Overview of the Solaris Transparent Overlay Window API

The transparent overlay window API includes the routines listed in Table 6-2. These routines are provided by libXext.so. To use the Solaris overlay routines, do the following:

Include the file /usr/openwin/include/X11/extensions/transovl.h
Link the library device handler with the library /usr/openwin/lib/libXext.so

Table 6-2 List of Transparent Overlay Window Routines

Name	Description
`XSolarisOvlCreateWindow`	Creates an overlay window.
`XSolarisOvlIsOverlayWindow`	Indicates whether a window is an overlay window.
`XSolarisOvlSetPaintType`	Specifies the type of paint rendered by subsequent Xlib drawing.
`XSolarisOvlGetPaintType`	Gets the current paint type.
`XSolarisOvlSetWindowTransparent`	Sets the background state of an overlay window to be transparent.
`XSolarisOvlCopyPaintType`	Renders opaque and transparent paint into the destination drawable based on the paint type attributes of the pixels in the source drawable.
`XSolarisOvlCopyAreaAndPaintType`	Copies the area and paint type from one pair of drawables to another.
`XReadScreen`	Returns the displayed colors in a rectangle of the screen.
`XSolarisOvlSelectPartner`	Returns the optimal overlay or underlay visual for an existing visual.XSolarisOvlSelectPairSelects an optimal overlay/underlay pair that best meets a set of defined criteria for the overlay and underlay visuals.

The remainder of this chapter discusses the transparent overlay API routines.

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