-/*
- tfm-reader.cc -- implement Tex_font_metric_reader
-
+/*
+ tfm-reader.cc -- implement Tex_font_metric_reader
+
source file of the GNU LilyPond music typesetter
-
- (c) 1999 Jan Nieuwenhuizen <janneke@gnu.org>
-
+
+ (c) 1999--2006 Jan Nieuwenhuizen <janneke@gnu.org>
+
some code shamelessly copied from GNU fontutils-0.6/tfm/tfm_input.c
- */
+*/
#include "tfm-reader.hh"
+
#include "string-convert.hh"
-#include "debug.hh"
#include "warn.hh"
-#define format_str String_convert::form_str
-#define FIX_UNITY (1 << 20)
+#define format_string String_convert::form_string
+#define FIX_UNITY \
+ (1 << 20)
static const Real fix_to_real (Fix f);
-
Tex_font_metric_reader::Tex_font_metric_reader (String name)
: input_ (name)
{
- tfm_.clear (TFM_SIZE);
-}
-Tex_font_metric
-Tex_font_metric_reader::read_tfm ()
-{
+ for (int i = 0; i < TFM_SIZE; i++)
+ ascii_to_metric_idx_.push (-1);
+
read_header ();
read_params ();
read_char_metrics ();
- return tfm_;
}
-
static const Real
fix_to_real (Fix f)
{
/* Most quantities are fixed-point fractions. */
Real
-Tex_font_metric_reader::get_U32_fix_f ()
+Tex_font_metric_reader::get_U32_fix ()
{
return fix_to_real (input_.get_U32 ());
}
/* Dimensions are a `Fix' scaled by the design size. */
Real
-Tex_font_metric_reader::get_U32_fix_scaled_f ()
+Tex_font_metric_reader::get_U32_fix_scaled ()
{
- return get_U32_fix_f () * tfm_.info_.design_size;
+ return get_U32_fix () * info_.design_size;
}
String
-Tex_font_metric_reader::get_bcpl_str ()
+Tex_font_metric_reader::get_bcpl_string ()
{
U8 length_u8 = input_.get_U8 ();
- String str = input_.get_str (length_u8);
+ String str = input_.get_string (length_u8);
return str;
}
(void) file_length;
U16 header_length = input_.get_U16 ();
- tfm_.info_.first_charcode = input_.get_U16 ();
- tfm_.info_.last_charcode = input_.get_U16 ();
+ info_.first_charcode = input_.get_U16 ();
+ info_.last_charcode = input_.get_U16 ();
U16 width_word_count = input_.get_U16 ();
U16 height_word_count = input_.get_U16 ();
U16 depth_word_count = input_.get_U16 ();
(void)kern_word_count;
U16 extensible_word_count = input_.get_U16 ();
(void)extensible_word_count;
-
- tfm_.header_.param_word_count = input_.get_U16 ();
- tfm_.info_.parameter_count = tfm_.header_.param_word_count;
-
- tfm_.header_.char_info_pos = (6 + header_length) * 4;
- tfm_.header_.width_pos = tfm_.header_.char_info_pos
- + (tfm_.info_.last_charcode
- - tfm_.info_.first_charcode + 1) * 4;
- tfm_.header_.height_pos = tfm_.header_.width_pos + width_word_count * 4;
- tfm_.header_.depth_pos = tfm_.header_.height_pos + height_word_count * 4;
- tfm_.header_.italic_correction_pos = tfm_.header_.depth_pos
- + depth_word_count * 4;
- tfm_.header_.lig_kern_pos = tfm_.header_.italic_correction_pos
+
+ header_.param_word_count = input_.get_U16 ();
+ info_.parameter_count = header_.param_word_count;
+
+ header_.char_info_pos = (6 + header_length) * 4;
+ header_.width_pos = header_.char_info_pos
+ + (info_.last_charcode
+ - info_.first_charcode + 1) * 4;
+ header_.height_pos = header_.width_pos + width_word_count * 4;
+ header_.depth_pos = header_.height_pos + height_word_count * 4;
+ header_.italic_correction_pos = header_.depth_pos
+ + depth_word_count * 4;
+ header_.lig_kern_pos = header_.italic_correction_pos
+ italic_correction_word_count * 4;
- tfm_.header_.kern_pos = tfm_.header_.lig_kern_pos + lig_kern_word_count * 4;
+ header_.kern_pos = header_.lig_kern_pos + lig_kern_word_count * 4;
/* We don't care about the extensible table. */
if (header_length < 2)
- error (_f ("TFM header of `%s' has only %u word(s)",
- input_.name_str ().ch_C (), header_length));
+ /* Not using ngettext's plural feature here, as this message is
+ more of a programming error. */
