/* * Loadable FNT font engine for Microwindows * Copyright (c) 2003 Greg Haerr * * Load a .fnt (Microwindows native) binary font, store in incore format. */ #include #include #include "swap.h" #include "device.h" #include "devfont.h" #include "../drivers/genfont.h" /* * .fnt loadable font file format definition * * format len description * ------------------------- ---- ------------------------------ * UCHAR version[4] 4 magic number and version bytes * UCHAR name[64] 64 font name, space padded * UCHAR copyright[256] 256 copyright info, space padded * USHORT maxwidth 2 font max width in pixels * USHORT height 2 font height in pixels * USHORT ascent 2 font ascent (baseline) in pixels * USHORT pad 2 unused, pad to 32-bit boundary * ULONG firstchar 4 first character code in font * ULONG defaultchar 4 default character code in font * ULONG size 4 # characters in font * ULONG nbits 4 # words imagebits data in file * ULONG noffset 4 # longs offset data in file * ULONG nwidth 4 # bytes width data in file * MWIMAGEBITS bits nbits*2 image bits variable data * [MWIMAGEBITS padded to 32-bit boundary] * ULONG offset noffset*4 offset variable data * UCHAR width nwidth*1 width variable data */ /* loadable font magic and version #*/ #define VERSION "RB11" /* The user hase the option including ZLIB and being able to */ /* directly read compressed .fnt files, or to omit it and save */ /* space. The following defines make life much easier */ #ifdef HAVE_FNTGZ_SUPPORT #include #define FILEP gzFile #define FOPEN(path, mode) gzopen(path, mode) #define FREAD(file, buffer, size) gzread(file, buffer, size) #define FSEEK(file, offset, whence) gzseek(file, offset, whence) #define FCLOSE(file) gzclose(file) #else #define FILEP FILE * #define FOPEN(path, mode) fopen(path, mode) #define FREAD(file, buffer, size) fread(buffer, 1, size, file) #define FSEEK(file, offset, whence) fseek(file, offset, whence) #define FCLOSE(file) fclose(file) #endif /* Handling routines for FNT fonts, use MWCOREFONT structure */ static void fnt_unloadfont(PMWFONT font); static PMWCFONT fnt_load_font(const char *path); /* these procs used when font ASCII indexed*/ static MWFONTPROCS fnt_fontprocs = { MWTF_ASCII, /* routines expect ascii */ gen_getfontinfo, gen_gettextsize, gen_gettextbits, fnt_unloadfont, corefont_drawtext, NULL, /* setfontsize */ NULL, /* setfontrotation */ NULL, /* setfontattr */ NULL, /* duplicate not supported */ }; /* these procs used when font requires UC16 index*/ static MWFONTPROCS fnt_fontprocs16 = { MWTF_UC16, /* large font, expect UC16*/ gen_getfontinfo, gen16_gettextsize, gen_gettextbits, fnt_unloadfont, gen16_drawtext, NULL, /* setfontsize */ NULL, /* setfontrotation */ NULL, /* setfontattr */ NULL, /* duplicate not supported */ }; PMWCOREFONT fnt_createfont(const char *name, MWCOORD height, int attr) { PMWCOREFONT pf; PMWCFONT cfont; int uc16; /* try to open file and read in font data*/ cfont = fnt_load_font(name); if (!cfont) return NULL; if (!(pf = (MWCOREFONT *) malloc(sizeof(MWCOREFONT)))) { free(cfont); return NULL; } /* determine if unicode-16 indexing required*/ uc16 = cfont->firstchar > 255 || (cfont->firstchar + cfont->size) > 255; pf->fontprocs = uc16? &fnt_fontprocs16: &fnt_fontprocs; pf->fontsize = pf->fontrotation = pf->fontattr = 0; pf->name = "FNT"; pf->cfont = cfont; return pf; } void fnt_unloadfont(PMWFONT font) { PMWCOREFONT pf = (PMWCOREFONT)font; PMWCFONT pfc = pf->cfont; if (pfc) { if (pfc->width) free(pf->cfont->width); if (pfc->offset) free(pf->cfont->offset); if (pfc->bits) free(pf->cfont->bits); if (pfc->name) free(pf->cfont->name); free(pfc); } free(font); } static int READBYTE(FILEP fp, unsigned char *cp) { #ifdef HAVE_FNTGZ_SUPPORT unsigned char buf[1]; if (FREAD(fp, buf, 1) != 1) return 0; *cp = buf[0]; #else int c; if ((c = getc(fp)) == EOF) return 0; *cp = (unsigned char)c; #endif return 