diff options
Diffstat (limited to 'pdf')
| -rw-r--r-- | pdf/pdf_write.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/pdf/pdf_write.c b/pdf/pdf_write.c index 8334e92a..566b9c0e 100644 --- a/pdf/pdf_write.c +++ b/pdf/pdf_write.c @@ -1514,6 +1514,34 @@ static void expandstream(pdf_document *xref, pdf_write_options *opts, pdf_obj *o pdf_drop_obj(obj); } +static int is_image_filter(char *s) +{ + if ( !strcmp(s, "CCITTFaxDecode") || !strcmp(s, "CCF") || + !strcmp(s, "DCTDecode") || !strcmp(s, "DCT") || + !strcmp(s, "RunLengthDecode") || !strcmp(s, "RL") || + !strcmp(s, "JBIG2Decode") || + !strcmp(s, "JPXDecode")) + return 1; + return 0; +} + +static int filter_implies_image(pdf_document *xref, pdf_obj *o) +{ + if (!o) + return 0; + if (pdf_is_name(o)) + return is_image_filter(pdf_to_name(o)); + if (pdf_is_array(o)) + { + int i, len; + len = pdf_array_len(o); + for (i = 0; i < len; i++) + if (is_image_filter(pdf_to_name(pdf_array_get(o, i)))) + return 1; + } + return 0; +} + static void writeobject(pdf_document *xref, pdf_write_options *opts, int num, int gen) { pdf_obj *obj; @@ -1576,6 +1604,10 @@ static void writeobject(pdf_document *xref, pdf_write_options *opts, int num, in dontexpand = !(opts->do_expand & fz_expand_fonts); if (o = pdf_dict_gets(obj, "Subtype"), !strcmp(pdf_to_name(o), "CIDFontType0C")) dontexpand = !(opts->do_expand & fz_expand_fonts); + if (o = pdf_dict_gets(obj, "Filter"), filter_implies_image(xref, o)) + dontexpand = !(opts->do_expand & fz_expand_images); + if (pdf_dict_gets(obj, "Width") != NULL && pdf_dict_gets(obj, "Height") != NULL) + dontexpand = !(opts->do_expand & fz_expand_images); } if (opts->do_expand && !dontexpand && !pdf_is_jpx_image(ctx, obj)) expandstream(xref, opts, obj, num, gen); |