*** empty log message ***
This commit is contained in:
David Rose
parent
4963958659
commit
5e4835f8b6
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@ -14,7 +14,11 @@
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charBitmap.I charBitmap.cxx charBitmap.h \
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charLayout.cxx charLayout.h \
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charPlacement.I charPlacement.cxx charPlacement.h \
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eggMakeFont.cxx eggMakeFont.h
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eggMakeFont.cxx eggMakeFont.h \
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fontFile.I fontFile.cxx fontFile.h \
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pkFontFile.cxx pkFontFile.h
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#end bin_target
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#define INSTALL_SCRIPTS ttf2egg
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#define INSTALL_DATA T1-WGL4.enc
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@ -0,0 +1,128 @@
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% T1-WGL4.enc
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%
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%
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% This is LaTeX T1 encoding for WGL4 encoded TrueType fonts
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% (e.g. from Windows 95)
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%
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%
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% Note that /hyphen appears twice (for the T1 code points `hyphen' 0x2d
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% and `hyphenchar' 0x7f).
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%
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%
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% LIGKERN space l =: lslash ;
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% LIGKERN space L =: Lslash ;
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% LIGKERN question quoteleft =: questiondown ;
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% LIGKERN exclam quoteleft =: exclamdown ;
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% LIGKERN hyphen hyphen =: endash ;
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% LIGKERN endash hyphen =: emdash ;
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% LIGKERN quoteleft quoteleft =: quotedblleft ;
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% LIGKERN quoteright quoteright =: quotedblright ;
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% LIGKERN comma comma =: quotedblbase ;
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% LIGKERN less less =: guillemotleft ;
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% LIGKERN greater greater =: guillemotright ;
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%
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% LIGKERN f i =: fi ;
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% LIGKERN f l =: fl ;
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% LIGKERN f f =: ff ;
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% LIGKERN ff i =: ffi ;
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% LIGKERN ff l =: ffl ;
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%
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% We blow away kerns to and from spaces (TeX doesn't have a
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% space) and also remove any kerns from the numbers.
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%
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% LIGKERN space {} * ; * {} space ;
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% LIGKERN zero {} * ; * {} zero ;
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% LIGKERN one {} * ; * {} one ;
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% LIGKERN two {} * ; * {} two ;
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% LIGKERN three {} * ; * {} three ;
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% LIGKERN four {} * ; * {} four ;
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% LIGKERN five {} * ; * {} five ;
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% LIGKERN six {} * ; * {} six ;
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% LIGKERN seven {} * ; * {} seven ;
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% LIGKERN eight {} * ; * {} eight ;
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% LIGKERN nine {} * ; * {} nine ;
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/T1Encoding [ % now 256 chars follow
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% 0x00
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/grave /acute /circumflex /tilde
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/dieresis /hungarumlaut /ring /caron
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/breve /macron /dotaccent /cedilla
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/ogonek /quotesinglbase /guilsinglleft /guilsinglright
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% 0x10
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/quotedblleft /quotedblright /quotedblbase /guillemotleft
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/guillemotright /endash /emdash /compwordmark
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/perthousandzero /dotlessi /dotlessj /ff
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/fi /fl /ffi /ffl
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% 0x20
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/visualspace /exclam /quotedbl /numbersign
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/dollar /percent /ampersand /quoteright
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/parenleft /parenright /asterisk /plus
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/comma /hyphen /period /slash
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% 0x30
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/zero /one /two /three
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/four /five /six /seven
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/eight /nine /colon /semicolon
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/less /equal /greater /question
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% 0x40
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/at /A /B /C
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/D /E /F /G
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/H /I /J /K
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/L /M /N /O
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% 0x50
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/P /Q /R /S
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/T /U /V /W
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/X /Y /Z /bracketleft
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/backslash /bracketright /asciicircum /underscore
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% 0x60
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/quoteleft /a /b /c
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/d /e /f /g
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/h /i /j /k
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/l /m /n /o
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% 0x70
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/p /q /r /s
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/t /u /v /w
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/x /y /z /braceleft
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/bar /braceright /asciitilde /hyphen
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% 0x80
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/Abreve /Aogonek /Cacute /Ccaron
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/Dcaron /Ecaron /Eogonek /Gbreve
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/Lacute /Lcaron /Lslash /Nacute
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/Ncaron /Eng /Odblacute /Racute
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% 0x90
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/Rcaron /Sacute /Scaron /Scedilla
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/Tcaron /Tcedilla /Udblacute /Uring
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/Ydieresis /Zacute /Zcaron /Zdot
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/IJ /Idot /dmacron /section
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% 0xA0
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/abreve /aogonek /cacute /ccaron
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/dcaron /ecaron /eogonek /gbreve
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/lacute /lcaron /lslash /nacute
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/ncaron /eng /odblacute /racute
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% 0xB0
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/rcaron /sacute /scaron /scedilla
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/tcaron /tcedilla /udblacute /uring
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/ydieresis /zacute /zcaron /zdot
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/ij /exclamdown /questiondown /sterling
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% 0xC0
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/Agrave /Aacute /Acircumflex /Atilde
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/Adieresis /Aring /AE /Ccedilla
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/Egrave /Eacute /Ecircumflex /Edieresis
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/Igrave /Iacute /Icircumflex /Idieresis
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% 0xD0
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/Eth /Ntilde /Ograve /Oacute
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/Ocircumflex /Otilde /Odieresis /OE
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/Oslash /Ugrave /Uacute /Ucircumflex
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/Udieresis /Yacute /Thorn /Germandbls
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% 0xE0
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/agrave /aacute /acircumflex /atilde
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/adieresis /aring /ae /ccedilla
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/egrave /eacute /ecircumflex /edieresis
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/igrave /iacute /icircumflex /idieresis
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% 0xF0
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/eth /ntilde /ograve /oacute
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/ocircumflex /otilde /odieresis /oe
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/oslash /ugrave /uacute /ucircumflex
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/udieresis /yacute /thorn /germandbls
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] def
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% eof
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@ -23,14 +23,3 @@ INLINE int CharBitmap::
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get_height() const {
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return _block.size();
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}
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////////////////////////////////////////////////////////////////////
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// Function: SortCharBitmap::Function Operator
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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INLINE bool SortCharBitmap::
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operator() (const CharBitmap *c1, const CharBitmap *c2) const {
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return (c1->get_height() > c2->get_height());
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}
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@ -38,14 +38,6 @@ public:
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unsigned int _x, _y;
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};
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// An STL function object to sort the characters in order from tallest
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// to shortest. This provides a more optimal packing into the
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// resulting image.
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class SortCharBitmap {
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public:
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INLINE bool operator() (const CharBitmap *c1, const CharBitmap *c2) const;
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};
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#include "charBitmap.I"
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#endif
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File diff suppressed because it is too large
Load Diff
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@ -19,6 +19,7 @@ class CharBitmap;
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class EggGroup;
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class EggTexture;
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class EggVertexPool;
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class FontFile;
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////////////////////////////////////////////////////////////////////
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// Class : EggMakeFont
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@ -47,18 +48,7 @@ private:
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bool choose_scale_factor();
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void choose_image_size();
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unsigned int fetch_nibble();
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unsigned int fetch_packed_int();
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unsigned int fetch_byte();
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unsigned int fetch_int(int n = 4);
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int fetch_signed_int(int n = 4);
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bool do_character(int flag_byte);
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void do_xxx(int num_bytes);
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void do_yyy();
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void do_post();
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void do_pre();
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void read_pk();
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void unsmooth_rgb(PNMImage &image);
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string expand_hyphen(const string &str);
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public:
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@ -66,8 +56,10 @@ public:
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private:
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Filename _output_image_filename;
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Filename _input_pk_filename;
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Filename _input_font_filename;
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bool _got_output_size;
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Colord _fg, _bg;
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bool _use_alpha;
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int _output_xsize, _output_ysize, _output_zsize;
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double _buffer_pixels;
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double _poly_pixels;
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@ -77,19 +69,7 @@ private:
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bool _get_all;
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string _only_chars;
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double _ds;
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double _vppp;
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double _hppp;
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bool _post;
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bool _post_warning;
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int _p;
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bool _high;
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int _dyn_f;
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int _repeat_count;
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vector<unsigned char> _pk;
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typedef vector<CharBitmap *> Chars;
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Chars _chars;
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FontFile *_font;
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typedef map<int, PT(EggGroup)> EggDefs;
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EggDefs _egg_defs;
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@ -0,0 +1,78 @@
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// Filename: fontFile.I
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// Created by: drose (18Feb01)
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//
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////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////
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// Function: FontFile::get_ds
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// Access: Public
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// Description: Returns the designed size of the font in points.
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// This is the basic height of a line of text in the
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// given font.
