/* erase.c: Erase the screen in various more or less interesting ways.
- * (c) 1997 by Johannes Keukelaar <johannes@nada.kth.se>
- * Permission to use in any way granted. Provided "as is" without expressed
- * or implied warranty. NO WARRANTY, NO EXPRESSION OF SUITABILITY FOR ANY
- * PURPOSE. (I.e.: Use in any way, but at your own risk!)
+ * Copyright (c) 1997-2001 Jamie Zawinski <jwz@jwz.org>
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation. No representations are made about the suitability of this
+ * software for any purpose. It is provided "as is" without express or
+ * implied warranty.
+ *
+ * Portions (c) 1997 by Johannes Keukelaar <johannes@nada.kth.se>:
+ * Permission to use in any way granted. Provided "as is" without expressed
+ * or implied warranty. NO WARRANTY, NO EXPRESSION OF SUITABILITY FOR ANY
+ * PURPOSE. (I.e.: Use in any way, but at your own risk!)
*/
#include "utils.h"
#include "yarandom.h"
#include "usleep.h"
+#include "resources.h"
-#define NUM_MODES 6
+extern char *progname;
-void
-erase_window(Display *dpy, Window window, GC gc,
- int width, int height, int mode, int delay)
+#undef countof
+#define countof(x) (sizeof(x)/sizeof(*(x)))
+
+#define LITTLE_NAP 5000 /* 1/200th sec */
+
+typedef void (*Eraser) (Display *dpy, Window window, GC gc,
+ int width, int height, int total_msecs);
+
+
+static unsigned long
+millitime (void)
+{
+ struct timeval tt;
+# ifdef GETTIMEOFDAY_TWO_ARGS
+ struct timezone tz;
+ gettimeofday (&tt, &tz);
+# else
+ gettimeofday (&tt);
+# endif
+ return (tt.tv_sec * 1000) + (tt.tv_usec / 1000);
+}
+
+
+static void
+random_lines (Display *dpy, Window window, GC gc,
+ int width, int height, int total_msecs)
+{
+ int granularity = 50;
+
+ Bool horiz_p = (random() & 1);
+ int max = (horiz_p ? height : width);
+ int *lines = (int *) calloc(max, sizeof(*lines));
+ int oi = -1;
+ int i;
+ unsigned long start_tick = millitime();
+ unsigned long end_tick = start_tick + total_msecs;
+ unsigned long tick = start_tick;
+ int hits = 0;
+ int nonhits = 0;
+
+ for (i = 0; i < max; i++)
+ lines[i] = i;
+
+ for (i = 0; i < max; i++)
+ {
+ int t, r;
+ t = lines[i];
+ r = random() % max;
+ lines[i] = lines[r];
+ lines[r] = t;
+ }
+
+ while (tick < end_tick)
+ {
+ int i = (max * (tick - start_tick)) / (end_tick - start_tick);
+
+ i /= granularity;
+
+ if (i == oi)
+ {
+ usleep (LITTLE_NAP);
+ nonhits++;
+ }
+ else
+ {
+ int j;
+ for (j = 0; j < granularity; j++)
+ {
+ int ii = i * granularity + j;
+
+ if (ii >= horiz_p ? height : width) /* don't go off array */
+ break;
+
+ if (horiz_p)
+ XDrawLine (dpy, window, gc, 0, lines[ii], width, lines[ii]);
+ else
+ XDrawLine (dpy, window, gc, lines[ii], 0, lines[ii], height);
+ hits++;
+ }
+ XSync (dpy, False);
+ }
+
+ oi = i;
+ tick = millitime();
+ }
+
+ free(lines);
+}
+
+
+static void
+venetian (Display *dpy, Window window, GC gc,
+ int width, int height, int total_msecs)
+{
+ Bool horiz_p = (random() & 1);
+ Bool flip_p = (random() & 1);
+ int max = (horiz_p ? height : width);
+ int *lines = (int *) calloc(max, sizeof(*lines));
+ int i, j;
+ int oi = -1;
+
+ unsigned long start_tick = millitime();
+ unsigned long end_tick = (start_tick +
+ (1.5 * total_msecs)); /* this one needs more */
+ unsigned long tick = start_tick;
+ int hits = 0;
