A colourmap class that provides pixel values for a set of mapped colours. More...

Public Member Functions
	ColourMap (Display &, bool greyscale256=false)
	Constructor for a colourmap for the default visual providing 16 colours or 256 grey levels. More...

	ColourMap (Display &, GX::Window &w,::Visual *v)
	Constructor for a colourmap for a specific visual. More...

	~ColourMap ()
	Destructor.

::Colormap	x ()
	Returns the X colourmap id. See XCreateColormap(3).

unsigned long	get (int index) const
	Gets the pixel value for the given index value.

unsigned int	size () const
	Returns 16 for colours or 256 for greyscale.

int	find (unsigned long) const
	Does a reverse lookup to return the index value for the given pixel value. More...

Detailed Description

A colourmap class that provides pixel values for a set of mapped colours.

The map can be for 16 colours or 256 greys. The first colour (0) is black, and the last (15/255) is white.

Definition at line 41 of file gxcolourmap.h.

Constructor & Destructor Documentation

explicit

Constructor for a colourmap for the default visual providing 16 colours or 256 grey levels.

The implementation creates a temporary window.

Definition at line 31 of file gxcolourmap.cpp.

Constructor for a colourmap for a specific visual.

The display reference is kept. The window is only used to determine the screen.

Definition at line 41 of file gxcolourmap.cpp.

int GX::ColourMap::find ( unsigned long p ) const

Does a reverse lookup to return the index value for the given pixel value.

Definition at line 113 of file gxcolourmap.cpp.

The documentation for this class was generated from the following files: