libvips/cplusplus/VImage.cc

// Object part of VImage 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 DEBUG

VIPS_NAMESPACE_START

VOption::~VOption()
{
	std::list<Pair *>::iterator i;

	for( i = options.begin(); i != options.end(); i++ ) 
		delete *i;
}

// input bool
VOption *VOption::set( const char *name, bool value )
{
	Pair *pair = new Pair( name );

	pair->input = true;
	g_value_init( &pair->value, G_TYPE_BOOLEAN );
	g_value_set_boolean( &pair->value, value );
	options.push_back( pair );

	return( this );
}

// input int ... this path is used for enums as well
VOption *VOption::set( const char *name, int value )
{
	Pair *pair = new Pair( name );

	pair->input = true;
	g_value_init( &pair->value, G_TYPE_INT );
	g_value_set_int( &pair->value, value );
	options.push_back( pair );

	return( this );
}

// input double 
VOption *VOption::set( const char *name, double value )
{
	Pair *pair = new Pair( name );

	pair->input = true;
	g_value_init( &pair->value, G_TYPE_DOUBLE );
	g_value_set_double( &pair->value, value );
	options.push_back( pair );

	return( this );
}

VOption *VOption::set( const char *name, const char *value )
{
	Pair *pair = new Pair( name );

	pair->input = true;
	g_value_init( &pair->value, G_TYPE_STRING );
	g_value_set_string( &pair->value, value );
	options.push_back( pair );

	return( this );
}

// input image
VOption *VOption::set( const char *name, VImage value )
{
	Pair *pair = new Pair( name );

	pair->input = true;
	g_value_init( &pair->value, VIPS_TYPE_IMAGE );
	// we need to unbox
	g_value_set_object( &pair->value, value.get_image() );
	options.push_back( pair );

	return( this );
}

// input double array
VOption *VOption::set( const char *name, std::vector<double> value )
{
	Pair *pair = new Pair( name );

	double *array;
	unsigned int i; 

	pair->input = true;

	vips_value_set_array_double( &pair->value, NULL, value.size() ); 
	array = vips_value_get_array_double( &pair->value, NULL ); 

	for( i = 0; i < value.size(); i++ )  
		array[i] = value[i]; 

	options.push_back( pair );

	return( this );
}

// input image array
VOption *VOption::set( const char *name, std::vector<VImage> value )
{
	Pair *pair = new Pair( name );

	VipsImage **array;
	unsigned int i; 

	pair->input = true;

	vips_value_set_array_image( &pair->value, value.size() );
	array = vips_value_get_array_image( &pair->value, NULL );

	for( i = 0; i < value.size(); i++ ) { 
		VipsImage *vips_image = value[i].get_image();

		array[i] = vips_image; 
		g_object_ref( vips_image );  
	}

	options.push_back( pair );

	return( this );
}

// input blob
VOption *VOption::set( const char *name, VipsBlob *value )
{
	Pair *pair = new Pair( name );

	pair->input = true;
	g_value_init( &pair->value, VIPS_TYPE_BLOB );
	g_value_set_boxed( &pair->value, value );
	options.push_back( pair );

	return( this );
}

// output bool
VOption *VOption::set( const char *name, bool *value )
{
	Pair *pair = new Pair( name );

	// note where we will write the VImage on success
	pair->input = false;
	pair->vbool = value;
	g_value_init( &pair->value, G_TYPE_BOOLEAN );

	options.push_back( pair );

	return( this );
}

// output int
VOption *VOption::set( const char *name, int *value )
{
	Pair *pair = new Pair( name );

	// note where we will write the VImage on success
	pair->input = false;
	pair->vint = value;
	g_value_init( &pair->value, G_TYPE_INT );

	options.push_back( pair );

	return( this );
}

// output double
VOption *VOption::set( const char *name, double *value )
{
	Pair *pair = new Pair( name );

