static fz_stream *
pdf_open_object_array(fz_context *ctx, pdf_document *doc, pdf_obj *list)
{
fz_stream *stm;
int i, n;
n = pdf_array_len(ctx, list);
stm = fz_open_concat(ctx, n, 1);
fz_var(i); /* Workaround Mac compiler bug */
for (i = 0; i < n; i++)
{
pdf_obj *obj = pdf_array_get(ctx, list, i);
fz_try(ctx)
{
fz_concat_push(ctx, stm, pdf_open_stream(ctx, doc, pdf_to_num(ctx, obj), pdf_to_gen(ctx, obj)));
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "cannot load content stream part %d/%d", i + 1, n);
continue;
}
}
return stm;
}
static boolean fill_input_buffer(j_decompress_ptr cinfo)
{
struct jpeg_source_mgr *src = cinfo->src;
fz_dctd *state = cinfo->client_data;
fz_stream *curr_stm = state->curr_stm;
fz_context *ctx = curr_stm->ctx;
curr_stm->rp = curr_stm->wp;
fz_try(ctx)
{
fz_fill_buffer(curr_stm);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
return 0;
}
src->next_input_byte = curr_stm->rp;
src->bytes_in_buffer = curr_stm->wp - curr_stm->rp;
if (src->bytes_in_buffer == 0)
{
static unsigned char eoi[2] = { 0xFF, JPEG_EOI };
fz_warn(state->ctx, "premature end of file in jpeg");
src->next_input_byte = eoi;
src->bytes_in_buffer = 2;
}
return 1;
}
void
xps_read_page_list(fz_context *ctx, xps_document *doc)
{
xps_fixdoc *fixdoc;
xps_read_and_process_metadata_part(ctx, doc, "/_rels/.rels", NULL);
if (!doc->start_part)
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot find fixed document sequence start part");
xps_read_and_process_metadata_part(ctx, doc, doc->start_part, NULL);
for (fixdoc = doc->first_fixdoc; fixdoc; fixdoc = fixdoc->next)
{
char relbuf[1024];
fz_try(ctx)
{
xps_rels_for_part(ctx, doc, relbuf, fixdoc->name, sizeof relbuf);
xps_read_and_process_metadata_part(ctx, doc, relbuf, fixdoc);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "cannot process FixedDocument rels part");
}
xps_read_and_process_metadata_part(ctx, doc, fixdoc->name, fixdoc);
}
}
void
pdf_update_annot(pdf_document *doc, pdf_annot *annot)
{
/* SumatraPDF: prevent regressions */
#if 0
pdf_obj *obj, *ap, *as, *n;
fz_context *ctx = doc->ctx;
if (doc->update_appearance)
doc->update_appearance(doc, annot);
obj = annot->obj;
ap = pdf_dict_gets(obj, "AP");
as = pdf_dict_gets(obj, "AS");
if (pdf_is_dict(ap))
{
pdf_hotspot *hp = &doc->hotspot;
n = NULL;
if (hp->num == pdf_to_num(obj)
&& hp->gen == pdf_to_gen(obj)
&& (hp->state & HOTSPOT_POINTER_DOWN))
{
n = pdf_dict_gets(ap, "D"); /* down state */
}
if (n == NULL)
n = pdf_dict_gets(ap, "N"); /* normal state */
/* lookup current state in sub-dictionary */
if (!pdf_is_stream(doc, pdf_to_num(n), pdf_to_gen(n)))
n = pdf_dict_get(n, as);
pdf_drop_xobject(ctx, annot->ap);
annot->ap = NULL;
if (pdf_is_stream(doc, pdf_to_num(n), pdf_to_gen(n)))
{
fz_try(ctx)
{
annot->ap = pdf_load_xobject(doc, n);
pdf_transform_annot(annot);
annot->ap_iteration = annot->ap->iteration;
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "ignoring broken annotation");
}
}
}
#endif
}
static void
pdf_load_font_descriptor(pdf_font_desc *fontdesc, pdf_document *doc, pdf_obj *dict, char *collection, char *basefont, int iscidfont, int has_encoding)
{
pdf_obj *obj1, *obj2, *obj3, *obj;
char *fontname, *origname;
FT_Face face;
fz_context *ctx = doc->ctx;
/* Prefer BaseFont; don't bother with FontName */
origname = basefont;
/* SumatraPDF: handle /BaseFont /Arial,Bold+000041 /FontName /Arial,Bold */
if (strchr(basefont, '+') && pdf_is_name(pdf_dict_gets(dict, "FontName")))
origname = pdf_to_name(pdf_dict_gets(dict, "FontName"));
/* cf. http://code.google.com/p/sumatrapdf/issues/detail?id=1616 */
if (strlen(origname) > 7 && origname[6] == '+')
origname += 7;
/* Look through list of alternate names for built in fonts */
