/*========================================================================*\ Copyright (c) 1999 Nicolai Langfeldt Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL NICOLAI LANGFELDT, PAUL VOJTA, OR ANYONE ELSE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Names: janl: Nicolai Langfeldt (janl@math.uio.no) rmz: Rainer Menzner (Rainer.Menzner@neuroinformatik.ruhr-uni-bochum.de) History: 18/02/1999, janl: Initial version, first public alpha release of xdvi-t1. 22/02/1999, rmz: Changes to make scaling and antialiasing work better. 24/02/1999, janl: Read afm files to get alignments right. type1 char widhts are to coarse. 08/05/1999, janl: Update to t1lib-0.9, add code to read more generic encoding maps (encoding.map, not *.enc) 10/05/1999, janl: New font loading code and data struct for defered font loading. Significant reduction in startup time realized. Bugs: - Every kpse_find_file call presents a memory leak. The pathname buffer is not freed. \*========================================================================*/ #define HAVE_BOOLEAN 1 #include "xdvi-config.h" #if T1 #define PRIVATE static #define PUBLIC #if defined(HAVE_STRING_H) #include #else extern char *strtok P2H(char *, const char *); #endif #include "dvi.h" #include #include #include /* Datastructures: encodings[n]: Loaded from map file [0] = 8r, [1] = 8c, The vectors are demand-loaded in 'load_encoded_font' */ typedef struct encoding { char *enc; /* This may be NULL. From dvips maps we get encodings loaded by filename, and no name given */ char *file; char **vector; } encoding; PRIVATE encoding *encodings; /* Dynamic array */ #define ENCSTART 16 /* Start size. Normaly there will not be even this many. */ #define ENCGROW 16 /* Grow by, when full */ PRIVATE int maxenc=ENCSTART-1; /* Current size of array */ PRIVATE int enclidx=-1; /* Current last index in array */ /* t1fonts[n]: Built as xdvi loads t1 fonts idx file short t1id loaded [0] = /path/cmr10.pfb, cmr10 0 1 [1] = /path/prmr.pfa, prmr 1 0 [2] = /path/pcrr8a.pfa, pcrr8a 2 0 This array enumerates the loaded t1 fonts by full path name. The refered to t1id is the t1lib font id. The font will not be extended/slanted/encoded. The loaded field indicates if T1_LoadFont has been called for the font yet. texfonts that need a modified version of the t1 font must use T1_CopyFont to copy the raw font and obtain the id of a new t1 font which can then be modified. As described in the t1 docs a font must be loaded before it can be copied. Fonts that are copies of other fonts have NULL filenames. If any font files are to be reused based on the file name the raw font must be reused, not a copy. The short field contains the font as it was identified in the fontmap. This is used to save searching; if two fonts are identified the same way in the fontmap they the same font. */ typedef struct t1font { char *file; char *shortname; int t1id; int loaded; } t1font; PRIVATE t1font *t1fonts; /* Dynamic array */ #define T1START 2048 /* Japanese, Chineese, Korean and others use a lot of fonts */ #define T1GROW 1024 PRIVATE int maxt1=T1START-1; PRIVATE int t1lidx=-1; /* fontmaps[n]: Loaded from map file, and extended with 'implied' fonts as needed. idx texname enc exten. slant filena. t1libid pathn. tfmidx [0] = pcrr8rn 0 750 0 pcrr8a 2 ... 2 [1] = putro8r 0 0 0 putro8r 3 ... 