-/*
-=item i_init_fonts()
-
-Initialize font rendering libraries if they are avaliable.
-
-=cut
-*/
-
-undef_int
-i_init_fonts(int t1log) {
- mm_log((1,"Initializing fonts\n"));
-
-#ifdef HAVE_LIBT1
- i_init_t1(t1log);
-#endif
-
-#ifdef HAVE_LIBTT
- i_init_tt();
-#endif
-
-#ifdef HAVE_FT2
- if (!i_ft2_init())
- return 0;
-#endif
-
- return(1); /* FIXME: Always true - check the return values of the init_t1 and init_tt functions */
-}
-
-
-
-
-#ifdef HAVE_LIBT1
-
-static int t1_get_flags(char const *flags);
-static char *t1_from_utf8(char const *in, int len, int *outlen);
-
-static void t1_push_error(void);
-
-static int t1_active_fonts = 0;
-static int t1_initialized = 0;
-
-/*
-=item i_init_t1(t1log)
-
-Initializes the t1lib font rendering engine.
-
-=cut
-*/
-
-undef_int
-i_init_t1(int t1log) {
- int init_flags = IGNORE_CONFIGFILE|IGNORE_FONTDATABASE;
- mm_log((1,"init_t1()\n"));
-
- if (t1_active_fonts) {
- mm_log((1, "Cannot re-initialize T1 - active fonts\n"));
- return 1;
- }
-
- if (t1_initialized) {
- T1_CloseLib();
- }
-
- if (t1log)
- init_flags |= LOGFILE;
- if ((T1_InitLib(init_flags) == NULL)){
- mm_log((1,"Initialization of t1lib failed\n"));
- return(1);
- }
- T1_SetLogLevel(T1LOG_DEBUG);
- i_t1_set_aa(1); /* Default Antialias value */
-
- ++t1_initialized;
-
- return(0);
-}
-
-
-/*
-=item i_close_t1()
-
-Shuts the t1lib font rendering engine down.
-
- This it seems that this function is never used.
-
-=cut
-*/
-
-void
-i_close_t1(void) {
- T1_CloseLib();
- t1_initialized = 0;
-}
-
-
-/*
-=item i_t1_new(pfb, afm)
-
-Loads the fonts with the given filenames, returns its font id
-
- pfb - path to pfb file for font
- afm - path to afm file for font
-
-=cut
-*/
-
-int
-i_t1_new(char *pfb,char *afm) {
- int font_id;
-
- mm_log((1,"i_t1_new(pfb %s,afm %s)\n",pfb,(afm?afm:"NULL")));
- font_id = T1_AddFont(pfb);
- if (font_id<0) {
- mm_log((1,"i_t1_new: Failed to load pfb file '%s' - return code %d.\n",pfb,font_id));
- return font_id;
- }
-
- if (afm != NULL) {
- mm_log((1,"i_t1_new: requesting afm file '%s'.\n",afm));
- if (T1_SetAfmFileName(font_id,afm)<0) mm_log((1,"i_t1_new: afm loading of '%s' failed.\n",afm));
- }
-
- ++t1_active_fonts;
-
- return font_id;
-}
-
-/*
-=item i_t1_destroy(font_id)
-
-Frees resources for a t1 font with given font id.
-
- font_id - number of the font to free
-
-=cut
-*/
-
-int
-i_t1_destroy(int font_id) {
- mm_log((1,"i_t1_destroy(font_id %d)\n",font_id));
-
- --t1_active_fonts;
-
- return T1_DeleteFont(font_id);
-}
-
-
-/*
-=item i_t1_set_aa(st)
-
-Sets the antialiasing level of the t1 library.
-
- st - 0 = NONE, 1 = LOW, 2 = HIGH.