+ int nonhits = 0;
+
+ j = 0;
+ for (i = 0; i < max*2; i++)
+ {
+ int line = ((i / 16) * 16) - ((i % 16) * 15);
+ if (line >= 0 && line < max)
+ lines[j++] = (flip_p ? max - line : line);
+ }
+
+ while (tick < end_tick)
+ {
+ int i = (max * (tick - start_tick)) / (end_tick - start_tick);
+
+ if (i == oi)
+ {
+ usleep (LITTLE_NAP);
+ nonhits++;
+ }
+ else
+ {
+ int k;
+ for (k = oi; k <= i; k++)
+ {
+ if (horiz_p)
+ XDrawLine(dpy,window, gc, 0, lines[k], width, lines[k]);
+ else
+ XDrawLine(dpy,window, gc, lines[k], 0, lines[k], height);
+ hits++;
+ }
+ XSync (dpy, False);
+ }
+
+ oi = i;
+ tick = millitime();
+ }
+ free(lines);
+}
+
+
+static void
+triple_wipe (Display *dpy, Window window, GC gc,
+ int width, int height, int total_msecs)
+{
+ Bool flip_x = random() & 1;
+ Bool flip_y = random() & 1;
+ int max = width + (height / 2);
+ int *lines = (int *)calloc(max, sizeof(int));
+ int i;
+ int oi = -1;
+
+ unsigned long start_tick = millitime();
+ unsigned long end_tick = start_tick + total_msecs;
+ unsigned long tick = start_tick;
+ int hits = 0;
+ int nonhits = 0;
+
+ for(i = 0; i < width/2; i++)
+ lines[i] = i*2+height;
+ for(i = 0; i < height/2; i++)
+ lines[i+width/2] = i*2;
+ for(i = 0; i < width/2; i++)
+ lines[i+width/2+height/2] = width-i*2-(width%2?0:1)+height;
+
+ while (tick < end_tick)
+ {
+ int i = (max * (tick - start_tick)) / (end_tick - start_tick);
+ int x, y, x2, y2;
+
+ if (i == oi)
+ {
+ usleep (LITTLE_NAP);
+ nonhits++;
+ }
+ else
+ {
+ int k;
+ for (k = oi; k <= i; k++)
+ {
+ if (lines[k] < height)
+ x = 0, y = lines[k], x2 = width, y2 = y;
+ else
+ x = lines[k]-height, y = 0, x2 = x, y2 = height;
+
+ if (flip_x)
+ x = width-x, x2 = width-x2;
+ if (flip_y)
+ y = height-y, y2 = height-y2;
+
+ XDrawLine (dpy, window, gc, x, y, x2, y2);
+ hits++;
+ }
+ XSync (dpy, False);
+ }
+
+ oi = i;
+ tick = millitime();
+ }
+ free(lines);
+}
+
+
+static void
+quad_wipe (Display *dpy, Window window, GC gc,
+ int width, int height, int total_msecs)
+{
+ Bool flip_x = random() & 1;
+ Bool flip_y = random() & 1;
+ int max = width + height;
+ int *lines = (int *)calloc(max, sizeof(int));
+ int i;
+ int oi = -1;
+
+ unsigned long start_tick = millitime();
+ unsigned long end_tick = start_tick + total_msecs;
+ unsigned long tick = start_tick;
+ int hits = 0;
+ int nonhits = 0;
+
+ for (i = 0; i < max/4; i++)
+ {
+ lines[i*4] = i*2;
+ lines[i*4+1] = height-i*2-(height%2?0:1);
+ lines[i*4+2] = height+i*2;
+ lines[i*4+3] = height+width-i*2-(width%2?0:1);
+ }
+
+ while (tick < end_tick)
+ {
+ int i = (max * (tick - start_tick)) / (end_tick - start_tick);
+
+ if (i == oi)
+ {
+ usleep (LITTLE_NAP);
+ nonhits++;
+ }
+ else
+ {
+ int k;
+ for (k = oi; k <= i; k++)
+ {
+ int x, y, x2, y2;
+ if (lines[k] < height)
+ x = 0, y = lines[k], x2 = width, y2 = y;
+ else
+ x = lines[k]-height, y = 0, x2 = x, y2 = height;
+
+ if (flip_x)
+ x = width-x, x2 = width-x2;
+ if (flip_y)
+ y = height-y, y2 = height-y2;
+
+ XDrawLine (dpy, window, gc, x, y, x2, y2);
+ hits++;
+ }
+ XSync (dpy, False);
+ }
+
+ oi = i;
+ tick = millitime();
+ }
+
+ free(lines);
+}
+
+
+
+static void
+circle_wipe (Display *dpy, Window window, GC gc,
+ int width, int height, int total_msecs)
+{
+ int max = 360 * 64;
+ int start = random() % max;
+ int rad = (width > height ? width : height);
