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add scRGB functions

This commit is contained in:
John Cupitt 2012-12-11 15:25:28 +00:00
parent 1bddb78f6a
commit c341f0d134
15 changed files with 767 additions and 82 deletions
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1
ChangeLog
View File

@ -31,6 +31,7 @@
- add binary complex operations, with cross_phase as the only one so far
- added vips_bandbool(), with vips_bandand(), _bandor(), _bandeor() as
convenience functions
- added scRGB colourspace, linear light float space with sRGB primaries
14/11/12 started 7.30.6
- capture tiff warnings earlier

7
TODO
View File

@ -1,3 +1,10 @@
- get rid of RGB, RGB16, just have sRGB and scRGB? maybe get rid of GREY16
too?
- get rid of sRGB2XYZ? is using two ops much slower?
- add colourconvert paths for scRGB
- now we've removed round-to-nearest from NN, we need something extra in the
affine transform to displace the input cods

121
libvips/colour/LabQ2sRGB.c
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@ -98,6 +98,29 @@ static VipsPel vips_red[64 * 64 * 64];
static VipsPel vips_green[64 * 64 * 64];
static VipsPel vips_blue[64 * 64 * 64];
/* sRGB to scRGB.
*
* @range is eg. 256 for 8-bit data.
*/
static int
vips_col_sRGB2scRGB( int range, float *lut,
int r, int g, int b, float *R, float *G, float *B )
{
int maxval = range - 1;
int i;
i = VIPS_CLIP( 0, r, maxval );
*R = lut[i];
i = VIPS_CLIP( 0, g, maxval );
*G = lut[i];
i = VIPS_CLIP( 0, b, maxval );
*B = lut[i];
return( 0 );
}
/* Create the sRGB linear and unlinear luts. @range is eg. 256 for 8-bit luts.
*/
static void
@ -156,58 +179,12 @@ vips_col_make_tables_RGB_8( void )
}
}
/* sRGB to scRGB.
*
* @range is eg. 256 for 8-bit data.
*/
static int
vips_col_sRGB2scRGB( int range, float *lut,
int r, int g, int b, float *R, float *G, float *B )
{
int maxval = range - 1;
int i;
i = VIPS_CLIP( 0, r, maxval );
*R = lut[i];
i = VIPS_CLIP( 0, g, maxval );
*G = lut[i];
i = VIPS_CLIP( 0, b, maxval );
*B = lut[i];
return( 0 );
}
/* We need Y in 0 - 100. We can save three muls later if we pre-scale the
* matrix.
*
* The matrix already includes the D65 channel weighting, so we just scale by
* Y.
*/
#define SCALE (VIPS_D65_Y0)
/* scRGB to XYZ.
*/
static int
vips_col_scRGB2XYZ( float R, float G, float B, float *X, float *Y, float *Z )
{
*X = SCALE * 0.4124 * R + SCALE * 0.3576 * G + SCALE * 0.18056 * B;
*Y = SCALE * 0.2126 * R + SCALE * 0.7152 * G + SCALE * 0.07220 * B;
*Z = SCALE * 0.0193 * R + SCALE * 0.1192 * G + SCALE * 0.9505 * B;
return( 0 );
}
int
vips_col_sRGB2XYZ_8( int r, int g, int b, float *X, float *Y, float *Z )
vips_col_sRGB2scRGB_8( int r, int g, int b, float *R, float *G, float *B )
{
float R, G, B;
vips_col_make_tables_RGB_8();
return( vips_col_sRGB2scRGB( 256, vips_v2Y_8, r, g, b, &R, &G, &B ) ||
