private static List <int> GetDelays(CGImageSource source)
{
var retval = new List <int>();
for (int i = 0; i < source?.ImageCount; i++)
{
var delayCentiseconds = 1;
var properties = source.GetProperties(i, null);
using (var gifProperties = properties.Dictionary[CGImageProperties.GIFDictionary])
{
if (gifProperties != null)
{
using (var unclampedDelay = gifProperties.ValueForKey(CGImageProperties.GIFUnclampedDelayTime))
{
double delayAsDouble = unclampedDelay != null?double.Parse(unclampedDelay.ToString(), CultureInfo.InvariantCulture) : 0;
if (delayAsDouble == 0)
{
using (var delay = gifProperties.ValueForKey(CGImageProperties.GIFDelayTime))
delayAsDouble = delay != null?double.Parse(delay.ToString(), CultureInfo.InvariantCulture) : 0;
}
if (delayAsDouble > 0)
{
delayCentiseconds = (int)(delayAsDouble * 100);
}
}
}
}
retval.Add(delayCentiseconds);
}
return(retval);
}
static public FormsCAKeyFrameAnimation CreateAnimationFromCGImageSource(CGImageSource imageSource)
{
FormsCAKeyFrameAnimation animation = null;
float repeatCount = float.MaxValue;
var imageCount = imageSource.ImageCount;
if (imageCount <= 0)
{
return(null);
}
using (var imageData = new ImageDataHelper(imageCount))
{
if (imageSource.TypeIdentifier == "com.compuserve.gif")
{
var imageProperties = imageSource.GetProperties(null);
using (var gifImageProperties = imageProperties?.Dictionary[ImageIO.CGImageProperties.GIFDictionary])
using (var repeatCountValue = gifImageProperties?.ValueForKey(ImageIO.CGImageProperties.GIFLoopCount))
{
if (repeatCountValue != null)
{
float.TryParse(repeatCountValue.ToString(), out repeatCount);
}
else
{
repeatCount = 1;
}
if (repeatCount == 0)
{
repeatCount = float.MaxValue;
}
}
}
for (int i = 0; i < imageCount; i++)
{
imageData.AddFrameData(i, imageSource);
}
animation = imageData.CreateKeyFrameAnimation();
if (animation != null)
{
animation.RemovedOnCompletion = false;
animation.KeyPath = "contents";
animation.RepeatCount = repeatCount;
animation.Width = imageData.Width;
animation.Height = imageData.Height;
if (imageCount == 1)
{
animation.Duration = double.MaxValue;
animation.KeyTimes = null;
}
}
}
return(animation);
}
private static int GetLoopCount(CGImageSource source)
{
var var = source.GetProperties(null);
using (var gifProperties = var.Dictionary["{GIF}"])
{
var loopCount = gifProperties.ValueForKey(new NSString("LoopCount"));
return(int.Parse(loopCount.ToString()));
}
}
public void AddFrameData(int index, CGImageSource imageSource)
{
if (index < 0 || index >= _imageCount || index >= imageSource.ImageCount)
{
throw new ArgumentException();
}
double delayTime = 0.1f;
var imageProperties = imageSource.GetProperties(index, null);
using (var gifImageProperties = imageProperties?.Dictionary[ImageIO.CGImageProperties.GIFDictionary])
using (var unclampedDelayTimeValue = gifImageProperties?.ValueForKey(ImageIO.CGImageProperties.GIFUnclampedDelayTime))
using (var delayTimeValue = gifImageProperties?.ValueForKey(ImageIO.CGImageProperties.GIFDelayTime))
{
if (unclampedDelayTimeValue != null)
{
double.TryParse(unclampedDelayTimeValue.ToString(), out delayTime);
}
else if (delayTimeValue != null)
{
double.TryParse(delayTimeValue.ToString(), out delayTime);
}
// Frame delay compability adjustment.