3 The first 5 fields of this table are loaded from the font map files, or filled out with default values when implied fonts are set-up. The t1libid is -1 until the font is loaded or copied as described under t1fonts. Once the dvi file reveals that the font is needed it is located on disk to ensure it exists, and the pathname field is filled out. The t1 font is not loaded, or copied, before it's needed because set_t1_char has been called to draw a glyph from the font. The late loading is necessiated by the high cost of loading fonts. If the font loading is concentrated at startup of the program the startup-time becomes ecessively high due to the high number of fonts used by any normaly LaTeX-document. 0 extention and slant means no extention/slant. If the input values are decimal (less than 10) they're multiplied by 1000 and 10000 respectively to obtain fixed-point integer values. Integer values have the advandage of being testable for exact match (== 0) on all architectures (it's true! Not all architectures can do (reliable) exact matching of floatingpoint values) */ typedef struct fontmap { char *texname; int enc; /* Index in encoding array */ int extention; /* Fixed point, *1000 */ int slant; /* Fixed point, *10000, some font slantings have 4 significant digits, all after the decimalpoint */ char *filename; /* Name of the t1 font file as given in map/dvi */ int t1libid; /* The t1lib id of this font, or -1 if not set up */ char *pathname; /* Full path of the font, once needed and located */ int tfmidx; /* Index in tfminfo array, or -1 */ } fontmap; PRIVATE fontmap *fontmaps; #define FNTMAPSTART 2048 #define FNTMAPGROW 1024 PRIVATE int maxmap=FNTMAPSTART-1; PRIVATE int maplidx=-1; /* widthinfo[n]: TFM widht info, demand loaded as the fonts are used. idx texname widths [0] = cmr10 ... [1] = ptmr8r ... [2] = pcrr8rn ... [3] = putro8r ... The widthinfo is loaded from the font tfm file since the type1 width information isn't precise enough to avoid accumulating rounding errors that make things visibly unaligned. This is esp. noticeable in tables; the vline column separators become unaligned. For other than "design" sizes the widths are scaled up or down. */ typedef struct tfminfos { char *texname; long designsize; long widths[256]; } tfminfos; PRIVATE tfminfos *tfminfo; #define TEXWSTART 2048 #define TEXWGROW 1024 PRIVATE int maxw=TEXWSTART-1; PRIVATE int wlidx=-1; PRIVATE int size_devisor; /* For file reading */ #define BUFFER_SIZE 512 /* This is the conversion factor from TeXs pt to TeXs bp (big point). Maximum machine precision is needed to keep it accurate. */ PRIVATE double bp_fac=72.0/72.27; /* Try to convert from PS charspace units to DVI units with minimal loss of significant digits */ #define t1_dvi_conv(x) ((((int) (x)) << 16)/1000) /* Convert from DVI units to TeX pt */ #define dvi_pt_conv(x) (((long) (x)) >> 16) /* Experiment with preserving significant digits by using floating point. No win observed. */ #define dvi_pt_fconv(x) ((x) / 65536.0) /* Convert from TFM units to DVI units */ #define tfm_dvi_conv(x) (((int) (x)) >> 1) /* ********************** FONT AND ENCODING LOADING ******************** */ PRIVATE char **load_vector P1C(char *,enc) { char *filename; char **vector=NULL; filename=kpse_find_file(enc,kpse_program_text_format,0); if (filename!=NULL) { vector=T1_LoadEncoding(filename); if (vector==NULL) { fprintf(stderr,"%s: Unable to load encoding vector %s from %s\n", enc,filename); perror("xdvi"); exit(1); } fprintf(stderr,"Encoding %s loaded from %s at 0x%lx\n", enc,filename,vector); } else fprintf(stderr,"Unable to load encoding vector %s\n",enc); return vector; } PRIVATE int add_tfm P1C(char *,texname) { /* Load font metrics if not already loaded. Return index into fontmetrics array, or -1 if it failed */ int i; for (i=0;i<=wlidx;i++) if (strcmp(tfminfo[i].texname,texname)==0) return i; if (wlidx==maxw) { maxw += TEXWGROW; tfminfo=realloc(tfminfo,sizeof(*tfminfo)*maxw); if (tfminfo==NULL) { fprintf(stderr,"%s: Error: Out of memory.