-
-=cut
-*/
-
-void
-i_t1_set_aa(int st) {
- int i;
- unsigned long cst[17];
- switch(st) {
- case 0:
- T1_AASetBitsPerPixel( 8 );
- T1_AASetLevel( T1_AA_NONE );
- T1_AANSetGrayValues( 0, 255 );
- mm_log((1,"setting T1 antialias to none\n"));
- break;
- case 1:
- T1_AASetBitsPerPixel( 8 );
- T1_AASetLevel( T1_AA_LOW );
- T1_AASetGrayValues( 0,65,127,191,255 );
- mm_log((1,"setting T1 antialias to low\n"));
- break;
- case 2:
- T1_AASetBitsPerPixel(8);
- T1_AASetLevel(T1_AA_HIGH);
- for(i=0;i<17;i++) cst[i]=(i*255)/16;
- T1_AAHSetGrayValues( cst );
- mm_log((1,"setting T1 antialias to high\n"));
- }
-}
-
-
-/*
-=item i_t1_cp(im, xb, yb, channel, fontnum, points, str, len, align)
-
-Interface to text rendering into a single channel in an image
-
- im pointer to image structure
- xb x coordinate of start of string
- yb y coordinate of start of string ( see align )
- channel - destination channel
- fontnum - t1 library font id
- points - number of points in fontheight
- str - string to render
- len - string length
- align - (0 - top of font glyph | 1 - baseline )
-
-=cut
-*/
-
-undef_int
-i_t1_cp(i_img *im,int xb,int yb,int channel,int fontnum,float points,char* str,int len,int align, int utf8, char const *flags) {
- GLYPH *glyph;
- int xsize,ysize,x,y;
- i_color val;
- int mod_flags = t1_get_flags(flags);
-
- unsigned int ch_mask_store;
-
- if (im == NULL) { mm_log((1,"i_t1_cp: Null image in input\n")); return(0); }
-
- if (utf8) {
- int worklen;
- char *work = t1_from_utf8(str, len, &worklen);
- glyph=T1_AASetString( fontnum, work, worklen, 0, mod_flags, points, NULL);
- myfree(work);
- }
- else {
- glyph=T1_AASetString( fontnum, str, len, 0, mod_flags, points, NULL);
- }
- if (glyph == NULL)
- return 0;
-
- mm_log((1,"metrics: ascent: %d descent: %d\n",glyph->metrics.ascent,glyph->metrics.descent));
- mm_log((1," leftSideBearing: %d rightSideBearing: %d\n",glyph->metrics.leftSideBearing,glyph->metrics.rightSideBearing));
- mm_log((1," advanceX: %d advanceY: %d\n",glyph->metrics.advanceX,glyph->metrics.advanceY));
- mm_log((1,"bpp: %d\n",glyph->bpp));
-
- xsize=glyph->metrics.rightSideBearing-glyph->metrics.leftSideBearing;
- ysize=glyph->metrics.ascent-glyph->metrics.descent;
-
- mm_log((1,"width: %d height: %d\n",xsize,ysize));
-
- ch_mask_store=im->ch_mask;
- im->ch_mask=1<<channel;
-
- if (align==1) { xb+=glyph->metrics.leftSideBearing; yb-=glyph->metrics.ascent; }
-
- for(y=0;y<ysize;y++) for(x=0;x<xsize;x++) {
- val.channel[channel]=glyph->bits[y*xsize+x];
- i_ppix(im,x+xb,y+yb,&val);
- }
-
- im->ch_mask=ch_mask_store;
- return 1;
-}
-
-static void
-t1_fix_bbox(BBox *bbox, const char *str, int len, int advance,
- int space_position) {
- /* never called with len == 0 */
- if (str[0] == space_position && bbox->llx > 0)
- bbox->llx = 0;
- if (str[len-1] == space_position && bbox->urx < advance)
- bbox->urx = advance;
- if (bbox->lly > bbox->ury)
- bbox->lly = bbox->ury = 0;
-}
-
-/*
-=item i_t1_bbox(handle, fontnum, points, str, len, cords)
-
-function to get a strings bounding box given the font id and sizes
-
- handle - pointer to font handle
- fontnum - t1 library font id
- points - number of points in fontheight
- str - string to measure
- len - string length
- cords - the bounding box (modified in place)
-
-=cut
-*/
-
-int
-i_t1_bbox(int fontnum,float points,const char *str,int len,int cords[6], int utf8,char const *flags) {
- BBox bbox;
- BBox gbbox;
- int mod_flags = t1_get_flags(flags);
- int advance;
- int space_position = T1_GetEncodingIndex(fontnum, "space");
-
- mm_log((1,"i_t1_bbox(fontnum %d,points %.2f,str '%.*s', len %d)\n",fontnum,points,len,str,len));
- T1_LoadFont(fontnum); /* FIXME: Here a return code is ignored - haw haw haw */