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////////////////////////////////////////////////////////////////////
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INLINE double FontFile::
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get_ds() const {
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return _ds;
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}
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////////////////////////////////////////////////////////////////////
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// Function: FontFile::get_dpi
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// Access: Public
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// Description: Returns the resolution of the rasterized font in dots
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// per inch. This is mainly useful for user
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// information; use get_vppp() and get_hppp() for more
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// precises measurements.
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////////////////////////////////////////////////////////////////////
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INLINE double FontFile::
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get_dpi() const {
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return floor(_vppp * 72.27 + 0.5);
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}
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////////////////////////////////////////////////////////////////////
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// Function: FontFile::get_vppp
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// Access: Public
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// Description: Returns the vertical pixels per point of the
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// rasterized font characters. This is the number of
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// pixels high each bitmap characters is per point of
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// font.
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////////////////////////////////////////////////////////////////////
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INLINE double FontFile::
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get_vppp() const {
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return _vppp;
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}
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////////////////////////////////////////////////////////////////////
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// Function: FontFile::get_hppp
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// Access: Public
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// Description: Returns the horizontal pixels per point of the
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// rasterized font characters. This is the number of
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// pixels wide each bitmap characters is per point of
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// font.
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////////////////////////////////////////////////////////////////////
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INLINE double FontFile::
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get_hppp() const {
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return _hppp;
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}
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////////////////////////////////////////////////////////////////////
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// Function: FontFile::get_num_chars
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// Access: Public
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// Description: Returns the number of characters (glyphs) read from
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// the font.
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////////////////////////////////////////////////////////////////////
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INLINE int FontFile::
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get_num_chars() const {
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return _chars.size();
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}
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////////////////////////////////////////////////////////////////////
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// Function: FontFile::get_char
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// Access: Public
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// Description: Returns the nth character (glyph) read from the font.
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////////////////////////////////////////////////////////////////////
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INLINE CharBitmap *FontFile::
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get_char(int n) const {
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nassertr(n >= 0 && n < (int)_chars.size(), (CharBitmap *)NULL);
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return _chars[n];
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}
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@ -0,0 +1,54 @@
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// Filename: fontFile.cxx
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// Created by: drose (18Feb01)
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//
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////////////////////////////////////////////////////////////////////
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#include "fontFile.h"
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#include "charBitmap.h"
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#include <algorithm>
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// An STL function object to sort the characters in order from tallest
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// to shortest. This provides a more optimal packing into the
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// resulting image.
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class SortCharBitmap {
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public:
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bool operator() (const CharBitmap *c1, const CharBitmap *c2) const {
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return (c1->get_height() > c2->get_height());
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}
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};
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////////////////////////////////////////////////////////////////////
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// Function: FontFile::Constructor
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// Access: Public
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// Description:
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////////////////////////////////////////////////////////////////////
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FontFile::
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FontFile() {
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// A standard design size for font types that don't specify
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// otherwise.
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_ds = 12.0;
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}
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////////////////////////////////////////////////////////////////////
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// Function: FontFile::Destructor
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// Access: Public, Virtual
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// Description:
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////////////////////////////////////////////////////////////////////
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FontFile::
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~FontFile() {
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}
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////////////////////////////////////////////////////////////////////
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// Function: FontFile::sort_chars_by_height
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// Access: Public
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// Description: Sorts the array of characters in the font as returned
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// by get_char() so that the tallest ones appear first
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// in the list.
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////////////////////////////////////////////////////////////////////
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void FontFile::
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sort_chars_by_height() {
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sort(_chars.begin(), _chars.end(), SortCharBitmap());
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}
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@ -0,0 +1,52 @@
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// Filename: fontFile.h
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// Created by: drose (18Feb01)
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//
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////////////////////////////////////////////////////////////////////
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#ifndef FONTFILE_H
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#define FONTFILE_H
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#include <pandatoolbase.h>
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#include <filename.h>
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#include <notify.h>
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#include <math.h>
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class CharBitmap;
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////////////////////////////////////////////////////////////////////
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// Class : FontFile
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// Description : This is an abstract base class that provides the
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// interface to reading and/or rasterizing a particular
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// font file.
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////////////////////////////////////////////////////////////////////
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class FontFile {
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public:
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FontFile();
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virtual ~FontFile();
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virtual bool read(const Filename &filename,
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bool extract_all, const string &extract_only)=0;
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INLINE double get_ds() const;
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INLINE double get_dpi() const;
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INLINE double get_vppp() const;
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INLINE double get_hppp() const;
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void sort_chars_by_height();
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INLINE int get_num_chars() const;
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INLINE CharBitmap *get_char(int n) const;
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protected:
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double _ds;
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double _vppp;
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double _hppp;
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typedef vector<CharBitmap *> Chars;
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Chars _chars;
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};
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#include "fontFile.I"
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#endif
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@ -0,0 +1,909 @@
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// Filename: pkFontFile.cxx
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// Created by: drose (18Feb01)
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//
|
||||
////////////////////////////////////////////////////////////////////
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||||
|
||||
#include "pkFontFile.h"
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||||
#include "charBitmap.h"
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||||
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/********************************************************************
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||||
|
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I found the following in a source file for pftype called pftype.web.
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It's some nutty TeX-based Pascal program, and the documentation is a
|
||||
little hard to read because of the embedded TeX formatting controls.
|
||||
But it describes quite thoroughly the format of the pk file.
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||||
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||||
*********************************************************************
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||||
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||||
@* Packed file format.
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||||
The packed file format is a compact representation of the data contained in a
|
||||
\.{GF} file. The information content is the same, but packed (\.{PK}) files
|
||||
are almost always less than half the size of their \.{GF} counterparts. They
|
||||
are also easier to convert into a raster representation because they do not
|
||||
have a profusion of \\{paint}, \\{skip}, and \\{new\_row} commands to be
|
||||
separately interpreted. In addition, the \.{PK} format expressedly forbids
|
||||
\&{special} commands within a character. The minimum bounding box for each
|
||||
character is explicit in the format, and does not need to be scanned for as in
|
||||
the \.{GF} format. Finally, the width and escapement values are combined with
|
||||
the raster information into character ``packets'', making it simpler in many
|
||||
cases to process a character.
|
||||
|
||||
A \.{PK} file is organized as a stream of 8-bit bytes. At times, these bytes
|
||||
might be split into 4-bit nybbles or single bits, or combined into multiple
|
||||
byte parameters. When bytes are split into smaller pieces, the `first' piece
|
||||
is always the most significant of the byte. For instance, the first bit of
|
||||
a byte is the bit with value 128; the first nybble can be found by dividing
|
||||
a byte by 16. Similarly, when bytes are combined into multiple byte
|
||||
parameters, the first byte is the most significant of the parameter. If the
|
||||
parameter is signed, it is represented by two's-complement notation.
|
||||
|
||||
The set of possible eight-bit values is separated into two sets, those that
|
||||
introduce a character definition, and those that do not. The values that
|
||||
introduce a character definition range from 0 to 239; byte values
|
||||
above 239 are interpreted as commands. Bytes that introduce character
|
||||
definitions are called flag bytes, and various fields within the byte indicate
|
||||
various things about how the character definition is encoded. Command bytes
|
||||
have zero or more parameters, and can never appear within a character
|
||||
definition or between parameters of another command, where they would be
|
||||
interpeted as data.
|
||||
|
||||
A \.{PK} file consists of a preamble, followed by a sequence of one or more
|
||||
character definitions, followed by a postamble. The preamble command must
|
||||
be the first byte in the file, followed immediately by its parameters.
|
||||
Any number of character definitions may follow, and any command but the
|
||||
preamble command and the postamble command may occur between character
|
||||
definitions. The very last command in the file must be the postamble.
|
||||
|
||||
@ The packed file format is intended to be easy to read and interpret by
|
||||
device drivers. The small size of the file reduces the input/output overhead
|
||||
each time a font is loaded. For those drivers that load and save each font
|
||||
file into memory, the small size also helps reduce the memory requirements.
|
||||
The length of each character packet is specified, allowing the character raster
|
||||
data to be loaded into memory by simply counting bytes, rather than
|
||||
interpreting each command; then, each character can be interpreted on a demand
|
||||
basis. This also makes it possible for a driver to skip a particular
|
||||
character quickly if it knows that the character is unused.
|
||||
|
||||
@ First, the command bytes will be presented; then the format of the
|
||||
character definitions will be defined. Eight of the possible sixteen
|
||||
commands (values 240 through 255) are currently defined; the others are
|
||||
reserved for future extensions. The commands are listed below. Each command
|
||||
is specified by its symbolic name (e.g., \\{pk\_no\_op}), its opcode byte,
|
||||
and any parameters. The parameters are followed by a bracketed number
|
||||
telling how many bytes they occupy, with the number preceded by a plus sign if
|
||||
it is a signed quantity. (Four byte quantities are always signed, however.)
|
||||
|
||||
\yskip\hang|pk_xxx1| 240 |k[1]| |x[k]|. This command is undefined in general;
|
||||
it functions as a $(k+2)$-byte \\{no\_op} unless special \.{PK}-reading
|
||||
programs are being used. \MF\ generates \\{xxx} commands when encountering
|
||||
a \&{special} string. It is recommended that |x| be a string having the form
|
||||
of a keyword followed by possible parameters relevant to that keyword.
