438 lines
12 KiB
C
438 lines
12 KiB
C
/*
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* Minimal implementation of PanoramiX/Xinerama
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*
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* This is used in rootless mode where the underlying window server
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* already provides an abstracted view of multiple screens as one
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* large screen area.
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*
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* This code is largely based on panoramiX.c, which contains the
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* following copyright notice:
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*/
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/*****************************************************************
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Copyright (c) 1991, 1997 Digital Equipment Corporation, Maynard, Massachusetts.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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DIGITAL EQUIPMENT CORPORATION BE LIABLE FOR ANY CLAIM, DAMAGES, INCLUDING,
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BUT NOT LIMITED TO CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
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IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of Digital Equipment Corporation
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shall not be used in advertising or otherwise to promote the sale, use or other
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dealings in this Software without prior written authorization from Digital
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Equipment Corporation.
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******************************************************************/
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#include "pseudoramiX.h"
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#include <dix-config.h>
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#include "extnsionst.h"
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#include "dixstruct.h"
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#include "window.h"
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#include <X11/extensions/panoramiXproto.h>
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#include "globals.h"
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extern int noPseudoramiXExtension;
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extern int noPanoramiXExtension;
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extern int ProcPanoramiXQueryVersion (ClientPtr client);
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static void PseudoramiXResetProc(ExtensionEntry *extEntry);
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static int ProcPseudoramiXQueryVersion(ClientPtr client);
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static int ProcPseudoramiXGetState(ClientPtr client);
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static int ProcPseudoramiXGetScreenCount(ClientPtr client);
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static int ProcPseudoramiXGetScreenSize(ClientPtr client);
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static int ProcPseudoramiXIsActive(ClientPtr client);
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static int ProcPseudoramiXQueryScreens(ClientPtr client);
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static int ProcPseudoramiXDispatch(ClientPtr client);
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static int SProcPseudoramiXQueryVersion(ClientPtr client);
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static int SProcPseudoramiXGetState(ClientPtr client);
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static int SProcPseudoramiXGetScreenCount(ClientPtr client);
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static int SProcPseudoramiXGetScreenSize(ClientPtr client);
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static int SProcPseudoramiXIsActive(ClientPtr client);
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static int SProcPseudoramiXQueryScreens(ClientPtr client);
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static int SProcPseudoramiXDispatch(ClientPtr client);
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typedef struct {
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int x;
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int y;
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int w;
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int h;
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} PseudoramiXScreenRec;
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static PseudoramiXScreenRec *pseudoramiXScreens = NULL;
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static int pseudoramiXScreensAllocated = 0;
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static int pseudoramiXNumScreens = 0;
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static unsigned long pseudoramiXGeneration = 0;
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// Add a PseudoramiX screen.
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// The rest of the X server will know nothing about this screen.
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// Can be called before or after extension init.
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// Screens must be re-added once per generation.
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void
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PseudoramiXAddScreen(int x, int y, int w, int h)
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{
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PseudoramiXScreenRec *s;
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if (noPseudoramiXExtension) return;
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if (pseudoramiXNumScreens == pseudoramiXScreensAllocated) {
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pseudoramiXScreensAllocated += pseudoramiXScreensAllocated + 1;
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pseudoramiXScreens = xrealloc(pseudoramiXScreens,
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pseudoramiXScreensAllocated *
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sizeof(PseudoramiXScreenRec));
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}
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s = &pseudoramiXScreens[pseudoramiXNumScreens++];
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s->x = x;
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s->y = y;
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s->w = w;
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s->h = h;
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}
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// Initialize PseudoramiX.
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// Copied from PanoramiXExtensionInit
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void PseudoramiXExtensionInit(int argc, char *argv[])
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{
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Bool success = FALSE;
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ExtensionEntry *extEntry;
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if (noPseudoramiXExtension) return;
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/* Even with only one screen we need to enable PseudoramiX to allow
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dynamic screen configuration changes. */
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#if 0
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if (pseudoramiXNumScreens == 1) {
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// Only one screen - disable Xinerama extension.
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noPseudoramiXExtension = TRUE;
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return;
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}
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#endif
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// The server must not run the PanoramiX operations.
