256 lines
6.9 KiB
C
256 lines
6.9 KiB
C
/* base class for all conversion operations
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*
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* properties:
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* - unary, binary or binary with one arg a constant
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* - cast binary args to match
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* - not point-to-point
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* - format, bands etc. can all change
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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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/*
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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 <vips/intl.h>
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#include <stdio.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 <vips/internal.h>
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#include "conversion.h"
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G_DEFINE_ABSTRACT_TYPE( VipsConversion, vips_conversion, VIPS_TYPE_OPERATION );
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static int
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vips_conversion_build( VipsObject *object )
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{
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VipsConversion *conversion = VIPS_CONVERSION( object );
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#ifdef DEBUG
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printf( "vips_conversion_build: " );
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vips_object_print_name( object );
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printf( "\n" );
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#endif /*DEBUG*/
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g_object_set( conversion, "out", vips_image_new(), NULL );
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if( VIPS_OBJECT_CLASS( vips_conversion_parent_class )->build( object ) )
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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_conversion_class_init( VipsConversionClass *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 = "conversion";
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vobject_class->description = _( "conversion operations" );
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vobject_class->build = vips_conversion_build;
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VIPS_ARG_IMAGE( class, "out", 1,
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_( "Output" ),
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_( "Output image" ),
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VIPS_ARGUMENT_REQUIRED_OUTPUT,
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G_STRUCT_OFFSET( VipsConversion, out ) );
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}
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static void
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vips_conversion_init( VipsConversion *conversion )
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{
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}
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/* Called from iofuncs to init all operations in this dir. Use a plugin system
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* instead?
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*/
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void
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vips_conversion_operation_init( void )
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{
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extern GType vips_copy_get_type( void );
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extern GType vips_tile_cache_get_type( void );
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extern GType vips_line_cache_get_type( void );
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extern GType vips_sequential_get_type( void );
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extern GType vips_cache_get_type( void );
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extern GType vips_embed_get_type( void );
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extern GType vips_flip_get_type( void );
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extern GType vips_insert_get_type( void );
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extern GType vips_join_get_type( void );
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extern GType vips_extract_area_get_type( void );
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extern GType vips_extract_band_get_type( void );
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extern GType vips_replicate_get_type( void );
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extern GType vips_cast_get_type( void );
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extern GType vips_bandjoin_get_type( void );
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extern GType vips_black_get_type( void );
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extern GType vips_rot_get_type( void );
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extern GType vips_ifthenelse_get_type( void );
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extern GType vips_recomb_get_type( void );
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extern GType vips_bandmean_get_type( void );
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extern GType vips_flatten_get_type( void );
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extern GType vips_bandbool_get_type( void );
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extern GType vips_gaussnoise_get_type( void );
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extern GType vips_grid_get_type( void );
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extern GType vips_scale_get_type( void );
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extern GType vips_wrap_get_type( void );
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vips_copy_get_type();
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vips_tile_cache_get_type();
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vips_line_cache_get_type();
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vips_sequential_get_type();
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vips_cache_get_type();
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vips_embed_get_type();
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vips_flip_get_type();
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vips_insert_get_type();
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vips_join_get_type();
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vips_extract_area_get_type();
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vips_extract_band_get_type();
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vips_replicate_get_type();
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vips_cast_get_type();
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vips_bandjoin_get_type();
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vips_black_get_type();
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vips_rot_get_type();
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vips_ifthenelse_get_type();
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vips_recomb_get_type();
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vips_bandmean_get_type();
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vips_flatten_get_type();
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vips_bandbool_get_type();
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vips_gaussnoise_get_type();
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vips_grid_get_type();
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vips_scale_get_type();
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vips_wrap_get_type();
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}
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/* The common part of most binary conversion
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* operators. We:
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*
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* - check in and out
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* - cast in1 and in2 up to a common format
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* - equalise bands
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* - make an input array
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* - return the matched images in vec[0] and vec[1]
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*
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* A left-over, remove soon.
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*/
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IMAGE **
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im__insert_base( const char *domain,
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IMAGE *in1, IMAGE *in2, IMAGE *out )
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{
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IMAGE *t[4];
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IMAGE **vec;
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if( im_piocheck( in1, out ) ||
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im_pincheck( in2 ) ||
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im_check_bands_1orn( domain, in1, in2 ) ||
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im_check_coding_known( domain, in1 ) ||
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im_check_coding_same( domain, in1, in2 ) )
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return( NULL );
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/* Cast our input images up to a common format and bands.
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*/
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if( im_open_local_array( out, t, 4, domain, "p" ) ||
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im__formatalike( in1, in2, t[0], t[1] ) ||
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im__bandalike( domain, t[0], t[1], t[2], t[3] ) ||
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!(vec = im_allocate_input_array( out, t[2], t[3], NULL )) )
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return( NULL );
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/* Generate the output.
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*/
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if( im_cp_descv( out, vec[0], vec[1], NULL ) ||
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im_demand_hint_array( out, IM_SMALLTILE, vec ) )
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return( NULL );
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return( vec );
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}
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/**
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* im_insertset:
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* @main: big image
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* @sub: small image
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* @out: output image
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* @n: number of positions
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* @x: left positions of @sub
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* @y: top positions of @sub
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*
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* Insert @sub repeatedly into @main at the positions listed in the arrays @x,
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* @y of length @n. @out is the same
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* size as @main. @sub is clipped against the edges of @main.
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*
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* This operation is fast for large @n, but will use a memory buffer the size
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* of @out. It's useful for things like making scatter plots.
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*
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* If the number of bands differs, one of the images
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* must have one band. In this case, an n-band image is formed from the
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* one-band image by joining n copies of the one-band image together, and then
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* the two n-band images are operated upon.
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*
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* The two input images are cast up to the smallest common type (see table
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* Smallest common format in
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* <link linkend="VIPS-arithmetic">arithmetic</link>).
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*
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* See also: im_insert(), im_lrjoin().
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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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im_insertset( IMAGE *main, IMAGE *sub, IMAGE *out, int n, int *x, int *y )
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{
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IMAGE **vec;
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IMAGE *t;
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int i;
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if( !(vec = im__insert_base( "im_insert", main, sub, out )) )
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return( -1 );
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/* Copy to a memory image, zap that, then copy to out.
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*/
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if( !(t = im_open_local( out, "im_insertset", "t" )) ||
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im_copy( vec[0], t ) )
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return( -1 );
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for( i = 0; i < n; i++ )
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if( im_insertplace( t, vec[1], x[i], y[i] ) )
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return( -1 );
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if( im_copy( t, out ) )
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return( -1 );
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return( 0 );
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}
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