fontname = clean_font_name(origname);
fontdesc->flags = pdf_to_int(pdf_dict_gets(dict, "Flags"));
fontdesc->italic_angle = pdf_to_real(pdf_dict_gets(dict, "ItalicAngle"));
fontdesc->ascent = pdf_to_real(pdf_dict_gets(dict, "Ascent"));
fontdesc->descent = pdf_to_real(pdf_dict_gets(dict, "Descent"));
fontdesc->cap_height = pdf_to_real(pdf_dict_gets(dict, "CapHeight"));
fontdesc->x_height = pdf_to_real(pdf_dict_gets(dict, "XHeight"));
fontdesc->missing_width = pdf_to_real(pdf_dict_gets(dict, "MissingWidth"));
obj1 = pdf_dict_gets(dict, "FontFile");
obj2 = pdf_dict_gets(dict, "FontFile2");
obj3 = pdf_dict_gets(dict, "FontFile3");
obj = obj1 ? obj1 : obj2 ? obj2 : obj3;
if (pdf_is_indirect(obj))
{
fz_try(ctx)
{
pdf_load_embedded_font(doc, fontdesc, fontname, obj);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "ignored error when loading embedded font; attempting to load system font");
if (origname != fontname && !iscidfont)
pdf_load_builtin_font(ctx, fontdesc, fontname);
else
pdf_load_system_font(ctx, fontdesc, fontname, collection, has_encoding);
}
}
else
{
if (origname != fontname && !iscidfont)
void
pdf_update_annot(fz_context *ctx, pdf_document *doc, pdf_annot *annot)
{
pdf_obj *obj, *ap, *as, *n;
if (doc->update_appearance)
doc->update_appearance(ctx, doc, annot);
obj = annot->obj;
ap = pdf_dict_get(ctx, obj, PDF_NAME_AP);
as = pdf_dict_get(ctx, obj, PDF_NAME_AS);
if (pdf_is_dict(ctx, ap))
{
pdf_hotspot *hp = &doc->hotspot;
n = NULL;
if (hp->num == pdf_to_num(ctx, obj)
&& hp->gen == pdf_to_gen(ctx, obj)
&& (hp->state & HOTSPOT_POINTER_DOWN))
{
n = pdf_dict_get(ctx, ap, PDF_NAME_D); /* down state */
}
if (n == NULL)
n = pdf_dict_get(ctx, ap, PDF_NAME_N); /* normal state */
/* lookup current state in sub-dictionary */
if (!pdf_is_stream(ctx, doc, pdf_to_num(ctx, n), pdf_to_gen(ctx, n)))
n = pdf_dict_get(ctx, n, as);
pdf_drop_xobject(ctx, annot->ap);
annot->ap = NULL;
if (pdf_is_stream(ctx, doc, pdf_to_num(ctx, n), pdf_to_gen(ctx, n)))
{
fz_try(ctx)
{
annot->ap = pdf_load_xobject(ctx, doc, n);
pdf_transform_annot(ctx, annot);
annot->ap_iteration = annot->ap->iteration;
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "ignoring broken annotation");
}
}
}
}
static void
pdf_load_font_descriptor(pdf_font_desc *fontdesc, pdf_document *doc, pdf_obj *dict, char *collection, char *basefont, int iscidfont)
{
pdf_obj *obj1, *obj2, *obj3, *obj;
char *fontname, *origname;
FT_Face face;
fz_context *ctx = doc->ctx;
/* Prefer BaseFont; don't bother with FontName */
origname = basefont;
/* Look through list of alternate names for built in fonts */
fontname = clean_font_name(origname);
fontdesc->flags = pdf_to_int(pdf_dict_gets(dict, "Flags"));
fontdesc->italic_angle = pdf_to_real(pdf_dict_gets(dict, "ItalicAngle"));
fontdesc->ascent = pdf_to_real(pdf_dict_gets(dict, "Ascent"));
fontdesc->descent = pdf_to_real(pdf_dict_gets(dict, "Descent"));
fontdesc->cap_height = pdf_to_real(pdf_dict_gets(dict, "CapHeight"));
fontdesc->x_height = pdf_to_real(pdf_dict_gets(dict, "XHeight"));
fontdesc->missing_width = pdf_to_real(pdf_dict_gets(dict, "MissingWidth"));
obj1 = pdf_dict_gets(dict, "FontFile");
obj2 = pdf_dict_gets(dict, "FontFile2");
obj3 = pdf_dict_gets(dict, "FontFile3");
obj = obj1 ? obj1 : obj2 ? obj2 : obj3;
if (pdf_is_indirect(obj))
{
fz_try(ctx)
{
pdf_load_embedded_font(doc, fontdesc, fontname, obj);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "ignored error when loading embedded font; attempting to load system font");
if (origname != fontname && !iscidfont)
pdf_load_builtin_font(ctx, fontdesc, fontname);
else
pdf_load_system_font(ctx, fontdesc, fontname, collection);
}
}
else
{
if (origname != fontname && !iscidfont)