|
||||
|
||||
\yskip\hang\\{pk\_xxx2} 241 |k[2]| |x[k]|. Like |pk_xxx1|, but |0<=k<65536|.
|
||||
|
||||
\yskip\hang\\{pk\_xxx3} 242 |k[3]| |x[k]|. Like |pk_xxx1|, but
|
||||
|0<=k<@t$2^{24}$@>|. \MF\ uses this when sending a \&{special} string whose
|
||||
length exceeds~255.
|
||||
|
||||
\yskip\hang\\{pk\_xxx4} 243 |k[4]| |x[k]|. Like |pk_xxx1|, but |k| can be
|
||||
ridiculously large; |k| musn't be negative.
|
||||
|
||||
\yskip\hang|pk_yyy| 244 |y[4]|. This command is undefined in general; it
|
||||
functions as a five-byte \\{no\_op} unless special \.{PK} reading programs
|
||||
are being used. \MF\ puts |scaled| numbers into |yyy|'s, as a result of
|
||||
\&{numspecial} commands; the intent is to provide numeric parameters to
|
||||
\\{xxx} commands that immediately precede.
|
||||
|
||||
\yskip\hang|pk_post| 245. Beginning of the postamble. This command is
|
||||
followed by enough |pk_no_op| commands to make the file a multiple
|
||||
of four bytes long. Zero through three bytes are usual, but any number
|
||||
is allowed.
|
||||
This should make the file easy to read on machines that pack four bytes to
|
||||
a word.
|
||||
|
||||
\yskip\hang|pk_no_op| 246. No operation, do nothing. Any number of
|
||||
|pk_no_op|'s may appear between \.{PK} commands, but a |pk_no_op| cannot be
|
||||
inserted between a command and its parameters, between two parameters, or
|
||||
inside a character definition.
|
||||
|
||||
\yskip\hang|pk_pre| 247 |i[1]| |k[1]| |x[k]| |ds[4]| |cs[4]| |hppp[4]|
|
||||
|vppp[4]|. Preamble command. Here, |i| is the identification byte of the
|
||||
file, currently equal to 89. The string |x| is merely a comment, usually
|
||||
indicating the source of the \.{PK} file. The parameters |ds| and |cs| are
|
||||
the design size of the file in $1/2^{20}$ points, and the checksum of the
|
||||
file, respectively. The checksum should match the \.{TFM} file and the
|
||||
\.{GF} files for this font. Parameters |hppp| and |vppp| are the ratios
|
||||
of pixels per point, horizontally and vertically, multiplied by $2^{16}$; they
|
||||
can be used to correlate the font with specific device resolutions,
|
||||
magnifications, and ``at sizes''. Usually, the name of the \.{PK} file is
|
||||
formed by concatenating the font name (e.g., cmr10) with the resolution at
|
||||
which the font is prepared in pixels per inch multiplied by the magnification
|
||||
factor, and the letters \.{pk}. For instance, cmr10 at 300 dots per inch
|
||||
should be named \.{cmr10.300pk}; at one thousand dots per inch and magstephalf,
|
||||
it should be named \.{cmr10.1095pk}.
|
||||
|
||||
@ We put a few of the above opcodes into definitions for symbolic use by
|
||||
this program.
|
||||
|
||||
@d pk_id = 89 {the version of \.{PK} file described}
|
||||
@d pk_xxx1 = 240 {\&{special} commands}
|
||||
@d pk_yyy = 244 {\&{numspecial} commands}
|
||||
@d pk_post = 245 {postamble}
|
||||
@d pk_no_op = 246 {no operation}
|
||||
@d pk_pre = 247 {preamble}
|
||||
@d pk_undefined == 248, 249, 250, 251, 252, 253, 254, 255
|
||||
|
||||
@ The \.{PK} format has two conflicting goals: to pack character raster and
|
||||
size information as compactly as possible, while retaining ease of translation
|
||||
into raster and other forms. A suitable compromise was found in the use of
|
||||
run-encoding of the raster information. Instead of packing the individual
|
||||
bits of the character, we instead count the number of consecutive `black' or
|
||||
`white' pixels in a horizontal raster row, and then encode this number. Run
|
||||
counts are found for each row from left to right, traversing rows from the
|
||||
top to bottom. This is essentially the way the \.{GF} format works.
|
||||
Instead of presenting each row individually, however, we concatenate all
|
||||
of the horizontal raster rows into one long string of pixels, and encode this
|
||||
row. With knowledge of the width of the bit-map, the original character glyph
|
||||
can easily be reconstructed. In addition, we do not need special commands to
|
||||
mark the end of one row and the beginning of the next.
|
||||
|
||||
Next, we place the burden of finding the minimum bounding box on the part
|
||||
of the font generator, since the characters will usually be used much more
|
||||
often than they are generated. The minimum bounding box is the smallest
|
||||
rectangle that encloses all `black' pixels of a character. We also
|
||||
eliminate the need for a special end of character marker, by supplying
|
||||
exactly as many bits as are required to fill the minimum bounding box, from
|
||||
which the end of the character is implicit.
|
||||
|
||||
Let us next consider the distribution of the run counts. Analysis of several
|
||||
dozen pixel files at 300 dots per inch yields a distribution peaking at four,
|
||||
falling off slowly until ten, then a bit more steeply until twenty, and then
|
||||
asymptotically approaching the horizontal. Thus, the great majority of our
|
||||
run counts will fit in a four-bit nybble. The eight-bit byte is attractive for
|
||||
our run-counts, as it is the standard on many systems; however, the wasted four
|
||||
bits in the majority of cases seem a high price to pay. Another possibility
|
||||
is to use a Huffman-type encoding scheme with a variable number of bits for
|
||||
each run-count; this was rejected because of the overhead in fetching and
|
||||
examining individual bits in the file. Thus, the character raster definitions
|
||||
in the \.{PK} file format are based on the four-bit nybble.
|
||||
|
||||
@ An analysis of typical pixel files yielded another interesting statistic:
|
||||
Fully 37\char`\%\
|
||||
of the raster rows were duplicates of the previous row. Thus, the \.{PK}
|
||||
format allows the specification of repeat counts, which indicate how many times
|
||||
a horizontal raster row is to be repeated. These repeated rows are taken out
|
||||
of the character glyph before individual rows are concatenated into the long
|
||||
string of pixels.
|
||||
|
||||
For elegance, we disallow a run count of zero. The case of a null raster
|
||||
description should be gleaned from the character width and height being equal
|
||||
to zero, and no raster data should be read. No other zero counts are ever
|
||||
necessary. Also, in the absence of repeat counts, the repeat value is set to
|
||||
be zero (only the original row is sent.) If a repeat count is seen, it takes
|
||||
effect on the current row. The current row is defined as the row on which the
|
||||
first pixel of the next run count will lie. The repeat count is set back to
|
||||
zero when the last pixel in the current row is seen, and the row is sent out.
|
||||
|
||||
This poses a problem for entirely black and entirely white rows, however. Let
|
||||
us say that the current row ends with four white pixels, and then we have five
|
||||
entirely empty rows, followed by a black pixel at the beginning of the next
|
||||
row, and the character width is ten pixels. We would like to use a repeat
|
||||
count, but there is no legal place to put it. If we put it before the white
|
||||
run count, it will apply to the current row. If we put it after, it applies
|
||||
to the row with the black pixel at the beginning. Thus, entirely white or
|
||||
entirely black repeated rows are always packed as large run counts (in this
|
||||
case, a white run count of 54) rather than repeat counts.
|
||||
|
||||
@ Now we turn our attention to the actual packing of the run counts and
|
||||
repeat counts into nybbles. There are only sixteen possible nybble values.
|
||||
We need to indicate run counts and repeat counts. Since the run counts are
|
||||
much more common, we will devote the majority of the nybble values to them.
|
||||
We therefore indicate a repeat count by a nybble of 14 followed by a packed
|
||||
number, where a packed number will be explained later. Since the repeat
|
||||
count value of one is so common, we indicate a repeat one command by a single
|
||||
nybble of 15. A 14 followed by the packed number 1 is still legal for a
|
||||
repeat one count. The run counts are coded directly as packed
|
||||
numbers.
|
||||
|
||||
For packed numbers, therefore, we have the nybble values 0 through 13. We
|
||||
need to represent the positive integers up to, say, $2^{31}-1$. We would
|
||||
like the more common smaller numbers to take only one or two nybbles, and
|
||||
the infrequent large numbers to take three or more. We could therefore
|
||||
allocate one nybble value to indicate a large run count taking three or more
|
||||
nybbles. We do this with the value 0.
|
||||
|
||||
@ We are left with the values 1 through 13. We can allocate some of these, say
|
||||
|dyn_f|, to be one-nybble run counts.
