1 files changed, 162 insertions, 0 deletions

diff --git a/src/plugins/old/thumbnailgtk_extractor.c b/src/plugins/old/thumbnailgtk_extractor.c
new file mode 100644
index 0000000..51e3ea4
--- /dev/null
+++ b/src/plugins/old/thumbnailgtk_extractor.c
@@ -0,0 +1,162 @@
+/*
+     This file is part of libextractor.
+     (C) 2005, 2009 Vidyut Samanta and Christian Grothoff
+
+     libextractor is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 2, or (at your
+     option) any later version.
+
+     libextractor is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with libextractor; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * @file thumbnailextractor.c
+ * @author Christian Grothoff
+ * @brief this extractor produces a binary (!) encoded
+ * thumbnail of images (using gdk pixbuf).  The bottom
+ * of the file includes a decoder method that can be used
+ * to reproduce the 128x128 PNG thumbnails.
+ */
+
+#include "platform.h"
+#include "extractor.h"
+#include <glib.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+#define THUMBSIZE 128
+
+/* using libgobject, needs init! */
+void __attribute__ ((constructor)) ole_gobject_init ()
+{
+  g_type_init ();
+}
+
+
+const char *
+EXTRACTOR_thumbnailgtk_options ()
+{
+  /* 
+     Since the Gnome developers think that being unable to
+     unload plugins is an 'acceptable' limitation, we
+     require out-of-process execution for plugins depending
+     on libgsf and other glib-based plugins.
+     See also https://bugzilla.gnome.org/show_bug.cgi?id=374940 
+  */
+  return "oop-only"; 
+}
+
+
+int 
+EXTRACTOR_thumbnailgtk_extract (const char *data,
+                                size_t size,
+                                EXTRACTOR_MetaDataProcessor proc,
+                                void *proc_cls,
+                                const char *options)
+{
+  GdkPixbufLoader *loader;
+  GdkPixbuf *in;
+  GdkPixbuf *out;
+  size_t length;
+  char *thumb;
+  unsigned long width;
+  unsigned long height;
+  char format[64];
+  int ret;
+
+  loader = gdk_pixbuf_loader_new ();
+  gdk_pixbuf_loader_write (loader, 
+                           (const unsigned char*) data, 
+                           size, NULL);
+  in = gdk_pixbuf_loader_get_pixbuf (loader);
+  gdk_pixbuf_loader_close (loader, NULL);
+  if (in == NULL)
+    {
+      g_object_unref (loader);
+      return 0;
+    }
+  g_object_ref (in);
+  g_object_unref (loader);
+  height = gdk_pixbuf_get_height (in);
+  width = gdk_pixbuf_get_width (in);
+  snprintf (format, 
+            sizeof(format),
+            "%ux%u",
+            (unsigned int) width, 
+            (unsigned int) height);
+  if (0 != proc (proc_cls,
+                 "thumbnailgtk",
+                 EXTRACTOR_METATYPE_IMAGE_DIMENSIONS,
+                 EXTRACTOR_METAFORMAT_UTF8,
+                 "text/plain",
+                 format,
+                 strlen (format) + 1))
+    {
+      g_object_unref (in);
+      return 1;
+    }
+  if ((height <= THUMBSIZE) && (width <= THUMBSIZE))
+    {
+      g_object_unref (in);
+      return 0;
+    }
+  if (height > THUMBSIZE)
+    {
+      width = width * THUMBSIZE / height;
+      height = THUMBSIZE;
+    }
+  if (width > THUMBSIZE)
+    {
+      height = height * THUMBSIZE / width;
+      width = THUMBSIZE;
+    }
+  if ( (height == 0) || (width == 0) )
+    {
+      g_object_unref (in);
+      return 0;
+    }
+  out = gdk_pixbuf_scale_simple (in, width, height, GDK_INTERP_BILINEAR);
+  g_object_unref (in);
+  thumb = NULL;
+  length = 0;
+  if (out == NULL)
+    return 0;
+  if (!gdk_pixbuf_save_to_buffer (out, &thumb, &length, "png", NULL, 
+                                  "compression", "9", NULL))
+    {
+      g_object_unref (out);
+      return 0;
+    }
+  g_object_unref (out);
+  if (thumb == NULL)
+    return 0;
+  ret = proc (proc_cls,
+              "thumbnailgtk",
+              EXTRACTOR_METATYPE_THUMBNAIL,
+              EXTRACTOR_METAFORMAT_BINARY,
+              "image/png",
+              thumb, length);  
+  free (thumb);
+  return ret;
+}
+
+int 
+EXTRACTOR_thumbnail_extract (const char *data,
+                             size_t size,
+                             EXTRACTOR_MetaDataProcessor proc,
+                             void *proc_cls,
+                             const char *options)
+{
+  return EXTRACTOR_thumbnailgtk_extract (data, size, proc, proc_cls, options);
+}
+
+
+/* end of thumbnailgtk_extractor.c */