Mercurial > sdl-ios-xcode
view README.Qtopia @ 4168:69bcba65c388 SDL-1.2
Fixed bug #526
Comment #1 From Simon Howard 2009-03-20 16:50:56
Hi,
I'm the author of Chocolate Doom, one of the other source ports that James
mentioned. This is a patch against the current SVN version of SDL 1.2 that
fixes the bug. It has been tested and hopefully should be obviously correct
from examining the changes. I'll give a brief explanation.
When the palette is set with SDL_SetPalette, the IDirectDrawPalette_SetEntries
DirectX function is invoked. However, when this happens, a WM_PALETTECHANGED
message is sent to the window.
A WM_PALETTECHANGED message can also be received if the palette is changed for
some other reason, like if the system palette is changed. Therefore, the
palette change handler (DX5_PaletteChanged) has code to deal with this case.
It distinguishes "expected" palette changes (set with SDL_SetPalette) from
"unexpected" palette changes using the colorchange_expected variable, which is
set before calling IDirectDrawPalette_SetEntries. However, the code to set
this variable is missing in the fullscreen code path. By setting this
variable, the palette change is handled properly and the freezes go away.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Mon, 13 Apr 2009 00:53:12 +0000 |
parents | 2c5d4c22a2ac |
children |
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============================================================================== Using the Simple DirectMedia Layer with Qtopia/OPIE ============================================================================== ============================================================================== I. Setting up the Qtopia development environment. This document will not explain how to setup the Qtopia development environment. That is outside the scope of the document. You can read more on this subject in this excellent howto: http://www.zauruszone.com/howtos/linux_compiler_setup_howto.html ============================================================================== II. Building the Simple DirectMedia Layer libraries using the arm cross-compiler This is somewhat tricky since the name of the compiler binaries differ from the standard. Also you should disable features not needed. The command below works for me. Note that it's all one line. You can also set the NM, LD etc environment variables separately. NM=arm-linux-nm LD=arm-linux-ld CC=arm-linux-gcc CXX=arm-linux-g++ RANLIB=arm-linux-ranlib AR=arm-linux-ar ./configure --enable-video-qtopia --disable-video-dummy --disable-video-fbcon --disable-video-dga --disable-arts --disable-esd --disable-alsa --disable-cdrom --disable-video-x11 --disable-nasm --prefix=/opt/Qtopia/sharp/ arm-unknown-linux-gnu One thing to note is that the above configure will include joystick support, even though you can't have joysticks on the Zaurus. The reason for this is to avoid link / compile / runtime errors with applications that have joystick support. ============================================================================== III. Building the Simple DirectMedia Layer test programs: After installing, making sure the correct sdl-config is in your path, run configure like this: NM=arm-linux-nm LD=arm-linux-ld CC=arm-linux-gcc CXX=arm-linux-g++ AR=arm-linux-ar ./configure arm-unknown-linux-gnu ============================================================================== IV. Application porting notes One thing I have noticed is that applications sometimes don't exit correctly. Their icon remains in the taskbar and they tend to relaunch themselves automatically. I believe this problem doesn't occur if you exit your application using the exit() method. However, if you end main() with 'return 0;' or so, this seems to happen. Also note that when running in landscape mode - i.e requesting a window that is HEIGHT pixels wide and WIDTH pixels high, where WIDTH and HEIGHT normally is 240 and 320 - the image is blitted so that the hardware buttons are on the left side of the display. This might not always be desirable but such is the code today. ============================================================================== V. Enjoy! :) If you have a project you'd like me to know about, or want to ask questions, go ahead and join the SDL developer's mailing list by sending e-mail to: sdl-request@libsdl.org and put "subscribe" into the subject of the message. Or alternatively you can use the web interface: http://www.libsdl.org/mailman/listinfo/sdl ============================================================================== VI. What is supported: Keyboard (Sharp Zaurus) Hardware buttons Stylus input (mouse) Video. Allows fullscreen both in portrait mode (up to WIDTHxHEIGHT size window) and in landscape mode (up to HEIGHTxWIDTH). All other SDL functionality works like a normal Linux system (threads, audio etc). -- David Hedbor <david@hedbor.org> http://david.hedbor.org/ http://eongames.com/