void pdf_load_type3_glyphs(fz_context *ctx, pdf_document *doc, pdf_font_desc *fontdesc, int nested_depth)
{
int i;
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_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "Type3 glyph load failed: %s", fz_caught_message(ctx));
}
}
fz_link *
pdf_load_link_annots(fz_context *ctx, pdf_document *doc, pdf_obj *annots, int pagenum, const fz_matrix *page_ctm)
{
fz_link *link, *head, *tail;
pdf_obj *obj;
int i, n;
head = tail = NULL;
link = NULL;
n = pdf_array_len(ctx, annots);
for (i = 0; i < n; i++)
{
/* FIXME: Move the try/catch out of the loop for performance? */
fz_try(ctx)
{
obj = pdf_array_get(ctx, annots, i);
link = pdf_load_link(ctx, doc, obj, pagenum, page_ctm);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
link = NULL;
}
if (link)
{
if (!head)
head = tail = link;
else
{
tail->next = link;
tail = link;
}
}
}
return head;
}
fz_font *
xps_lookup_font(fz_context *ctx, xps_document *doc, char *base_uri, char *font_uri, char *style_att)
{
char partname[1024];
char fakename[1024];
char *subfont;
int subfontid = 0;
xps_part *part;
fz_font *font;
xps_resolve_url(ctx, doc, partname, base_uri, font_uri, sizeof partname);
subfont = strrchr(partname, '#');
if (subfont)
{
subfontid = atoi(subfont + 1);
*subfont = 0;
}
/* Make a new part name for font with style simulation applied */
fz_strlcpy(fakename, partname, sizeof fakename);
if (style_att)
{
if (!strcmp(style_att, "BoldSimulation"))
fz_strlcat(fakename, "#Bold", sizeof fakename);
else if (!strcmp(style_att, "ItalicSimulation"))
fz_strlcat(fakename, "#Italic", sizeof fakename);
else if (!strcmp(style_att, "BoldItalicSimulation"))
fz_strlcat(fakename, "#BoldItalic", sizeof fakename);
}
font = xps_lookup_font_imp(ctx, doc, fakename);
if (!font)
{
fz_buffer *buf = NULL;
fz_var(buf);
fz_try(ctx)
{
part = xps_read_part(ctx, doc, partname);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "cannot find font resource part '%s'", partname);
return NULL;
}
/* deobfuscate if necessary */
if (strstr(part->name, ".odttf"))
xps_deobfuscate_font_resource(ctx, doc, part);
if (strstr(part->name, ".ODTTF"))
xps_deobfuscate_font_resource(ctx, doc, part);
fz_try(ctx)
{
buf = fz_new_buffer_from_data(ctx, part->data, part->size);
/* part->data is now owned by buf */
part->data = NULL;
font = fz_new_font_from_buffer(ctx, NULL, buf, subfontid, 1);
}
fz_always(ctx)
{
fz_drop_buffer(ctx, buf);
xps_drop_part(ctx, doc, part);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "cannot load font resource '%s'", partname);
return NULL;
}
if (style_att)
{
font->ft_bold = !!strstr(style_att, "Bold");
font->ft_italic = !!strstr(style_att, "Italic");
}
xps_select_best_font_encoding(ctx, doc, font);
xps_insert_font(ctx, doc, fakename, font);
}
void
xps_parse_glyphs(fz_context *ctx, xps_document *doc, const fz_matrix *ctm,
char *base_uri, xps_resource *dict, fz_xml *root)
{
fz_device *dev = doc->dev;
fz_xml *node;
char *fill_uri;
char *opacity_mask_uri;
char *bidi_level_att;
char *fill_att;
char *font_size_att;
char *font_uri_att;
char *origin_x_att;
char *origin_y_att;
char *is_sideways_att;
char *indices_att;
char *unicode_att;
char *style_att;
char *transform_att;
char *clip_att;
char *opacity_att;
char *opacity_mask_att;
char *navigate_uri_att;
fz_xml *transform_tag = NULL;
fz_xml *clip_tag = NULL;
fz_xml *fill_tag = NULL;
fz_xml *opacity_mask_tag = NULL;
char *fill_opacity_att = NULL;
xps_part *part;
fz_font *font;
char partname[1024];
char fakename[1024];
char *subfont;
float font_size = 10;
int subfontid = 0;
int is_sideways = 0;
int bidi_level = 0;
fz_text *text;
fz_rect area;
fz_matrix local_ctm = *ctm;
/*
* Extract attributes and extended attributes.
