ir_constant_expression: Add support for the "tan" builtin.

diff --git a/src/glsl/ir_constant_expression.cpp b/src/glsl/ir_constant_expression.cpp
index b7ceefc393df45d73996289a426ec82c47d08182..bcf87e000f7d8bf465b53ea7138fa03780090880 100644 (file)
--- a/src/glsl/ir_constant_expression.cpp
+++ b/src/glsl/ir_constant_expression.cpp
@@ -926,7 +926,9 @@ ir_call::constant_expression_value()
    } else if (strcmp(callee, "step") == 0) {
       return NULL; /* FINISHME: implement this */
    } else if (strcmp(callee, "tan") == 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] = tanf(op[0]->value.f[c]);
    } else if (strcmp(callee, "tanh") == 0) {
       return NULL; /* FINISHME: implement this */
    } else if (strcmp(callee, "transpose") == 0) {