1; } static int READSHORT(FILEP fp, unsigned short *sp) { #ifdef HAVE_FNTGZ_SUPPORT unsigned char buf[2]; if (FREAD(fp, buf, 2) != 2) return 0; *sp = buf[0] | (buf[1] #else int c; unsigned short s; if ((c = getc(fp)) == EOF) return 0; s = c & 0xff; if ((c = getc(fp)) == EOF) return 0; *sp = (c #endif return 1; } static int READLONG(FILEP fp, unsigned long *lp) { #ifdef HAVE_FNTGZ_SUPPORT unsigned char buf[4]; if (FREAD(fp, buf, 4) != 4) return 0; *lp = buf[0] | (buf[1] #else int c; unsigned long l; if ((c = getc(fp)) == EOF) return 0; l = c & 0xff; if ((c = getc(fp)) == EOF) return 0; l |= (c if ((c = getc(fp)) == EOF) return 0; l |= (c if ((c = getc(fp)) == EOF) return 0; *lp = (c #endif return 1; } /* read count bytes*/ static int READSTR(FILEP fp, char *buf, int count) { return FREAD(fp, buf, count); } /* read totlen bytes, return NUL terminated string*/ /* may write 1 past buf[totlen]; removes blank pad*/ static int READSTRPAD(FILEP fp, char *buf, int totlen) { char *p; if (FREAD(fp, buf, totlen) != totlen) return 0; p = &buf[totlen]; *p-- = 0; while (*p == ' ' && p >= buf) *p-- = '\0'; return totlen; } /* read and load font, return incore font structure*/ static PMWCFONT fnt_load_font(const char *path) { FILEP ifp; PMWCFONT pf = NULL; int i; unsigned short maxwidth, height, ascent, pad; unsigned long firstchar, defaultchar, size; unsigned long nbits, noffset, nwidth; char version[4+1]; char name[64+1]; char copyright[256+1]; char fname[256]; ifp = FOPEN(path, "rb"); if (!ifp) { strcpy(fname, FNT_FONT_DIR "/"); strcpy(fname + sizeof(FNT_FONT_DIR), path); ifp = FOPEN(fname, "rb"); /* Try to grab it from the MWFONTDIR directory */ if (!ifp) { char *env = getenv("MWFONTDIR"); if (env) { sprintf(fname, "%s/%s", env, path); printf("Trying to get font from %s\n", fname); ifp = FOPEN(fname, "rb"); } } } if (!ifp) return NULL; /* read magic and version #*/ memset(version, 0, sizeof(version)); if (READSTR(ifp, version, 4) != 4) goto errout; if (strcmp(version, VERSION) != 0) goto errout; pf = (PMWCFONT)calloc(1, sizeof(MWCFONT)); if (!pf) goto errout; /* internal font name*/ if (READSTRPAD(ifp, name, 64) != 64) goto errout; pf->name = (char *)malloc(strlen(name)+1); if (!pf->name) goto errout; strcpy(pf->name, name); /* copyright, not currently stored*/ if (READSTRPAD(ifp, copyright, 256) != 256) goto errout; /* font info*/ if (!READSHORT(ifp, &maxwidth)) goto errout; pf->maxwidth = maxwidth; if (!READSHORT(ifp, &height)) goto errout; pf->height = height; if (!READSHORT(ifp, &ascent)) goto errout; pf->ascent = ascent; if (!READSHORT(ifp, &pad)) goto errout; if (!READLONG(ifp, &firstchar)) goto errout; pf->firstchar = firstchar; if (!READLONG(ifp, &defaultchar)) goto errout; pf->defaultchar = defaultchar; if (!READLONG(ifp, &size)) goto errout; pf->size = size; /* variable font data sizes*/ /* # words of MWIMAGEBITS*/ if (!READLONG(ifp, &nbits)) goto errout; pf->bits = (MWIMAGEBITS *)malloc(nbits * sizeof(MWIMAGEBITS)); if (!pf->bits) goto errout; pf->bits_size = nbits; /* # longs of offset*/ if (!READLONG(ifp, &noffset)) goto errout; if (noffset) { pf->offset = (unsigned long *)malloc(noffset * sizeof(unsigned long)); if (!pf->offset) goto errout; } /* # bytes of width*/ if (!READLONG(ifp, &nwidth)) goto errout; if (nwidth) { pf->width = (unsigned char *)malloc(nwidth * sizeof(unsigned char)); if (!pf->width) goto errout; } /* variable font data*/ for (i=0; i if (!READSHORT(ifp, &pf->bits[i])) goto errout; if (noffset) for (i=0; isize; ++i) if (!READLONG(ifp, &pf->offset[i])) goto errout; if (nwidth) for (i=0; isize; ++i) if (!READBYTE(ifp, &pf->width[i])) goto errout; FCLOSE(ifp); return pf; /* success!*/ errout: FCLOSE(ifp); if (!pf) return NULL; if (pf->name) free(pf->name); if (pf->bits) free(pf->bits); if (pf->offset) free(pf->offset); if (pf->width) free(pf->width); free(pf); return NULL; }
