public override Size MeasureText(Font font, string text)
{
CTFont sysFont = font.RendererData as CTFont;
if (sysFont == null || Math.Abs(font.RealSize - font.Size * Scale) > 2)
{
FreeFont(font);
LoadFont(font);
sysFont = font.RendererData as CTFont;
}
var key = new Tuple <String, Font>(text, font);
if (m_StringCache.ContainsKey(key))
{
var tex = m_StringCache[key].Texture;
return(new Size(tex.Width, tex.Height));
}
text = text.Replace("\t", " ");
var attributedString = new NSAttributedString(text, new CTStringAttributes()
{
Font = sysFont, UnderlineStyle = font.Underline ? CTUnderlineStyle.Single : CTUnderlineStyle.None
});
CTLine ctLine = new CTLine(attributedString);
CGRect cgRect = ctLine.GetBounds(CTLineBoundsOptions.IncludeLanguageExtents | CTLineBoundsOptions.UseHangingPunctuation);
ctLine.Dispose();
attributedString.Dispose();
return(new Size(Util.Ceil((float)cgRect.Width), Util.Ceil((float)cgRect.Height)));
}
public void OnDetached()
{
_nativeTextView.LayoutManager.Delegate = null;
_nativeTextView.AttributedText = _orgString;
_nativeTextView.Text = _formsEditor.Text;
_orgString?.Dispose();
_orgString = null;
_nativeTextView = null;
_formsEditor = null;
}
public override void RenderText(Font font, Point position, string text)
{
Flush();
CTFont sysFont = font.RendererData as CTFont;
if (sysFont == null || Math.Abs(font.RealSize - font.Size * Scale) > 2)
{
FreeFont(font);
LoadFont(font);
sysFont = font.RendererData as CTFont;
}
var key = new Tuple <String, Font>(text, font);
if (!m_StringCache.ContainsKey(key))
{
// not cached - create text renderer
text = text.Replace("\t", " ");
var attributedString = new NSAttributedString(text, new CTStringAttributes()
{
ForegroundColorFromContext = true, Font = sysFont, UnderlineStyle = font.Underline ? CTUnderlineStyle.Single : CTUnderlineStyle.None
});
CTLine ctLine = new CTLine(attributedString);
CGRect cgRect = ctLine.GetBounds(CTLineBoundsOptions.IncludeLanguageExtents | CTLineBoundsOptions.UseHangingPunctuation);
TextRenderer tr = new TextRenderer(Util.Ceil((float)cgRect.Width), Util.Ceil((float)cgRect.Height), this);
tr.DrawString(ctLine, new Point(0, (int)sysFont.DescentMetric)); // renders string on the texture
ctLine.Dispose();
attributedString.Dispose();
DrawTexturedRect(tr.Texture, new Rectangle(position.X, position.Y, tr.Texture.Width, tr.Texture.Height));
m_StringCache[key] = tr;
}
else
{
TextRenderer tr = m_StringCache[key];
DrawTexturedRect(tr.Texture, new Rectangle(position.X, position.Y, tr.Texture.Width, tr.Texture.Height));
}
}
public void DrawText(string text, float x, float y, float width, float height, Xamarin.Forms.TextAlignment hAlignment, Xamarin.Forms.TextAlignment vAlignment)
{
if (font == null || font.NativeFont == null)
{
return;
}
var attributedString = new NSAttributedString(text, new CTStringAttributes()
{
Font = font.NativeFont, ForegroundColorFromContext = true
});
CTLine ctLine = new CTLine(attributedString);
CGSize size = new CGSize((float)ctLine.GetTypographicBounds(), font.NativeFont.CapHeightMetric + font.NativeFont.DescentMetric);
if ((hAlignment & Xamarin.Forms.TextAlignment.Center) != 0)
{
x += (width - (float)size.Width) / 2;
}
else if ((hAlignment & Xamarin.Forms.TextAlignment.End) != 0)
{
x += width - (float)size.Width;
}
if ((vAlignment & Xamarin.Forms.TextAlignment.Center) != 0)
{
y += (height - (float)size.Height) / 2;
}
else if ((vAlignment & Xamarin.Forms.TextAlignment.End) != 0)
{
y += height - (float)size.Height;
}
context.SaveState();
context.ScaleCTM(1f, -1f);
context.TextPosition = new CGPoint(x, -y - font.NativeFont.CapHeightMetric);
ctLine.Draw(context);
context.RestoreState();
ctLine.Dispose();
attributedString.Dispose();
}
public Xamarin.Forms.Size MeasureText(string text)
{
if (font == null || font.NativeFont == null)
{
return(Xamarin.Forms.Size.Zero);
}
var attributedString = new NSAttributedString(text, new CTStringAttributes()
{
Font = font.NativeFont, ForegroundColorFromContext = true
});
CTLine ctLine = new CTLine(attributedString);
Xamarin.Forms.Size size = new Xamarin.Forms.Size((float)ctLine.GetTypographicBounds(), font.NativeFont.CapHeightMetric + font.NativeFont.DescentMetric);
ctLine.Dispose();
attributedString.Dispose();
return(size);
}
public void DrawText(string text, float x, float y)
{
if (font == null || font.NativeFont == null)
{
return;
}
var attributedString = new NSAttributedString(text, new CTStringAttributes()
{
Font = font.NativeFont, ForegroundColorFromContext = true
});
CTLine ctLine = new CTLine(attributedString);
context.SaveState();
context.ScaleCTM(1f, -1f);