if (delayTime <= 0.02f)
{
delayTime = 0.1f;
}
using (var image = imageSource.CreateImage(index, null))
{
if (image != null)
{
Width = Math.Max(Width, (int)image.Width);
Height = Math.Max(Height, (int)image.Height);
_keyFrames[index]?.Dispose();
_keyFrames[index] = null;
_keyFrames[index] = NSObject.FromObject(image);
_delayTimes[index] = delayTime;
_totalAnimationTime += delayTime;
}
}
}
}
private static CoreGraphics.CGImageProperties GetImageProperties(CGImageSource imageSource)
{
if (imageSource == null)
{
return(null);
}
try
{
// Get original image size
return(imageSource.GetProperties(0));
}
catch (ArgumentNullException ex)
{
ImageService.Instance.Config.Logger.Debug(ex.ToString());
return(null);
}
}
private static List <double> GetDelays(CGImageSource source)
{
var retval = new List <double>();
for (int i = 0; i < source?.ImageCount; i++)
{
var properties = source.GetProperties(i, null);
using (var gifProperties = properties.Dictionary["{GIF}"])
{
using (var delayTime = gifProperties.ValueForKey(new NSString("DelayTime")))
{
var realDuration = double.Parse(delayTime.ToString());
retval.Add(realDuration);
}
}
}
return(retval);
}
private void SetImageInformation(int frame)
{
frameCount = (int)imageSource.ImageCount;
if (frameCount == 0)
{
throw new ArgumentException("Invalid image");
}
var properties = imageSource.GetProperties(frame, null);
// This needs to be incorporated in frame information later
// as well as during the clone methods.
dpiWidth = properties.DPIWidthF != null ? (float)properties.DPIWidthF : ConversionHelpers.MS_DPI;
dpiHeight = properties.DPIWidthF != null ? (float)properties.DPIHeightF : ConversionHelpers.MS_DPI;
physicalDimension.Width = (float)properties.PixelWidth;
physicalDimension.Height = (float)properties.PixelHeight;
// The physical size may be off on certain implementations. For instance the dpiWidth and dpiHeight
// are read using integers in core graphics but in windows it is a float.
// For example:
// coregraphics dpiWidth = 24 as integer
// windows dpiWidth = 24.999935 as float
// this gives a few pixels difference when calculating the physical size.
// 256 * 96 / 24 = 1024
// 256 * 96 / 24.999935 = 983.04
//
// https://bugzilla.xamarin.com/show_bug.cgi?id=14365
// PR: https://github.com/mono/maccore/pull/57
//
physicalSize = new SizeF(physicalDimension.Width, physicalDimension.Height);
physicalSize.Width *= ConversionHelpers.MS_DPI / dpiWidth;
physicalSize.Height *= ConversionHelpers.MS_DPI / dpiHeight;
// Set the raw image format
// We will use the UTI from the image source
rawFormat = ImageFormatFromUTI(imageSource.TypeIdentifier);
}
private static UIImageView CreateAnimatedImageView(CGImageSource imageSource, UIImageView imageView = null)
{
var frameCount = imageSource.ImageCount;
var frameImages = new List <NSObject>((int)frameCount);
var frameCGImages = new List <CGImage>((int)frameCount);
var frameDurations = new List <double>((int)frameCount);
var totalFrameDuration = 0.0;
for (int i = 0; i < frameCount; i++)
{
var frameImage = imageSource.CreateImage(i, null);
frameCGImages.Add(frameImage);
frameImages.Add(NSObject.FromObject(frameImage));
var properties = imageSource.GetProperties(i, null);
var duration = properties.Dictionary["{GIF}"];
var delayTime = duration.ValueForKey(new NSString("DelayTime"));
duration.Dispose();
var realDuration = double.Parse(delayTime.ToString());
frameDurations.Add(realDuration);
totalFrameDuration += realDuration;
frameImage.Dispose();
}
var framePercentageDurations = new List <NSNumber>((int)frameCount);
var framePercentageDurationsDouble = new List <double>((int)frameCount);
NSNumber currentDurationPercentage = 0.0f;
double currentDurationDouble = 0.0f;
for (int i = 0; i < frameCount; i++)
{
if (i != 0)
{
var previousDuration = frameDurations[i - 1];
var previousDurationPercentage = framePercentageDurationsDouble[i - 1];
var number = previousDurationPercentage + (previousDuration / totalFrameDuration);