vips_col_scRGB2XYZ( R, G, B, X, Y, Z ) );
return( vips_col_sRGB2scRGB( 256, vips_v2Y_8, r, g, b, R, G, B ) );
}
static void *
@ -235,20 +212,33 @@ vips_col_make_tables_RGB_16( void )
}
int
vips_col_sRGB2XYZ_16( int r, int g, int b, float *X, float *Y, float *Z )
vips_col_sRGB2scRGB_16( int r, int g, int b, float *R, float *G, float *B )
{
float R, G, B;
vips_col_make_tables_RGB_16();
return( vips_col_sRGB2scRGB( 65536, vips_v2Y_16,
r, g, b, &R, &G, &B ) ||
vips_col_scRGB2XYZ( R, G, B, X, Y, Z ) );
return( vips_col_sRGB2scRGB( 65536, vips_v2Y_16, r, g, b, R, G, B ) );
}
/* The matrix already includes the D65 channel weighting, so we just scale by
* Y.
*/
#define SCALE (VIPS_D65_Y0)
/* scRGB to XYZ.
*/
int
vips_col_scRGB2XYZ( float R, float G, float B, float *X, float *Y, float *Z )
{
*X = SCALE * 0.4124 * R + SCALE * 0.3576 * G + SCALE * 0.18056 * B;
*Y = SCALE * 0.2126 * R + SCALE * 0.7152 * G + SCALE * 0.07220 * B;
*Z = SCALE * 0.0193 * R + SCALE * 0.1192 * G + SCALE * 0.9505 * B;
return( 0 );
}
/* Turn XYZ into scRGB.
*/
static int
int
vips_col_XYZ2scRGB( float X, float Y, float Z, float *R, float *G, float *B )
{
*R = 3.2406 / SCALE * X + -1.5372 / SCALE * Y + -0.4986 / SCALE * Z;
@ -335,31 +325,24 @@ vips_col_scRGB2sRGB( int range, int *lut,
}
int
vips_col_XYZ2sRGB_8( float X, float Y, float Z,
vips_col_scRGB2sRGB_8( float R, float G, float B,
int *r, int *g, int *b,
int *or )
{
float R, G, B;
vips_col_make_tables_RGB_8();
return( vips_col_XYZ2scRGB( X, Y, Z, &R, &G, &B ) ||
vips_col_scRGB2sRGB( 256, vips_Y2v_8,
R, G, B, r, g, b, or ) );
return( vips_col_scRGB2sRGB( 256, vips_Y2v_8, R, G, B, r, g, b, or ) );
}
int
vips_col_XYZ2sRGB_16( float X, float Y, float Z,
vips_col_scRGB2sRGB_16( float R, float G, float B,
int *r, int *g, int *b,
int *or )
{
float R, G, B;
vips_col_make_tables_RGB_16();
return( vips_col_XYZ2scRGB( X, Y, Z, &R, &G, &B ) ||
vips_col_scRGB2sRGB( 65536, vips_Y2v_16,
R, G, B, r, g, b, or ) );
return( vips_col_scRGB2sRGB( 65536, vips_Y2v_16,
R, G, B, r, g, b, or ) );
}
/* Build Lab->disp dither tables.
@ -379,11 +362,13 @@ build_tables( void *client )
float A = (signed char) (a << 2);
float B = (signed char) (b << 2);
float X, Y, Z;
float Rf, Gf, Bf;
int rb, gb, bb;
int oflow;
vips_col_Lab2XYZ( L, A, B, &X, &Y, &Z );
vips_col_XYZ2sRGB_8( X, Y, Z,
vips_col_XYZ2scRGB( X, Y, Z, &Rf, &Gf, &Bf );
vips_col_scRGB2sRGB_8( Rf, Gf, Bf,
&rb, &gb, &bb, &oflow );
t = INDEX( l, a, b );

6
libvips/colour/Makefile.am
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@ -26,6 +26,10 @@ libcolour_la_SOURCES = \
LabQ2LabS.c \
LabQ2sRGB.c \
XYZ2sRGB.c \
sRGB2XYZ.c
sRGB2XYZ.c \
sRGB2scRGB.c \
scRGB2XYZ.c \
XYZ2scRGB.c \
scRGB2sRGB.c
INCLUDES = -I${top_srcdir}/libvips/include @VIPS_CFLAGS@ @VIPS_INCLUDES@

