xenocara/xserver/hw/dmx/glxProxy/glxscreens.c

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/*
* SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
* Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
*
* 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 including the dates of first publication and
* either this permission notice or a reference to
* http://oss.sgi.com/projects/FreeB/
* 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
* SILICON GRAPHICS, INC. 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.
*
* Except as contained in this notice, the name of Silicon Graphics, Inc.
* shall not be used in advertising or otherwise to promote the sale, use or
* other dealings in this Software without prior written authorization from
* Silicon Graphics, Inc.
*/
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#ifdef HAVE_DMX_CONFIG_H
#include <dmx-config.h>
#endif
#include "dmx.h"
#include "dmxlog.h"
#include "glxserver.h"
#include <windowstr.h>
#include "glxfbconfig.h"
#ifdef PANORAMIX
#include "panoramiXsrv.h"
#endif
__GLXscreenInfo *__glXActiveScreens;
GLint __glXNumActiveScreens;
__GLXFBConfig **__glXFBConfigs;
int __glXNumFBConfigs;
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static char GLXServerVendorName[] = "SGI DMX/glxProxy";
static char GLXServerVersion[64];
static char GLXServerExtensions[] =
"GLX_EXT_visual_info "
"GLX_EXT_visual_rating "
"GLX_EXT_import_context "
"GLX_SGIX_fbconfig " "GLX_SGI_make_current_read " "GLX_SGI_swap_control ";
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static char ExtensionsString[1024];
static void
CalcServerVersionAndExtensions(void)
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{
int s;
char **be_extensions;
char *ext;
char *denied_extensions;
/*
* set the server glx version to be the minimum version
* supported by all back-end servers
*/
__glXVersionMajor = 0;
__glXVersionMinor = 0;
for (s = 0; s < __glXNumActiveScreens; s++) {
DMXScreenInfo *dmxScreen = &dmxScreens[s];
Display *dpy = dmxScreen->beDisplay;
xGLXQueryVersionReq *req;
xGLXQueryVersionReply reply;
/* Send the glXQueryVersion request */
LockDisplay(dpy);
GetReq(GLXQueryVersion, req);
req->reqType = dmxScreen->glxMajorOpcode;
req->glxCode = X_GLXQueryVersion;
req->majorVersion = GLX_SERVER_MAJOR_VERSION;
req->minorVersion = GLX_SERVER_MINOR_VERSION;
_XReply(dpy, (xReply *) &reply, 0, False);
UnlockDisplay(dpy);
SyncHandle();
if (s == 0) {
__glXVersionMajor = reply.majorVersion;
__glXVersionMinor = reply.minorVersion;
}
else {
if (reply.majorVersion < __glXVersionMajor) {
__glXVersionMajor = reply.majorVersion;
__glXVersionMinor = reply.minorVersion;
}
else if ((reply.majorVersion == __glXVersionMajor) &&
(reply.minorVersion < __glXVersionMinor)) {
__glXVersionMinor = reply.minorVersion;
}
}
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}
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if (GLX_SERVER_MAJOR_VERSION < __glXVersionMajor) {
__glXVersionMajor = GLX_SERVER_MAJOR_VERSION;
__glXVersionMinor = GLX_SERVER_MINOR_VERSION;
}
else if ((GLX_SERVER_MAJOR_VERSION == __glXVersionMajor) &&
(GLX_SERVER_MINOR_VERSION < __glXVersionMinor)) {
__glXVersionMinor = GLX_SERVER_MINOR_VERSION;
}
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snprintf(GLXServerVersion, sizeof(GLXServerVersion),
"%d.%d DMX %d back-end server(s)",
__glXVersionMajor, __glXVersionMinor, __glXNumActiveScreens);
/*
* set the ExtensionsString to the minimum extensions string
*/
ExtensionsString[0] = '\0';
/*
* read extensions strings of all back-end servers
*/
be_extensions = xallocarray(__glXNumActiveScreens, sizeof(char *));
if (!be_extensions)
return;
for (s = 0; s < __glXNumActiveScreens; s++) {
DMXScreenInfo *dmxScreen = &dmxScreens[s];
Display *dpy = dmxScreen->beDisplay;
xGLXQueryServerStringReq *req;
xGLXQueryServerStringReply reply;
int length, numbytes;
/* Send the glXQueryServerString request */
LockDisplay(dpy);
GetReq(GLXQueryServerString, req);
req->reqType = dmxScreen->glxMajorOpcode;
req->glxCode = X_GLXQueryServerString;
req->screen = DefaultScreen(dpy);
req->name = GLX_EXTENSIONS;
_XReply(dpy, (xReply *) &reply, 0, False);
length = (int) reply.length;
numbytes = (int) reply.n;
be_extensions[s] = (char *) malloc(numbytes);
if (!be_extensions[s]) {
/* Throw data on the floor */
_XEatDataWords(dpy, length);
}
else {
_XReadPad(dpy, (char *) be_extensions[s], numbytes);
}
UnlockDisplay(dpy);
SyncHandle();
}
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/*
* extensions string will include only extensions that our
* server supports as well as all back-end servers supports.
