Add tag functions to cairo_t and cairo_surface_t

The cairo_tag_begin/cairo_tag_end API is for supporting hyperlinks and
creating tagged PDF files.

The source, ctm, and stroke style are passed to the backend to allow
these parameters to be used to specify hyperlink border attributes.

1 files changed, 21 insertions, 0 deletions

diff --git a/src/cairo-default-context.c b/src/cairo-default-context.c
index 1e5067bf1..694eecf78 100644
--- a/src/cairo-default-context.c
+++ b/src/cairo-default-context.c
@@ -1156,6 +1156,24 @@ _cairo_default_context_copy_page (void *abstract_cr)
 }
 
 static cairo_status_t
+_cairo_default_context_tag_begin (void *abstract_cr,
+				  const char *tag_name, const char *attributes)
+{
+    cairo_default_context_t *cr = abstract_cr;
+
+    return _cairo_gstate_tag_begin (cr->gstate, tag_name, attributes);
+}
+
+static cairo_status_t
+_cairo_default_context_tag_end (void *abstract_cr,
+				const char *tag_name)
+{
+    cairo_default_context_t *cr = abstract_cr;
+
+    return _cairo_gstate_tag_end (cr->gstate, tag_name);
+}
+
+static cairo_status_t
 _cairo_default_context_show_page (void *abstract_cr)
 {
     cairo_default_context_t *cr = abstract_cr;
@@ -1437,6 +1455,9 @@ static const cairo_backend_t _cairo_default_context_backend = {
 
     _cairo_default_context_copy_page,
     _cairo_default_context_show_page,
+
+    _cairo_default_context_tag_begin,
+    _cairo_default_context_tag_end,
 };
 
 cairo_status_t