|
||||
These will work for the run counts |1..dyn_f|. For subsequent run
|
||||
counts, we will use a nybble greater than |dyn_f|, followed by a second nybble,
|
||||
whose value can run from 0 through 15. Thus, the two-nybble values will
|
||||
run from |dyn_f+1..(13-dyn_f)*16+dyn_f|. We have our definition of large run
|
||||
count values now, being all counts greater than |(13-dyn_f)*16+dyn_f|.
|
||||
|
||||
We can analyze our several dozen pixel files and determine an optimal value of
|
||||
|dyn_f|, and use this value for all of the characters. Unfortunately, values
|
||||
of |dyn_f| that pack small characters well tend to pack the large characters
|
||||
poorly, and values that pack large characters well are not efficient for the
|
||||
smaller characters. Thus, we choose the optimal |dyn_f| on a character basis,
|
||||
picking the value that will pack each individual character in the smallest
|
||||
number of nybbles. Legal values of |dyn_f| run from 0 (with no one-nybble run
|
||||
counts) to 13 (with no two-nybble run counts).
|
||||
|
||||
@ Our only remaining task in the coding of packed numbers is the large run
|
||||
counts. We use a scheme suggested by D.~E.~Knuth
|
||||
@^Knuth, Donald Ervin@>
|
||||
that simply and elegantly represents arbitrarily large values. The
|
||||
general scheme to represent an integer |i| is to write its hexadecimal
|
||||
representation, with leading zeros removed. Then we count the number of
|
||||
digits, and prepend one less than that many zeros before the hexadecimal
|
||||
representation. Thus, the values from one to fifteen occupy one nybble;
|
||||
the values sixteen through 255 occupy three, the values 256 through 4095
|
||||
require five, etc.
|
||||
|
||||
For our purposes, however, we have already represented the numbers one
|
||||
through |(13-dyn_f)*16+dyn_f|. In addition, the one-nybble values have
|
||||
already been taken by our other commands, which means that only the values
|
||||
from sixteen up are available to us for long run counts. Thus, we simply
|
||||
normalize our long run counts, by subtracting |(13-dyn_f)*16+dyn_f+1| and
|
||||
adding 16, and then we represent the result according to the scheme above.
|
||||
|
||||
@ The final algorithm for decoding the run counts based on the above scheme
|
||||
looks like this, assuming that a procedure called \\{pk\_nyb} is available
|
||||
to get the next nybble from the file, and assuming that the global
|
||||
|repeat_count| indicates whether a row needs to be repeated. Note that this
|
||||
routine is recursive, but since a repeat count can never directly follow
|
||||
another repeat count, it can only be recursive to one level.
|
||||
|
||||
@<Packed number procedure@>=
|
||||
function pk_packed_num : integer ;
|
||||
var i, @!j : integer ;
|
||||
begin
|
||||
i := get_nyb ;
|
||||
if i = 0 then begin
|
||||
repeat j := get_nyb ; incr(i) ; until j <> 0 ;
|
||||
while i > 0 do begin j := j * 16 + get_nyb ; decr(i) ; end ;
|
||||
pk_packed_num := j - 15 + (13-dyn_f)*16 + dyn_f ;
|
||||
end else if i <= dyn_f then
|
||||
pk_packed_num := i
|
||||
else if i < 14 then
|
||||
pk_packed_num := (i-dyn_f-1)*16+get_nyb+dyn_f+1
|
||||
else begin
|
||||
if repeat_count <> 0 then abort('Second repeat count for this row!') ;
|
||||
@.Second repeat count...@>
|
||||
repeat_count := 1; {prevent recursion more than one level}
|
||||
if i = 14 then repeat_count := pk_packed_num;
|
||||
send_out(true, repeat_count) ;
|
||||
pk_packed_num := pk_packed_num ;
|
||||
end ;
|
||||
end ;
|
||||
|
||||
@ For low resolution fonts, or characters with `gray' areas, run encoding can
|
||||
often make the character many times larger. Therefore, for those characters
|
||||
that cannot be encoded efficiently with run counts, the \.{PK} format allows
|
||||
bit-mapping of the characters. This is indicated by a |dyn_f| value of
|
||||
14. The bits are packed tightly, by concatenating all of the horizontal raster
|
||||
rows into one long string, and then packing this string eight bits to a byte.
|
||||
The number of bytes required can be calculated by |(width*height+7) div 8|.
|
||||
This format should only be used when packing the character by run counts takes
|
||||
more bytes than this, although, of course, it is legal for any character.
|
||||
Any extra bits in the last byte should be set to zero.
|
||||
|
||||
@ At this point, we are ready to introduce the format for a character
|
||||
descriptor. It consists of three parts: a flag byte, a character preamble,
|
||||
and the raster data. The most significant four bits of the flag byte
|
||||
yield the |dyn_f| value for that character. (Notice that only values of
|
||||
0 through 14 are legal for |dyn_f|, with 14 indicating a bit mapped character;
|
||||
thus, the flag bytes do not conflict with the command bytes, whose upper nybble
|
||||
is always 15.) The next bit (with weight 8) indicates whether the first run
|
||||
count is a black count or a white count, with a one indicating a black count.
|
||||
For bit-mapped characters, this bit should be set to a zero. The next bit
|
||||
(with weight 4) indicates whether certain later parameters (referred to as size
|
||||
parameters) are given in one-byte or two-byte quantities, with a one indicating
|
||||
that they are in two-byte quantities. The last two bits are concatenated on to
|
||||
the beginning of the packet-length parameter in the character preamble,
|
||||
which will be explained below.
|
||||
|
||||
However, if the last three bits of the flag byte are all set (normally
|
||||
indicating that the size parameters are two-byte values and that a 3 should be
|
||||
prepended to the length parameter), then a long format of the character
|
||||
preamble should be used instead of one of the short forms.
|
||||
|
||||
Therefore, there are three formats for the character preamble; the one that
|
||||
is used depends on the least significant three bits of the flag byte. If the
|
||||
least significant three bits are in the range zero through three, the short
|
||||
format is used. If they are in the range four through six, the extended short
|
||||
format is used. Otherwise, if the least significant bits are all set, then
|
||||
the long form of the character preamble is used. The preamble formats are
|
||||
explained below.
|
||||
|
||||
\yskip\hang Short form: |flag[1]| |pl[1]| |cc[1]| |tfm[3]| |dm[1]| |w[1]|
|
||||
|h[1]| |hoff[+1]| |voff[+1]|.
|
||||
If this format of the character preamble is used, the above
|
||||
parameters must all fit in the indicated number of bytes, signed or unsigned
|
||||
as indicated. Almost all of the standard \TeX\ font characters fit; the few
|
||||
exceptions are fonts such as \.{cminch}.
|
||||
|
||||
\yskip\hang Extended short form: |flag[1]| |pl[2]| |cc[1]| |tfm[3]| |dm[2]|
|
||||
|w[2]| |h[2]| |hoff[+2]| |voff[+2]|. Larger characters use this extended
|
||||
format.
|
||||
|
||||
\yskip\hang Long form: |flag[1]| |pl[4]| |cc[4]| |tfm[4]| |dx[4]| |dy[4]|
|
||||
|w[4]| |h[4]| |hoff[4]| |voff[4]|. This is the general format that
|
||||
allows all of the
|
||||
parameters of the \.{GF} file format, including vertical escapement.
|
||||
\vskip\baselineskip
|
||||
The |flag| parameter is the flag byte. The parameter |pl| (packet length)
|
||||
contains the offset
|
||||
of the byte following this character descriptor, with respect to the beginning
|
||||
of the |tfm| width parameter. This is given so a \.{PK} reading program can,
|
||||
once it has read the flag byte, packet length, and character code (|cc|), skip
|
||||
over the character by simply reading this many more bytes. For the two short
|
||||
forms of the character preamble, the last two bits of the flag byte should be
|
||||
considered the two most-significant bits of the packet length. For the short
|
||||
format, the true packet length might be calculated as |(flag mod 4)*256+pl|;
|
||||
for the short extended format, it might be calculated as
|
||||
|(flag mod 4)*65536+pl|.
|
||||
|
||||
The |w| parameter is the width and the |h| parameter is the height in pixels
|
||||
of the minimum bounding box. The |dx| and |dy| parameters are the horizontal
|
||||
and vertical escapements, respectively. In the short formats, |dy| is assumed
|
||||
to be zero and |dm| is |dx| but in pixels;
|
||||
in the long format, |dx| and |dy| are both
|
||||
in pixels multiplied by $2^{16}$. The |hoff| is the horizontal offset from the
|
||||
upper left pixel to the reference pixel; the |voff| is the vertical offset.
|
||||
They are both given in pixels, with right and down being positive. The
|
||||
reference pixel is the pixel that occupies the unit square in \MF; the
|
||||
\MF\ reference point is the lower left hand corner of this pixel. (See the
|
||||
example below.)
