X-Git-Url: http://git.asbjorn.biz/?a=blobdiff_plain;f=pdf2swf%2Fttf2pt1%2Fbdf.c;fp=pdf2swf%2Fttf2pt1%2Fbdf.c;h=9f6c72720f1cec4b954c689fc95137474a1389b1;hb=a1ccd7453235d75b1caffc9f0b83912b48a0ca8c;hp=0000000000000000000000000000000000000000;hpb=710c9cd13c2d123aca6720b92a7ef5051daceeb2;p=swftools.git diff --git a/pdf2swf/ttf2pt1/bdf.c b/pdf2swf/ttf2pt1/bdf.c new file mode 100644 index 0000000..9f6c727 --- /dev/null +++ b/pdf2swf/ttf2pt1/bdf.c @@ -0,0 +1,660 @@ +/* + * The font parser for the BDF files + * + * Copyright (c) 2001 by the TTF2PT1 project + * Copyright (c) 2001 by Sergey Babkin + * + * see COPYRIGHT for the full copyright notice + */ + +#include +#include +#include +#include +#include "pt1.h" +#include "global.h" + +/* prototypes of call entries */ +static void openfont(char *fname, char *arg); +static void closefont( void); +static int getnglyphs ( void); +static int glnames( GLYPH *glyph_list); +static void readglyphs( GLYPH *glyph_list); +static int glenc( GLYPH *glyph_list, int *encoding, int *unimap); +static void fnmetrics( struct font_metrics *fm); +static void glpath( int glyphno, GLYPH *glyph_list); +static void kerning( GLYPH *glyph_list); + +/* globals */ + +/* front-end descriptor */ +struct frontsw bdf_sw = { + /*name*/ "bdf", + /*descr*/ "BDF bitmapped fonts", + /*suffix*/ { "bdf" }, + /*open*/ openfont, + /*close*/ closefont, + /*nglyphs*/ getnglyphs, + /*glnames*/ glnames, + /*glmetrics*/ readglyphs, + /*glenc*/ glenc, + /*fnmetrics*/ fnmetrics, + /*glpath*/ glpath, + /*kerning*/ kerning, +}; + +/* statics */ + +#define MAXLINE 10240 /* maximal line length in the input file */ + +static int lineno; /* line number */ + +#define GETLEN(s) s, (sizeof(s)-1) +#define LENCMP(str, txt) strncmp(str, txt, sizeof(txt)-1) + +static FILE *bdf_file; +static int nglyphs; +static struct font_metrics fmet; + +/* many BDF fonts are of small pixel size, so we better try + * to scale them by an integer to keep the dimensions in + * whole pixels. However if the size is too big and a non- + * integer scaling is needed, we use the standard ttf2pt1's + * scaling abilities. + */ +static int pixel_size; +static int scale; +static int scale_external; + +static char *slant; +static char xlfdname[201]; +static char *spacing; +static char *charset_reg; +static char *charset_enc; +static char *fnwidth; +static int is_unicode = 0; + +/* tempoary storage for returning data to ttf2pt1 later on request */ +static int maxenc = 0; +static int *fontenc; +static GENTRY **glpaths; + +static int got_glyphs = 0; +static GLYPH *glyphs; +static int curgl; + +static int readfile(FILE *f, int (*strfunc)(int len, char *str)); + +/* + * Read the file and parse each string with strfunc(), + * until strfunc() returns !=0 or the end of file happens. + * Returns -1 on EOF or strfunc() returning <0, else 0 + */ + +static int +readfile( + FILE *f, + int (*strfunc)(int len, char *str) +) +{ + static char str[MAXLINE]; /* input line, maybe should be dynamic ? */ + char *s; + int len, c, res; + + len=0; + while(( c=getc(f) )!=EOF) { + if(c=='\n') { + str[len]=0; + + res = strfunc(len, str); + lineno++; + if(res<0) + return -1; + else if(res!