\n"); exit(1); } } wlidx++; tfminfo[wlidx].texname=texname; if (!tfmload(texname,&tfminfo[wlidx].designsize,tfminfo[wlidx].widths)) { fprintf(stderr,"%s: Could not find/load tfm file for %s. " "%s: Expect ugly output.\n",texname); wlidx--; return -1; } return wlidx; } PRIVATE int add_t1font P2C(char *,fontname, char *,filename) { /* Add t1 font to list, or not if it's already there. Return the t1lib font id. The filename argument is optional, but is assumed to be a full path if it is given */ int id,i,free_it=0; char *path; /* Already set up by that name? */ for (i=0;i<=t1lidx;i++) { if (strcmp(t1fonts[i].shortname,fontname)==0 || strcmp(t1fonts[i].file,fontname)==0) { #if debug fprintf(stderr,"Type1 font %s already loaded from %s\n", fontname, filename); #endif return t1fonts[i].t1id; } } /* Insert and set up new t1 font */ if (t1lidx==maxt1) { /* Make room */ maxt1 += T1GROW; t1fonts=realloc(t1fonts,sizeof(*t1fonts)*maxt1); if (t1fonts==NULL) { fprintf(stderr,"%s: Error: Out of memory\n"); exit(1); } fprintf(stderr,"Enlarged t1 table from %d to %d entries\n", t1lidx, maxt1); } t1lidx++; if (filename == NULL) { /* We don't know the full path name yet, find it */ fprintf(stderr,"Looking for type1: %s\n",fontname); path = kpse_find_file(fontname,kpse_type1_format,0); if (path == NULL) return -1; /* xdvi will use substitution font */ free_it=1; } else { path=filename; } t1fonts[t1lidx].file=strdup(path); t1fonts[t1lidx].t1id=id=T1_AddFont(path); t1fonts[t1lidx].shortname=strdup(fontname); t1fonts[t1lidx].loaded=0; if (free_it) free(path); fprintf(stderr,"%s set-up as t1lib font %d\n", filename, id); #if USE_AFM /* Set the afm filename. Always before loading. If no afm file found t1lib will use fallback code */ path=kpse_find_file(fontname,kpse_afm_format,0); if (path!=NULL) { T1_SetAfmFileName(id,path); free(path); } #endif return id; } PRIVATE int find_texfont P1C(char *,texname) { /* Find fontmap index of texfont */ int i; for (i=0;i '%s'\n",enclidx,enc,file); #endif encodings[enclidx].enc=strdup(enc); encodings[enclidx].file=strdup(file); encodings[enclidx].vector=NULL; /* Demand load later */ if (encodings[enclidx].enc==NULL || encodings[enclidx].file==NULL) { fprintf(stderr,"%s: Ran out memory\n"); exit(0); } return enclidx; } PUBLIC void add_T1_mapentry P4C(char *,name, char *,file, char *,vec, char *,spec) { /* This is called from getpsinfo, once for each fontmap line. We will dutifully enter the information into our fontmap table */ static char delim[]="\t "; char *last, *current; float number; int extend=0; int slant=0; #if 0 fprintf(stderr,"Map entry: %s -> %s(%s) Spec: %s\n",name,file,vec,spec); #endif if (spec!=NULL) { /* Try to analyze the postscript string. We recognize two things: "n ExtendFont" and "m SlantFont". n can be a decimal number in which case it's an extention factor, or a integer, in which case it's a charspace unit? In any case 850 = .85 */ last=strtok(spec,delim); current=strtok(NULL,delim); while (current!=NULL) { if (strcmp(current,"ExtendFont")==0) { sscanf(last,"%f",&number); if (number<10.0) extend = number * 1000.0; else extend = number; #if 0 fprintf(stderr,"EXTEND: %d\n",extend); #endif } else if (strcmp(current,"SlantFont")==0) { sscanf(last,"%f",&number); slant = number * 10000.0; #if 0 fprintf(stderr,"SLANT: %d\n",slant); #endif } last=current; current=strtok(NULL,delim); } } setup_encoded_T1_font(name,file,NULL,new_encoding(NULL,vec),extend,slant); if (fontmaps[maplidx].texname==NULL || fontmaps[maplidx].filename==NULL) { fprintf(stderr, "%s: Error: Dang, can't find any free memory!