1 /***************************************************************************/
   2 /*                                                                         */
   3 /*  ftspic.c                                                               */
   4 /*                                                                         */
   5 /*    The FreeType position independent code services for smooth module.   */
   6 /*                                                                         */
   7 /*  Copyright 2009-2018 by                                                 */
   8 /*  Oran Agra and Mickey Gabel.                                            */
   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_FREETYPE_H
  21 #include FT_INTERNAL_OBJECTS_H
  22 #include "ftspic.h"
  23 #include "ftsmerrs.h"
  24 
  25 
  26 #ifdef FT_CONFIG_OPTION_PIC
  27 
  28   /* forward declaration of PIC init functions from ftgrays.c */
  29   void
  30   FT_Init_Class_ft_grays_raster( FT_Raster_Funcs*  funcs );
  31 
  32 
  33   void
  34   ft_smooth_renderer_class_pic_free( FT_Library  library )
  35   {
  36     FT_PIC_Container*  pic_container = &library->pic_container;
  37     FT_Memory          memory        = library->memory;
  38 
  39 
  40     if ( pic_container->smooth )
  41     {
  42       SmoothPIC*  container = (SmoothPIC*)pic_container->smooth;
  43 
  44 
  45       if ( --container->ref_count )
  46         return;
  47 
  48       FT_FREE( container );
  49       pic_container->smooth = NULL;
  50     }
  51   }
  52 
  53 
  54   FT_Error
  55   ft_smooth_renderer_class_pic_init( FT_Library  library )
  56   {
  57     FT_PIC_Container*  pic_container = &library->pic_container;
  58     FT_Error           error         = FT_Err_Ok;
  59     SmoothPIC*         container     = NULL;
  60     FT_Memory          memory        = library->memory;
  61 
  62 
  63     /* since this function also serve smooth_lcd and smooth_lcdv renderers,
  64        it implements reference counting */
  65     if ( pic_container->smooth )
  66     {
  67       ((SmoothPIC*)pic_container->smooth)->ref_count++;
  68       return error;
  69     }
  70 
  71     /* allocate pointer, clear and set global container pointer */
  72     if ( FT_ALLOC( container, sizeof ( *container ) ) )
  73       return error;
  74     FT_MEM_SET( container, 0, sizeof ( *container ) );
  75     pic_container->smooth = container;
  76 
  77     container->ref_count = 1;
  78 
  79     /* initialize pointer table -                       */
  80     /* this is how the module usually expects this data */
  81     FT_Init_Class_ft_grays_raster( &container->ft_grays_raster );
  82 
  83     return error;
  84   }
  85 
  86 
  87   /* re-route these init and free functions to the above functions */
  88   FT_Error
  89   ft_smooth_lcd_renderer_class_pic_init( FT_Library  library )
  90   {
  91     return ft_smooth_renderer_class_pic_init( library );
  92   }
  93 
  94 
  95   void
  96   ft_smooth_lcd_renderer_class_pic_free( FT_Library  library )
  97   {
  98     ft_smooth_renderer_class_pic_free( library );
  99   }
 100 
 101 
 102   FT_Error
 103   ft_smooth_lcdv_renderer_class_pic_init( FT_Library  library )
 104   {
 105     return ft_smooth_renderer_class_pic_init( library );
 106   }
 107 
 108 
 109   void
 110   ft_smooth_lcdv_renderer_class_pic_free( FT_Library  library )
 111   {
 112     ft_smooth_renderer_class_pic_free( library );
 113   }
 114 
 115 #endif /* FT_CONFIG_OPTION_PIC */
 116 
 117 
 118 /* END */