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icc checks input profile compat 

check the input profile colourspaces matches the image ... for example,
if a CMYK image has an embedded RGB profile, fall back to the specified
external profile

see:

https://github.com/jcupitt/libvips/issues/183
This commit is contained in:
John Cupitt 2014-09-29 11:04:53 +01:00
parent 1ce3b53a6d
commit b1827128ea
3 changed files with 108 additions and 49 deletions
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4
ChangeLog
View File

@ -1,3 +1,7 @@
8/9/14 started 7.40.10
- icc_import and icc_transform checks the input profile for compatibility
with the image, thanks James
8/9/14 started 7.40.9
- support jfif resunit "none"
- support GRAY as an input and output ICC space

6
configure.ac
View File

@ -2,7 +2,7 @@
# also update the version number in the m4 macros below
AC_INIT([vips], [7.40.9], [vipsip@jiscmail.ac.uk])
AC_INIT([vips], [7.40.10], [vipsip@jiscmail.ac.uk])
# required for gobject-introspection
AC_PREREQ(2.62)
@ -18,7 +18,7 @@ AC_CONFIG_MACRO_DIR([m4])
# user-visible library versioning
m4_define([vips_major_version], [7])
m4_define([vips_minor_version], [40])
m4_define([vips_micro_version], [9])
m4_define([vips_micro_version], [10])
m4_define([vips_version],
[vips_major_version.vips_minor_version.vips_micro_version])
@ -38,7 +38,7 @@ VIPS_VERSION_STRING=$VIPS_VERSION-`date`
# binary interface changes not backwards compatible?: reset age to 0
LIBRARY_CURRENT=38
LIBRARY_REVISION=6
LIBRARY_REVISION=7
LIBRARY_AGE=0
# patched into include/vips/version.h

147
libvips/colour/icc_transform.c
View File

@ -28,6 +28,9 @@
* - support XYZ as an alternative PCS
* 10/9/14
* - support GRAY as an input and output space
* 29/9/14
* - check input profiles for compatibility with the input image, thanks
* James
*/
/*
@ -456,6 +459,86 @@ vips_check_intent( const char *domain,
_( "input" ) : _( "output" ) );
}
static int
vips_icc_profile_needs_bands( cmsHPROFILE profile )
{
int needs_bands;
switch( cmsGetColorSpace( profile ) ) {
#ifdef HAVE_LCMS2
case cmsSigGrayData:
needs_bands = 1;
break;
#endif /*HAVE_LCMS2*/
case cmsSigRgbData:
case cmsSigLabData:
case cmsSigXYZData:
needs_bands = 3;
break;
case cmsSigCmykData:
needs_bands = 4;
break;
default:
needs_bands = -1;
break;
}
return( needs_bands );
}
static cmsHPROFILE
vips_icc_load_profile_image( const char *domain, VipsImage *image )
{
void *data;
size_t data_length;
cmsHPROFILE profile;
if( !vips_image_get_typeof( image, VIPS_META_ICC_NAME ) )
return( NULL );
if( vips_image_get_blob( image, VIPS_META_ICC_NAME,
&data, &data_length ) ||
!(profile = cmsOpenProfileFromMem( data, data_length )) ) {
vips_warn( domain, "%s", _( "corrupt embedded profile" ) );
return( NULL );
}
if( image->Bands != vips_icc_profile_needs_bands( profile ) ) {
VIPS_FREEF( cmsCloseProfile, profile );
vips_warn( domain,
"%s", _( "embedded profile incompatible with image" ) );
return( NULL );
}
return( profile );
}
static cmsHPROFILE
vips_icc_load_profile_file( const char *domain,
VipsImage *image, const char *filename )
{
cmsHPROFILE profile;
if( !(profile = cmsOpenProfileFromFile( filename, "r" )) ) {
vips_error( domain,
_( "unable to open profile \"%s\"" ), filename );
return( NULL );
}
if( image->Bands != vips_icc_profile_needs_bands( profile ) ) {
VIPS_FREEF( cmsCloseProfile, profile );
vips_warn( domain,
_( "profile \"%s\" incompatible with image" ),
filename );
return( NULL );
}
return( profile );
}
static int
vips_icc_import_build( VipsObject *object )
{
@ -477,30 +560,16 @@ vips_icc_import_build( VipsObject *object )
if( code->in &&
(import->embedded ||
!import->input_profile_filename) &&
vips_image_get_typeof( code->in, VIPS_META_ICC_NAME ) ) {
void *data;
size_t data_length;
!import->input_profile_filename) )
icc->in_profile = vips_icc_load_profile_image( class->nickname,
code->in );
if( vips_image_get_blob( code->in, VIPS_META_ICC_NAME,
&data, &data_length ) ||
!(icc->in_profile = cmsOpenProfileFromMem(
data, data_length )) ) {
vips_error( class->nickname,
"%s", _( "unable to load embedded profile" ) );
return( -1 );
}
}
else if( import->input_profile_filename ) {
if( !(icc->in_profile = cmsOpenProfileFromFile(
import->input_profile_filename, "r" )) ) {
vips_error( class->nickname,
_( "unable to open profile \"%s\"" ),
import->input_profile_filename );
return( -1 );
}
}
else {
if( !icc->in_profile &&
import->input_profile_filename )
icc->in_profile = vips_icc_load_profile_file( class->nickname,
code->in, import->input_profile_filename );
if( !icc->in_profile ) {
vips_error( class->nickname, "%s", _( "no input profile" ) );
return( -1 );
}
@ -902,30 +971,16 @@ vips_icc_transform_build( VipsObject *object )
if( code->in &&
(transform->embedded ||
!transform->input_profile_filename) &&
vips_image_get_typeof( code->in, VIPS_META_ICC_NAME ) ) {
void *data;
size_t data_length;
!transform->input_profile_filename) )
icc->in_profile = vips_icc_load_profile_image( class->nickname,
code->in );
if( vips_image_get_blob( code->in, VIPS_META_ICC_NAME,
&data, &data_length ) ||
!(icc->in_profile = cmsOpenProfileFromMem(
data, data_length )) ) {
vips_error( class->nickname,
"%s", _( "unable to load embedded profile" ) );
return( -1 );
}
}
else if( transform->input_profile_filename ) {
if( !(icc->in_profile = cmsOpenProfileFromFile(
transform->input_profile_filename, "r" )) ) {
vips_error( class->nickname,
_( "unable to open profile \"%s\"" ),
transform->input_profile_filename );
return( -1 );
}
}
else {
if( !icc->in_profile &&
transform->input_profile_filename )
icc->in_profile = vips_icc_load_profile_file( class->nickname,
code->in, transform->input_profile_filename );
if( !icc->in_profile ) {
vips_error( class->nickname, "%s", _( "no input profile" ) );
return( -1 );
}