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noPanoramiXExtension = TRUE;
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if (pseudoramiXGeneration != serverGeneration) {
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extEntry = AddExtension(PANORAMIX_PROTOCOL_NAME, 0, 0,
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ProcPseudoramiXDispatch,
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SProcPseudoramiXDispatch,
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PseudoramiXResetProc,
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StandardMinorOpcode);
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if (!extEntry) {
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ErrorF("PseudoramiXExtensionInit(): AddExtension failed\n");
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} else {
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pseudoramiXGeneration = serverGeneration;
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success = TRUE;
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}
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}
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if (!success) {
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ErrorF("%s Extension (PseudoramiX) failed to initialize\n",
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PANORAMIX_PROTOCOL_NAME);
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return;
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}
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}
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void PseudoramiXResetScreens(void)
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{
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pseudoramiXNumScreens = 0;
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}
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static void PseudoramiXResetProc(ExtensionEntry *extEntry)
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{
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PseudoramiXResetScreens();
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}
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// was PanoramiX
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static int ProcPseudoramiXQueryVersion(ClientPtr client)
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{
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return ProcPanoramiXQueryVersion(client);
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}
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// was PanoramiX
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static int ProcPseudoramiXGetState(ClientPtr client)
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{
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REQUEST(xPanoramiXGetStateReq);
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WindowPtr pWin;
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xPanoramiXGetStateReply rep;
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register int n, rc;
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REQUEST_SIZE_MATCH(xPanoramiXGetStateReq);
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rc = dixLookupWindow(&pWin, stuff->window, client, DixUnknownAccess);
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if (rc != Success)
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return rc;
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rep.type = X_Reply;
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rep.length = 0;
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rep.sequenceNumber = client->sequence;
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rep.state = !noPseudoramiXExtension;
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if (client->swapped) {
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swaps (&rep.sequenceNumber, n);
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swapl (&rep.length, n);
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swaps (&rep.state, n);
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}
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WriteToClient (client, sizeof (xPanoramiXGetStateReply), (char *) &rep);
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return client->noClientException;
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}
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// was PanoramiX
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static int ProcPseudoramiXGetScreenCount(ClientPtr client)
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{
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REQUEST(xPanoramiXGetScreenCountReq);
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WindowPtr pWin;
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xPanoramiXGetScreenCountReply rep;
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register int n, rc;
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REQUEST_SIZE_MATCH(xPanoramiXGetScreenCountReq);
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rc = dixLookupWindow(&pWin, stuff->window, client, DixUnknownAccess);
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if (rc != Success)
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return rc;
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rep.type = X_Reply;
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rep.length = 0;
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rep.sequenceNumber = client->sequence;
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rep.ScreenCount = pseudoramiXNumScreens;
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if (client->swapped) {
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swaps (&rep.sequenceNumber, n);
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swapl (&rep.length, n);
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swaps (&rep.ScreenCount, n);
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}
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WriteToClient (client, sizeof(xPanoramiXGetScreenCountReply), (char *)&rep);
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return client->noClientException;
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}
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// was PanoramiX
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static int ProcPseudoramiXGetScreenSize(ClientPtr client)
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{
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REQUEST(xPanoramiXGetScreenSizeReq);
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WindowPtr pWin;
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xPanoramiXGetScreenSizeReply rep;
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register int n, rc;
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REQUEST_SIZE_MATCH(xPanoramiXGetScreenSizeReq);
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rc = dixLookupWindow(&pWin, stuff->window, client, DixUnknownAccess);
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if (rc != Success)
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return rc;
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rep.type = X_Reply;
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rep.length = 0;
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rep.sequenceNumber = client->sequence;
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/* screen dimensions */
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rep.width = pseudoramiXScreens[stuff->screen].w;
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// was panoramiXdataPtr[stuff->screen].width;
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rep.height = pseudoramiXScreens[stuff->screen].h;
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// was panoramiXdataPtr[stuff->screen].height;
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if (client->swapped) {
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swaps (&rep.sequenceNumber, n);
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swapl (&rep.length, n);
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swaps (&rep.width, n);
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swaps (&rep.height, n);
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}
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WriteToClient (client, sizeof(xPanoramiXGetScreenSizeReply), (char *)&rep);
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return client->noClientException;
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}
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// was Xinerama
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static int ProcPseudoramiXIsActive(ClientPtr client)
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{
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/* REQUEST(xXineramaIsActiveReq); */
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xXineramaIsActiveReply rep;
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REQUEST_SIZE_MATCH(xXineramaIsActiveReq);
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rep.type = X_Reply;
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rep.length = 0;
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rep.sequenceNumber = client->sequence;
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rep.state = !noPseudoramiXExtension;
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if (client->swapped) {
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register int n;
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swaps (&rep.sequenceNumber, n);
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swapl (&rep.length, n);
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swapl (&rep.state, n);
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}
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WriteToClient (client, sizeof (xXineramaIsActiveReply), (char *) &rep);
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return client->noClientException;
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}
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// was Xinerama
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static int ProcPseudoramiXQueryScreens(ClientPtr client)
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{
