reactos/dll/win32/mscms/icc.c

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/*
* MSCMS - Color Management System for Wine
*
* Copyright 2004, 2005 Hans Leidekker
*
* 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 St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "wine/winternl.h"
#include "icm.h"
#include "mscms_priv.h"
#ifdef HAVE_LCMS2
static inline void adjust_endianness32( ULONG *ptr )
{
#ifndef WORDS_BIGENDIAN
*ptr = RtlUlongByteSwap(*ptr);
#endif
}
void get_profile_header( const struct profile *profile, PROFILEHEADER *header )
{
unsigned int i;
memcpy( header, profile->data, sizeof(PROFILEHEADER) );
/* ICC format is big-endian, swap bytes if necessary */
for (i = 0; i < sizeof(PROFILEHEADER) / sizeof(ULONG); i++)
adjust_endianness32( (ULONG *)header + i );
}
void set_profile_header( const struct profile *profile, const PROFILEHEADER *header )
{
unsigned int i;
memcpy( profile->data, header, sizeof(PROFILEHEADER) );
/* ICC format is big-endian, swap bytes if necessary */
for (i = 0; i < sizeof(PROFILEHEADER) / sizeof(ULONG); i++)
adjust_endianness32( (ULONG *)profile->data + i );
}
static BOOL get_adjusted_tag( const struct profile *profile, TAGTYPE type, cmsTagEntry *tag )
{
DWORD i, num_tags = *(DWORD *)(profile->data + sizeof(cmsICCHeader));
cmsTagEntry *entry;
ULONG sig;
adjust_endianness32( &num_tags );
for (i = 0; i < num_tags; i++)
{
entry = (cmsTagEntry *)(profile->data + sizeof(cmsICCHeader) + sizeof(DWORD) + i * sizeof(*tag));
sig = entry->sig;
adjust_endianness32( &sig );
if (sig == type)
{
tag->sig = sig;
tag->offset = entry->offset;
tag->size = entry->size;
adjust_endianness32( &tag->offset );
adjust_endianness32( &tag->size );
return TRUE;
}
}
return FALSE;
}
BOOL get_tag_data( const struct profile *profile, TAGTYPE type, DWORD offset, void *buffer, DWORD *len )
{
cmsTagEntry tag;
if (!get_adjusted_tag( profile, type, &tag )) return FALSE;
if (!buffer) offset = 0;
if (offset > tag.size) return FALSE;
if (*len < tag.size - offset || !buffer)
{
*len = tag.size - offset;
return FALSE;
}
memcpy( buffer, profile->data + tag.offset + offset, tag.size - offset );
*len = tag.size - offset;
return TRUE;
}
BOOL set_tag_data( const struct profile *profile, TAGTYPE type, DWORD offset, const void *buffer, DWORD *len )
{
cmsTagEntry tag;
if (!get_adjusted_tag( profile, type, &tag )) return FALSE;
if (offset > tag.size) return FALSE;
*len = min( tag.size - offset, *len );
memcpy( profile->data + tag.offset + offset, buffer, *len );
return TRUE;
}
#endif /* HAVE_LCMS2 */