diff options
author | Sebastian Rasmussen <sebras@gmail.com> | 2017-04-27 01:23:55 +0800 |
---|---|---|
committer | Sebastian Rasmussen <sebras@gmail.com> | 2017-04-28 00:02:15 +0800 |
commit | c235ea59cab9ffa1b309b3d3c1429cc409d3f035 (patch) | |
tree | 32c95c3b728cfc3d45a61e4d499ba81402f4dbe0 /source | |
parent | 8a89324871aaab6c918520af5815f80f18e019d8 (diff) | |
download | mupdf-c235ea59cab9ffa1b309b3d3c1429cc409d3f035.tar.xz |
Add support for manipulating PDF annotation vertices.
Diffstat (limited to 'source')
-rw-r--r-- | source/pdf/pdf-annot-edit.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/source/pdf/pdf-annot-edit.c b/source/pdf/pdf-annot-edit.c index 21620153..0dada7f2 100644 --- a/source/pdf/pdf-annot-edit.c +++ b/source/pdf/pdf-annot-edit.c @@ -531,6 +531,70 @@ pdf_set_annot_interior_color(fz_context *ctx, pdf_annot *annot, int n, const flo pdf_set_annot_color_imp(ctx, annot, PDF_NAME_IC, n, color, interior_color_subtypes); } +static pdf_obj *vertices_subtypes[] = { + PDF_NAME_PolyLine, + PDF_NAME_Polygon, + NULL, +}; + +int +pdf_annot_vertex_count(fz_context *ctx, pdf_annot *annot) +{ + pdf_obj *vertices; + check_allowed_subtypes(ctx, annot, PDF_NAME_Vertices, vertices_subtypes); + vertices = pdf_dict_get(ctx, annot->obj, PDF_NAME_Vertices); + return pdf_array_len(ctx, vertices) / 2; +} + +void +pdf_annot_vertex(fz_context *ctx, pdf_annot *annot, int i, float v[2]) +{ + pdf_obj *vertices; + fz_matrix page_ctm; + fz_point point; + + check_allowed_subtypes(ctx, annot, PDF_NAME_Vertices, vertices_subtypes); + + vertices = pdf_dict_get(ctx, annot->obj, PDF_NAME_Vertices); + + pdf_page_transform(ctx, annot->page, NULL, &page_ctm); + + point.x = pdf_to_real(ctx, pdf_array_get(ctx, vertices, i * 2)); + point.y = pdf_to_real(ctx, pdf_array_get(ctx, vertices, i * 2 + 1)); + fz_transform_point(&point, &page_ctm); + v[0] = point.x; + v[1] = point.y; +} + +void +pdf_set_annot_vertices(fz_context *ctx, pdf_annot *annot, int n, const float *v) +{ + pdf_document *doc = annot->page->doc; + fz_matrix page_ctm, inv_page_ctm; + pdf_obj *vertices; + fz_point point; + int i; + + check_allowed_subtypes(ctx, annot, PDF_NAME_Vertices, vertices_subtypes); + if (n <= 0 || !v) + fz_throw(ctx, FZ_ERROR_GENERIC, "invalid number of vertices"); + + pdf_page_transform(ctx, annot->page, NULL, &page_ctm); + fz_invert_matrix(&inv_page_ctm, &page_ctm); + + vertices = pdf_new_array(ctx, doc, n * 2); + for (i = 0; i < n; ++i) + { + point.x = v[i * 2]; + point.y = v[i * 2 + 1]; + fz_transform_point(&point, &inv_page_ctm); + pdf_array_push_drop(ctx, vertices, pdf_new_real(ctx, doc, point.x)); + pdf_array_push_drop(ctx, vertices, pdf_new_real(ctx, doc, point.y)); + } + pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_Vertices, vertices); + annot->changed = 1; +} + static pdf_obj *quad_point_subtypes[] = { PDF_NAME_Highlight, PDF_NAME_Link, |