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b586eafd3b
LINE INPUT will now use the faster method if passed a file handle that has been opened FOR BINARY. As such, the _BLINEINPUT command has been removed. qb64.bas now takes advantage of this for reading from '$include files, at least in Include Manager 1. Some tweaking of internal/source/main.txt was required to get things into a sane state, so I'm holing off changing the compiler any further so the auto-builder can make sure everything's smoothed over. Note: Everything should still compile as normal; I'm just being overcautious.
34 lines
1.2 KiB
Plaintext
34 lines
1.2 KiB
Plaintext
The {{KW|_HEIGHT}} function returns the height of an image handle or current write page.
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{{PageSyntax}}
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:''result&'' = {{KW|_HEIGHT}}[({{Parameter|imageHandle&}})]
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{{PageDescription}}
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* If {{Parameter|imageHandle&}} is omitted, it's assumed to be the handle of the current write page.
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* To get the width of the current program window use zero for the handle value: depth& = _HEIGHT(0)
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* If the image specified by {{Parameter|imageHandle&}} is in text mode, the number of characters per column is returned.
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* If the image specified by {{Parameter|imageHandle&}} is in graphics mode, the number of pixels per column is returned.
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* If {{Parameter|imageHandle&}} is an invalid handle, then an [[ERROR Codes|invalid handle]] error will occur.
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* The maximum pixel coordinate of a program [[SCREEN|screen]] is one less than what the function returns.
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''Example:'' Displays the current program window area.
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{{CodeStart}} '' ''
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{{Cl|SCREEN}} 12
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wide = {{Cl|_WIDTH (function)|_WIDTH}}
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deep = {{Cl|_HEIGHT}}
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{{Cl|PRINT}} "The program screen is"; wide; "X"; deep '' ''
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{{CodeEnd}}
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{{PageSeeAlso}}
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* [[_WIDTH (function)]]
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* [[_LOADIMAGE]]
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* [[_FONTHEIGHT]]
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* [[Bitmaps]]
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{{PageNavigation}} |