1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/* Turn XYZ to scRGB colourspace.
*
* 11/12/12
* - from Yxy2XYZ.c
* 1/7/13
* - remove any ICC profile
* 25/11/14
* - oh argh, revert the above
*/
/*
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
*/
#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 "pcolour.h"
typedef VipsColourTransform VipsXYZ2scRGB;
typedef VipsColourTransformClass VipsXYZ2scRGBClass;
G_DEFINE_TYPE( VipsXYZ2scRGB, vips_XYZ2scRGB, VIPS_TYPE_COLOUR_TRANSFORM );
/* We used to have the comment:
* We've converted to sRGB without a profile. We must remove any ICC
* profile left over from import or there will be a mismatch between
* pixel values and the attached profile.
But this isn't right, we often call things sRGB that we know are not true
sRGB, for example:
vips sharpen k2.jpg x.jpg
sharpen will treat k2 as being in sRGB space even if that image has a
profile. If we drop the profile, x.jpg is suddenly untagged.
*/
void
vips_XYZ2scRGB_line( VipsColour *colour, VipsPel *out, VipsPel **in, int width )
{
float * restrict p = (float *) in[0];
float * restrict q = (float *) out;
int i;
for( i = 0; i < width; i++ ) {
float X = p[0];
float Y = p[1];
float Z = p[2];
float R, G, B;
p += 3;
vips_col_XYZ2scRGB( X, Y, Z, &R, &G, &B );
q[0] = R;
q[1] = G;
q[2] = B;
q += 3;
}
}
static void
vips_XYZ2scRGB_class_init( VipsXYZ2scRGBClass *class )
{
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsColourClass *colour_class = VIPS_COLOUR_CLASS( class );
object_class->nickname = "XYZ2scRGB";
object_class->description = _( "transform XYZ to scRGB" );
colour_class->process_line = vips_XYZ2scRGB_line;
}
static void
vips_XYZ2scRGB_init( VipsXYZ2scRGB *XYZ2scRGB )
{
VipsColour *colour = VIPS_COLOUR( XYZ2scRGB );
colour->interpretation = VIPS_INTERPRETATION_scRGB;
}
/**
* vips_XYZ2scRGB:
* @in: input image
* @out: output image
* @...: %NULL-terminated list of optional named arguments
*
* Turn XYZ to scRGB.
*
* Returns: 0 on success, -1 on error
*/
int
vips_XYZ2scRGB( VipsImage *in, VipsImage **out, ... )
{
va_list ap;
int result;
va_start( ap, out );
result = vips_call_split( "XYZ2scRGB", ap, in, out );
va_end( ap );
return( result );
}
|
