private UniImage RenderWithCrop(SKImage maskedImage, FixedCameraEnhancedData configuration)
{
var mask = GenerateHomographyMask(configuration, _width, _height);
SKImage maskedCroppedImage;
using (var tempSurface = SKSurface.Create(new SKImageInfo(_croppedSize.Width, _croppedSize.Height)))
{
//get the drawing canvas of the surface
var canvas = tempSurface.Canvas;
//set background color
canvas.Clear(SKColors.Transparent);
canvas.DrawImage(maskedImage, SKRect.Create(_minX.Value, _minY.Value, _croppedSize.Width, _croppedSize.Height), SKRect.Create(0, 0, _croppedSize.Width, _croppedSize.Height));
canvas.DrawImage(mask, 0, 0);
// return the surface as a manageable image
maskedCroppedImage = tempSurface.Snapshot();
}
//
var image = SKImageIntoUniImage(maskedCroppedImage);
maskedCroppedImage.Dispose();
return(image);
}
private SKPoint[][] GetPolygons(FixedCameraEnhancedData configuration, int sourceWidth, int sourceHeight)
{
var polygons = configuration.Layers.OfType <HyperTagFixedCameraEnhancedDataLayer>()
.SelectMany(x => x.Tags ?? new HyperTag[0])
.Select(x => ProcessHyperTag(x, sourceWidth, sourceHeight))
.Where(x => x != null)
.ToArray();
return(polygons);
}
private UniImage RenderWithNoCutoff(SKImage maskedImage, FixedCameraEnhancedData configuration)
{
var polygons = GetPolygons(configuration, _width, _height);
SKImage maskedCroppedImage;
using (var tempSurface = SKSurface.Create(new SKImageInfo(maskedImage.Width, maskedImage.Height)))
{
//get the drawing canvas of the surface
var canvas = tempSurface.Canvas;
//set background color
canvas.Clear(SKColors.Transparent);
canvas.DrawImage(maskedImage, 0, 0);
var fillPaint = new SKPaint
{
Style = SKPaintStyle.Stroke,
Color = SKColors.Red,
BlendMode = SKBlendMode.Src,
StrokeWidth = 3
};
using (fillPaint)
{
var path = new SKPath();
foreach (var points in polygons)
{
path.MoveTo(points.First());
for (var i = 1; i < points.Length; i++)
{
path.LineTo(points[i]);
}
path.LineTo(points[0]);
}
canvas.DrawPath(path, fillPaint);
}
// return the surface as a manageable image
maskedCroppedImage = tempSurface.Snapshot();
}
//
var image = SKImageIntoUniImage(maskedCroppedImage);
maskedCroppedImage.Dispose();
return(image);
}
private SKImage GenerateHomographyMask(FixedCameraEnhancedData configuration, int sourceWidth, int sourceHeight)
{
var polygons = GetPolygons(configuration, sourceWidth, sourceHeight);
using (var tempSurface = SKSurface.Create(new SKImageInfo(sourceWidth, sourceHeight)))
{
//get the drawing canvas of the surface
var canvas = tempSurface.Canvas;
canvas.Clear(SKColors.Black);
var fillPaint = new SKPaint
{
Style = SKPaintStyle.Fill,
Color = SKColors.Transparent,
BlendMode = SKBlendMode.Clear
};
using (fillPaint)
{
var path = new SKPath();
foreach (var points in polygons)
{
path.MoveTo(points.First());
for (var i = 1; i < points.Length; i++)
{
path.LineTo(points[i]);
}
}
canvas.DrawPath(path, fillPaint);
}
using (var image = tempSurface.Snapshot())
{
_croppedSize = new Size(_maxX.Value - _minX.Value, _maxY.Value - _minY.Value);
var croppingRectI = SKRectI.Create(_minX.Value, _minY.Value, _croppedSize.Width, _croppedSize.Height);
var mask = image.Subset(croppingRectI);
return(mask);
}
}
}