\n"); exit(1); } } PRIVATE void read_enc_map P1C(char *,file) /* Read encoding map file */ { char *filename; char *enc, *name, *f; char *buffer; FILE *mapfile; int len; int i; static const char delim[]="\t \n\r"; filename=kpse_find_file(file,kpse_program_text_format,1); if (filename==NULL) { fprintf(stderr,"%s: Warning: Unable to find %s\n",file); exit(1); } mapfile = fopen(filename,"r"); if (mapfile==NULL) { fprintf(stderr,"%s: Unable to open %s for reading: ",filename); perror(""); exit(1); } #if debug fprintf(stderr,"Reading encoding map file %s\n",filename); #endif buffer=malloc(BUFFER_SIZE); if (buffer==NULL) { fprintf(stderr,"%s: Out of memory error.\n"); exit(1); } while (fgets(buffer, BUFFER_SIZE, mapfile)!=NULL) { len=strlen(buffer); if (buffer[len-1]!='\n') { fprintf(stderr,"%s: Error: Line longer than %d in %s. %d\n", BUFFER_SIZE,filename,(int)buffer[len]); exit(1); } /* char *enc, *name, *f; */ enc=buffer; while (enc[0]!='\0' && (enc[0]==' ' || enc[0]=='\t')) enc++; /* % in first column is a correct comment */ if (enc[0]=='%' || enc[0]=='\0' || enc[0]=='\n') continue; enc=strtok(enc,delim); name=strtok(NULL,delim); f=strtok(NULL,delim); i=new_encoding(enc,f); fprintf(stderr,"Encoding[%d]: '%s' = '%s' -> '%s'\n", i,enc,name,f); } fclose(mapfile); free(buffer); free(filename); } PRIVATE void read_cfg_file P1C(char *,file) /* Read config file. */ { char *filename; FILE *mapfile; int len; char *keyword; char *f; char *buffer; static const char delim[]="\t \n\r"; if (file==NULL) file="xdvi.cfg"; filename=kpse_find_file(file,kpse_program_text_format,1); if (filename==NULL) { fprintf(stderr,"%s: Warning: unable to find %s\n",file); return; } mapfile = fopen(filename,"r"); if (mapfile==NULL) { fprintf(stderr,"%s: Error: Unable to open %s for reading: ",filename); perror(""); exit(1); } fprintf(stderr,"Reading cfg file %s\n",filename); buffer=malloc(BUFFER_SIZE); if (buffer==NULL) { fprintf(stderr,"%s: Out of memory error.\n"); exit(1); } while (fgets(buffer, BUFFER_SIZE, mapfile)!=NULL) { len=strlen(buffer); if (buffer[len-1]!='\n') { fprintf(stderr, "%s: Error: Line longer than %d in %s. %d\n", BUFFER_SIZE,filename,(int)buffer[len]); exit(1); } keyword=buffer; /* Skip leading whitespace */ while (keyword[0]!='\0' && (keyword[0]==' ' || keyword[0]=='\t')) keyword++; /* % in first column is a correct comment */ if (keyword[0]=='%' || keyword[0]=='\0' || keyword[0]=='\n') continue; keyword=strtok(keyword,delim); if (strcmp(keyword,"dvipsmap")==0) { f=strtok(NULL,delim); #if debug fprintf(stderr,"DVIPSMAP: '%s'\n",f); #endif if (!getpsinfo(f)) { fprintf(stderr,"Could not load dvips map %s\n",f); exit(1); } } else if (strcmp(keyword,"encmap")==0) { f=strtok(NULL,delim); #if debug fprintf(stderr,"Encoding map: '%s'\n",f); #endif read_enc_map(f); } else { fprintf(stderr,"%s: Error: Unknown keyword: '%s' in %s\n", keyword,filename); exit(1); } } fclose(mapfile); free(buffer); free(filename); return; } /* **************************** GLYPH DRAWING *************************** */ /* Set character# ch */ #ifdef TEXXET PUBLIC void set_t1_char P2C(wide_ubyte, cmd, wide_ubyte, ch) #else PUBLIC long set_t1_char P1C(wide_ubyte, ch) #endif { GC gc; int xpos = PXL_H - currwin.base_x ; /* + 1 here, seems t1lib and xdvi rounds the baseline differently */ int ypos = PXL_V - currwin.base_y + 1; int t1libid; /* Side by side comparison of cmr10 and ecrm1000 suggests