public static UILabel AddLabel(UIView view, string text, UIColor color, ResizeAlignment alignment, UIEdgeInsets margins)
{
var label = new UILabel {
Text = text,
TextColor = color
};
return(AddLabel(view, label, alignment, margins));
}
public static UIImage ResizeAndDispose(
this UIImage image,
CGSize requestedSize,
ResizeMethod resizeStrategy = ResizeMethod.Stretch,
ResizeAlignment resizeAlignment = ResizeAlignment.CenterCenter,
bool antiAliasing = true,
CGInterpolationQuality interpolationQuality = CGInterpolationQuality.High,
UIColor paddingColor = null)
{
return(Tools.iOSTool.ResizeAndDispose(image, requestedSize, resizeStrategy, resizeAlignment, antiAliasing, interpolationQuality, paddingColor));
}
public static Bitmap ResizeAndDispose(
this Image image,
Size requestedSize,
ResizeMethod resizeMethod = ResizeMethod.Stretch,
ResizeAlignment resizeAlignment = ResizeAlignment.CenterCenter,
InterpolationMode interpolationMode = InterpolationMode.HighQualityBicubic,
Color?paddingColor = null,
PixelFormat?newPixelFormat = null
)
{
using (var sourceImage = image) {
return(sourceImage.Resize(requestedSize, resizeMethod, resizeAlignment, interpolationMode,
paddingColor, newPixelFormat));
}
}
public static Bitmap FocusZoom(this Image image, float zoomFactor, int focusX, int focusY,
ResizeMethod resizeMethod = ResizeMethod.Stretch,
ResizeAlignment resizeAlignment = ResizeAlignment.CenterCenter,
InterpolationMode interpolationMode = InterpolationMode.HighQualityBicubic,
Color?paddingColor = null,
PixelFormat?newPixelFormat = null
)
{
if (Math.Abs(zoomFactor - 0.0f) < Tools.Maths.EPSILON_F)
{
throw new ArgumentOutOfRangeException("zoomFactor", string.Format("Must not be 0 (epsilon tested with {0})", Tools.Maths.EPSILON_F));
}
var actualPaddingColor = paddingColor.GetValueOrDefault(Color.Transparent);
var pixelFormat = newPixelFormat.GetValueOrDefault(image.PixelFormat);
var bitmap = new Bitmap(image.Width, image.Height, pixelFormat);
bitmap.SetResolution(image.HorizontalResolution, image.VerticalResolution);
using (Graphics graphics = Graphics.FromImage(bitmap)) {
graphics.Clear(actualPaddingColor);
graphics.InterpolationMode = interpolationMode;
var sourceHeight = image.Height / zoomFactor;
var sourceWidth = image.Width / zoomFactor;
var startX = focusX - sourceWidth / 2;
var startY = focusY - sourceHeight / 2;
var sourceRectangle = new Rectangle(
(int)Math.Round(startX),
(int)Math.Round(startY),
(int)Math.Round(sourceWidth),
(int)Math.Round(sourceHeight)
)
.IntersectWith(0, 0, image.Width, image.Height);
var destRectangle = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
graphics.DrawImage(image, sourceRectangle, destRectangle, GraphicsUnit.Pixel);
}
return(bitmap);
}
public static UIImage Resize(
UIImage sourceImage,
CGSize requestedSize,
ResizeMethod resizeMethod = ResizeMethod.Stretch,
ResizeAlignment resizeAlignment = ResizeAlignment.CenterCenter,
bool antiAliasing = true,
CGInterpolationQuality interpolationQuality = CGInterpolationQuality.High,
UIColor paddingColor = null)
{
if (paddingColor == null)
{
paddingColor = UIColor.Clear;
}
var sourceImageSize = (CGSize)sourceImage.Size;
var scaleWidth = ((float)requestedSize.Width / (float)sourceImageSize.Width);
var scaleHeight = ((float)requestedSize.Height / (float)sourceImageSize.Height);
CGSize destImageSize;
CGRect sourceBlitRect = CGRect.Empty;
CGRect destBlitRect = CGRect.Empty;
bool alignSourceBlitRect = false;
bool alignDestBlitRect = false;
switch (resizeMethod)
{