=0) + return 0; + + len=0; + } else if(len%d)\n", lineno, MAXLINE-1); + exit(1); + } + } + return -1; /* EOF */ +} + +/* + * Parse the header of the font file. + * Stop after the line CHARS is encountered. Ignore the unknown lines. + */ + +struct line { + char *name; /* property name with trailing space */ + int namelen; /* length of the name string */ + enum { + ALLOW_REPEAT = 0x01, /* this property may be repeated in multiple lines */ + IS_SEEN = 0x02, /* this property has been seen already */ + MUST_SEE = 0x04, /* this property must be seen */ + IS_LAST = 0x08 /* this is the last property to be read */ + } flags; + char *fmt; /* format string for the arguments, NULL means a string arg */ + int nvals; /* number of values to be read by sscanf */ + void *vp[4]; /* pointers to values to be read */ +}; + +static struct line header[] = { + { GETLEN("FONT "), 0, " %200s", 1, {&xlfdname} }, + { GETLEN("SIZE "), MUST_SEE, " %d", 1, {&pixel_size} }, + { GETLEN("FONTBOUNDINGBOX "), MUST_SEE, " %hd %hd %hd %hd", 4, + {&fmet.bbox[2], &fmet.bbox[3], &fmet.bbox[0], &fmet.bbox[1]} }, + { GETLEN("FAMILY_NAME "), MUST_SEE, NULL, 1, {&fmet.name_family} }, + { GETLEN("WEIGHT_NAME "), MUST_SEE, NULL, 1, {&fmet.name_style} }, + { GETLEN("COPYRIGHT "), 0, NULL, 1, {&fmet.name_copyright} }, + { GETLEN("SLANT "), MUST_SEE, NULL, 1, {&slant} }, + { GETLEN("SPACING "), 0, NULL, 1, {&spacing} }, + { GETLEN("SETWIDTH_NAME "), 0, NULL, 1, {&fnwidth} }, + { GETLEN("CHARSET_REGISTRY "), 0, NULL, 1, {&charset_reg} }, + { GETLEN("CHARSET_ENCODING "), 0, NULL, 1, {&charset_enc} }, + { GETLEN("FONT_ASCENT "), 0, " %hd", 1, {&fmet.ascender} }, + { GETLEN("FONT_DESCENT "), 0, " %hd", 1, {&fmet.descender} }, + + /* these 2 must go in this order for post-processing */ + { GETLEN("UNDERLINE_THICKNESS "), 0, " %hd", 1, {&fmet.underline_thickness} }, + { GETLEN("UNDERLINE_POSITION "), 0, " %hd", 1, {&fmet.underline_position} }, + + { GETLEN("CHARS "), MUST_SEE|IS_LAST, " %d", 1, {&nglyphs} }, + { NULL, 0, 0 } /* end mark: name==NULL */ +}; + +static int +handle_header( + int len, + char *str +) +{ + struct line *cl; + char *s, *p; + int c; + +#if 0 + fprintf(stderr, "line: %s\n", str); +#endif + for(cl = header; cl->name != 0; cl++) { + if(strncmp(str, cl->name, cl->namelen)) + continue; +#if 0 + fprintf(stderr, "match: %s\n", cl->name); +#endif + if(cl->flags & IS_SEEN) { + if(cl->flags & ALLOW_REPEAT) + continue; + + fprintf(stderr, "**** input line %d redefines the property %s\n", lineno, cl->name); + exit(1); + } + cl->flags |= IS_SEEN; + if(cl->fmt == 0) { + s = malloc(len - cl->namelen + 1); + if(s == 0) { + fprintf (stderr, "****malloc failed %s line %d\n", __FILE__, __LINE__); + exit(255); + } + *((char **)(cl->vp[0])) = s; + + /* skip until a quote */ + for(p = str+cl->namelen; (c = *p)!=0; p++) { + if(c == '"') { + p++; + break; + } + } + for(; (c = *p)!=0; p++) { + if(c == '"') { + c = *++p; + if(c == '"') + *s++ = c; + else + break; + } else + *s++ = c; + } + *s = 0; /* end of line */ + } else { + c = sscanf(str+cl->namelen, cl->fmt, cl->vp[0], cl->vp[1], cl->vp[2], cl->vp[3]); + if(c != cl->nvals) { + fprintf(stderr, "**** property %s at input line %d must have %d arguments\n", + cl->name, lineno, cl->nvals); + exit(1); + } + } + if(cl->flags & IS_LAST) + return 1; + else + return 0; + } + return 0; +} + +/* + * Parse the description of the glyphs + */ + +static int +handle_glyphs( + int len, + char *str +) +{ + static int inbmap=0; + static char *bmap; + static int xsz, ysz, xoff, yoff; + static int curln; + int i, c; + char *p, *plim, *psz; + + if(!LENCMP(str, "ENDFONT")) { + if(curgl < nglyphs) { + fprintf(stderr, "**** unexpected end