ref: dae5a44111dfb21a714824a5cec2abee4f9f9080
dir: /sys/src/cmd/postscript/postbgi/postbgi.h/
/* * * BGI opcodes. * */ #define BRCHAR 033 /* rotated character mode */ #define BCHAR 034 /* graphical character mode */ #define BGRAPH 035 /* graphical master mode */ #define BSUB 042 /* subroutine definition */ #define BRET 043 /* end of subroutine */ #define BCALL 044 /* subroutine call */ #define BEND 045 /* end page */ #define BERASE 046 /* erase - obsolete */ #define BREP 047 /* repeat */ #define BENDR 050 /* end repeat */ #define BSETX 051 /* set horizontal position */ #define BSETY 052 /* set vertical position */ #define BSETXY 053 /* set horizontal and vertical positions */ #define BINTEN 054 /* intensify - mark current pixel */ #define BVISX 055 /* manhattan vector - change x first */ #define BINVISX 056 /* same as BVISX but nothing drawn */ #define BVISY 057 /* manhattan vector - change y first */ #define BINVISY 060 /* same as BVISY but nothing drawn */ #define BVEC 061 /* arbitrary long vector */ #define BSVEC 062 /* arbitrary short vector */ #define BRECT 063 /* outline rectangle */ #define BPOINT1 064 /* point plot - mode 1 */ #define BPOINT 065 /* point plot - mode 2 */ #define BLINE 066 /* line plot */ #define BCSZ 067 /* set character size */ #define BLTY 070 /* select line type */ #define BARC 071 /* draw circular arc */ #define BFARC 072 /* filled circular arc */ #define BFRECT 073 /* filled rectangle */ #define BRASRECT 074 /* raster rectangle */ #define BCOL 075 /* select color */ #define BFTRAPH 076 /* filled trapezoid */ #define BPAT 077 /* pattern are for filling - no info */ #define BNOISE 0 /* from bad file format */ /* * * Character size is controlled by the spacing of dots in a 5x7 dot matrix, which * by default is set to BGISIZE. * */ #define BGISIZE 2 /* default character grid spacing */ /* * * Definitions used to decode the bytes read from a BGI file. * */ #define CHMASK 0177 /* characters only use 7 bits */ #define DMASK 077 /* data values use lower 6 bits */ #define MSB 0100 /* used to check for data or opcode */ #define SGNB 040 /* sign bit for integers */ #define MSBMAG 037 /* mag of most sig byte in a BGI int */ /* * * Descriptions of BGI vectors and what's done when they're drawn. * */ #define X_COORD 0 /* change x next in manhattan vector */ #define Y_COORD 1 /* same but y change comes next */ #define LONGVECTOR 2 /* arbitrary long vector */ #define SHORTVECTOR 3 /* components given in 6 bits */ #define VISIBLE 0 /* really draw the vector */ #define INVISIBLE 1 /* just move the current position */ /* * * What's done with a closed path. * */ #define OUTLINE 0 /* outline the defined path */ #define FILL 1 /* fill it in */ /* * * BGI line style definitions. They're used as an index into the STYLES array, * which really belongs in the prologue. * */ #define SOLID 0 #define DOTTED 1 #define SHORTDASH 2 #define DASH 3 #define LONGDASH 4 #define DOTDASH 5 #define THREEDOT 6 #define STYLES \ \ { \ "[]", \ "[.5 2]", \ "[2 4]", \ "[4 4]", \ "[8 4]", \ "[.5 2 4 2]", \ "[.5 2 .5 2 .5 2 4 2]" \ } /* * * Three constants used to choose which component (RED, GREEN, or BLUE) we're * interested in. BGI colors are specified as a single data byte and pulling a * particular component out of the BGI color byte is handled by procedure * get_color(). * */ #define RED 0 #define GREEN 1 #define BLUE 2 /* * * An array of type Disp is used to save the horizontal and vertical displacements * that result after a subroutine has been called. Needed so we can properly adjust * our horizontal and vertical positions after a subroutine call. Entries are made * immediately after a subroutine is defined and used after the call. Subroutine * names are integers that range from 0 to 63 (assigned in the BG file) and the * name is used as an index into the Disp array when we save or retrieve the * displacement. * */ typedef struct { int dx; /* horizontal and */ int dy; /* vertical displacements */ } Disp; /* * * An array of type Fontmap helps convert font names requested by users into * legitimate PostScript names. The array is initialized using FONTMAP, which must * end with and entry that has NULL defined as its name field. * */ typedef struct { char *name; /* user's font name */ char *val; /* corresponding PostScript name */ } Fontmap; #define FONTMAP \ \ { \ "R", "Courier", \ "I", "Courier-Oblique", \ "B", "Courier-Bold", \ "CO", "Courier", \ "CI", "Courier-Oblique", \ "CB", "Courier-Bold", \ "CW", "Courier", \ "PO", "Courier", \ "courier", "Courier", \ "cour", "Courier", \ "co", "Courier", \ NULL, NULL \ } /* * * Two macros that are useful in processing BGI files: * * MAG(A, B) - Takes bytes A and B which have been read from a BGI file * and returns the magnitude of the integer represented by * the two bytes. * * LINESPACE(A) - Takes BGI size A and returns the number of address units * that can be used for a reasonable interline spacing. * */ #define MAG(A, B) (((A & MSBMAG) << 6) | (B & DMASK)) #define LINESPACE(A) (8 * A) /* * * Some of the non-integer valued functions in postdmd.c. * */ char *get_font();