|
||||
|
||||
@ \TeX\ requires all characters that have the same character codes
|
||||
modulo 256 to have also the same |tfm| widths and escapement values. The \.{PK}
|
||||
format does not itself make this a requirement, but in order for the font to
|
||||
work correctly with the \TeX\ software, this constraint should be observed.
|
||||
(The standard version of \TeX\ cannot output character codes greater
|
||||
than 255, but extended versions do exist.)
|
||||
|
||||
Following the character preamble is the raster information for the
|
||||
character, packed by run counts or by bits, as indicated by the flag byte.
|
||||
If the character is packed by run counts and the required number of nybbles
|
||||
is odd, then the last byte of the raster description should have a zero
|
||||
for its least significant nybble.
|
||||
|
||||
@ As an illustration of the \.{PK} format, the character \char4\ from the font
|
||||
amr10 at 300 dots per inch will be encoded. This character was chosen
|
||||
because it illustrates some
|
||||
of the borderline cases. The raster for the character looks like this (the
|
||||
row numbers are chosen for convenience, and are not \MF's row numbers.)
|
||||
|
||||
\vskip\baselineskip
|
||||
{\def\smbox{\vrule height 7pt width 7pt depth 0pt \hskip 3pt}%
|
||||
\catcode`\*=\active \let*=\smbox
|
||||
\centerline{\vbox{\baselineskip=10pt
|
||||
\halign{\hfil#\quad&&\hfil#\hfil\cr
|
||||
0& & &*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*\cr
|
||||
1& & &*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*\cr
|
||||
2& & &*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*\cr
|
||||
3& & &*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*\cr
|
||||
4& & &*&*& & & & & & & & & & & & & & & & &*&*\cr
|
||||
5& & &*&*& & & & & & & & & & & & & & & & &*&*\cr
|
||||
6& & &*&*& & & & & & & & & & & & & & & & &*&*\cr
|
||||
7\cr
|
||||
8\cr
|
||||
9& & & & &*&*& & & & & & & & & & & & &*&*& & \cr
|
||||
10& & & & &*&*& & & & & & & & & & & & &*&*& & \cr
|
||||
11& & & & &*&*& & & & & & & & & & & & &*&*& & \cr
|
||||
12& & & & &*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*& & \cr
|
||||
13& & & & &*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*& & \cr
|
||||
14& & & & &*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*& & \cr
|
||||
15& & & & &*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*& & \cr
|
||||
16& & & & &*&*& & & & & & & & & & & & &*&*& & \cr
|
||||
17& & & & &*&*& & & & & & & & & & & & &*&*& & \cr
|
||||
18& & & & &*&*& & & & & & & & & & & & &*&*& & \cr
|
||||
19\cr
|
||||
20\cr
|
||||
21\cr
|
||||
22& & &*&*& & & & & & & & & & & & & & & & &*&*\cr
|
||||
23& & &*&*& & & & & & & & & & & & & & & & &*&*\cr
|
||||
24& & &*&*& & & & & & & & & & & & & & & & &*&*\cr
|
||||
25& & &*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*\cr
|
||||
26& & &*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*\cr
|
||||
27& & &*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*\cr
|
||||
28&+& &*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*&*\cr
|
||||
&\hphantom{*}&\hphantom{*}\cr
|
||||
}}}}
|
||||
The width of the minimum bounding box for this character is 20; its height
|
||||
is 29. The `+' represents the reference pixel; notice how it lies outside the
|
||||
minimum bounding box. The |hoff| value is $-2$, and the |voff| is~28.
|
||||
|
||||
The first task is to calculate the run counts and repeat counts. The repeat
|
||||
counts are placed at the first transition (black to white or white to black)
|
||||
in a row, and are enclosed in brackets. White counts are enclosed in
|
||||
parentheses. It is relatively easy to generate the counts list:
|
||||
\vskip\baselineskip
|
||||
\centerline{82 [2] (16) 2 (42) [2] 2 (12) 2 (4) [3]}
|
||||
\centerline{16 (4) [2] 2 (12) 2 (62) [2] 2 (16) 82}
|
||||
\vskip\baselineskip
|
||||
Note that any duplicated rows that are not all white or all black are removed
|
||||
before the run counts are calculated. The rows thus removed are rows 5, 6,
|
||||
10, 11, 13, 14, 15, 17, 18, 23, and 24.
|
||||
|
||||
@ The next step in the encoding of this character is to calculate the optimal
|
||||
value of |dyn_f|. The details of how this calculation is done are not
|
||||
important here; suffice it to say that there is a simple algorithm that can
|
||||
determine the best value of |dyn_f| in one pass over the count list. For this
|
||||
character, the optimal value turns out to be 8 (atypically low). Thus, all
|
||||
count values less than or equal to 8 are packed in one nybble; those from
|
||||
nine to $(13-8)*16+8$ or 88 are packed in two nybbles. The run encoded values
|
||||
now become (in hex, separated according to the above list):
|
||||
\vskip\baselineskip
|
||||
\centerline{\tt D9 E2 97 2 B1 E2 2 93 2 4 E3}
|
||||
\centerline{\tt 97 4 E2 2 93 2 C5 E2 2 97 D9}
|
||||
\vskip\baselineskip\noindent
|
||||
which comes to 36 nybbles, or 18 bytes. This is shorter than the 73 bytes
|
||||
required for the bit map, so we use the run count packing.
|
||||
|
||||
@ The short form of the character preamble is used because all of the
|
||||
parameters fit in their respective lengths. The packet length is therefore
|
||||
18 bytes for the raster, plus
|
||||
eight bytes for the character preamble parameters following the character
|
||||
code, or 26. The |tfm| width for this character is 640796, or {\tt 9C71C} in
|
||||
hexadecimal. The horizontal escapement is 25 pixels. The flag byte is
|
||||
88 hex, indicating the short preamble, the black first count, and the
|
||||
|dyn_f| value of 8. The final total character packet, in hexadecimal, is:
|
||||
\vskip\baselineskip
|
||||
$$\vbox{\halign{\hfil #\quad&&{\tt #\ }\cr
|
||||
Flag byte&88\cr
|
||||
Packet length&1A\cr
|
||||
Character code&04\cr
|
||||
|tfm| width&09&C7&1C\cr
|
||||
Horizontal escapement (pixels)&19\cr
|
||||
Width of bit map&14\cr
|
||||
Height of bit map&1D\cr
|
||||
Horizontal offset (signed)&FE\cr
|
||||
Vertical offset&1C\cr
|
||||
Raster data&D9&E2&97\cr
|
||||
&2B&1E&22\cr
|
||||
&93&24&E3\cr
|
||||
&97&4E&22\cr
|
||||
&93&2C&5E\cr
|
||||
&22&97&D9\cr}}$$
|
||||
********************************************************************/
|
||||
|
||||
#define PK_XXX1 240
|
||||
#define PK_XXX2 241
|
||||
#define PK_XXX3 242
|
||||
#define PK_XXX4 243
|
||||
#define PK_YYY 244
|
||||
#define PK_POST 245
|
||||
#define PK_NO_OP 246
|
||||
#define PK_PRE 247
|
||||
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: PkFontFile::Constructor
|
||||
// Access: Public
|
||||
// Description:
|
||||
////////////////////////////////////////////////////////////////////
|
||||
PkFontFile::
|
||||
PkFontFile() {
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: PkFontFile::read
|
||||
// Access: Public, Virtual
|
||||
// Description: Attempts to read the font from the indicated file.
|
||||
// Returns true if successful, false if there is an
|
||||
// error.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
bool PkFontFile::
|
||||
read(const Filename &filename, bool extract_all, const string &extract_only) {
|
||||
Filename input_filename = filename;
|
||||
|
||||
input_filename.set_binary();
|
||||
ifstream pk_file;
|
||||
if (!input_filename.open_read(pk_file)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// First, read the whole thing into a memory buffer, so we can
|
||||
// easily access bytes at random locations in the file.
