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xtypes
Description
Xtypes provides scheme bindings for common datatypes used in xlib programming. This egg is meant to be used mainly in conjunction with the xlib egg, as a convenience, because it exposes these various datatypes as high level scheme objects rather than opaque c-pointers. Objects created by the make-* constructors here all have finalizers for automatic garbage collecting.
This library has been developed on an as-needed basis, rather than a methodical one. There are possibly many more datatypes that would be the proper domain of this library to handle, and those can be added as they are reported to me, or as need arises in my own work with xlib.
Datatypes
- XGlyphInfo
- XRectangle
- XRenderColor
Authors
- John J Foerch
Requirements
Chicken eggs
C headers
- X11 development headers (libx11-dev)
- XRender development headers (libxrender-dev)
API
XRectangle
- make-xrectangle x y width heightprocedure
- xrectangle-x rectprocedure
- xrectangle-y rectprocedure
- xrectangle-width rectprocedure
- xrectangle-height rectprocedure
- xrectangle-x-set! rect xprocedure
- xrectangle-y-set! rect yprocedure
- xrectangle-width-set! rect widthprocedure
- xrectangle-height-set! rect heightprocedure
Some of these procedures have the same names as procedures in the xlib egg, so if you are using xtypes and xlib together, you should change your xlib import form to look like this:
(use (except xlib make-xrectangle xrectangle-x xrectangle-y xrectangle-width xrectangle-height) xtypes)
XGlyphInfo
- make-xglyphinfoprocedure
- xglyphinfo-x xginfoprocedure
- xglyphinfo-y xginfoprocedure
- xglyphinfo-width xginfoprocedure
- xglyphinfo-height xginfoprocedure
- xglyphinfo-xoff xginfoprocedure
- xglyphinfo-yoff xginfoprocedure
XRenderColor
The channel values of an xrendercolor are all normalized to a decimal number between 0.0 and 1.0.
- make-xrendercolor r g b #!optional aprocedure
- xrendercolor-red colorprocedure
- xrendercolor-green colorprocedure
- xrendercolor-blue colorprocedure
- xrendercolor-alpha colorprocedure
Examples
TODO
License
BSD
Version History
- 0.1a (January 2, 2012) initial release