add VInterpolate wrapper class

to cplusplus, see https://github.com/jcupitt/libvips/issues/230

ChangeLog

@@ -14,6 +14,7 @@
 - rename vipsthumbnail -o as -f, -o stays as a hidden flag
 - fix some small leaks
 - faster openslide load, thanks Benjamin
+- add VInterpolate class to cplusplus binding, thanks Lovell
 
 24/12/14 started 7.42.1
 - add gobject-2.0 to Requires: in vips and vips-cpp .pc files

cplusplus/Makefile.am

@@ -10,6 +10,7 @@ lib_LTLIBRARIES = libvips-cpp.la
 
 libvips_cpp_la_SOURCES = \
 	VImage.cpp \
+	VInterpolate.cpp \
 	VError.cpp 
 
 libvips_cpp_la_LDFLAGS = \

cplusplus/VInterpolate.cpp

@@ -0,0 +1,77 @@
+/* Object part of VInterpolate class
+ */
+
+/*
+
+    Copyright (C) 1991-2001 The National Gallery
+
+    This program 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., 51 Franklin Street, Fifth Floor, Boston, MA
+    02110-1301  USA
+
+ */
+
+/*
+
+    These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
+
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif /*HAVE_CONFIG_H*/
+#include <vips/intl.h>
+
+#include <vips/vips8>
+
+#include <vips/debug.h>
+
+/*
+#define VIPS_DEBUG
+#define VIPS_DEBUG_VERBOSE
+ */
+
+VIPS_NAMESPACE_START
+
+VInterpolate 
+VInterpolate::new_from_name( const char *name, VOption *options )
+	throw( VError )
+{
+	VipsInterpolate *interp;
+
+	if( !(interp = vips_interpolate_new( name )) ) {
+		delete options; 
+		throw VError(); 
+	}
+	delete options; 
+
+	VInterpolate out( interp ); 
+
+	return( out ); 
+}
+
+VOption *
+VOption::set( const char *name, VInterpolate value )
+{
+	Pair *pair = new Pair( name );
+
+	pair->input = true;
+	g_value_init( &pair->value, VIPS_TYPE_INTERPOLATE );
+	g_value_set_object( &pair->value, value.get_interpolate() );
+	options.push_back( pair );
+
+	return( this );
+}
+
+VIPS_NAMESPACE_END

cplusplus/examples/resize.cpp

@@ -0,0 +1,54 @@
+/* 
+ * compile with:
+ *
+ *      g++ -g -Wall resize.cpp `pkg-config vips-cpp --cflags --libs`
+ *
+ */
+
+#define DEBUG
+
+#include <vips/vips8>
+
+using namespace vips;
+
+int
+main( int argc, char **argv )
+{
+	GOptionContext *context;
+	GOptionGroup *main_group;
+	GError *error = NULL;
+
+	if( vips_init( argv[0] ) )
+		vips_error_exit( NULL ); 
+
+	context = g_option_context_new( "" ); 
+
+	main_group = g_option_group_new( NULL, NULL, NULL, NULL, NULL );
+	g_option_context_set_main_group( context, main_group );
+	g_option_context_add_group( context, vips_get_option_group() );
+
+	if( !g_option_context_parse( context, &argc, &argv, &error ) ) {
+		if( error ) {
+			fprintf( stderr, "%s\n", error->message );
+			g_error_free( error );
+		}
+
+		vips_error_exit( NULL );
+	}
+
+{ 
+	VImage in = VImage::new_from_file( argv[1], 
+		VImage::option()->set( "access", VIPS_ACCESS_SEQUENTIAL ) ); 
+	VInterpolate interp = VInterpolate::new_from_name( "nohalo" );
+
+	VImage out; 
+
+	out = in.resize( 0.2, VImage::option()->set( "interpolate", interp ) );
+
+	out.write_to_file( argv[2] );
+}
+
+	vips_shutdown();
+
+        return( 0 );
+}

cplusplus/include/vips/Makefile.am

@@ -1,6 +1,7 @@
 pkginclude_HEADERS = \
 	VError8.h \
 	VImage8.h \
+	VInterpolate8.h \
 	vips8 \
 	vips-operators.h 
 

cplusplus/include/vips/VImage8.h

@@ -163,6 +163,7 @@ public:
 };
 
 class VImage; 
+class VInterpolate; 
 class VOption; 
 
 class VOption
@@ -215,6 +216,7 @@ public:
 	VOption *set( const char *name, double value );
 	VOption *set( const char *name, const char *value );
 	VOption *set( const char *name, VImage value );
+	VOption *set( const char *name, VInterpolate value ); 
 	VOption *set( const char *name, std::vector<VImage> value );
 	VOption *set( const char *name, std::vector<double> value );
 	VOption *set( const char *name, VipsBlob *value ); 

cplusplus/include/vips/VInterpolate8.h

@@ -0,0 +1,65 @@
+// VIPS interpolate wrapper
+
+/*
+
+    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., 51 Franklin Street, Fifth Floor, Boston, MA
+    02110-1301  USA
+
+ */
+
+/*
+
+    These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
+
+ */
+
+#ifndef VIPS_VINTERPOLATE_H
+#define VIPS_VINTERPOLATE_H
+
+#include <list>
+#include <complex>
+#include <vector>
+
+#include <string.h>
+
+#include <vips/vips.h>
+
+VIPS_NAMESPACE_START
+
+class VInterpolate : VObject
+{
+public:
+	VInterpolate( VipsInterpolate *interpolate, VSteal steal = STEAL ) : 
+		VObject( (VipsObject *) interpolate, steal )
+	{
+	}
+
+	static 
+	VInterpolate new_from_name( const char *name, VOption *options = 0 )
+		throw( VError );
+
+	VipsInterpolate *
+	get_interpolate()
+	{
+		return( (VipsInterpolate *) VObject::get_object() );
+	}
+
+};
+
+VIPS_NAMESPACE_END
+
+#endif /*VIPS_VIMAGE_H*/

cplusplus/include/vips/vips8

@@ -39,5 +39,6 @@
 
 #include "VError8.h"
 #include "VImage8.h"
+#include "VInterpolate8.h"
 
 #endif /*VIPS_CPLUSPLUS*/