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/* base class for all arithmetic operations
*/
/*
Copyright (C) 1991-2005 The National Gallery
This library 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 2.1 of the License, or (at your option) any later version.
This library 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 library; 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
*/
#ifndef VIPS_PARITHMETIC_H
#define VIPS_PARITHMETIC_H
#ifdef __cplusplus
extern "C" {
#endif /*__cplusplus*/
#include <vips/vips.h>
#include <vips/vector.h>
#define VIPS_TYPE_ARITHMETIC (vips_arithmetic_get_type())
#define VIPS_ARITHMETIC( obj ) \
(G_TYPE_CHECK_INSTANCE_CAST( (obj), \
VIPS_TYPE_ARITHMETIC, VipsArithmetic ))
#define VIPS_ARITHMETIC_CLASS( klass ) \
(G_TYPE_CHECK_CLASS_CAST( (klass), \
VIPS_TYPE_ARITHMETIC, VipsArithmeticClass))
#define VIPS_IS_ARITHMETIC( obj ) \
(G_TYPE_CHECK_INSTANCE_TYPE( (obj), VIPS_TYPE_ARITHMETIC ))
#define VIPS_IS_ARITHMETIC_CLASS( klass ) \
(G_TYPE_CHECK_CLASS_TYPE( (klass), VIPS_TYPE_ARITHMETIC ))
#define VIPS_ARITHMETIC_GET_CLASS( obj ) \
(G_TYPE_INSTANCE_GET_CLASS( (obj), \
VIPS_TYPE_ARITHMETIC, VipsArithmeticClass ))
struct _VipsArithmetic;
typedef void (*VipsArithmeticProcessFn)( struct _VipsArithmetic *arithmetic,
VipsPel *out, VipsPel **in, int width );
typedef struct _VipsArithmetic {
VipsOperation parent_instance;
/* All have an output image.
*/
VipsImage *out;
/* Array of input arguments, set these from a subclass.
*/
VipsImage **in;
int n;
/* The minimum number of output bands. For example, VipsLinear with a
* three element constant must make at least a three-band output.
*/
int base_bands;
/* The input images, ready for the operation.
*/
VipsImage **ready;
/* Set this to override class->format_table.
*/
VipsBandFormat format;
} VipsArithmetic;
typedef struct _VipsArithmeticClass {
VipsOperationClass parent_class;
/* For each input format, what output format. Used for arithmetic
* too, since we cast inputs to match.
*/
const VipsBandFormat *format_table;
/* A vector program for each input type.
*/
VipsVector *vectors[VIPS_FORMAT_LAST];
/* ... and if we've set a program for this format.
*/
gboolean vector_program[VIPS_FORMAT_LAST];
/* The buffer processor.
*/
VipsArithmeticProcessFn process_line;
} VipsArithmeticClass;
GType vips_arithmetic_get_type( void );
void vips_arithmetic_set_format_table( VipsArithmeticClass *klass,
const VipsBandFormat *format_table );
void vips_arithmetic_set_vector( VipsArithmeticClass *klass );
VipsVector *vips_arithmetic_get_vector( VipsArithmeticClass *klass,
VipsBandFormat fmt );
void vips_arithmetic_compile( VipsArithmeticClass *klass );
VipsVector *vips_arithmetic_get_program( VipsArithmeticClass *klass,
VipsBandFormat fmt );
#ifdef __cplusplus
}
#endif /*__cplusplus*/
#endif /*VIPS_PARITHMETIC_H*/
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