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rename colour_convert as colourspace

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also rework im_icc_ac2rc
This commit is contained in:
John Cupitt 2012-11-01 14:59:20 +00:00
parent 8e72d25c9a
commit 4c5dd969bc
10 changed files with 340 additions and 288 deletions
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2
ChangeLog
View File

@ -6,7 +6,7 @@
im_icc_import*(), im_icc_export*(), im_icc_transform*(), im_dE_fromLab(),
im_dECMC_fromLab(), im_dE00_from_Lab()
as classes
- added vips_colour_convert(), replaces all derived conversions
- added vips_colourspace(), replaces all derived conversions
- faster and more accurate sRGB <-> XYZ conversion
- rename UCS colourspace as CMC
- dzsave can write zoomify and google maps layout as well

8
TODO
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@ -1,13 +1,9 @@
- add something to dzsave to control pyramid depth ... can then use it for
straight tiling
- add mono as a colourspace? also rad?
- add mono as a colourspace? also rad? unpack to RGB with rad2float
move colour_convert into a separate file
- im_icc_ac2rc needs doing once we have a general 'convert' operator
- test new icc stuff with lcms1 and lcms2
grey16 too? rgb16?
- should we have a better thing to stop convert_saveable running for vips
images?

1
libvips/colour/Makefile.am
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@ -2,6 +2,7 @@ noinst_LTLIBRARIES = libcolour.la
libcolour_la_SOURCES = \
colour.c \
colourspace.c \
colour_dispatch.c \
dE76.c \
dE00.c \

