330 lines
8.6 KiB
C
330 lines
8.6 KiB
C
/* simple wrapper over vips_affine() to make scale / rotate easy from the
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* command-line
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*
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* 3/10/13
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* - from affine.c
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* 25/10/13
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* - oops, reverse rotation direction to match the convention used in the
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* rest of vips
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* 13/8/14
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* - oops, missing scale from b, thanks Topochicho
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* 7/2/16
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* - use vips_reduce(), if we can
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* 17/11/17
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* ` - add optional "background" param
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* ` - don't use vips_reduce() since it has no "background" param
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* 10/3/18
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* - add vips_rotate() class for convenience
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program 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
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; 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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/*
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#define DEBUG
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <glib/gi18n-lib.h>
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#include <math.h>
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#include <string.h>
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#include <vips/vips.h>
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#include "presample.h"
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typedef struct _VipsSimilarityBase {
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VipsResample parent_instance;
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double scale;
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double angle;
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VipsInterpolate *interpolate;
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VipsArrayDouble *background;
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double odx;
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double ody;
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double idx;
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double idy;
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} VipsSimilarityBase;
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typedef VipsResampleClass VipsSimilarityBaseClass;
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G_DEFINE_ABSTRACT_TYPE( VipsSimilarityBase, vips_similarity_base,
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VIPS_TYPE_RESAMPLE );
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static int
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vips_similarity_base_build( VipsObject *object )
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{
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VipsResample *resample = VIPS_RESAMPLE( object );
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VipsSimilarityBase *base = (VipsSimilarityBase *) object;
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VipsImage **t = (VipsImage **)
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vips_object_local_array( object, 4 );
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double a = base->scale * cos( VIPS_RAD( base->angle ) );
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double b = base->scale * -sin( VIPS_RAD( base->angle ) );
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double c = -b;
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double d = a;
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if( VIPS_OBJECT_CLASS( vips_similarity_base_parent_class )->
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build( object ) )
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return( -1 );
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if( vips_affine( resample->in, &t[0], a, b, c, d,
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"interpolate", base->interpolate,
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"odx", base->odx,
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"ody", base->ody,
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"idx", base->idx,
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"idy", base->idy,
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"background", base->background,
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NULL ) )
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return( -1 );
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if( vips_image_write( t[0], resample->out ) )
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return( -1 );
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return( 0 );
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}
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static void
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vips_similarity_base_class_init( VipsSimilarityBaseClass *class )
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS( class );
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VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
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gobject_class->set_property = vips_object_set_property;
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gobject_class->get_property = vips_object_get_property;
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vobject_class->nickname = "similarity_base";
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vobject_class->description = _( "base similarity transform" );
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vobject_class->build = vips_similarity_base_build;
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VIPS_ARG_INTERPOLATE( class, "interpolate", 5,
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_( "Interpolate" ),
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_( "Interpolate pixels with this" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsSimilarityBase, interpolate ) );
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VIPS_ARG_BOXED( class, "background", 6,
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_( "Background" ),
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_( "Background value" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsSimilarityBase, background ),
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VIPS_TYPE_ARRAY_DOUBLE );
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VIPS_ARG_DOUBLE( class, "odx", 112,
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_( "Output offset" ),
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_( "Horizontal output displacement" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsSimilarityBase, odx ),
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-10000000, 10000000, 0 );
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VIPS_ARG_DOUBLE( class, "ody", 113,
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_( "Output offset" ),
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_( "Vertical output displacement" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsSimilarityBase, ody ),
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-10000000, 10000000, 0 );
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VIPS_ARG_DOUBLE( class, "idx", 114,
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_( "Input offset" ),
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_( "Horizontal input displacement" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsSimilarityBase, idx ),
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-10000000, 10000000, 0 );
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VIPS_ARG_DOUBLE( class, "idy", 115,
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_( "Input offset" ),
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_( "Vertical input displacement" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsSimilarityBase, idy ),
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-10000000, 10000000, 0 );
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}
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static void
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vips_similarity_base_init( VipsSimilarityBase *base )
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{
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base->scale = 1;
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base->angle = 0;
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base->interpolate = NULL;
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base->odx = 0;
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base->ody = 0;
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base->idx = 0;
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base->idy = 0;
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base->background = vips_array_double_newv( 1, 0.0 );
