FONT: Difference between revisions

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(Created page with "{{DISPLAYTITLE:_FONT}} The _FONT statement sets the current _LOADFONT function font handle to be used by PRINT. {{PageSyntax}} : _FONT {{Parameter|fontHandle&}}[, {{Parameter|imageHandle&}}] {{Parameters}} * {{Parameter|fontHandle&}} is the handle retrieved from _LOADFONT function, the _FONT function, or a predefined handle. * If the image handle is omitted the current image _DESTination is used. Zero can designate the cu...")
 
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{{DISPLAYTITLE:_FONT}}
{{DISPLAYTITLE:_FONT}}
The [[_FONT]] statement sets the current [[_LOADFONT]] function font handle to be used by [[PRINT]].  
The [[_FONT]] statement sets the current [[_LOADFONT]] function font handle to be used by [[PRINT]].




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{{PageExamples}}
{{PageExamples}}
''Example:'' Previewing a font in SCREEN 0. A different true type font can be substituted below.  
''Example:'' Previewing a font in SCREEN 0. A different true type font can be substituted below.
{{CodeStart}}
{{CodeStart}}


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   {{Cl|GOSUB}} ClearFont
   {{Cl|GOSUB}} ClearFont
   font& = {{Cl|_LOADFONT}}(fontpath$, fontsize%, style$)
   font& = {{Cl|_LOADFONT}}(fontpath$, fontsize%, style$)
   {{Cl|_FONT|_FONT }}font&
   {{Cl|_FONT|_FONT }}font&
   {{Cl|PRINT}}
   {{Cl|PRINT}}
   {{Cl|PRINT}} "This is your LUCON font! Want to try another STYLE?(Y/N): ";  
   {{Cl|PRINT}} "This is your LUCON font! Want to try another STYLE?(Y/N): ";
   {{Cl|DO}}: {{Cl|SLEEP}}: K$ = {{Cl|UCASE$}}({{Cl|INKEY$}}): {{Cl|LOOP}} {{Cl|UNTIL}} K$ = "Y" {{Cl|OR}} K$ = "N"
   {{Cl|DO}}: {{Cl|SLEEP}}: K$ = {{Cl|UCASE$}}({{Cl|INKEY$}}): {{Cl|LOOP}} {{Cl|UNTIL}} K$ = "Y" {{Cl|OR}} K$ = "N"
{{Cl|LOOP}} {{Cl|UNTIL}} K$ = "N"
{{Cl|LOOP}} {{Cl|UNTIL}} K$ = "N"
Line 59: Line 59:
{{Cl|END}}
{{Cl|END}}


ClearFont:  
ClearFont:
{{Cl|IF}} font& > 0 {{Cl|THEN}}
{{Cl|IF}} font& > 0 {{Cl|THEN}}
     {{Cl|_FONT|_FONT }}16  'select inbuilt 8x16 default font
     {{Cl|_FONT|_FONT }}16  'select inbuilt 8x16 default font

Revision as of 01:39, 23 January 2023

The _FONT statement sets the current _LOADFONT function font handle to be used by PRINT.


Syntax

_FONT fontHandle&[, imageHandle&]


Template:Parameters

  • fontHandle& is the handle retrieved from _LOADFONT function, the _FONT function, or a predefined handle.
  • If the image handle is omitted the current image _DESTination is used. Zero can designate the current program SCREEN.


Description

  • Predefined QB64 font handle numbers can be used before freeing a font:
    • _FONT 8 - default font for SCREEN 1, 2, 7, 8 or 13
    • _FONT 14 - default font for SCREEN 9 or 10
    • _FONT 16 - default font for SCREEN 0 (WIDTH 80, 25 text only), 11 or 12
    • _FONT 9, 15 and 17 are the double width versions of 8, 14 and 16 respectively in text SCREEN 0 only.
  • Unicode characters can be assigned to a monospace font that contains those unicode characters using the _MAPUNICODE TO ASCII mapping statement. The optional IME cyberbit.ttf font included with QB64 can also be used.
  • Can alpha blend a font with a background screen created by _NEWIMAGE in 32 bit color.
  • Check for valid handle values greater than 0 before using or freeing font handles.
  • Free unused font handles with _FREEFONT. Freeing invalid handles will create an "illegal function call" error.
  • NOTE: SCREEN 0 can only use one font type and style per viewed SCREEN page. Font size may also affect the window size.


Examples

Example: Previewing a font in SCREEN 0. A different true type font can be substituted below.


fontpath$ = ENVIRON$("SYSTEMROOT") + "\fonts\lucon.ttf" 'Find Windows Folder Path.
DO: CLS
  DO
    style$ = "MONOSPACE"
    PRINT
    INPUT "Enter A FONT Size 8 TO 25: ", fontsize%
  LOOP UNTIL fontsize% > 7 and fontsize% < 26
  DO
    PRINT
    INPUT "Enter (0) for REGULAR OR (1) for ITALIC FONT: ", italic%
  LOOP UNTIL italic% = 0 or italic% = 1
  DO
    PRINT
    INPUT "Enter (0) for REGULAR OR (1) for BOLD FONT: ", bold%
  LOOP UNTIL italic% = 0 or italic% = 1
  IF italic% = 1 THEN style$ = style$ + ", ITALIC"
  IF bold% = 1 then style$ = style$ + ", BOLD"

  GOSUB ClearFont
  font& = _LOADFONT(fontpath$, fontsize%, style$)
  _FONT font&
  PRINT
  PRINT "This is your LUCON font! Want to try another STYLE?(Y/N): ";
  DO: SLEEP: K$ = UCASE$(INKEY$): LOOP UNTIL K$ = "Y" OR K$ = "N"
LOOP UNTIL K$ = "N"
GOSUB ClearFont

PRINT "This is the QB64 default _FONT 16!"
END

ClearFont:
IF font& > 0 THEN
    _FONT 16   'select inbuilt 8x16 default font
    _FREEFONT font&
END IF
RETURN

NOTE: ENVIRON$("SYSTEMROOT") returns a string value of: "C:\WINDOWS". Add the "\FONTS\" folder and the .TTF font file name.



See also



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