|
||||
unsigned char c = pk_file.get();
|
||||
while (pk_file && !pk_file.eof()) {
|
||||
_pk.push_back(c);
|
||||
c = pk_file.get();
|
||||
}
|
||||
|
||||
_p = 0;
|
||||
_high = true;
|
||||
_post = false;
|
||||
_post_warning = false;
|
||||
|
||||
_extract_all = extract_all;
|
||||
_extract_only = extract_only;
|
||||
|
||||
return read_pk();
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: PkFontFile::fetch_nibble
|
||||
// Access: Private
|
||||
// Description: Returns the next 4-bit nibble from the pk stream.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
unsigned int PkFontFile::
|
||||
fetch_nibble() {
|
||||
assert(_p < (int)_pk.size());
|
||||
if (_high) {
|
||||
_high = false;
|
||||
return _pk[_p] >> 4;
|
||||
} else {
|
||||
_high = true;
|
||||
return _pk[_p++] & 0xf;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: PkFontFile::fetch_packed_int
|
||||
// Access: Private
|
||||
// Description: Returns the next packed integer from the pk stream.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
unsigned int PkFontFile::
|
||||
fetch_packed_int() {
|
||||
int i = fetch_nibble();
|
||||
if (i == 0) {
|
||||
int j;
|
||||
do {
|
||||
j = fetch_nibble();
|
||||
i++;
|
||||
} while (j == 0);
|
||||
while (i > 0) {
|
||||
j = (j << 4) | fetch_nibble();
|
||||
i--;
|
||||
}
|
||||
return j - 15 + (13 - _dyn_f)*16 + _dyn_f;
|
||||
|
||||
} else if (i <= _dyn_f) {
|
||||
return i;
|
||||
|
||||
} else if (i < 14) {
|
||||
return (i - _dyn_f - 1)*16 + fetch_nibble() + _dyn_f + 1;
|
||||
|
||||
} else {
|
||||
_repeat_count = 1;
|
||||
if (i == 14) {
|
||||
_repeat_count = fetch_packed_int();
|
||||
}
|
||||
// nout << "[" << _repeat_count << "]";
|
||||
return fetch_packed_int();
|
||||
}
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: PkFontFile::fetch_byte
|
||||
// Access: Private
|
||||
// Description: Returns the next 8-bit unsigned byte from the pk
|
||||
// stream.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
unsigned int PkFontFile::
|
||||
fetch_byte() {
|
||||
assert(_high);
|
||||
assert(_p < (int)_pk.size());
|
||||
return _pk[_p++];
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: PkFontFile::fetch_int
|
||||
// Access: Private
|
||||
// Description: Returns the next n-byte unsigned int from
|
||||
// the pk stream.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
unsigned int PkFontFile::
|
||||
fetch_int(int n) {
|
||||
assert(_high);
|
||||
|
||||
unsigned int result = 0;
|
||||
for (int i = 0; i < n; i++) {
|
||||
assert(_p < (int)_pk.size());
|
||||
result = (result << 8) | _pk[_p];
|
||||
_p++;
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: PkFontFile::fetch_signed_int
|
||||
// Access: Private
|
||||
// Description: Returns the next n-byte signed int from
|
||||
// the pk stream.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
int PkFontFile::
|
||||
fetch_signed_int(int n) {
|
||||
assert(_high);
|
||||
|
||||
assert(_p < (int)_pk.size());
|
||||
int result = (signed char)_pk[_p];
|
||||
_p++;
|
||||
for (int i = 1; i < n; i++) {
|
||||
assert(_p < (int)_pk.size());
|
||||
result = (result << 8) | _pk[_p];
|
||||
_p++;
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: PkFontFile::do_character
|
||||
// Access: Private
|
||||
// Description: Reads a single character from the pk file and
|
||||
// processes it. Returns true if successful, false if
|
||||
// something bad happened.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
bool PkFontFile::
|
||||
do_character(int flag_byte) {
|
||||
// int start_p = _p - 1;
|
||||
_dyn_f = (flag_byte >> 4);
|
||||
bool first_black = ((flag_byte & 0x8) != 0);
|
||||
int bsize = (flag_byte & 0x4) ? 2 : 1;
|
||||
int prepend_length = (flag_byte & 0x3);
|
||||
|
||||
bool use_long_form = ((flag_byte & 0x7) == 0x7);
|
||||
|
||||
unsigned int pl, cc, itfm, w, h;
|
||||
int hoff, voff;
|
||||
unsigned int idx = 0;
|
||||
unsigned int idy = 0;
|
||||
int next_p;
|
||||
|
||||
if (use_long_form) {
|
||||
pl = fetch_int();
|
||||
cc = fetch_int();
|
||||
next_p = _p + pl;
|
||||
itfm = fetch_int();
|
||||
idx = fetch_int();
|
||||
idy = fetch_int();
|
||||
w = fetch_int();
|
||||
h = fetch_int();
|
||||
hoff = fetch_signed_int();
|
||||
voff = fetch_signed_int();
|
||||
} else {
|
||||
pl = fetch_int(bsize) | (prepend_length << bsize*8);
|
||||
cc = fetch_byte();
|
||||
next_p = _p + pl;
|
||||
itfm = fetch_int(3);
|
||||
idx = fetch_int(bsize) << 16;
|
||||
w = fetch_int(bsize);
|
||||
h = fetch_int(bsize);
|
||||
hoff = fetch_signed_int(bsize);
|
||||
voff = fetch_signed_int(bsize);
|
||||
}
|
||||
|
||||
// double tfm = (double)itfm / (double)(1 << 24);
|
||||
double dx = (double)idx / (double)(1 << 16);
|
||||
double dy = (double)idy / (double)(1 << 16);
|
||||
// double di_width = tfm * _ppu * _hppp / _vppp;
|
||||
|
||||
if (_extract_all ||
|
||||
((cc >= 33 && cc <= 127) &&
|
||||
(_extract_only.empty() || _extract_only.find((char)cc) != string::npos))) {
|
||||
nout << " " << cc;
|
||||
|
||||
CharBitmap *bm = new CharBitmap(cc, w, h, hoff, voff, dx, dy);
|
||||
|
||||
if (_dyn_f == 14) {
|
||||
// A bitmapped character: this character has the actual w x h
|
||||
// bits stored directly in the pk file. This kind of character
|
||||
// is quite rare, and the code is therefore untested.
|
||||
if (h > 0 && w > 0) {
|
||||
nout
|
||||
<< "\nA rare bitmapped character encountered! You are now running\n"
|
||||
<< "untested code. If this works, change this line in the program\n"
|
||||
<< "to indicate that the code is actually tested!\n\n";
|
||||
}
|
||||
|
||||
unsigned int bit = 0;
|
||||
unsigned int byte = 0;
|
||||
for (unsigned int y = 0; y < h; y++) {
|
||||
for (unsigned int x = 0; x < w; x++) {
|
||||
if (bit == 0) {
|
||||
bit = 0x80;
|
||||
byte = fetch_byte();
|
||||
}
|
||||
bm->_block[y][x] = ((byte & bit)!=0);
|
||||
bit >>= 1;
|
||||
}
|
||||
}
|
||||
|
||||
} else {
|
||||
// A normal, rle character. This character has sequences of
|
||||
// black and white runs stored in the pk file. Most characters
|
||||
// will be stored this way.