that t1lib renders the fonts a touch too large, and a factor of 0.96 was arrived at as a reasonable correction for this. Comparing the test file in gv at large sizes indicates that the t1 cmr10 font is a hair taller than ecrm1000 also as seen by gv. But, the size difference in xdvi was bigger. Another related problem is that there are some gaps in math modes tall braces '{', (see for example the amstex users guide). When the factor is applied these gaps are more pronounced and there are more of them, compared to when the factor is not applied. The gaps does not show up in the fullsize window, and when the 0.96 factor is not applied it only seems to show up in the main window when the shrink factor is even. Also, the size difference is in no way obvious unless you're looking for it. All in all the factor has been droped pending further experience with t1 fonts in xdvi. */ float size= dvi_pt_conv(currinf.fontp->scale*(pixels_per_inch/size_devisor))/72.27; int id=currinf.fontp->t1id; int dvi_h_sav; long gw ; /* size=size*0.96; */ if (fontmaps[id].t1libid==-1) load_font_now(id); t1libid=fontmaps[id].t1libid; #if 0 fprintf(stderr,"Setting '%c' of %d, at %ld(%.2fpt), shrinkage is %d\n", ch, t1libid, currinf.fontp->scale, dvi_pt_fconv(currinf.fontp->scale),shrink_factor); #endif if (fontmaps[id].tfmidx==-1) /* Fallback when tfm data is missing. Not precise enough for tables with vertical lines. */ gw = t1_dvi_conv(T1_GetCharWidth(t1libid, ch)*size)* pixels_per_inch/72; else /* Use the widht from the tfm file */ gw = tfminfo[fontmaps[id].tfmidx].widths[ch] * currinf.fontp->dimconv; #ifdef HTEX gc = HTeXreflevel > 0? highGC: foreGC; #else gc = foreGC; #endif #ifdef TEXXET dvi_h_sav = DVI_H; if (currinf.dir < 0) DVI_H -= gw; /* FIXME: There is something about scan_frame in set_char, I have no idea what it does, and dvi-draw does not export it either. */ #endif #ifdef GREY if (use_grey && !(shrink_factor==1)) { T1_AASetCharX(currwin.win, gc, T1_OPAQUE, xpos, ypos, t1libid, ch, size/(double) shrink_factor, NULL); } else #endif { T1_SetCharX(currwin.win, gc, T1_OPAQUE, xpos, ypos, t1libid, ch, size/(double) shrink_factor, NULL); } #ifndef TEXXET return gw; #else # ifdef Omega if ((cmd == PUT1) || (cmd == PUT2)) # else if (cmd == PUT1) # endif DVI_H = dvi_h_sav; else if (currinf.dir > 0) DVI_H += gw; #endif } PUBLIC void read_T1_char P2C(struct font *,fontp, ubyte, ch) { /* Should never be called */ fprintf(stderr,"BUG: asked to load %c\n",ch); } PUBLIC void init_t1 P1C(void,) { /* Initialize t1lib for drawing marks on screen */ if ((T1_InitLib(LOGFILE| IGNORE_CONFIGFILE| IGNORE_FONTDATABASE| T1_NO_AFM)==NULL)) { fprintf(stderr, "%s: Error: Initialization of t1lib failed\n"); exit(1); } T1_SetLogLevel(T1LOG_DEBUG); T1_SetDeviceResolutions((float)pixels_per_inch,(float)pixels_per_inch); /* Thanks to my wife for figuring this out. My mind was putty after struggeling with too many kinds of units and factors for too long: */ size_devisor=pixels_per_inch/75; T1_SetX11Params(DISP, our_visual, our_depth, our_colormap); /* T1_AA_LOW seems better than T1_AA_HIGH */ T1_AASetLevel(T1_AA_HIGH); /* T1_AASetLevel(T1_AA_LOW);*/ T1_AASetBitsPerPixel(our_depth); encodings=malloc(sizeof(*encodings)*ENCSTART); fontmaps=malloc(sizeof(*fontmaps)*FNTMAPSTART); t1fonts=malloc(sizeof(*t1fonts)*T1START); tfminfo=malloc(sizeof(*tfminfo)*TEXWSTART); if (encodings==NULL || fontmaps==NULL || t1fonts==NULL) { fprintf(stderr,"%s: Error: No memory for datastructures.\n"); exit(1); } /* Malloc mem before reading config files! */ read_cfg_file(NULL); } #endif /* t1 */