0337c09700
Use GLib's i18n support instead of copying and pasting that logic into its own header. This deprecates the vips/intl.h header in favour of glib/gi18n.h.
139 lines
2.7 KiB
C
139 lines
2.7 KiB
C
/* Turn Yxy to XYZ colourspace.
|
|
*
|
|
* Modified:
|
|
* 29/5/02 JC
|
|
* - from lab2xyz
|
|
* 2/11/09
|
|
* - gtkdoc
|
|
* - cleanups
|
|
* 20/9/12
|
|
* - redo as a class
|
|
* 29/8/19
|
|
* - avoid /0
|
|
*/
|
|
|
|
/*
|
|
|
|
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 <glib/gi18n-lib.h>
|
|
|
|
#include <stdio.h>
|
|
#include <math.h>
|
|
|
|
#include <vips/vips.h>
|
|
|
|
#include "pcolour.h"
|
|
|
|
typedef VipsColourTransform VipsYxy2XYZ;
|
|
typedef VipsColourTransformClass VipsYxy2XYZClass;
|
|
|
|
G_DEFINE_TYPE( VipsYxy2XYZ, vips_Yxy2XYZ, VIPS_TYPE_COLOUR_TRANSFORM );
|
|
|
|
void
|
|
vips_Yxy2XYZ_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 Y = p[0];
|
|
float x = p[1];
|
|
float y = p[2];
|
|
|
|
float X, Z;
|
|
|
|
if( x == 0.0 ||
|
|
y == 0.0 ) {
|
|
X = 0.0;
|
|
Z = 0.0;
|
|
}
|
|
else {
|
|
double total;
|
|
|
|
total = Y / y;
|
|
X = x * total;
|
|
Z = (X - x * X - x * Y) / x;
|
|
}
|
|
|
|
q[0] = X;
|
|
q[1] = Y;
|
|
q[2] = Z;
|
|
|
|
p += 3;
|
|
q += 3;
|
|
}
|
|
}
|
|
|
|
static void
|
|
vips_Yxy2XYZ_class_init( VipsYxy2XYZClass *class )
|
|
{
|
|
VipsObjectClass *object_class = (VipsObjectClass *) class;
|
|
VipsColourClass *colour_class = VIPS_COLOUR_CLASS( class );
|
|
|
|
object_class->nickname = "Yxy2XYZ";
|
|
object_class->description = _( "transform Yxy to XYZ" );
|
|
|
|
colour_class->process_line = vips_Yxy2XYZ_line;
|
|
}
|
|
|
|
static void
|
|
vips_Yxy2XYZ_init( VipsYxy2XYZ *Yxy2XYZ )
|
|
{
|
|
VipsColour *colour = VIPS_COLOUR( Yxy2XYZ );
|
|
|
|
colour->interpretation = VIPS_INTERPRETATION_XYZ;
|
|
}
|
|
|
|
/**
|
|
* vips_Yxy2XYZ: (method)
|
|
* @in: input image
|
|
* @out: (out): output image
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Turn XYZ to Yxy.
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_Yxy2XYZ( VipsImage *in, VipsImage **out, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, out );
|
|
result = vips_call_split( "Yxy2XYZ", ap, in, out );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|
|
|