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annotate README.Porting @ 4590:1ad70fb49fcb

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Fix so many things that there is little place in this column to list them all but the result is that blending modes just work now for drawing primitives. Fixes involved: 1. Fix handling of alpha channel when SDL_BLENDMODE_NONE is set. 2. Make xrendercolor use floating-point values for color channels and then convert to 16 bit ints. 3. Fix handling of visuals in SDL_x11modes.c so that a 32 bit ARGB visual is used. 4. Fix the background pixel value in SDL_x11window.c so that the window background has an alpha value of 0xFF and not 0.
author Sunny Sachanandani <sunnysachanandani@gmail.com>
date Fri, 09 Jul 2010 21:36:41 +0530
parents 103760c3a5dc
children
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1
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2 * Porting To A New Platform
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3
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4 The first thing you have to do when porting to a new platform, is look at
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5 include/SDL_platform.h and create an entry there for your operating system.
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6 The standard format is __PLATFORM__, where PLATFORM is the name of the OS.
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7 Ideally SDL_platform.h will be able to auto-detect the system it's building
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8 on based on C preprocessor symbols.
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9
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10 There are two basic ways of building SDL at the moment:
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12 1. The "UNIX" way: ./configure; make; make install
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14 If you have a GNUish system, then you might try this. Edit configure.in,
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15 take a look at the large section labelled:
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16 "Set up the configuration based on the target platform!"
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17 Add a section for your platform, and then re-run autogen.sh and build!
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19 2. Using an IDE:
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21 If you're using an IDE or other non-configure build system, you'll probably
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22 want to create a custom SDL_config.h for your platform. Edit SDL_config.h,
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23 add a section for your platform, and create a custom SDL_config_{platform}.h,
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24 based on SDL_config.h.minimal and SDL_config.h.in
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26 Add the top level include directory to the header search path, and then add
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27 the following sources to the project:
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28 src/*.c
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29 src/audio/*.c
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30 src/cdrom/*.c
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31 src/cpuinfo/*.c
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32 src/events/*.c
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33 src/file/*.c
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34 src/joystick/*.c
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35 src/stdlib/*.c
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36 src/thread/*.c
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37 src/timer/*.c
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38 src/video/*.c
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39 src/audio/disk/*.c
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40 src/audio/dummy/*.c
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41 src/video/dummy/*.c
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42 src/joystick/dummy/*.c
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43 src/cdrom/dummy/*.c
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44 src/thread/generic/*.c
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45 src/timer/dummy/*.c
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46 src/loadso/dummy/*.c
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49 Once you have a working library without any drivers, you can go back to each
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50 of the major subsystems and start implementing drivers for your platform.
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52 If you have any questions, don't hesitate to ask on the SDL mailing list:
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53 http://www.libsdl.org/mailing-list.php
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55 Enjoy!
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56 Sam Lantinga (slouken@libsdl.org)
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