Modify marker transform to accept user defined marker symbols - gsl-shell.git - gsl-shell

diff --git a/agg-plot/agg-parse-trans.cpp b/agg-plot/agg-parse-trans.cpp
index 4ae1cdbc..47ccdbe5 100644
--- a/agg-plot/agg-parse-trans.cpp
+++ b/agg-plot/agg-parse-trans.cpp

@@ -91,11 +91,24 @@ sg_object* build_curve (lua_State *L, int specindex, sg_object* src)

sg_object* build_marker (lua_State *L, int specindex, sg_object* src)

{

- double size = mlua_named_optnumber (L, specindex, "size", 3.0);

- const char *sym_name = mlua_named_optstring (L, specindex, "mark", "circle");

- sg_object* sym = new_marker_symbol(sym_name);

- trans::marker* m = new trans::marker(src, size, sym);

- return m;

+ double size = mlua_named_optnumber(L, specindex, "size", 3.0);

+

+ lua_getfield(L, specindex, "mark");

+ const char *sym_name = lua_tostring(L, -1);

+

+ sg_object *sym;

+ if (!sym_name && gs_is_userdata(L, -1, GS_DRAW_SCALABLE))

+ {

+ sg_object* obj = (sg_object*) lua_touserdata(L, -1);

+ sym = new trans::scaling_a(obj);

+ }

+ else

+ {

+ sym = new_marker_symbol(sym_name ? sym_name : "circle");

+ }

+ lua_pop(L, 1);

+

+ return new trans::marker(src, size, sym);

}

sg_object* build_dash (lua_State *L, int specindex, sg_object* src)