|
||||
bool black = first_black;
|
||||
_repeat_count = 0;
|
||||
|
||||
int count = fetch_packed_int();
|
||||
while (bm->paint(black, count, _repeat_count)) {
|
||||
/*
|
||||
if (black) {
|
||||
nout << count;
|
||||
} else {
|
||||
nout << "(" << count << ")";
|
||||
}
|
||||
*/
|
||||
black = !black;
|
||||
count = fetch_packed_int();
|
||||
}
|
||||
// nout << "\n";
|
||||
}
|
||||
|
||||
_chars.push_back(bm);
|
||||
|
||||
/*
|
||||
for (int y = 0; y < h; y++) {
|
||||
for (int x = 0; x < w; x++) {
|
||||
nout << (bm->_block[y][x] ? ' ' : '*');
|
||||
}
|
||||
nout << "\n";
|
||||
}
|
||||
*/
|
||||
|
||||
if (!_high) {
|
||||
_p++;
|
||||
_high = true;
|
||||
}
|
||||
|
||||
if (_p != next_p) {
|
||||
nout << "Expected p == " << next_p << " got " << _p << "\n";
|
||||
}
|
||||
|
||||
} else {
|
||||
nout << " (" << cc << ")";
|
||||
}
|
||||
|
||||
_p = next_p;
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: PkFontFile::do_xxx
|
||||
// Access: Private
|
||||
// Description: The xxx1 .. xxx4 series of commands specify an
|
||||
// embedded comment or some such silliness in the pk
|
||||
// file that must be skipped.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
void PkFontFile::
|
||||
do_xxx(int num_bytes) {
|
||||
_p += fetch_int(num_bytes);
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: PkFontFile::do_yyy
|
||||
// Access: Private
|
||||
// Description: The yyy command is an encoded number which might have
|
||||
// meaning to a preceding xxx block, but means nothing
|
||||
// to us.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
void PkFontFile::
|
||||
do_yyy() {
|
||||
_p += 4;
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: PkFontFile::do_post
|
||||
// Access: Private
|
||||
// Description: The beginning of the postamble.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
void PkFontFile::
|
||||
do_post() {
|
||||
_post = true;
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: PkFontFile::do_pre
|
||||
// Access: Private
|
||||
// Description: The preamble.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
void PkFontFile::
|
||||
do_pre() {
|
||||
int id = fetch_byte();
|
||||
if (id != 89) {
|
||||
nout << "Warning: PK file had an unexpected ID, " << id << "\n";
|
||||
}
|
||||
|
||||
int comment_len = fetch_byte();
|
||||
|
||||
assert(_p + comment_len <= (int)_pk.size());
|
||||
nout.write(&_pk[_p], comment_len);
|
||||
nout << "\n";
|
||||
_p += comment_len;
|
||||
|
||||
int ds = fetch_int();
|
||||
fetch_int(); // cs
|
||||
int hppp = fetch_int();
|
||||
int vppp = fetch_int();
|
||||
|
||||
_ds = (double)ds / (double)(1 << 20);
|
||||
_hppp = (double)hppp / (double)(1 << 16);
|
||||
_vppp = (double)vppp / (double)(1 << 16);
|
||||
|
||||
nout << "Font size is " << get_ds() << " points, rasterized at "
|
||||
<< get_dpi() << " DPI.\n";
|
||||
}
|
||||
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: PkFontFile::read_pk
|
||||
// Access: Private
|
||||
// Description:
|
||||
////////////////////////////////////////////////////////////////////
|
||||
bool PkFontFile::
|
||||
read_pk() {
|
||||
if (_p >= (int)_pk.size()) {
|
||||
nout << "PK file is empty.\n";
|
||||
return false;
|
||||
}
|
||||
unsigned int cmd = fetch_byte();
|
||||
if (cmd != PK_PRE) {
|
||||
nout << "Not a PK file.\n";
|
||||
return false;
|
||||
}
|
||||
do_pre();
|
||||
|
||||
nout << "Characters:";
|
||||
|
||||
while (_p < (int)_pk.size()) {
|
||||
unsigned int cmd = fetch_byte();
|
||||
if (_post && !_post_warning && cmd != PK_NO_OP) {
|
||||
_post_warning = true;
|
||||
nout << "\nWarning: postamble was not the last command.\n";
|
||||
}
|
||||
if (cmd < 240) {
|
||||
if (!do_character(cmd)) {
|
||||
return true;
|
||||
}
|
||||
} else {
|
||||
switch (cmd) {
|
||||
case PK_XXX1:
|
||||
do_xxx(1);
|
||||
break;
|
||||
|
||||
case PK_XXX2:
|
||||
do_xxx(2);
|
||||
break;
|
||||
|
||||
case PK_XXX3:
|
||||
do_xxx(3);
|
||||
break;
|
||||
|
||||
case PK_XXX4:
|
||||
do_xxx(4);
|
||||
break;
|
||||
|
||||
case PK_YYY:
|
||||
do_yyy();
|
||||
break;
|
||||
|
||||
case PK_POST:
|
||||
do_post();
|
||||
break;
|
||||
|
||||
case PK_NO_OP:
|
||||
break;
|
||||
|
||||
default:
|
||||
nout << "\nUnexpected command " << cmd << " encountered in PK file\n";
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
nout << "\n";
|
||||
|
||||
if (!_post) {
|
||||
nout << "Warning: did not encounter postamble.\n";
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
|
@ -0,0 +1,51 @@
|
|||
// Filename: pkFontFile.h
|
||||
// Created by: drose (18Feb01)
|
||||
//
|
||||
////////////////////////////////////////////////////////////////////
|
||||
|
||||
#ifndef PKFONTFILE_H
|
||||
#define PKFONTFILE_H
|
||||
|
||||
#include <pandatoolbase.h>
|
||||
|
||||
#include "fontFile.h"
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Class : PkFontFile
|
||||
// Description : A specialization on FontFile for reading TeX-style
|
||||
// .pk fonts.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
class PkFontFile : public FontFile {
|
||||
public:
|
||||
PkFontFile();
|
||||
|
||||
virtual bool read(const Filename &filename,
|
||||
bool extract_all, const string &extract_only);
|
||||
|
||||
private:
|
||||
unsigned int fetch_nibble();
|
||||
unsigned int fetch_packed_int();
|
||||
unsigned int fetch_byte();
|
||||
unsigned int fetch_int(int n = 4);
|
||||
int fetch_signed_int(int n = 4);
|
||||
bool do_character(int flag_byte);
|
||||
void do_xxx(int num_bytes);
|
||||
void do_yyy();
|
||||
void do_post();
|
||||
void do_pre();
|
||||
bool read_pk();
|
||||
|
||||
bool _post;
|
||||
bool _post_warning;
|
||||
int _p;
|
||||
bool _high;
|
||||
int _dyn_f;
|
||||
int _repeat_count;
|
||||
|
||||
bool _extract_all;
|
||||
string _extract_only;
|
||||
|
||||
vector<unsigned char> _pk;
|
||||
};
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,94 @@
|
|||
#!/bin/sh
|
||||
#
|
||||
# Converts from a TTF font file to an egg file and associated texture map
|
||||
# that is suitable for using with the TextNode class in Panda to render
|
||||
# text in the world.
|
||||
#
|
||||
# This script takes advantage of ttf2tfm and ttf2pk, two programs that
|
||||
# can be found in the freetype project--see www.freetype.org. Look
|
||||
# in the contrib subdirectory of freetype-1.3.1; it doesn't seem to exist
|
||||
# yet in freetype-2.0.
|
||||
#
|
||||
#
|
||||
# Usage:
|
||||
#
|
||||
# ttf2egg [opts] file.ttf file.egg -- [mkfont-opts]
|
||||
#
|
||||
# Options that control the behavior of this script must appear first.
|
||||
# The extra options options following the first two parameters are passed
|
||||
# unchanged to egg-mkfont.
|
||||
#
|
||||
# Local options:
|
||||
#
|
||||
# -d dpi
|
||||
# Specify the resolution at which to rasterize the font before
|
||||
# converting it. This affects the size of the generated texture
|
||||
# image and, in turn, the clarity of the resulting font. The
|
||||
# default is 720, which generally seems to be a good ratio.
|
||||
#
|
||||
# -T file.enc
|
||||
# Specify the name and/or location of the encoding file to use
|
||||
# to convert the glyphs from the TTF font. A couple of suitable
|
||||
# files are provided with ttf2tfm; most of the time, you will
|
||||
# want to use T1-WGL4.enc.
|
||||
#
|
||||
# See egg-mkfont -h for a description of the additional options.
|
||||
#
|
||||
#ENDCOMMENT
|
||||
|
||||
showhelp=
|
||||
dpi=720
|
||||
enc=$PANDATOOL/shared/T1-WGL4.enc
|
||||
while getopts "d:T:h" flag; do
|
||||
case $flag in
|
||||
d) dpi="$OPTARG";;
|
||||
T) enc="$OPTARG";;
|
||||
h) showhelp=y;;
|
||||
\?) exit 1;
|
||||
esac
|
||||
done
|
||||
|
||||
if [ -z "$1" -o -z "$2" -o "$showhelp" ]; then
|
||||
sed '/#ENDCOMMENT/,$d' <$0 >&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
shift `expr $OPTIND - 1`
|
||||
|
||||
ttf=$1
|
||||
egg=$2
|
||||
|
||||
# Perform some sanity checks on input parameters.
|
||||
|
||||
if [ `basename $ttf .ttf` = `basename $ttf` -a `basename $ttf .TTF` = `basename $ttf` ]; then
|
||||
echo "$ttf should end in .ttf or .TTF"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
if [ `basename $egg .egg` = `basename $egg` ]; then
|
||||
echo "$egg should end in .egg"
|
||||
exit 1
|
||||
fi
|
||||
|
||||
fontname=`basename $egg .egg`
|
||||
shift 2
|
||||
|
||||
if [ "x$1" = "x--" ]; then
|
||||
shift
|
||||
fi
|
||||
|
||||
rm -f ttfonts1.map
|
||||
echo ttf2tfm $ttf -q -u -T \"$enc\" $fontname.tfm
|
||||
if ttf2tfm $ttf -q -u -T "$enc" $fontname.tfm > ttfonts1.map 2>/dev/null; then
|
||||
rm -f ttfonts.map
|
||||
tail -1 ttfonts1.map >ttfonts.map
|
||||
echo ttf2pk -q $fontname $dpi
|
||||
if ttf2pk -q $fontname $dpi >/dev/null 2>/dev/null; then
|
||||
echo egg-mkfont -p 0 $* -o $egg $fontname.${dpi}pk
|
||||
egg-mkfont -p 0 $* -o $egg $fontname.${dpi}pk
|
||||
fi
|
||||
fi
|
||||
status=$?