	// note where we will write the VImage on success
	pair->input = false;
	pair->vdouble = value;
	g_value_init( &pair->value, G_TYPE_DOUBLE );

	options.push_back( pair );

	return( this );
}

// output image
VOption *VOption::set( const char *name, VImage *value )
{
	Pair *pair = new Pair( name );

	// note where we will write the VImage on success
	pair->input = false;
	pair->vimage = value;
	g_value_init( &pair->value, VIPS_TYPE_IMAGE );

	options.push_back( pair );

	return( this );
}

// output doublearray
VOption *VOption::set( const char *name, std::vector<double> *value )
{
	Pair *pair = new Pair( name );

	// note where we will write the VImage on success
	pair->input = false;
	pair->vvector = value;

	options.push_back( pair );

	return( this );
}

// output blob
VOption *VOption::set( const char *name, VipsBlob **value )
{
	Pair *pair = new Pair( name );

	pair->input = false;
	pair->vblob = value;

	options.push_back( pair );

	return( this );
}

// walk the options and set props on the operation 
void VOption::set_operation( VipsOperation *operation )
{
	std::list<Pair *>::iterator i;

	for( i = options.begin(); i != options.end(); i++ ) 
		if( (*i)->input ) {
#ifdef DEBUG
			printf( "set_operation: " );
			vips_object_print_name( VIPS_OBJECT( operation ) );
			char *str_value = 
				g_strdup_value_contents( &(*i)->value );
			printf( ".%s = %s\n", (*i)->name, str_value );
			g_free( str_value );
#endif /*DEBUG*/

			g_object_set_property( G_OBJECT( operation ),
				(*i)->name, &(*i)->value );
		}
}

// walk the options and do any processing needed for output objects
void VOption::get_operation( VipsOperation *operation )
{
	std::list<Pair *>::iterator i;

	for( i = options.begin(); i != options.end(); i++ ) 
		if( not (*i)->input ) {
			const char *name = (*i)->name;
			GValue *value = &(*i)->value;

			g_object_get_property( G_OBJECT( operation ),
				name, value );

#ifdef DEBUG
			printf( "get_operation: " );
			vips_object_print_name( VIPS_OBJECT( operation ) );
			char *str_value = g_strdup_value_contents( value );
			printf( ".%s = %s\n", name, str_value );
			g_free( str_value );
#endif /*DEBUG*/

			GType type = G_VALUE_TYPE( value );
			if( type == VIPS_TYPE_IMAGE ) {
				// rebox object
				VipsImage *image = VIPS_IMAGE( 
					g_value_get_object( value ) );  
				*((*i)->vimage) = VImage( image ); 
			}
			else if( type == G_TYPE_INT ) 
				*((*i)->vint) = g_value_get_int( value ); 
			else if( type == G_TYPE_BOOLEAN ) 
				*((*i)->vbool) = g_value_get_boolean( value ); 
			else if( type == G_TYPE_DOUBLE ) 
				*((*i)->vdouble) = g_value_get_double( value ); 
			else if( type == VIPS_TYPE_ARRAY_DOUBLE ) {
				int length;
				double *array = 
					vips_value_get_array_double( value, 
					&length );
				int j;

				((*i)->vvector)->resize( length ); 
				for( j = 0; j < length; j++ )
					(*((*i)->vvector))[j] = array[j];
			}
			else if( type == VIPS_TYPE_BLOB ) {
				*((*i)->vblob) = 
					(VipsBlob *) g_value_get_boxed( value );
			}
		}
}

void VImage::call_option_string( const char *operation_name, 
	const char *option_string, VOption *options ) 
	throw( VError )
{
	VipsOperation *operation;

	VIPS_DEBUG_MSG( "vips_call_by_name: starting for %s ...\n", 
		operation_name );

	if( !(operation = vips_operation_new( operation_name )) ) {
		if( options )
			delete options;
		throw( VError() ); 
	}

