Difference between revisions of "LOADFONT"

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* ''font_handle'' is the handle you want to use to represent the font. A return of -1 indicates a font loading failure.
* ''font_handle'' variable value designates the font to use like a file number. A return of -1 indicates a font loading failure.
* ''TTF_filename$'' is the filename of '''truetype''' fonts only. Can include the path to the font file.  
* ''TTF_filename$'' is the filename of '''truetype''' fonts only. Can include the path to the font file.  
* Windows users should find TTF(True Type) font files in the C:\WINDOWS\FONTS folder.
* Windows users should find '''TTF''' font files in the C:\WINDOWS\FONTS folder. Use the font properties to see the '''real filename'''.
* ''Height'' is the height of the font. Font sizes can be found using the [[_FONTHEIGHT]] and [[_FONTWIDTH]] functions.
* ''Height'' is the height of the font. Font sizes can be found using the [[_FONTHEIGHT]] and [[_FONTWIDTH]] functions.
* ''Style'' parameter(s) used, if any, are literal(in quotes) or variable text parameters. Monospace has limited font selections.
* ''Style'' parameter(s) used, if any, are literal(in quotes) or variable text parameters. Monospace has limited font selections.
* You can pass different font styles using different predefined [[STRING]] variable lists. You '''can''' include an empty style string!
* You can pass different font styles using different predefined [[STRING]] variable lists. You '''can''' include an empty style string!
* Font handles with values greater than 0 that are no longer needed should be freed using [[_FREEFONT]]. Font handle values of -1 (load failure) do not need to be freed! An [[ERROR Codes|error]] will occur if you try to free invalid handles!
* Font handles with values greater than 0 and are no longer needed should be freed using [[_FREEFONT]]. Font handle values of -1 (load failure) do not need to be freed! An [[ERROR Codes|error]] will occur if you try to free invalid handles!
* Check that the font values are greater than 0 before using them or [[ERROR Codes|illegal function errors]] may occur!
* Check that the font values are greater than 0 before using them or [[ERROR Codes|illegal function errors]] may occur!



Revision as of 19:21, 7 July 2010

The _LOADFONT function returns a font handle for a TrueType font (.TTF).


Syntax

handle& = _LOADFONT (ttf_filename$, height[, "BOLD|, ITALIC|, UNDERLINE|, DONTBLEND|, MONOSPACE"])



Description

  • font_handle variable value designates the font to use like a file number. A return of -1 indicates a font loading failure.
  • TTF_filename$ is the filename of truetype fonts only. Can include the path to the font file.
  • Windows users should find TTF font files in the C:\WINDOWS\FONTS folder. Use the font properties to see the real filename.
  • Height is the height of the font. Font sizes can be found using the _FONTHEIGHT and _FONTWIDTH functions.
  • Style parameter(s) used, if any, are literal(in quotes) or variable text parameters. Monospace has limited font selections.
  • You can pass different font styles using different predefined STRING variable lists. You can include an empty style string!
  • Font handles with values greater than 0 and are no longer needed should be freed using _FREEFONT. Font handle values of -1 (load failure) do not need to be freed! An error will occur if you try to free invalid handles!
  • Check that the font values are greater than 0 before using them or illegal function errors may occur!


Examples

Example 1: You need to know that if you are in a text mode (such as SCREEN 0 - the default) then you will only be able to use mono-spaced (fixed width) fonts.

font$ = "C:\WINDOWS\Fonts\cour.ttf" 'TTF file in Windows style$ = "monospace, italic, bold" 'font style f& =_LOADFONT(font$, 30, style$) _FONT f& PRINT "Hello!"

Hello!

Note: 30 means each row of text (including vertical spacing) will be exactly 30 pixels high. This may make some program screens larger. If you don't want a style listed just use style$ = "" if using a STRING variable for different calls.


Example 2: In a 32-bit graphics mode you can alpha blend onto the background:

i& =_NEWIMAGE(800,600,32) SCREEN i& COLOR &HC0FFFF00,&H200000FF f& =_LOADFONT("C:\Windows\Fonts\times.ttf", 25) 'normal style PRINT "Hello!"

Hello!


Note: You can load a fixed width font file without using the "monospace" option and it will be treated as variable width. This can be useful because LOCATE treats the horizontal position as an offset in pixels for variable width fonts.


QB64 Font SUBs and Functions:

SUB _FREEFONT font_handle
SUB _FONT font_handle[,image_handle]
FUNC _FONT (function) font_handle = _FONT[(image_handle)]
SUB _PRINTSTRING (x,y), text_to_print$[,image_handle]
FUNC _PRINTWIDTH width_in_pixels = _PRINTWIDTH(text_to_print$[,image_handle])
SUB _PRINTMODE _FILLBACKGROUND/_KEEPBACKGROUND/_ONLYBACKGROUND[,image_handle]
FUNC _PRINTMODE (function) 1 keepbackground/2 onlybackground/3 fillbackground =_PRINTMODE[(image_handle)]
FUNC _FONTHEIGHT character_height_in_pixels = _FONTHEIGHT[(font_handle)]
FUNC _FONTWIDTH character_width_in_pixels = _FONTWIDTH[(font_handle)]




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