|
||||
|
||||
rm -f ttfonts1.map ttfonts.map $fontname.tfm $fontname.${dpi}pk
|
||||
exit $status
|
||||
|
|
@ -16,6 +16,7 @@
|
|||
#include <coordinateSystem.h>
|
||||
#include <dconfig.h>
|
||||
#include <config_dconfig.h>
|
||||
#include <string_utils.h>
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <algorithm>
|
||||
|
|
@ -547,17 +548,9 @@ dispatch_count(const string &, const string &, void *var) {
|
|||
////////////////////////////////////////////////////////////////////
|
||||
bool ProgramBase::
|
||||
dispatch_int(const string &opt, const string &arg, void *var) {
|
||||
if (arg.empty()) {
|
||||
nout << "-" << opt << " requires an integer parameter.\n";
|
||||
return false;
|
||||
}
|
||||
|
||||
int *ip = (int *)var;
|
||||
const char *arg_str = arg.c_str();
|
||||
char *endptr;
|
||||
(*ip) = strtol(arg_str, &endptr, 0);
|
||||
|
||||
if (*endptr != '\0') {
|
||||
if (!string_to_int(arg, *ip)) {
|
||||
nout << "Invalid integer parameter for -" << opt << ": "
|
||||
<< arg << "\n";
|
||||
return false;
|
||||
|
|
@ -575,40 +568,21 @@ dispatch_int(const string &opt, const string &arg, void *var) {
|
|||
////////////////////////////////////////////////////////////////////
|
||||
bool ProgramBase::
|
||||
dispatch_int_pair(const string &opt, const string &arg, void *var) {
|
||||
if (arg.empty()) {
|
||||
nout << "-" << opt
|
||||
<< " requires an pair of integers separated by a comma.\n";
|
||||
return false;
|
||||
}
|
||||
|
||||
size_t comma = arg.find(',');
|
||||
if (comma == string::npos) {
|
||||
nout << "-" << opt
|
||||
<< " requires an pair of integers separated by a comma.\n";
|
||||
return false;
|
||||
}
|
||||
|
||||
string first = arg.substr(0, comma);
|
||||
string second = arg.substr(comma + 1);
|
||||
|
||||
int *ip = (int *)var;
|
||||
char *endptr;
|
||||
|
||||
const char *first_str = first.c_str();
|
||||
ip[0] = strtol(first_str, &endptr, 0);
|
||||
vector_string words;
|
||||
tokenize(arg, words, ",");
|
||||
|
||||
if (*endptr != '\0') {
|
||||
nout << "Invalid integer parameter for -" << opt << ": "
|
||||
<< first << "\n";
|
||||
return false;
|
||||
bool okflag = false;
|
||||
if (words.size() == 2) {
|
||||
okflag =
|
||||
string_to_int(words[0], ip[0]) &&
|
||||
string_to_int(words[1], ip[1]);
|
||||
}
|
||||
|
||||
const char *second_str = second.c_str();
|
||||
ip[1] = strtol(second_str, &endptr, 0);
|
||||
|
||||
if (*endptr != '\0') {
|
||||
nout << "Invalid integer parameter for -" << opt << ": "
|
||||
<< second << "\n";
|
||||
if (!okflag) {
|
||||
nout << "-" << opt
|
||||
<< " requires a pair of integers separated by a comma.\n";
|
||||
return false;
|
||||
}
|
||||
|
||||
|
|
@ -624,19 +598,144 @@ dispatch_int_pair(const string &opt, const string &arg, void *var) {
|
|||
////////////////////////////////////////////////////////////////////
|
||||
bool ProgramBase::
|
||||
dispatch_double(const string &opt, const string &arg, void *var) {
|
||||
if (arg.empty()) {
|
||||
nout << "-" << opt << " requires a floating-point parameter.\n";
|
||||
double *ip = (double *)var;
|
||||
|
||||
if (!string_to_double(arg, *ip)) {
|
||||
nout << "Invalid numeric parameter for -" << opt << ": "
|
||||
<< arg << "\n";
|
||||
return false;
|
||||
}
|
||||
|
||||
double *ip = (double *)var;
|
||||
const char *arg_str = arg.c_str();
|
||||
char *endptr;
|
||||
(*ip) = strtod(arg_str, &endptr);
|
||||
return true;
|
||||
}
|
||||
|
||||
if (*endptr != '\0') {
|
||||
nout << "Invalid floating-point parameter for -" << opt << ": "
|
||||
<< arg << "\n";
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: ProgramBase::dispatch_double_pair
|
||||
// Access: Protected, Static
|
||||
// Description: Standard dispatch function for an option that takes
|
||||
// a pair of double parameters. The data pointer is to
|
||||
// an array of two doubles.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
bool ProgramBase::
|
||||
dispatch_double_pair(const string &opt, const string &arg, void *var) {
|
||||
double *ip = (double *)var;
|
||||
|
||||
vector_string words;
|
||||
tokenize(arg, words, ",");
|
||||
|
||||
bool okflag = false;
|
||||
if (words.size() == 2) {
|
||||
okflag =
|
||||
string_to_double(words[0], ip[0]) &&
|
||||
string_to_double(words[1], ip[1]);
|
||||
}
|
||||
|
||||
if (!okflag) {
|
||||
nout << "-" << opt
|
||||
<< " requires a pair of numbers separated by a comma.\n";
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: ProgramBase::dispatch_double_triple
|
||||
// Access: Protected, Static
|
||||
// Description: Standard dispatch function for an option that takes
|
||||
// a triple of double parameters. The data pointer is to
|
||||
// an array of three doubles.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
bool ProgramBase::
|
||||
dispatch_double_triple(const string &opt, const string &arg, void *var) {
|
||||
double *ip = (double *)var;
|
||||
|
||||
vector_string words;
|
||||
tokenize(arg, words, ",");
|
||||
|
||||
bool okflag = false;
|
||||
if (words.size() == 3) {
|
||||
okflag =
|
||||
string_to_double(words[0], ip[0]) &&
|
||||
string_to_double(words[1], ip[1]) &&
|
||||
string_to_double(words[2], ip[2]);
|
||||
}
|
||||
|
||||
if (!okflag) {
|
||||
nout << "-" << opt
|
||||
<< " requires three numbers separated by commas.\n";
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: ProgramBase::dispatch_double_quad
|
||||
// Access: Protected, Static
|
||||
// Description: Standard dispatch function for an option that takes
|
||||
// a quad of double parameters. The data pointer is to
|
||||
// an array of four doubles.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
bool ProgramBase::
|
||||
dispatch_double_quad(const string &opt, const string &arg, void *var) {
|
||||
double *ip = (double *)var;
|
||||
|
||||
vector_string words;
|
||||
tokenize(arg, words, ",");
|
||||
|
||||
bool okflag = false;
|
||||
if (words.size() == 4) {
|
||||
okflag =
|
||||
string_to_double(words[0], ip[0]) &&
|
||||
string_to_double(words[1], ip[1]) &&
|
||||
string_to_double(words[2], ip[2]) &&
|
||||
string_to_double(words[3], ip[3]);
|
||||
}
|
||||
|
||||
if (!okflag) {
|
||||
nout << "-" << opt
|
||||
<< " requires four numbers separated by commas.\n";
|
||||
return false;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////
|
||||
// Function: ProgramBase::dispatch_color
|
||||
// Access: Protected, Static
|
||||
// Description: Standard dispatch function for an option that takes a
|
||||
// color, either as r,g,b or as r,g,b,a. The data
|
||||
// pointer is to an array of four doubles, e.g. a
|
||||
// Colord.
|
||||
////////////////////////////////////////////////////////////////////
|
||||
bool ProgramBase::
|
||||
dispatch_color(const string &opt, const string &arg, void *var) {
|
||||
double *ip = (double *)var;
|
||||
|
||||
vector_string words;
|
||||
tokenize(arg, words, ",");
|
||||
|
||||
bool okflag = false;
|
||||
if (words.size() == 4) {
|
||||
okflag =
|
||||
string_to_double(words[0], ip[0]) &&
|
||||
string_to_double(words[1], ip[1]) &&
|
||||
string_to_double(words[2], ip[2]) &&
|
||||
string_to_double(words[3], ip[3]);
|
||||
|
||||
} else if (words.size() == 3) {
|
||||
okflag =
|
||||
string_to_double(words[0], ip[0]) &&
|
||||
string_to_double(words[1], ip[1]) &&
|
||||
string_to_double(words[2], ip[2]);
|
||||
ip[3] = 1.0;
|
||||
}
|
||||
|
||||
if (!okflag) {
|
||||
nout << "-" << opt
|
||||
<< " requires three or four numbers separated by commas.\n";
|
||||
return false;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -64,6 +64,10 @@ protected:
|
|||
static bool dispatch_int(const string &opt, const string &arg, void *var);
|
||||
static bool dispatch_int_pair(const string &opt, const string &arg, void *var);
|
||||
static bool dispatch_double(const string &opt, const string &arg, void *var);
|
||||
static bool dispatch_double_pair(const string &opt, const string &arg, void *var);
|
||||
static bool dispatch_double_triple(const string &opt, const string &arg, void *var);
|
||||
static bool dispatch_double_quad(const string &opt, const string &arg, void *var);
|
||||
static bool dispatch_color(const string &opt, const string &arg, void *var);
|
||||
static bool dispatch_string(const string &opt, const string &arg, void *var);
|
||||
static bool dispatch_filename(const string &opt, const string &arg, void *var);
|
||||
static bool dispatch_search_path(const string &opt, const string &arg, void *var);
|
||||
|
|
|
|||
Loading…
Reference in New Issue