*/
bidi_level_att = fz_xml_att(root, "BidiLevel");
fill_att = fz_xml_att(root, "Fill");
font_size_att = fz_xml_att(root, "FontRenderingEmSize");
font_uri_att = fz_xml_att(root, "FontUri");
origin_x_att = fz_xml_att(root, "OriginX");
origin_y_att = fz_xml_att(root, "OriginY");
is_sideways_att = fz_xml_att(root, "IsSideways");
indices_att = fz_xml_att(root, "Indices");
unicode_att = fz_xml_att(root, "UnicodeString");
style_att = fz_xml_att(root, "StyleSimulations");
transform_att = fz_xml_att(root, "RenderTransform");
clip_att = fz_xml_att(root, "Clip");
opacity_att = fz_xml_att(root, "Opacity");
opacity_mask_att = fz_xml_att(root, "OpacityMask");
navigate_uri_att = fz_xml_att(root, "FixedPage.NavigateUri");
for (node = fz_xml_down(root); node; node = fz_xml_next(node))
{
if (fz_xml_is_tag(node, "Glyphs.RenderTransform"))
transform_tag = fz_xml_down(node);
if (fz_xml_is_tag(node, "Glyphs.OpacityMask"))
opacity_mask_tag = fz_xml_down(node);
if (fz_xml_is_tag(node, "Glyphs.Clip"))
clip_tag = fz_xml_down(node);
if (fz_xml_is_tag(node, "Glyphs.Fill"))
fill_tag = fz_xml_down(node);
}
fill_uri = base_uri;
opacity_mask_uri = base_uri;
xps_resolve_resource_reference(ctx, doc, dict, &transform_att, &transform_tag, NULL);
xps_resolve_resource_reference(ctx, doc, dict, &clip_att, &clip_tag, NULL);
xps_resolve_resource_reference(ctx, doc, dict, &fill_att, &fill_tag, &fill_uri);
xps_resolve_resource_reference(ctx, doc, dict, &opacity_mask_att, &opacity_mask_tag, &opacity_mask_uri);
/*
* Check that we have all the necessary information.
*/
if (!font_size_att || !font_uri_att || !origin_x_att || !origin_y_att) {
fz_warn(ctx, "missing attributes in glyphs element");
return;
}
if (!indices_att && !unicode_att)
return; /* nothing to draw */
if (is_sideways_att)
is_sideways = !strcmp(is_sideways_att, "true");
if (bidi_level_att)
bidi_level = atoi(bidi_level_att);
/*
* Find and load the font resource
*/
xps_resolve_url(ctx, doc, partname, base_uri, font_uri_att, sizeof partname);
subfont = strrchr(partname, '#');
if (subfont)
{
subfontid = atoi(subfont + 1);
*subfont = 0;
}
/* Make a new part name for font with style simulation applied */
fz_strlcpy(fakename, partname, sizeof fakename);
if (style_att)
{
if (!strcmp(style_att, "BoldSimulation"))
fz_strlcat(fakename, "#Bold", sizeof fakename);
else if (!strcmp(style_att, "ItalicSimulation"))
fz_strlcat(fakename, "#Italic", sizeof fakename);
else if (!strcmp(style_att, "BoldItalicSimulation"))
fz_strlcat(fakename, "#BoldItalic", sizeof fakename);
}
font = xps_lookup_font(ctx, doc, fakename);
if (!font)
{
fz_buffer *buf = NULL;
fz_var(buf);
fz_try(ctx)
{
part = xps_read_part(ctx, doc, partname);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "cannot find font resource part '%s'", partname);
return;
}
/* deobfuscate if necessary */
if (strstr(part->name, ".odttf"))
xps_deobfuscate_font_resource(ctx, doc, part);
if (strstr(part->name, ".ODTTF"))
xps_deobfuscate_font_resource(ctx, doc, part);
fz_try(ctx)
{
buf = fz_new_buffer_from_data(ctx, part->data, part->size);
/* part->data is now owned by buf */
part->data = NULL;
font = fz_new_font_from_buffer(ctx, NULL, buf, subfontid, 1);
}
fz_always(ctx)
{
fz_drop_buffer(ctx, buf);