-
- if (len == 0) {
- /* len == 0 has special meaning to T1lib, but it means there's
- nothing to draw, so return that */
- bbox.llx = bbox.lly = bbox.urx = bbox.ury = 0;
- advance = 0;
- }
- else {
- advance = T1_GetStringWidth(fontnum, (char *)str, len, 0, mod_flags);
- if (utf8) {
- int worklen;
- char *work = t1_from_utf8(str, len, &worklen);
- bbox = T1_GetStringBBox(fontnum,work,worklen,0,mod_flags);
- t1_fix_bbox(&bbox, work, worklen, advance, space_position);
- myfree(work);
- }
- else {
- bbox = T1_GetStringBBox(fontnum,(char *)str,len,0,mod_flags);
- t1_fix_bbox(&bbox, str, len, advance, space_position);
- }
- }
- gbbox = T1_GetFontBBox(fontnum);
-
- mm_log((1,"bbox: (%d,%d,%d,%d)\n",
- (int)(bbox.llx*points/1000),
- (int)(gbbox.lly*points/1000),
- (int)(bbox.urx*points/1000),
- (int)(gbbox.ury*points/1000),
- (int)(bbox.lly*points/1000),
- (int)(bbox.ury*points/1000) ));
-
-
- cords[BBOX_NEG_WIDTH]=((float)bbox.llx*points)/1000;
- cords[BBOX_POS_WIDTH]=((float)bbox.urx*points)/1000;
-
- cords[BBOX_GLOBAL_DESCENT]=((float)gbbox.lly*points)/1000;
- cords[BBOX_GLOBAL_ASCENT]=((float)gbbox.ury*points)/1000;
-
- cords[BBOX_DESCENT]=((float)bbox.lly*points)/1000;
- cords[BBOX_ASCENT]=((float)bbox.ury*points)/1000;
-
- cords[BBOX_ADVANCE_WIDTH] = ((float)advance * points)/1000;
- cords[BBOX_RIGHT_BEARING] =
- cords[BBOX_ADVANCE_WIDTH] - cords[BBOX_POS_WIDTH];
-
- return BBOX_RIGHT_BEARING+1;
-}
-
-
-/*
-=item i_t1_text(im, xb, yb, cl, fontnum, points, str, len, align)
-
-Interface to text rendering in a single color onto an image
-
- im - pointer to image structure
- xb - x coordinate of start of string
- yb - y coordinate of start of string ( see align )
- cl - color to draw the text in
- fontnum - t1 library font id
- points - number of points in fontheight
- str - char pointer to string to render
- len - string length
- align - (0 - top of font glyph | 1 - baseline )
-
-=cut
-*/
-
-undef_int
-i_t1_text(i_img *im,int xb,int yb,const i_color *cl,int fontnum,float points,const char* str,int len,int align, int utf8, char const *flags) {
- GLYPH *glyph;
- int xsize,ysize,x,y,ch;
- i_color val;
- unsigned char c,i;
- int mod_flags = t1_get_flags(flags);
-
- if (im == NULL) { mm_log((1,"i_t1_cp: Null image in input\n")); return(0); }
-
- if (utf8) {
- int worklen;
- char *work = t1_from_utf8(str, len, &worklen);
- glyph=T1_AASetString( fontnum, work, worklen, 0, mod_flags, points, NULL);
- myfree(work);
- }
- else {
- /* T1_AASetString() accepts a char * not a const char */
- glyph=T1_AASetString( fontnum, (char *)str, len, 0, mod_flags, points, NULL);
- }
- if (glyph == NULL)
- return 0;
-
- mm_log((1,"metrics: ascent: %d descent: %d\n",glyph->metrics.ascent,glyph->metrics.descent));
- mm_log((1," leftSideBearing: %d rightSideBearing: %d\n",glyph->metrics.leftSideBearing,glyph->metrics.rightSideBearing));
- mm_log((1," advanceX: %d advanceY: %d\n",glyph->metrics.advanceX,glyph->metrics.advanceY));
- mm_log((1,"bpp: %d\n",glyph->bpp));
-
- xsize=glyph->metrics.rightSideBearing-glyph->metrics.leftSideBearing;
- ysize=glyph->metrics.ascent-glyph->metrics.descent;
-
- mm_log((1,"width: %d height: %d\n",xsize,ysize));
-
- if (align==1) { xb+=glyph->metrics.leftSideBearing; yb-=glyph->metrics.ascent; }
-
- for(y=0;y<ysize;y++) for(x=0;x<xsize;x++) {
- c=glyph->bits[y*xsize+x];
- i=255-c;
- i_gpix(im,x+xb,y+yb,&val);
- for(ch=0;ch<im->channels;ch++) val.channel[ch]=(c*cl->channel[ch]+i*val.channel[ch])/255;
- i_ppix(im,x+xb,y+yb,&val);
- }
- return 1;
-}
-
-/*
-=item t1_get_flags(flags)
-
-Processes the characters in I<flags> to create a mod_flags value used
-by some T1Lib functions.
