mirror of
https://github.com/moparisthebest/Simba
synced 2024-11-14 05:15:16 -05:00
22 lines
1.0 KiB
ReStructuredText
22 lines
1.0 KiB
ReStructuredText
Linux Specific Implementation Details
|
|
=====================================
|
|
|
|
The Linux specific implementation of the IOManager is written around the Linux
|
|
X11 Windowing System. The X11 windowing system can run simultaneously to other
|
|
X11 Window Systems, and each is defined by a ``Display``.
|
|
|
|
A ``Window`` on a ``Display`` is represented as an unsigned integer.
|
|
|
|
To retreive data that is on a window, we use the XGetImage function. This
|
|
function returns an XImage which contains the raw data. Simba then returns the
|
|
pointer to this data. The image has to be freed afterwards; and this is done in
|
|
the ``FreeReturnData`` procedure. Alternatively we could copy the image data to
|
|
another place and then free the XImage, but this would result in additional
|
|
overhead.
|
|
|
|
Most mouse related functionality is implemented with XQueryPointer, XWarpPointer
|
|
and XTestFakeButtonEvent. (Requires XTest Extension)
|
|
|
|
All the keyboard functions use XTest as well. It currently lacks the
|
|
functionality to test if a key on the keyboard is down.
|