247
libvips/colour/colour.c
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@ -494,12 +494,10 @@ vips_colour_difference_build( VipsObject *object )
right, 3 ) )
return( -1 );
if( vips_colour_convert( left, &t[6],
difference->interpretation, NULL ) )
if( vips_colourspace( left, &t[6], difference->interpretation, NULL ) )
return( -1 );
left = t[6];
if( vips_colour_convert( right, &t[7],
difference->interpretation, NULL ) )
if( vips_colourspace( right, &t[7], difference->interpretation, NULL ) )
return( -1 );
right = t[7];
@ -585,250 +583,13 @@ vips_colour_difference_init( VipsColourDifference *difference )
colour->bands = 1;
}
/* A colour-transforming function.
*/
typedef int (*VipsColourTransformFn)( VipsImage *in, VipsImage **out, ... );
/* Maximum number of steps we allow in a route. 10 steps should be enough
* for anyone.
*/
#define MAX_STEPS (10)
/* A route between two colour spaces.
*
* 10 steps should be enough for anyone.
*/
typedef struct _VipsColourRoute {
VipsInterpretation from;
VipsInterpretation to;
VipsColourTransformFn route[MAX_STEPS + 1];
} VipsColourRoute;
/* Some defines to save typing. These are the colour spaces we support
* conversions between.
*/
#define XYZ VIPS_INTERPRETATION_XYZ
#define LAB VIPS_INTERPRETATION_LAB
#define LABQ VIPS_INTERPRETATION_LABQ
#define LCH VIPS_INTERPRETATION_LCH
#define CMC VIPS_INTERPRETATION_CMC
#define LABS VIPS_INTERPRETATION_LABS
#define sRGB VIPS_INTERPRETATION_sRGB
#define YXY VIPS_INTERPRETATION_YXY
/* All the routes we know about.
*/
static VipsColourRoute vips_colour_routes[] = {
{ XYZ, LAB, { vips_XYZ2Lab, NULL } },
{ XYZ, LABQ, { vips_XYZ2Lab, vips_Lab2LabQ, NULL } },
{ XYZ, LCH, { vips_XYZ2Lab, vips_Lab2LCh, NULL } },
{ XYZ, CMC, { vips_XYZ2Lab, vips_Lab2LCh, vips_LCh2CMC, NULL } },
{ XYZ, LABS, { vips_XYZ2Lab, vips_Lab2LabS, NULL } },
{ XYZ, sRGB, { vips_XYZ2sRGB, NULL } },
{ XYZ, YXY, { vips_XYZ2Yxy, NULL } },
{ LAB, XYZ, { vips_Lab2XYZ, NULL } },
{ LAB, LABQ, { vips_Lab2LabQ, NULL } },
{ LAB, LCH, { vips_Lab2LCh, NULL } },
{ LAB, CMC, { vips_Lab2LCh, vips_LCh2CMC, NULL } },
{ LAB, LABS, { vips_Lab2LabS, NULL } },
{ LAB, sRGB, { vips_Lab2XYZ, vips_XYZ2sRGB, NULL } },
{ LAB, YXY, { vips_Lab2XYZ, vips_XYZ2Yxy, NULL } },
{ LABQ, XYZ, { vips_LabQ2Lab, vips_Lab2XYZ, NULL } },
{ LABQ, LAB, { vips_LabQ2Lab, NULL } },
{ LABQ, LCH, { vips_LabQ2Lab, vips_Lab2LCh, NULL } },
{ LABQ, CMC, { vips_LabQ2Lab, vips_Lab2LCh, vips_LCh2CMC, NULL } },
{ LABQ, LABS, { vips_LabQ2LabS, NULL } },
{ LABQ, sRGB, { vips_LabQ2sRGB, NULL } },
{ LABQ, YXY, { vips_LabQ2Lab, vips_Lab2XYZ, vips_XYZ2Yxy, NULL } },
{ LCH, XYZ, { vips_LCh2Lab, vips_Lab2XYZ, NULL } },
{ LCH, LAB, { vips_LCh2Lab, NULL } },
{ LCH, LABQ, { vips_LCh2Lab, vips_Lab2LabQ, NULL } },
{ LCH, CMC, { vips_LCh2CMC, NULL } },
{ LCH, LABS, { vips_LCh2Lab, vips_Lab2LabS, NULL } },