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}
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typedef VipsSimilarityBase VipsSimilarity;
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typedef VipsSimilarityBaseClass VipsSimilarityClass;
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G_DEFINE_TYPE( VipsSimilarity, vips_similarity,
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vips_similarity_base_get_type() );
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static void
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vips_similarity_class_init( VipsSimilarityClass *class )
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS( class );
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VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
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gobject_class->set_property = vips_object_set_property;
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gobject_class->get_property = vips_object_get_property;
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vobject_class->nickname = "similarity";
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vobject_class->description = _( "similarity transform of an image" );
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VIPS_ARG_DOUBLE( class, "scale", 3,
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_( "Scale" ),
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_( "Scale by this factor" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsSimilarity, scale ),
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0, 10000000, 1 );
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VIPS_ARG_DOUBLE( class, "angle", 4,
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_( "Angle" ),
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_( "Rotate anticlockwise by this many degrees" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsSimilarity, angle ),
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-10000000, 10000000, 0 );
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}
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static void
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vips_similarity_init( VipsSimilarity *similarity )
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{
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}
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/**
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* vips_similarity: (method)
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* @in: input image
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* @out: (out): output image
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* @...: %NULL-terminated list of optional named arguments
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*
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* Optional arguments:
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*
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* * @scale: %gdouble, scale by this factor
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* * @angle: %gdouble, rotate by this many degrees clockwise
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* * @interpolate: #VipsInterpolate, interpolate pixels with this
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* * @background: #VipsArrayDouble colour for new pixels
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* * @idx: %gdouble, input horizontal offset
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* * @idy: %gdouble, input vertical offset
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* * @odx: %gdouble, output horizontal offset
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* * @ody: %gdouble, output vertical offset
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* * @ody: %gdouble, output vertical offset
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*
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* This operator calls vips_affine() for you, calculating the matrix for the
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* affine transform from @scale and @angle. Other parameters are passed on to
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* vips_affine() unaltered.
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*
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* See also: vips_affine(), #VipsInterpolate.
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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vips_similarity( VipsImage *in, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_call_split( "similarity", ap, in, out );
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va_end( ap );
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return( result );
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}
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typedef VipsSimilarityBase VipsRotate;
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typedef VipsSimilarityBaseClass VipsRotateClass;
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G_DEFINE_TYPE( VipsRotate, vips_rotate, vips_similarity_base_get_type() );
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static void
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vips_rotate_class_init( VipsRotateClass *class )
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS( class );
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VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
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gobject_class->set_property = vips_object_set_property;
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gobject_class->get_property = vips_object_get_property;
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vobject_class->nickname = "rotate";
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vobject_class->description =
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_( "rotate an image by a number of degrees" );
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VIPS_ARG_DOUBLE( class, "angle", 4,
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_( "Angle" ),
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_( "Rotate anticlockwise by this many degrees" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsSimilarity, angle ),
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-10000000, 10000000, 0 );
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}
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static void
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vips_rotate_init( VipsRotate *rotate )
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{
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}
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/**
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* vips_rotate: (method)
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* @in: input image
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* @out: (out): output image
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* @angle: %gdouble, rotate by this many degrees clockwise
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* @...: %NULL-terminated list of optional named arguments
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*
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* Optional arguments:
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*
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* * @interpolate: #VipsInterpolate, interpolate pixels with this
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* * @background: #VipsArrayDouble colour for new pixels
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* * @idx: %gdouble, input horizontal offset
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* * @idy: %gdouble, input vertical offset
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* * @odx: %gdouble, output horizontal offset
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* * @ody: %gdouble, output vertical offset
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* * @ody: %gdouble, output vertical offset
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*
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* This operator calls vips_affine() for you, calculating the matrix for the
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* affine transform from @scale and @angle. Other parameters are passed on to
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* vips_affine() unaltered.
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*
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* See also: vips_affine(), #VipsInterpolate.
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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vips_rotate( VipsImage *in, VipsImage **out, double angle, ... )
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{
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va_list ap;
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int result;
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va_start( ap, angle );
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result = vips_call_split( "rotate", ap, in, out, angle );
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va_end( ap );
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return( result );
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}
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