8
libvips/colour/XYZ2sRGB.c
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@ -85,10 +85,12 @@ vips_XYZ2sRGB_line_8( VipsPel *q, float *p, int width )
float Y = p[1];
float Z = p[2];
float R, G, B;
int r, g, b;
int or;
vips_col_XYZ2sRGB_8( X, Y, Z, &r, &g, &b, &or );
vips_col_XYZ2scRGB( X, Y, Z, &R, &G, &B );
vips_col_scRGB2sRGB_8( R, G, B, &r, &g, &b, &or );
p += 3;
@ -110,10 +112,12 @@ vips_XYZ2sRGB_line_16( unsigned short *q, float *p, int width )
float Y = p[1];
float Z = p[2];
float R, G, B;
int r, g, b;
int or;
vips_col_XYZ2sRGB_16( X, Y, Z, &r, &g, &b, &or );
vips_col_XYZ2scRGB( X, Y, Z, &R, &G, &B );
vips_col_scRGB2sRGB_16( R, G, B, &r, &g, &b, &or );
p += 3;

118
libvips/colour/XYZ2scRGB.c Normal file
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@ -0,0 +1,118 @@
/* Turn XYZ to scRGB colourspace.
*
* 11/12/12
* - from Yxy2XYZ.c
*/
/*
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 VipsColourSpace VipsXYZ2scRGB;
typedef VipsColourSpaceClass VipsXYZ2scRGBClass;
G_DEFINE_TYPE( VipsXYZ2scRGB, vips_XYZ2scRGB, VIPS_TYPE_COLOUR_SPACE );
void
vips_XYZ2scRGB_line( VipsColour *colour, VipsPel *out, VipsPel **in, int width )
{
float *p = (float *) in[0];
float *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
*
* Turn XYZ to Yxy.
*
* 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 );
}

8
libvips/colour/colour.c
View File

@ -798,6 +798,10 @@ vips_colour_operation_init( void )
extern GType vips_LabQ2sRGB_get_type( void );
extern GType vips_XYZ2sRGB_get_type( void );
extern GType vips_sRGB2XYZ_get_type( void );
extern GType vips_sRGB2scRGB_get_type( void );
extern GType vips_scRGB2XYZ_get_type( void );
extern GType vips_XYZ2scRGB_get_type( void );
extern GType vips_scRGB2sRGB_get_type( void );
#if defined(HAVE_LCMS) || defined(HAVE_LCMS2)
extern GType vips_icc_import_get_type( void );
extern GType vips_icc_export_get_type( void );
@ -827,6 +831,10 @@ vips_colour_operation_init( void )
vips_LabQ2sRGB_get_type();
vips_XYZ2sRGB_get_type();
vips_sRGB2XYZ_get_type();
vips_sRGB2scRGB_get_type();
vips_scRGB2XYZ_get_type();
vips_XYZ2scRGB_get_type();
vips_scRGB2sRGB_get_type();
#if defined(HAVE_LCMS) || defined(HAVE_LCMS2)
vips_icc_import_get_type();
vips_icc_export_get_type();

12
libvips/colour/sRGB2XYZ.c
View File

@ -10,7 +10,7 @@
* - redone as a class
* - sRGB only, support for other RGBs is now via lcms
* 6/11/12
* - add 15-bit sRGB import
* - add 16-bit sRGB import
*/
/*
@ -67,11 +67,14 @@ vips_sRGB2XYZ_line_8( float *q, VipsPel *p, int width )
int r = p[0];
int g = p[1];
int b = p[2];
float R, G, B;
float X, Y, Z;
p += 3;
vips_col_sRGB2XYZ_8( r, g, b, &X, &Y, &Z );
vips_col_sRGB2scRGB_8( r, g, b, &R, &G, &B );
vips_col_scRGB2XYZ( R, G, B, &X, &Y, &Z );
q[0] = X;
q[1] = Y;
@ -92,11 +95,14 @@ vips_sRGB2XYZ_line_16( float *q, unsigned short *p, int width )
int r = p[0];
int g = p[1];
int b = p[2];
float R, G, B;
float X, Y, Z;
p += 3;
vips_col_sRGB2XYZ_16( r, g, b, &X, &Y, &Z );
vips_col_sRGB2scRGB_16( r, g, b, &R, &G, &B );
vips_col_scRGB2XYZ( R, G, B, &X, &Y, &Z );
q[0] = X;
q[1] = Y;