+ int flip_p = random() & 1;
+ int oth;
+
+ unsigned long start_tick = millitime();
+ unsigned long end_tick = start_tick + total_msecs;
+ unsigned long tick = start_tick;
+
+ int hits = 0;
+ int nonhits = 0;
+
+ oth = (flip_p ? max : 0);
+ while (tick < end_tick)
+ {
+ int th = (max * (tick - start_tick)) / (end_tick - start_tick);
+ if (flip_p)
+ th = (360 * 64) - th;
+
+ if (th == oth)
+ {
+ usleep (LITTLE_NAP);
+ nonhits++;
+ }
+ else
+ {
+ XFillArc(dpy, window, gc,
+ (width/2)-rad, (height/2)-rad, rad*2, rad*2,
+ (start+oth)%(360*64),
+ (th-oth));
+ hits++;
+ XSync (dpy, False);
+ }
+
+ oth = th;
+ tick = millitime();
+ }
+}
+
+
+static void
+three_circle_wipe (Display *dpy, Window window, GC gc,
+ int width, int height, int total_msecs)
+{
+ int max = (360 * 64) / 6;
+ int start = random() % max;
+ int rad = (width > height ? width : height);
+ int oth;
+
+ unsigned long start_tick = millitime();
+ unsigned long end_tick = start_tick + total_msecs;
+ unsigned long tick = start_tick;
+
+ int hits = 0;
+ int nonhits = 0;
+
+ oth = 0;
+ while (tick < end_tick)
+ {
+ int th = (max * (tick - start_tick)) / (end_tick - start_tick);
+
+ if (th == oth)
+ {
+ usleep (LITTLE_NAP);
+ nonhits++;
+ }
+ else
+ {
+ int off = 0;
+ XFillArc(dpy, window, gc,
+ (width/2)-rad, (height/2)-rad, rad*2, rad*2,
+ (start+off+oth)%(360*64),
+ (th-oth));
+ XFillArc(dpy, window, gc,
+ (width/2)-rad, (height/2)-rad, rad*2, rad*2,
+ ((start+off-oth))%(360*64),
+ -(th-oth));
+
+ off += max + max;
+ XFillArc(dpy, window, gc,
+ (width/2)-rad, (height/2)-rad, rad*2, rad*2,
+ (start+off+oth)%(360*64),
+ (th-oth));
+ XFillArc(dpy, window, gc,
+ (width/2)-rad, (height/2)-rad, rad*2, rad*2,
+ ((start+off-oth))%(360*64),
+ -(th-oth));
+
+ off += max + max;
+ XFillArc(dpy, window, gc,
+ (width/2)-rad, (height/2)-rad, rad*2, rad*2,
+ (start+off+oth)%(360*64),
+ (th-oth));
+ XFillArc(dpy, window, gc,
+ (width/2)-rad, (height/2)-rad, rad*2, rad*2,
+ ((start+off-oth))%(360*64),
+ -(th-oth));
+
+ hits++;
+ XSync (dpy, False);
+ }
+
+ oth = th;
+ tick = millitime();
+ }
+}
+
+
+static void
+squaretate (Display *dpy, Window window, GC gc,
+ int width, int height, int total_msecs)
+{
+ int max = ((width > height ? width : width) * 2);
+ int oi = -1;
+ Bool flip = random() & 1;
+
+ unsigned long start_tick = millitime();
+ unsigned long end_tick = start_tick + total_msecs;
+ unsigned long tick = start_tick;
+ int hits = 0;
+ int nonhits = 0;
+
+#define DRAW() \
+ if (flip) { \
+ points[0].x = width-points[0].x; \
+ points[1].x = width-points[1].x; \
+ points[2].x = width-points[2].x; } \
+ XFillPolygon (dpy, window, gc, points, 3, Convex, CoordModeOrigin)
+
+ while (tick < end_tick)
+ {
+ int i = (max * (tick - start_tick)) / (end_tick - start_tick);
+
+ if (i == oi)
+ {
+ usleep (LITTLE_NAP);
+ nonhits++;
+ }
+ else
+ {
+ XPoint points [3];
+ points[0].x = 0;
+ points[0].y = 0;
+ points[1].x = width;
+ points[1].y = 0;
+ points[2].x = 0;
+ points[2].y = points[0].y + ((i * height) / max);
+ DRAW();
+
+ points[0].x = 0;
+ points[0].y = 0;
+ points[1].x = 0;
+ points[1].y = height;
+ points[2].x = ((i * width) / max);
+ points[2].y = height;
+ DRAW();
+
+ points[0].x = width;
+ points[0].y = height;
+ points[1].x = 0;
+ points[1].y = height;
