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view src/video/Xext/extensions/xf86dga1.h @ 4167:a6f635e5eaa6 SDL-1.2

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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 585a7e1285ae
children 782fd950bd46 c121d94672cb
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line source

/* $XFree86: xc/include/extensions/xf86dga1.h,v 1.2 1999/04/17 07:05:41 dawes Exp $ */
/*

Copyright (c) 1995  Jon Tombs
Copyright (c) 1995  XFree86 Inc

*/

/************************************************************************

   THIS IS THE OLD DGA API AND IS OBSOLETE.  PLEASE DO NOT USE IT ANYMORE

************************************************************************/

#ifndef _XF86DGA1_H_
#define _XF86DGA1_H_

#include <X11/Xfuncproto.h>
#include "SDL_name.h"

#define X_XF86DGAQueryVersion		0
#define X_XF86DGAGetVideoLL		1
#define X_XF86DGADirectVideo		2
#define X_XF86DGAGetViewPortSize	3
#define X_XF86DGASetViewPort		4
#define X_XF86DGAGetVidPage		5
#define X_XF86DGASetVidPage		6
#define X_XF86DGAInstallColormap	7
#define X_XF86DGAQueryDirectVideo	8
#define X_XF86DGAViewPortChanged	9

#define XF86DGADirectPresent		0x0001
#define XF86DGADirectGraphics		0x0002
#define XF86DGADirectMouse		0x0004
#define XF86DGADirectKeyb		0x0008
#define XF86DGAHasColormap		0x0100
#define XF86DGADirectColormap		0x0200




#ifndef _XF86DGA_SERVER_

_XFUNCPROTOBEGIN

Bool SDL_NAME(XF86DGAQueryVersion)(
#if NeedFunctionPrototypes
    Display*		/* dpy */,
    int*		/* majorVersion */,
    int*		/* minorVersion */
#endif
);

Bool SDL_NAME(XF86DGAQueryExtension)(
#if NeedFunctionPrototypes
    Display*		/* dpy */,
    int*		/* event_base */,
    int*		/* error_base */
#endif
);

Status SDL_NAME(XF86DGAGetVideoLL)(
#if NeedFunctionPrototypes
    Display*			/* dpy */,
    int				/* screen */,
    int *			/* base addr */,
    int *			/* width */,
    int *			/* bank_size */,
    int *			/* ram_size */ 
#endif
);

Status SDL_NAME(XF86DGAGetVideo)(
#if NeedFunctionPrototypes
    Display*			/* dpy */,
    int				/* screen */,
    char **			/* base addr */,
    int *			/* width */,
    int *			/* bank_size */,
    int *			/* ram_size */
#endif
);

Status SDL_NAME(XF86DGADirectVideo)(
#if NeedFunctionPrototypes
    Display*			/* dpy */,
    int				/* screen */,
    int 			/* enable */
#endif
);

Status SDL_NAME(XF86DGADirectVideoLL)(
#if NeedFunctionPrototypes
    Display*			/* dpy */,
    int				/* screen */,
    int 			/* enable */
#endif
);

Status SDL_NAME(XF86DGAGetViewPortSize)(
#if NeedFunctionPrototypes
    Display*			/* dpy */,
    int				/* screen */,
    int *			/* width */,
    int *			/* height */
#endif
);

Status SDL_NAME(XF86DGASetViewPort)(
#if NeedFunctionPrototypes
    Display*			/* dpy */,
    int				/* screen */,
    int x			/* X */,
    int y			/* Y */
#endif
);

Status SDL_NAME(XF86DGAGetVidPage)(
#if NeedFunctionPrototypes
    Display*			/* dpy */,
    int				/* screen */,
    int *			/* vid page */
#endif
);

Status SDL_NAME(XF86DGASetVidPage)(
#if NeedFunctionPrototypes
    Display*			/* dpy */,
    int				/* screen */,
    int				/* vid page */
#endif
);

Status SDL_NAME(XF86DGAInstallColormap)(
#if NeedFunctionPrototypes
    Display*			/* dpy */,
    int				/* screen */,
    Colormap			/*Colormap */
#endif
);

int SDL_NAME(XF86DGAForkApp)(
#if NeedFunctionPrototypes
    int screen
#endif
);

Status SDL_NAME(XF86DGAQueryDirectVideo)(
#if NeedFunctionPrototypes
    Display *		/* dpy */,
    int			/* screen */,
    int *		/* flags */
#endif
);

Bool SDL_NAME(XF86DGAViewPortChanged)(
#if NeedFunctionPrototypes
    Display *		/* dpy */,
    int			/* screen */,
    int			/* n */
#endif
);


_XFUNCPROTOEND

#endif /* _XF86DGA_SERVER_ */

#endif /* _XF86DGA1_H_ */