pstoraster/gsfont0.c

   1 /* Copyright (C) 1994, 1996, 1997 Aladdin Enterprises.  All rights reserved.
   2
   3   This file is part of GNU Ghostscript.
   4
   5   GNU Ghostscript is distributed in the hope that it will be useful, but
   6   WITHOUT ANY WARRANTY.  No author or distributor accepts responsibility
   7   to anyone for the consequences of using it or for whether it serves any
   8   particular purpose or works at all, unless he says so in writing.  Refer
   9   to the GNU General Public License for full details.
  10
  11   Everyone is granted permission to copy, modify and redistribute GNU
  12   Ghostscript, but only under the conditions described in the GNU General
  13   Public License.  A copy of this license is supposed to have been given
  14   to you along with GNU Ghostscript so you can know your rights and
  15   responsibilities.  It should be in a file named COPYING.  Among other
  16   things, the copyright notice and this notice must be preserved on all
  17   copies.
  18
  19   Aladdin Enterprises supports the work of the GNU Project, but is not
  20   affiliated with the Free Software Foundation or the GNU Project.  GNU
  21   Ghostscript, as distributed by Aladdin Enterprises, does not require any
  22   GNU software to build or run it.
  23 */
  24
  25 /*$Id$ */
  26 /* Composite font operations for Ghostscript library */
  27 #include "memory_.h"
  28 #include "gx.h"
  29 #include "gserrors.h"
  30 #include "gsstruct.h"
  31 #include "gxfixed.h"
  32 #include "gsmatrix.h"
  33 #include "gxdevice.h"
  34 #include "gxdevmem.h"
  35 #include "gxchar.h"
  36 #include "gxfcache.h"           /* gs_font_dir */
  37 #include "gxfont.h"
  38 #include "gxfont0.h"
  39
  40 /* Structure descriptor */
  41 private struct_proc_enum_ptrs(font_type0_enum_ptrs);
  42 private struct_proc_reloc_ptrs(font_type0_reloc_ptrs);
  43
  44 public_st_gs_font_type0();
  45 #define pfont ((gs_font_type0 *)vptr)
  46 private
  47 ENUM_PTRS_BEGIN(font_type0_enum_ptrs) ENUM_PREFIX(st_gs_font, gs_type0_data_max_ptrs);
  48
  49 ENUM_PTR(0, gs_font_type0, data.Encoding);
  50 ENUM_PTR(1, gs_font_type0, data.FDepVector);
  51 case 2:
  52 switch (pfont->data.FMapType)
  53 {
  54     case fmap_SubsVector:
  55 ENUM_RETURN_CONST_STRING_PTR(gs_font_type0,
  56                              data.SubsVector);
  57     case fmap_CMap:
  58 ENUM_RETURN_PTR(gs_font_type0, data.CMap);
  59     default:
  60 ENUM_RETURN(0);
  61 }
  62 ENUM_PTRS_END
  63 private RELOC_PTRS_BEGIN(font_type0_reloc_ptrs) RELOC_PREFIX(st_gs_font);
  64 RELOC_PTR(gs_font_type0, data.Encoding);
  65 RELOC_PTR(gs_font_type0, data.FDepVector);
  66 switch (pfont->data.FMapType)
  67 {
  68     case fmap_SubsVector:
  69 RELOC_CONST_STRING_PTR(gs_font_type0, data.SubsVector);
  70 break;
  71     case fmap_CMap:
  72 RELOC_PTR(gs_font_type0, data.CMap);
  73 break;
  74     default:
  75 ;
  76 }
  77 RELOC_PTRS_END
  78 #undef pfont
  79
  80 /* Adjust a composite font by concatenating a given matrix */
  81 /* to the FontMatrix of all descendant composite fonts. */
  82 private int
  83 gs_type0_adjust_matrix(gs_font_dir * pdir, gs_font_type0 * pfont,
  84                        const gs_matrix * pmat)
  85 {
  86     gs_font **pdep = pfont->data.FDepVector;
  87     uint fdep_size = pfont->data.fdep_size;
  88     gs_font **ptdep;
  89     uint i;
  90
  91     /* Check for any descendant composite fonts. */
  92     for (i = 0; i < fdep_size; i++)
  93         if (pdep[i]->FontType == ft_composite)
  94             break;
  95     if (i == fdep_size)
  96         return 0;
  97     ptdep = gs_alloc_struct_array(pfont->memory, fdep_size, gs_font *,
  98                                   &st_gs_font_ptr_element,
  99                                   "gs_type0_adjust_font(FDepVector)");
 100     if (ptdep == 0)
 101         return_error(gs_error_VMerror);
 102     memcpy(ptdep, pdep, sizeof(gs_font *) * fdep_size);
 103     for (; i < fdep_size; i++)
 104         if (pdep[i]->FontType == ft_composite) {
 105             int code = gs_makefont(pdir, pdep[i], pmat, &ptdep[i]);
 106
 107             if (code < 0)
 108                 return code;
 109         }
 110     pfont->data.FDepVector = ptdep;
 111     return 0;
 112 }
 113
 114 /* Finish defining a composite font, */
 115 /* by adjusting its descendants' FontMatrices. */
 116 int
 117 gs_type0_define_font(gs_font_dir * pdir, gs_font * pfont)
 118 {
 119     const gs_matrix *pmat = &pfont->FontMatrix;
 120
 121     /* Check for the identity matrix, which is common in root fonts. */
 122     if (pmat->xx == 1.0 && pmat->yy == 1.0 &&
 123         pmat->xy == 0.0 && pmat->yx == 0.0 &&
 124         pmat->tx == 0.0 && pmat->ty == 0.0
 125         )
 126         return 0;
 127     return gs_type0_adjust_matrix(pdir, (gs_font_type0 *) pfont, pmat);
 128 }
 129
 130 /* Finish scaling a composite font similarly. */
 131 int
 132 gs_type0_make_font(gs_font_dir * pdir, const gs_font * pfont,
 133                    const gs_matrix * pmat, gs_font ** ppfont)
 134 {
 135     return gs_type0_adjust_matrix(pdir, (gs_font_type0 *) * ppfont, pmat);
 136 }