44 lines
989 B
C
44 lines
989 B
C
/* Example showing how to call a couple of vips functions using an input
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* image file and creating an output file
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* also gathers some info on the input image
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*/
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#include <stdio.h>
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#include <vips/vips.h>
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int
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main( int argc, char **argv )
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{
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VipsImage *in;
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double mean;
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VipsImage *out;
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if( VIPS_INIT( argv[0] ) )
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vips_error_exit( NULL );
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if( argc != 3 )
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vips_error_exit( "usage: %s infile outfile", argv[0] );
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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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printf( "image width = %d\n", vips_image_get_width( in ) );
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if( vips_avg( in, &mean, NULL ) )
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vips_error_exit( NULL );
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printf( "mean pixel value = %g\n", mean );
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/* generate photo nexative - replace with other vips_ funcs */
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if( vips_invert( in, &out, NULL ) )
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vips_error_exit( NULL );
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g_object_unref( in );
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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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return( 0 );
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}
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