{ LCH, sRGB, { vips_LCh2Lab, vips_Lab2XYZ, vips_XYZ2sRGB, NULL } },
{ LCH, YXY, { vips_LCh2Lab, vips_Lab2XYZ, vips_XYZ2Yxy, NULL } },
{ CMC, XYZ, { vips_CMC2LCh, vips_LCh2Lab, vips_Lab2XYZ, NULL } },
{ CMC, LAB, { vips_CMC2LCh, vips_LCh2Lab, NULL } },
{ CMC, LABQ, { vips_CMC2LCh, vips_LCh2Lab, vips_Lab2LabQ, NULL } },
{ CMC, LCH, { vips_CMC2LCh, NULL } },
{ CMC, LABS, { vips_CMC2LCh, vips_LCh2Lab, vips_Lab2LabS, NULL } },
{ CMC, sRGB, { vips_CMC2LCh, vips_LCh2Lab, vips_Lab2XYZ,
vips_XYZ2sRGB, NULL } },
{ CMC, YXY, { vips_CMC2LCh, vips_LCh2Lab, vips_Lab2XYZ,
vips_XYZ2Yxy, NULL } },
{ LABS, XYZ, { vips_LabS2Lab, vips_Lab2XYZ, NULL } },
{ LABS, LAB, { vips_LabS2Lab, NULL } },
{ LABS, LABQ, { vips_LabS2LabQ, NULL } },
{ LABS, LCH, { vips_LabS2Lab, vips_Lab2LCh, NULL } },
{ LABS, CMC, { vips_LabS2Lab, vips_Lab2LCh, vips_LCh2CMC, NULL } },
{ LABS, sRGB, { vips_LabS2Lab, vips_Lab2XYZ, vips_XYZ2sRGB, NULL } },
{ LABS, YXY, { vips_LabS2Lab, vips_Lab2XYZ, vips_XYZ2Yxy, NULL } },
{ sRGB, XYZ, { vips_sRGB2XYZ, NULL } },
{ sRGB, LAB, { vips_sRGB2XYZ, vips_XYZ2Lab, NULL } },
{ sRGB, LABQ, { vips_sRGB2XYZ, vips_XYZ2Lab, vips_Lab2LabQ, NULL } },
{ sRGB, LCH, { vips_sRGB2XYZ, vips_XYZ2Lab, vips_Lab2LCh, NULL } },
{ sRGB, CMC, { vips_sRGB2XYZ, vips_XYZ2Lab, vips_Lab2LCh,
vips_LCh2CMC, NULL } },
{ sRGB, LABS, { vips_sRGB2XYZ, vips_XYZ2Lab, vips_Lab2LabS, NULL } },
{ sRGB, YXY, { vips_sRGB2XYZ, vips_XYZ2Yxy, NULL } },
{ YXY, XYZ, { vips_Yxy2XYZ, NULL } },
{ YXY, LAB, { vips_Yxy2XYZ, vips_XYZ2Lab, NULL } },
{ YXY, LABQ, { vips_Yxy2XYZ, vips_XYZ2Lab, vips_Lab2LabQ, NULL } },
{ YXY, LCH, { vips_Yxy2XYZ, vips_XYZ2Lab, vips_Lab2LCh, NULL } },
{ YXY, CMC, { vips_Yxy2XYZ, vips_XYZ2Lab, vips_Lab2LCh,
vips_LCh2CMC, NULL } },
{ YXY, LABS, { vips_Yxy2XYZ, vips_XYZ2Lab, vips_Lab2LabS, NULL } },
{ YXY, sRGB, { vips_Yxy2XYZ, vips_XYZ2sRGB, NULL } },
};
typedef struct _VipsColourConvert {
VipsOperation parent_instance;
VipsImage *in;
VipsImage *out;
VipsInterpretation space;
} VipsColourConvert;
typedef VipsOperationClass VipsColourConvertClass;
G_DEFINE_TYPE( VipsColourConvert, vips_colour_convert, VIPS_TYPE_OPERATION );
static int
vips_colour_convert_build( VipsObject *object )
{
VipsColourConvert *convert = (VipsColourConvert *) object;
int i, j;
VipsImage *x;
VipsImage **t;
VipsInterpretation interpretation;
t = (VipsImage **) vips_object_local_array( object, MAX_STEPS );
/* Verify that all input args have been set.
*/
if( VIPS_OBJECT_CLASS( vips_colour_convert_parent_class )->
build( object ) )
return( -1 );
interpretation = vips_image_guess_interpretation( convert->in );
/* No conversion necessary.
*/
if( interpretation == convert->space ) {
g_object_set( convert, "out", vips_image_new(), NULL );
return( vips_image_write( convert->in, convert->out ) );
}
