54 lines
983 B
C++
54 lines
983 B
C++
/*
|
|
* compile with:
|
|
*
|
|
* g++ -g -Wall avg.cc `pkg-config vips-cc --cflags --libs`
|
|
*
|
|
*/
|
|
|
|
#define DEBUG
|
|
|
|
#include <vips/vips8>
|
|
|
|
using namespace vips8;
|
|
|
|
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_UNBUFFERED ) );
|
|
double avg;
|
|
|
|
avg = in.avg();
|
|
|
|
printf( "avg = %g\n", avg );
|
|
}
|
|
|
|
vips_shutdown();
|
|
|
|
return( 0 );
|
|
}
|