currentDurationDouble = number;
currentDurationPercentage = new NSNumber(number);
}
framePercentageDurationsDouble.Add(currentDurationDouble);
framePercentageDurations.Add(currentDurationPercentage);
}
var imageSourceProperties = imageSource.GetProperties(null);
var imageSourceGIFProperties = imageSourceProperties.Dictionary["{GIF}"];
var loopCount = imageSourceGIFProperties.ValueForKey(new NSString("LoopCount"));
var imageSourceLoopCount = float.Parse(loopCount.ToString());
var frameAnimation = new CAKeyFrameAnimation();
frameAnimation.KeyPath = "contents";
if (imageSourceLoopCount <= 0.0f)
{
frameAnimation.RepeatCount = float.MaxValue;
}
else
{
frameAnimation.RepeatCount = imageSourceLoopCount;
}
imageSourceGIFProperties.Dispose();
frameAnimation.CalculationMode = CAAnimation.AnimationDescrete;
frameAnimation.Values = frameImages.ToArray();
frameAnimation.Duration = totalFrameDuration;
frameAnimation.KeyTimes = framePercentageDurations.ToArray();
frameAnimation.RemovedOnCompletion = false;
var firstFrame = frameCGImages[0];
if (imageView == null)
{
imageView = new UIImageView(new CGRect(0.0f, 0.0f, firstFrame.Width, firstFrame.Height));
}
else
{
imageView.Layer.RemoveAllAnimations();
}
imageView.Layer.AddAnimation(frameAnimation, "contents");
frameAnimation.Dispose();
return(imageView);
}
private static UIImageView CreateAnimatedImageView(CGImageSource imageSource, UIImageView imageView = null)
{
var frameCount = imageSource.ImageCount;
var frameImages = new List<NSObject>((int)frameCount);
var frameCGImages = new List<CGImage>((int)frameCount);
var frameDurations = new List<double>((int)frameCount);
var totalFrameDuration = 0.0;
for (int i = 0; i < frameCount; i++)
{
var frameImage = imageSource.CreateImage(i, null);
frameCGImages.Add(frameImage);
frameImages.Add(NSObject.FromObject(frameImage));
var properties = imageSource.GetProperties(i, null);
var duration = properties.Dictionary["{GIF}"];
var delayTime = duration.ValueForKey(new NSString("DelayTime"));
duration.Dispose ();
var realDuration = double.Parse(delayTime.ToString());
frameDurations.Add(realDuration);
totalFrameDuration += realDuration;
frameImage.Dispose ();
}
var framePercentageDurations = new List<NSNumber>((int)frameCount);
var framePercentageDurationsDouble = new List<double>((int)frameCount);
NSNumber currentDurationPercentage = 0.0f;
double currentDurationDouble = 0.0f;
for (int i = 0; i < frameCount; i++)
{
if (i != 0)
{
var previousDuration = frameDurations[i - 1];
var previousDurationPercentage = framePercentageDurationsDouble[i - 1];
var number = previousDurationPercentage + (previousDuration/totalFrameDuration);
currentDurationDouble = number;
currentDurationPercentage = new NSNumber(number);
}
framePercentageDurationsDouble.Add(currentDurationDouble);
framePercentageDurations.Add(currentDurationPercentage);
}
var imageSourceProperties = imageSource.GetProperties(null);
var imageSourceGIFProperties = imageSourceProperties.Dictionary["{GIF}"];
var loopCount = imageSourceGIFProperties.ValueForKey(new NSString("LoopCount"));
var imageSourceLoopCount = float.Parse(loopCount.ToString());
var frameAnimation = new CAKeyFrameAnimation();
frameAnimation.KeyPath = "contents";
if (imageSourceLoopCount <= 0.0f)
{
frameAnimation.RepeatCount = float.MaxValue;
}
else
{
frameAnimation.RepeatCount = imageSourceLoopCount;
}
imageSourceGIFProperties.Dispose ();
frameAnimation.CalculationMode = CAAnimation.AnimationDescrete;
frameAnimation.Values = frameImages.ToArray();
frameAnimation.Duration = totalFrameDuration;
frameAnimation.KeyTimes = framePercentageDurations.ToArray();
frameAnimation.RemovedOnCompletion = false;
var firstFrame = frameCGImages[0];
if(imageView == null)
imageView = new UIImageView(new CGRect(0.0f, 0.0f, firstFrame.Width, firstFrame.Height));
else
imageView.Layer.RemoveAllAnimations();
imageView.Layer.AddAnimation(frameAnimation, "contents");
frameAnimation.Dispose ();
return imageView;
}