* extensions that are in the DMX_DENY_EXTENSIONS string will
* not be supported.
*/
denied_extensions = getenv("DMX_DENY_GLX_EXTENSIONS");
ext = strtok(GLXServerExtensions, " ");
while (ext) {
int supported = 1;
if (denied_extensions && strstr(denied_extensions, ext)) {
supported = 0;
}
else {
for (s = 0; s < __glXNumActiveScreens && supported; s++) {
if (!strstr(be_extensions[s], ext)) {
supported = 0;
}
}
}
if (supported) {
strcat(ExtensionsString, ext);
strcat(ExtensionsString, " ");
}
ext = strtok(NULL, " ");
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}
/*
* release temporary storage
*/
for (s = 0; s < __glXNumActiveScreens; s++) {
free(be_extensions[s]);
}
free(be_extensions);
if (dmxGLXSwapGroupSupport) {
if (!denied_extensions ||
!strstr(denied_extensions, "GLX_SGIX_swap_group")) {
strcat(ExtensionsString, "GLX_SGIX_swap_group");
if (!denied_extensions ||
!strstr(denied_extensions, "GLX_SGIX_swap_barrier")) {
strcat(ExtensionsString, " GLX_SGIX_swap_barrier");
}
}
}
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}
void
__glXScreenInit(GLint numscreens)
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{
int s;
int c;
DMXScreenInfo *dmxScreen0 = &dmxScreens[0];
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__glXNumActiveScreens = numscreens;
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CalcServerVersionAndExtensions();
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__glXFBConfigs = NULL;
__glXNumFBConfigs = 0;
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if ((__glXVersionMajor == 1 && __glXVersionMinor >= 3) ||
(__glXVersionMajor > 1) ||
(strstr(ExtensionsString, "GLX_SGIX_fbconfig"))) {
/*
// Initialize FBConfig info.
// find the set of FBConfigs that are present on all back-end
// servers - only those configs will be supported
*/
__glXFBConfigs =
xallocarray(dmxScreen0->numFBConfigs * (numscreens + 1),
sizeof(__GLXFBConfig *));
__glXNumFBConfigs = 0;
for (c = 0; c < dmxScreen0->numFBConfigs; c++) {
__GLXFBConfig *cfg = NULL;
if (numscreens > 1) {
for (s = 1; s < numscreens; s++) {
DMXScreenInfo *dmxScreen = &dmxScreens[s];
cfg = FindMatchingFBConfig(&dmxScreen0->fbconfigs[c],
dmxScreen->fbconfigs,
dmxScreen->numFBConfigs);
__glXFBConfigs[__glXNumFBConfigs * (numscreens + 1) + s +
1] = cfg;
if (!cfg) {
dmxLog(dmxInfo,
"screen0 FBConfig 0x%x is missing on screen#%d\n",
dmxScreen0->fbconfigs[c].id, s);
break;
}
else {
dmxLog(dmxInfo,
"screen0 FBConfig 0x%x matched to 0x%x on screen#%d\n",
dmxScreen0->fbconfigs[c].id, cfg->id, s);
}
}
}
else {
cfg = &dmxScreen0->fbconfigs[c];
}
if (cfg) {
/* filter out overlay visuals */
if (cfg->level == 0) {
__GLXFBConfig *proxy_cfg;
__glXFBConfigs[__glXNumFBConfigs * (numscreens + 1) + 1] =
&dmxScreen0->fbconfigs[c];
proxy_cfg = malloc(sizeof(__GLXFBConfig));
memcpy(proxy_cfg, cfg, sizeof(__GLXFBConfig));
proxy_cfg->id = FakeClientID(0);
/* visual will be associated later in __glXGetFBConfigs */
proxy_cfg->associatedVisualId = (unsigned int) -1;
__glXFBConfigs[__glXNumFBConfigs * (numscreens + 1) + 0] =
proxy_cfg;
__glXNumFBConfigs++;
}
}
}
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}
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}
void
__glXScreenReset(void)
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{
__glXNumActiveScreens = 0;
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}
char *
__glXGetServerString(unsigned int name)
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{
char *ret = NULL;
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switch (name) {
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case GLX_VENDOR:
ret = GLXServerVendorName;
break;
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case GLX_VERSION:
ret = GLXServerVersion;
break;
case GLX_EXTENSIONS:
ret = ExtensionsString;
break;
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default:
break;
}
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return ret;
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}
int
glxIsExtensionSupported(const char *ext)
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{
return (strstr(ExtensionsString, ext) != NULL);
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}