186
libvips/colour/sRGB2scRGB.c Normal file
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@ -0,0 +1,186 @@
/* Turn displayable rgb files to scRGB.
*
* 11/12/12
* - from sRGB2XYZ.c
*/
/*
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 VipsColourCode VipssRGB2scRGB;
typedef VipsColourCodeClass VipssRGB2scRGBClass;
G_DEFINE_TYPE( VipssRGB2scRGB, vips_sRGB2scRGB, VIPS_TYPE_COLOUR_CODE );
/* Convert a buffer of 8-bit pixels.
*/
static void
vips_sRGB2scRGB_line_8( float *q, VipsPel *p, int width )
{
int i;
for( i = 0; i < width; i++ ) {
int r = p[0];
int g = p[1];
int b = p[2];
float R, G, B;
p += 3;
vips_col_sRGB2scRGB_8( r, g, b, &R, &G, &B );
q[0] = R;
q[1] = G;
q[2] = B;
q += 3;
}
}
/* Convert a buffer of 16-bit pixels.
*/
static void
vips_sRGB2scRGB_line_16( float *q, unsigned short *p, int width )
{
int i;
for( i = 0; i < width; i++ ) {
int r = p[0];
int g = p[1];
int b = p[2];
float R, G, B;
p += 3;
vips_col_sRGB2scRGB_16( r, g, b, &R, &G, &B );
q[0] = R;
q[1] = G;
q[2] = B;
q += 3;
}
}
static void
vips_sRGB2scRGB_line( VipsColour *colour,
VipsPel *out, VipsPel **in, int width )
{
if( colour->in[0]->BandFmt == VIPS_FORMAT_UCHAR )
vips_sRGB2scRGB_line_8( (float *) out,
(VipsPel *) in[0], width );
else
vips_sRGB2scRGB_line_16( (float *) out,
(unsigned short *) in[0], width );
}
static int
vips_sRGB2scRGB_build( VipsObject *object )
{
VipsColourCode *code = (VipsColourCode *) object;
if( code->in )
code->input_format =
code->in->BandFmt == VIPS_FORMAT_USHORT ?
VIPS_FORMAT_USHORT : VIPS_FORMAT_UCHAR;
if( VIPS_OBJECT_CLASS( vips_sRGB2scRGB_parent_class )->
build( object ) )
return( -1 );
return( 0 );
}
static void
vips_sRGB2scRGB_class_init( VipssRGB2scRGBClass *class )
{
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsColourClass *colour_class = VIPS_COLOUR_CLASS( class );
object_class->nickname = "sRGB2scRGB";
object_class->description = _( "convert an sRGB image to scRGB" );
object_class->build = vips_sRGB2scRGB_build;
colour_class->process_line = vips_sRGB2scRGB_line;
}
static void
vips_sRGB2scRGB_init( VipssRGB2scRGB *sRGB2scRGB )
{
VipsColour *colour = VIPS_COLOUR( sRGB2scRGB );
VipsColourCode *code = VIPS_COLOUR_CODE( sRGB2scRGB );
colour->coding = VIPS_CODING_NONE;
colour->interpretation = VIPS_INTERPRETATION_scRGB;
colour->format = VIPS_FORMAT_FLOAT;
colour->bands = 3;
code->input_coding = VIPS_CODING_NONE;
code->input_bands = 3;
/* The default. This can get changed above ^^ if we see a
* 16-bit input.
*/
code->input_format = VIPS_FORMAT_UCHAR;
}
/**
* vips_sRGB2scRGB:
* @in: input image
* @out: output image
*
* Convert an sRGB image to scRGB.
*
* See also: vips_sRGB2XYZ(), vips_rad2float().
*
* Returns: 0 on success, -1 on error.
*/
int
vips_sRGB2scRGB( VipsImage *in, VipsImage **out, ... )
{
va_list ap;
int result;
va_start( ap, out );
result = vips_call_split( "sRGB2scRGB", ap, in, out );
va_end( ap );
return( result );
}

