From 53f306d573ce6393062cf86d4fe31148eacc5e1e Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Wed, 21 Jul 2010 20:19:32 -0700 Subject: ir_constant_expression: Add support for the "normalize" builtin. --- src/glsl/ir_constant_expression.cpp | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'src/glsl/ir_constant_expression.cpp') diff --git a/src/glsl/ir_constant_expression.cpp b/src/glsl/ir_constant_expression.cpp index 2c80c8b5e0..809ea609a3 100644 --- a/src/glsl/ir_constant_expression.cpp +++ b/src/glsl/ir_constant_expression.cpp @@ -977,7 +977,14 @@ ir_call::constant_expression_value() } else if (strcmp(callee, "mod") == 0) { expr = new(mem_ctx) ir_expression(ir_binop_mod, type, op[0], op[1]); } else if (strcmp(callee, "normalize") == 0) { - return NULL; /* FINISHME: implement this */ + assert(op[0]->type->is_float()); + float length = sqrtf(dot(op[0], op[0])); + + if (length == 0) + return ir_constant::zero(mem_ctx, this->type); + + for (unsigned c = 0; c < op[0]->type->components(); c++) + data.f[c] = op[0]->value.f[c] / length; } else if (strcmp(callee, "not") == 0) { expr = new(mem_ctx) ir_expression(ir_unop_logic_not, type, op[0], NULL); } else if (strcmp(callee, "notEqual") == 0) { -- cgit v1.2.3