private static Stream GenerateImage(Vision vision, string penColor, string fillColor, Stream fileStream)
{
var accentColor = ColorFromHex(vision.color.accentColor);
var borderColor = ContrastColor(accentColor);
var rectColor = new Color();
if (!string.IsNullOrEmpty(penColor))
{
borderColor = ColorFromHex(penColor);
}
if (!string.IsNullOrEmpty(fillColor))
{
rectColor = ColorFromHex(fillColor);
}
var image = Image.FromStream(fileStream);
using (var g = Graphics.FromImage(image))
{
foreach (var face in vision.faces)
{
var x = face.faceRectangle.left;
var y = face.faceRectangle.top;
var width = face.faceRectangle.width;
var height = face.faceRectangle.height;
if (!string.IsNullOrEmpty(penColor))
{
var rectangle = new Rectangle(x, y, width, height);
var pen = new Pen(borderColor, 2)
{
Alignment = PenAlignment.Outset
};
g.DrawRectangle(pen, rectangle);
}
if (!string.IsNullOrEmpty(fillColor))
{
var rectangleF = new RectangleF(x, y, width, height);
var customColor = Color.FromArgb(50, rectColor);
var shadowBrush = new SolidBrush(customColor);
g.FillRectangles(shadowBrush, new[] {rectangleF});
}
}
}
var stream = ToStream(image, ImageFormat.Jpeg);
return stream;
}
public async Task<Vision> PostFormData()
{
if (!Request.Content.IsMimeMultipartContent("form-data"))
{
var emptyVision = new Vision();
return emptyVision;
}
var provider = await Request.Content.ReadAsMultipartAsync(new InMemoryMultipartFormDataStreamProvider());
var files = provider.Files;
var file1 = files[0];
var fileStream = await file1.ReadAsStreamAsync();
var keys = Request.RequestUri.ParseQueryString();
var generateImage = true;//keys["generateimage"] == "1";
var penColor = "123123";//keys["pencolor"];
var fillColor = "231231";//keys["fillcolor"];
var extension = ExtractExtension(file1);
var contentType = file1.Headers.ContentType.ToString();
var imageName = string.Concat(Guid.NewGuid().ToString(), extension);
var imageNameWithRect = string.Concat(Guid.NewGuid().ToString(), "-rect", extension);
var blobUri = UploadToBlobStorage(fileStream, imageName, contentType);
var vision = await GetVisionFromImage(blobUri);
if (generateImage)
{
var stream = GenerateImage(vision, penColor, fillColor, fileStream);
vision.imageUrl = UploadToBlobStorage(stream, imageNameWithRect, contentType).ToString();
}
return vision;
}