From f69536cf6b0e8d8d6726fd57ce3966df29a88219 Mon Sep 17 00:00:00 2001 From: patacongo Date: Sat, 29 Nov 2008 15:17:47 +0000 Subject: [PATCH] update git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1344 42af7a65-404d-4744-a932-0658087f49c3 --- graphics/README.txt | 54 ++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 53 insertions(+), 1 deletion(-) diff --git a/graphics/README.txt b/graphics/README.txt index a7a053e852..40752d07ef 100644 --- a/graphics/README.txt +++ b/graphics/README.txt @@ -1,2 +1,54 @@ -This directory holds NuttX add-on graphic packages. +README +^^^^^^ + +Roadmap +^^^^^^^ + +This directory holds NuttX graphic packages. Not all of these packages are implemented +at the present, but here is the longer term roadmap: + + NXWIDGETS - A high level, C++, object-oriented library for object-oriented access + to graphics widgets. NXWIDGETS is built on top of NXTOOLKIT and NX. + NXTOOLKIT - A set of C graphics tools that provide higher-level window drawing + operations. The toolkit can be used for window-oriented graphics + without NXWIDGETS and is built on top of NX. + NX - The tiny NuttX windowing system. This includes both a small-footprint, + single user implementaton (NXSU as described below) and a somewhat + larger multi-user implentation (NXMU as described below). Both + conform to the same APIs as defined in include/nuttx/nx.h and, hence, + are more-or-less interchangable. NX can be used without NXWIDGETS + and without NXTOOLKIT for raw access to window memory. + NXGLIB - Low level graphics utilities and direct framebuffer rendering logic. + NX is build on NXGLIB. + +Directories: +^^^^^^^^^^^^ + +graphics/nxglib + The NuttX tiny graphics library. The directory contains generic utilities + support operations on primitive graphics objects and logic to rasterize directly + into a framebuffer. It has no concept of windows (other than the one, framebuffer + window). + +graphics/nxbe + This is the "back-end" of a tiny windowing system. It can be used with either of + two front-ends to complete a windowing system (see nxmu and nxsu below). It + contains most of the important window management logic: clipping, window controls, + window drawing, etc. + +graphics/nxsu + This is the NX single user "front end". When combined with the generic "back-end" + (nxbe), it implements a single thread, single user windowing system. The files + in this directory present the window APIs described in include/nuttx/nx.h. The + single user front-end is selected when CONFIG_NX_MULTIUSER is not defined in the + NuttX configuration file. + +graphics/nxsu + This is the NX multi user "front end". When combined with the generic "back-end" + (nxbe), it implements a multi-threaded, multi-user windowing system. The files + in this directory present the window APIs described in include/nuttx/nx.h. The + multi-user front end includes a graphics server that executes on its own thread; + multiple graphics clients then communicate with the server via a POSIX message + queue to serialize window operations from many threads. The multi-user front-end + is selected when CONFIG_NX_MULTIUSER is defined in the NuttX configuration file.