xps_drop_part(ctx, doc, part);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "cannot load font resource '%s'", partname);
return;
}
if (style_att)
{
font->ft_bold = !!strstr(style_att, "Bold");
font->ft_italic = !!strstr(style_att, "Italic");
}
xps_select_best_font_encoding(ctx, doc, font);
xps_insert_font(ctx, doc, fakename, font);
}
static pdf_font_desc *
pdf_load_simple_font_by_name(pdf_document *doc, pdf_obj *dict, char *basefont)
{
pdf_obj *descriptor;
pdf_obj *encoding;
pdf_obj *widths;
unsigned short *etable = NULL;
pdf_font_desc *fontdesc = NULL;
char *subtype;
FT_Face face;
FT_CharMap cmap;
int symbolic;
int kind;
char *estrings[256];
char ebuffer[256][32];
int i, k, n;
int fterr;
int has_lock = 0;
fz_context *ctx = doc->ctx;
fz_var(fontdesc);
fz_var(etable);
fz_var(has_lock);
/* Load font file */
fz_try(ctx)
{
fontdesc = pdf_new_font_desc(ctx);
descriptor = pdf_dict_gets(dict, "FontDescriptor");
if (descriptor)
pdf_load_font_descriptor(fontdesc, doc, descriptor, NULL, basefont, 0);
else
pdf_load_builtin_font(ctx, fontdesc, basefont);
/* Some chinese documents mistakenly consider WinAnsiEncoding to be codepage 936 */
if (descriptor && pdf_is_string(pdf_dict_gets(descriptor, "FontName")) &&
!pdf_dict_gets(dict, "ToUnicode") &&
!strcmp(pdf_to_name(pdf_dict_gets(dict, "Encoding")), "WinAnsiEncoding") &&
pdf_to_int(pdf_dict_gets(descriptor, "Flags")) == 4)
{
char *cp936fonts[] = {
"\xCB\xCE\xCC\xE5", "SimSun,Regular",
"\xBA\xDA\xCC\xE5", "SimHei,Regular",
"\xBF\xAC\xCC\xE5_GB2312", "SimKai,Regular",
"\xB7\xC2\xCB\xCE_GB2312", "SimFang,Regular",
"\xC1\xA5\xCA\xE9", "SimLi,Regular",
NULL
};
for (i = 0; cp936fonts[i]; i += 2)
if (!strcmp(basefont, cp936fonts[i]))
break;
if (cp936fonts[i])
{
fz_warn(ctx, "workaround for S22PDF lying about chinese font encodings");
pdf_drop_font(ctx, fontdesc);
fontdesc = NULL;
fontdesc = pdf_new_font_desc(ctx);
pdf_load_font_descriptor(fontdesc, doc, descriptor, "Adobe-GB1", cp936fonts[i+1], 0);
fontdesc->encoding = pdf_load_system_cmap(ctx, "GBK-EUC-H");
fontdesc->to_unicode = pdf_load_system_cmap(ctx, "Adobe-GB1-UCS2");
fontdesc->to_ttf_cmap = pdf_load_system_cmap(ctx, "Adobe-GB1-UCS2");
face = fontdesc->font->ft_face;
/* kind = ft_kind(face); */
goto skip_encoding;
}
}
face = fontdesc->font->ft_face;
kind = ft_kind(face);
/* Encoding */
symbolic = fontdesc->flags & 4;
if (face->num_charmaps > 0)
cmap = face->charmaps[0];
else
cmap = NULL;
for (i = 0; i < face->num_charmaps; i++)
{
FT_CharMap test = face->charmaps[i];
if (kind == TYPE1)
{
if (test->platform_id == 7)
cmap = test;
}
if (kind == TRUETYPE)
{
if (test->platform_id == 1 && test->encoding_id == 0)
cmap = test;
if (test->platform_id == 3 && test->encoding_id == 1)
cmap = test;
if (symbolic && test->platform_id == 3 && test->encoding_id == 0)
cmap = test;
}
}
if (cmap)
{
fterr = FT_Set_Charmap(face, cmap);
if (fterr)
fz_warn(ctx, "freetype could not set cmap: %s", ft_error_string(fterr));
}
else
fz_warn(ctx, "freetype could not find any cmaps");
etable = fz_malloc_array(ctx, 256, sizeof(unsigned short));
fontdesc->size += 256 * sizeof(unsigned short);
for (i = 0; i < 256; i++)
{
estrings[i] = NULL;
etable[i] = 0;
}
encoding = pdf_dict_gets(dict, "Encoding");
if (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));
