Mercurial > sdl-ios-xcode
view src/video/Xext/extensions/Xv.h @ 4167:a6f635e5eaa6 SDL-1.2
Fixed bug #611
From Tim Angus 2008-08-12 11:18:06
I'm one of the maintainers of ioquake3.org, an updated version of the
Quake 3 engine. Relatively recently, we moved ioq3 to use SDL as a
replacement for 95% of the platform specific code that was there. On the
whole it's doing a great job but unfortunately since the move we've been
getting complaints about the quality of the mouse input on the Windows
platform to the point where for many the game is unplayable. Put in
other terms, the current stable SDL 1.2 is basically not fit for purpose
if you need high quality mouse input as you do in a first person shooter.
Over the weekend I decided to pull my finger out and actually figure out
what's going on. There are basically two major problems. Firstly, when
using the "windib" driver, mouse input is gathered via the WM_MOUSEMOVE
message. Googling for this indicates that often this is known to result
in "spurious" and/or "missing" mouse movement events; this is the
primary cause of the poor mouse input. The second problem is that the
"directx" driver does not work at all in combination with OpenGL meaning
that you can't use DirectInput if your application also uses OpenGL. In
other words you're locked into using the "windib" driver and its poor
mouse input.
In order to address these problems I've done the following:
* Remove WM_MOUSEMOVE based motion event generation and replace with
calls to GetCursorPos which seems much more reliable. In order to
achieve this I've moved mouse motion out into a separate function that
is called once per DIB_PumpEvents.
* Remove the restriction on the "directx" driver being inoperable in
combination with OpenGL. There is a bug for this issues that I've
hijacked to a certain extent
(http://bugzilla.libsdl.org/show_bug.cgi?id=265). I'm the first to admit
I don't really understand why this restriction is there in the first
place. The commit message for the bug fix that introduced this
restriction (r581) isn't very elaborate and I couldn't see any other bug
tracking the issue. If anyone has more information on the bug that was
avoided by r581 it would be helpful as I/someone could then look into
addressing the problem without disabling the "directx" driver.
* I've also removed the restriction on not being allowed to use
DirectInput in windowed mode. I couldn't see any reason for this, at
least not from our perspective. I have my suspicions that it'll be
something like matching up the cursor with the mouse coordinates...
* I bumped up the DirectInput API used to version 7 in order to get
access to mouse buttons 4-7. I've had to inject a little bit of the DX7
headers into SDL there as the MinGW ones aren't up to date in this respect.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Thu, 02 Apr 2009 04:43:36 +0000 |
parents | eadc0746dfaf |
children | 782fd950bd46 |
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/*********************************************************** Copyright 1991 by Digital Equipment Corporation, Maynard, Massachusetts, and the Massachusetts Institute of Technology, Cambridge, Massachusetts. All Rights Reserved Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the names of Digital or MIT not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ******************************************************************/ /* $XFree86: xc/include/extensions/Xv.h,v 1.5 1999/12/11 19:28:48 mvojkovi Exp $ */ #ifndef XV_H #define XV_H /* ** File: ** ** Xv.h --- Xv shared library and server header file ** ** Author: ** ** David Carver (Digital Workstation Engineering/Project Athena) ** ** Revisions: ** ** 05.15.91 Carver ** - version 2.0 upgrade ** ** 01.24.91 Carver ** - version 1.4 upgrade ** */ #include <X11/X.h> #define XvName "XVideo" #define XvVersion 2 #define XvRevision 2 /* Symbols */ typedef XID XvPortID; typedef XID XvEncodingID; #define XvNone 0 #define XvInput 0 #define XvOutput 1 #define XvInputMask (1L<<XvInput) #define XvOutputMask (1L<<XvOutput) #define XvVideoMask 0x00000004 #define XvStillMask 0x00000008 #define XvImageMask 0x00000010 /* These two are not client viewable */ #define XvPixmapMask 0x00010000 #define XvWindowMask 0x00020000 #define XvGettable 0x01 #define XvSettable 0x02 #define XvRGB 0 #define XvYUV 1 #define XvPacked 0 #define XvPlanar 1 #define XvTopToBottom 0 #define XvBottomToTop 1 /* Events */ #define XvVideoNotify 0 #define XvPortNotify 1 #define XvNumEvents 2 /* Video Notify Reasons */ #define XvStarted 0 #define XvStopped 1 #define XvBusy 2 #define XvPreempted 3 #define XvHardError 4 #define XvLastReason 4 #define XvNumReasons (XvLastReason + 1) #define XvStartedMask (1L<<XvStarted) #define XvStoppedMask (1L<<XvStopped) #define XvBusyMask (1L<<XvBusy) #define XvPreemptedMask (1L<<XvPreempted) #define XvHardErrorMask (1L<<XvHardError) #define XvAnyReasonMask ((1L<<XvNumReasons) - 1) #define XvNoReasonMask 0 /* Errors */ #define XvBadPort 0 #define XvBadEncoding 1 #define XvBadControl 2 #define XvNumErrors 3 /* Status */ #define XvBadExtension 1 #define XvAlreadyGrabbed 2 #define XvInvalidTime 3 #define XvBadReply 4 #define XvBadAlloc 5 #endif /* XV_H */