168 lines
3.9 KiB
C
168 lines
3.9 KiB
C
/* base class for point-wise creators
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*
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* 13/6/13
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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 VIPS_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 <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <math.h>
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#include <vips/vips.h>
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#include "pcreate.h"
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#include "point.h"
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G_DEFINE_ABSTRACT_TYPE( VipsPoint, vips_point, VIPS_TYPE_CREATE );
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static int
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vips_point_gen( VipsRegion *or, void *seq, void *a, void *b,
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gboolean *stop )
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{
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VipsPoint *point = (VipsPoint *) a;
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VipsPointClass *class = VIPS_POINT_GET_CLASS( point );
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VipsRect *r = &or->valid;
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int x, y;
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for( y = 0; y < r->height; y++ ) {
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int ay = r->top + y;
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float *q = (float *) VIPS_REGION_ADDR( or, r->left, ay );
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for( x = 0; x < r->width; x++ )
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q[x] = class->point( point, r->left + x, ay );
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}
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return( 0 );
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}
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static int
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vips_point_build( VipsObject *object )
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{
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VipsCreate *create = VIPS_CREATE( object );
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VipsPoint *point = VIPS_POINT( object );
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VipsPointClass *class = VIPS_POINT_GET_CLASS( point );
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VipsImage **t = (VipsImage **) vips_object_local_array( object, 4 );
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VipsImage *in;
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if( VIPS_OBJECT_CLASS( vips_point_parent_class )->build( object ) )
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return( -1 );
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t[0] = vips_image_new();
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vips_image_init_fields( t[0],
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point->width, point->height, 1,
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VIPS_FORMAT_FLOAT, VIPS_CODING_NONE, class->interpretation,
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1.0, 1.0 );
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if( vips_image_pipelinev( t[0], VIPS_DEMAND_STYLE_ANY, NULL ) ||
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vips_image_generate( t[0],
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NULL, vips_point_gen, NULL, point, NULL ) )
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return( -1 );
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in = t[0];
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if( point->uchar ) {
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float min = class->min;
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float max = class->max;
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float range = max - min;
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if( vips_linear1( in, &t[2],
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255.0 / range, -min * 255.0 / range,
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"uchar", TRUE,
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NULL ) )
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return( -1 );
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in = t[2];
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/* We don't want FOURIER or whatever in this case.
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*/
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in->Type = VIPS_INTERPRETATION_MULTIBAND;
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}
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if( vips_image_write( in, create->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_point_class_init( VipsPointClass *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 = "point";
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vobject_class->description = _( "make a point image" );
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vobject_class->build = vips_point_build;
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class->point = NULL;
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class->min = -1.0;
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class->max = 1.0;
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class->interpretation = VIPS_INTERPRETATION_MULTIBAND;
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VIPS_ARG_INT( class, "width", 2,
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_( "Width" ),
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_( "Image width in pixels" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsPoint, width ),
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1, VIPS_MAX_COORD, 1 );
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VIPS_ARG_INT( class, "height", 3,
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_( "Height" ),
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_( "Image height in pixels" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsPoint, height ),
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1, VIPS_MAX_COORD, 1 );
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VIPS_ARG_BOOL( class, "uchar", 4,
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_( "Uchar" ),
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_( "Output an unsigned char image" ),
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VIPS_ARGUMENT_OPTIONAL_INPUT,
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G_STRUCT_OFFSET( VipsPoint, uchar ),
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FALSE );
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}
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static void
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vips_point_init( VipsPoint *point )
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{
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}
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