else if (!fontdesc->is_embedded && !symbolic)
pdf_load_encoding(estrings, "StandardEncoding");
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);
}
}
}
}
/* start with the builtin encoding */
for (i = 0; i < 256; i++)
etable[i] = ft_char_index(face, i);
fz_lock(ctx, FZ_LOCK_FREETYPE);
has_lock = 1;
/* built-in and substitute fonts may be a different type than what the document expects */
subtype = pdf_to_name(pdf_dict_gets(dict, "Subtype"));
if (!strcmp(subtype, "Type1"))
kind = TYPE1;
else if (!strcmp(subtype, "MMType1"))
kind = TYPE1;
else if (!strcmp(subtype, "TrueType"))
kind = TRUETYPE;
else if (!strcmp(subtype, "CIDFontType0"))
kind = TYPE1;
else if (!strcmp(subtype, "CIDFontType2"))
kind = TRUETYPE;
/* encode by glyph name where we can */
if (kind == TYPE1)
{
for (i = 0; i < 256; i++)
{
if (estrings[i])
{
etable[i] = FT_Get_Name_Index(face, estrings[i]);
if (etable[i] == 0)
{
int aglcode = pdf_lookup_agl(estrings[i]);
const char **dupnames = pdf_lookup_agl_duplicates(aglcode);
while (*dupnames)
{
etable[i] = FT_Get_Name_Index(face, (char*)*dupnames);
if (etable[i])
break;
dupnames++;
}
if (etable[i] == 0)
{
char buf[10];
sprintf(buf, "uni%04X", aglcode);
etable[i] = FT_Get_Name_Index(face, buf);
}
}
}
}
}
/* encode by glyph name where we can */
if (kind == TRUETYPE)
{
/* Unicode cmap */
if (!symbolic && face->charmap && face->charmap->platform_id == 3)
{
for (i = 0; i < 256; i++)
{
if (estrings[i])
{
int aglcode = pdf_lookup_agl(estrings[i]);
if (!aglcode)
etable[i] = FT_Get_Name_Index(face, estrings[i]);
else
etable[i] = ft_char_index(face, aglcode);
}
}
}
/* MacRoman cmap */
else if (!symbolic && face->charmap && face->charmap->platform_id == 1)
{
for (i = 0; i < 256; i++)
{
if (estrings[i])
{
k = lookup_mre_code(estrings[i]);
if (k <= 0)
etable[i] = FT_Get_Name_Index(face, estrings[i]);
else
etable[i] = ft_char_index(face, k);
}
}
}
/* Symbolic cmap */
else if (!face->charmap || face->charmap->encoding != FT_ENCODING_MS_SYMBOL)
{
for (i = 0; i < 256; i++)
{
if (estrings[i])
{
etable[i] = FT_Get_Name_Index(face, estrings[i]);
if (etable[i] == 0)
etable[i] = ft_char_index(face, i);
}
}
}
}
/* try to reverse the glyph names from the builtin encoding */
for (i = 0; i < 256; i++)
{
if (etable[i] && !estrings[i])
{
if (FT_HAS_GLYPH_NAMES(face))
{
fterr = FT_Get_Glyph_Name(face, etable[i], ebuffer[i], 32);
if (fterr)
fz_warn(ctx, "freetype get glyph name (gid %d): %s", etable[i], ft_error_string(fterr));
if (ebuffer[i][0])
estrings[i] = ebuffer[i];
}
else
{
estrings[i] = (char*) pdf_win_ansi[i]; /* discard const */
}
}
}
/* symbolic Type 1 fonts with an implicit encoding and non-standard glyph names */
if (kind == TYPE1 && symbolic)
{
for (i = 0; i < 256; i++)
if (etable[i] && estrings[i] && !pdf_lookup_agl(estrings[i]))
estrings[i] = (char*) pdf_standard[i];
}
fz_unlock(ctx, FZ_LOCK_FREETYPE);
has_lock = 0;
fontdesc->encoding = pdf_new_identity_cmap(ctx, 0, 1);
fontdesc->size += pdf_cmap_size(ctx, fontdesc->encoding);
fontdesc->cid_to_gid_len = 256;
fontdesc->cid_to_gid = etable;
fz_try(ctx)
{
pdf_load_to_unicode(doc, fontdesc, estrings, NULL, pdf_dict_gets(dict, "ToUnicode"));
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "cannot load ToUnicode CMap");