case ResizeMethod.AspectFit:
sourceBlitRect = new CGRect(CGPoint.Empty, sourceImageSize);
scaleWidth = Math.Min(scaleWidth, scaleHeight);
scaleHeight = Math.Min(scaleWidth, scaleHeight);
destBlitRect.Width = sourceImageSize.Width * scaleWidth;
destBlitRect.Height = sourceImageSize.Height * scaleHeight;
destImageSize = destBlitRect.Size;
break;
case ResizeMethod.AspectFitPadded:
sourceBlitRect = new CGRect(CGPoint.Empty, sourceImageSize);
scaleWidth = Math.Min(scaleWidth, scaleHeight);
scaleHeight = Math.Min(scaleWidth, scaleHeight);
destBlitRect.Width = sourceImageSize.Width * scaleWidth;
destBlitRect.Height = sourceImageSize.Height * scaleHeight;
destImageSize = requestedSize;
alignDestBlitRect = true;
break;
case ResizeMethod.AspectFill:
var sourceAspect = sourceImageSize.Width / sourceImageSize.Height;
var destAspect = requestedSize.Width / requestedSize.Height;
if (destAspect > sourceAspect)
{
sourceBlitRect = new CGRect(0, 0, sourceImageSize.Width, sourceImageSize.Width / destAspect);
alignSourceBlitRect = true;
}
else if (destAspect < sourceAspect)
{
sourceBlitRect = new CGRect(0, 0, sourceImageSize.Height * destAspect, sourceImageSize.Height);
alignSourceBlitRect = true;
}
else
{
sourceBlitRect = new CGRect(CGPoint.Empty, sourceImageSize);
}
destBlitRect = new CGRect(CGPoint.Empty, requestedSize);
destImageSize = requestedSize;
break;
case ResizeMethod.Stretch:
default:
sourceBlitRect = new CGRect(CGPoint.Empty, sourceImageSize);
destBlitRect.Width = sourceImageSize.Width * scaleWidth;
destBlitRect.Height = sourceImageSize.Height * scaleHeight;
destImageSize = requestedSize;
break;
}
if (alignDestBlitRect)
{
switch (resizeAlignment)
{
case ResizeAlignment.TopLeft:
destBlitRect.Offset(0, 0);
break;
case ResizeAlignment.TopCenter:
destBlitRect.Offset((destImageSize.Width - destBlitRect.Width) / 2, 0);
break;
case ResizeAlignment.TopRight:
destBlitRect.Offset(destImageSize.Width - destBlitRect.Width, 0);
break;
case ResizeAlignment.CenterLeft:
destBlitRect.Offset(0, (destImageSize.Height - destBlitRect.Height) / 2);
break;
case ResizeAlignment.CenterCenter:
destBlitRect.Offset((destImageSize.Width - destBlitRect.Width) / 2, (destImageSize.Height - destBlitRect.Height) / 2);
break;
case ResizeAlignment.CenterRight:
destBlitRect.Offset((destImageSize.Width - destBlitRect.Width), (destImageSize.Height - destBlitRect.Height) / 2);
break;
case ResizeAlignment.BottomLeft:
destBlitRect.Offset(0, (destImageSize.Height - destBlitRect.Height));
break;
case ResizeAlignment.BottomCenter:
destBlitRect.Offset((destImageSize.Width - destBlitRect.Width) / 2, destImageSize.Height - destBlitRect.Height);
break;
case ResizeAlignment.BottomRight:
destBlitRect.Offset(destImageSize.Width - destBlitRect.Width, destImageSize.Height - destBlitRect.Height);
break;
default:
break;
}
}
if (alignSourceBlitRect)
{
switch (resizeAlignment)
{
case ResizeAlignment.TopLeft:
sourceBlitRect.Offset(0, 0);
break;
case ResizeAlignment.TopCenter:
sourceBlitRect.Offset((sourceImageSize.Width - sourceBlitRect.Width) / 2, 0);
break;
case ResizeAlignment.TopRight:
sourceBlitRect.Offset(sourceImageSize.Width - sourceBlitRect.Width, 0);
break;
case ResizeAlignment.CenterLeft:
sourceBlitRect.Offset(0, (sourceImageSize.Height - sourceBlitRect.Height) / 2);
break;
case ResizeAlignment.CenterCenter:
sourceBlitRect.Offset((sourceImageSize.Width - sourceBlitRect.Width) / 2, (sourceImageSize.Height - sourceBlitRect.Height) / 2);
break;
case ResizeAlignment.CenterRight:
sourceBlitRect.Offset((sourceImageSize.Width - sourceBlitRect.Width), (sourceImageSize.Height - sourceBlitRect.Height) / 2);
break;
case ResizeAlignment.BottomLeft:
sourceBlitRect.Offset(0, sourceImageSize.Height - sourceBlitRect.Height);
break;
case ResizeAlignment.BottomCenter:
sourceBlitRect.Offset((sourceImageSize.Width - sourceBlitRect.Width) / 2, sourceImageSize.Height - sourceBlitRect.Height);
break;
case ResizeAlignment.BottomRight:
sourceBlitRect.Offset((sourceImageSize.Width - sourceBlitRect.Width), sourceImageSize.Height - sourceBlitRect.Height);
break;
default:
break;
}
}
var imageToUse = alignSourceBlitRect ? Crop(sourceImage, sourceBlitRect) : sourceImage;
UIGraphics.BeginImageContext(destImageSize);
var context = UIGraphics.GetCurrentContext();
//context.TranslateCTM(0, destImageSize.Height);
//context.ScaleCTM(1f, -1f);
context.InterpolationQuality = interpolationQuality;
context.SetAllowsAntialiasing(antiAliasing);
context.SetFillColor(paddingColor.CGColor);
context.FillRect(new CGRect(CGPoint.Empty, destImageSize));
//context.DrawImage(destBlitRect, imageToUse.CGImage);
imageToUse.Draw(destBlitRect);
UIImage resizedImage = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
if (imageToUse != sourceImage)
{
imageToUse.Dispose();
}
return(resizedImage);
}
public static UILabel AddLabel(UIView view, UILabel label, ResizeAlignment alignment, UIEdgeInsets margins)
{
label.SizeToFit();
label.TranslatesAutoresizingMaskIntoConstraints = false;
//label.AdjustsFontSizeToFitWidth = true;
view.AddSubview(label);
view.AddConstraints(new[] {
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.Left, NSLayoutRelation.Equal, view, NSLayoutAttribute.Left, 1f, margins.Left)),
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.Right, NSLayoutRelation.Equal, view, NSLayoutAttribute.Right, 1f, margins.Right)),
});
switch (alignment)
{
case ResizeAlignment.TopLeft:
view.AddConstraints(new[] {
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.Top, NSLayoutRelation.Equal, view, NSLayoutAttribute.Top, 1f, margins.Top)),
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, view, NSLayoutAttribute.Top, 1f, +label.Frame.Height + margins.Top)),
});
label.TextAlignment = UITextAlignment.Left;
break;
case ResizeAlignment.TopCenter:
view.AddConstraints(new[] {
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.Top, NSLayoutRelation.Equal, view, NSLayoutAttribute.Top, 1f, margins.Top)),
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, view, NSLayoutAttribute.Top, 1f, +label.Frame.Height + margins.Top)),
});
label.TextAlignment = UITextAlignment.Center;
break;
case ResizeAlignment.TopRight:
view.AddConstraints(new[] {
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.Top, NSLayoutRelation.Equal, view, NSLayoutAttribute.Top, 1f, margins.Top)),
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, view, NSLayoutAttribute.Top, 1f, +label.Frame.Height + margins.Top)),
});
label.TextAlignment = UITextAlignment.Right;
break;
case ResizeAlignment.CenterLeft:
view.AddConstraints(new[] {
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.CenterY, NSLayoutRelation.Equal, view, NSLayoutAttribute.CenterY, 1f, 0f)),
});
label.TextAlignment = UITextAlignment.Left;
break;
case ResizeAlignment.CenterCenter:
view.AddConstraints(new[] {
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.CenterY, NSLayoutRelation.Equal, view, NSLayoutAttribute.CenterY, 1f, 0f)),
});
label.TextAlignment = UITextAlignment.Center;
break;
case ResizeAlignment.CenterRight:
view.AddConstraints(new[] {
