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| author | Paul Gardiner <paulg.artifex@glidos.net> | 2013-08-05 14:25:20 +0100 |
|---|---|---|
| committer | Paul Gardiner <paulg.artifex@glidos.net> | 2013-08-13 16:35:58 +0100 |
| commit | 8d5ef1952803d060c8042de274fa7f59f1cdb66e (patch) | |
| tree | d71f1f0cb302ca914c35ca4cb83b4f146dd0e818 /source/pdf | |
| parent | 861f5f95873f79a564e7146662c3aa600bb07513 (diff) | |
| download | mupdf-8d5ef1952803d060c8042de274fa7f59f1cdb66e.tar.xz | |
Insert the extra layers required for a signature-appearance stream
Diffstat (limited to 'source/pdf')
| -rw-r--r-- | source/pdf/pdf-appearance.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/source/pdf/pdf-appearance.c b/source/pdf/pdf-appearance.c index e7d8a65b..e91b699e 100644 --- a/source/pdf/pdf-appearance.c +++ b/source/pdf/pdf-appearance.c @@ -1873,6 +1873,67 @@ static void center_rect_within_rect(const fz_rect *tofit, const fz_rect *within, fz_pre_translate(mat, -tofit_center.x, -tofit_center.y); } +static void insert_signature_appearance_layers(pdf_document *doc, pdf_annot *annot) +{ + fz_context *ctx = doc->ctx; + pdf_obj *ap = pdf_dict_getp(annot->obj, "AP/N"); + pdf_obj *main = NULL; + pdf_obj *frm = NULL; + pdf_obj *n0 = NULL; + fz_rect bbox; + fz_buffer *fzbuf = NULL; + + pdf_to_rect(ctx, pdf_dict_gets(ap, "BBox"), &bbox); + + fz_var(main); + fz_var(frm); + fz_var(n0); + fz_var(fzbuf); + fz_try(ctx) + { + main = pdf_new_xobject(doc, &bbox, &fz_identity); + frm = pdf_new_xobject(doc, &bbox, &fz_identity); + n0 = pdf_new_xobject(doc, &bbox, &fz_identity); + + pdf_dict_putp(main, "Resources/XObject/FRM", frm); + fzbuf = fz_new_buffer(ctx, 8); + fz_buffer_printf(ctx, fzbuf, "/FRM Do"); + pdf_update_stream(doc, pdf_to_num(main), fzbuf); + pdf_dict_puts_drop(main, "Length", pdf_new_int(doc, fzbuf->len)); + fz_drop_buffer(ctx, fzbuf); + fzbuf = NULL; + + pdf_dict_putp(frm, "Resources/XObject/n0", n0); + pdf_dict_putp(frm, "Resources/XObject/n2", ap); + fzbuf = fz_new_buffer(ctx, 8); + fz_buffer_printf(ctx, fzbuf, "q 1 0 0 1 0 0 cm /n0 Do Q q 1 0 0 1 0 0 cm /n2 Do Q"); + pdf_update_stream(doc, pdf_to_num(frm), fzbuf); + pdf_dict_puts_drop(frm, "Length", pdf_new_int(doc, fzbuf->len)); + fz_drop_buffer(ctx, fzbuf); + fzbuf = NULL; + + fzbuf = fz_new_buffer(ctx, 8); + fz_buffer_printf(ctx, fzbuf, "%% DSBlank"); + pdf_update_stream(doc, pdf_to_num(n0), fzbuf); + pdf_dict_puts_drop(n0, "Length", pdf_new_int(doc, fzbuf->len)); + fz_drop_buffer(ctx, fzbuf); + fzbuf = NULL; + + pdf_dict_putp(annot->obj, "AP/N", main); + } + fz_always(ctx) + { + pdf_drop_obj(main); + pdf_drop_obj(frm); + pdf_drop_obj(n0); + } + fz_catch(ctx) + { + fz_drop_buffer(ctx, fzbuf); + fz_rethrow(ctx); + } +} + static float logo_color[3] = {1.0f, 0.85f, 0.85f}; void pdf_set_signature_appearance(pdf_document *doc, pdf_annot *annot, char *name, char *dn, char *date) @@ -1956,6 +2017,8 @@ void pdf_set_signature_appearance(pdf_document *doc, pdf_annot *annot, char *nam * force a redraw on next pdf_update_page call */ pdf_drop_xobject(ctx, annot->ap); annot->ap = NULL; + + insert_signature_appearance_layers(doc, annot); } fz_always(ctx) { |