}
skip_encoding:
/* Widths */
pdf_set_default_hmtx(ctx, fontdesc, fontdesc->missing_width);
widths = pdf_dict_gets(dict, "Widths");
if (widths)
{
int first, last;
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;
for (i = 0; i < last - first + 1; i++)
{
int wid = pdf_to_int(pdf_array_get(widths, i));
pdf_add_hmtx(ctx, fontdesc, i + first, i + first, wid);
}
}
else
{
fz_lock(ctx, FZ_LOCK_FREETYPE);
has_lock = 1;
fterr = FT_Set_Char_Size(face, 1000, 1000, 72, 72);
if (fterr)
fz_warn(ctx, "freetype set character size: %s", ft_error_string(fterr));
for (i = 0; i < 256; i++)
{
pdf_add_hmtx(ctx, fontdesc, i, i, ft_width(ctx, fontdesc, i));
}
fz_unlock(ctx, FZ_LOCK_FREETYPE);
has_lock = 0;
}
pdf_end_hmtx(ctx, fontdesc);
}
fz_catch(ctx)
{
if (has_lock)
fz_unlock(ctx, FZ_LOCK_FREETYPE);
if (fontdesc && etable != fontdesc->cid_to_gid)
fz_free(ctx, etable);
pdf_drop_font(ctx, fontdesc);
fz_rethrow_message(ctx, "cannot load simple font (%d %d R)", pdf_to_num(dict), pdf_to_gen(dict));
}
return fontdesc;
}
int
pdf_repair_obj(fz_context *ctx, pdf_document *doc, pdf_lexbuf *buf, fz_off_t *stmofsp, int *stmlenp, pdf_obj **encrypt, pdf_obj **id, pdf_obj **page, fz_off_t *tmpofs, pdf_obj **root)
{
fz_stream *file = doc->file;
pdf_token tok;
int stm_len;
*stmofsp = 0;
if (stmlenp)
*stmlenp = -1;
stm_len = 0;
/* On entry to this function, we know that we've just seen
* '<int> <int> obj'. We expect the next thing we see to be a
* pdf object. Regardless of the type of thing we meet next
* we only need to fully parse it if it is a dictionary. */
tok = pdf_lex(ctx, file, buf);
if (tok == PDF_TOK_OPEN_DICT)
{
pdf_obj *dict, *obj;
fz_try(ctx)
{
dict = pdf_parse_dict(ctx, doc, file, buf);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
/* Don't let a broken object at EOF overwrite a good one */
if (file->eof)
fz_rethrow(ctx);
/* Silently swallow the error */
dict = pdf_new_dict(ctx, NULL, 2);
}
/* We must be careful not to try to resolve any indirections
* here. We have just read dict, so we know it to be a non
* indirected dictionary. Before we look at any values that
* we get back from looking up in it, we need to check they
* aren't indirected. */
if (encrypt || id || root)
{
obj = pdf_dict_get(ctx, dict, PDF_NAME_Type);
if (!pdf_is_indirect(ctx, obj) && pdf_name_eq(ctx, obj, PDF_NAME_XRef))
{
if (encrypt)
{
obj = pdf_dict_get(ctx, dict, PDF_NAME_Encrypt);
if (obj)
{
pdf_drop_obj(ctx, *encrypt);
*encrypt = pdf_keep_obj(ctx, obj);
}
}
if (id)
{
obj = pdf_dict_get(ctx, dict, PDF_NAME_ID);
if (obj)
{
pdf_drop_obj(ctx, *id);
*id = pdf_keep_obj(ctx, obj);
}
}
if (root)
*root = pdf_keep_obj(ctx, pdf_dict_get(ctx, dict, PDF_NAME_Root));
}
}
obj = pdf_dict_get(ctx, dict, PDF_NAME_Length);
if (!pdf_is_indirect(ctx, obj) && pdf_is_int(ctx, obj))
stm_len = pdf_to_int(ctx, obj);
if (doc->file_reading_linearly && page)
{
obj = pdf_dict_get(ctx, dict, PDF_NAME_Type);
if (!pdf_is_indirect(ctx, obj) && pdf_name_eq(ctx, obj, PDF_NAME_Page))
{
pdf_drop_obj(ctx, *page);
*page = pdf_keep_obj(ctx, dict);
}
}
pdf_drop_obj(ctx, dict);
}
static fz_xml *
xps_load_fixed_page(fz_context *ctx, xps_document *doc, xps_fixpage *page)
{
xps_part *part;
fz_xml *root;
char *width_att;
char *height_att;
part = xps_read_part(ctx, doc, page->name);