context.TextPosition = new CGPoint(x, -y - font.NativeFont.CapHeightMetric);
ctLine.Draw(context);
context.RestoreState();
ctLine.Dispose();
attributedString.Dispose();
}
internal CCTexture2D CreateTextSprite(string text, CCFontDefinition textDefinition)
{
if (string.IsNullOrEmpty(text))
{
return(new CCTexture2D());
}
int imageWidth;
int imageHeight;
var textDef = textDefinition;
var contentScaleFactorWidth = CCLabel.DefaultTexelToContentSizeRatios.Width;
var contentScaleFactorHeight = CCLabel.DefaultTexelToContentSizeRatios.Height;
textDef.FontSize *= contentScaleFactorWidth;
textDef.Dimensions.Width *= contentScaleFactorWidth;
textDef.Dimensions.Height *= contentScaleFactorHeight;
bool hasPremultipliedAlpha;
// font
UIFont font = null;
var ext = System.IO.Path.GetExtension(textDef.FontName);
if (!String.IsNullOrEmpty(ext) && ext.ToLower() == ".ttf")
{
try
{
textDef.FontName = LoadFontFile(textDef.FontName);
font = UIFont.FromName(textDef.FontName, textDef.FontSize);
}
catch (Exception exc)
{
CCLog.Log(".ttf {0} file not found or can not be loaded.", textDef.FontName);
}
}
else
{
// font
font = UIFont.FromName(textDef.FontName, textDef.FontSize);
//NSFontManager.SharedFontManager.FontWithFamily(textDef.FontName, NSFontTraitMask.Unbold | NSFontTraitMask.Unitalic, 0, textDef.FontSize);
}
if (font == null)
{
font = UIFont.FromName("Arial", textDef.FontSize);
CCLog.Log("{0} not found. Defaulting to Arial.", textDef.FontName);
}
// color
var foregroundColor = UIColor.White;
// alignment
var horizontalAlignment = textDef.Alignment;
var verticleAlignement = textDef.LineAlignment;
var textAlign = (CCTextAlignment.Right == horizontalAlignment) ? UITextAlignment.Right
: (CCTextAlignment.Center == horizontalAlignment) ? UITextAlignment.Center
: UITextAlignment.Left;
// LineBreak
var lineBreak = (CCLabelLineBreak.Character == textDef.LineBreak) ? UILineBreakMode.CharacterWrap
: (CCLabelLineBreak.Word == textDef.LineBreak) ? UILineBreakMode.WordWrap
: UILineBreakMode.Clip;
var nsparagraphStyle = (NSMutableParagraphStyle)NSParagraphStyle.Default.MutableCopy();
nsparagraphStyle.LineBreakMode = lineBreak;
nsparagraphStyle.Alignment = textAlign;
// Create a new attributed string definition
var nsAttributes = new UIStringAttributes();
// Font attribute
nsAttributes.Font = font;
nsAttributes.ForegroundColor = foregroundColor;
nsAttributes.ParagraphStyle = nsparagraphStyle;
var stringWithAttributes = new NSAttributedString(text, nsAttributes);
var realDimensions = stringWithAttributes.Size;
// Mac crashes if the width or height is 0
if (realDimensions == SizeF.Empty)
{
throw new ArgumentOutOfRangeException("Native string:", "Dimensions of native NSAttributedString can not be 0,0");
}
var dimensions = new CGSize(textDef.Dimensions.Width, textDef.Dimensions.Height);
var layoutAvailable = true;
if (dimensions.Width <= 0)
{
dimensions.Width = 8388608;
layoutAvailable = false;
}
if (dimensions.Height <= 0)
{
dimensions.Height = 8388608;
layoutAvailable = false;
}
var boundingRect = stringWithAttributes.GetBoundingRect(new CGSize((int)dimensions.Width, (int)dimensions.Height),
NSStringDrawingOptions.UsesLineFragmentOrigin, null);
if (!layoutAvailable)
{
if (dimensions.Width == 8388608)
{
dimensions.Width = boundingRect.Width;
}
if (dimensions.Height == 8388608)
{
dimensions.Height = boundingRect.Height;
}
}
imageWidth = (int)dimensions.Width;
imageHeight = (int)dimensions.Height;
// Alignment
var xOffset = (nfloat)0.0f;
switch (textAlign)
{
case UITextAlignment.Left:
xOffset = 0;
break;
case UITextAlignment.Center:
xOffset = (dimensions.Width - boundingRect.Width) / 2.0f;
break;
case UITextAlignment.Right: xOffset = dimensions.Width - boundingRect.Width; break;
default: break;
}
// Line alignment
var yOffset = (CCVerticalTextAlignment.Bottom == verticleAlignement ||
boundingRect.Height >= dimensions.Height) ? (dimensions.Height - boundingRect.Height) // align to bottom
: (CCVerticalTextAlignment.Top == verticleAlignement) ? 0 // align to top
: (imageHeight - boundingRect.Height) / 2.0f; // align to center
//Find the rect that the string will draw into inside the dimensions
var drawRect = new CGRect(xOffset
, yOffset
, boundingRect.Width
, boundingRect.Height);
UIImage image = null;
CGContext context = null;
try
{
UIGraphics.BeginImageContext(new CGSize(imageWidth, imageHeight));
context = UIGraphics.GetCurrentContext();
//Set antialias or not
context.SetShouldAntialias(textDef.isShouldAntialias);
stringWithAttributes.DrawString(drawRect);
image = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
// We will use Texture2D from stream here instead of CCTexture2D stream.