+ points[2].x = width;
+ points[2].y = height - ((i * height) / max);
+ DRAW();
+
+ points[0].x = width;
+ points[0].y = height;
+ points[1].x = width;
+ points[1].y = 0;
+ points[2].x = width - ((i * width) / max);
+ points[2].y = 0;
+ DRAW();
+ hits++;
+ XSync (dpy, True);
+ }
+
+ oi = i;
+ tick = millitime();
+ }
+#undef DRAW
+}
+
+
+/* from Frederick Roeber <roeber@netscape.com> */
+static void
+fizzle (Display *dpy, Window window, GC gc,
+ int width, int height, int total_msecs)
+{
+ /* These dimensions must be prime numbers. They should be roughly the
+ square root of the width and height. */
+# define BX 41
+# define BY 31
+# define SIZE (BX*BY)
+
+ int array[SIZE];
+ int i, j;
+ int oi = -1;
+ XPoint *skews;
+ XPoint points[250];
+ int npoints = 0;
+ int nx, ny;
+
+ unsigned long start_tick = millitime();
+ unsigned long end_tick = (start_tick +
+ (2.5 * total_msecs)); /* this one needs more */
+ unsigned long tick = start_tick;
+ int hits = 0;
+ int nonhits = 0;
+
+ /* Distribute the numbers [0,SIZE) randomly in the array */
+ {
+ int indices[SIZE];
+
+ for( i = 0; i < SIZE; i++ ) {
+ array[i] = -1;
+ indices[i] = i;
+ }
+
+ for( i = 0; i < SIZE; i++ ) {
+ j = random()%(SIZE-i);
+ array[indices[j]] = i;
+ indices[j] = indices[SIZE-i-1];
+ }
+ }
+
+ /* nx, ny are the number of cells across and down, rounded up */
+ nx = width / BX + (0 == (width %BX) ? 0 : 1);
+ ny = height / BY + (0 == (height%BY) ? 0 : 1);
+ skews = (XPoint *)malloc(sizeof(XPoint) * (nx*ny));
+ if( (XPoint *)0 != skews ) {
+ for( i = 0; i < nx; i++ ) {
+ for( j = 0; j < ny; j++ ) {
+ skews[j * nx + i].x = random()%BX;
+ skews[j * nx + i].y = random()%BY;
+ }
+ }
+ }
+
+# define SKEWX(cx, cy) (((XPoint *)0 == skews)?0:skews[cy*nx + cx].x)
+# define SKEWY(cx, cy) (((XPoint *)0 == skews)?0:skews[cy*nx + cx].y)
+
+ while (tick < end_tick)
+ {
+ int i = (SIZE * (tick - start_tick)) / (end_tick - start_tick);
+
+ if (i == oi)
+ {
+ usleep (LITTLE_NAP);
+ nonhits++;
+ }
+ else
+ {
+ int j;
+ for (j = oi; j < i; j++)
+ {
+ int x = array[j] % BX;
+ int y = array[j] / BX;
+ int iy, cy;
+ for (iy = 0, cy = 0; iy < height; iy += BY, cy++)
+ {
+ int ix, cx;
+ for( ix = 0, cx = 0; ix < width; ix += BX, cx++ ) {
+ int xx = ix + (SKEWX(cx, cy) + x*((cx%(BX-1))+1))%BX;
+ int yy = iy + (SKEWY(cx, cy) + y*((cy%(BY-1))+1))%BY;
+ if (xx < width && yy < height)
+ {
+ points[npoints].x = xx;
+ points[npoints].y = yy;
+ if (++npoints == countof(points))
+ {
+ XDrawPoints(dpy, window, gc, points, npoints,
+ CoordModeOrigin);
+ XSync (dpy, False);
+ npoints = 0;
+ }
+ }
+ }
+ }
+ }
+ hits++;
+ }
+
+ oi = i;
+ tick = millitime();
+ }
+
+ if (npoints > 100)
+ {
+ XDrawPoints(dpy, window, gc, points, npoints, CoordModeOrigin);
+ XSync (dpy, False);
+ usleep (10000);
+ }
+
+# undef SKEWX
+# undef SKEWY
+# undef BX
+# undef BY
+# undef SIZE
+
+ if (skews) free(skews);
+}
+
+
+/* from Rick Campbell <rick@campbellcentral.org> */
+static void
+spiral (Display *dpy, Window window, GC context,
+ int width, int height, int total_msecs)
+{
+ int granularity = 1; /* #### */
+
+ double pi2 = (M_PI + M_PI);
+ int loop_count = 10;
+ int angle_step = 1000 / 8; /* disc granularity is 8 degrees */
+ int max = pi2 * angle_step;
+ double angle;
+ int arc_limit;
+ int arc_max_limit;
+ int length_step;