of font file after %d glyphs\n", curgl); + exit(1); + } else + return 1; + } + if(curgl >= nglyphs) { + fprintf(stderr, "**** file contains more glyphs than advertised (%d)\n", nglyphs); + exit(1); + } + if(!LENCMP(str, "STARTCHAR")) { + /* sizeof will count \0 instead of ' ' */ + for(i=sizeof("STARTCHAR"); str[i] == ' '; i++) + {} + + glyphs[curgl].name = strdup(str + i); + if(glyphs[curgl].name == 0) { + fprintf (stderr, "****malloc failed %s line %d\n", __FILE__, __LINE__); + exit(255); + } + } else if(!LENCMP(str, "ENCODING")) { + if(sscanf(str, "ENCODING %d", &fontenc[curgl])!=1) { + fprintf(stderr,"**** weird ENCODING statement at line %d\n", lineno); + exit(1); + } + if(fontenc[curgl] == -1) /* compatibility format */ + sscanf(str, "ENCODING -1 %d", &fontenc[curgl]); + if(fontenc[curgl] > maxenc) + maxenc = fontenc[curgl]; + } else if(!LENCMP(str, "DWIDTH")) { + if(sscanf(str, "DWIDTH %d %d", &xsz, &ysz)!=2) { + fprintf(stderr,"**** weird DWIDTH statement at line %d\n", lineno); + exit(1); + } + glyphs[curgl].width = xsz*scale; + } else if(!LENCMP(str, "BBX")) { + if(sscanf(str, "BBX %d %d %d %d", &xsz, &ysz, &xoff, &yoff)!=4) { + fprintf(stderr,"**** weird BBX statement at line %d\n", lineno); + exit(1); + } + bmap=malloc(xsz*ysz); + if(bmap==0) { + fprintf (stderr, "****malloc failed %s line %d\n", __FILE__, __LINE__); + exit(255); + } + glyphs[curgl].lsb = -xoff*scale; + glyphs[curgl].xMin = -xoff*scale; + glyphs[curgl].xMax = (xsz-xoff)*scale; + glyphs[curgl].yMin = -yoff*scale; + glyphs[curgl].yMax = (ysz-xoff)*scale; + } else if(!LENCMP(str, "BITMAP")) { + inbmap=1; + curln=ysz-1; /* the lowest line has index 0 */ + } else if(!LENCMP(str, "ENDCHAR")) { + inbmap=0; + if(bmap) { + glyphs[curgl].lastentry = 0; + glyphs[curgl].path = 0; + glyphs[curgl].entries = 0; + bmp_outline(&glyphs[curgl], scale, bmap, xsz, ysz, xoff, yoff); + free(bmap); + /* remember in a static table or it will be erased */ + glpaths[curgl] = glyphs[curgl].entries; + glyphs[curgl].entries = 0; + + if(glpaths[curgl]) + glyphs[curgl].ttf_pathlen = 1; + else + glyphs[curgl].ttf_pathlen = 0; + } + curgl++; + } else if(inbmap) { + if(curln<0) { + fprintf(stderr,"**** bitmap is longer than %d lines at line %d\n", ysz, lineno); + exit(1); + } + + i=0; + p=&bmap[curln*xsz]; psz=p+xsz; + while(ilsb = 0; + g->width = fmet.bbox[2]; + g->xMin = 0; + g->yMin = 0; + } + g = &glyphs[0]; + g->name = ".notdef"; + g->xMax = fmet.bbox[2]*4/5; + g->yMax = fmet.bbox[3]*4/5; + g->entries = g->path = g->lastentry = 0; + /* make it look as a black square */ + fg_rmoveto(g, 0.0, 0.0); + fg_rlineto(g, 0.0, (double)g->yMax); + fg_rlineto(g, (double)g->xMax, (double)g->yMax); + fg_rlineto(g, (double)g->xMax, 0.0); + fg_rlineto(g, 0.0, 0.0); + g_closepath(g); + glpaths[0] = g->entries; + g->entries = 0; + g->ttf_pathlen = 4; + + g = &glyphs[1]; + g->name = ".null"; + g->xMax = g->yMax = 0; + g->ttf_pathlen = 0; + + if(readfile(bdf_file, handle_glyphs) < 0) { + fprintf(stderr, "**** file does not contain the ENDFONT line\n"); + exit(1); + } + got_glyphs = 1; +} + +/* + * Open font and prepare to return information to the main driver. + * May print error and warning messages. + * Exit on error. + */ + +static void +openfont( + char *fname, + char *arg /* unused now */ +) +{ + struct line *cl; + int i, l; + + if ((bdf_file = fopen(fname, "r")) == NULL) { + fprintf(stderr, "**** Cannot open file '%s'\n", fname); + exit(1); + } else { + WARNING_2 fprintf(stderr, "Processing file %s\n", fname); + } + + lineno = 1; + + for(cl = header; cl->name != 0; cl++) + cl->flags &= ~IS_SEEN; + if(readfile(bdf_file, handle_header) < 0) { + fprintf(stderr, "**** file does not contain the CHARS definition\n"); + exit(1); + } + for(cl = header; cl->name != 0; cl++) { + if( (cl->flags & MUST_SEE) && !