view src/video/Xext/extensions/panoramiXproto.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
line wrap: on
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/* $Xorg: panoramiXproto.h,v 1.4 2000/08/18 04:05:45 coskrey Exp $ */
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/* $XFree86: xc/include/extensions/panoramiXproto.h,v 3.6 2001/01/17 17:53:22 dawes Exp $ */

/* THIS IS NOT AN X PROJECT TEAM SPECIFICATION */

#ifndef _PANORAMIXPROTO_H_
#define _PANORAMIXPROTO_H_

#define PANORAMIX_PROTOCOL_NAME "XINERAMA"

#define X_PanoramiXQueryVersion		0
#define X_PanoramiXGetState		1
#define X_PanoramiXGetScreenCount	2
#define X_PanoramiXGetScreenSize	3

#define X_XineramaIsActive		4
#define X_XineramaQueryScreens		5

typedef struct _PanoramiXQueryVersion {
	CARD8	reqType;		/* always PanoramiXReqCode */
	CARD8	panoramiXReqType;	/* always X_PanoramiXQueryVersion */
	CARD16	length B16;
	CARD8	clientMajor;
	CARD8	clientMinor;
	CARD16	unused B16;           
} xPanoramiXQueryVersionReq;

#define sz_xPanoramiXQueryVersionReq	8

typedef struct {
	CARD8	type;			/* must be X_Reply */
	CARD8	pad1;			/* unused	*/
	CARD16	sequenceNumber  B16;	/* last sequence number */
	CARD32	length  B32;		/* 0 */
	CARD16	majorVersion  B16;	
	CARD16	minorVersion  B16;	
	CARD32	pad2	B32;		/* unused */
	CARD32	pad3	B32;		/* unused */
	CARD32	pad4	B32;		/* unused */
	CARD32	pad5	B32;		/* unused */
	CARD32	pad6	B32;		/* unused */
} xPanoramiXQueryVersionReply;

#define sz_xPanoramiXQueryVersionReply	32


typedef	struct	_PanoramiXGetState {
        CARD8   reqType;	        /* always PanoramiXReqCode */
        CARD8   panoramiXReqType;    	/* always X_PanoramiXGetState */
        CARD16  length B16;
	CARD32  window B32;
} xPanoramiXGetStateReq;
#define sz_xPanoramiXGetStateReq	8	

typedef struct {
	BYTE	type;
	BYTE	state;
	CARD16	sequenceNumber B16;
	CARD32	length	B32;
	CARD32  window  B32;
	CARD32	pad1	B32;		/* unused */
	CARD32	pad2	B32;		/* unused */
	CARD32	pad3	B32;		/* unused */
	CARD32	pad4	B32;		/* unused */
	CARD32	pad5	B32;		/* unused */
} xPanoramiXGetStateReply;

#define sz_panoramiXGetStateReply	32

typedef	struct	_PanoramiXGetScreenCount {
        CARD8   reqType;             /* always PanoramiXReqCode */
        CARD8   panoramiXReqType;    /* always X_PanoramiXGetScreenCount */
        CARD16  length B16;
	CARD32  window B32;
} xPanoramiXGetScreenCountReq;
#define sz_xPanoramiXGetScreenCountReq	8

typedef struct {
	BYTE	type;
	BYTE	ScreenCount;
	CARD16	sequenceNumber B16;
	CARD32	length B32;
	CARD32  window  B32;
	CARD32	pad1	B32;		/* unused */
	CARD32	pad2	B32;		/* unused */
	CARD32	pad3	B32;		/* unused */
	CARD32	pad4	B32;		/* unused */
	CARD32	pad5	B32;		/* unused */
} xPanoramiXGetScreenCountReply;
#define sz_panoramiXGetScreenCountReply	32

typedef	struct	_PanoramiXGetScreenSize {
        CARD8   reqType;                /* always PanoramiXReqCode */
        CARD8   panoramiXReqType;	/* always X_PanoramiXGetState */
        CARD16  length B16;
	CARD32  window B32;
	CARD32	screen B32;
} xPanoramiXGetScreenSizeReq;
#define sz_xPanoramiXGetScreenSizeReq	12	

typedef struct {
	BYTE	type;
	CARD8	pad1;			
	CARD16	sequenceNumber B16;
	CARD32	length	B32;
	CARD32	width	B32;
	CARD32	height	B32;
	CARD32  window  B32;
	CARD32  screen  B32;
	CARD32	pad2	B32;		/* unused */
	CARD32	pad3	B32;		/* unused */
} xPanoramiXGetScreenSizeReply;
#define sz_panoramiXGetScreenSizeReply 32	

/************  Alternate protocol  ******************/

typedef struct {
        CARD8   reqType;
        CARD8   panoramiXReqType;
        CARD16  length B16;
} xXineramaIsActiveReq;
#define sz_xXineramaIsActiveReq 4

typedef struct {
	BYTE	type;
	CARD8	pad1;			
	CARD16	sequenceNumber B16;
	CARD32	length	B32;
	CARD32	state	B32;
	CARD32	pad2	B32;
	CARD32  pad3  	B32;
	CARD32  pad4  	B32;
	CARD32	pad5	B32;
	CARD32	pad6	B32;
} xXineramaIsActiveReply;
#define sz_XineramaIsActiveReply 32	


typedef struct {
        CARD8   reqType;
        CARD8   panoramiXReqType;
        CARD16  length B16;
} xXineramaQueryScreensReq;
#define sz_xXineramaQueryScreensReq 4

typedef struct {
	BYTE	type;
	CARD8	pad1;			
	CARD16	sequenceNumber B16;
	CARD32	length	B32;
	CARD32	number	B32;
	CARD32	pad2	B32;
	CARD32  pad3  	B32;
	CARD32  pad4  	B32;
	CARD32	pad5	B32;
	CARD32	pad6	B32;
} xXineramaQueryScreensReply;
#define sz_XineramaQueryScreensReply 32	

typedef struct {
	INT16   x_org   B16;
	INT16   y_org   B16;
	CARD16  width   B16;
	CARD16  height  B16;
} xXineramaScreenInfo;
#define sz_XineramaScreenInfo 8

#endif