123
libvips/colour/scRGB2XYZ.c Normal file
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@ -0,0 +1,123 @@
/* Turn scRGB to XYZ colourspace.
*
* Modified:
* 29/5/02 JC
* - from lab2xyz
* 2/11/09
* - gtkdoc
* - cleanups
* 20/9/12
* redo 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 VipsColourSpace VipsscRGB2XYZ;
typedef VipsColourSpaceClass VipsscRGB2XYZClass;
G_DEFINE_TYPE( VipsscRGB2XYZ, vips_scRGB2XYZ, VIPS_TYPE_COLOUR_SPACE );
void
vips_scRGB2XYZ_line( VipsColour *colour, VipsPel *out, VipsPel **in, int width )
{
float *p = (float *) in[0];
float *q = (float *) out;
int i;
for( i = 0; i < width; i++ ) {
float R = p[0];
float G = p[1];
float B = p[2];
float X, Y, Z;
p += 3;
vips_col_scRGB2XYZ( R, G, B, &X, &Y, &Z );
q[0] = X;
q[1] = Y;
q[2] = Z;
q += 3;
}
}
static void
vips_scRGB2XYZ_class_init( VipsscRGB2XYZClass *class )
{
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsColourClass *colour_class = VIPS_COLOUR_CLASS( class );
object_class->nickname = "scRGB2XYZ";
object_class->description = _( "transform scRGB to XYZ" );
colour_class->process_line = vips_scRGB2XYZ_line;
}
static void
vips_scRGB2XYZ_init( VipsscRGB2XYZ *scRGB2XYZ )
{
VipsColour *colour = VIPS_COLOUR( scRGB2XYZ );
colour->interpretation = VIPS_INTERPRETATION_XYZ;
}
/**
* vips_scRGB2XYZ:
* @in: input image
* @out: output image
*
* Turn XYZ to scRGB.
*
* Returns: 0 on success, -1 on error
*/
int
vips_scRGB2XYZ( VipsImage *in, VipsImage **out, ... )
{
va_list ap;
int result;
va_start( ap, out );
result = vips_call_split( "scRGB2XYZ", ap, in, out );
va_end( ap );
return( result );
}

