dlls/mscms/icc.c

   1 /*
   2  * MSCMS - Color Management System for Wine
   3  *
   4  * Copyright 2004, 2005 Hans Leidekker
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "wingdi.h"
  26 #include "winuser.h"
  27 #include "winternl.h"
  28 #include "icm.h"
  29
  30 #include "mscms_priv.h"
  31
  32 static inline void adjust_endianness32( ULONG *ptr )
  33 {
  34 #ifndef WORDS_BIGENDIAN
  35     *ptr = RtlUlongByteSwap(*ptr);
  36 #endif
  37 }
  38
  39 static const struct tag_entry *first_tag( const struct profile *profile )
  40 {
  41     return (const struct tag_entry *)(profile->data + sizeof(PROFILEHEADER) + sizeof(DWORD));
  42 }
  43
  44 void get_profile_header( const struct profile *profile, PROFILEHEADER *header )
  45 {
  46     unsigned int i;
  47
  48     memcpy( header, profile->data, sizeof(PROFILEHEADER) );
  49
  50     /* ICC format is big-endian, swap bytes if necessary */
  51     for (i = 0; i < sizeof(PROFILEHEADER) / sizeof(ULONG); i++)
  52         adjust_endianness32( (ULONG *)header + i );
  53 }
  54
  55 void set_profile_header( const struct profile *profile, const PROFILEHEADER *header )
  56 {
  57     unsigned int i;
  58
  59     memcpy( profile->data, header, sizeof(PROFILEHEADER) );
  60
  61     /* ICC format is big-endian, swap bytes if necessary */
  62     for (i = 0; i < sizeof(PROFILEHEADER) / sizeof(ULONG); i++)
  63         adjust_endianness32( (ULONG *)profile->data + i );
  64 }
  65
  66 DWORD get_tag_count( const struct profile *profile )
  67 {
  68     DWORD num_tags = *(DWORD *)(profile->data + sizeof(PROFILEHEADER));
  69     adjust_endianness32( &num_tags );
  70     if ((const BYTE *)(first_tag( profile ) + num_tags) > (const BYTE *)profile->data + profile->size)
  71         return 0;
  72     return num_tags;
  73 }
  74
  75 BOOL get_tag_entry( const struct profile *profile, DWORD index, struct tag_entry *tag )
  76 {
  77     const struct tag_entry *entry = first_tag( profile );
  78
  79     if (index < 1 || index > get_tag_count( profile )) return FALSE;
  80     *tag = entry[index - 1];
  81     adjust_endianness32( &tag->sig );
  82     adjust_endianness32( &tag->offset );
  83     adjust_endianness32( &tag->size );
  84     if (tag->offset > profile->size || tag->size > profile->size - tag->offset) return FALSE;
  85     return TRUE;
  86 }
  87
  88 BOOL get_adjusted_tag( const struct profile *profile, TAGTYPE type, struct tag_entry *tag )
  89 {
  90     const struct tag_entry *entry = first_tag( profile );
  91     DWORD sig, i;
  92
  93     for (i = get_tag_count(profile); i > 0; i--, entry++)
  94     {
  95         sig = entry->sig;
  96         adjust_endianness32( &sig );
  97         if (sig == type)
  98         {
  99             *tag = *entry;
 100             adjust_endianness32( &tag->sig );
 101             adjust_endianness32( &tag->offset );
 102             adjust_endianness32( &tag->size );
 103             if (tag->offset > profile->size || tag->size > profile->size - tag->offset) return FALSE;
 104             return TRUE;
 105         }
 106     }
 107     return FALSE;
 108 }
 109
 110 static BOOL get_linked_tag( const struct profile *profile, struct tag_entry *ret )
 111 {
 112     const struct tag_entry *entry = first_tag( profile );
 113     DWORD sig, offset, size, i;
 114
 115     for (i = get_tag_count(profile); i > 0; i--, entry++)
 116     {
 117         sig = entry->sig;
 118         adjust_endianness32( &sig );
 119         if (sig == ret->sig) continue;
 120         offset = entry->offset;
 121         size = entry->size;
 122         adjust_endianness32( &offset );
 123         adjust_endianness32( &size );
 124         if (size == ret->size && offset == ret->offset)
 125         {
 126             ret->sig = sig;
 127             return TRUE;
 128         }
 129     }
 130     return FALSE;
 131 }
 132
 133 BOOL get_tag_data( const struct profile *profile, TAGTYPE type, DWORD offset, void *buffer,
 134                    DWORD *len, BOOL *linked )
 135 {
 136     struct tag_entry tag;
 137
 138     if (!get_adjusted_tag( profile, type, &tag )) return FALSE;
 139
 140     if (!buffer) offset = 0;
 141     if (offset > tag.size) return FALSE;
 142     if (*len < tag.size - offset || !buffer)
 143     {
 144         *len = tag.size - offset;
 145         return FALSE;
 146     }
 147     memcpy( buffer, profile->data + tag.offset + offset, tag.size - offset );
 148     *len = tag.size - offset;
 149     if (linked) *linked = get_linked_tag( profile, &tag );
 150     return TRUE;
 151 }
 152
 153 BOOL set_tag_data( const struct profile *profile, TAGTYPE type, DWORD offset, const void *buffer, DWORD *len )
 154 {
 155     struct tag_entry tag;
 156
 157     if (!get_adjusted_tag( profile, type, &tag )) return FALSE;
 158
 159     if (offset > tag.size) return FALSE;
 160     *len = min( tag.size - offset, *len );
 161     memcpy( profile->data + tag.offset + offset, buffer, *len );
 162     return TRUE;
 163 }