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redo im_LCh2Lab() as a class

This commit is contained in:
John Cupitt 2012-09-19 12:01:02 +01:00
parent 05d3e3e167
commit 8abbcc4e77
9 changed files with 171 additions and 130 deletions
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2
ChangeLog
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@ -1,5 +1,5 @@
31/8/12 started 7.31.0
- redone im_Lab2XYZ(), im_Lab2LCh() as classes
- redone im_Lab2XYZ(), im_Lab2LCh(), im_LCh2Lab() as classes
13/9/12 started 7.30.3
- linecache sized itself too large

146
libvips/colour/LCh2Lab.c Normal file
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@ -0,0 +1,146 @@
/* im_LCh2Lab
*
* 15/11/94 JC
* - error messages added
* - memory leak fixed
* 16/11/94 JC
* - uses im_wrap_oneonebuf() now
* 8/2/95 JC
* - im_wrap v2
* 2/11/09
* - gtkdoc
* 19/9/12
* - redone as a class
*/
/*
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <stdio.h>
#include <math.h>
#include <vips/vips.h>
#include "colour.h"
typedef VipsColorimetric VipsLCh2Lab;
typedef VipsColorimetricClass VipsLCh2LabClass;
G_DEFINE_TYPE( VipsLCh2Lab, vips_LCh2Lab, VIPS_TYPE_COLORIMETRIC );
/* Process a buffer of data.
*/
static void
vips_LCh2Lab_line( VipsColour *colour, VipsPel *out, VipsPel **in, int width )
{
float *p = (float *) in[0];
float *q = (float *) out;
int x;
for( x = 0; x < width; x++ ) {
float L = p[0];
float C = p[1];
float h = p[2];
float a, b;
p += 3;
a = C * cos( VIPS_RAD( h ) );
b = C * sin( VIPS_RAD( h ) );
q[0] = L;
q[1] = a;
q[2] = b;
q += 3;
}
}
/**
* vips_col_Ch2ab:
* @C: Chroma
* @h: Hue angle (degrees)
* @a: return CIE a* value
* @b: return CIE b* value
*
* Calculate ab from Ch, h in degrees.
*/
void
vips_col_Ch2ab( float C, float h, float *a, float *b )
{
float in[3], out[3];
in[1] = C;
in[2] = h;
vips_LCh2Lab_line( NULL, (VipsPel *) out, (VipsPel **) &in, 1 );
*a = out[1];
*b = out[2];
}
static void
vips_LCh2Lab_class_init( VipsLCh2LabClass *class )
{
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsColourClass *colour_class = VIPS_COLOUR_CLASS( class );
object_class->nickname = "LCh2Lab";
object_class->description = _( "transform LCh to Lab" );
colour_class->process_line = vips_LCh2Lab_line;
colour_class->interpretation = VIPS_INTERPRETATION_LAB;
}
static void
vips_LCh2Lab_init( VipsLCh2Lab *LCh2Lab )
{
}
/**
* vips_LCh2Lab:
* @in: input image
* @out: output image
*
* Turn LCh to Lab.
*
* Returns: 0 on success, -1 on error
*/
int
vips_LCh2Lab( VipsImage *in, VipsImage **out, ... )
{
va_list ap;
int result;
va_start( ap, out );
result = vips_call_split( "LCh2Lab", ap, in, out );
va_end( ap );
return( result );
}

2
libvips/colour/Makefile.am
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@ -9,7 +9,7 @@ libcolour_la_SOURCES = \
Lab2XYZ.c \
Lab2LCh.c \
im_icc_transform.c \
im_LCh2Lab.c \
LCh2Lab.c \
im_LCh2UCS.c \
im_Lab2LabQ.c \
im_Lab2LabS.c \

6
libvips/colour/colour.c
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@ -116,7 +116,7 @@ vips_colour_build( VipsObject *object )
return( -1 );
vips_demand_hint_array( colour->out,
VIPS_DEMAND_STYLE_THINSTRIP, colour->in );
out->Type = class->interpretation;
colour->out->Type = class->interpretation;
if( vips_image_generate( colour->out,
vips_start_many, vips_colour_gen, vips_stop_many,
@ -221,7 +221,7 @@ vips_colorimetric_class_init( VipsColorimetricClass *class )
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
vobject_class->nickname = "colour";
vobject_class->nickname = "colorimetric";
vobject_class->description = _( "colorimetric operations" );
vobject_class->build = vips_colorimetric_build;
@ -245,7 +245,9 @@ vips_colour_operation_init( void )
{
extern GType vips_Lab2XYZ_get_type( void );
extern GType vips_Lab2LCh_get_type( void );
extern GType vips_LCh2Lab_get_type( void );
vips_Lab2XYZ_get_type();
vips_Lab2LCh_get_type();
vips_LCh2Lab_get_type();
}

