94 lines
2.0 KiB
C++
94 lines
2.0 KiB
C++
/*
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* compile with:
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*
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* g++ -g -Wall try.cc `pkg-config vips-cpp --cflags --libs`
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*
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*/
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#define DEBUG
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#include <vips/vips8>
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using namespace vips8;
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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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VImage in = VImage::new_from_file( argv[1],
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VImage::option()->set( "access", VIPS_ACCESS_SEQUENTIAL_UNBUFFERED ) );
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double avg;
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avg = in.avg();
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printf( "avg = %g\n", avg );
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}
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{
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VImage in = VImage::new_from_file( argv[1],
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VImage::option()->set( "access", VIPS_ACCESS_SEQUENTIAL_UNBUFFERED ) );
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VImage out = in.embed( 10, 10, 1000, 1000,
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VImage::option()->set( "extend", VIPS_EXTEND_BACKGROUND )->
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set( "background", 128 ) );
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out.write_to_file( "embed.jpg" );
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}
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{
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VImage in = VImage::new_from_file( argv[1],
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VImage::option()->set( "access", VIPS_ACCESS_SEQUENTIAL_UNBUFFERED ) );
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double a[] = { 1.0, 2.0, 3.0 };
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double b[] = { 4.0, 5.0, 6.0 };
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std::vector<double> avec( a, a + VIPS_NUMBER( a ) );
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std::vector<double> bvec( b, b + VIPS_NUMBER( b ) );
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VImage out = in.linear( avec, bvec );
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out.write_to_file( "linear.jpg" );
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}
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{
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VImage in = VImage::new_from_file( argv[1],
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VImage::option()->set( "access", VIPS_ACCESS_SEQUENTIAL_UNBUFFERED ) );
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VImage out = in.linear( 1, 2 );
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out.write_to_file( "linear1.jpg" );
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}
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{
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VImage in = VImage::new_from_file( argv[1] );
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VImage out = in.new_from_image( 128 );
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out.write_to_file( "const.jpg" );
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}
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vips_shutdown();
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return( 0 );
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}
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