/* webcollage-helper --- scales and pastes one image into another
- * xscreensaver, Copyright (c) 2002, 2003 Jamie Zawinski <jwz@jwz.org>
+ * xscreensaver, Copyright (c) 2002-2005 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
* implied warranty.
*/
+/* This is the GDK + JPEGlib implementation. See webcollage-helper-cocoa.m
+ for the Cocoa implementation.
+ */
+
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include <stdio.h>
+#include <math.h>
#include <string.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
+#undef HAVE_STDLIB_H /* stupid jconfig.h! */
#include <jpeglib.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
return pb;
}
+
+static void
+bevel_image (GdkPixbuf **pbP, int bevel_pct,
+ int x, int y, int w, int h)
+{
+ GdkPixbuf *pb = *pbP;
+ int small_size = (w > h ? h : w);
+
+ int bevel_size = small_size * (bevel_pct / 100.0);
+
+ /* Use a proportionally larger bevel size for especially small images. */
+ if (bevel_size < 20 && small_size > 40) bevel_size = 20;
+ else if (bevel_size < 10 && small_size > 20) bevel_size = 10;
+ else if (bevel_size < 5) /* too small to bother bevelling */
+ return;
+
+ /* Ensure the pixbuf has an alpha channel. */
+ if (! gdk_pixbuf_get_has_alpha (pb))
+ {
+ GdkPixbuf *pb2 = gdk_pixbuf_add_alpha (pb, FALSE, 0, 0, 0);
+ gdk_pixbuf_unref (pb);
+ pb = pb2;
+ }
+
+ {
+ guchar *data = gdk_pixbuf_get_pixels (pb);
+ guchar *line;
+ int rs = gdk_pixbuf_get_rowstride (pb);
+ int ch = gdk_pixbuf_get_n_channels (pb);
+ int xx, yy;
+ double *ramp = (double *) malloc (sizeof(*ramp) * (bevel_size + 1));
+
+ if (!ramp)
+ {
+ fprintf (stderr, "%s: out of memory (%d)\n", progname, bevel_size);
+ exit (1);
+ }
+
+ for (xx = 0; xx <= bevel_size; xx++)
+ {
+
+# if 0 /* linear */
+ ramp[xx] = xx / (double) bevel_size;
+
+# else /* sinusoidal */
+ double p = (xx / (double) bevel_size);
+ double s = sin (p * M_PI / 2);
+ ramp[xx] = s;
+# endif
+ }
+
+ line = data + (rs * y);
+ for (yy = 0; yy < h; yy++)
+ {
+ guchar *p = line + (x * ch);
+ for (xx = 0; xx < w; xx++)
+ {
+ double rx, ry, r;
+
+ if (xx < bevel_size) rx = ramp[xx];
+ else if (xx >= w - bevel_size) rx = ramp[w - xx - 1];
+ else rx = 1;
+
+ if (yy < bevel_size) ry = ramp[yy];
+ else if (yy >= h - bevel_size) ry = ramp[h - yy - 1];
+ else ry = 1;
+
+ r = rx * ry;
+ if (r != 1)
+ p[ch-1] *= r;
+
+ p += ch;
+ }
+ line += rs;
+ }
+
+#if 0 /* show the ramp */
+ line = data + (rs * y);
+ for (yy = 0; yy < h; yy++)
+ {
+ guchar *p = line + (x * ch);
+ for (xx = 0; xx < w; xx++)
+ {
+ int cc = 0;
+ for (cc = 0; cc < ch-1; cc++)
+ p[cc] = 255;
+ p += ch;
+ }
+ line += rs;
+ }
+#endif
+
+ free (ramp);
+
+ if (verbose_p)
+ fprintf (stderr, "%s: added %d%% bevel (%d px)\n", progname,
+ bevel_pct, bevel_size);
+ }
+
+ *pbP = pb;
+}
+
+
static void
paste (const char *paste_file,
const char *base_file,
double from_scale,
- double opacity,
+ double opacity, int bevel_pct,
int from_x, int from_y, int to_x, int to_y,
int w, int h)
{
}
}
- if (opacity == 1.0)
+ if (bevel_pct > 0)
+ bevel_image (&paste_pb, bevel_pct,
+ from_x, from_y, w, h);
+
+ if (opacity == 1.0 && bevel_pct == 0)
gdk_pixbuf_copy_area (paste_pb,
from_x, from_y, w, h,
base_pb,
to_x, to_y);
else
- gdk_pixbuf_composite (paste_pb, base_pb,
- to_x, to_y, w, h,
- to_x - from_x, to_y - from_y,
- 1.0, 1.0,
- GDK_INTERP_HYPER,
- opacity * 255);
+ {
+ from_x++; /* gdk_pixbuf_composite gets confused about the bevel: */
+ from_y++; /* it leaves a stripe on the top and left if we try to */
+ to_x++; /* start at 0,0, so pull it right and down by 1 pixel. */
+ to_y++; /* (problem seen in gtk2-2.4.14-2.fc3) */
+ w--;
+ h--;
+
+ if (w > 0 && h > 0)
+ gdk_pixbuf_composite (paste_pb, base_pb,
+ to_x, to_y, w, h,
+ to_x - from_x, to_y - from_y,
+ 1.0, 1.0,
+ GDK_INTERP_HYPER,
+ opacity * 255);
+ }
if (verbose_p)
fprintf (stderr, "%s: pasted %dx%d from %d,%d to %d,%d\n",
perror (buf);
exit (1);
}
- fprintf (stderr, " %ldK\n", (st.st_size + 1023) / 1024);
+ fprintf (stderr, " %luK\n", ((unsigned long) st.st_size + 1023) / 1024);
}
fclose (out);
int i;
char *paste_file, *base_file, *s, dummy;
double from_scale, opacity;
- int from_x, from_y, to_x, to_y, w, h;
+ int from_x, from_y, to_x, to_y, w, h, bevel_pct;
i = 0;
progname = argv[i++];
s = argv[i++]; if (1 != sscanf (s, " %d %c", &w, &dummy)) usage();
s = argv[i++]; if (1 != sscanf (s, " %d %c", &h, &dummy)) usage();
+ bevel_pct = 10; /* #### */
+
if (w < 0) usage();
if (h < 0) usage();
#endif /* HAVE_GTK2 */
paste (paste_file, base_file,
- from_scale, opacity,
+ from_scale, opacity, bevel_pct,
from_x, from_y, to_x, to_y,
w, h);
exit (0);
projects / xscreensaver / blobdiff