public static CGImage GetImage(string glyphName, int widthUnit, int heightUnit
, float fontSizeUnit
, CGColor textColor
, CGColor backColor
, float?scaleOrNull = null
, PointF?offsetOrNull = null)
{
float scale = scaleOrNull ?? ScaleOfMainScreen;
float fontSize = fontSizeUnit * scale;
var ctfont = new CTFont(FontAwesomeUtil.Font, fontSize, CGAffineTransform.MakeIdentity());
float fontMetric = ctfont.AscentMetric + ctfont.DescentMetric;
ushort[] glyphs = new ushort[] { ctfont.GetGlyphWithName(glyphName) };
int width = (int)(widthUnit * scale);
int height = (int)(heightUnit * scale);
PointF offset = offsetOrNull ?? new PointF(0f, 0f);
offset.X *= scale;
offset.Y *= scale;
CGImage cgImg = SetUpBitmapContextAndDraw(width, height, (cg, rect) => {
if (backColor.Alpha > 0f)
{
cg.SetFillColor(backColor);
cg.FillRect(cg.GetClipBoundingBox());
}
var bounds = ctfont.GetBoundingRects(CTFontOrientation.Default, glyphs);
var x = rect.GetMidX() - bounds.Width / 2f;
x -= bounds.GetMinX();
var y = rect.GetMidY() - fontMetric / 2f;
y += -ctfont.UnderlinePosition + ctfont.UnderlineThickness;
x += offset.X;
y += offset.Y;
// draw bounds
// cg.SetStrokeColor (1f, 1f);
// bounds.X = x;
// bounds.Y = y;
// cg.StrokeRect (bounds);
cg.SetFillColor(textColor);
cg.SetTextDrawingMode(CGTextDrawingMode.Fill);
ctfont.DrawGlyphs(cg, glyphs, new PointF[] { new PointF(x, y) });
});
return(cgImg);
}
// Get square sized image
// using CoreText
public static CGImage GetImageForBarItem(string glyphName, int sizeUnit = 20
, float?scaleOrNull = null
, PointF?offsetOrNull = null)
{
float scale = scaleOrNull ?? ScaleOfMainScreen;
float fontSize = sizeUnit * scale * 0.9f; // 0.9f is a magic value for adjust
var ctfont = new CTFont(FontAwesomeUtil.Font, fontSize, CGAffineTransform.MakeIdentity());
float fontMetric = ctfont.AscentMetric + ctfont.DescentMetric;
ushort[] glyphs = new ushort[] { ctfont.GetGlyphWithName(glyphName) };
int size = (int)(sizeUnit * scale);
PointF offset = offsetOrNull ?? new PointF(0f, 0f);
offset.X *= scale;
offset.Y *= scale;
CGImage img = SetUpBitmapContextForBarItemAndDraw(size, size, (cg, rect) => {
var bounds = ctfont.GetBoundingRects(CTFontOrientation.Default, glyphs);
var x = rect.GetMidX() - bounds.Width / 2f;
x -= bounds.GetMinX();
var y = rect.GetMidY() - fontMetric / 2f;
y += -ctfont.UnderlinePosition + ctfont.UnderlineThickness;
x += offset.X;
y += offset.Y;
#region for_debug
// Console.Write ("Glyph geom {0} : {1}", glyphName, bounds);
// if (rect.Width < bounds.Width || rect.Height < bounds.Height) {
// Console.Write (" Glyph geom larger than bounds");
// }
// Console.WriteLine ();
//
// // draw underline
// cg.SaveState ();
// cg.SetStrokeColor (1f, 0.4f);
// cg.SetLineWidth (ctfont.UnderlineThickness);
// cg.BeginPath ();
// cg.MoveTo (rect.GetMinX (), rect.GetMidY ()+ctfont.UnderlinePosition);
// cg.AddLineToPoint (rect.GetMaxX (), rect.GetMidY ()+ctfont.UnderlinePosition);
// cg.StrokePath ();
//
// cg.SetLineWidth (1f);
// cg.SetStrokeColor (1f, 0.5f);
// cg.BeginPath ();
// cg.StrokeLineSegments (new PointF[] {
// new PointF (rect.GetMinX (), rect.GetMidY () - (fontMetric / 2f))
// , new PointF (rect.GetMaxX (), rect.GetMidY () - (fontMetric / 2f))});
// cg.StrokeLineSegments (new PointF[] {
// new PointF (rect.GetMinX (), rect.GetMidY () + (fontMetric / 2f))
// , new PointF (rect.GetMaxX (), rect.GetMidY () + (fontMetric / 2f))});
//
// cg.RestoreState ();
// // draw diagonal lines
// cg.SetStrokeColor (1f, 0.5f);
// cg.BeginPath ();
// cg.MoveTo (rect.GetMinX (), rect.GetMinY ());
// cg.AddLineToPoint (rect.GetMaxX (), rect.GetMaxY ());
// cg.StrokePath ();
// cg.BeginPath ();
// cg.MoveTo (rect.GetMinX (), rect.GetMaxY ());
// cg.AddLineToPoint (rect.GetMaxX (), rect.GetMinY ());
// cg.StrokePath ();
// // draw bounds
// cg.StrokeRect (new RectangleF (x + bounds.X, y + bounds.Y, bounds.Width, bounds.Height));
#endregion
cg.SetFillColor(1f, 1f);
cg.SetTextDrawingMode(CGTextDrawingMode.Fill);
ctfont.DrawGlyphs(cg, glyphs, new PointF[] { new PointF(x, y) });
});
return(img);
}