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-rw-r--r--hacks/webcollage-helper.c592
1 files changed, 592 insertions, 0 deletions
diff --git a/hacks/webcollage-helper.c b/hacks/webcollage-helper.c
new file mode 100644
index 0000000..46ec608
--- /dev/null
+++ b/hacks/webcollage-helper.c
@@ -0,0 +1,592 @@
+/* webcollage-helper --- scales and pastes one image into another
+ * xscreensaver, Copyright (c) 2002-2017 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.
+ */
+
+/* This is the GDK + JPEGlib implementation. See webcollage-helper-cocoa.m
+ for the Cocoa implementation.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#if defined(HAVE_GDK_PIXBUF) && defined(HAVE_JPEGLIB) /* whole file */
+
+#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>
+
+
+char *progname;
+static int verbose_p = 0;
+
+static void add_jpeg_comment (struct jpeg_compress_struct *cinfo);
+static void write_pixbuf (GdkPixbuf *pb, const char *file);
+
+static GdkPixbuf *
+load_pixbuf (const char *file)
+{
+ GdkPixbuf *pb;
+#ifdef HAVE_GTK2
+ GError *err = NULL;
+
+ pb = gdk_pixbuf_new_from_file (file, &err);
+#else /* !HAVE_GTK2 */
+ pb = gdk_pixbuf_new_from_file (file);
+#endif /* HAVE_GTK2 */
+
+ if (!pb)
+ {
+#ifdef HAVE_GTK2
+ fprintf (stderr, "%s: %s\n", progname, err->message);
+ g_error_free (err);
+#else /* !HAVE_GTK2 */
+ fprintf (stderr, "%s: unable to load %s\n", progname, file);
+#endif /* !HAVE_GTK2 */
+ exit (1);
+ }
+
+ 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);
+ g_object_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, int bevel_pct,
+ int from_x, int from_y, int to_x, int to_y,
+ int w, int h)
+{
+ GdkPixbuf *paste_pb;
+ GdkPixbuf *base_pb;
+
+ int paste_w, paste_h;
+ int base_w, base_h;
+
+ paste_pb = load_pixbuf (paste_file);
+ base_pb = load_pixbuf (base_file);
+
+ paste_w = gdk_pixbuf_get_width (paste_pb);
+ paste_h = gdk_pixbuf_get_height (paste_pb);
+
+ base_w = gdk_pixbuf_get_width (base_pb);
+ base_h = gdk_pixbuf_get_height (base_pb);
+
+ if (verbose_p)
+ {
+ fprintf (stderr, "%s: loaded %s: %dx%d\n",
+ progname, base_file, base_w, base_h);
+ fprintf (stderr, "%s: loaded %s: %dx%d\n",
+ progname, paste_file, paste_w, paste_h);
+ }
+
+ if (from_scale != 1.0)
+ {
+ int new_w = paste_w * from_scale;
+ int new_h = paste_h * from_scale;
+ GdkPixbuf *new_pb = gdk_pixbuf_scale_simple (paste_pb, new_w, new_h,
+ GDK_INTERP_HYPER);
+ g_object_unref (paste_pb);
+ paste_pb = new_pb;
+ paste_w = gdk_pixbuf_get_width (paste_pb);
+ paste_h = gdk_pixbuf_get_height (paste_pb);
+
+ if (verbose_p)
+ fprintf (stderr, "%s: %s: scaled to %dx%d (%.2f)\n",
+ progname, paste_file, paste_w, paste_h, from_scale);
+ }
+
+ if (w == 0) w = paste_w - from_x;
+ if (h == 0) h = paste_h - from_y;
+
+ {
+ int ofx = from_x;
+ int ofy = from_y;
+ int otx = to_x;
+ int oty = to_y;
+ int ow = w;
+ int oh = h;
+
+ int clipped = 0;
+
+ if (from_x < 0) /* from left out of bounds */
+ {
+ w += from_x;
+ from_x = 0;
+ clipped = 1;
+ }
+
+ if (from_y < 0) /* from top out of bounds */
+ {
+ h += from_y;
+ from_y = 0;
+ clipped = 1;
+ }
+
+ if (to_x < 0) /* to left out of bounds */
+ {
+ w += to_x;
+ from_x -= to_x;
+ to_x = 0;
+ clipped = 1;
+ }
+
+ if (to_y < 0) /* to top out of bounds */
+ {
+ h += to_y;
+ from_y -= to_y;
+ to_y = 0;
+ clipped = 1;
+ }
+
+ if (from_x + w > paste_w) /* from right out of bounds */
+ {
+ w = paste_w - from_x;
