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/*
* Copyright 2007-2008 Peter Hutterer
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Author: Peter Hutterer, University of South Australia, NICTA
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "windowstr.h"
#include <X11/extensions/ge.h>
#include "geint.h"
#include "geext.h"
#include "protocol-versions.h"
#include "extinit.h"
DevPrivateKeyRec GEClientPrivateKeyRec;
GEExtension GEExtensions[MAXEXTENSIONS];
/* Major available requests */
static const int version_requests[] = {
X_GEQueryVersion, /* before client sends QueryVersion */
X_GEQueryVersion, /* must be set to last request in version 1 */
};
/* Forward declarations */
static void SGEGenericEvent(xEvent *from, xEvent *to);
#define NUM_VERSION_REQUESTS (sizeof (version_requests) / sizeof (version_requests[0]))
#define EXT_MASK(ext) ((ext) & 0x7F)
/************************************************************/
/* request handlers */
/************************************************************/
static int
ProcGEQueryVersion(ClientPtr client)
{
GEClientInfoPtr pGEClient = GEGetClient(client);
xGEQueryVersionReply rep;
REQUEST(xGEQueryVersionReq);
REQUEST_SIZE_MATCH(xGEQueryVersionReq);
rep = (xGEQueryVersionReply) {
.repType = X_Reply,
.RepType = X_GEQueryVersion,
.sequenceNumber = client->sequence,
.length = 0,
/* return the supported version by the server */
.majorVersion = SERVER_GE_MAJOR_VERSION,
.minorVersion = SERVER_GE_MINOR_VERSION
};
/* Remember version the client requested */
pGEClient->major_version = stuff->majorVersion;
pGEClient->minor_version = stuff->minorVersion;
if (client->swapped) {
swaps(&rep.sequenceNumber);
swapl(&rep.length);
swaps(&rep.majorVersion);
swaps(&rep.minorVersion);
}
WriteToClient(client, sizeof(xGEQueryVersionReply), &rep);
return Success;
}
static int (*ProcGEVector[GENumberRequests]) (ClientPtr) = {
/* Version 1.0 */
ProcGEQueryVersion,
};
/************************************************************/
/* swapped request handlers */
/************************************************************/
static int
SProcGEQueryVersion(ClientPtr client)
{
REQUEST(xGEQueryVersionReq);
swaps(&stuff->length);
REQUEST_SIZE_MATCH(xGEQueryVersionReq);
swaps(&stuff->majorVersion);
swaps(&stuff->minorVersion);
return (*ProcGEVector[stuff->ReqType]) (client);
}
static int (*SProcGEVector[GENumberRequests]) (ClientPtr) = {
/* Version 1.0 */
SProcGEQueryVersion
};
/************************************************************/
/* callbacks */
/************************************************************/
/* dispatch requests */
static int
ProcGEDispatch(ClientPtr client)
{
GEClientInfoPtr pGEClient = GEGetClient(client);
REQUEST(xGEReq);
if (pGEClient->major_version >= NUM_VERSION_REQUESTS)
return BadRequest;
if (stuff->ReqType > version_requests[pGEClient->major_version])
return BadRequest;
return (ProcGEVector[stuff->ReqType]) (client);
}
/* dispatch swapped requests */
static int
SProcGEDispatch(ClientPtr client)
{
REQUEST(xGEReq);
if (stuff->ReqType >= GENumberRequests)
return BadRequest;
return (*SProcGEVector[stuff->ReqType]) (client);
}
/* Reset extension. Called on server shutdown. */
static void
GEResetProc(ExtensionEntry * extEntry)
{
EventSwapVector[GenericEvent] = NotImplemented;
}
/* Calls the registered event swap function for the extension.
*
* Each extension can register a swap function to handle GenericEvents being
* swapped properly. The server calls SGEGenericEvent() before the event is
* written on the wire, this one calls the registered swap function to do the
* work.
*/
static void
SGEGenericEvent(xEvent *from, xEvent *to)
{
xGenericEvent *gefrom = (xGenericEvent *) from;
xGenericEvent *geto = (xGenericEvent *) to;
if ((gefrom->extension & 0x7f) > MAXEXTENSIONS) {
ErrorF("GE: Invalid extension offset for event.\n");
return;
}
if (GEExtensions[EXT_MASK(gefrom->extension)].evswap)
GEExtensions[EXT_MASK(gefrom->extension)].evswap(gefrom, geto);
}
/* Init extension, register at server.
* Since other extensions may rely on XGE (XInput does already), it is a good
* idea to init XGE first, before any other extension.
*/
void
GEExtensionInit(void)
{
ExtensionEntry *extEntry;
if (!dixRegisterPrivateKey
(&GEClientPrivateKeyRec, PRIVATE_CLIENT, sizeof(GEClientInfoRec)))
FatalError("GEExtensionInit: GE private request failed.\n");
if ((extEntry = AddExtension(GE_NAME,
0, GENumberErrors,
ProcGEDispatch, SProcGEDispatch,
GEResetProc, StandardMinorOpcode)) != 0) {
memset(GEExtensions, 0, sizeof(GEExtensions));
EventSwapVector[GenericEvent] = (EventSwapPtr) SGEGenericEvent;
}
else {
FatalError("GEInit: AddExtensions failed.\n");
}
}
/************************************************************/
/* interface for extensions */
/************************************************************/
/* Register an extension with GE. The given swap function will be called each
* time an event is sent to a client with different byte order.
* @param extension The extensions major opcode
* @param ev_swap The event swap function.
* @param ev_fill Called for an event before delivery. The extension now has
* the chance to fill in necessary fields for the event.
*/
void
GERegisterExtension(int extension,
void (*ev_swap) (xGenericEvent *from, xGenericEvent *to))
{
if (EXT_MASK(extension) >= MAXEXTENSIONS)
FatalError("GE: extension > MAXEXTENSIONS. This should not happen.\n");
/* extension opcodes are > 128, might as well save some space here */
GEExtensions[EXT_MASK(extension)].evswap = ev_swap;
}
/* Sets type and extension field for a generic event. This is just an
* auxiliary function, extensions could do it manually too.
*/
void
GEInitEvent(xGenericEvent *ev, int extension)
{
ev->type = GenericEvent;
ev->extension = extension;
ev->length = 0;
}
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