-
-=cut
- */
-static int
-t1_get_flags(char const *flags) {
- int mod_flags = T1_KERNING;
-
- while (*flags) {
- switch (*flags++) {
- case 'u': case 'U': mod_flags |= T1_UNDERLINE; break;
- case 'o': case 'O': mod_flags |= T1_OVERLINE; break;
- case 's': case 'S': mod_flags |= T1_OVERSTRIKE; break;
- /* ignore anything we don't recognize */
- }
- }
-
- return mod_flags;
-}
-
-/*
-=item t1_from_utf8(char const *in, int len, int *outlen)
-
-Produces an unencoded version of I<in> by dropping any Unicode
-character over 255.
-
-Returns a newly allocated buffer which should be freed with myfree().
-Sets *outlen to the number of bytes used in the output string.
-
-=cut
-*/
-
-static char *
-t1_from_utf8(char const *in, int len, int *outlen) {
- /* at this point len is from a perl SV, so can't approach MAXINT */
- char *out = mymalloc(len+1); /* checked 5Nov05 tonyc */
- char *p = out;
- unsigned long c;
-
- while (len) {
- c = i_utf8_advance(&in, &len);
- if (c == ~0UL) {
- myfree(out);
- i_push_error(0, "invalid UTF8 character");
- return 0;
- }
- /* yeah, just drop them */
- if (c < 0x100) {
- *p++ = (char)c;
- }
- }
- *p = '\0';
- *outlen = p - out;
-
- return out;
-}
-
-/*
-=item i_t1_has_chars(font_num, text, len, utf8, out)
-
-Check if the given characters are defined by the font. Note that len
-is the number of bytes, not the number of characters (when utf8 is
-non-zero).
-
-out[char index] will be true if the character exists.
-
-Accepts UTF-8, but since T1 can only have 256 characters, any chars
-with values over 255 will simply be returned as false.
-
-Returns the number of characters that were checked.
-
-=cut
-*/
-
-int
-i_t1_has_chars(int font_num, const char *text, int len, int utf8,
- char *out) {
- int count = 0;
-
- mm_log((1, "i_t1_has_chars(font_num %d, text %p, len %d, utf8 %d)\n",
- font_num, text, len, utf8));
-
- i_clear_error();
- if (T1_LoadFont(font_num)) {
- t1_push_error();
- return 0;
- }
-
- while (len) {
- unsigned long c;
- if (utf8) {
- c = i_utf8_advance(&text, &len);
- if (c == ~0UL) {
- i_push_error(0, "invalid UTF8 character");
- return 0;
- }
- }
- else {
- c = (unsigned char)*text++;
- --len;
- }
-
- if (c >= 0x100) {
- /* limit of 256 characters for T1 */
- *out++ = 0;
- }
- else {
- char const * name = T1_GetCharName(font_num, (unsigned char)c);
-
- if (name) {
- *out++ = strcmp(name, ".notdef") != 0;
- }
- else {
- mm_log((2, " No name found for character %lx\n", c));
- *out++ = 0;
- }
- }
- ++count;
- }
-
- return count;
-}
-
-/*
-=item i_t1_face_name(font_num, name_buf, name_buf_size)
-
-Copies the face name of the given C<font_num> to C<name_buf>. Returns
-the number of characters required to store the name (which can be
-larger than C<name_buf_size>, including the space required to store
-the terminating NUL).
-
-If name_buf is too small (as specified by name_buf_size) then the name
-will be truncated. name_buf will always be NUL termintaed.
