CLEARCOLOR (function): Difference between revisions
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(Created page with "{{DISPLAYTITLE:_CLEARCOLOR (function)}} The _CLEARCOLOR function returns the current transparent color of an image or page. {{PageSyntax}} :''result&'' = _CLEARCOLOR [{{Parameter|Source_Handle&}}] {{PageDescription}} * If {{Parameter|Source_Handle&}} is omitted, it is assumed to be the current destination write page. * If {{Parameter|Source_Handle&}} is an invalid handle value(-1), then an ERROR Codes|...") |
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* [[_CLEARCOLOR]] {{ | * [[_CLEARCOLOR]] {{Text|(sets a clear color)}} | ||
* [[_SETALPHA]] {{ | * [[_SETALPHA]] {{Text|(sets color transparency)}} | ||
* [[Images]] | * [[Images]] | ||
{{PageNavigation}} | {{PageNavigation}} | ||
Latest revision as of 22:18, 11 February 2023
The _CLEARCOLOR function returns the current transparent color of an image or page.
Syntax
- result& = _CLEARCOLOR [Source_Handle&]
Description
- If Source_Handle& is omitted, it is assumed to be the current destination write page.
- If Source_Handle& is an invalid handle value(-1), then an invalid handle value is returned.
- In color modes using a palette, the index of the current transparent color value is returned, or -1 if no transparent color is set.
- In 32-bit color modes, zero is returned.
- Returns the color that currently is transparent, or if no color is transparent -1 without error.
- A _CLEARCOLOR statement can set the transparent color of an image or screen.
- NOTE: Default 32 bit backgrounds are clear black or _RGBA(0, 0, 0, 0). Use CLS to make the black opaque.
See also
- _CLEARCOLOR (sets a clear color)
- _SETALPHA (sets color transparency)
- Images