125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
/* base class for all arithmetic operations
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*/
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/*
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Copyright (C) 1991-2005 The National Gallery
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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#ifndef VIPS_PARITHMETIC_H
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#define VIPS_PARITHMETIC_H
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#ifdef __cplusplus
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extern "C" {
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#endif /*__cplusplus*/
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#include <vips/vips.h>
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#include <vips/vector.h>
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#define VIPS_TYPE_ARITHMETIC (vips_arithmetic_get_type())
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#define VIPS_ARITHMETIC( obj ) \
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(G_TYPE_CHECK_INSTANCE_CAST( (obj), \
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VIPS_TYPE_ARITHMETIC, VipsArithmetic ))
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#define VIPS_ARITHMETIC_CLASS( klass ) \
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(G_TYPE_CHECK_CLASS_CAST( (klass), \
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VIPS_TYPE_ARITHMETIC, VipsArithmeticClass))
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#define VIPS_IS_ARITHMETIC( obj ) \
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(G_TYPE_CHECK_INSTANCE_TYPE( (obj), VIPS_TYPE_ARITHMETIC ))
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#define VIPS_IS_ARITHMETIC_CLASS( klass ) \
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(G_TYPE_CHECK_CLASS_TYPE( (klass), VIPS_TYPE_ARITHMETIC ))
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#define VIPS_ARITHMETIC_GET_CLASS( obj ) \
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(G_TYPE_INSTANCE_GET_CLASS( (obj), \
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VIPS_TYPE_ARITHMETIC, VipsArithmeticClass ))
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struct _VipsArithmetic;
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typedef void (*VipsArithmeticProcessFn)( struct _VipsArithmetic *arithmetic,
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VipsPel *out, VipsPel **in, int width );
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typedef struct _VipsArithmetic {
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VipsOperation parent_instance;
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/* All have an output image.
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*/
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VipsImage *out;
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/* Array of input arguments, set these from a subclass.
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*/
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VipsImage **in;
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int n;
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/* The minimum number of output bands. For example, VipsLinear with a
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* three element constant must make at least a three-band output.
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*/
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int base_bands;
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/* The input images, ready for the operation.
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*/
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VipsImage **ready;
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/* Set this to override class->format_table.
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*/
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VipsBandFormat format;
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} VipsArithmetic;
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typedef struct _VipsArithmeticClass {
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VipsOperationClass parent_class;
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/* For each input format, what output format. Used for arithmetic
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* too, since we cast inputs to match.
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*/
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const VipsBandFormat *format_table;
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/* A vector program for each input type.
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*/
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VipsVector *vectors[VIPS_FORMAT_LAST];
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/* ... and if we've set a program for this format.
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*/
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gboolean vector_program[VIPS_FORMAT_LAST];
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/* The buffer processor.
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*/
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VipsArithmeticProcessFn process_line;
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} VipsArithmeticClass;
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GType vips_arithmetic_get_type( void );
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void vips_arithmetic_set_format_table( VipsArithmeticClass *klass,
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const VipsBandFormat *format_table );
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void vips_arithmetic_set_vector( VipsArithmeticClass *klass );
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VipsVector *vips_arithmetic_get_vector( VipsArithmeticClass *klass,
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VipsBandFormat fmt );
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void vips_arithmetic_compile( VipsArithmeticClass *klass );
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VipsVector *vips_arithmetic_get_program( VipsArithmeticClass *klass,
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VipsBandFormat fmt );
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#ifdef __cplusplus
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}
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#endif /*__cplusplus*/
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#endif /*VIPS_PARITHMETIC_H*/
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