	/* Set str options before vargs options, so the user can't 
	 * override things we set deliberately.
	 */
	if( option_string &&
		vips_object_set_from_string( VIPS_OBJECT( operation ), 
			option_string ) ) {
		vips_object_unref_outputs( VIPS_OBJECT( operation ) );
		g_object_unref( operation ); 
		delete options; 
		throw( VError() ); 
	}

	if( options )
		options->set_operation( operation );

	/* Build from cache.
	 */
	if( vips_cache_operation_buildp( &operation ) ) {
		vips_object_unref_outputs( VIPS_OBJECT( operation ) );
		delete options; 
		throw( VError() ); 
	}

	/* Walk args again, writing output.
	 */
	if( options )
		options->get_operation( operation );

	/* We're done with options!
	 */
	delete options; 

	/* The operation we have built should now have been reffed by 
	 * one of its arguments or have finished its work. Either 
	 * way, we can unref.
	 */
	g_object_unref( operation );
}

void VImage::call( const char *operation_name, VOption *options ) 
	throw( VError )
{
	call_option_string( operation_name, NULL, options ); 
}

VImage VImage::new_from_file( const char *name, VOption *options )
	throw( VError )
{
	char filename[VIPS_PATH_MAX];
	char option_string[VIPS_PATH_MAX];
	const char *operation_name;

	VImage out; 

	vips__filename_split8( name, filename, option_string );
	if( !(operation_name = vips_foreign_find_load( filename )) ) {
		delete options; 
		throw VError(); 
	}

	call_option_string( operation_name, option_string,
		(options ? options : VImage::option())-> 
			set( "filename", filename )->
			set( "out", &out ) );

	return( out ); 
}

void VImage::write_to_file( const char *name, VOption *options )
	throw( VError )
{
	char filename[VIPS_PATH_MAX];
	char option_string[VIPS_PATH_MAX];
	const char *operation_name;

	vips__filename_split8( name, filename, option_string );
	if( !(operation_name = vips_foreign_find_save( filename )) ) {
		delete options; 
		throw VError(); 
	}

	call_option_string( operation_name, option_string, 
		(options ? options : VImage::option())-> 
			set( "in", *this )->
			set( "filename", filename ) );
}

#include "vips-operators.cc"

VImage VImage::linear( double a, double b, VOption *options )
    throw( VError )
{
    double av[1] = { a }; 
    std::vector<double> avec( av, av + VIPS_NUMBER( av ) );

    double bv[1] = { b }; 
    std::vector<double> bvec( bv, bv + VIPS_NUMBER( bv ) );

    VImage out;

    call( "linear",
        (options ? options : VImage::option()) ->
            set( "out", &out ) ->
            set( "in", *this ) ->
            set( "a", avec ) ->
            set( "b", bvec ) );

    return( out );
}

std::vector<VImage> VImage::bandsplit( VOption *options )
	throw( VError )
{
	std::vector<VImage> bands; 

	for( int i = 0; i < this->bands(); i++ )
		bands.push_back( this->extract_band( i ) ); 

	return( bands ); 
}

VImage VImage::bandjoin( VImage other, VOption *options )
	throw( VError )
{
    VImage v[2] = { *this, other }; 
    std::vector<VImage> vec( v, v + VIPS_NUMBER( v ) );

    return( bandjoin( vec, options ) ); 
}

std::complex<double> VImage::minpos( VOption *options )
	throw( VError )
{
	double x, y;

	(void) this->min( 
		(options ? options : VImage::option()) ->
			set( "x", &x ) ->
			set( "y", &y ) );

	return( std::complex<double>( x, y ) ); 
}

std::complex<double> VImage::maxpos( VOption *options )
	throw( VError )
{
	double x, y;

	(void) this->max( 
		(options ? options : VImage::option()) ->
			set( "x", &x ) ->
			set( "y", &y ) );

	return( std::complex<double>( x, y ) ); 
}

VIPS_NAMESPACE_END