X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;ds=sidebyside;f=lily%2Ffont-metric.cc;h=64224c48ea3854645df259bd855624f04eb2472f;hb=48eb640005f5abb84b3d6f8db2e1704d4bff7645;hp=ef615ae0a9f7e73f3b813b3816a195f71a9be66a;hpb=ffe548cfbb3c3b37c8969f49b5aba04ef998d080;p=lilypond.git diff --git a/lily/font-metric.cc b/lily/font-metric.cc index ef615ae0a9..64224c48ea 100644 --- a/lily/font-metric.cc +++ b/lily/font-metric.cc @@ -1,71 +1,59 @@ /* - font-metric.cc -- implement Font_metric + font-metric.cc -- implement Font_metric source file of the GNU LilyPond music typesetter - (c) 1999 Han-Wen Nienhuys - - */ + (c) 1999--2004 Han-Wen Nienhuys + + Mats Bengtsson (the ugly TeX parsing in text_dimension) +*/ #include #include +#include "modified-font-metric.hh" +#include "virtual-methods.hh" +#include "warn.hh" +#include "stencil.hh" #include "ly-smobs.icc" #include "font-metric.hh" +#include "string.hh" -Box -Font_metric::text_dimension (String text) const +Real +Font_metric::design_size () const { - Interval ydims; - Real w=0.0; - - for (int i = 0; i < text.length_i (); i++) - { - - if (text[i]=='\\') - { - for (i++; (i < text.length_i ()) && isalpha(text[i]); i++) - ; - // ugh. - i--; // Compensate for the increment in the outer loop! - } - else - { - Box b = get_char ((unsigned char)text[i],false); - - // Ugh, use the width of 'x' for unknown characters - if (b[X_AXIS].length () == 0) - b = get_char ((unsigned char)'x',false); - - w += b[X_AXIS].length (); - ydims.unite (b[Y_AXIS]); - } - } - if (ydims.empty_b ()) - ydims = Interval (0,0); - - return Box(Interval (0, w), ydims); + return 1.0; } - -Box -Scaled_font_metric::text_dimension (String t) const +String +Font_metric::coding_scheme () const { - Real realmag = pow (1.2, magstep_i_); - Box b (orig_l_->text_dimension (t)); - - return Box(b[X_AXIS]* realmag, b[Y_AXIS]*realmag); + return "FontSpecific"; } -Font_metric::~Font_metric () +Stencil +Font_metric::find_by_name (String s) const { - unsmobify_self (); + int idx = name_to_index (s); + Box b; + + SCM expr = SCM_EOL; + if (idx >= 0) + { + expr = scm_list_3 (ly_symbol2scm ("char"), + self_scm (), + scm_int2num (index_to_ascii (idx))); + b = get_indexed_char (idx); + } + + Stencil q (b, expr); + return q; } Font_metric::Font_metric () { + description_ = SCM_EOL; self_scm_ = SCM_EOL; - name_ = SCM_EOL; smobify_self (); } @@ -74,57 +62,217 @@ Font_metric::Font_metric (Font_metric const &) } - -Box -Font_metric::get_char (int, bool)const +Font_metric::~Font_metric () { - return Box (Interval(0,0),Interval (0,0)); } -Scaled_font_metric::Scaled_font_metric (Font_metric* m, int s) +int +Font_metric::count () const { - magstep_i_ = s; - orig_l_ = m; + return 0; } -SCM -Font_metric::description () const +Box +Font_metric::get_ascii_char (int) const { - return gh_cons (name_, gh_int2scm (0)); + return Box (Interval (0, 0), Interval (0, 0)); } +Box +Font_metric::get_indexed_char (int k) const +{ + return get_ascii_char (k); +} -SCM -Scaled_font_metric::description () const +int +Font_metric::name_to_index (String) const { - SCM od = orig_l_->description (); - gh_set_cdr_x (od, gh_int2scm (magstep_i_)); - return od; + return -1; } +Offset +Font_metric::get_indexed_wxwy (int) const +{ + return Offset (0, 0); +} void -Font_metric::do_smobify_self () +Font_metric::derived_mark () const { } SCM Font_metric::mark_smob (SCM s) { - Font_metric * m = SMOB_TO_TYPE(Font_metric, s); - return m->name_; + Font_metric *m = (Font_metric*) SCM_CELL_WORD_1 (s); + m->derived_mark (); + return m->description_; } int -Font_metric::print_smob (SCM s, SCM port, scm_print_state * ) +Font_metric::print_smob (SCM s, SCM port, scm_print_state *) { Font_metric *m = unsmob_metrics (s); - scm_puts ("#name_, port); + scm_puts ("#<", port); + scm_puts (classname (m), port); + scm_puts (" ", port); + scm_write (m->description_, port); scm_puts (">", port); return 1; } -IMPLEMENT_UNSMOB(Font_metric, metrics); -IMPLEMENT_SMOBS(Font_metric); + +IMPLEMENT_SMOBS (Font_metric); +IMPLEMENT_DEFAULT_EQUAL_P (Font_metric); +IMPLEMENT_TYPE_P (Font_metric, "ly:font-metric?"); + + +LY_DEFINE (ly_find_glyph_by_name, "ly:find-glyph-by-name", + 2, 0, 0, + (SCM font, SCM name), + "This function retrieves a Stencil for the glyph named @var{name} " + "in " + "@var{font}. " + "The font must be available as an AFM file. If the glyph " + "is not found, @code{#f} is returned. ") +{ + Font_metric *fm = unsmob_metrics (font); + SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric"); + SCM_ASSERT_TYPE (scm_is_string (name), name, SCM_ARG2, __FUNCTION__, "string"); + + Stencil m = fm->find_by_name (ly_scm2string (name)); + + /* TODO: make optional argument for default if not found. */ + return m.smobbed_copy (); +} + +LY_DEFINE (ly_get_glyph, "ly:get-glyph", + 2, 0, 0, + (SCM font, SCM index), + "Retrieve a Stencil for the glyph numbered @var{index} " + "in @var{font}.") +{ + Font_metric *fm = unsmob_metrics (font); + SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric"); + SCM_ASSERT_TYPE (scm_is_number (index), index, SCM_ARG2, __FUNCTION__, "number"); + + return fm->get_ascii_char_stencil (scm_to_int (index)).smobbed_copy (); +} + +LY_DEFINE (ly_text_dimension,"ly:text-dimension", + 2, 0, 0, + (SCM font, SCM text), + "Given the font metric in @var{font} and the string @var{text}, " + "compute the extents of that text in that font. " + "The return value is a pair of number-pairs.") +{ + Box b; + Modified_font_metric*fm = dynamic_cast + (unsmob_metrics (font)); + SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "modified font metric"); + SCM_ASSERT_TYPE (scm_is_string (text), text, SCM_ARG2, __FUNCTION__, "string"); + + b = fm->text_dimension (ly_scm2string (text)); + + return scm_cons (ly_interval2scm (b[X_AXIS]), ly_interval2scm (b[Y_AXIS])); +} + +LY_DEFINE (ly_font_filename,"ly:font-filename", + 1, 0, 0, + (SCM font), + "Given the font metric @var{font}, " + "return the corresponding file name.") +{ + Font_metric *fm = unsmob_metrics (font); + SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric"); + return scm_car (fm->description_); +} + + +#include "afm.hh" + +LY_DEFINE (ly_font_name,"ly:font-name", + 1, 0, 0, + (SCM font), + "Given the font metric @var{font}, " + "return the corresponding name.") +{ + Font_metric *fm = unsmob_metrics (font); + + SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric"); + + + if (Modified_font_metric* mfm = dynamic_cast (fm)) + return ly_font_name (mfm->original_font ()->self_scm ()); + else if (Adobe_font_metric* afm = dynamic_cast (fm)) + { + return scm_makfrom0str (afm->font_info_->gfi->fontName); + } + else + return SCM_BOOL_F; +} + + + +LY_DEFINE (ly_font_magnification,"ly:font-magnification", 1 , 0, 0, + (SCM font), + "Given the font metric @var{font}, return the " + "magnification, relative to the current outputscale.") +{ + Font_metric *fm = unsmob_metrics (font); + SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric"); + return scm_cdr (fm->description_); +} + +LY_DEFINE (ly_font_design_size,"ly:font-design-size", 1 , 0, 0, + (SCM font), + "Given the font metric @var{font}, return the " + "design size, relative to the current outputscale.") +{ + Font_metric *fm = unsmob_metrics (font); + SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric"); + return scm_make_real (fm->design_size ()); +} + + + +int +Font_metric::index_to_ascii (int i) const +{ + return i; +} + +Stencil +Font_metric::get_ascii_char_stencil (int code) const +{ + SCM at = scm_list_3 (ly_symbol2scm ("char"), + this->self_scm (), + scm_int2num (code)); + Box b = get_ascii_char (code); + return Stencil (b, at); +} + +Stencil +Font_metric::get_indexed_char_stencil (int code) const +{ + SCM at = scm_list_3 (ly_symbol2scm ("char"), + self_scm (), + scm_int2num (code)); + Box b = get_indexed_char (code); + return Stencil (b, at); +} + +int +/*Font_metric::*/ +get_encoded_index (Font_metric *m, String input_coding, int code) +{ + String font_coding = m->coding_scheme (); + if (font_coding == input_coding) + return code; + SCM s = scm_call_3 (ly_scheme_function ("encoded-index"), + scm_makfrom0str (input_coding.to_str0 ()), + scm_makfrom0str (font_coding.to_str0 ()), + scm_int2num (code)); + return scm_to_int (s); +}