fz_try(ctx)
{
root = fz_parse_xml(ctx, part->data, part->size, 0);
}
fz_always(ctx)
{
xps_drop_part(ctx, doc, part);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
root = NULL;
}
if (!root)
fz_throw(ctx, FZ_ERROR_GENERIC, "FixedPage missing root element");
if (fz_xml_is_tag(root, "AlternateContent"))
{
fz_xml *node = xps_lookup_alternate_content(ctx, doc, root);
if (!node)
{
fz_drop_xml(ctx, root);
fz_throw(ctx, FZ_ERROR_GENERIC, "FixedPage missing alternate root element");
}
fz_detach_xml(node);
fz_drop_xml(ctx, root);
root = node;
}
if (!fz_xml_is_tag(root, "FixedPage"))
{
fz_drop_xml(ctx, root);
fz_throw(ctx, FZ_ERROR_GENERIC, "expected FixedPage element");
}
width_att = fz_xml_att(root, "Width");
if (!width_att)
{
fz_drop_xml(ctx, root);
fz_throw(ctx, FZ_ERROR_GENERIC, "FixedPage missing required attribute: Width");
}
height_att = fz_xml_att(root, "Height");
if (!height_att)
{
fz_drop_xml(ctx, root);
fz_throw(ctx, FZ_ERROR_GENERIC, "FixedPage missing required attribute: Height");
}
page->width = atoi(width_att);
page->height = atoi(height_att);
return root;
}
fz_pixmap *
fz_decomp_image_from_stream(fz_context *ctx, fz_stream *stm, fz_image *image, int in_line, int indexed, int l2factor, int native_l2factor)
{
fz_pixmap *tile = NULL;
int stride, len, i;
unsigned char *samples = NULL;
int f = 1<<native_l2factor;
int w = (image->w + f-1) >> native_l2factor;
int h = (image->h + f-1) >> native_l2factor;
fz_var(tile);
fz_var(samples);
fz_try(ctx)
{
tile = fz_new_pixmap(ctx, image->colorspace, w, h);
tile->interpolate = image->interpolate;
stride = (w * image->n * image->bpc + 7) / 8;
samples = fz_malloc_array(ctx, h, stride);
len = fz_read(stm, samples, h * stride);
if (len < 0)
{
fz_throw(ctx, FZ_ERROR_GENERIC, "cannot read image data");
}
/* Make sure we read the EOF marker (for inline images only) */
if (in_line)
{
unsigned char tbuf[512];
fz_try(ctx)
{
int tlen = fz_read(stm, tbuf, sizeof tbuf);
if (tlen > 0)
fz_warn(ctx, "ignoring garbage at end of image");
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
fz_warn(ctx, "ignoring error at end of image");
}
}
/* Pad truncated images */
if (len < stride * h)
{
fz_warn(ctx, "padding truncated image");
memset(samples + len, 0, stride * h - len);
}
/* Invert 1-bit image masks */
if (image->imagemask)
{
/* 0=opaque and 1=transparent so we need to invert */
unsigned char *p = samples;
len = h * stride;
for (i = 0; i < len; i++)
p[i] = ~p[i];
}
fz_unpack_tile(tile, samples, image->n, image->bpc, stride, indexed);
fz_free(ctx, samples);
samples = NULL;
if (image->usecolorkey)
fz_mask_color_key(tile, image->n, image->colorkey);
if (indexed)
{
fz_pixmap *conv;
fz_decode_indexed_tile(tile, image->decode, (1 << image->bpc) - 1);
conv = fz_expand_indexed_pixmap(ctx, tile);
fz_drop_pixmap(ctx, tile);
tile = conv;
}
else
{
fz_decode_tile(tile, image->decode);
}
}
fz_always(ctx)
{
fz_close(stm);
}
fz_catch(ctx)
{
if (tile)
fz_drop_pixmap(ctx, tile);
fz_free(ctx, samples);
fz_rethrow(ctx);
}
/* Now apply any extra subsampling required */
if (l2factor - native_l2factor > 0)
{
if (l2factor - native_l2factor > 8)
l2factor = native_l2factor + 8;
fz_subsample_pixmap(ctx, tile, l2factor - native_l2factor);
}
return tile;
}