start jpeg save

TODO

@@ -1,9 +1,9 @@
-- get image.c using the new system
+- try jpeg save
+
+  get image.c using the new system
 
   move format/* to deprecated
 
-  try jpeg save
-
   try tiff load
 
 

libvips/file/jpegsave.c

@@ -0,0 +1,164 @@
+/* save to jpeg
+ *
+ * 28/11/03 JC
+ *	- better no-overshoot on tile loop
+ * 12/11/04
+ *	- better demand size choice for eval
+ * 30/6/05 JC
+ *	- update im_error()/im_warn()
+ *	- now loads and saves exif data
+ * 30/7/05
+ * 	- now loads ICC profiles
+ * 	- now saves ICC profiles from the VIPS header
+ * 24/8/05
+ * 	- jpeg load sets vips xres/yres from exif, if possible
+ * 	- jpeg save sets exif xres/yres from vips, if possible
+ * 29/8/05
+ * 	- cut from old vips_jpeg.c
+ * 20/4/06
+ * 	- auto convert to sRGB/mono for save
+ * 13/10/06
+ * 	- add </libexif/ prefix if required
+ * 19/1/07
+ * 	- oop, libexif confusion
+ * 2/11/07
+ * 	- use im_wbuffer() API for BG writes
+ * 15/2/08
+ * 	- write CMYK if Bands == 4 and Type == CMYK
+ * 12/5/09
+ *	- fix signed/unsigned warning
+ * 13/8/09
+ * 	- allow "none" for profile, meaning don't embed one
+ * 4/2/10
+ * 	- gtkdoc
+ * 17/7/10
+ * 	- use g_assert()
+ * 	- allow space for the header in init_destination(), helps writing very
+ * 	  small JPEGs (thanks Tim Elliott)
+ * 18/7/10
+ * 	- collect im_vips2bufjpeg() output in a list of blocks ... we no
+ * 	  longer overallocate or underallocate
+ * 8/7/11
+ * 	- oop CMYK write was not inverting, thanks Ole
+ * 12/10/2011
+ * 	- write XMP data
+ * 18/10/2011
+ * 	- update Orientation as well
+ * 3/11/11
+ * 	- rebuild exif tags from coded metadata values 
+ * 24/11/11
+ * 	- rework as a class
+ */
+
+/*
+
+    This file is part of VIPS.
+    
+    VIPS is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    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 Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+ */
+
+/*
+
+    These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
+
+ */
+
+/*
+#define DEBUG_VERBOSE
+#define DEBUG
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif /*HAVE_CONFIG_H*/
+#include <vips/intl.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <setjmp.h>
+
+#ifdef HAVE_EXIF
+#ifdef UNTAGGED_EXIF
+#include <exif-data.h>
+#include <exif-loader.h>
+#include <exif-ifd.h>
+#include <exif-utils.h>
+#else /*!UNTAGGED_EXIF*/
+#include <libexif/exif-data.h>
+#include <libexif/exif-loader.h>
+#include <libexif/exif-ifd.h>
+#include <libexif/exif-utils.h>
+#endif /*UNTAGGED_EXIF*/
+#endif /*HAVE_EXIF*/
+
+#include <vips/vips.h>
+#include <vips/buf.h>
+#include <vips/internal.h>
+
+/* jpeglib includes jconfig.h, which can define HAVE_STDLIB_H ... which we
+ * also define. Make sure it's turned off.
+ */
+#ifdef HAVE_STDLIB_H
+#undef HAVE_STDLIB_H
+#endif /*HAVE_STDLIB_H*/
+
+#include <jpeglib.h>
+#include <jerror.h>
+
+typedef struct _VipsFileSaveJpeg {
+	VipsFileSave parent_object;
+
+
+} VipsFileSaveJpeg;
+
+typedef VipsFileSaveClass VipsFileSaveJpegClass;
+
+G_DEFINE_TYPE( VipsFileSaveJpeg, vips_file_save_jpeg, VIPS_TYPE_FILE_SAVE );
+
+static int
+vips_file_load_save_build( VipsObject *object )
+{
+	VipsFileSaveJpeg *jpeg = (VipsFileSaveJpeg *) object;
+
+	if( VIPS_OBJECT_CLASS( vips_file_save_jpeg_parent_class )->
+		build( object ) )
+		return( -1 );
+
+	return( 0 );
+}
+
+static void
+vips_file_save_jpeg_class_init( VipsFileLoadJpegClass *class )
+{
+	GObjectClass *gobject_class = G_OBJECT_CLASS( class );
+	VipsObjectClass *object_class = (VipsObjectClass *) class;
+	VipsFileSaveClass *save_class = (VipsFileSaveClass *) class;
+
+	gobject_class->set_property = vips_object_set_property;
+	gobject_class->get_property = vips_object_get_property;
+
+	object_class->nickname = "jpegsave";
+	object_class->description = _( "save jpeg from file" );
+	object_class->build = vips_file_save_jpeg_build;
+
+}
+
+static void
+vips_file_save_jpeg_init( VipsFileSaveJpeg *jpeg )
+{
+}
+