222
libvips/colour/scRGB2sRGB.c Normal file
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@ -0,0 +1,222 @@
/* Turn scRGB files into displayable rgb.
*
* 11/12/12
* - from XYZ2sRGB.c
*/
/*
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 struct _VipsscRGB2sRGB {
VipsColourCode parent_instance;
int depth;
} VipsscRGB2sRGB;
typedef VipsColourCodeClass VipsscRGB2sRGBClass;
G_DEFINE_TYPE( VipsscRGB2sRGB, vips_scRGB2sRGB, VIPS_TYPE_COLOUR_CODE );
/* Process a buffer of data.
*/
static void
vips_scRGB2sRGB_line_8( VipsPel *q, float *p, int width )
{
int i;
for( i = 0; i < width; i++ ) {
float R = p[0];
float G = p[1];
float B = p[2];
int r, g, b;
int or;
vips_col_scRGB2sRGB_8( R, G, B, &r, &g, &b, &or );
p += 3;
q[0] = r;
q[1] = g;
q[2] = b;
q += 3;
}
}
static void
vips_scRGB2sRGB_line_16( unsigned short *q, float *p, int width )
{
int i;
for( i = 0; i < width; i++ ) {
float R = p[0];
float G = p[1];
float B = p[2];
int r, g, b;
int or;
vips_col_scRGB2sRGB_16( R, G, B, &r, &g, &b, &or );
p += 3;
q[0] = r;
q[1] = g;
q[2] = b;
q += 3;
}
}
static void
vips_scRGB2sRGB_line( VipsColour *colour,
VipsPel *out, VipsPel **in, int width )
{
VipsscRGB2sRGB *scRGB2sRGB = (VipsscRGB2sRGB *) colour;
if( scRGB2sRGB->depth == 16 )
vips_scRGB2sRGB_line_16( (unsigned short *) out,
(float *) in[0], width );
else
vips_scRGB2sRGB_line_8( (VipsPel *) out,
(float *) in[0], width );
}
static int
vips_scRGB2sRGB_build( VipsObject *object )
{
VipsObjectClass *class = VIPS_OBJECT_GET_CLASS( object );
VipsscRGB2sRGB *scRGB2sRGB = (VipsscRGB2sRGB *) object;
VipsColour *colour = VIPS_COLOUR( scRGB2sRGB );
switch( scRGB2sRGB->depth ) {
case 16:
colour->interpretation = VIPS_INTERPRETATION_RGB16;
colour->format = VIPS_FORMAT_USHORT;
break;
case 8:
colour->interpretation = VIPS_INTERPRETATION_sRGB;
colour->format = VIPS_FORMAT_UCHAR;
break;
default:
vips_error( class->nickname,
"%s", _( "depth must be 8 or 16" ) );
return( -1 );
}
if( VIPS_OBJECT_CLASS( vips_scRGB2sRGB_parent_class )->build( object ) )
return( -1 );
return( 0 );
}
static void
vips_scRGB2sRGB_class_init( VipsscRGB2sRGBClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *object_class = (VipsObjectClass *) class;
VipsColourClass *colour_class = VIPS_COLOUR_CLASS( class );
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
object_class->nickname = "scRGB2sRGB";
object_class->description = _( "convert an scRGB image to sRGB" );
object_class->build = vips_scRGB2sRGB_build;
colour_class->process_line = vips_scRGB2sRGB_line;
VIPS_ARG_INT( class, "depth", 130,
_( "Depth" ),
_( "Output device space depth in bits" ),
VIPS_ARGUMENT_OPTIONAL_INPUT,
G_STRUCT_OFFSET( VipsscRGB2sRGB, depth ),
8, 16, 8 );
}
static void
vips_scRGB2sRGB_init( VipsscRGB2sRGB *scRGB2sRGB )
{
VipsColour *colour = VIPS_COLOUR( scRGB2sRGB );
VipsColourCode *code = VIPS_COLOUR_CODE( scRGB2sRGB );
/* Just the default, can be overridden, see above.
*/
colour->coding = VIPS_CODING_NONE;
colour->interpretation = VIPS_INTERPRETATION_sRGB;
colour->format = VIPS_FORMAT_UCHAR;
colour->bands = 3;
code->input_coding = VIPS_CODING_NONE;
code->input_bands = 3;
code->input_format = VIPS_FORMAT_FLOAT;
scRGB2sRGB->depth = 8;
}
/**
* vips_scRGB2sRGB:
* @in: input image
* @out: output image
*
* Optional arguments:
*
* @depth: depth of output image in bits
*
* Convert an scRGB image to sRGB. Set @depth to 16 to get 16-bit output.
*
* See also: im_LabS2LabQ(), im_scRGB2sRGB(), im_rad2float().
*
* Returns: 0 on success, -1 on error.
*/
int
vips_scRGB2sRGB( VipsImage *in, VipsImage **out, ... )
{
va_list ap;
int result;
va_start( ap, out );
result = vips_call_split( "scRGB2sRGB", ap, in, out );
va_end( ap );
return( result );
}

