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/* base class for point-wise creators
*
* 13/6/13
*/
/*
This file is part of VIPS.
VIPS 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
*/
/*
#define VIPS_DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <glib/gi18n-lib.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <vips/vips.h>
#include "pcreate.h"
#include "point.h"
G_DEFINE_ABSTRACT_TYPE( VipsPoint, vips_point, VIPS_TYPE_CREATE );
static int
vips_point_gen( VipsRegion *or, void *seq, void *a, void *b,
gboolean *stop )
{
VipsPoint *point = (VipsPoint *) a;
VipsPointClass *class = VIPS_POINT_GET_CLASS( point );
VipsRect *r = &or->valid;
int x, y;
for( y = 0; y < r->height; y++ ) {
int ay = r->top + y;
float *q = (float *) VIPS_REGION_ADDR( or, r->left, ay );
for( x = 0; x < r->width; x++ )
q[x] = class->point( point, r->left + x, ay );
}
return( 0 );
}
static int
vips_point_build( VipsObject *object )
{
VipsCreate *create = VIPS_CREATE( object );
VipsPoint *point = VIPS_POINT( object );
VipsPointClass *class = VIPS_POINT_GET_CLASS( point );
VipsImage **t = (VipsImage **) vips_object_local_array( object, 4 );
VipsImage *in;
if( VIPS_OBJECT_CLASS( vips_point_parent_class )->build( object ) )
return( -1 );
t[0] = vips_image_new();
vips_image_init_fields( t[0],
point->width, point->height, 1,
VIPS_FORMAT_FLOAT, VIPS_CODING_NONE, class->interpretation,
1.0, 1.0 );
if( vips_image_pipelinev( t[0], VIPS_DEMAND_STYLE_ANY, NULL ) ||
vips_image_generate( t[0],
NULL, vips_point_gen, NULL, point, NULL ) )
return( -1 );
in = t[0];
if( point->uchar ) {
float min = class->min;
float max = class->max;
float range = max - min;
if( vips_linear1( in, &t[2],
255.0 / range, -min * 255.0 / range,
"uchar", TRUE,
NULL ) )
return( -1 );
in = t[2];
/* We don't want FOURIER or whatever in this case.
*/
in->Type = VIPS_INTERPRETATION_MULTIBAND;
}
if( vips_image_write( in, create->out ) )
return( -1 );
return( 0 );
}
static void
vips_point_class_init( VipsPointClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
vobject_class->nickname = "point";
vobject_class->description = _( "make a point image" );
vobject_class->build = vips_point_build;
class->point = NULL;
class->min = -1.0;
class->max = 1.0;
class->interpretation = VIPS_INTERPRETATION_MULTIBAND;
VIPS_ARG_INT( class, "width", 2,
_( "Width" ),
_( "Image width in pixels" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsPoint, width ),
1, VIPS_MAX_COORD, 1 );
VIPS_ARG_INT( class, "height", 3,
_( "Height" ),
_( "Image height in pixels" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsPoint, height ),
1, VIPS_MAX_COORD, 1 );
VIPS_ARG_BOOL( class, "uchar", 4,
_( "Uchar" ),
_( "Output an unsigned char image" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsPoint, uchar ),
FALSE );
}
static void
vips_point_init( VipsPoint *point )
{
}
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