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Hurstel
CGoGN
Commits
7718659d
Commit
7718659d
authored
Mar 15, 2011
by
Kenneth Vanhoey
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colourConverter
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367e9dd6
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include/Utils/colourConverter.h
include/Utils/colourConverter.h
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include/Utils/colourConverter.hpp
include/Utils/colourConverter.hpp
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include/Utils/colourConverter.h
0 → 100644
View file @
7718659d
/*******************************************************************************
* CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps *
* version 0.1 *
* Copyright (C) 2009, IGG Team, LSIIT, University of Strasbourg *
* *
* This library 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 2.1 of the License, or (at your *
* option) any later version. *
* *
* This library 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 library; if not, write to the Free Software Foundation, *
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
* *
* Web site: https://iggservis.u-strasbg.fr/CGoGN/ *
* Contact information: cgogn@unistra.fr *
* *
*******************************************************************************/
#ifndef __COLOURCONVERTER_H__
#define __COLOURCONVERTER_H__
#include "Geometry/vector_gen.h"
#include "Geometry/matrix.h"
namespace
CGoGN
{
namespace
Utils
{
/**
* Class for colour conversions between the enumerated colour spaces.
* Usage :
* VEC3 colRGB ; // current colour in RGB for example
* ColourConverter<REAL> cc(colRGB,C_RGB) ; // Tell constructor you provided RGB
* VEC3 colLuv = cc.getLuv() ; // ask whatever supported colour type you require
*
* All conversion formulae were provided by "Notes about color", january 5th, 2011 by B. Sauvage
*/
template
<
typename
REAL
>
class
ColourConverter
{
public:
// types
typedef
Geom
::
Vector
<
3
,
REAL
>
VEC3
;
enum
ColourEncoding
{
C_RGB
,
C_XYZ
,
C_Luv
}
;
public:
// methods
ColourConverter
(
VEC3
col
,
enum
ColourEncoding
enc
)
;
~
ColourConverter
()
{}
;
VEC3
getRGB
()
;
VEC3
getLuv
()
;
VEC3
getXYZ
()
;
public:
// members
enum
ColourEncoding
originalEnc
;
private:
// private members
VEC3
*
RGB
;
VEC3
*
Luv
;
VEC3
*
XYZ
;
bool
convert
(
enum
ColourEncoding
from
,
enum
ColourEncoding
to
)
;
void
convertRGBtoXYZ
()
;
void
convertXYZtoLuv
()
;
void
convertLuvToXYZ
()
;
void
convertXYZtoRGB
()
;
}
;
}
// namespace Utils
}
// namespace CGoGN
#include "colourConverter.hpp"
#endif // __COLOURCONVERTER_H__
include/Utils/colourConverter.hpp
0 → 100644
View file @
7718659d
/*******************************************************************************
* CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps *
* version 0.1 *
* Copyright (C) 2009, IGG Team, LSIIT, University of Strasbourg *
* *
* This library 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 2.1 of the License, or (at your *
* option) any later version. *
* *
* This library 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 library; if not, write to the Free Software Foundation, *
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
* *
* Web site: https://iggservis.u-strasbg.fr/CGoGN/ *
* Contact information: cgogn@unistra.fr *
* *
*******************************************************************************/
namespace
CGoGN
{
namespace
Utils
{
template
<
typename
REAL
>
ColourConverter
<
REAL
>::
ColourConverter
(
VEC3
col
,
enum
ColourEncoding
enc
)
:
RGB
(
NULL
),
Luv
(
NULL
),
XYZ
(
NULL
)
{
originalEnc
=
enc
;