+ XPoint points [3];
+
+ total_msecs *= 2.5; /* this one needs more */
+
+ angle = 0.0;
+ arc_limit = 1;
+ arc_max_limit = (ceil (sqrt ((width * width) + (height * height))) / 2.0);
+ length_step = ((arc_max_limit + loop_count - 1) / loop_count);
+ arc_max_limit += length_step;
+ points [0].x = width / 2;
+ points [0].y = height / 2;
+ points [1].x = points [0].x + length_step;
+ points [1].y = points [0].y;
+ points [2].x = points [1].x;
+ points [2].y = points [1].y;
+
+ for (arc_limit = length_step;
+ arc_limit < arc_max_limit;
+ arc_limit += length_step)
+ {
+ int arc_length = length_step;
+ int length_base = arc_limit;
+
+ unsigned long start_tick = millitime();
+ unsigned long end_tick = start_tick + (total_msecs /
+ (arc_max_limit / length_step));
+ unsigned long tick = start_tick;
+ int hits = 0;
+ int nonhits = 0;
+ int i = 0;
+ int oi = -1;
+
+#if 0
+ int max2 = max / granularity;
+ while (i < max2)
+#else
+ while (tick < end_tick)
+#endif
+ {
+ i = (max * (tick - start_tick)) / (end_tick - start_tick);
+ if (i > max) i = max;
+
+ i /= granularity;
+
+ if (i == oi)
+ {
+ usleep (LITTLE_NAP);
+ nonhits++;
+ }
+ else
+ {
+ int j, k;
+#if 0
+ for (k = oi; k <= i; k++)
+#else
+ k = i;
+#endif
+ {
+ for (j = 0; j < granularity; j++)
+ {
+ int ii = k * granularity + j;
+ angle = ii / (double) angle_step;
+ arc_length = length_base + ((length_step * angle) / pi2);
+ points [1].x = points [2].x;
+ points [1].y = points [2].y;
+ points [2].x = points [0].x +
+ (int)(cos(angle) * arc_length);
+ points [2].y = points [0].y +
+ (int)(sin(angle) * arc_length);
+ XFillPolygon (dpy, window, context, points, 3, Convex,
+ CoordModeOrigin);
+ hits++;
+ }
+ }
+ XSync (dpy, False);
+ }
+
+ oi = i;
+ tick = millitime();
+ }
+ }
+}
+
+
+#undef MAX
+#undef MIN
+#define MAX(a,b) ((a)>(b)?(a):(b))
+#define MIN(a,b) ((a)<(b)?(a):(b))
+
+/* from David Bagley <bagleyd@tux.org> */
+static void
+random_squares(Display * dpy, Window window, GC gc,
+ int width, int height, int total_msecs)
+{
+ int granularity = 20;
+
+ int randsize = MAX(1, MIN(width, height) / (16 + (random() % 32)));
+ int max = (height / randsize + 1) * (width / randsize + 1);
+ int *squares = (int *) calloc(max, sizeof (*squares));
+ int i;
+ int columns = width / randsize + 1; /* Add an extra for roundoff */
+
+ int oi = -1;
+ unsigned long start_tick = millitime();
+ unsigned long end_tick = start_tick + total_msecs;
+ unsigned long tick = start_tick;
+ int hits = 0;
+ int nonhits = 0;
+
+ for (i = 0; i < max; i++)
+ squares[i] = i;
+
+ for (i = 0; i < max; i++)
+ {
+ int t, r;
+ t = squares[i];
+ r = random() % max;
+ squares[i] = squares[r];
+ squares[r] = t;
+ }
+
+ while (tick < end_tick)
+ {
+ int i = (max * (tick - start_tick)) / (end_tick - start_tick);
+
+ i /= granularity;
+
+ if (i == oi)
+ {
+ usleep (LITTLE_NAP);
+ nonhits++;
+ }
+ else
+ {
+ int j;
+ for (j = 0; j < granularity; j++)
+ {
+ int ii = i * granularity + j;
+
+ XFillRectangle(dpy, window, gc,
+ (squares[ii] % columns) * randsize,
+ (squares[ii] / columns) * randsize,
+ randsize, randsize);
+ hits++;
+ }
+ }
+ XSync (dpy, False);
+
+ oi = i;
+ tick = millitime();
+ }
+ free(squares);
+}
+
+/* I first saw something like this, albeit in reverse, in an early Tetris
+ implementation for the Mac.