+ error (_f ("TFM header of `%s' has only %u word (s)",
+ input_.name_string ().to_str0 (), header_length));
- tfm_.info_.checksum = input_.get_U32 ();
- tfm_.info_.design_size = get_U32_fix_f ();
+ info_.checksum = input_.get_U32 ();
+ info_.design_size = get_U32_fix ();
/* Although the coding scheme might be interesting to the caller, the
font family and face byte probably aren't. So we don't read them. */
- tfm_.info_.coding_scheme = header_length > 2
- ? get_bcpl_str () : "unspecified";
-
- DOUT << format_str ("TFM checksum = %u, design_size = %fpt, coding scheme = `%s'.\n",
- tfm_.info_.checksum,
- tfm_.info_.design_size,
- tfm_.info_.coding_scheme.ch_C ());
+ info_.coding_scheme = header_length > 2
+ ? get_bcpl_string () : "unspecified";
}
/* Although TFM files are only usable by TeX if they have at least seven
Tex_font_metric_reader::read_params ()
{
/* If we have no font parameters at all, we're done. */
- if (tfm_.header_.param_word_count == 0)
+ if (header_.param_word_count == 0)
return;
//brrr
/* Move to the beginning of the parameter table in the file. */
- input_.seek_ch_C (-4 * tfm_.header_.param_word_count);
+ input_.seek_str0 (-4 * header_.param_word_count);
/* It's unlikely but possible that this TFM file has more fontdimens
than we can deal with. */
- if (tfm_.header_.param_word_count > TFM_MAX_FONTDIMENS)
+ if (header_.param_word_count > TFM_MAX_FONTDIMENS)
{
- warning (_f ("%s: TFM file has %u parameters, which is more than the
-%u I can handle",
- input_.name_str ().ch_C (),
- tfm_.header_.param_word_count,
+ warning (_f ("%s: TFM file has %u parameters, which is more than the %u I can handle",
+ input_.name_string ().to_str0 (),
+ header_.param_word_count,
TFM_MAX_FONTDIMENS));
- tfm_.header_.param_word_count = TFM_MAX_FONTDIMENS;
+ header_.param_word_count = TFM_MAX_FONTDIMENS;
}
/* The first parameter is different than all the rest, because it
isn't scaled by the design size. */
- tfm_.info_.parameters[(TFM_SLANT_PARAMETER) - 1] = get_U32_fix_f ();
-
- for (Char_code i = 2; i <= tfm_.header_.param_word_count; i++)
- tfm_.info_.parameters[i - 1] = get_U32_fix_scaled_f ();
+ info_.parameters[ (TFM_SLANT_PARAMETER) - 1] = get_U32_fix ();
-#ifdef PRINT
- for (Char_code i = 1; i <= tfm_.header_.param_word_count; i++)
- DOUT << format_str ("TFM parameter %d: %.3f", i, tfm_.info_.parameters[i - 1]);
-#endif
+ for (Char_code i = 2; i <= header_.param_word_count; i++)
+ info_.parameters[i - 1] = get_U32_fix_scaled ();
}
/* Read every character in the TFM file, storing the result in the
void
Tex_font_metric_reader::read_char_metrics ()
{
- for (int i = tfm_.info_.first_charcode; i <= tfm_.info_.last_charcode; i++)
+ for (int i = info_.first_charcode; i <= info_.last_charcode; i++)
{
Tex_font_char_metric tfm_char = read_char_metric (i);
- if (tfm_char.exists_b_)
- tfm_.ascii_to_metric_idx_[tfm_char.code_] = tfm_.char_metrics_.size ();
- tfm_.char_metrics_.push (tfm_char);
+ if (tfm_char.exists_)
+ ascii_to_metric_idx_[tfm_char.code_] = char_metrics_.size ();
+ char_metrics_.push (tfm_char);
}
}
/* If the character is outside the declared bounds in the file, don't
try to read it. */
- if (code < tfm_.info_.first_charcode || code > tfm_.info_.last_charcode)
+ if (code < info_.first_charcode || code > info_.last_charcode)
return tfm_char;
-
+
//brr
/* Move to the appropriate place in the `char_info' array. */
- input_.seek_ch_C (tfm_.header_.char_info_pos + (code - tfm_.info_.first_charcode) * 4);
+ input_.seek_str0 (header_.char_info_pos + (code - info_.first_charcode) * 4);
/* Read the character. */
tfm_char = read_char ();
- if (tfm_char.exists_b_)
+ if (tfm_char.exists_)
tfm_char.code_ = code;
return tfm_char;
}
-
/* We assume we are positioned at the beginning of a `char_info' word.
