Пример #1
0
 public static CGColor ToCGColor(this UGColor color)
 {
     using (var colorSpace = CGColorSpace.CreateSrgb())
     {
         return(new CGColor(colorSpace, color.ToColorComponents()));
     }
 }
Пример #2
0
        public UGRadialGradientBrush(IUGContext context, Vector2 center, float radius, IEnumerable <UGGradientStop> gradientStops, UGEdgeBehavior edgeBehavior)
        {
            Center       = center;
            Radius       = radius;
            EdgeBehavior = edgeBehavior;
            Stops        = gradientStops.ToArray();

            if (Stops.Length < 2)
            {
                throw new ArgumentException(nameof(gradientStops));
            }

            unsafe
            {
                var baseFunction = CGFunctionsHelper.GetCGFunction(EdgeBehavior);
                CGFunction.CGFunctionEvaluate function = (data, outData) => baseFunction(Stops, data, outData);
                var domain = new nfloat[] { 0, edgeBehavior != UGEdgeBehavior.Clamp ? 1.5F : 1 };
                _function = new CGFunction(domain, new nfloat[] { 0, 1, 0, 1, 0, 1, 0, 1 }, function);
            }

            var cgCenter = Center.ToCGPoint();
            var cgRadius = EdgeBehavior != UGEdgeBehavior.Clamp ? 1.5F * Radius : Radius;

            using (var colorSpace = CGColorSpace.CreateSrgb())
            {
                _native = CGShading.CreateRadial(colorSpace, cgCenter, 0F, cgCenter, cgRadius, _function, true, true);
            }
        }
        public IUGContext CreateDrawingSession()
        {
            var bpp        = 8;
            var width      = (nint)(Scale * Width + .5F);
            var height     = (nint)(Scale * Height + .5F);
            var stride     = 4 * width;
            var canvasRect = new CGRect(0F, 0F, Width, Height);

            using (var colorSpace = CGColorSpace.CreateSrgb())
            {
                var context = new CGBitmapContext(null, width, height, bpp, stride, colorSpace, CGImageAlphaInfo.PremultipliedFirst);
                context.ScaleCTM(Scale, Scale);
                return(new UGContext(context, canvasRect, Scale, () =>
                {
                    _native = context.ToImage();
                    context.Dispose();
                    context = null;
                }));
            }
        }
        internal static bool SaveImageWithMetadataiOS13(UIImage image, float quality, NSDictionary meta, string path, string pathExtension)
        {
            try
            {
                pathExtension = pathExtension.ToLowerInvariant();
                var finalQuality = quality;
                var imageData    = pathExtension == "jpg" ? image.AsJPEG(finalQuality) : image.AsPNG();

                //continue to move down quality , rare instances
                while (imageData == null && finalQuality > 0)
                {
                    finalQuality -= 0.05f;
                    imageData     = image.AsJPEG(finalQuality);
                }

                if (imageData == null)
                {
                    throw new NullReferenceException("Unable to convert image to jpeg, please ensure file exists or lower quality level");
                }

                // Copy over meta data
                using var ciImage        = CIImage.FromData(imageData);
                using var newImageSource = ciImage.CreateBySettingProperties(meta);
                using var ciContext      = new CIContext();

                if (pathExtension == "jpg")
                {
                    return(ciContext.WriteJpegRepresentation(newImageSource, NSUrl.FromFilename(path), CGColorSpace.CreateSrgb(), new NSDictionary(), out var error));
                }

                return(ciContext.WritePngRepresentation(newImageSource, NSUrl.FromFilename(path), CIFormat.ARGB8, CGColorSpace.CreateSrgb(), new NSDictionary(), out var error2));
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Unable to save image with metadata: {ex}");
            }

            return(false);
        }
Пример #5
0
 public static CGColor ToCGColor(Xamarin.Forms.Color color)
 {
     return(new CGColor(CGColorSpace.CreateSrgb(), new nfloat[] { (float)color.R, (float)color.G, (float)color.B, (float)color.A }));
 }
 public static CGColor TosRGBCGColor(this Color color)
 {
     return(new CGColor(CGColorSpace.CreateSrgb(), new nfloat[] { (float)color.R, (float)color.G, (float)color.B, (float)color.A }));
 }
Пример #7
0
        static bool SaveImageWithMetadataiOS13(UIImage image, NSDictionary meta, string path, string fileExt)
        {
            try
            {
                var imageData = fileExt == "png" ? image.AsPNG() : image.AsJPEG();
                if (imageData == null)
                {
                    throw new NullReferenceException("Unable to convert image to jpeg, please ensure file exists or lower quality level");
                }

                // Copy over meta data
                using (var ciImage = CIImage.FromData(imageData))
                    using (var newImageSource = ciImage.CreateBySettingProperties(meta))
                        using (var ciContext = new CIContext())
                        {
                            if (fileExt == "png")
                            {
                                return(ciContext.WritePngRepresentation(newImageSource, NSUrl.FromFilename(path), CIFormat.ARGB8, CGColorSpace.CreateSrgb(), new NSDictionary(), out var error2));
                            }

                            return(ciContext.WriteJpegRepresentation(newImageSource, NSUrl.FromFilename(path), CGColorSpace.CreateSrgb(), new NSDictionary(), out var error));
                        }
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Unable to save image with metadata: {ex}");
            }
            return(false);
        }