+ clipped = 1;
+ }
+
+ if (from_y + h > paste_h) /* from bottom out of bounds */
+ {
+ h = paste_h - from_y;
+ clipped = 1;
+ }
+
+ if (to_x + w > base_w) /* to right out of bounds */
+ {
+ w = base_w - to_x;
+ clipped = 1;
+ }
+
+ if (to_y + h > base_h) /* to bottom out of bounds */
+ {
+ h = base_h - to_y;
+ clipped = 1;
+ }
+
+
+ if (clipped && verbose_p)
+ {
+ fprintf (stderr, "clipped from: %dx%d %d,%d %d,%d\n",
+ ow, oh, ofx, ofy, otx, oty);
+ fprintf (stderr, "clipped to: %dx%d %d,%d %d,%d\n",
+ w, h, from_x, from_y, to_x, to_y);
+ }
+ }
+
+ 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
+ {
+ 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",
+ progname, paste_w, paste_h, from_x, from_y, to_x, to_y);
+
+ g_object_unref (paste_pb);
+ write_pixbuf (base_pb, base_file);
+ g_object_unref (base_pb);
+}
+
+
+static guint32
+parse_color (const char *s)
+{
+ static const char hex[128] =
+ {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0,
+ 0, 10,11,12,13,14,15,0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 10,11,12,13,14,15,0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+
+ unsigned char r=0, g=0, b=0;
+
+ if (!strcasecmp (s, "black")) ;
+ else if (!strcasecmp (s, "white")) r = g = b = 0xFF;
+ else if (!strcasecmp (s, "red")) r = 0xFF;
+ else if (!strcasecmp (s, "green")) g = 0xFF;
+ else if (!strcasecmp (s, "blue")) b = 0xFF;
+ else
+ {
+ if (*s != '#' || strlen(s) != 7)
+ {
+ fprintf (stderr, "%s: unparsable color: \"%s\"\n", progname, s);
+ exit (1);
+ }
+ s++;
+ r = (hex[(int) s[0]] << 4) | hex[(int) s[1]], s += 2;
+ g = (hex[(int) s[0]] << 4) | hex[(int) s[1]], s += 2;
+ b = (hex[(int) s[0]] << 4) | hex[(int) s[1]], s += 2;
+ }
+
+ return (r << 16) | (g << 8) | b;
+}
+
+
+static void
+create (const char *color,
+ int w, int h,
+ const char *file)
+{
+ int i;
+ GdkPixbuf *pb;
+ guint32 pixel = parse_color (color);
+ unsigned char *bytes = malloc (w * h * 3);
+ if (!bytes) abort();
+ for (i = 0; i < w * h * 3; i += 3)
+ {
+ bytes[i] = 0xFF & (pixel >> 16);
+ bytes[i+1] = 0xFF & (pixel >> 8);
+ bytes[i+2] = 0xFF & (pixel);
+ }
+
+ pb = gdk_pixbuf_new_from_data (bytes, GDK_COLORSPACE_RGB,
+ FALSE, 8, /* alpha, sample size */
+ w, h,
+ w * 3, /* rowstride */
+ NULL, 0);
+ if (!pb) abort();
+ write_pixbuf (pb, file);
+ g_object_unref (pb);
+ free (bytes);
+}
+
+
+static void
+write_pixbuf (GdkPixbuf *pb, const char *file)
+{
+ int jpeg_quality = 85;
+
+ int w = gdk_pixbuf_get_width (pb);
+ int h = gdk_pixbuf_get_height (pb);
+ guchar *data = gdk_pixbuf_get_pixels (pb);
+ int ww = gdk_pixbuf_get_rowstride (pb);
+ int channels = gdk_pixbuf_get_n_channels (pb);
+
+ struct jpeg_compress_struct cinfo;
+ struct jpeg_error_mgr jerr;
+ FILE *out;
+
+ if (channels != 3)
+ {
+ fprintf (stderr, "%s: %d channels?\n", progname, channels);
+ exit (1);
+ }
+
+ cinfo.err = jpeg_std_error (&jerr);
+ jpeg_create_compress (&cinfo);
+
+ out = fopen (file, "wb");
+ if (!out)
+ {
+ char buf[255];
+ sprintf (buf, "%.100s: %.100s", progname, file);
+ perror (buf);
+ exit (1);
+ }
+ else if (verbose_p)
+ fprintf (stderr, "%s: writing %s...", progname, file);
+
+ jpeg_stdio_dest (&cinfo, out);
+
+ cinfo.image_width = w;
+ cinfo.image_height = h;
+ cinfo.input_components = channels;
+ cinfo.in_color_space = JCS_RGB;
+
+ jpeg_set_defaults (&cinfo);
+ jpeg_simple_progression (&cinfo);
+ jpeg_set_quality (&cinfo, jpeg_quality, TRUE);
