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26 lines
1.1 KiB
Plaintext
26 lines
1.1 KiB
Plaintext
{{DISPLAYTITLE:_CLEARCOLOR (function)}}
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The [[_CLEARCOLOR (function)|_CLEARCOLOR]] function returns the current transparent color of an image or page.
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{{PageSyntax}}
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:''result&'' = [[_CLEARCOLOR (function)|_CLEARCOLOR]] [{{Parameter|Source_Handle&}}]
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{{PageDescription}}
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* If {{Parameter|Source_Handle&}} is omitted, it is assumed to be the current [[_DEST|destination]] write page.
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* If {{Parameter|Source_Handle&}} is an invalid handle value(-1), then an [[ERROR Codes|invalid handle value]] is returned.
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* In color modes using a palette, the index of the current transparent color value is returned, or -1 if no transparent color is set.
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* In 32-bit color modes, zero is returned.
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* Returns the color that currently is transparent, or if no color is transparent -1 without error.
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* A [[_CLEARCOLOR]] statement can set the transparent color of an image or screen.
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* '''NOTE: Default 32 bit backgrounds are clear black or [[_RGBA]](0, 0, 0, 0). Use [[CLS]] to make the black opaque.'''
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{{PageSeeAlso}}
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* [[_CLEARCOLOR]] {{text|(sets a clear color)}}
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* [[_SETALPHA]] {{text|(sets color transparency)}}
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* [[Images]]
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{{PageNavigation}}
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