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#include "mupdf/fitz.h"
#include "mupdf/pdf.h"
#include "../fitz/font-imp.h"
static void
pdf_run_glyph_func(fz_context *ctx, void *doc, void *rdb, fz_buffer *contents, fz_device *dev, fz_matrix ctm, void *gstate, fz_default_colorspaces *default_cs)
{
pdf_run_glyph(ctx, doc, (pdf_obj *)rdb, contents, dev, ctm, gstate, default_cs);
}
static void
pdf_t3_free_resources(fz_context *ctx, void *doc, void *rdb_)
{
pdf_obj *rdb = (pdf_obj *)rdb_;
pdf_drop_obj(ctx, rdb);
}
pdf_font_desc *
pdf_load_type3_font(fz_context *ctx, pdf_document *doc, pdf_obj *rdb, pdf_obj *dict)
{
char buf[256];
const 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_font *font = NULL;
fz_var(fontdesc);
/* Make a new type3 font entry in the document */
if (doc->num_type3_fonts == doc->max_type3_fonts)
{
int new_max = doc->max_type3_fonts * 2;
if (new_max == 0)
new_max = 4;
doc->type3_fonts = fz_resize_array(ctx, doc->type3_fonts, new_max, sizeof(*doc->type3_fonts));
doc->max_type3_fonts = new_max;
}
fz_try(ctx)
{
obj = pdf_dict_get(ctx, dict, PDF_NAME(Name));
if (pdf_is_name(ctx, obj))
fz_strlcpy(buf, pdf_to_name(ctx, obj), sizeof buf);
else
fz_strlcpy(buf, "Unnamed-T3", sizeof buf);
fontdesc = pdf_new_font_desc(ctx);
matrix = pdf_dict_get_matrix(ctx, dict, PDF_NAME(FontMatrix));
bbox = pdf_dict_get_rect(ctx, dict, PDF_NAME(FontBBox));
bbox = fz_transform_rect(bbox, matrix);
font = fz_new_type3_font(ctx, buf, matrix);
fontdesc->font = font;
fontdesc->size += sizeof(fz_font) + 256 * (sizeof(fz_buffer*) + sizeof(float));
fz_set_font_bbox(ctx, font, bbox.x0, bbox.y0, bbox.x1, bbox.y1);
/* Encoding */
for (i = 0; i < 256; i++)
estrings[i] = NULL;
encoding = pdf_dict_get(ctx, dict, PDF_NAME(Encoding));
if (!encoding)
{
fz_throw(ctx, FZ_ERROR_SYNTAX, "Type3 font missing Encoding");
}
if (pdf_is_name(ctx, encoding))
pdf_load_encoding(estrings, pdf_to_name(ctx, encoding));
if (pdf_is_dict(ctx, encoding))
{
pdf_obj *base, *diff, *item;
base = pdf_dict_get(ctx, encoding, PDF_NAME(BaseEncoding));
if (pdf_is_name(ctx, base))
pdf_load_encoding(estrings, pdf_to_name(ctx, base));
diff = pdf_dict_get(ctx, encoding, PDF_NAME(Differences));
if (pdf_is_array(ctx, diff))
{
n = pdf_array_len(ctx, diff);
k = 0;
for (i = 0; i < n; i++)
{
item = pdf_array_get(ctx, diff, i);
if (pdf_is_int(ctx, item))
k = pdf_to_int(ctx, item);
if (pdf_is_name(ctx, item) && k >= 0 && k < nelem(estrings))
estrings[k++] = pdf_to_name(ctx, item);
}
}
}
fontdesc->encoding = pdf_new_identity_cmap(ctx, 0, 1);
fontdesc->size += pdf_cmap_size(ctx, fontdesc->encoding);
pdf_load_to_unicode(ctx, doc, fontdesc, estrings, NULL, pdf_dict_get(ctx, dict, PDF_NAME(ToUnicode)));
/* Use the glyph index as ASCII when we can't figure out a proper encoding */
if (fontdesc->cid_to_ucs_len == 256)
{
for (i = 32; i < 127; ++i)
if (fontdesc->cid_to_ucs[i] == FZ_REPLACEMENT_CHARACTER)
fontdesc->cid_to_ucs[i] = i;
}
/* Widths */
pdf_set_default_hmtx(ctx, fontdesc, 0);
first = pdf_dict_get_int(ctx, dict, PDF_NAME(FirstChar));
last = pdf_dict_get_int(ctx, dict, PDF_NAME(LastChar));
if (first < 0 || last > 255 || first > last)
first = last = 0;
widths = pdf_dict_get(ctx, dict, PDF_NAME(Widths));
if (!widths)
{
fz_throw(ctx, FZ_ERROR_SYNTAX, "Type3 font missing Widths");
}
for (i = first; i <= last; i++)
{
float w = pdf_array_get_real(ctx, widths, i - first);
w = font->t3matrix.a * w * 1000;
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 */
font->t3freeres = pdf_t3_free_resources;
font->t3resources = pdf_dict_get(ctx, dict, PDF_NAME(Resources));
if (!font->t3resources)
font->t3resources = rdb;
if (font->t3resources)
pdf_keep_obj(ctx, font->t3resources);
if (!font->t3resources)
fz_warn(ctx, "no resource dictionary for type 3 font!");
font->t3doc = doc;
font->t3run = pdf_run_glyph_func;
/* CharProcs */
charprocs = pdf_dict_get(ctx, dict, PDF_NAME(CharProcs));
if (!charprocs)
{
fz_throw(ctx, FZ_ERROR_SYNTAX, "Type3 font missing CharProcs");
}
for (i = 0; i < 256; i++)
{
if (estrings[i])
{
obj = pdf_dict_gets(ctx, charprocs, estrings[i]);
if (pdf_is_stream(ctx, obj))
{
font->t3procs[i] = pdf_load_stream(ctx, obj);
fz_trim_buffer(ctx, font->t3procs[i]);
fontdesc->size += fz_buffer_storage(ctx, font->t3procs[i], NULL);
fontdesc->size += 0; // TODO: display list size calculation
}
}
}
}
fz_catch(ctx)
{
pdf_drop_font(ctx, fontdesc);
fz_rethrow(ctx);
}
doc->type3_fonts[doc->num_type3_fonts++] = fz_keep_font(ctx, font);
return fontdesc;
}
void pdf_load_type3_glyphs(fz_context *ctx, pdf_document *doc, pdf_font_desc *fontdesc)
{
int i;
fz_try(ctx)
{
for (i = 0; i < 256; i++)
{
if (fontdesc->font->t3procs[i])
{
fz_prepare_t3_glyph(ctx, fontdesc->font, i);
fontdesc->size += 0; // TODO: display list size calculation
}
}
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "Type3 glyph load failed: %s", fz_caught_message(ctx));
}
}
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