-
-=cut
-*/
-
-int
-i_t1_face_name(int font_num, char *name_buf, size_t name_buf_size) {
- char *name;
-
- T1_errno = 0;
- if (T1_LoadFont(font_num)) {
- t1_push_error();
- return 0;
- }
- name = T1_GetFontName(font_num);
-
- if (name) {
- strncpy(name_buf, name, name_buf_size);
- name_buf[name_buf_size-1] = '\0';
- return strlen(name) + 1;
- }
- else {
- t1_push_error();
- return 0;
- }
-}
-
-int
-i_t1_glyph_name(int font_num, unsigned long ch, char *name_buf,
- size_t name_buf_size) {
- char *name;
-
- i_clear_error();
- if (ch > 0xFF) {
- return 0;
- }
- if (T1_LoadFont(font_num)) {
- t1_push_error();
- return 0;
- }
- name = T1_GetCharName(font_num, (unsigned char)ch);
- if (name) {
- if (strcmp(name, ".notdef")) {
- strncpy(name_buf, name, name_buf_size);
- name_buf[name_buf_size-1] = '\0';
- return strlen(name) + 1;
- }
- else {
- return 0;
- }
- }
- else {
- t1_push_error();
- return 0;
- }
-}
-
-static void
-t1_push_error(void) {
- switch (T1_errno) {
- case 0:
- i_push_error(0, "No error");
- break;
-
-#ifdef T1ERR_SCAN_FONT_FORMAT
- case T1ERR_SCAN_FONT_FORMAT:
- i_push_error(T1ERR_SCAN_FONT_FORMAT, "SCAN_FONT_FORMAT");
- break;
-#endif
-
-#ifdef T1ERR_SCAN_FILE_OPEN_ERR
- case T1ERR_SCAN_FILE_OPEN_ERR:
- i_push_error(T1ERR_SCAN_FILE_OPEN_ERR, "SCAN_FILE_OPEN_ERR");
- break;
-#endif
-
-#ifdef T1ERR_SCAN_OUT_OF_MEMORY
- case T1ERR_SCAN_OUT_OF_MEMORY:
- i_push_error(T1ERR_SCAN_OUT_OF_MEMORY, "SCAN_OUT_OF_MEMORY");
- break;
-#endif
-
-#ifdef T1ERR_SCAN_ERROR
- case T1ERR_SCAN_ERROR:
- i_push_error(T1ERR_SCAN_ERROR, "SCAN_ERROR");
- break;
-#endif
-
-#ifdef T1ERR_SCAN_FILE_EOF
- case T1ERR_SCAN_FILE_EOF:
- i_push_error(T1ERR_SCAN_FILE_EOF, "SCAN_FILE_EOF");
- break;
-#endif
-
-#ifdef T1ERR_PATH_ERROR
- case T1ERR_PATH_ERROR:
- i_push_error(T1ERR_PATH_ERROR, "PATH_ERROR");
- break;
-#endif
-
-#ifdef T1ERR_PARSE_ERROR
- case T1ERR_PARSE_ERROR:
- i_push_error(T1ERR_PARSE_ERROR, "PARSE_ERROR");
- break;
-#endif
-
-#ifdef T1ERR_TYPE1_ABORT
- case T1ERR_TYPE1_ABORT:
- i_push_error(T1ERR_TYPE1_ABORT, "TYPE1_ABORT");
- break;
-#endif
-
-#ifdef T1ERR_INVALID_FONTID
- case T1ERR_INVALID_FONTID:
- i_push_error(T1ERR_INVALID_FONTID, "INVALID_FONTID");
- break;
-#endif
-
-#ifdef T1ERR_INVALID_PARAMETER
- case T1ERR_INVALID_PARAMETER:
- i_push_error(T1ERR_INVALID_PARAMETER, "INVALID_PARAMETER");
- break;
-#endif
-
-#ifdef T1ERR_OP_NOT_PERMITTED
- case T1ERR_OP_NOT_PERMITTED:
- i_push_error(T1ERR_OP_NOT_PERMITTED, "OP_NOT_PERMITTED");
- break;
-#endif
-
-#ifdef T1ERR_ALLOC_MEM
- case T1ERR_ALLOC_MEM:
- i_push_error(T1ERR_ALLOC_MEM, "ALLOC_MEM");
- break;
-#endif
-
-#ifdef T1ERR_FILE_OPEN_ERR
- case T1ERR_FILE_OPEN_ERR:
- i_push_error(T1ERR_FILE_OPEN_ERR, "FILE_OPEN_ERR");
- break;
-#endif
-
-#ifdef T1ERR_UNSPECIFIED
- case T1ERR_UNSPECIFIED:
- i_push_error(T1ERR_UNSPECIFIED, "UNSPECIFIED");
- break;
-#endif
-
-#ifdef T1ERR_NO_AFM_DATA
- case T1ERR_NO_AFM_DATA:
- i_push_error(T1ERR_NO_AFM_DATA, "NO_AFM_DATA");
- break;
-#endif
-
-#ifdef T1ERR_X11
- case T1ERR_X11:
- i_push_error(T1ERR_X11, "X11");
- break;
-#endif
-
-#ifdef T1ERR_COMPOSITE_CHAR
- case T1ERR_COMPOSITE_CHAR:
- i_push_error(T1ERR_COMPOSITE_CHAR, "COMPOSITE_CHAR");
- break;
-#endif
-
- default:
- i_push_errorf(T1_errno, "unknown error %d", (int)T1_errno);
- }
-}
-
-#endif /* HAVE_LIBT1 */
-
projects / imager.git / blobdiff