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358 lines
9.3 KiB
C
358 lines
9.3 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 <dix-config.h>
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#include <X11/Xfuncproto.h>
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#include "dix/dix_priv.h"
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#include "dix/request_priv.h"
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#include "miext/extinit_priv.h"
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#include "pseudoramiX.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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#define TRACE LogMessageVerb(X_NONE, 10, "TRACE " __FILE__ ":%s", __func__)
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#define DEBUG_LOG(...) LogMessageVerb(X_NONE, 3, __VA_ARGS__);
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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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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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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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// 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 = reallocarray(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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extEntry = AddExtension(PANORAMIX_PROTOCOL_NAME, 0, 0,
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ProcPseudoramiXDispatch,
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ProcPseudoramiXDispatch,
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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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success = TRUE;
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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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ProcPseudoramiXGetState(ClientPtr client)
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{
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REQUEST(xPanoramiXGetStateReq);
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REQUEST_SIZE_MATCH(xPanoramiXGetStateReq);
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if (client->swapped)
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swapl(&stuff->window);
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WindowPtr pWin;
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register int rc;
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TRACE;
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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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xPanoramiXGetStateReply reply = {
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.state = !noPseudoramiXExtension,
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.window = stuff->window
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};
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if (client->swapped) {
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swapl(&reply.window);
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}
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return X_SEND_REPLY_SIMPLE(client, reply);
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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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REQUEST_SIZE_MATCH(xPanoramiXGetScreenCountReq);
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if (client->swapped)
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swapl(&stuff->window);
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WindowPtr pWin;
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register int rc;
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TRACE;
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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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xPanoramiXGetScreenCountReply reply = {
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.ScreenCount = pseudoramiXNumScreens,
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.window = stuff->window
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};
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if (client->swapped) {
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swapl(&reply.window);
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}
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return X_SEND_REPLY_SIMPLE(client, reply);
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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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REQUEST_SIZE_MATCH(xPanoramiXGetScreenSizeReq);
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if (client->swapped) {
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swapl(&stuff->window);
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swapl(&stuff->screen);
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}
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WindowPtr pWin;
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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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rc = dixLookupWindow(&pWin, stuff->window, client, DixGetAttrAccess);
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if (rc != Success)
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return rc;
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xPanoramiXGetScreenSizeReply reply = {
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.width = pseudoramiXScreens[stuff->screen].w,
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.height = pseudoramiXScreens[stuff->screen].h,
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.window = stuff->window,
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.screen = stuff->screen
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};
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if (client->swapped) {
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swapl(&reply.width);
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swapl(&reply.height);
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swapl(&reply.window);
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swapl(&reply.screen);
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}
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return X_SEND_REPLY_SIMPLE(client, reply);
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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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TRACE;
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REQUEST_SIZE_MATCH(xXineramaIsActiveReq);
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xXineramaIsActiveReply reply = {
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.state = !noPseudoramiXExtension
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};
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if (client->swapped) {
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swapl(&reply.state);
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}
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return X_SEND_REPLY_SIMPLE(client, reply);
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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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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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x_rpcbuf_t rpcbuf = { .swapped = client->swapped, .err_clear = TRUE };
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if (!noPseudoramiXExtension) {
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for (int i = 0; i < pseudoramiXNumScreens; i++) {
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/* xXineramaScreenInfo is the same as xRectangle */
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x_rpcbuf_write_rect(&rpcbuf,
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pseudoramiXScreens[i].x,
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pseudoramiXScreens[i].y,
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pseudoramiXScreens[i].w,
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pseudoramiXScreens[i].h);
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}
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}
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xXineramaQueryScreensReply reply = {
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.number = noPseudoramiXExtension ? 0 : pseudoramiXNumScreens
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};
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if (client->swapped)
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swapl(&reply.number);
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return X_SEND_REPLY_WITH_RPCBUF(client, reply, rpcbuf);
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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 ProcPanoramiXQueryVersion(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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