x = convert->in;
for( i = 0; i < VIPS_NUMBER( vips_colour_routes ); i++ )
if( vips_colour_routes[i].from == interpretation &&
vips_colour_routes[i].to == convert->space )
break;
if( i == VIPS_NUMBER( vips_colour_routes ) ) {
vips_error( "vips_colour_convert",
_( "no known route between '%s' and '%s'" ),
vips_enum_nick( VIPS_TYPE_INTERPRETATION,
interpretation ),
vips_enum_nick( VIPS_TYPE_INTERPRETATION,
convert->space ) );
return( -1 );
}
for( j = 0; vips_colour_routes[i].route[j]; j++ ) {
if( vips_colour_routes[i].route[j]( x, &t[j], NULL ) )
return( -1 );
x = t[j];
}
g_object_set( convert, "out", vips_image_new(), NULL );
if( vips_image_write( x, convert->out ) )
return( -1 );
return( 0 );
}
static void
vips_colour_convert_class_init( VipsColourConvertClass *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 = "colour_convert";
vobject_class->description = _( "convert to a new colourspace" );
vobject_class->build = vips_colour_convert_build;
VIPS_ARG_IMAGE( class, "in", 1,
_( "Output" ),
_( "Output image" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsColourConvert, in ) );
VIPS_ARG_IMAGE( class, "out", 2,
_( "Output" ),
_( "Output image" ),
VIPS_ARGUMENT_REQUIRED_OUTPUT,
G_STRUCT_OFFSET( VipsColourConvert, out ) );
VIPS_ARG_ENUM( class, "space", 6,
_( "Space" ),
_( "Destination colour space" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsColourConvert, space ),
VIPS_TYPE_INTERPRETATION, VIPS_INTERPRETATION_sRGB );
}
static void
vips_colour_convert_init( VipsColourConvert *convert )
{
}
/**
* vips_colour_convert:
* @in: input image
* @out: output image
* @space: convert to this colour space
*
* This convenience function looks at the interpretation field of @in and runs
* a set of colourspace conversion functions to move it to @space.
*
* For example, given an image tagged as #VIPS_INTERPRETATION_YXY, running
* vips_colour_convert() with @space set to #VIPS_INTERPRETATION_LAB will
* convert with vips_Yxy2XYZ() and vips_XYZ2Lab().
*/
int
vips_colour_convert( VipsImage *in, VipsImage **out,
VipsInterpretation space, ... )
{
va_list ap;
int result;
va_start( ap, space );
result = vips_call_split( "colour_convert", ap, in, out, space );
va_end( ap );
return( result );
}
/* Called from iofuncs to init all operations in this dir. Use a plugin system
* instead?
*/
void
vips_colour_operation_init( void )
{
extern GType vips_colourspace_get_type( void );
extern GType vips_Lab2XYZ_get_type( void );
extern GType vips_XYZ2Lab_get_type( void );
extern GType vips_Lab2LCh_get_type( void );
@ -857,7 +618,7 @@ vips_colour_operation_init( void )
extern GType vips_dE00_get_type( void );
extern GType vips_dECMC_get_type( void );
vips_colour_convert_get_type();
vips_colourspace_get_type();
vips_Lab2XYZ_get_type();
vips_XYZ2Lab_get_type();
vips_Lab2LCh_get_type();

