mirror of
https://github.com/QB64-Phoenix-Edition/QB64pe.git
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83 lines
3.4 KiB
Plaintext
83 lines
3.4 KiB
Plaintext
{{DISPLAYTITLE:_FONT}}
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The [[_FONT]] statement sets the current [[_LOADFONT]] function font handle to be used by [[PRINT]].
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{{PageSyntax}}
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: [[_FONT]] {{Parameter|fontHandle&}}[, {{Parameter|imageHandle&}}]
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{{Parameters}}
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* {{Parameter|fontHandle&}} is the handle retrieved from [[_LOADFONT]] function, the [[_FONT (function)|_FONT]] function, or a predefined handle.
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* If the image handle is omitted the current image [[_DEST]]ination is used. Zero can designate the current program [[SCREEN]].
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{{PageDescription}}
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* Predefined '''QB64''' font handle numbers can be used before freeing a font:
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**'''_FONT 8 ''' - default font for [[SCREEN (statement)|SCREEN]] 1, 2, 7, 8 or 13
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**'''_FONT 14''' - default font for [[SCREEN (statement)|SCREEN]] 9 or 10
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**'''_FONT 16''' - default font for [[SCREEN (statement)|SCREEN]] 0 ([[WIDTH]] 80, 25 text only), 11 or 12
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**'''_FONT 9, 15''' and '''17''' are the double width versions of 8, 14 and 16 respectively in text '''SCREEN 0 only'''.
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* [[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.
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* Can alpha blend a font with a background screen created by [[_NEWIMAGE]] in 32 bit color.
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* '''Check for valid handle values greater than 0 before using or freeing font handles.'''
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* Free '''unused''' font handles with [[_FREEFONT]]. Freeing invalid handles will create an [[ERROR Codes|"illegal function call"]] error.
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* '''NOTE: SCREEN 0 can only use one font type and style per viewed SCREEN page. Font size may also affect the window size.'''
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{{PageExamples}}
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''Example:'' Previewing a font in SCREEN 0. A different true type font can be substituted below.
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{{CodeStart}}
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fontpath$ = {{Cl|ENVIRON$}}("SYSTEMROOT") + "\fonts\lucon.ttf" 'Find Windows Folder Path.
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{{Cl|DO}}: {{Cl|CLS}}
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{{Cl|DO}}
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style$ = "MONOSPACE"
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{{Cl|PRINT}}
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{{Cl|INPUT}} "Enter A FONT Size 8 {{Cl|TO}} 25: ", fontsize%
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{{Cl|LOOP}} {{Cl|UNTIL}} fontsize% > 7 and fontsize% < 26
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{{Cl|DO}}
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{{Cl|PRINT}}
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{{Cl|INPUT}} "Enter (0) for REGULAR {{Cl|OR}} (1) for ITALIC FONT: ", italic%
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{{Cl|LOOP}} {{Cl|UNTIL}} italic% = 0 or italic% = 1
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{{Cl|DO}}
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{{Cl|PRINT}}
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{{Cl|INPUT}} "Enter (0) for REGULAR {{Cl|OR}} (1) for BOLD FONT: ", bold%
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{{Cl|LOOP}} {{Cl|UNTIL}} italic% = 0 or italic% = 1
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{{Cl|IF}} italic% = 1 {{Cl|THEN}} style$ = style$ + ", ITALIC"
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{{Cl|IF}} bold% = 1 then style$ = style$ + ", BOLD"
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{{Cl|GOSUB}} ClearFont
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font& = {{Cl|_LOADFONT}}(fontpath$, fontsize%, style$)
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{{Cl|_FONT|_FONT }}font&
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{{Cl|PRINT}}
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{{Cl|PRINT}} "This is your LUCON font! Want to try another STYLE?(Y/N): ";
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{{Cl|DO}}: {{Cl|SLEEP}}: K$ = {{Cl|UCASE$}}({{Cl|INKEY$}}): {{Cl|LOOP}} {{Cl|UNTIL}} K$ = "Y" {{Cl|OR}} K$ = "N"
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{{Cl|LOOP}} {{Cl|UNTIL}} K$ = "N"
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{{Cl|GOSUB}} ClearFont
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{{Cl|PRINT}} "This is the QB64 default {{Cl|_FONT|_FONT }}16!"
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{{Cl|END}}
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ClearFont:
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{{Cl|IF}} font& > 0 {{Cl|THEN}}
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{{Cl|_FONT|_FONT }}16 'select inbuilt 8x16 default font
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{{Cl|_FREEFONT}} font&
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{{Cl|END IF}}
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{{Cl|RETURN}}
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{{CodeEnd}}
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'''NOTE:''' [[ENVIRON$]]("SYSTEMROOT") returns a string value of: "C:\WINDOWS". Add the "\FONTS\" folder and the '''.TTF''' font file name.
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{{PageSeeAlso}}
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* [[_FONT (function)]]
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* [[_LOADFONT]], [[_FREEFONT]]
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* [[Unicode]], [[_MAPUNICODE]]
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* [[Windows_Libraries#Font_Dialog_Box|Windows Font Dialog Box]]
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{{PageNavigation}}
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