http://packetstormsecurity.org/UNIX/admin/xscreensaver-4.02.tar.gz

[xscreensaver] / hacks / glx / pipes.c

diff --git a/hacks/glx/pipes.c b/hacks/glx/pipes.c
index 31a0bdd305756fe6e496a8a5432f55a1b4a6acb4..db1e792daddef208426799d0d8eaa0f3028170a4 100644 (file)
--- a/hacks/glx/pipes.c
+++ b/hacks/glx/pipes.c
@@ -64,6 +64,7 @@ static const char sccsid[] = "@(#)pipes.c     4.07 97/11/24 xlockmore";
                        "*fpsSolid:     True    \n"                 \
                                        "*fisheye:              True    \n"                     \
                                        "*tightturns:   False   \n"                     \
+                                       "*doubleBuffer: True    \n"                     \
                                        "*rotatepipes:  True    \n"
 # include "xlockmore.h"                                /* from the xscreensaver distribution */
 #else  /* !STANDALONE */
@@ -79,10 +80,12 @@ static const char sccsid[] = "@(#)pipes.c   4.07 97/11/24 xlockmore";
 #define DEF_FISHEYE     "True"
 #define DEF_TIGHTTURNS  "False"
 #define DEF_ROTATEPIPES "True"
+#define DEF_DBUF        "False"
 #define NofSysTypes     3
 
 static int  factory;
 static Bool fisheye, tightturns, rotatepipes;
+static Bool dbuf_p;
 
 static XrmOptionDescRec opts[] =
 {
@@ -92,21 +95,25 @@ static XrmOptionDescRec opts[] =
        {"-tightturns", ".pipes.tightturns", XrmoptionNoArg, (caddr_t) "on"},
        {"+tightturns", ".pipes.tightturns", XrmoptionNoArg, (caddr_t) "off"},
       {"-rotatepipes", ".pipes.rotatepipes", XrmoptionNoArg, (caddr_t) "on"},
-      {"+rotatepipes", ".pipes.rotatepipes", XrmoptionNoArg, (caddr_t) "off"}
+      {"+rotatepipes", ".pipes.rotatepipes", XrmoptionNoArg, (caddr_t) "off"},
+      {"-db", ".pipes.doubleBuffer", XrmoptionNoArg, (caddr_t) "on"},
+      {"+db", ".pipes.doubleBuffer", XrmoptionNoArg, (caddr_t) "off"},
 };
 static argtype vars[] =
 {
        {(caddr_t *) & factory, "factory", "Factory", DEF_FACTORY, t_Int},
        {(caddr_t *) & fisheye, "fisheye", "Fisheye", DEF_FISHEYE, t_Bool},
        {(caddr_t *) & tightturns, "tightturns", "Tightturns", DEF_TIGHTTURNS, t_Bool},
-       {(caddr_t *) & rotatepipes, "rotatepipes", "Rotatepipes", DEF_ROTATEPIPES, t_Bool}
+       {(caddr_t *) & rotatepipes, "rotatepipes", "Rotatepipes", DEF_ROTATEPIPES, t_Bool},
+       {(caddr_t *) & dbuf_p, "doubleBuffer", "DoubleBuffer", DEF_DBUF, t_Bool}
 };
 static OptionStruct desc[] =
 {
        {"-factory num", "how much extra equipment in pipes (0 for none)"},
        {"-/+fisheye", "turn on/off zoomed-in view of pipes"},
        {"-/+tightturns", "turn on/off tight turns"},
-       {"-/+rotatepipes", "turn on/off pipe system rotation per screenful"}
+       {"-/+rotatepipes", "turn on/off pipe system rotation per screenful"},
+       {"-/+db", "turn on/off double buffering"}
 };
 
 ModeSpecOpt pipes_opts =
@@ -534,7 +541,7 @@ pinit(ModeInfo * mi, int zera)
 
        if (zera) {
                pp->system_number = 1;
-               glDrawBuffer(GL_FRONT_AND_BACK);
+               glDrawBuffer(dbuf_p ? GL_BACK : GL_FRONT);
                glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
                (void) memset(pp->Cells, 0, sizeof (pp->Cells));
                for (X = 0; X < HCELLS; X++) {
@@ -731,7 +738,8 @@ draw_pipes(ModeInfo * mi)
                /* If the maximum number of system was drawn, restart (clearing the screen), */
                /* else start a new system. */
                if (++pp->system_number > pp->number_of_systems) {
-                       (void) sleep(1);
+          if (!mi->fps_p)
+            sleep(1);
                        pinit(mi, 1);
                } else {
                        pinit(mi, 0);
@@ -961,7 +969,8 @@ draw_pipes(ModeInfo * mi)
 
        glFlush();
 
-    glXSwapBuffers(display, window);
+    if (dbuf_p)
+      glXSwapBuffers(display, window);
 
     if (mi->fps_p) do_fps (mi);
 }