284
libvips/colour/colourspace.c Normal file
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@ -0,0 +1,284 @@
/* convert between colourspaces
*/
/*
Copyright (C) 1991-2005 The National Gallery
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU 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 General Public License for more details.
You should have received a copy of the GNU 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
*/
/*
#define DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <vips/vips.h>
#include <vips/internal.h>
#include "colour.h"
/* A colour-transforming function.
*/
typedef int (*VipsColourTransformFn)( VipsImage *in, VipsImage **out, ... );
/* Maximum number of steps we allow in a route. 10 steps should be enough
* for anyone.
*/
#define MAX_STEPS (10)
/* A route between two colour spaces.
*
* 10 steps should be enough for anyone.
*/
typedef struct _VipsColourRoute {
VipsInterpretation from;
VipsInterpretation to;
VipsColourTransformFn route[MAX_STEPS + 1];
} VipsColourRoute;
/* Some defines to save typing. These are the colour spaces we support
* conversions between.
*/
#define XYZ VIPS_INTERPRETATION_XYZ
#define LAB VIPS_INTERPRETATION_LAB
#define LABQ VIPS_INTERPRETATION_LABQ
#define LCH VIPS_INTERPRETATION_LCH
#define CMC VIPS_INTERPRETATION_CMC
#define LABS VIPS_INTERPRETATION_LABS
#define sRGB VIPS_INTERPRETATION_sRGB
#define YXY VIPS_INTERPRETATION_YXY
/* All the routes we know about.
*/
static VipsColourRoute vips_colour_routes[] = {
{ XYZ, LAB, { vips_XYZ2Lab, NULL } },
{ XYZ, LABQ, { vips_XYZ2Lab, vips_Lab2LabQ, NULL } },
{ XYZ, LCH, { vips_XYZ2Lab, vips_Lab2LCh, NULL } },
{ XYZ, CMC, { vips_XYZ2Lab, vips_Lab2LCh, vips_LCh2CMC, NULL } },
{ XYZ, LABS, { vips_XYZ2Lab, vips_Lab2LabS, NULL } },
{ XYZ, sRGB, { vips_XYZ2sRGB, NULL } },
{ XYZ, YXY, { vips_XYZ2Yxy, NULL } },
{ LAB, XYZ, { vips_Lab2XYZ, NULL } },
{ LAB, LABQ, { vips_Lab2LabQ, NULL } },
{ LAB, LCH, { vips_Lab2LCh, NULL } },
{ LAB, CMC, { vips_Lab2LCh, vips_LCh2CMC, NULL } },
{ LAB, LABS, { vips_Lab2LabS, NULL } },
{ LAB, sRGB, { vips_Lab2XYZ, vips_XYZ2sRGB, NULL } },
{ LAB, YXY, { vips_Lab2XYZ, vips_XYZ2Yxy, NULL } },
{ LABQ, XYZ, { vips_LabQ2Lab, vips_Lab2XYZ, NULL } },
{ LABQ, LAB, { vips_LabQ2Lab, NULL } },
{ LABQ, LCH, { vips_LabQ2Lab, vips_Lab2LCh, NULL } },
{ LABQ, CMC, { vips_LabQ2Lab, vips_Lab2LCh, vips_LCh2CMC, NULL } },
{ LABQ, LABS, { vips_LabQ2LabS, NULL } },
{ LABQ, sRGB, { vips_LabQ2sRGB, NULL } },
{ LABQ, YXY, { vips_LabQ2Lab, vips_Lab2XYZ, vips_XYZ2Yxy, NULL } },
{ LCH, XYZ, { vips_LCh2Lab, vips_Lab2XYZ, NULL } },
{ LCH, LAB, { vips_LCh2Lab, NULL } },
{ LCH, LABQ, { vips_LCh2Lab, vips_Lab2LabQ, NULL } },
{ LCH, CMC, { vips_LCh2CMC, NULL } },
{ LCH, LABS, { vips_LCh2Lab, vips_Lab2LabS, NULL } },
{ LCH, sRGB, { vips_LCh2Lab, vips_Lab2XYZ, vips_XYZ2sRGB, NULL } },
{ LCH, YXY, { vips_LCh2Lab, vips_Lab2XYZ, vips_XYZ2Yxy, NULL } },
{ CMC, XYZ, { vips_CMC2LCh, vips_LCh2Lab, vips_Lab2XYZ, NULL } },
{ CMC, LAB, { vips_CMC2LCh, vips_LCh2Lab, NULL } },
{ CMC, LABQ, { vips_CMC2LCh, vips_LCh2Lab, vips_Lab2LabQ, NULL } },
{ CMC, LCH, { vips_CMC2LCh, NULL } },
{ CMC, LABS, { vips_CMC2LCh, vips_LCh2Lab, vips_Lab2LabS, NULL } },
{ CMC, sRGB, { vips_CMC2LCh, vips_LCh2Lab, vips_Lab2XYZ,
vips_XYZ2sRGB, NULL } },
{ CMC, YXY, { vips_CMC2LCh, vips_LCh2Lab, vips_Lab2XYZ,
vips_XYZ2Yxy, NULL } },
{ LABS, XYZ, { vips_LabS2Lab, vips_Lab2XYZ, NULL } },
{ LABS, LAB, { vips_LabS2Lab, NULL } },
{ LABS, LABQ, { vips_LabS2LabQ, NULL } },
{ LABS, LCH, { vips_LabS2Lab, vips_Lab2LCh, NULL } },
{ LABS, CMC, { vips_LabS2Lab, vips_Lab2LCh, vips_LCh2CMC, NULL } },
{ LABS, sRGB, { vips_LabS2Lab, vips_Lab2XYZ, vips_XYZ2sRGB, NULL } },
{ LABS, YXY, { vips_LabS2Lab, vips_Lab2XYZ, vips_XYZ2Yxy, NULL } },
{ sRGB, XYZ, { vips_sRGB2XYZ, NULL } },
{ sRGB, LAB, { vips_sRGB2XYZ, vips_XYZ2Lab, NULL } },