(cl->flags & IS_SEEN) ) { + fprintf(stderr, "**** mandatory property %sis not found in the input line\n", + cl->name); /* cl->name has a space at the end */ + exit(1); + } + + /* set a few defaults */ + if( !(cl->flags & IS_SEEN) ) { + if(cl->vp[0] == &fmet.underline_thickness) { + fmet.underline_thickness = 1; + } else if(cl->vp[0] == &fmet.underline_position) { + fmet.underline_position = fmet.bbox[1] + fmet.underline_thickness + - (pixel_size - fmet.bbox[3]); + } else if(cl->vp[0] == &fmet.ascender) { + fmet.ascender = fmet.bbox[2] + fmet.bbox[0]; + } else if(cl->vp[0] == &fmet.descender) { + fmet.descender = fmet.bbox[0]; + } + } + } + + nglyphs += 2; /* add empty glyph and .notdef */ + + /* postprocessing to compensate for the differences in the metric formats */ + fmet.bbox[2] += fmet.bbox[0]; + fmet.bbox[3] += fmet.bbox[1]; + + scale = 1000/pixel_size; /* XXX ? */ + if(scale*pixel_size < 950) { + scale = 1; + scale_external = 1; + fmet.units_per_em = pixel_size; + } else { + scale_external = 0; + fmet.units_per_em = scale*pixel_size; + + fmet.underline_position *= scale; + fmet.underline_thickness *= scale; + fmet.ascender *= scale; + fmet.descender *= scale; + for(i=0; i<4; i++) + fmet.bbox[i] *= scale; + } + + fmet.italic_angle = 0.0; + if(spacing == 0 /* possibly an old font */ + || toupper(spacing[0]) != 'P') /* or anything non-proportional */ + fmet.is_fixed_pitch = 1; + else + fmet.is_fixed_pitch = 0; + + if(fmet.name_copyright==NULL) + fmet.name_copyright = ""; + + /* create the full name */ + l = strlen(fmet.name_family) + + (fmet.name_style? strlen(fmet.name_style) : 0) + + (fnwidth? strlen(fnwidth) : 0) + + strlen("Oblique") + 1; + + if(( fmet.name_full = malloc(l) )==NULL) { + fprintf (stderr, "****malloc failed %s line %d\n", __FILE__, __LINE__); + exit(255); + } + strcpy(fmet.name_full, fmet.name_family); + if(fnwidth && strcmp(fnwidth, "Normal")) { + strcat(fmet.name_full, fnwidth); + } + if(fmet.name_style && strcmp(fmet.name_style, "Medium")) { + strcat(fmet.name_full, fmet.name_style); + } + switch(toupper(slant[0])) { + case 'O': + strcat(fmet.name_full, "Oblique"); + break; + case 'I': + strcat(fmet.name_full, "Italic"); + break; + } + + fmet.name_ps = fmet.name_full; + fmet.name_version = "1.0"; + + if(charset_reg && charset_enc + && !strcmp(charset_reg, "iso10646") && !strcmp(charset_enc, "1")) + is_unicode = 1; + + if(( fontenc = calloc(nglyphs, sizeof *fontenc) )==NULL) { + fprintf (stderr, "****malloc failed %s line %d\n", __FILE__, __LINE__); + exit(255); + } + for(i=0; i=0 && e 255) + return 2; + else + return 0; +} + +/* + * Get the font metrics + */ +static void +fnmetrics( + struct font_metrics *fm +) +{ + *fm = fmet; +} + +/* + * Get the path of contrours for a glyph. + */ + +static void +glpath( + int glyphno, + GLYPH *glyf_list +) +{ + readglyphs(glyf_list); + glyf_list[glyphno].entries = glpaths[glyphno]; + glpaths[glyphno] = 0; +} + +/* + * Get the kerning data. + */ + +static void +kerning( + GLYPH *glyph_list +) +{ + return; /* no kerning in BDF */ +}