return s->expr ();
}
-LY_DEFINE (ly_stencil_get_extent, "ly:stencil-extent",
+LY_DEFINE (ly_stencil_extent, "ly:stencil-extent",
2, 0, 0, (SCM stil, SCM axis),
"Return a pair of numbers signifying the extent of @var{stil} in "
"@var{axis} direction (0 or 1 for x and y axis respectively).")
"They carry two pieces of information: \n\n"
"1: a specification of how to print this object. "
"This specification is processed by the output backends, "
- " for example @file{scm/output-tex.scm}.\n\n"
+ " for example @file{scm/output-ps.scm}.\n\n"
"2: the vertical and horizontal extents of the object.\n\n")
{
+ SCM_ASSERT_TYPE (!scm_is_pair (expr)
+ || is_stencil_head (scm_car (expr)),
+ expr, SCM_ARG1, __FUNCTION__, "registered stencil expression");
+
SCM_ASSERT_TYPE (is_number_pair (xext), xext, SCM_ARG2, __FUNCTION__, "number pair");
SCM_ASSERT_TYPE (is_number_pair (yext), yext, SCM_ARG3, __FUNCTION__, "number pair");
-
+
+
Box b (ly_scm2interval (xext), ly_scm2interval (yext));
Stencil s (b, expr);
return s.smobbed_copy ();
return find_expression_fonts (stil->expr ());
}
+
+LY_DEFINE (ly_stencil_in_color, "ly:stencil-in-color",
+ 4, 0, 0, (SCM stc, SCM r, SCM g, SCM b),
+ "Put @var{stc} in a different color.")
+{
+ Stencil *stil = unsmob_stencil (stc);
+ SCM_ASSERT_TYPE (stil, stc, SCM_ARG1, __FUNCTION__, "Stencil");
+ return Stencil (stil->extent_box (),
+ scm_list_3 (ly_symbol2scm ("color"),
+ scm_list_3 (r, g, b),
+ stil->expr ())).smobbed_copy ();
+}
+
+
struct Stencil_interpret_arguments
{
SCM func;
4, 0, 0, (SCM expr, SCM func, SCM arg1, SCM offset),
"Parse EXPR, feed bits to FUNC with first arg ARG1")
{
- SCM_ASSERT_TYPE (ly_c_procedure_p (func), func, SCM_ARG1, __FUNCTION__,
+ SCM_ASSERT_TYPE (ly_is_procedure (func), func, SCM_ARG1, __FUNCTION__,
"procedure");
Stencil_interpret_arguments a;
scm_to_double (blot)).smobbed_copy ();
}
+
+
+LY_DEFINE (ly_register_stencil_expression, "ly:register-stencil-expression",
+ 1, 0, 0,
+ (SCM symbol),
+ "Add @var{symbol} as head of a stencil expression")
+{
+ SCM_ASSERT_TYPE (scm_is_symbol (symbol), symbol,
+ SCM_ARG1, __FUNCTION__, "Symbol");
+ register_stencil_head (symbol);
+ return SCM_UNSPECIFIED;
+}
+
+LY_DEFINE (ly_all_stencil_expressions, "ly:all-stencil-expressions",
+ 0, 0, 0,
+ (),
+ "Return all symbols recognized as stencil expressions.")
+{
+ return all_stencil_heads ();
+}