var tex = Texture2D.FromStream(CCDrawManager.SharedDrawManager.XnaGraphicsDevice, image);
// Debugging purposes
// var path = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
// var fileName = Path.Combine(path, "Label3.png");
// using (var stream = new FileStream(fileName, FileMode.Create, FileAccess.Write))
// {
// tex.SaveAsPng(stream, imageWidth, imageHeight);
// }
// Create our texture of the label string.
var texture = new CCTexture2D(tex);
return(texture);
}
catch (Exception exc)
{
CCLog.Log("CCLabel: Error creating native label:{0}\n{1}", exc.Message, exc.StackTrace);
}
finally
{
// clean up the resources
if (image != null)
{
image.Dispose();
image = null;
}
if (context != null)
{
context.Dispose();
context = null;
}
if (stringWithAttributes != null)
{
stringWithAttributes.Dispose();
stringWithAttributes = null;
}
}
return(new CCTexture2D());
}
internal CCTexture2D CreateTextSprite(string text, CCFontDefinition textDefinition)
{
if (string.IsNullOrEmpty(text))
{
return(new CCTexture2D());
}
int imageWidth;
int imageHeight;
var textDef = textDefinition;
var contentScaleFactorWidth = CCLabel.DefaultTexelToContentSizeRatios.Width;
var contentScaleFactorHeight = CCLabel.DefaultTexelToContentSizeRatios.Height;
textDef.FontSize *= contentScaleFactorWidth;
textDef.Dimensions.Width *= contentScaleFactorWidth;
textDef.Dimensions.Height *= contentScaleFactorHeight;
//bool hasPremultipliedAlpha;
// font
NSFont font = null;
var ext = System.IO.Path.GetExtension(textDef.FontName);
if (!String.IsNullOrEmpty(ext) && ext.ToLower() == ".ttf")
{
try
{
textDef.FontName = LoadFontFile(textDef.FontName);
font = NSFont.FromFontName(textDef.FontName, textDef.FontSize);
}
catch
{
CCLog.Log(".ttf {0} file not found or can not be loaded.", textDef.FontName);
}
}
else
{
// font
font = NSFontManager.SharedFontManager.FontWithFamily(textDef.FontName, NSFontTraitMask.Unbold | NSFontTraitMask.Unitalic, 0, textDef.FontSize);
}
if (font == null)
{
font = NSFontManager.SharedFontManager.FontWithFamily("Arial", NSFontTraitMask.Unbold | NSFontTraitMask.Unitalic, 0, textDef.FontSize);
CCLog.Log("{0} not found. Defaulting to Arial.", textDef.FontName);
}
// color
var foregroundColor = NSColor.White;
// alignment
var horizontalAlignment = textDef.Alignment;
var verticleAlignement = textDef.LineAlignment;
var textAlign = (CCTextAlignment.Right == horizontalAlignment) ? NSTextAlignment.Right
: (CCTextAlignment.Center == horizontalAlignment) ? NSTextAlignment.Center
: NSTextAlignment.Left;
// LineBreak
var lineBreak = (CCLabelLineBreak.Character == textDef.LineBreak) ? NSLineBreakMode.CharWrapping
: (CCLabelLineBreak.Word == textDef.LineBreak) ? NSLineBreakMode.ByWordWrapping
: NSLineBreakMode.Clipping;
var nsparagraphStyle = new NSMutableParagraphStyle();
nsparagraphStyle.SetParagraphStyle(NSMutableParagraphStyle.DefaultParagraphStyle);
nsparagraphStyle.LineBreakMode = lineBreak;
nsparagraphStyle.Alignment = textAlign;
// Create a new attributed string definition
var nsAttributes = new NSStringAttributes();
// Font attribute
nsAttributes.Font = font;
nsAttributes.ForegroundColor = foregroundColor;
nsAttributes.ParagraphStyle = nsparagraphStyle;
var stringWithAttributes = new NSAttributedString(text, nsAttributes);
var realDimensions = stringWithAttributes.Size;
// Mac crashes if the width or height is 0
if (realDimensions == SizeF.Empty)
{
CCLog.Log("Native string:", "Dimensions of native NSAttributedString can not be 0,0");
return(new CCTexture2D());
}
var dimensions = new SizeF(textDef.Dimensions.Width, textDef.Dimensions.Height);
var layoutAvailable = true;
//
// * Note * This seems to only effect Mac because iOS works fine without this work around.