+
+ jpeg_start_compress (&cinfo, TRUE);
+ add_jpeg_comment (&cinfo);
+
+ {
+ guchar *d = data;
+ guchar *end = d + (ww * h);
+ while (d < end)
+ {
+ jpeg_write_scanlines (&cinfo, &d, 1);
+ d += ww;
+ }
+ }
+
+ jpeg_finish_compress (&cinfo);
+ jpeg_destroy_compress (&cinfo);
+
+ if (verbose_p)
+ {
+ struct stat st;
+ fflush (out);
+ if (fstat (fileno (out), &st))
+ {
+ char buf[255];
+ sprintf (buf, "%.100s: %.100s", progname, file);
+ perror (buf);
+ exit (1);
+ }
+ fprintf (stderr, " %luK\n", ((unsigned long) st.st_size + 1023) / 1024);
+ }
+
+ fclose (out);
+}
+
+
+static void
+add_jpeg_comment (struct jpeg_compress_struct *cinfo)
+{
+ time_t now = time ((time_t *) 0);
+ struct tm *tm = localtime (&now);
+ const char fmt[] =
+ "\r\n"
+ " Generated by WebCollage: Exterminate All Rational Thought. \r\n"
+ " Copyright (c) 1999-%Y by Jamie Zawinski <jwz@jwz.org> \r\n"
+ "\r\n"
+ " https://www.jwz.org/webcollage/ \r\n"
+ "\r\n"
+ " This is what the web looked like on %d %b %Y at %I:%M:%S %p %Z. \r\n"
+ "\r\n";
+ char comment[sizeof(fmt) + 100];
+ strftime (comment, sizeof(comment)-1, fmt, tm);
+ jpeg_write_marker (cinfo, JPEG_COM,
+ (unsigned char *) comment,
+ strlen (comment));
+}
+
+
+static void
+usage (void)
+{
+ fprintf (stderr,
+ "\nusage: %s [-v] paste-file base-file\n"
+ "\t from-scale opacity\n"
+ "\t from-x from-y to-x to-y w h\n"
+ "\n"
+ "\t Pastes paste-file into base-file.\n"
+ "\t base-file will be overwritten (with JPEG data.)\n"
+ "\t scaling is applied first: coordinates apply to scaled image.\n"
+ "\n"
+ "usage: %s [-v] color width height output-file\n"
+ "\t Creates a new image of a solid color.\n\n",
+ progname, progname);
+ exit (1);
+}
+
+
+int
+main (int argc, char **argv)
+{
+ int i;
+ char *paste_file, *base_file, *s, dummy;
+ double from_scale, opacity;
+ int from_x, from_y, to_x, to_y, w, h, bevel_pct;
+
+ i = 0;
+ progname = argv[i++];
+ s = strrchr (progname, '/');
+ if (s) progname = s+1;
+
+ if (!strcmp(argv[i], "-v"))
+ verbose_p++, i++;
+
+ if (argc == 11 || argc == 12)
+ {
+ paste_file = argv[i++];
+ base_file = argv[i++];
+
+ if (*paste_file == '-') usage();
+ if (*base_file == '-') usage();
+
+ s = argv[i++];
+ if (1 != sscanf (s, " %lf %c", &from_scale, &dummy)) usage();
+ if (from_scale <= 0 || from_scale > 100) usage();
+
+ s = argv[i++];
+ if (1 != sscanf (s, " %lf %c", &opacity, &dummy)) usage();
+ if (opacity <= 0 || opacity > 1) usage();
+
+ s = argv[i++]; if (1 != sscanf (s, " %d %c", &from_x, &dummy)) usage();
+ s = argv[i++]; if (1 != sscanf (s, " %d %c", &from_y, &dummy)) usage();
+ s = argv[i++]; if (1 != sscanf (s, " %d %c", &to_x, &dummy)) usage();
+ s = argv[i++]; if (1 != sscanf (s, " %d %c", &to_y, &dummy)) usage();
+ 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();
+
+# ifdef HAVE_GTK2
+# if !GLIB_CHECK_VERSION(2, 36 ,0)
+ g_type_init ();
+# endif
+# endif /* HAVE_GTK2 */
+
+ paste (paste_file, base_file,
+ from_scale, opacity, bevel_pct,
+ from_x, from_y, to_x, to_y,
+ w, h);
+ }
+ else if (argc == 4 || argc == 5)
+ {
+ char *color = 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();
+ paste_file = argv[i++];
+ if (*paste_file == '-') usage();
+
+ create (color, w, h, paste_file);
+ }
+ else
+ {
+ usage();
+ }
+
+ exit (0);
+}
+
+#endif /* HAVE_GDK_PIXBUF && HAVE_JPEGLIB -- whole file */
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-05-18 04:12:21 +0200