34
libvips/colour/colour_funcs.c
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@ -77,27 +77,6 @@ static float LI[ 1001 ];
static float CI[ 3001 ];
static float hI[ 101 ][ 361 ];
/**
* im_col_Ch2ab:
* @C: Chroma
* @h: Hue angle (degrees)
* @a: return CIE a* value
* @b: return CIE b* value
*
* Calculate ab from Ch, h in degrees.
*/
void
im_col_Ch2ab( float C, float h, float *a, float *b )
{
float in[3], out[3];
in[1] = C;
in[2] = h;
imb_LCh2Lab( in, out, 1 );
*a = out[1];
*b = out[2];
}
/**
* im_col_XYZ2Lab:
* @X: Input CIE XYZ colour
@ -767,19 +746,6 @@ vips_Lab2LabQ( VipsImage *in, VipsImage **out, ... )
return( result );
}
int
vips_LCh2Lab( VipsImage *in, VipsImage **out, ... )
{
va_list ap;
int result;
va_start( ap, out );
result = vips_call_split( "im_LCh2Lab", ap, in, out );
va_end( ap );
return( result );
}
int
vips_Yxy2Lab( VipsImage *in, VipsImage **out, ... )
{

90
libvips/colour/im_LCh2Lab.c
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@ -1,90 +0,0 @@
/* im_LCh2Lab
*
* 15/11/94 JC
* - error messages added
* - memory leak fixed
* 16/11/94 JC
* - uses im_wrap_oneonebuf() now
* 8/2/95 JC
* - im_wrap v2
* 2/11/09
* - gtkdoc
*/
/*
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <stdio.h>
#include <math.h>
#include <vips/vips.h>
#include <vips/internal.h>
/* Process a buffer of data.
*/
void
imb_LCh2Lab( float *p, float *q, int n )
{
int x;
for( x = 0; x < n; x++ ) {
float L = p[0];
float C = p[1];
float h = p[2];
float a, b;
p += 3;
a = C * cos( IM_RAD( h ) );
b = C * sin( IM_RAD( h ) );
q[0] = L;
q[1] = a;
q[2] = b;
q += 3;
}
}
/**
* im_LCh2Lab:
* @in: input image
* @out: output image
*
* Turn LCh to Lab.
*
* Returns: 0 on success, -1 on error.
*/
int
im_LCh2Lab( IMAGE *in, IMAGE *out )
{
return( im__colour_unary( "im_LCh2Lab", in, out, IM_TYPE_LAB,
(im_wrapone_fn) imb_LCh2Lab, NULL, NULL ) );
}

16
libvips/deprecated/vips7compat.c
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@ -2201,3 +2201,19 @@ im_Lab2LCh( IMAGE *in, IMAGE *out )
return( 0 );
}
int
im_LCh2Lab( IMAGE *in, IMAGE *out )
{
VipsImage *x;
if( vips_LCh2Lab( in, &x, NULL ) )
return( -1 );
if( im_copy( x, out ) ) {
g_object_unref( x );
return( -1 );
}
g_object_unref( x );
return( 0 );
}

3
libvips/include/vips/colour.h
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@ -125,6 +125,7 @@ void vips_col_Lab2XYZ( float L, float a, float b,
float *X, float *Y, float *Z );
double vips_col_ab2h( double a, double b );
void vips_col_ab2Ch( float a, float b, float *C, float *h );
void vips_col_Ch2ab( float C, float h, float *a, float *b );
@ -133,7 +134,6 @@ void vips_col_ab2Ch( float a, float b, float *C, float *h );
/* Colour loading and conversion functions.
*/
void im_col_ab2Ch( float a, float b, float *C, float *h );
void im_col_Ch2ab( float C, float h, float *a, float *b );
void im_col_XYZ2Lab( float X, float Y, float Z, float *L, float *a, float *b );
float im_col_pythagoras( float L1, float a1, float b1,
float L2, float a2, float b2 );
@ -152,7 +152,6 @@ float im_col_dECMC(
float im_col_dE00(
float L1, float a1, float b1, float L2, float a2, float b2 );
int im_LCh2Lab( VipsImage *in, VipsImage *out );
int im_LabQ2XYZ( VipsImage *in, VipsImage *out );
int im_rad2float( VipsImage *in, VipsImage *out );
int im_float2rad( VipsImage *in, VipsImage *out );

2
libvips/include/vips/vips7compat.h
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@ -83,6 +83,7 @@ extern "C" {
#define im_col_Lab2XYZ vips_col_Lab2XYZ
#define im_col_ab2h vips_col_ab2h
#define im_col_ab2Ch vips_col_ab2Ch
#define im_col_Ch2ab vips_col_Ch2ab
#define PEL VipsPel
@ -699,6 +700,7 @@ int im_shrink( VipsImage *in, VipsImage *out, double xshrink, double yshrink );
int im_Lab2XYZ_temp( IMAGE *in, IMAGE *out, double X0, double Y0, double Z0 );
int im_Lab2XYZ( IMAGE *in, IMAGE *out );
int im_Lab2LCh( VipsImage *in, VipsImage *out );
int im_LCh2Lab( VipsImage *in, VipsImage *out );
/* ruby-vips uses this
*/