switch
(
originalEnc
)
{
case
(
C_RGB
):
RGB
=
new
VEC3
(
col
)
;
break
;
case
(
C_Luv
)
:
Luv
=
new
VEC3
(
col
)
;
break
;
case
(
C_XYZ
)
:
XYZ
=
new
VEC3
(
col
)
;
break
;
}
}
template
<
typename
REAL
>
Geom
::
Vector
<
3
,
REAL
>
ColourConverter
<
REAL
>::
getRGB
()
{
if
(
RGB
==
NULL
)
convert
(
originalEnc
,
C_RGB
)
;
return
*
RGB
;
}
template
<
typename
REAL
>
Geom
::
Vector
<
3
,
REAL
>
ColourConverter
<
REAL
>::
getLuv
()
{
if
(
Luv
==
NULL
)
convert
(
originalEnc
,
C_Luv
)
;
return
*
Luv
;
}
template
<
typename
REAL
>
Geom
::
Vector
<
3
,
REAL
>
ColourConverter
<
REAL
>::
getXYZ
()
{
if
(
XYZ
==
NULL
)
{
convert
(
originalEnc
,
C_XYZ
)
;
}
return
*
XYZ
;
}
template
<
typename
REAL
>
void
ColourConverter
<
REAL
>::
convertRGBtoXYZ
()
{
Geom
::
Matrix
<
3
,
3
,
REAL
>
M
;
M
(
0
,
0
)
=
0.412453
;
M
(
0
,
1
)
=
0.357580
;
M
(
0
,
2
)
=
0.180423
;
M
(
1
,
0
)
=
0.212671
;
M
(
1
,
1
)
=
0.715160
;
M
(
1
,
2
)
=
0.072169
;
M
(
2
,
0
)
=
0.019334
;
M
(
2
,
1
)
=
0.119193
;
M
(
2
,
2
)
=
0.950227
;
VEC3
c
=
M
*
(
*
RGB
)
;
XYZ
=
new
VEC3
(
c
)
;
}
template
<
typename
REAL
>
void
ColourConverter
<
REAL
>::
convertXYZtoRGB
()
{
Geom
::
Matrix
<
3
,
3
,
REAL
>
M
;
M
(
0
,
0
)
=
3.240479
;
M
(
0
,
1
)
=
-
1.537150
;
M
(
0
,
2
)
=
-
0.498535
;
M
(
1
,
0
)
=
-
0.969256
;
M
(
1
,
1
)
=
1.875992
;
M
(
1
,
2
)
=
0.041556
;
M
(
2
,
0
)
=
0.055648
;
M
(
2
,
1
)
=
-
0.204043
;
M
(
2
,
2
)
=
1.057311
;
VEC3
c
=
M
*
(
*
XYZ
)
;
RGB
=
new
VEC3
(
c
)
;
}
template
<
typename
REAL
>
void
ColourConverter
<
REAL
>::
convertXYZtoLuv
()
{
REAL
L
,
u
,
v
;
REAL
&
X
=
(
*
XYZ
)[
0
]
;
REAL
&
Y
=
(
*
XYZ
)[
1
]
;
REAL
&
Z
=
(
*
XYZ
)[
2
]
;
if
(
Y
>
0.008856
)
L
=
116.0
f
*
pow
(
Y
,
1.0
f
/
3.0
)
-
16
;
else
// near black
L
=
903.3
*
Y
;
REAL
den
=
X
+
15.0
*
Y
+
3
*
Z
;
REAL
u1
=
(
4.0
*
X
)
/
den
;
REAL
v1
=
(
9.0
*
X
)
/
den
;
u
=
13
*
L
*
(
u1
-
0.197832
)
;
v
=
13
*
L
*
(
v1
-
0.468340
)
;
Luv
=
new
VEC3
(
L
,
u
,
v
)
;
}
template
<
typename
REAL
>
void
ColourConverter
<
REAL
>::
convertLuvToXYZ
()
{
REAL
X
,
Y
,
Z
;
REAL
&
L
=
(
*
Luv
)[
0
]
;
REAL
&
u
=
(
*
Luv
)[
1
]
;
REAL
&
v
=
(
*
Luv
)[
2
]
;
if
(
L
>
8.0
)
Y
=
pow
(((
L
+
16.0
)
/
116.0
),
3
)
;
else
// near black
Y
=
L
/
903.3
;
REAL
den
=
13.0
*
L
;
REAL
u1
=
u
/
den
+
0.197832
;
REAL
v1
=
v
/
den
+
0.468340
;
den
=
4.0
*
v1
;
X
=
Y
*
9.0
*
u1
/
den
;
Z
=
Y
*
(
12
-
3
*
u1
-
20
*
v1
)
/
den
;
XYZ
=
new
VEC3
(
X
,
Y
,
Z
)
;
}
template
<
typename
REAL
>
bool
ColourConverter
<
REAL
>::
convert
(
enum
ColourEncoding
from
,
enum
ColourEncoding
to
)
{
switch
(
from
)
{
case
(
C_RGB
)
:
switch
(
to
)
{
case
(
C_XYZ
)
:
if
(
XYZ
==
NULL
)
convertRGBtoXYZ
()
;
break
;
case
(
C_Luv
)
:
if
(
XYZ
==
NULL
)
convertRGBtoXYZ
()
;
if
(
Luv
==
NULL
)
convertXYZtoLuv
()
;
break
;
default
:
std
::
cerr
<<
"Colour conversion not supported"
<<
std
::
endl
;
return
false
;
}
break
;
case
(
C_Luv
)
:
switch
(
to
)
{
case
(
C_RGB
)
:
{
if
(
RGB
==
NULL
)
{
if
(
XYZ
==
NULL
)
convertLuvToXYZ
()
;
convertXYZtoRGB
()
;
}
break
;
}
case
(
C_XYZ
)
:
{
if
(
XYZ
==
NULL
)
convertLuvToXYZ
()
;
break
;
}
default
:
std
::
cerr
<<
"Colour conversion not supported"
<<
std
::
endl
;
return
false
;
}
break
;
case
(
C_XYZ
)
:
switch
(
to
)
{
case
(
C_RGB
)
:
if
(
RGB
==
NULL
)
convertXYZtoRGB
()
;
break
;
case
(
C_Luv
)
:
if
(
Luv
==
NULL
)
convertXYZtoLuv
()
;
break
;
default
:
std
::
cerr
<<
"Colour conversion not supported"
<<
std
::
endl
;
return
false
;
}
break
;
default
:
std
::
cerr
<<
"Colour conversion not supported"
<<
std
::
endl
;
return
false
;
}
return
true
;
}
}
// namespace Utils
}
// namespace CGoGN
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