ir_constant_expression: Add support for the "degrees" builtin.

diff --git a/src/glsl/ir_constant_expression.cpp b/src/glsl/ir_constant_expression.cpp
index bc1261b0b95d6f2d1e8e51d33334540ab80cb794..e68a7b1a2a206743f1ed15fcccf66da267d7901c 100644 (file)
--- a/src/glsl/ir_constant_expression.cpp
+++ b/src/glsl/ir_constant_expression.cpp
@@ -850,7 +850,9 @@ ir_call::constant_expression_value()
    } else if (strcmp(callee, "cross") == 0) {
       expr = new(mem_ctx) ir_expression(ir_binop_cross, type, op[0], op[1]);
    } else if (strcmp(callee, "degrees") == 0) {
-      return NULL; /* FINISHME: implement this */
+      assert(op[0]->type->is_float());
+      for (unsigned c = 0; c < op[0]->type->components(); c++)
+        data.f[c] = 180.0/M_PI * op[0]->value.f[c];
    } else if (strcmp(callee, "distance") == 0) {
       return NULL; /* FINISHME: implement this */
    } else if (strcmp(callee, "dot") == 0) {