thirdparty/freetype-2.3.12/src/base/ftmm.c

   1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  ftmm.c                                                                 */
   4 /*                                                                         */
   5 /*    Multiple Master font support (body).                                 */
   6 /*                                                                         */
   7 /*  Copyright 1996-2001, 2003, 2004, 2009 by                               */
   8 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
   9 /*                                                                         */
  10 /*  This file is part of the FreeType project, and may only be used,       */
  11 /*  modified, and distributed under the terms of the FreeType project      */
  12 /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
  13 /*  this file you indicate that you have read the license and              */
  14 /*  understand and accept it fully.                                        */
  15 /*                                                                         */
  16 /***************************************************************************/
  17
  18
  19 #include <ft2build.h>
  20 #include FT_MULTIPLE_MASTERS_H
  21 #include FT_INTERNAL_OBJECTS_H
  22 #include FT_SERVICE_MULTIPLE_MASTERS_H
  23
  24
  25   /*************************************************************************/
  26   /*                                                                       */
  27   /* The macro FT_COMPONENT is used in trace mode.  It is an implicit      */
  28   /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log  */
  29   /* messages during execution.                                            */
  30   /*                                                                       */
  31 #undef  FT_COMPONENT
  32 #define FT_COMPONENT  trace_mm
  33
  34
  35   static FT_Error
  36   ft_face_get_mm_service( FT_Face                   face,
  37                           FT_Service_MultiMasters  *aservice )
  38   {
  39     FT_Error  error;
  40
  41
  42     *aservice = NULL;
  43
  44     if ( !face )
  45       return FT_Err_Invalid_Face_Handle;
  46
  47     error = FT_Err_Invalid_Argument;
  48
  49     if ( FT_HAS_MULTIPLE_MASTERS( face ) )
  50     {
  51       FT_FACE_LOOKUP_SERVICE( face,
  52                               *aservice,
  53                               MULTI_MASTERS );
  54
  55       if ( *aservice )
  56         error = FT_Err_Ok;
  57     }
  58
  59     return error;
  60   }
  61
  62
  63   /* documentation is in ftmm.h */
  64
  65   FT_EXPORT_DEF( FT_Error )
  66   FT_Get_Multi_Master( FT_Face           face,
  67                        FT_Multi_Master  *amaster )
  68   {
  69     FT_Error                 error;
  70     FT_Service_MultiMasters  service;
  71
  72
  73     error = ft_face_get_mm_service( face, &service );
  74     if ( !error )
  75     {
  76       error = FT_Err_Invalid_Argument;
  77       if ( service->get_mm )
  78         error = service->get_mm( face, amaster );
  79     }
  80
  81     return error;
  82   }
  83
  84
  85   /* documentation is in ftmm.h */
  86
  87   FT_EXPORT_DEF( FT_Error )
  88   FT_Get_MM_Var( FT_Face      face,
  89                  FT_MM_Var*  *amaster )
  90   {
  91     FT_Error                 error;
  92     FT_Service_MultiMasters  service;
  93
  94
  95     error = ft_face_get_mm_service( face, &service );
  96     if ( !error )
  97     {
  98       error = FT_Err_Invalid_Argument;
  99       if ( service->get_mm_var )
 100         error = service->get_mm_var( face, amaster );
 101     }
 102
 103     return error;
 104   }
 105
 106
 107   /* documentation is in ftmm.h */
 108
 109   FT_EXPORT_DEF( FT_Error )
 110   FT_Set_MM_Design_Coordinates( FT_Face   face,
 111                                 FT_UInt   num_coords,
 112                                 FT_Long*  coords )
 113   {
 114     FT_Error                 error;
 115     FT_Service_MultiMasters  service;
 116
 117
 118     error = ft_face_get_mm_service( face, &service );
 119     if ( !error )
 120     {
 121       error = FT_Err_Invalid_Argument;
 122       if ( service->set_mm_design )
 123         error = service->set_mm_design( face, num_coords, coords );
 124     }
 125
 126     return error;
 127   }
 128
 129
 130   /* documentation is in ftmm.h */
 131
 132   FT_EXPORT_DEF( FT_Error )
 133   FT_Set_Var_Design_Coordinates( FT_Face    face,
 134                                  FT_UInt    num_coords,
 135                                  FT_Fixed*  coords )
 136   {
 137     FT_Error                 error;
 138     FT_Service_MultiMasters  service;
 139
 140
 141     error = ft_face_get_mm_service( face, &service );
 142     if ( !error )
 143     {
 144       error = FT_Err_Invalid_Argument;
 145       if ( service->set_var_design )
 146         error = service->set_var_design( face, num_coords, coords );
 147     }
 148
 149     return error;
 150   }
 151
 152
 153   /* documentation is in ftmm.h */
 154
 155   FT_EXPORT_DEF( FT_Error )
 156   FT_Set_MM_Blend_Coordinates( FT_Face    face,
 157                                FT_UInt    num_coords,
 158                                FT_Fixed*  coords )
 159   {
 160     FT_Error                 error;
 161     FT_Service_MultiMasters  service;
 162
 163
 164     error = ft_face_get_mm_service( face, &service );
 165     if ( !error )
 166     {
 167       error = FT_Err_Invalid_Argument;
 168       if ( service->set_mm_blend )
 169          error = service->set_mm_blend( face, num_coords, coords );
 170     }
 171
 172     return error;
 173   }
 174
 175
 176   /* documentation is in ftmm.h */
 177
 178   /* This is exactly the same as the previous function.  It exists for */
 179   /* orthogonality.                                                    */
 180
 181   FT_EXPORT_DEF( FT_Error )
 182   FT_Set_Var_Blend_Coordinates( FT_Face    face,
 183                                 FT_UInt    num_coords,
 184                                 FT_Fixed*  coords )
 185   {
 186     FT_Error                 error;
 187     FT_Service_MultiMasters  service;
 188
 189
 190     error = ft_face_get_mm_service( face, &service );
 191     if ( !error )
 192     {
 193       error = FT_Err_Invalid_Argument;
 194       if ( service->set_mm_blend )
 195          error = service->set_mm_blend( face, num_coords, coords );
 196     }
 197
 198     return error;
 199   }
 200
 201
 202 /* END */