// Right Alignment BoundingRectWithSize does not seem to be working correctly when the following conditions are set:
// 1) Alignment Right
// 2) No dimensions
// 3) There are new line characters embedded in the string.
//
// So we set alignment to Left, calculate our bounds and then restore alignement afterwards before drawing.
//
if (dimensions.Width <= 0)
{
dimensions.Width = 8388608;
layoutAvailable = false;
// Set our alignment variables to left - see notes above.
nsparagraphStyle.Alignment = NSTextAlignment.Left;
stringWithAttributes.Dispose();
stringWithAttributes = null;
stringWithAttributes = new NSAttributedString(text, nsAttributes);
}
if (dimensions.Height <= 0)
{
dimensions.Height = 8388608;
layoutAvailable = false;
}
// Calculate our bounding rectangle
var boundingRect = stringWithAttributes.BoundingRectWithSize(new SizeF((int)dimensions.Width, (int)dimensions.Height),
NSStringDrawingOptions.UsesLineFragmentOrigin);
if (!layoutAvailable)
{
if (dimensions.Width == 8388608)
{
dimensions.Width = boundingRect.Width;
// Restore our alignment before drawing - see notes above.
nsparagraphStyle.Alignment = textAlign;
stringWithAttributes.Dispose();
stringWithAttributes = null;
stringWithAttributes = new NSAttributedString(text, nsAttributes);
}
if (dimensions.Height == 8388608)
{
dimensions.Height = boundingRect.Height;
}
}
imageWidth = (int)dimensions.Width;
imageHeight = (int)dimensions.Height;
// Alignment
var xOffset = 0.0f;
switch (textAlign)
{
case NSTextAlignment.Left:
xOffset = 0;
break;
case NSTextAlignment.Center:
xOffset = (dimensions.Width - boundingRect.Width) / 2.0f;
break;
case NSTextAlignment.Right: xOffset = dimensions.Width - boundingRect.Width; break;
default: break;
}
// Line alignment
var yOffset = (CCVerticalTextAlignment.Top == verticleAlignement ||
boundingRect.Height >= dimensions.Height) ? (dimensions.Height - boundingRect.Height) // align to top
: (CCVerticalTextAlignment.Bottom == verticleAlignement) ? 0 // align to bottom
: (imageHeight - boundingRect.Height) / 2.0f; // align to center
//Find the rect that the string will draw into inside the dimensions
var drawRect = new RectangleF(xOffset
, yOffset
, boundingRect.Width
, boundingRect.Height);
NSImage image = null;
try
{
//Set antialias or not
NSGraphicsContext.CurrentContext.ShouldAntialias = textDef.isShouldAntialias;
image = new NSImage(new SizeF(imageWidth, imageHeight));
image.LockFocus();
// set a default transform
var transform = new NSAffineTransform();
transform.Set();
stringWithAttributes.DrawInRect(drawRect);
image.UnlockFocus();
// We will use Texture2D from stream here instead of CCTexture2D stream.
var tex = Texture2D.FromStream(CCDrawManager.SharedDrawManager.XnaGraphicsDevice, image);
// Debugging purposes
// var path = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
// var fileName = Path.Combine(path, "Label3.png");
// using (var stream = new FileStream(fileName, FileMode.Create, FileAccess.Write))
// {
// tex.SaveAsPng(stream, imageWidth, imageHeight);
// }
// Create our texture of the label string.
var texture = new CCTexture2D(tex);
return(texture);
}
catch (Exception exc)
{
CCLog.Log("CCLabel: Error creating native label:{0}\n{1}", exc.Message, exc.StackTrace);
}
finally
{
// clean up the resources
if (image != null)
{
image.Dispose();
image = null;
}
if (stringWithAttributes != null)
{
stringWithAttributes.Dispose();
stringWithAttributes = null;
}
}
return(new CCTexture2D());
}
