_CLEARCOLOR (function)
Revision as of 13:46, 5 September 2017 by imported>SMcNeill ([[)
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
