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#include "fitz.h"
#include "mupdf.h"
fz_error
pdf_load_type3_font(pdf_font_desc **fontdescp, pdf_xref *xref, fz_obj *rdb, fz_obj *dict)
{
fz_error error;
char buf[256];
char *estrings[256];
pdf_font_desc *fontdesc;
fz_obj *encoding;
fz_obj *widths;
fz_obj *charprocs;
fz_obj *obj;
int first, last;
int i, k, n;
fz_rect bbox;
fz_matrix matrix;
obj = fz_dict_gets(dict, "Name");
if (fz_is_name(obj))
fz_strlcpy(buf, fz_to_name(obj), sizeof buf);
else
sprintf(buf, "Unnamed-T3");
fontdesc = pdf_new_font_desc();
obj = fz_dict_gets(dict, "FontMatrix");
matrix = pdf_to_matrix(obj);
obj = fz_dict_gets(dict, "FontBBox");
bbox = pdf_to_rect(obj);
fontdesc->font = fz_new_type3_font(buf, matrix);
fz_set_font_bbox(fontdesc->font, bbox.x0, bbox.y0, bbox.x1, bbox.y1);
/* Encoding */
for (i = 0; i < 256; i++)
estrings[i] = NULL;
encoding = fz_dict_gets(dict, "Encoding");
if (!encoding)
{
error = fz_throw("syntaxerror: Type3 font missing Encoding");
goto cleanup;
}
if (fz_is_name(encoding))
pdf_load_encoding(estrings, fz_to_name(encoding));
if (fz_is_dict(encoding))
{
fz_obj *base, *diff, *item;
base = fz_dict_gets(encoding, "BaseEncoding");
if (fz_is_name(base))
pdf_load_encoding(estrings, fz_to_name(base));
diff = fz_dict_gets(encoding, "Differences");
if (fz_is_array(diff))
{
n = fz_array_len(diff);
k = 0;
for (i = 0; i < n; i++)
{
item = fz_array_get(diff, i);
if (fz_is_int(item))
k = fz_to_int(item);
if (fz_is_name(item))
estrings[k++] = fz_to_name(item);
if (k < 0) k = 0;
if (k > 255) k = 255;
}
}
}
fontdesc->encoding = pdf_new_identity_cmap(0, 1);
error = pdf_load_to_unicode(fontdesc, xref, estrings, NULL, fz_dict_gets(dict, "ToUnicode"));
if (error)
goto cleanup;
/* Widths */
pdf_set_default_hmtx(fontdesc, 0);
first = fz_to_int(fz_dict_gets(dict, "FirstChar"));
last = fz_to_int(fz_dict_gets(dict, "LastChar"));
widths = fz_dict_gets(dict, "Widths");
if (!widths)
{
error = fz_throw("syntaxerror: Type3 font missing Widths");
goto cleanup;
}
for (i = first; i <= last; i++)
{
float w = fz_to_real(fz_array_get(widths, i - first));
w = fontdesc->font->t3matrix.a * w * 1000;
fontdesc->font->t3widths[i] = w * 0.001f;
pdf_add_hmtx(fontdesc, i, i, w);
}
pdf_end_hmtx(fontdesc);
/* Resources -- inherit page resources if the font doesn't have its own */
fontdesc->font->t3resources = fz_dict_gets(dict, "Resources");
if (!fontdesc->font->t3resources)
fontdesc->font->t3resources = rdb;
if (fontdesc->font->t3resources)
fz_keep_obj(fontdesc->font->t3resources);
if (!fontdesc->font->t3resources)
fz_warn("no resource dictionary for type 3 font!");
fontdesc->font->t3xref = xref;
fontdesc->font->t3run = pdf_run_glyph;
/* CharProcs */
charprocs = fz_dict_gets(dict, "CharProcs");
if (!charprocs)
{
error = fz_throw("syntaxerror: Type3 font missing CharProcs");
goto cleanup;
}
for (i = 0; i < 256; i++)
{
if (estrings[i])
{
obj = fz_dict_gets(charprocs, estrings[i]);
if (pdf_is_stream(xref, fz_to_num(obj), fz_to_gen(obj)))
{
error = pdf_load_stream(&fontdesc->font->t3procs[i], xref, fz_to_num(obj), fz_to_gen(obj));
if (error)
goto cleanup;
}
}
}
*fontdescp = fontdesc;
return fz_okay;
cleanup:
fz_drop_font(fontdesc->font);
fz_free(fontdesc);
return fz_rethrow(error, "cannot load type3 font (%d %d R)", fz_to_num(dict), fz_to_gen(dict));
}
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