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+/* $XFree86: xc/programs/Xserver/GL/glx/glxscreens.c,v 1.6 2001/03/21 16:29:36 dawes Exp $ */
+/*
+** License Applicability. Except to the extent portions of this file are
+** made subject to an alternative license as permitted in the SGI Free
+** Software License B, Version 1.1 (the "License"), the contents of this
+** file are subject only to the provisions of the License. You may not use
+** this file except in compliance with the License. You may obtain a copy
+** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+**
+** http://oss.sgi.com/projects/FreeB
+**
+** Note that, as provided in the License, the Software is distributed on an
+** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+**
+** Original Code. The Original Code is: OpenGL Sample Implementation,
+** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+** Copyright in any portions created by third parties is as indicated
+** elsewhere herein. All Rights Reserved.
+**
+** Additional Notice Provisions: The application programming interfaces
+** established by SGI in conjunction with the Original Code are The
+** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+** Window System(R) (Version 1.3), released October 19, 1998. This software
+** was created using the OpenGL(R) version 1.2.1 Sample Implementation
+** published by SGI, but has not been independently verified as being
+** compliant with the OpenGL(R) version 1.2.1 Specification.
+**
+*/
+
+#ifdef HAVE_DMX_CONFIG_H
+#include <dmx-config.h>
+#endif
+
+#include "dmx.h"
+#include "dmxlog.h"
+
+#undef Xmalloc
+#undef Xcalloc
+#undef Xrealloc
+#undef Xfree
+
+#include "glxserver.h"
+
+#ifdef IN_MODULE
+#include <xf86_ansic.h>
+#else
+#include <string.h>
+#include <signal.h>
+#endif
+
+#include <windowstr.h>
+
+#include "glxfbconfig.h"
+
+#ifdef PANORAMIX
+#include "panoramiXsrv.h"
+#endif
+
+__GLXscreenInfo *__glXActiveScreens;
+GLint __glXNumActiveScreens;
+
+__GLXFBConfig **__glXFBConfigs;
+int __glXNumFBConfigs;
+
+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 "
+ ;
+
+static char ExtensionsString[1024];
+
+static void CalcServerVersionAndExtensions( void )
+{
+ int s;
+ xGLXQueryVersionReq *req;
+ xGLXQueryVersionReply reply;
+ 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;
+
+ /* 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;
+ }
+ }
+
+ }
+
+ 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;
+ }
+
+ sprintf(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 = (char **)Xalloc( __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, slop;
+
+ /* 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;
+ slop = numbytes * __GLX_SIZE_INT8 & 3;
+ be_extensions[s] = (char *)Xalloc(numbytes);
+ if (!be_extensions[s]) {
+ /* Throw data on the floor */
+ _XEatData(dpy, length);
+ } else {
+ _XRead(dpy, (char *)be_extensions[s], numbytes);
+ if (slop) _XEatData(dpy,4-slop);
+ }
+ UnlockDisplay(dpy);
+ SyncHandle();
+ }
+
+ /*
+ * 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, " ");
+ }
+
+ /*
+ * release temporary storage
+ */
+ for (s=0; s<__glXNumActiveScreens; s++) {
+ if (be_extensions[s]) Xfree(be_extensions[s]);
+ }
+ Xfree( 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");
+ }
+ }
+ }
+
+}
+
+void __glXScreenInit(GLint numscreens)
+{
+ int s;
+ int c;
+ DMXScreenInfo *dmxScreen0 = &dmxScreens[0];
+ __glXNumActiveScreens = numscreens;
+
+
+ CalcServerVersionAndExtensions();
+
+
+ __glXFBConfigs = NULL;
+ __glXNumFBConfigs = 0;
+
+ 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 = (__GLXFBConfig **)Xalloc( 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];
+ __GLXscreenInfo *glxScreen = &__glXActiveScreens[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 = Xalloc( 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++;
+ }
+
+ }
+
+ }
+
+ }
+
+}
+
+void __glXScreenReset(void)
+{
+ __glXNumActiveScreens = 0;
+}
+
+char *__glXGetServerString( unsigned int name )
+{
+ char *ret = NULL;
+
+ switch( name) {
+
+ case GLX_VENDOR:
+ ret = GLXServerVendorName;
+ break;
+
+ case GLX_VERSION:
+ ret = GLXServerVersion;
+ break;
+
+ case GLX_EXTENSIONS:
+ ret = ExtensionsString;
+ break;
+
+ default:
+ break;
+ }
+
+ return( ret );
+
+}
+
+
+__GLXFBConfig *glxLookupFBConfig( GLXFBConfigID id )
+{
+ int i,j;
+
+ for (i=0, j=0; i<__glXNumFBConfigs; i++,j+=(__glXNumActiveScreens+1) ) {
+ if ( __glXFBConfigs[j]->id == id)
+ return( __glXFBConfigs[j] );
+ }
+
+ return(NULL);
+}
+
+__GLXFBConfig *glxLookupFBConfigByVID( VisualID vid )
+{
+ int i,j;
+
+ for (i=0, j=0; i<__glXNumFBConfigs; i++,j+=(__glXNumActiveScreens+1) ) {
+ if ( __glXFBConfigs[j]->associatedVisualId == vid)
+ return( __glXFBConfigs[j] );
+ }
+
+ return(NULL);
+}
+
+__GLXFBConfig *glxLookupBackEndFBConfig( GLXFBConfigID id, int screen )
+{
+ int i;
+ int j;
+
+ for (i=0, j=0; i<__glXNumFBConfigs; i++,j+=(__glXNumActiveScreens+1) ) {
+ if ( __glXFBConfigs[j]->id == id)
+ return( __glXFBConfigs[j+screen+1] );
+ }
+
+ return(NULL);
+
+}
+
+int glxIsExtensionSupported( char *ext )
+{
+ return( strstr(ExtensionsString, ext) != NULL );
+}