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.CenterY, NSLayoutRelation.Equal, view, NSLayoutAttribute.CenterY, 1f, 0f)),
});
label.TextAlignment = UITextAlignment.Right;
break;
case ResizeAlignment.BottomLeft:
view.AddConstraints(new[] {
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.Top, NSLayoutRelation.Equal, view, NSLayoutAttribute.Bottom, 1f, -(label.Frame.Height + margins.Bottom))),
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, view, NSLayoutAttribute.Bottom, 1f, margins.Bottom)),
});
label.TextAlignment = UITextAlignment.Left;
break;
case ResizeAlignment.BottomCenter:
view.AddConstraints(new[] {
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.Top, NSLayoutRelation.Equal, view, NSLayoutAttribute.Bottom, 1f, -(label.Frame.Height + margins.Bottom))),
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, view, NSLayoutAttribute.Bottom, 1f, margins.Bottom)),
});
label.TextAlignment = UITextAlignment.Left;
break;
case ResizeAlignment.BottomRight:
view.AddConstraints(new[] {
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.Top, NSLayoutRelation.Equal, view, NSLayoutAttribute.Bottom, 1f, -(label.Frame.Height + margins.Bottom))),
(NSLayoutConstraint)(NSLayoutConstraint.Create(label, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, view, NSLayoutAttribute.Bottom, 1f, margins.Bottom)),
});
label.TextAlignment = UITextAlignment.Left;
break;
}
return(label);
}
public static Bitmap Resize(
this Image image,
Size requestedSize,
ResizeMethod resizeMethod = ResizeMethod.Stretch,
ResizeAlignment resizeAlignment = ResizeAlignment.CenterCenter,
InterpolationMode interpolationMode = InterpolationMode.HighQualityBicubic,
Color?paddingColor = null,
PixelFormat?newPixelFormat = null
)
{
var actualPaddingColor = paddingColor.GetValueOrDefault(Color.Transparent);
var pixelFormat = newPixelFormat.GetValueOrDefault(image.PixelFormat);
var sourceImageSize = image.Size;
var scaleWidth = (requestedSize.Width / (float)sourceImageSize.Width);
var scaleHeight = (requestedSize.Height / (float)sourceImageSize.Height);
Size destImageSize;
var sourceBlitRect = Rectangle.Empty;
var destBlitRect = Rectangle.Empty;
var alignSourceBlitRect = false;
var alignDestBlitRect = false;
switch (resizeMethod)
{
case ResizeMethod.AspectFit:
sourceBlitRect = new Rectangle(Point.Empty, sourceImageSize);
scaleWidth = Math.Min(scaleWidth, scaleHeight);
scaleHeight = Math.Min(scaleWidth, scaleHeight);
destBlitRect.Width = (int)Math.Round(sourceImageSize.Width * scaleWidth, 0);
destBlitRect.Height = (int)Math.Round(sourceImageSize.Height * scaleHeight, 0);
destImageSize = destBlitRect.Size;
break;
case ResizeMethod.AspectFitPadded:
sourceBlitRect = new Rectangle(Point.Empty, sourceImageSize);
scaleWidth = Math.Min(scaleWidth, scaleHeight);
scaleHeight = Math.Min(scaleWidth, scaleHeight);
destBlitRect.Width = (int)Math.Round(sourceImageSize.Width * scaleWidth);
destBlitRect.Height = (int)Math.Round(sourceImageSize.Height * scaleHeight);
destImageSize = requestedSize;
alignDestBlitRect = true;
break;
case ResizeMethod.AspectFill:
var sourceAspect = sourceImageSize.Width / (float)sourceImageSize.Height;
var destAspect = requestedSize.Width / (float)requestedSize.Height;
if (destAspect > sourceAspect)
{
sourceBlitRect = new Rectangle(0, 0, sourceImageSize.Width, (int)Math.Round(sourceImageSize.Width / destAspect));
alignSourceBlitRect = true;
}
else if (destAspect < sourceAspect)
{
sourceBlitRect = new Rectangle(0, 0, (int)Math.Round(sourceImageSize.Height * destAspect), sourceImageSize.Height);