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/* REQUEST(xXineramaQueryScreensReq); */
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xXineramaQueryScreensReply rep;
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REQUEST_SIZE_MATCH(xXineramaQueryScreensReq);
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rep.type = X_Reply;
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rep.sequenceNumber = client->sequence;
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rep.number = noPseudoramiXExtension ? 0 : pseudoramiXNumScreens;
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rep.length = rep.number * sz_XineramaScreenInfo >> 2;
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if (client->swapped) {
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register int n;
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swaps (&rep.sequenceNumber, n);
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swapl (&rep.length, n);
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swapl (&rep.number, n);
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}
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WriteToClient (client, sizeof (xXineramaQueryScreensReply), (char *) &rep);
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if (!noPseudoramiXExtension) {
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xXineramaScreenInfo scratch;
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int i;
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for(i = 0; i < pseudoramiXNumScreens; i++) {
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scratch.x_org = pseudoramiXScreens[i].x;
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scratch.y_org = pseudoramiXScreens[i].y;
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scratch.width = pseudoramiXScreens[i].w;
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scratch.height = pseudoramiXScreens[i].h;
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if(client->swapped) {
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register int n;
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swaps (&scratch.x_org, n);
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swaps (&scratch.y_org, n);
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swaps (&scratch.width, n);
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swaps (&scratch.height, n);
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}
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WriteToClient (client, sz_XineramaScreenInfo, (char *) &scratch);
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}
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}
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return client->noClientException;
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}
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// was PanoramiX
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static int ProcPseudoramiXDispatch (ClientPtr client)
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{ REQUEST(xReq);
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switch (stuff->data)
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{
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case X_PanoramiXQueryVersion:
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return ProcPseudoramiXQueryVersion(client);
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case X_PanoramiXGetState:
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return ProcPseudoramiXGetState(client);
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case X_PanoramiXGetScreenCount:
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return ProcPseudoramiXGetScreenCount(client);
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case X_PanoramiXGetScreenSize:
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return ProcPseudoramiXGetScreenSize(client);
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case X_XineramaIsActive:
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return ProcPseudoramiXIsActive(client);
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case X_XineramaQueryScreens:
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return ProcPseudoramiXQueryScreens(client);
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}
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return BadRequest;
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}
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static int
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SProcPseudoramiXQueryVersion (ClientPtr client)
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{
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REQUEST(xPanoramiXQueryVersionReq);
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register int n;
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swaps(&stuff->length,n);
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REQUEST_SIZE_MATCH (xPanoramiXQueryVersionReq);
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return ProcPseudoramiXQueryVersion(client);
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}
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static int
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SProcPseudoramiXGetState(ClientPtr client)
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{
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REQUEST(xPanoramiXGetStateReq);
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register int n;
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swaps (&stuff->length, n);
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REQUEST_SIZE_MATCH(xPanoramiXGetStateReq);
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return ProcPseudoramiXGetState(client);
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}
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static int
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SProcPseudoramiXGetScreenCount(ClientPtr client)
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{
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REQUEST(xPanoramiXGetScreenCountReq);
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register int n;
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swaps (&stuff->length, n);
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REQUEST_SIZE_MATCH(xPanoramiXGetScreenCountReq);
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return ProcPseudoramiXGetScreenCount(client);
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}
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static int
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SProcPseudoramiXGetScreenSize(ClientPtr client)
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{
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REQUEST(xPanoramiXGetScreenSizeReq);
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register int n;
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swaps (&stuff->length, n);
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REQUEST_SIZE_MATCH(xPanoramiXGetScreenSizeReq);
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return ProcPseudoramiXGetScreenSize(client);
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}
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static int
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SProcPseudoramiXIsActive(ClientPtr client)
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{
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REQUEST(xXineramaIsActiveReq);
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register int n;
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swaps (&stuff->length, n);
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REQUEST_SIZE_MATCH(xXineramaIsActiveReq);
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return ProcPseudoramiXIsActive(client);
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}
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static int
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SProcPseudoramiXQueryScreens(ClientPtr client)
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{
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REQUEST(xXineramaQueryScreensReq);
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register int n;
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swaps (&stuff->length, n);
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REQUEST_SIZE_MATCH(xXineramaQueryScreensReq);
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return ProcPseudoramiXQueryScreens(client);
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}
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static int
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SProcPseudoramiXDispatch (ClientPtr client)
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{ REQUEST(xReq);
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switch (stuff->data)
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{
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case X_PanoramiXQueryVersion:
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return SProcPseudoramiXQueryVersion(client);
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case X_PanoramiXGetState:
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return SProcPseudoramiXGetState(client);
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case X_PanoramiXGetScreenCount:
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return SProcPseudoramiXGetScreenCount(client);
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case X_PanoramiXGetScreenSize:
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return SProcPseudoramiXGetScreenSize(client);
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case X_XineramaIsActive:
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return SProcPseudoramiXIsActive(client);
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case X_XineramaQueryScreens:
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return SProcPseudoramiXQueryScreens(client);
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}
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return BadRequest;
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}
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