{ sRGB, LABQ, { vips_sRGB2XYZ, vips_XYZ2Lab, vips_Lab2LabQ, NULL } },
{ sRGB, LCH, { vips_sRGB2XYZ, vips_XYZ2Lab, vips_Lab2LCh, NULL } },
{ sRGB, CMC, { vips_sRGB2XYZ, vips_XYZ2Lab, vips_Lab2LCh,
vips_LCh2CMC, NULL } },
{ sRGB, LABS, { vips_sRGB2XYZ, vips_XYZ2Lab, vips_Lab2LabS, NULL } },
{ sRGB, YXY, { vips_sRGB2XYZ, vips_XYZ2Yxy, NULL } },
{ YXY, XYZ, { vips_Yxy2XYZ, NULL } },
{ YXY, LAB, { vips_Yxy2XYZ, vips_XYZ2Lab, NULL } },
{ YXY, LABQ, { vips_Yxy2XYZ, vips_XYZ2Lab, vips_Lab2LabQ, NULL } },
{ YXY, LCH, { vips_Yxy2XYZ, vips_XYZ2Lab, vips_Lab2LCh, NULL } },
{ YXY, CMC, { vips_Yxy2XYZ, vips_XYZ2Lab, vips_Lab2LCh,
vips_LCh2CMC, NULL } },
{ YXY, LABS, { vips_Yxy2XYZ, vips_XYZ2Lab, vips_Lab2LabS, NULL } },
{ YXY, sRGB, { vips_Yxy2XYZ, vips_XYZ2sRGB, NULL } },
};
typedef struct _VipsColourspace {
VipsOperation parent_instance;
VipsImage *in;
VipsImage *out;
VipsInterpretation space;
} VipsColourspace;
typedef VipsOperationClass VipsColourspaceClass;
G_DEFINE_TYPE( VipsColourspace, vips_colourspace, VIPS_TYPE_OPERATION );
static int
vips_colourspace_build( VipsObject *object )
{
VipsColourspace *colourspace = (VipsColourspace *) object;
int i, j;
VipsImage *x;
VipsImage **t;
VipsInterpretation interpretation;
t = (VipsImage **) vips_object_local_array( object, MAX_STEPS );
/* Verify that all input args have been set.
*/
if( VIPS_OBJECT_CLASS( vips_colourspace_parent_class )->
build( object ) )
return( -1 );
interpretation = vips_image_guess_interpretation( colourspace->in );
/* No conversion necessary.
*/
if( interpretation == colourspace->space ) {
g_object_set( colourspace, "out", vips_image_new(), NULL );
return( vips_image_write( colourspace->in, colourspace->out ) );
}
x = colourspace->in;
for( i = 0; i < VIPS_NUMBER( vips_colour_routes ); i++ )
if( vips_colour_routes[i].from == interpretation &&
vips_colour_routes[i].to == colourspace->space )
break;
if( i == VIPS_NUMBER( vips_colour_routes ) ) {
vips_error( "vips_colourspace",
_( "no known route between '%s' and '%s'" ),
vips_enum_nick( VIPS_TYPE_INTERPRETATION,
interpretation ),
vips_enum_nick( VIPS_TYPE_INTERPRETATION,
colourspace->space ) );
return( -1 );
}
for( j = 0; vips_colour_routes[i].route[j]; j++ ) {
if( vips_colour_routes[i].route[j]( x, &t[j], NULL ) )
return( -1 );
x = t[j];
}
g_object_set( colourspace, "out", vips_image_new(), NULL );
if( vips_image_write( x, colourspace->out ) )
return( -1 );
return( 0 );
}
static void
vips_colourspace_class_init( VipsColourspaceClass *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 = "colourspace";
vobject_class->description = _( "convert to a new colourspace" );
vobject_class->build = vips_colourspace_build;
VIPS_ARG_IMAGE( class, "in", 1,
_( "Input" ),
_( "Input image" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsColourspace, in ) );
VIPS_ARG_IMAGE( class, "out", 2,
_( "Output" ),
_( "Output image" ),
VIPS_ARGUMENT_REQUIRED_OUTPUT,
G_STRUCT_OFFSET( VipsColourspace, out ) );
VIPS_ARG_ENUM( class, "space", 6,
_( "Space" ),
_( "Destination colour space" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsColourspace, space ),
VIPS_TYPE_INTERPRETATION, VIPS_INTERPRETATION_sRGB );
}
static void
vips_colourspace_init( VipsColourspace *colourspace )
{
}
/**
* vips_colourspace:
* @in: input image
* @out: output image
* @space: convert to this colour space
*
* This convenience function looks at the interpretation field of @in and runs
* a set of colourspace conversion functions to move it to @space.
*
* For example, given an image tagged as #VIPS_INTERPRETATION_YXY, running
* vips_colourspace() with @space set to #VIPS_INTERPRETATION_LAB will
* convert with vips_Yxy2XYZ() and vips_XYZ2Lab().
*/
int
vips_colourspace( VipsImage *in, VipsImage **out,
VipsInterpretation space, ... )
{
va_list ap;
int result;
va_start( ap, space );
result = vips_call_split( "colourspace", ap, in, out, space );
va_end( ap );
return( result );
}

