BACKGROUNDCOLOR: Difference between revisions
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* Use it to get the current background color to restore it later in a program. | * Use it to get the current background color to restore it later in a program. | ||
* In legacy [[SCREEN]] modes and in [[_NEWIMAGE]] 256 colors mode the color attribute/palette index is returned. | * In legacy [[SCREEN]] modes and in [[_NEWIMAGE]] 256 colors mode the color attribute/palette index is returned. | ||
* In [[_NEWIMAGE]] 32-bit mode the [[_RGBA32]] value ('''&H00{{ | * In [[_NEWIMAGE]] 32-bit mode the [[_RGBA32]] value ('''&H00{{Text|00|red}}{{Text|00|green}}{{Text|00|blue}}''' to '''&HFF{{Text|FF|red}}{{Text|FF|green}}{{Text|FF|blue}}''') is returend, make sure to store it in an [[_UNSIGNED]] [[LONG]] variable (as seen in the syntax above with the '''~&''' suffix), otherwise the blue component may be lost. | ||
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;Example:Storing the background color for later use. | ;Example:Storing the background color for later use. | ||
{{CodeStart}} | {{CodeStart}} | ||
{{Cl|SCREEN}} 0 | {{Cl|SCREEN}} {{Text|0|#F580B1}} | ||
{{Cl|COLOR}} 1, 3 'set color 1 as foreground, color 3 as background | {{Cl|COLOR}} {{Text|1|#F580B1}}, {{Text|3|#F580B1}} {{Text|<nowiki>'set color 1 as foreground, color 3 as background</nowiki>|#919191}} | ||
{{Cl|CLS}} | {{Cl|CLS}} | ||
col~& = {{Cl|_BACKGROUNDCOLOR}} | col~& = {{Cl|_BACKGROUNDCOLOR}} | ||
Latest revision as of 16:19, 19 March 2023
The _BACKGROUNDCOLOR function returns the current background color for an image handle or page.
Syntax
- col~& = _BACKGROUNDCOLOR [(imageHandle&)]
Parameters
- If imageHandle& is omitted, it is assumed to be the current write page or image designated by _DEST.
- If imageHandle& is an invalid handle, an Invalid handle error occurs. Check handle values first. Zero designates the current screen.
Description
- Use it to get the current background color to restore it later in a program.
- In legacy SCREEN modes and in _NEWIMAGE 256 colors mode the color attribute/palette index is returned.
- In _NEWIMAGE 32-bit mode the _RGBA32 value (&H00000000 to &HFFFFFFFF) is returend, make sure to store it in an _UNSIGNED LONG variable (as seen in the syntax above with the ~& suffix), otherwise the blue component may be lost.
Examples
- Example
- Storing the background color for later use.
SCREEN 0 COLOR 1, 3 'set color 1 as foreground, color 3 as background CLS col~& = _BACKGROUNDCOLOR PRINT col~& |
3
|
See also