- {
- SCM color = scm_cadr (expr);
- SCM r = scm_car (color);
- SCM g = scm_cadr (color);
- SCM b = scm_caddr (color);
-
- (*func) (func_arg, scm_list_4 (ly_symbol2scm ("setcolor"), r, g, b));
- interpret_stencil_expression (scm_caddr (expr), func, func_arg, o);
- (*func) (func_arg, scm_list_1 (ly_symbol2scm ("resetcolor")));
-
- return;
- }
+ {
+ SCM color = scm_cadr (expr);
+ SCM r = scm_car (color);
+ SCM g = scm_cadr (color);
+ SCM b = scm_caddr (color);
+
+ (*func) (func_arg, scm_list_4 (ly_symbol2scm ("setcolor"), r, g, b));
+ interpret_stencil_expression (scm_caddr (expr), func, func_arg, o);
+ (*func) (func_arg, scm_list_1 (ly_symbol2scm ("resetcolor")));
+
+ return;
+ }
+ else if (head == ly_symbol2scm ("id"))
+ {
+ SCM id = scm_cadr (expr);
+
+ (*func) (func_arg, scm_list_2 (ly_symbol2scm ("start-enclosing-id-node"), id));
+ interpret_stencil_expression (scm_caddr (expr), func, func_arg, o);
+ (*func) (func_arg, scm_list_1 (ly_symbol2scm ("end-enclosing-id-node")));
+
+ return;
+ }
+ else if (head == ly_symbol2scm ("rotate-stencil"))
+ {
+ SCM args = scm_cadr (expr);
+ SCM angle = scm_car (args);
+ Offset tmp = o + robust_scm2offset (scm_cadr (args), Offset (0.0, 0.0));
+
+ SCM offset = ly_offset2scm (tmp);
+ SCM x = scm_car (offset);
+ SCM y = scm_cdr (offset);
+
+ (*func) (func_arg, scm_list_4 (ly_symbol2scm ("setrotation"), angle, x, y));
+ interpret_stencil_expression (scm_caddr (expr), func, func_arg, o);
+ (*func) (func_arg, scm_list_4 (ly_symbol2scm ("resetrotation"), angle, x, y));
+
+ return;
+ }
+ else if (head == ly_symbol2scm ("scale-stencil"))
+ {
+ SCM args = scm_cadr (expr);
+ SCM x_scale = scm_car (args);
+ SCM y_scale = scm_cadr (args);
+ Offset unscaled = o.scale (Offset (1 / scm_to_double (x_scale),
+ 1 / scm_to_double (y_scale)));
+
+ (*func) (func_arg, scm_list_3 (ly_symbol2scm ("setscale"), x_scale,
+ y_scale));
+ interpret_stencil_expression (scm_caddr (expr), func, func_arg,
+ unscaled);
+ (*func) (func_arg, scm_list_1 (ly_symbol2scm ("resetscale")));
+
+ return;
+ }