+ -- Torbjörn Andersson <torbjorn@dev.eurotime.se>
+ */
+static void
+slide_lines (Display *dpy, Window window, GC gc,
+ int width, int height, int total_msecs)
+{
+ int max = width;
+ int dy = MAX (10, height/40);
+
+ int oi = 0;
+ unsigned long start_tick = millitime();
+ unsigned long end_tick = start_tick + total_msecs;
+ unsigned long tick = start_tick;
+ int hits = 0;
+ int nonhits = 0;
+
+ while (tick < end_tick)
+ {
+ int i = (max * (tick - start_tick)) / (end_tick - start_tick);
+
+ if (i == oi)
+ {
+ usleep (LITTLE_NAP);
+ nonhits++;
+ }
+ else
+ {
+ int y;
+ int tick = 0;
+ int from1 = oi;
+ int to1 = i;
+ int w = width-to1;
+ int from2 = width - oi - w;
+ int to2 = width - i - w;
+
+ for (y = 0; y < height; y += dy)
+ {
+ if (++tick & 1)
+ {
+ XCopyArea (dpy, window, window, gc, from1, y, w, dy, to1, y);
+ XFillRectangle (dpy, window, gc, from1, y, to1-from1, dy);
+ }
+ else
+ {
+ XCopyArea (dpy, window, window, gc, from2, y, w, dy, to2, y);
+ XFillRectangle (dpy, window, gc, from2+w, y, to2-from2, dy);
+ }
+ }
+
+ hits++;
+ XSync (dpy, False);
+ }
+
+ oi = i;
+ tick = millitime();
+ }
+}
+
+
+/* from Frederick Roeber <roeber@xigo.com> */
+static void
+losira (Display * dpy, Window window, GC gc,
+ int width, int height, int total_msecs)
{
- int *clear_lines;
- int i, j, line, num_lines=0, granularity, max_num;
-
- max_num = 2*height;
- if(2*width>max_num)
- max_num = 2*width;
-
- clear_lines = (int *)calloc(max_num, sizeof(int));
- if(clear_lines)
- {
- if(mode<0 || mode>=NUM_MODES)
- mode = random()%NUM_MODES;
- granularity = 25;
- switch(mode)
- {
- case 0:
- for(i = 0; i < height; i++)
- clear_lines[i] = i;
- for(i = 0; i < height; i++)
- {
- int t, r;
- t = clear_lines[i];
- r = random()%height;
- clear_lines[i] = clear_lines[r];
- clear_lines[r] = t;
- }
- num_lines = height;
- break;
- case 1:
- for(i = 0; i < width; i++)
- clear_lines[i] = i+height;
- for(i = 0; i < width; i++)
- {
- int t, r;
- t = clear_lines[i];
- r = random()%width;
- clear_lines[i] = clear_lines[r];
- clear_lines[r] = t;
- }
- num_lines = width;
- break;
- case 2:
- for(i = 0; i < width/2; i++)
- clear_lines[i] = i*2+height;
- for(i = 0; i < height/2; i++)
- clear_lines[i+width/2] = i*2;
- for(i = 0; i < width/2; i++)
- clear_lines[i+width/2+height/2] = width-i*2-(width%2?0:1)+height;
- num_lines = width+height/2;
- granularity = 4;
- break;
- case 3:
- for(i = 0; i < max_num/4; i++)
- {
- clear_lines[i*4] = i*2;
- clear_lines[i*4+1] = height-i*2-(height%2?0:1);
- clear_lines[i*4+2] = height+i*2;
- clear_lines[i*4+3] = height+width-i*2-(width%2?0:1);
- }
- num_lines = max_num;
- granularity = 4;
- break;
- case 4:
- j = 0;
- for(i = 0; i < width*2; i++)
- {
- line = (i/16)*16-(i%16)*15;
- if(line>=0 && line<width)
- {
- clear_lines[j] = height+line;
- j++;
- }
- }
- num_lines = width;
- granularity = 4;
- break;
- case 5:
- j = 0;
- for(i = width*2; i >= 0; i--)
- {
- line = (i/16)*16-(i%16)*15;
- if(line>=0 && line<width)
- {
- clear_lines[j] = height+line;
- j++;
- }
- }
- num_lines = width;
- granularity = 4;
- break;
- }
- for (i = 0; i < num_lines; i++)
- {
- if(clear_lines[i] < height)
- XDrawLine (dpy, window, gc, 0, clear_lines[i], width,
- clear_lines[i]);
- else
- XDrawLine (dpy, window, gc, clear_lines[i]-height, 0,
- clear_lines[i]-height, height);
- XFlush (dpy);
- if ((i % granularity) == 0)
- {
- usleep (delay*granularity);
- }
- }
-
- free(clear_lines);
+ XGCValues gcv;
+ XWindowAttributes wa;
+ XColor white;
+ GC white_gc;
+ XArc arc[2][8];
+ double xx[8], yy[8], dx[8], dy[8];
+
+ int i;
+ int oi = 0;
+
+ int max = width/2;
+ int max_off = MAX(1, max / 12);
+
