From http://www.jwz.org/xscreensaver/xscreensaver-5.38.tar.gz

[xscreensaver] / hacks / drift.c

diff --git a/hacks/drift.c b/hacks/drift.c
index 56e89b0a1ef85aa61372448008d00dfb8bd7c198..e88986b234fd6c2c8022130f630bb8214b5ca1de 100644 (file)
--- a/hacks/drift.c
+++ b/hacks/drift.c
@@ -36,12 +36,13 @@ static const char sccsid[] = "@(#)drift.c   5.00 2000/11/01 xlockmore";
                                  "*count: 30 \n" \
                                  "*ncolors: 200 \n" \
                                  "*fpsSolid: true \n" \
+                                 "*ignoreRotation: True \n" \
 
 # define SMOOTH_COLORS
+# define release_drift 0
 # define reshape_drift 0
 # define drift_handle_event 0
 # include "xlockmore.h"                /* in xscreensaver distribution */
-# include "erase.h"
 #else /* STANDALONE */
 # define ENTRYPOINT /**/
 # include "xlock.h"            /* in xlockmore distribution */
@@ -82,8 +83,8 @@ ENTRYPOINT ModeSpecOpt drift_opts =
 
 #ifdef USE_MODULES
 ModStruct   drift_description =
-{"drift", "init_drift", "draw_drift", "release_drift",
- "refresh_drift", "init_drift", (char *) NULL, &drift_opts,
+{"drift", "init_drift", "draw_drift", (char *) NULL,
+ "refresh_drift", "init_drift", "free_drift", &drift_opts,
  10000, 30, 1, 1, 64, 1.0, "",
  "Shows cosmic drifting flame fractals", 0, NULL};
 
@@ -134,10 +135,7 @@ typedef struct {
        long        saved_random_bits;
        int         nbits;
 
-#ifdef STANDALONE
   int erase_countdown;
-  eraser_state *eraser;
-#endif
 } driftstruct;
 
 static driftstruct *drifts = (driftstruct *) NULL;
@@ -242,9 +240,7 @@ initmode(ModeInfo * mi, int mode)
        }
        dp->fractal_len = (dp->fractal_len * MI_COUNT(mi)) / 20;
 
-#ifndef STANDALONE
        MI_CLEARWINDOW(mi);
-#endif
 }
 
 static void
@@ -269,9 +265,10 @@ pick_df_coefs(ModeInfo * mi)
        }
 }
 
-static void
-free_drift(driftstruct *dp)
+ENTRYPOINT void
+free_drift(ModeInfo * mi)
 {
+       driftstruct *dp = &drifts[MI_SCREEN(mi)];
        if (dp->ncpoints != NULL) {
                (void) free((void *) dp->ncpoints);
                dp->ncpoints = (int *) NULL;
@@ -296,14 +293,14 @@ initfractal(ModeInfo * mi)
        if (!dp->ncpoints) {
                if ((dp->ncpoints = (int *) malloc(sizeof (int) * MI_NCOLORS(mi))) ==
                        NULL) {
-                       free_drift(dp);
+                       free_drift(mi);
                        return;
                }
        }
        if (!dp->cpts) {
                if ((dp->cpts = (XPoint *) malloc(MAXBATCH2 * sizeof (XPoint) *
                         MI_NCOLORS(mi))) == NULL) {
-                       free_drift(dp);
+                       free_drift(mi);
                        return;
                }
        }
@@ -349,11 +346,7 @@ init_drift(ModeInfo * mi)
 {
        driftstruct *dp;
 
-       if (drifts == NULL) {
-               if ((drifts = (driftstruct *) calloc(MI_NUM_SCREENS(mi),
-                                             sizeof (driftstruct))) == NULL)
-                       return;
-       }
+       MI_INIT (mi, drifts);
        dp = &drifts[MI_SCREEN(mi)];
 
        dp->width = MI_WIDTH(mi);
@@ -624,14 +617,11 @@ draw_drift(ModeInfo * mi)
 
     if (dp->erase_countdown) {
       if (!--dp->erase_countdown) {
-        dp->eraser = erase_window (MI_DISPLAY(mi), MI_WINDOW(mi), dp->eraser);
+        initmode(mi, frandom(dp, 2));
+        initfractal(mi);
       }
       return;
     }
-    if (dp->eraser) {
-      dp->eraser = erase_window (MI_DISPLAY(mi), MI_WINDOW(mi), dp->eraser);
-      return;
-    }
 
        MI_IS_DRAWN(mi) = True;
        dp->timer = 3000;
@@ -641,10 +631,8 @@ draw_drift(ModeInfo * mi)
                if (dp->total_points++ > dp->fractal_len) {
                        draw_flush(mi, dp, window);
                        if (0 == --dp->nfractals) {
-#ifdef STANDALONE
               dp->erase_countdown = 4 * 1000000 / MI_PAUSE(mi);
-#endif /* STANDALONE */
-                               initmode(mi, frandom(dp, 2));
+                               return;
                        }
                        initfractal(mi);
                }
@@ -671,24 +659,13 @@ draw_drift(ModeInfo * mi)
        }
 }
 
-ENTRYPOINT void
-release_drift(ModeInfo * mi)
-{
-       if (drifts != NULL) {
-               int         screen;
-
-               for (screen = 0; screen < MI_NUM_SCREENS(mi); screen++)
-                       free_drift(&drifts[screen]);
-               (void) free((void *) drifts);
-               drifts = (driftstruct *) NULL;
-       }
-}
-
+#ifndef STANDALONE
 ENTRYPOINT void
 refresh_drift(ModeInfo * mi)
 {
        MI_CLEARWINDOW(mi);
 }
+#endif
 
 XSCREENSAVER_MODULE ("Drift", drift)