95e83ff87a
Prevent RRXinerama from activating if PseudoramiX is, so we don't get XINERAMA listed twice in the list of extensions. I think this is otherwise benign, as the PseudoramiX XINERAMA gets registered first and thus handles all requests. Perhaps AddExtension() ought to warn us if the extension name is already registered? This appears to be a long-standing bug seen in XQuartz, and now in XWin as well. Future work: Perhaps since RRXinerama isn't actually doing anything useful but faking it when we have one screen, it seems that the PseudoramiX code could be also used in that case. Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk> Reviewed-by: Colin Harrison <colin.harrison@virgin.net>
529 lines
14 KiB
C
529 lines
14 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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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include "pseudoramiX.h"
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#include "extnsionst.h"
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#include "nonsdk_extinit.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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#define TRACE PseudoramiXTrace("TRACE " __FILE__ ":%s",__FUNCTION__)
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#define DEBUG_LOG PseudoramiXDebug
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Bool noPseudoramiXExtension = FALSE;
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extern Bool noRRXineramaExtension;
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extern int
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ProcPanoramiXQueryVersion(ClientPtr client);
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static void
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PseudoramiXResetProc(ExtensionEntry *extEntry);
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static int
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ProcPseudoramiXQueryVersion(ClientPtr client);
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static int
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ProcPseudoramiXGetState(ClientPtr client);
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static int
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ProcPseudoramiXGetScreenCount(ClientPtr client);
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static int
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ProcPseudoramiXGetScreenSize(ClientPtr client);
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static int
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ProcPseudoramiXIsActive(ClientPtr client);
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static int
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ProcPseudoramiXQueryScreens(ClientPtr client);
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static int
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ProcPseudoramiXDispatch(ClientPtr client);
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static int
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SProcPseudoramiXQueryVersion(ClientPtr client);
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static int
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SProcPseudoramiXGetState(ClientPtr client);
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static int
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SProcPseudoramiXGetScreenCount(ClientPtr client);
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static int
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SProcPseudoramiXGetScreenSize(ClientPtr client);
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static int
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SProcPseudoramiXIsActive(ClientPtr client);
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static int
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SProcPseudoramiXQueryScreens(ClientPtr client);
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static int
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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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static void
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PseudoramiXTrace(const char *format, ...)
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_X_ATTRIBUTE_PRINTF(1, 2);
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static void
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PseudoramiXTrace(const char *format, ...)
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{
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va_list ap;
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va_start(ap, format);
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LogVMessageVerb(X_NONE, 10, format, ap);
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va_end(ap);
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}
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static void
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PseudoramiXDebug(const char *format, ...)
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_X_ATTRIBUTE_PRINTF(1, 2);
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static void
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PseudoramiXDebug(const char *format, ...)
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{
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va_list ap;
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va_start(ap, format);
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LogVMessageVerb(X_NONE, 3, format, ap);
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va_end(ap);
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}
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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 = realloc(pseudoramiXScreens,
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pseudoramiXScreensAllocated *
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sizeof(PseudoramiXScreenRec));
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}
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DEBUG_LOG("x: %d, y: %d, w: %d, h: %d\n", x, y, w, h);
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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
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PseudoramiXExtensionInit(void)
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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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TRACE;
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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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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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}
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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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/* Do not allow RRXinerama to initialize if we did */
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noRRXineramaExtension = success;
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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
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PseudoramiXResetScreens(void)
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{
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TRACE;
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pseudoramiXNumScreens = 0;
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}
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static void
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PseudoramiXResetProc(ExtensionEntry *extEntry)
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{
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TRACE;
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PseudoramiXResetScreens();
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}
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// was PanoramiX
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static int
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ProcPseudoramiXQueryVersion(ClientPtr client)
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{
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TRACE;
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return ProcPanoramiXQueryVersion(client);
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}
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// was PanoramiX
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static int
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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 rc;
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TRACE;
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REQUEST_SIZE_MATCH(xPanoramiXGetStateReq);
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rc = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess);
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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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rep.window = stuff->window;
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if (client->swapped) {
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swaps(&rep.sequenceNumber);
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swapl(&rep.length);
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swapl(&rep.window);
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}
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WriteToClient(client, sizeof(xPanoramiXGetStateReply),&rep);
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return Success;
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}
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// was PanoramiX
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static int
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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 rc;
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TRACE;
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REQUEST_SIZE_MATCH(xPanoramiXGetScreenCountReq);
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rc = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess);
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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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rep.window = stuff->window;
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if (client->swapped) {
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swaps(&rep.sequenceNumber);
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swapl(&rep.length);
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swapl(&rep.window);
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}
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WriteToClient(client, sizeof(xPanoramiXGetScreenCountReply),&rep);
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return Success;
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}
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// was PanoramiX
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static int
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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 rc;
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TRACE;
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if (stuff->screen >= pseudoramiXNumScreens)
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return BadMatch;
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REQUEST_SIZE_MATCH(xPanoramiXGetScreenSizeReq);
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rc = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess);
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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 screenInfo.screens[stuff->screen]->width;
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rep.height = pseudoramiXScreens[stuff->screen].h;
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// was screenInfo.screens[stuff->screen]->height;
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rep.window = stuff->window;
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rep.screen = stuff->screen;
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if (client->swapped) {
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swaps(&rep.sequenceNumber);
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swapl(&rep.length);
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swapl(&rep.width);
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swapl(&rep.height);
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swapl(&rep.window);
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swapl(&rep.screen);
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}
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WriteToClient(client, sizeof(xPanoramiXGetScreenSizeReply),&rep);
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return Success;
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}
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// was Xinerama
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static int
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ProcPseudoramiXIsActive(ClientPtr client)
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{
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/* REQUEST(xXineramaIsActiveReq); */
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xXineramaIsActiveReply rep;
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TRACE;
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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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swaps(&rep.sequenceNumber);
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swapl(&rep.length);
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swapl(&rep.state);
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}
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WriteToClient(client, sizeof(xXineramaIsActiveReply),&rep);
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return Success;
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}
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// was Xinerama
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static int
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ProcPseudoramiXQueryScreens(ClientPtr client)
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{
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/* REQUEST(xXineramaQueryScreensReq); */
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xXineramaQueryScreensReply rep;
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DEBUG_LOG("noPseudoramiXExtension=%d, pseudoramiXNumScreens=%d\n",
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noPseudoramiXExtension,
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pseudoramiXNumScreens);
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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 = bytes_to_int32(rep.number * sz_XineramaScreenInfo);
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if (client->swapped) {
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swaps(&rep.sequenceNumber);
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swapl(&rep.length);
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swapl(&rep.number);
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}
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WriteToClient(client, sizeof(xXineramaQueryScreensReply),&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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swaps(&scratch.x_org);
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swaps(&scratch.y_org);
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swaps(&scratch.width);
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swaps(&scratch.height);
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}
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WriteToClient(client, sz_XineramaScreenInfo,&scratch);
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}
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}
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return Success;
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}
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// was PanoramiX
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static int
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ProcPseudoramiXDispatch(ClientPtr client)
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{
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REQUEST(xReq);
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TRACE;
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switch (stuff->data) {
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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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TRACE;
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swaps(&stuff->length);
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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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TRACE;
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swaps(&stuff->length);
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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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TRACE;
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swaps(&stuff->length);
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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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TRACE;
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swaps(&stuff->length);
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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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TRACE;
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swaps(&stuff->length);
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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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TRACE;
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swaps(&stuff->length);
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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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{
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REQUEST(xReq);
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TRACE;
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switch (stuff->data) {
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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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