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| author | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
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| committer | Timothy Pearson <kb9vqf@pearsoncomputing.net> | 2011-07-10 15:24:15 -0500 |
| commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
| tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /doc/html/embedporting.html | |
| download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip | |
Add Qt3 development HEAD version
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| -rw-r--r-- | doc/html/embedporting.html | 89 |
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diff --git a/doc/html/embedporting.html b/doc/html/embedporting.html new file mode 100644 index 0000000..72ecdd9 --- /dev/null +++ b/doc/html/embedporting.html @@ -0,0 +1,89 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/doc/embporting.doc:36 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>Issues to be aware of when porting Qt/Embedded</title> +<style type="text/css"><!-- +fn { margin-left: 1cm; text-indent: -1cm; } +a:link { color: #004faf; text-decoration: none } +a:visited { color: #672967; text-decoration: none } +body { background: #ffffff; color: black; } +--></style> +</head> +<body> + +<table border="0" cellpadding="0" cellspacing="0" width="100%"> +<tr bgcolor="#E5E5E5"> +<td valign=center> + <a href="index.html"> +<font color="#004faf">Home</font></a> + | <a href="classes.html"> +<font color="#004faf">All Classes</font></a> + | <a href="mainclasses.html"> +<font color="#004faf">Main Classes</font></a> + | <a href="annotated.html"> +<font color="#004faf">Annotated</font></a> + | <a href="groups.html"> +<font color="#004faf">Grouped Classes</font></a> + | <a href="functions.html"> +<font color="#004faf">Functions</font></a> +</td> +<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Issues to be aware of when porting Qt/Embedded</h1> + + + +<p> Qt/Embedded is designed to be reasonably platform-independent. The +only publically available version is a Linux implementation. The +following dependencies will need to be addressed if you intend to port +to another operating system (files that you need to modify are listed +at the end of each section): +<p> <ul> +<p> <li> <b>System V IPC</b> (shared memory and semaphores) is used to share +window regions between client and server. You will need to provide +something similar unless you want a single-application setup (i.e. +running only one program, which is the server). System V semaphores +are also used for synchronising access to the framebuffer. +<p> Modify <tt>qwindowsystem_qws.cpp</tt>, <tt>qwsregionmanager_qws.cpp</tt>, <tt>qapplication_qws.cpp</tt>, and <tt>qlock_qws.cpp</tt>. +<p> <li> <b>Unix-domain sockets</b> are used to communicate things like +keyboard events, requests to raise windows and QCOP messages between +applications. Again, you will need to provide something similar unless +you want a single-application setup. It should be possible to +implement something like this using message queues or similar +mechanisms; with the exception of QCOP messages (which are generated +by client applications and not Qt/Embedded) individual messages should +be no more than a few bytes in length. +<p> Modify <tt>qwssocket_qws.cpp</tt>. +<p> <li> <b>The Linux framebuffer device</b> is used to map in the drawing +area. You will need to replace it (by creating a new class of <a href="qscreen.html">QScreen</a>) +with something else giving a byte pointer to a memory-mapped +framebuffer, plus information about width, height and bit depth (which +most likely you can simply hard-code). If your framebuffer is not +memory-mapped or is in an unsupported format or depth you will need to +modify QGfxRaster as well. +<p> Modify <tt>qgfxlinuxfb_qws.cpp</tt>. +<p> <li> <b>The accelerated drivers</b> currently use the Linux QScreen and use +<tt>/proc/bus/pci</tt> to map in PCI config space. However, these are only +example drivers; you will probably need to write your own driver in +any case, and you will need to provide your own way to map in control +registers. +<p> Modify <tt>qgfxmach64_qws.cpp</tt>, <tt>qgfxvoodoo_qws.cpp</tt> and <tt>qgfxmatrox_qws.cpp</tt>. +<p> <li> <b>Sound</b> uses a Linux <tt>/dev/dsp</tt> style device. If you want to use +the Qt/Embedded sound server you'll need to reimplement it. +<p> Modify <tt>qsoundqss_qws.cpp</tt>. +<p> <li> <b>select()</b> is used to implement QSocketDevices and listen for +events to/from the Qt/Embedded server application. +<p> Modify <tt>qapplication_qws.cpp</tt>. +<p> </ul> +<p> Qt/Embedded makes use of the standard C library and some Posix functions. +Mostly the latter are concentrated in platform dependent code anyway +(e.g. mmap() to map in the Linux framebuffer). +<p> +<!-- eof --> +<p><address><hr><div align=center> +<table width=100% cellspacing=0 border=0><tr> +<td>Copyright © 2007 +<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> +<td align=right><div align=right>Qt 3.3.8</div> +</table></div></address></body> +</html> |