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#include "fitz-internal.h"
#include "mupdf-internal.h"
static void
pdf_run_glyph_func(void *doc, void *rdb, fz_buffer *contents, fz_device *dev, const fz_matrix *ctm, void *gstate, int nested_depth)
{
pdf_run_glyph(doc, (pdf_obj *)rdb, contents, dev, ctm, gstate, nested_depth);
}
static void
pdf_t3_free_resources(void *doc, void *rdb_)
{
pdf_obj *rdb = (pdf_obj *)rdb_;
pdf_drop_obj(rdb);
}
pdf_font_desc *
pdf_load_type3_font(pdf_document *xref, pdf_obj *rdb, pdf_obj *dict)
{
char buf[256];
char *estrings[256];
pdf_font_desc *fontdesc = NULL;
pdf_obj *encoding;
pdf_obj *widths;
pdf_obj *charprocs;
pdf_obj *obj;
int first, last;
int i, k, n;
fz_rect bbox;
fz_matrix matrix;
fz_context *ctx = xref->ctx;
fz_var(fontdesc);
fz_try(ctx)
{
obj = pdf_dict_gets(dict, "Name");
if (pdf_is_name(obj))
fz_strlcpy(buf, pdf_to_name(obj), sizeof buf);
else
sprintf(buf, "Unnamed-T3");
fontdesc = pdf_new_font_desc(ctx);
obj = pdf_dict_gets(dict, "FontMatrix");
pdf_to_matrix(ctx, obj, &matrix);
obj = pdf_dict_gets(dict, "FontBBox");
fz_transform_rect(pdf_to_rect(ctx, obj, &bbox), &matrix);
fontdesc->font = fz_new_type3_font(ctx, buf, &matrix);
fontdesc->size += sizeof(fz_font) + 256 * (sizeof(fz_buffer*) + sizeof(float));
fz_set_font_bbox(ctx, fontdesc->font, bbox.x0, bbox.y0, bbox.x1, bbox.y1);
/* Encoding */
for (i = 0; i < 256; i++)
estrings[i] = NULL;
encoding = pdf_dict_gets(dict, "Encoding");
if (!encoding)
{
fz_throw(ctx, "syntaxerror: Type3 font missing Encoding");
}
if (pdf_is_name(encoding))
pdf_load_encoding(estrings, pdf_to_name(encoding));
if (pdf_is_dict(encoding))
{
pdf_obj *base, *diff, *item;
base = pdf_dict_gets(encoding, "BaseEncoding");
if (pdf_is_name(base))
pdf_load_encoding(estrings, pdf_to_name(base));
diff = pdf_dict_gets(encoding, "Differences");
if (pdf_is_array(diff))
{
n = pdf_array_len(diff);
k = 0;
for (i = 0; i < n; i++)
{
item = pdf_array_get(diff, i);
if (pdf_is_int(item))
k = pdf_to_int(item);
if (pdf_is_name(item) && k >= 0 && k < nelem(estrings))
estrings[k++] = pdf_to_name(item);
}
}
}
fontdesc->encoding = pdf_new_identity_cmap(ctx, 0, 1);
fontdesc->size += pdf_cmap_size(ctx, fontdesc->encoding);
pdf_load_to_unicode(xref, fontdesc, estrings, NULL, pdf_dict_gets(dict, "ToUnicode"));
/* Widths */
pdf_set_default_hmtx(ctx, fontdesc, 0);
first = pdf_to_int(pdf_dict_gets(dict, "FirstChar"));
last = pdf_to_int(pdf_dict_gets(dict, "LastChar"));
if (first < 0 || last > 255 || first > last)
first = last = 0;
widths = pdf_dict_gets(dict, "Widths");
if (!widths)
{
fz_throw(ctx, "syntaxerror: Type3 font missing Widths");
}
for (i = first; i <= last; i++)
{
float w = pdf_to_real(pdf_array_get(widths, i - first));
w = fontdesc->font->t3matrix.a * w * 1000;
fontdesc->font->t3widths[i] = w * 0.001f;
pdf_add_hmtx(ctx, fontdesc, i, i, w);
}
pdf_end_hmtx(ctx, fontdesc);
/* Resources -- inherit page resources if the font doesn't have its own */
fontdesc->font->t3freeres = pdf_t3_free_resources;
fontdesc->font->t3resources = pdf_dict_gets(dict, "Resources");
if (!fontdesc->font->t3resources)
fontdesc->font->t3resources = rdb;
if (fontdesc->font->t3resources)
pdf_keep_obj(fontdesc->font->t3resources);
if (!fontdesc->font->t3resources)
fz_warn(ctx, "no resource dictionary for type 3 font!");
fontdesc->font->t3doc = xref;
fontdesc->font->t3run = pdf_run_glyph_func;
/* CharProcs */
charprocs = pdf_dict_gets(dict, "CharProcs");
if (!charprocs)
{
fz_throw(ctx, "syntaxerror: Type3 font missing CharProcs");
}
for (i = 0; i < 256; i++)
{
if (estrings[i])
{
obj = pdf_dict_gets(charprocs, estrings[i]);
if (pdf_is_stream(xref, pdf_to_num(obj), pdf_to_gen(obj)))
{
fontdesc->font->t3procs[i] = pdf_load_stream(xref, pdf_to_num(obj), pdf_to_gen(obj));
fontdesc->size += fontdesc->font->t3procs[i]->cap;
fontdesc->size += 0; // TODO: display list size calculation
}
}
}
}
fz_catch(ctx)
{
if (fontdesc)
pdf_drop_font(ctx, fontdesc);
fz_throw(ctx, "cannot load type3 font (%d %d R)", pdf_to_num(dict), pdf_to_gen(dict));
}
return fontdesc;
}
void pdf_load_type3_glyphs(pdf_document *xref, pdf_font_desc *fontdesc, int nested_depth)
{
int i;
fz_context *ctx = xref->ctx;
fz_try(ctx)
{
for (i = 0; i < 256; i++)
{
if (fontdesc->font->t3procs[i])
{
fz_prepare_t3_glyph(ctx, fontdesc->font, i, nested_depth);
fontdesc->size += 0; // TODO: display list size calculation
}
}
}
fz_catch(ctx)
{
fz_warn(ctx, "Type3 glyph load failed: %s", fz_caught(ctx));
}
}
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