2009-10-16 20:59:08 +00:00
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<html><head><title>GRRLIB</title></head><body bgcolor="#FFFFFF" text="#000000"><center><table><tr><td>
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2009-09-13 14:27:01 +00:00
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<center><img src="grrlib_logo.png" /></center>
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<pre><b>
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Table of Contents
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Introduction
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...What is it?
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Developing for the Wii
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...How do I even start?
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Downloading GRRLIB
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...Where do I get it from?
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Installing GRRLIB
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...How do I get it to a useable state?
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Using GRRLIB
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...What essentials do I need to know to get going?
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Upgrading to v4.1.0 From Previous Versions of GRRLIB
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...I upgraded and now my programs won't compile properly!?
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Using SVN
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...What is this SVN thing that the L337 devs keep talking about?
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Credits
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...Who do I thank for all this free stuff?
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Licence
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...When you say "free" do you actually mean something else?
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Introduction
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------------
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GRRLIB is a C/C++ 2D Graphics library for Wii application developers. It is
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essentially a wrapper which presents a friendly interface to the Nintendo GX
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core.
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This document is written to be viewed with equal clarity in either a web browser
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or a text editor.
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As of v4.1.0, GRRLIB is supplied as a standard C/C++ library (aka. archive)
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called 'libgrrlib'. Because GRRLIB processes JPEG and PNG images, it requires
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the installation of the 'libjpeg' and 'libpngu' libraries. 'libpngu', in turn,
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requires 'libpng' and 'libpng' requires 'libz'. GRRLIB also has FileIO
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functions to allow real-time loading and saving of graphical data, and thus also
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requires 'libfat'.
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libgrrlib <- 2D graphics library
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+-- libfat <- File I/O
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+-- libjpeg <- JPEG image processor
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+-- libpngu <- Wii wrapper for libpng
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+-- libpng <- PNG image processor
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2009-10-06 13:11:02 +00:00
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+-- libz <- Zip (lossless) compression (for PNG compression)
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2009-09-13 14:27:01 +00:00
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Developing for the Wii
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----------------------
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Do not progress until you have installed and configured devkitPro. Guides are
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and assistance are available at http://forums.devkitpro.org
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If you have just performed a clean (re)install on your Windows PC, be sure to
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reboot before you continue.
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Downloading GRRLIB
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------------------
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You are invited to use "the latest SVN trunk version" of GRRLIB at all times.
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The SVN repository is located at: http://grrlib.googlecode.com/svn/
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There is a simple guide to "Using SVN" later in this document.
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This document will presume that you have downloaded "the latest SVN trunk
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version" to a directory called C:\grr\trunk
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Installing GRRLIB
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-----------------
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Note: Discussion is underway for 'libpng' and 'libjpeg' to be included with
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devkitPro - obviously, this means that the "bugfix" included here will
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be officially addressed and the "precompiled" libraries will /not/ require
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installation [03-Sept-2009]
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This guide is for Windows. If you are using Linux, I am going to presume you
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are smart enough to convert these instructions.
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GRRLIB is supplied as source code.
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libjpeg is supplied as a precompiled library *1
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libpngu is supplied as source code
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libpng is supplied as a precompiled library
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libz is supplied with devkitpro (Ie. preinstalled)
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libfat is supplied with devkitpro (Ie. preinstalled)
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*1 The version of libjpeg supplied with GRRLIB v4.1.0 contains bug fixes not
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available in the official release. If you can track down the original
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author, please tell him about these fixes.
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2009-10-06 13:11:02 +00:00
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Because of the way dependencies work, the libraries must be installed in reverse
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order.
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libz comes preinstalled with devkitPro, so we can move directly to libpng...
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To install libpng *2
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c:
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cd \grr\trunk\GRRLIB\lib\png
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make install
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Next up the list is libpngu *2
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c:
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cd \grr\trunk\GRRLIB\lib\pngu
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make clean all install
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Next up the list is libjpeg *2 *3
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c:
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cd \grr\trunk\GRRLIB\lib\jpeg
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make install
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*2 A Windows batch-file and a Linux shell-script are included which will
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install the libpng, libpngu and libjpeg libraries in a single command:
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c:
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cd \grr\trunk\GRRLIB\lib
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install <- If you are using Linux, type `./install.sh` instead
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*3 The version of libjpeg supplied with GRRLIB v4.1.0 contains bug fixes not
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available in the official release.
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After all three image processing libraries are installed, we can now install
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libgrrlib:
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c:
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cd \grr\trunk\GRRLIB\GRRLIB
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make clean all install
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Using GRRLIB
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------------
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After everything is installed, simply put
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#include <grrlib.h> <!-- #include <grrlib.h> -->
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at the top of your .c file and use the functions as required
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You will also need to add
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-lgrrlib -lfat -ljpeg -lpngu -lpng -lz
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to the libs line in your makefile
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...Remember the order of the libraries is critical. You may (need to) insert
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other libraries in the middle of the list, you may need to add others to the
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start, or even the end - but do _not_ change the order of the libraries shown
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here.