+ int msecs1 = (0.55 * total_msecs);
+ int msecs2 = (0.30 * total_msecs);
+ int msecs3 = (0.15 * total_msecs);
+
+ unsigned long start_tick = millitime();
+ unsigned long end_tick = start_tick + msecs1;
+ unsigned long tick = start_tick;
+ int hits = 0;
+ int nonhits = 0;
+
+ XGetWindowAttributes(dpy, window, &wa);
+ white.flags = DoRed|DoGreen|DoBlue;
+ white.red = white.green = white.blue = 65535;
+ XAllocColor(dpy, wa.colormap, &white);
+ gcv.foreground = white.pixel;
+ white_gc = XCreateGC(dpy, window, GCForeground, &gcv);
+
+ /* Squeeze in from the sides */
+ while (tick < end_tick)
+ {
+ int i = (max * (tick - start_tick)) / (end_tick - start_tick);
+
+ if (i == oi)
+ {
+ usleep (LITTLE_NAP);
+ nonhits++;
+ }
+ else
+ {
+ int off = (max_off * (tick - start_tick)) / (end_tick - start_tick);
+
+ int from1 = oi;
+ int to1 = i;
+ int w = max - to1 - off/2 + 1;
+ int from2 = max+(to1-from1)+off/2;
+ int to2 = max+off/2;
+
+ if (w < 0)
+ break;
+
+ XCopyArea (dpy, window, window, gc, from1, 0, w, height, to1, 0);
+ XCopyArea (dpy, window, window, gc, from2, 0, w, height, to2, 0);
+ XFillRectangle (dpy, window, gc, from1, 0, (to1-from1), height);
+ XFillRectangle (dpy, window, gc, to2+w, 0, from2+w, height);
+ XFillRectangle (dpy, window, white_gc, max-off/2, 0, off, height);
+ hits++;
+ XSync(dpy, False);
+ }
+
+ oi = i;
+ tick = millitime();
+ }
+
+
+ XFillRectangle(dpy, window, white_gc, max-max_off/2, 0, max_off, height);
+
+ /* Cap the top and bottom of the line */
+ XFillRectangle(dpy, window, gc, max-max_off/2, 0, max_off, max_off/2);
+ XFillRectangle(dpy, window, gc, max-max_off/2, height-max_off/2,
+ max_off, max_off/2);
+ XFillArc(dpy, window, white_gc, max-max_off/2-1, 0,
+ max_off-1, max_off-1, 0, 180*64);
+ XFillArc(dpy, window, white_gc, max-max_off/2-1, height-max_off,
+ max_off-1, max_off-1,
+ 180*64, 360*64);
+
+ XFillRectangle(dpy, window, gc, 0, 0, max-max_off/2, height);
+ XFillRectangle(dpy, window, gc, max+max_off/2-1, 0, max-max_off/2, height);
+ XSync(dpy, False);
+
+ /* Collapse vertically */
+ start_tick = millitime();
+ end_tick = start_tick + msecs2;
+ tick = start_tick;
+
+ max = height/2;
+ oi = 0;
+ while (tick < end_tick)
+ {
+ int i = (max * (tick - start_tick)) / (end_tick - start_tick);
+ int x = (width-max_off)/2;
+ int w = max_off;
+
+ if (i == oi)
+ {
+ usleep (LITTLE_NAP);
+ nonhits++;
+ }
+ else
+ {
+ int off = (max_off * (tick - start_tick)) / (end_tick - start_tick);
+
+ int from1 = oi;
+ int to1 = i;
+ int h = max - to1 - off/2;
+ int from2 = max+(to1-from1)+off/2;
+ int to2 = max+off/2;
+
+ if (h < max_off/2)
+ break;
+
+ XCopyArea (dpy, window, window, gc, x, from1, w, h, x, to1);
+ XCopyArea (dpy, window, window, gc, x, from2, w, h, x, to2);
+ XFillRectangle(dpy, window, gc, x, from1, w, (to1 - from1));
+ XFillRectangle(dpy, window, gc, x, to2+h, w, (to2 - from2));
+ hits++;
+ XSync(dpy, False);
+ }
+
+ oi = i;
+ tick = millitime();
}
+ /* "This is Sci-Fi" */
+ for( i = 0; i < 8; i++ ) {
+ arc[0][i].width = arc[0][i].height = max_off;
+ arc[1][i].width = arc[1][i].height = max_off;
+ arc[0][i].x = arc[1][i].x = width/2;
+ arc[0][i].y = arc[1][i].y = height/2;
+ xx[i] = (double)(width/2) - max_off/2;
+ yy[i] = (double)(height/2) - max_off/2;
+ }
+
+ arc[0][0].angle1 = arc[1][0].angle1 = 0*64; arc[0][0].angle2 = arc[1][0].angle2 = 45*64;
+ arc[0][1].angle1 = arc[1][1].angle1 = 45*64; arc[0][1].angle2 = arc[1][1].angle2 = 45*64;
+ arc[0][2].angle1 = arc[1][2].angle1 = 90*64; arc[0][2].angle2 = arc[1][2].angle2 = 45*64;
+ arc[0][3].angle1 = arc[1][3].angle1 = 135*64; arc[0][3].angle2 = arc[1][3].angle2 = 45*64;
