPanorama pano = new GPanorama(xmpDirectories.ToList());
Bitmap left = new Bitmap(filename);
Bitmap right = ExtractRightEye(pano);
if (right == null)
{
left.Dispose();
return(null);
}
Bitmap leftEquir = Equirectangularize(left, pano, fillPoles, maxWidth);
Bitmap rightEquir = Equirectangularize(right, pano, fillPoles, maxWidth);
Bitmap composite = ComposeEyes(leftEquir, rightEquir, geometry);
left.Dispose();
right.Dispose();
leftEquir.Dispose();
rightEquir.Dispose();
return(composite);
}
/// <summary>
/// Extracts the embedded image from the panorama and returns it as a Bitmap.
/// Note: the left eye can be extracted simply by loading the original file into a regular Bitmap.
/// </summary>
public static Bitmap ExtractRightEye(GPanorama pano)
{
if (pano.ImageData == null)
{
return(null);
}
Bitmap bmp = null;
using (var stream = new MemoryStream(pano.ImageData))
bmp = new Bitmap(stream);
return(bmp);
}
/// <summary>
/// Takes a single eye Bitmap and creates a fully spherical equirectangular image,
/// with the pano painted at the correct latitude-longitude.
/// Optionally fills in the poles.
/// </summary>
public static Bitmap Equirectangularize(Bitmap bitmap, GPanorama pano, bool fillPoles = true, int maxWidth = 0)
{
if (bitmap == null)
{
return(null);
}
Rectangle crop = new Rectangle(pano.PanoCroppedAreaLeftPixels, pano.PanoCroppedAreaTopPixels, pano.PanoCroppedAreaImageWidthPixels, pano.PanoCroppedAreaImageHeightPixels);
int imgWidth = pano.PanoFullPanoWidthPixels;
int imgHeight = pano.PanoFullPanoHeightPixels;
if (maxWidth > 0 && imgWidth > maxWidth)
{
float ratio = (float)maxWidth / imgWidth;
imgWidth = maxWidth;
imgHeight = imgWidth / 2;
// In case of subpixel coordinate, expand the rectangle.
crop = new Rectangle((int)Math.Floor(crop.Left * ratio), (int)Math.Floor(crop.Top * ratio), (int)Math.Ceiling(crop.Width * ratio), (int)Math.Ceiling(crop.Height * ratio));
}
Bitmap result = new Bitmap(imgWidth, imgHeight, bitmap.PixelFormat);
Graphics g = Graphics.FromImage(result);
g.DrawImage(bitmap, crop);
g.Dispose();
if (fillPoles)
{
PoleFiller.Fill(result, crop);
}
return(result);
}