We read that word to get the indexes into the dimension tables; then
we go read the tables to get the values (if the character exists). */
Tex_font_char_metric tfm_char;
-#define GET_CHAR_DIMEN(d) \
- if (d##_index != 0) \
- { \
- input_.seek_ch_C (tfm_.header_.##d##_pos + d##_index*4); \
- tfm_char.d##_fix_ = input_.get_U32 (); \
- tfm_char.d##_ = fix_to_real (tfm_char.d##_fix_) \
- * tfm_.info_.design_size; \
- }
+#define GET_CHAR_DIMEN(d) \
+ if (d##_index != 0) \
+ { \
+ input_.seek_str0 (header_.d##_pos + d##_index * 4); \
+ tfm_char.d##_fix_ = input_.get_U32 (); \
+ tfm_char.d##_ = fix_to_real (tfm_char.d##_fix_) \
+ * info_.design_size; \
+ }
GET_CHAR_DIMEN (width);
GET_CHAR_DIMEN (height);
the first and last character codes given in the header. We've
already assumed that's true (or we couldn't be positioned at a
`char_info_word'). */
- tfm_char.exists_b_ = width_index != 0;
-
-#ifdef PRINT
- DOUT << format_str (" width = %f, height = %f, ",
- tfm_char.width_, tfm_char.height_);
- DOUT << format_str ("depth = %f, ic = %f.\n",
- tfm_char.depth, tfm_char.italic_correction);
-#endif
+ tfm_char.exists_ = width_index != 0;
if (tag == 1)
{
- input_.seek_ch_C (tfm_.header_.lig_kern_pos + remainder * 4);
- read_lig_kern_program (&tfm_char.ligature_arr_, &tfm_char.kern_arr_);
+ input_.seek_str0 (header_.lig_kern_pos + remainder * 4);
+ read_lig_kern_program (&tfm_char.ligatures_, &tfm_char.kerns_);
}
/* We don't handle the other tags. */
#define KERN_FLAG 128
void
-Tex_font_metric_reader::read_lig_kern_program (Array <Tfm_ligature>* ligature_arr_p, Array <Tfm_kern>* kern_arr_p)
+Tex_font_metric_reader::read_lig_kern_program (Array<Tfm_ligature> *ligatures, Array<Tfm_kern> *kerns)
{
bool end_b;
bool kern_step_b = input_.get_U8 () >= KERN_FLAG;
U8 remainder = input_.get_U8 ();
-#ifdef PRINT
- DOUT << format_str (" if next = %u (%c), ", next_char, next_char);
-#endif
-
if (kern_step_b)
{
Tfm_kern kern_element;
kern_element.character = next_char;
- char const* old_pos = input_.pos_ch_C ();
- input_.seek_ch_C (tfm_.header_.kern_pos + remainder * 4);
- kern_element.kern = get_U32_fix_scaled_f ();
+ char const *old_pos = input_.pos_str0 ();
+ input_.seek_str0 (header_.kern_pos + remainder * 4);
+ kern_element.kern = get_U32_fix_scaled ();
input_.set_pos (old_pos);
- kern_arr_p->push (kern_element);
-
-#ifdef PRINT
- DOUT << format_str ("kern %f.\n", kern_element.kern);
-#endif
+ kerns->push (kern_element);
}
else
{
Tfm_ligature ligature_element;
ligature_element.character = next_char;
ligature_element.ligature = remainder;
- ligature_arr_p->push (ligature_element);
-
-#ifdef PRINT
- DOUT format_str ("ligature %d (hex %x).\n",
- ligature_element.ligature,
- ligature_element.ligature);
-#endif
+ ligatures->push (ligature_element);
}
- } while (!end_b);
+ }
+ while (!end_b);
}
projects / lilypond.git / blobdiff