30
libvips/include/vips/colour.h
View File

@ -141,10 +141,21 @@ int vips_Lab2XYZ( VipsImage *in, VipsImage **out, ... )
__attribute__((sentinel));
int vips_XYZ2Lab( VipsImage *in, VipsImage **out, ... )
__attribute__((sentinel));
int vips_XYZ2scRGB( VipsImage *in, VipsImage **out, ... )
__attribute__((sentinel));
int vips_scRGB2sRGB( VipsImage *in, VipsImage **out, ... )
__attribute__((sentinel));
int vips_XYZ2sRGB( VipsImage *in, VipsImage **out, ... )
__attribute__((sentinel));
int vips_sRGB2XYZ( VipsImage *in, VipsImage **out, ... )
__attribute__((sentinel));
int vips_sRGB2scRGB( VipsImage *in, VipsImage **out, ... )
__attribute__((sentinel));
int vips_scRGB2XYZ( VipsImage *in, VipsImage **out, ... )
__attribute__((sentinel));
int vips_LCh2CMC( VipsImage *in, VipsImage **out, ... )
__attribute__((sentinel));
int vips_CMC2LCh( VipsImage *in, VipsImage **out, ... )
@ -193,13 +204,20 @@ float vips_col_Lcmc2L( float Lcmc );
float vips_col_Ccmc2C( float Ccmc );
float vips_col_Chcmc2h( float C, float hcmc );
int vips_col_XYZ2sRGB_8( float X, float Y, float Z,
int *r, int *g, int *b, int *or_ret );
int vips_col_sRGB2XYZ_8( int r, int g, int b, float *X, float *Y, float *Z );
int vips_col_sRGB2scRGB_8( int r, int g, int b, float *R, float *G, float *B );
int vips_col_sRGB2scRGB_16( int r, int g, int b, float *R, float *G, float *B );
int vips_col_XYZ2sRGB_16( float X, float Y, float Z,
int *r, int *g, int *b, int *or_ret );
int vips_col_sRGB2XYZ_16( int r, int g, int b, float *X, float *Y, float *Z );
int vips_col_scRGB2XYZ( float R, float G, float B,
float *X, float *Y, float *Z );
int vips_col_XYZ2scRGB( float X, float Y, float Z,
float *R, float *G, float *B );
int vips_col_scRGB2sRGB_8( float R, float G, float B,
int *r, int *g, int *b,
int *or_ret );
int vips_col_scRGB2sRGB_16( float R, float G, float B,
int *r, int *g, int *b,
int *or_ret );
float vips_pythagoras( float L1, float a1, float b1,
float L2, float a2, float b2 );

4
libvips/include/vips/image.h
View File

@ -122,6 +122,7 @@ typedef enum {
* @VIPS_INTERPRETATION_LCH: pixels are in CIE LCh space
* @VIPS_INTERPRETATION_LABS: CIE LAB coded as three signed 16-bit values
* @VIPS_INTERPRETATION_sRGB: pixels are sRGB
* @VIPS_INTERPRETATION_scRGB: pixels are scRGB
* @VIPS_INTERPRETATION_YXY: pixels are CIE Yxy
* @VIPS_INTERPRETATION_RGB16: generic 16-bit RGB
* @VIPS_INTERPRETATION_GREY16: generic 16-bit mono
@ -156,7 +157,8 @@ typedef enum {
VIPS_INTERPRETATION_FOURIER = 24,
VIPS_INTERPRETATION_RGB16 = 25,
VIPS_INTERPRETATION_GREY16 = 26,
VIPS_INTERPRETATION_ARRAY = 27
VIPS_INTERPRETATION_ARRAY = 27,
VIPS_INTERPRETATION_scRGB = 28
} VipsInterpretation;
/**

1
libvips/iofuncs/enumtypes.c
View File

@ -493,6 +493,7 @@ vips_interpretation_get_type( void )
{VIPS_INTERPRETATION_RGB16, "VIPS_INTERPRETATION_RGB16", "rgb16"},
{VIPS_INTERPRETATION_GREY16, "VIPS_INTERPRETATION_GREY16", "grey16"},
{VIPS_INTERPRETATION_ARRAY, "VIPS_INTERPRETATION_ARRAY", "array"},
{VIPS_INTERPRETATION_scRGB, "VIPS_INTERPRETATION_scRGB", "scrgb"},
{0, NULL, NULL}
};

2
libvips/iofuncs/image.c
View File

@ -457,7 +457,7 @@ vips_image_sanity( VipsObject *object, VipsBuf *buf )
image->Coding != VIPS_CODING_NONE &&
image->Coding != VIPS_CODING_LABQ &&
image->Coding != VIPS_CODING_RAD) ||
image->Type > VIPS_INTERPRETATION_ARRAY ||
image->Type > VIPS_INTERPRETATION_scRGB ||
image->dtype > VIPS_IMAGE_PARTIAL ||
image->dhint > VIPS_DEMAND_STYLE_ANY )
vips_buf_appends( buf, "bad enum\n" );