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authorSebastian Rasmussen <sebras@gmail.com>2017-04-27 01:23:55 +0800
committerSebastian Rasmussen <sebras@gmail.com>2017-04-28 00:02:15 +0800
commitc235ea59cab9ffa1b309b3d3c1429cc409d3f035 (patch)
tree32c95c3b728cfc3d45a61e4d499ba81402f4dbe0 /source/pdf
parent8a89324871aaab6c918520af5815f80f18e019d8 (diff)
downloadmupdf-c235ea59cab9ffa1b309b3d3c1429cc409d3f035.tar.xz
Add support for manipulating PDF annotation vertices.
Diffstat (limited to 'source/pdf')
-rw-r--r--source/pdf/pdf-annot-edit.c64
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,