+ arc[0][4].angle1 = arc[1][4].angle1 = 180*64; arc[0][4].angle2 = arc[1][4].angle2 = 45*64;
+ arc[0][5].angle1 = arc[1][5].angle1 = 225*64; arc[0][5].angle2 = arc[1][5].angle2 = 45*64;
+ arc[0][6].angle1 = arc[1][6].angle1 = 270*64; arc[0][6].angle2 = arc[1][6].angle2 = 45*64;
+ arc[0][7].angle1 = arc[1][7].angle1 = 315*64; arc[0][7].angle2 = arc[1][7].angle2 = 45*64;
+
+ for( i = 0; i < 8; i++ ) {
+ dx[i] = cos((i*45 + 22.5)/360 * 2*M_PI);
+ dy[i] = -sin((i*45 + 22.5)/360 * 2*M_PI);
+ }
+
+ gcv.line_width = 3;
+ XChangeGC(dpy, gc, GCLineWidth, &gcv);
+
XClearWindow (dpy, window);
+ XFillArc(dpy, window, white_gc,
+ width/2-max_off/2-1, height/2-max_off/2-1,
+ max_off-1, max_off-1,
+ 0, 360*64);
+ XDrawLine(dpy, window, gc, 0, height/2-1, width, height/2-1);
+ XDrawLine(dpy, window, gc, width/2-1, 0, width/2-1, height);
+ XDrawLine(dpy, window, gc, width/2-1-max_off, height/2-1-max_off,
+ width/2+max_off, height/2+max_off);
+ XDrawLine(dpy, window, gc, width/2+max_off, height/2-1-max_off,
+ width/2-1-max_off, height/2+max_off);
+
+ XSync(dpy, False);
+
+
+ /* Fan out */
+ start_tick = millitime();
+ end_tick = start_tick + msecs3;
+ tick = start_tick;
+ oi = 0;
+ while (tick < end_tick)
+ {
+ int i = (max_off * (tick - start_tick)) / (end_tick - start_tick);
+
+ if (i == oi)
+ {
+ usleep (LITTLE_NAP);
+ nonhits++;
+ }
+ else
+ {
+ int j;
+ for (j = 0; j < 8; j++)
+ {
+ xx[j] += 2*dx[j];
+ yy[j] += 2*dy[j];
+ arc[(i+1)%2][j].x = xx[j];
+ arc[(i+1)%2][j].y = yy[j];
+ }
+
+ XFillRectangle (dpy, window, gc,
+ (width-max_off*5)/2, (height-max_off*5)/2,
+ max_off*5, max_off*5);
+ XFillArcs(dpy, window, white_gc, arc[(i+1)%2], 8);
+ XSync(dpy, False);
+ hits++;
+ }
+
+ oi = i;
+ tick = millitime();
+ }
+
+ XSync (dpy, False);
+
+ /*XFreeColors(dpy, wa.colormap, &white.pixel, 1, 0);*/
+ XFreeGC(dpy, white_gc);
+}
+
+
+
+static Eraser erasers[] = {
+ random_lines,
+ venetian,
+ triple_wipe,
+ quad_wipe,
+ circle_wipe,
+ three_circle_wipe,
+ squaretate,
+ fizzle,
+ spiral,
+ random_squares,
+ slide_lines,
+ losira,
+};
+
+
+static void
+erase_window (Display *dpy, Window window, GC gc,
+ int width, int height, int mode, int total_msecs)
+{
+ Bool verbose_p = False;
+ unsigned long start = millitime();
+
+ if (mode < 0 || mode >= countof(erasers))
+ mode = random() % countof(erasers);
+
+ (*(erasers[mode])) (dpy, window, gc, width, height, total_msecs);
+
+ if (verbose_p)
+ fprintf(stderr, "%s: eraser %d time: %4.2f sec\n",
+ progname, mode, (millitime() - start) / 1000.0);
+
+ XClearWindow (dpy, window);
+ XSync(dpy, False);
+ usleep (333333); /* 1/3 sec */
+}
+
+
+void
+erase_full_window(Display *dpy, Window window)
+{
+ XWindowAttributes xgwa;
+ XGCValues gcv;
+ GC erase_gc;
+ XColor black;
+ int erase_msecs, erase_mode;
+ char *s;
+
+ s = get_string_resource("eraseSeconds", "Integer");
+ if (s && *s)
+ erase_msecs = 1000 * get_float_resource("eraseSeconds", "Float");
+ else
+ erase_msecs = 1000;
+
+ if (erase_msecs < 10 || erase_msecs > 10000)
+ erase_msecs = 1000;
+
+ if (s) free(s);
+
+ s = get_string_resource("eraseMode", "Integer");
+ if (s && *s)
+ erase_mode = get_integer_resource("eraseMode", "Integer");
+ else
+ erase_mode = -1;
+ if (s) free(s);
+
+ XGetWindowAttributes (dpy, window, &xgwa);
+ black.flags = DoRed|DoGreen|DoBlue;
+ black.red = black.green = black.blue = 0;
+ XAllocColor(dpy, xgwa.colormap, &black);
+ gcv.foreground = black.pixel;
+ erase_gc = XCreateGC (dpy, window, GCForeground, &gcv);
+ erase_window (dpy, window, erase_gc, xgwa.width, xgwa.height,
+ erase_mode, erase_msecs);
+ XFreeColors(dpy, xgwa.colormap, &black.pixel, 1, 0);
+ XFreeGC(dpy, erase_gc);
}
projects / xscreensaver / blobdiff