170 lines
3.0 KiB
C++
170 lines
3.0 KiB
C++
/*
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* compile with:
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*
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* g++ -g -Wall try92.cc `pkg-config vips --cflags --libs`
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*
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*/
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#include <vips/vips.h>
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enum VSteal {
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NOSTEAL = 0,
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STEAL = 1
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};
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class VObject
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{
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private:
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GObject *gobject;
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public:
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VObject( GObject *new_gobject, VSteal steal = STEAL ) :
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gobject( new_gobject )
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{
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printf( "VObject constructor, obj = %p, steal = %d\n",
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new_gobject, steal );
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if( !steal ) {
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printf( " reffing object\n" );
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g_object_ref( gobject );
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}
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}
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// copy constructor
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VObject( const VObject &vobject ) :
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gobject( vobject.gobject )
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{
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printf( "VObject copy constructor, obj = %p\n",
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gobject );
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g_object_ref( gobject );
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printf( " reffing object\n" );
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}
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// assignment ... we must delete the old ref
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VObject &operator=( const VObject &a )
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{
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GObject *old_gobject;
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printf( "VObject assignment\n" );
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printf( " reffing %p\n", a.gobject );
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printf( " unreffing %p\n", gobject );
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// delete the old ref at the end ... otherwise "a = a;" could
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// unref before reffing again
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old_gobject = gobject;
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gobject = a.gobject;
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g_object_ref( gobject );
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g_object_unref( old_gobject );
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return( *this );
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}
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~VObject()
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{
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printf( "VObject destructor\n" );
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printf( " unreffing %p\n", gobject );
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g_object_unref( gobject );
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}
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GObject &operator*()
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{
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return( *gobject );
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}
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GObject *operator->()
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{
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return( gobject );
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}
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GObject *get()
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{
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return( gobject );
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}
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};
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class VImage : VObject
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{
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public:
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VImage( VipsImage *image, VSteal steal = STEAL ) :
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VObject( (GObject *) image, steal )
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{
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}
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VipsImage *get()
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{
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return( (VipsImage *) VObject::get() );
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}
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};
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int
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main( int argc, char **argv )
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{
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GOptionContext *context;
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GOptionGroup *main_group;
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GError *error = NULL;
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if( vips_init( argv[0] ) )
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vips_error_exit( NULL );
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context = g_option_context_new( "" );
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main_group = g_option_group_new( NULL, NULL, NULL, NULL, NULL );
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g_option_context_set_main_group( context, main_group );
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g_option_context_add_group( context, vips_get_option_group() );
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if( !g_option_context_parse( context, &argc, &argv, &error ) ) {
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if( error ) {
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fprintf( stderr, "%s\n", error->message );
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g_error_free( error );
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}
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vips_error_exit( NULL );
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}
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/*
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VipsImage *in;
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VipsImage *out;
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if( !(in = vips_image_new_from_file( argv[1], NULL )) )
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vips_error_exit( NULL );
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if( vips_invert( in, &out, NULL ) )
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vips_error_exit( NULL );
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if( vips_image_write_to_file( out, argv[2], NULL ) )
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vips_error_exit( NULL );
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g_object_unref( in );
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g_object_unref( out );
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*/
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printf( "sizeof( VipsImage *) = %zd\n", sizeof( VipsImage *) );
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printf( "sizeof( VImage ) = %zd\n", sizeof( VImage ) );
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{
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VipsImage *im;
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if( !(im = vips_image_new_from_file( argv[1], NULL )) )
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vips_error_exit( NULL );
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VImage in( im );
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VipsImage *out;
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if( vips_invert( in, &out, NULL ) )
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vips_error_exit( NULL );
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if( vips_image_write_to_file( out, argv[2], NULL ) )
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vips_error_exit( NULL );
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g_object_unref( out );
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}
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vips_shutdown();
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return( 0 );
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}
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