2
libvips/colour/dECMC.c
View File

@ -83,7 +83,7 @@ vips_dECMC_init( VipsdECMC *dECMC )
* transform the two source images to CMC yourself, scale the channels
* appropriately, and call this function.
*
* See also: vips_colour_convert()
* See also: vips_colourspace()
*
* Returns: 0 on success, -1 on error
*/

62
libvips/colour/icc_transform.c
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@ -973,15 +973,14 @@ vips_icc_transform( VipsImage *in, VipsImage **out,
* Returns: 0 on success, -1 on error.
*/
int
im_icc_ac2rc( VipsImage *in, VipsImage *out, const char *profile_filename )
vips_icc_ac2rc( VipsImage *in, VipsImage **out, const char *profile_filename )
{
VipsImage *t;
cmsHPROFILE profile;
double X, Y, Z;
double add[3];
double mul[3];
IMAGE *t[2];
double *add;
double *mul;
int i;
if( !(profile = cmsOpenProfileFromFile( profile_filename, "r" )) )
return( -1 );
@ -1018,41 +1017,36 @@ im_icc_ac2rc( VipsImage *in, VipsImage *out, const char *profile_filename )
cmsCloseProfile( profile );
add[0] = 0.0;
add[1] = 0.0;
add[2] = 0.0;
/* We need XYZ so we can adjust the white balance.
*/
if( vips_colourspace( in, &t, VIPS_INTERPRETATION_XYZ, NULL ) )
return( -1 );
in = t;
if( !(add = VIPS_ARRAY( in, in->Bands, double )) ||
!(mul = VIPS_ARRAY( in, in->Bands, double )) )
return( -1 );
/* There might be extra bands off to the right somewhere.
*/
for( i = 0; i < in->Bands; i++ )
add[i] = 0.0;
mul[0] = VIPS_D50_X0 / (X * 100.0);
mul[1] = VIPS_D50_Y0 / (Y * 100.0);
mul[2] = VIPS_D50_Z0 / (Z * 100.0);
/* Do IM_CODING_LABQ too.
*/
if( in->Coding == IM_CODING_LABQ ) {
IMAGE *t1 = im_open_local( out, "im_icc_ac2rc-1", "p" );
for( i = 3; i < in->Bands; i++ )
mul[i] = 1.0;
if( !t1 || im_LabQ2Lab( in, t1 ) )
return( -1 );
in = t1;
}
/* Do IM_CODING_RAD.
*/
if( in->Coding == IM_CODING_RAD ) {
IMAGE *t1 = im_open_local( out, "im_icc_export:1", "p" );
if( !t1 || im_rad2float( in, t1 ) )
return( -1 );
in = t1;
}
if( im_open_local_array( out, t, 2, "im_icc_ac2rc-2", "p" ) ||
im_Lab2XYZ_temp( in, t[0], IM_D50_X0, IM_D50_Y0, IM_D50_Z0 ) ||
im_lintra_vec( 3, mul, t[0], add, t[1] ) ||
im_XYZ2Lab_temp( t[1], out, IM_D50_X0, IM_D50_Y0, IM_D50_Z0 ) )
if( vips_linear( in, &t, add, mul, in->Bands, NULL ) ) {
g_object_unref( in );
return( -1 );
}
g_object_unref( in );
in = t;
*out = in;
return( 0 );
}

16
libvips/deprecated/vips7compat.c
View File

@ -2777,3 +2777,19 @@ im_dE00_fromLab( IMAGE *in1, IMAGE *in2, IMAGE *out )
return( 0 );
}
int
im_icc_ac2rc( VipsImage *in, VipsImage *out, const char *profile_filename )
{
VipsImage *x;
if( vips_icc_ac2rc( in, &x, profile_filename ) )
return( -1 );
if( im_copy( x, out ) ) {
g_object_unref( x );
return( -1 );
}
g_object_unref( x );
return( 0 );
}

2
libvips/foreign/foreign.c
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@ -1241,7 +1241,7 @@ vips_foreign_convert_saveable( VipsForeignSave *save )
if( in->Bands == 3 ) {
VipsImage *out;
if( vips_colour_convert( in, &out,
if( vips_colourspace( in, &out,
VIPS_INTERPRETATION_sRGB, NULL ) ) {
g_object_unref( in );
return( -1 );

4
libvips/include/vips/colour.h
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@ -110,7 +110,7 @@ typedef enum {
VIPS_INTENT_ABSOLUTE
} VipsIntent;
int vips_colour_convert( VipsImage *in, VipsImage **out,
int vips_colourspace( VipsImage *in, VipsImage **out,
VipsInterpretation space, ... )
__attribute__((sentinel));
@ -165,7 +165,7 @@ int vips_icc_import( VipsImage *in, VipsImage **out, ... )
__attribute__((sentinel));
int vips_icc_export( VipsImage *in, VipsImage **out, ... )
__attribute__((sentinel));
int vips_icc_ac2rc( VipsImage *in, VipsImage *out,
int vips_icc_ac2rc( VipsImage *in, VipsImage **out,
const char *profile_filename );
int vips_dE76( VipsImage *left, VipsImage *right, VipsImage **out, ... )