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You do NOT need to place /anything/ in your application directory.
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If you would like to see a working example of this, you can look at the example
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found in: C:\grr\trunk\examples\bluechip\composition
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...This example also includes a "Makefile" which tries to make it clear what is
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happening (unlike the more comprehensive cross-platform Makefile supplied with
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the devkitPro 'template' application).
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Upgrading to v4.1.0 From Previous Versions of GRRLIB
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----------------------------------------------------
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Older versions of GRRLIB, required a line such as:
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#include "../../../GRRLIB/GRRLIB/GRRLIB.h"
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...to be placed at the top of each C file which uses GRRLB.
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Because GRRLIB is now installed as a system library, this must be replaced with:
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#include <grrlib.h> <!-- #include <grrlib.h> -->
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Older versions of GRRLIB required the 'GRRLIB.h' and 'GRRLIB.c" files to be
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present in every project which uses GRRLIB.
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Because GRRLIB is now installed as a system library, these files are no longer
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required and must be erased.
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*WARNING* Be careful if you have edited (either of) these files.
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Older versions of GRRLIB "passed 'structs'" and therefore Textured Images were
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defined with:
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GRRLIB_texImg tex1, tex2;
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Because GRRLIB now "passes 'pointers'" these definitions should be changed to:
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GRRLIB_texImg *tex1, *tex2;
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With older versions of GRRLIB if the programmer (you) required access to the
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mode and frame information, you were required to add one or more of the
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following three lines:
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extern GXRModeObj *rmode;
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extern void *xfb[2];
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extern u32 fb;
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Because GRRLIB now does this for you automatically, these lines must be removed
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from your code.
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Using SVN
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---------
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SVN stands for "SubVersioN" ...No it doesn't mean much to me either.
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It allows the developers to submit changes to the code in such a way that
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these changes can be easily monitored, quickly merged together with other
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changes. and (if necessary) reverted.
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It also allows the power-users to gain access to the latest (often "in-test")
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features.
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SVN is classically divided in to three chunks:
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trunk - The main development & release code.
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branches - Sometimes a developer may spend a week-or-more making their changes,
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so (s)he will work in a copy of the code until the changes are
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approved by the project leader ...then the changes are "merged" back
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in to trunk.
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tags - These are just copies of the code at critical points, such as
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official releases.
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GRRLIB conforms to this official guideline.
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To obtain the "cutting edge" codebase (ie. the latest in SVN) you need an SVN
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tool ...The same as: if you want to view a web page, you need a web browser
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For Windows you will choose: TortoiseSVN
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For Debian you will choose: apt-get install subversion
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For others you will need to do a bit of research (I only use Debian & Windows)
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Windows:
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Create a directory to hold the code (Eg. C:\grr)
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Right click it and choose "svn checkout"
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Enter the URL of the SVN 'repository': http://grrlib.googlecode.com/svn/
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Click the [...] button and choose the trunk*
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Leave advanced options alone (Ie. fully recursive, head)
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Hit OK
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Linux:
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Create a directory to hold the code (Eg. `mkdir -p /home/user/src/grr`)
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Change to that directory (Eg. `cd /home/user/src/grr`)
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type `svn checkout http://grrlib.googlecode.com/svn/trunk/ grrlib-read-only`*
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* You may choose to check-out any part of the repository you wish, but if you
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venture outide 'trunk' you are likely to get old or broken code.
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If you network connection dies half-way through the download
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Windows: ...simply right-click the directory again and choose "SVN Update"
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Linux: ...Simply type `svn update`
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You may also perform an "update" any time you like to get the latest & greatest
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code changes. But be warned, if you have edited the GRRLIB source code things
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can (and often do) get messy. The best help you can get about this is probably
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here: http://svnbook.red-bean.com/en/1.1/svn-book.html#svn-ch-3-sect-5.4
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Credits
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-------
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Project Leader : NoNameNo
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Documentation : Crayon, BlueChip
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Lead Coder : NoNameNo,
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Support Coders : Crayon, Xane, DragonMinded, BlueChip, elisherer
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Advisors : RedShade, Jespa
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Licence
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-------
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GRRLIB is released under the MIT Licence. If we had chosen the GPL licence you
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would be +forced+ (legally required) to release your source code. But in the
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spirit of "free as in FREE" we have left you with the +option+ to release your
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source code.
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We do +request+ that you tell others about us by naming our library (GRRLIB) in
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the credits of your game/application. And, if you +choose+ to do that, we
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encourage you to use our logo to achieve it; You can find our logo here:
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C:\grr\trunk\grrlib_logo.png
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and here:
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http://grrlib.santo.fr/wiki/images/logo.png
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This is the official license text
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--------------------------------------------------------------------------------
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Copyright (c) 2009 The GRRLIB Team
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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--------------------------------------------------------------------------------
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[BlueChip]
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</b></pre></td></tr></table></center></body></html>
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