--- /dev/null
+/* webcollage-helper --- scales and pastes one image into another
+ * xscreensaver, Copyright (c) 2002 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.
+ */
+
+#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 <string.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/stat.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 void
+paste (const char *paste_file,
+ const char *base_file,
+ double from_scale,
+ double opacity,
+ 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 = gdk_pixbuf_new_from_file (paste_file);
+
+ if (!paste_pb)
+ {
+ fprintf (stderr, "%s: unable to load %s\n", progname, paste_file);
+ exit (1);
+ }
+
+ base_pb = gdk_pixbuf_new_from_file (base_file);
+ if (!base_pb)
+ {
+ fprintf (stderr, "%s: unable to load %s\n", progname, base_file);
+ exit (1);
+ }
+
+ 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);
+ gdk_pixbuf_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 (opacity == 1.0)
+ 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);
+
+ 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);
+
+ gdk_pixbuf_unref (paste_pb);
+ write_pixbuf (base_pb, base_file);
+ gdk_pixbuf_unref (base_pb);
+}
+
+
+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);
+ 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);
+ cinfo.progressive_mode = TRUE;
+ 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, " %dK\n", (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"
+ " http://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, comment, strlen (comment));
+}
+
+
+static void
+usage (void)
+{
+ fprintf (stderr, "usage: %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",
+ 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;
+
+ i = 0;
+ progname = argv[i++];
+ s = strrchr (progname, '/');
+ if (s) progname = s+1;
+
+ if (argc != 11 && argc != 12) usage();
+
+ if (!strcmp(argv[i], "-v"))
+ verbose_p++, i++;
+
+ 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();
+
+ if (w < 0) usage();
+ if (h < 0) usage();
+
+ paste (paste_file, base_file,
+ from_scale, opacity,
+ from_x, from_y, to_x, to_y,
+ w, h);
+ exit (0);
+}
+
+#endif /* HAVE_GDK_PIXBUF && HAVE_JPEGLIB -- whole file */
projects / xscreensaver / blobdiff