workbench/libs/diskfont/opendiskfont.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Diskfont function OpenDiskFont()
   6     Lang: english
   7 */
   8
   9 #include <string.h>
  10 #include <graphics/text.h>
  11 #include <proto/dos.h>
  12 #include <proto/utility.h>
  13 #include <proto/graphics.h>
  14 #include "diskfont_intern.h"
  15
  16 #include <aros/debug.h>
  17
  18
  19 /*****************************************************************************
  20
  21     NAME */
  22 #include <clib/diskfont_protos.h>
  23
  24         AROS_LH1(struct TextFont *, OpenDiskFont,
  25
  26 /*  SYNOPSIS */
  27         AROS_LHA(struct TextAttr *, textAttr, A0),
  28
  29 /*  LOCATION */
  30         struct Library *, DiskfontBase, 5, Diskfont)
  31
  32 /*  FUNCTION
  33                 Tries to open the font specified by textAttr. If the font has allready
  34                 been loaded into memory, it will be opened with OpenFont(). Otherwise
  35                 OpenDiskFont() will try to load it from disk.
  36
  37     INPUTS
  38         textAttr - Description of the font to load. If the textAttr->ta_Style
  39                            FSF_TAGGED bit is set, it will be treated as a struct TTextAttr.
  40
  41
  42     RESULT
  43         Pointer to a struct TextFont on success, 0 on failure.
  44
  45     NOTES
  46
  47     EXAMPLE
  48
  49     BUGS
  50
  51     SEE ALSO
  52         AvailFonts()
  53
  54     INTERNALS
  55         Internally now the WeighTAMatch function is used to find the best
  56         font match. In OS 3.0 and above this graphics function is made
  57         private to the library. So in the future maybe this function can
  58         be replaced by a more flexible internal mechanism.
  59
  60 *****************************************************************************/
  61 {
  62     AROS_LIBFUNC_INIT
  63
  64     WORD match_weight = 0, new_match_weight;
  65     APTR iterator;
  66     BOOL bestinmemory = TRUE;
  67     struct TTextAttr *ttait;
  68     struct TextFont *tf = NULL;
  69     STRPTR filepart = FilePart(textAttr->ta_Name), wholename = textAttr->ta_Name;
  70     ULONG len = strlen(filepart);
  71
  72     if (len>5 && strcasecmp(filepart+len-5,".font")==0)
  73         len -= 5;
  74
  75     D(bug("OpenDiskFont(textAttr=%p)\n", textAttr));
  76     D(bug("Name %s YSize %ld Style 0x%lx Flags 0x%lx\n",
  77           textAttr->ta_Name,
  78           textAttr->ta_YSize,
  79           textAttr->ta_Style,
  80           textAttr->ta_Flags));
  81
  82     /* Check if font is in memory, ignore path */
  83     textAttr->ta_Name = filepart;
  84
  85     tf = OpenFont(textAttr);
  86     if (tf!=NULL)
  87     {
  88         struct TTextAttr tattr;
  89
  90         tattr.tta_Name = tf->tf_Message.mn_Node.ln_Name;
  91         tattr.tta_YSize = tf->tf_YSize;
  92         tattr.tta_Style = tf->tf_Style;
  93         tattr.tta_Flags = tf->tf_Flags;
  94         if (ExtendFont(tf, NULL))
  95         {
  96             tattr.tta_Tags = TFE(tf->tf_Extension)->tfe_Tags;
  97             if (tattr.tta_Tags) tattr.tta_Style |= FSF_TAGGED;
  98         }
  99         else
 100             tattr.tta_Tags = NULL;
 101
 102         match_weight = WeighTAMatch(textAttr,
 103                                     (struct TextAttr *)&tattr,
 104                                     tattr.tta_Tags);
 105
 106         D(bug("OpenDiskFont: Found font in memory weight(%d)\n", match_weight));
 107     }
 108     else
 109         D(bug("OpenDiskFont: No font found in memory\n"));
 110
 111     textAttr->ta_Name = wholename;
 112
 113     if (match_weight!=MAXFONTMATCHWEIGHT)
 114     {
 115         iterator = DF_IteratorInit((struct TTextAttr *)textAttr, DFB(DiskfontBase));
 116         if (iterator == NULL)
 117             D(bug("OpenDiskFont: Error initializing Diskfont Iterator\n"));
 118         else
 119         {
 120             while ((ttait = DF_IteratorGetNext(iterator, DFB(DiskfontBase)))!=NULL)
 121             {
 122                 ULONG len2 = strlen(ttait->tta_Name) - 5;
 123
 124                 D(bug("OpenDiskFont: Checking font: %s(%d)\n", ttait->tta_Name, ttait->tta_YSize));
 125
 126                 D(bug("len: %d len2: %d\n", len, len2));
 127
 128                 if ((len == len2)  && (strncasecmp(ttait->tta_Name, filepart, len) == 0))
 129                 {
 130                     new_match_weight = WeighTAMatch(textAttr,
 131                                                     (struct TextAttr *)ttait,
 132                                                     ttait->tta_Tags);
 133
 134                     if (new_match_weight > match_weight)
 135                     {
 136                         match_weight = new_match_weight;
 137                         DF_IteratorRemember(iterator, DFB(DiskfontBase));
 138                         bestinmemory = FALSE;
 139                         D(bug("Better weight (%d)\n", match_weight));
 140                     }
 141                     else
 142                         D(bug("No better weight (%d)\n", new_match_weight));
 143
 144                     if (match_weight==MAXFONTMATCHWEIGHT)
 145                         break;
 146                 }
 147             }
 148
 149             /* Best still in memory then open this font, otherwise load from disk */
 150             if (!bestinmemory)
 151             {
 152                 if (tf!=NULL)
 153                     CloseFont(tf);
 154                 tf = DF_IteratorRememberOpen(iterator, DFB(DiskfontBase));
 155             }
 156             DF_IteratorFree(iterator, DFB(DiskfontBase));
 157         }
 158     }
 159
 160     if (tf)
 161     {
 162         D(bug("extend font\n"));
 163         if (ExtendFont(tf, NULL))
 164         {
 165             /* FIXME: Check if this is correct for this case */
 166             TFE(tf->tf_Extension)->tfe_Flags0 |= TE0F_NOREMFONT;
 167         }
 168     }
 169
 170     ReturnPtr("OpenDiskFont", struct TextFont *, tf);
 171
 172     AROS_LIBFUNC_EXIT
 173
 174 } /* OpenDiskFont */