CGContextMBS.SaveGState

Some examples using this method:

• /GraphicsMagick/GraphicsMagick/SVG Test/SVG Rastor
• /MacCG/CG Ovals with PDF in memory
• /MacCG/CGGradient test
• /MacCG/CoreGraphics Bitmap
• /MacCG/CoreGraphics PDF/PDF Text
• /MacCG/CoreGraphics PDF/PDF using Save and Restore
• /MacCG/CoreText/CoreText Dynamic Text Height
• /MacCG/Print PDF with CoreGraphics/Print PDF with CoreGraphics
• /MacCG/Quartz Gradients
• /MacCG/Rotate PDF Page

CGContextMBS.ScaleCTM(sx as Double, sy as Double)

Some examples using this method:

• /MacCG/CG Ovals
• /MacCG/CG Ovals with PDF in memory
• /MacFrameworks/MapKit/MapKit Test

CGContextMBS.SelectFont(name as string, size as Double, fontencoding as Integer)

Name: string that contains the PostScript name of the font to set.

'textEncoding' specifies how to translate from bytes to glyphs.

kCGEncodingFontSpecific	0
kCGEncodingMacRoman	1

As "Comic Sans MS" works, but not ""Comic Sans ms" this functions seems to be case sensitive.

Matthias Buercher notes that sometimes a font is not selected if the RGBFillColor was not set before.

You may need to reset the textmatrix with some code like c.TextMatrix = CGAffineTransformMBS.Identity. If the text matrix is different, your text may be rotated, skewed or resized.

Some examples using this method:

• /MacCG/Carbon Print Manager/Carbon Print Hello
• /MacCG/CoreGraphics Bitmap
• /MacCG/CoreGraphics PDF/PDF Font list
• /MacCG/CoreGraphics PDF/PDF Text

CGContextMBS.SetAllowsAntialiasing(allowsAntialiasing as boolean)

Allow antialiasing in context if allowsAntialiasing is true; don't allow it otherwise. This parameter is not part of the graphics state. A context will perform antialiasing if both allowsAntialiasing and the graphics state parameter shouldAntialias are true.
Requires Mac OS X 10.4 to work.

CGContextMBS.SetBlendMode(BlendMode as Integer)

Requires Mac OS X 10.4.

CGContextMBS.SetFillColor(color as CGColorMBS)

CGContextMBS.SetFillColorSpace(colorspace as CGColorSpaceMBS)

CGContextMBS.SetFont(font as CGFontMBS)

CGContextMBS.SetLineDash(phase as Double, lengths as memoryblock, count as Integer)

phase:
A value that specifies how far into the dash pattern the line starts, in units of the user space. For example, passing a value of 3 means the line is drawn with the dash pattern starting at three units from its beginning. Passing a value of 0 draws a line starting with the beginning of a dash pattern.

lengths:
A memoryblock of float values that specify the lengths of the painted segments and unpainted segments, respectively, of the dash pattern—or nil for no dash pattern.

For example, passing a memoryblock with the values [2,3] sets a dash pattern that alternates between a 2-user-space-unit-long painted segment and a 3-user-space-unit-long unpainted segment. Passing the values [1,3,4,2] sets the pattern to a 1-unit painted segment, a 3-unit unpainted segment, a 4-unit painted segment, and a 2-unit unpainted segment.

count
If the lengths parameter specifies a memorybloc, pass the number of elements in the memoryblock. Otherwise, pass 0.

CGContextMBS.SetShadow(x as Double, y as Double, blur as Double)

Sub Paint(g As Graphics)
  Var c as CGContextMBS
  
  c=window1.CGContextMBS
  
  c.SetShadow 5,5,0.5
  c.SetRGBFillColor 1,0,0,1
  c.FillRect CGMakeRectMBS(100,100,100,100)
  c.Flush
  
End Sub

x/y: Specifies a translation of the context's coordinate system, to establish an offset for the shadow ({0,0} specifies a light source immediately above the screen).
blur: A non-negative number specifying the amount of blur.

Shadow parameters are part of the graphics state in a context. After shadowing is set, all objects drawn are shadowed using a black color with 1/3 alpha (i.e., RGBA = {0, 0, 0, 1.0/3.0}) in the DeviceRGB color space.

To turn off shadowing:

• Use the standard save/restore mechanism for the graphics state.
• Use CGContextSetShadowWithColor to set the shadow color to a fully transparent color (or pass nil as the color).

CGContextMBS.SetShadowWithColor(x as Double, y as Double, blur as Double, colorvalue as CGColorMBS)

x/y: Specifies a translation in base-space.
blur: A non-negative number specifying the amount of blur.
colorvalue: Specifies the color of the shadow, which may contain a non-opaque alpha value. If nil, then shadowing is disabled.

See also SetShadow.

CGContextMBS.SetShouldSmoothFonts(shouldSmoothFonts as boolean)

Turn on font smoothing if shouldSmoothFonts is true; turn it off otherwise. This parameter is part of the graphics state. Note that this doesn't guarantee that font smoothing will occur: not all destination contexts support font smoothing.
Requires Mac OS X 10.2.

CGContextMBS.SetStrokeColor(color as CGColorMBS)

CGContextMBS.SetStrokeColorSpace(colorspace as CGColorSpaceMBS)

CGContextMBS.ShowText(text as string)

Each byte of the string is mapped through the encoding vector of the current font to obtain the glyph to display.
This function is more for quick and dirty text output, but not for serious drawing as it does not do most unicode strings correctly. Use ATS for better drawing.

Some RB 5.x versions show a bug that the text is not displayed on a CGContext in while running the application in debug mode.

CGContextMBS.ShowTextAtPoint(text as string, x as Double, y as Double)

Each byte of the string is mapped through the encoding vector of the current font to obtain the glyph to display.
This function is more for quick and dirty text output, but not for serious drawing as it does not do most unicode strings correctly. Use ATS for better drawing.

Some RB 5.x versions show a bug that the text is not displayed on a CGContext in while running the application in debug mode.

Some examples using this method:

• /MacCG/Carbon Print Manager/Carbon Print Hello
• /MacCG/CoreGraphics Bitmap
• /MacCG/CoreGraphics PDF/PDF Font list
• /MacCG/CoreGraphics PDF/PDF Text

CGContextMBS.StrokeEllipseInRect(rect as CGRectMBS)

Requires Mac OS X 10.4.

CGContextMBS.StrokePath

Var c as CGContextMBS

c=window1.CGContextMBS

c.SetRGBStrokeColor 1,0,0,1
c.BeginPath
c.MoveToPoint 0,0
c.AddLineToPoint 100,100
c.StrokePath
c.Flush

CGContextMBS.StrokeRect(rect as CGRectMBS)

CGContextMBS.StrokeRectWithWidth(rect as CGRectMBS, width as Double)

CGContextMBS.strokeRoundedRect(x as Double, y as Double, w as Double, h as Double, arcWidth as Double, arcHeight as Double)

Var c as CGContextMBS

c=window1.CGContextMBS

// fill in red
c.SetRGBFillColor 1,0,0,1
c.fillRoundedRect 100,100,100,100,20,20

// draw in green
c.SetRGBStrokeColor 0,1,0,1
c.strokeRoundedRect 100,100,100,100,20,20

CGContextMBS.Synchronize