alignSourceBlitRect = true;
}
else
{
sourceBlitRect = new Rectangle(Point.Empty, sourceImageSize);
}
destBlitRect = new Rectangle(Point.Empty, requestedSize);
destImageSize = requestedSize;
break;
case ResizeMethod.Stretch:
default:
sourceBlitRect = new Rectangle(Point.Empty, sourceImageSize);
destBlitRect.Width = (int)Math.Round(sourceImageSize.Width * scaleWidth);
destBlitRect.Height = (int)Math.Round(sourceImageSize.Height * scaleHeight);
destImageSize = requestedSize;
break;
}
if (alignDestBlitRect)
{
switch (resizeAlignment)
{
case ResizeAlignment.TopLeft:
destBlitRect.Offset(0, 0);
break;
case ResizeAlignment.TopCenter:
destBlitRect.Offset((destImageSize.Width - destBlitRect.Width) / 2, 0);
break;
case ResizeAlignment.TopRight:
destBlitRect.Offset(destImageSize.Width - destBlitRect.Width, 0);
break;
case ResizeAlignment.CenterLeft:
destBlitRect.Offset(0, (destImageSize.Height - destBlitRect.Height) / 2);
break;
case ResizeAlignment.CenterCenter:
destBlitRect.Offset((destImageSize.Width - destBlitRect.Width) / 2, (destImageSize.Height - destBlitRect.Height) / 2);
break;
case ResizeAlignment.CenterRight:
destBlitRect.Offset((destImageSize.Width - destBlitRect.Width), (destImageSize.Height - destBlitRect.Height) / 2);
break;
case ResizeAlignment.BottomLeft:
destBlitRect.Offset(0, (destImageSize.Height - destBlitRect.Height));
break;
case ResizeAlignment.BottomCenter:
destBlitRect.Offset((destImageSize.Width - destBlitRect.Width) / 2, destImageSize.Height - destBlitRect.Height);
break;
case ResizeAlignment.BottomRight:
destBlitRect.Offset(destImageSize.Width - destBlitRect.Width, destImageSize.Height - destBlitRect.Height);
break;
default:
break;
}
}
if (alignSourceBlitRect)
{
switch (resizeAlignment)
{
case ResizeAlignment.TopLeft:
sourceBlitRect.Offset(0, 0);
break;
case ResizeAlignment.TopCenter:
sourceBlitRect.Offset((sourceImageSize.Width - sourceBlitRect.Width) / 2, 0);
break;
case ResizeAlignment.TopRight:
sourceBlitRect.Offset(sourceImageSize.Width - sourceBlitRect.Width, 0);
break;
case ResizeAlignment.CenterLeft:
sourceBlitRect.Offset(0, (sourceImageSize.Height - sourceBlitRect.Height) / 2);
break;
case ResizeAlignment.CenterCenter:
sourceBlitRect.Offset((sourceImageSize.Width - sourceBlitRect.Width) / 2, (sourceImageSize.Height - sourceBlitRect.Height) / 2);
break;
case ResizeAlignment.CenterRight:
sourceBlitRect.Offset((sourceImageSize.Width - sourceBlitRect.Width), (sourceImageSize.Height - sourceBlitRect.Height) / 2);
break;
case ResizeAlignment.BottomLeft:
sourceBlitRect.Offset(0, sourceImageSize.Height - sourceBlitRect.Height);
break;
case ResizeAlignment.BottomCenter:
sourceBlitRect.Offset((sourceImageSize.Width - sourceBlitRect.Width) / 2, sourceImageSize.Height - sourceBlitRect.Height);
break;
case ResizeAlignment.BottomRight:
sourceBlitRect.Offset((sourceImageSize.Width - sourceBlitRect.Width), sourceImageSize.Height - sourceBlitRect.Height);
break;
default:
break;
}
}
Bitmap bitmap;
if (destImageSize.Width != 0 && destImageSize.Height != 0)
{
bitmap = new Bitmap(destImageSize.Width, destImageSize.Height, pixelFormat);
bitmap.SetResolution(image.HorizontalResolution, image.VerticalResolution);
using (var graphics = Graphics.FromImage(bitmap)) {
graphics.Clear(actualPaddingColor);
graphics.InterpolationMode = interpolationMode;
graphics.DrawImage(
image,
destBlitRect,
sourceBlitRect,
GraphicsUnit.Pixel
);
}
}
else
{
bitmap = new Bitmap(1, 1);
}
return(bitmap);
}
