more JPEG support. added input file handler API.

2026-02-23 15:53:09 +00:00 · 2003-03-20 06:54:08 +00:00
parent e68a6fb9a0
commit e08fd46185
9 changed files with 774 additions and 451 deletions
--- a/tumble_input.c
+++ b/tumble_input.c
@@ -0,0 +1,140 @@
+/*
+ * tumble: build a PDF file from image files
+ *
+ * Input handler dispatch
+ * $Id: tumble_input.c,v 1.1 2003/03/19 22:54:08 eric Exp $
+ * Copyright 2001, 2002, 2003 Eric Smith <eric@brouhaha.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.  Note that permission is
+ * not granted to redistribute this program under the terms of any
+ * other version of the General Public License.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA
+ */
+
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+#include "semantics.h"
+#include "tumble.h"
+#include "bitblt.h"
+#include "pdf.h"
+#include "tumble_input.h"
+
+
+#define MAX_INPUT_HANDLERS 10
+
+static int input_handler_count = 0;
+
+static input_handler_t *input_handlers [MAX_INPUT_HANDLERS];
+
+
+static char *in_filename;
+static FILE *in;
+static input_handler_t *current_input_handler;
+
+
+void install_input_handler (input_handler_t *handler)
+{
+  if (input_handler_count >= MAX_INPUT_HANDLERS)
+    fprintf (stderr, "Too many input handlers, table only has room for %d\n", MAX_INPUT_HANDLERS);
+  else
+    input_handlers [input_handler_count++] = handler;
+}
+
+
+bool open_input_file (char *name)
+{
+  int i;
+
+  if (in)
+    {
+      if (strcmp (name, in_filename) == 0)
+	return (1);
+      close_input_file ();
+    }
+  in_filename = strdup (name);
+  if (! in_filename)
+    {
+      fprintf (stderr, "can't strdup input filename '%s'\n", name);
+      goto fail;
+    }
+
+  in = fopen (name, "rb");
+  if (! in)
+    goto fail;
+
+  for (i = 0; i < input_handler_count; i++)
+    {
+      if (input_handlers [i]->open_input_file (in, name))
+	break;
+    }
+  if (i >= input_handler_count)
+    {
+      fprintf (stderr, "unrecognized format for input file '%s'\n", name);
+      goto fail;
+    }
+  current_input_handler = input_handlers [i];
+  return (1);
+
+ fail:
+  if (in)
+    fclose (in);
+  in = NULL;
+  return (0);
+}
+
+
+bool close_input_file (void)
+{
+  bool result;
+
+  result = current_input_handler->close_input_file ();
+  if (in_filename)
+    free (in_filename);
+  fclose (in);
+  in = NULL;
+
+  return (result);
+}
+
+
+bool last_input_page (void)
+{
+  return (current_input_handler->last_input_page ());
+}
+
+
+bool get_image_info (int image,
+		     input_attributes_t input_attributes,
+		     image_info_t *image_info)
+{
+  return (current_input_handler->get_image_info (image,
+						 input_attributes,
+						 image_info));
+}
+
+bool process_image (int image,
+		    input_attributes_t input_attributes,
+		    image_info_t *image_info,
+		    pdf_page_handle page)
+{
+  return (current_input_handler->process_image (image,
+						input_attributes,
+						image_info,
+						page));
+}