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ir_constant_expression: Add support for the "normalize" builtin.

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This commit is contained in:
Kenneth Graunke
2010-07-21 20:19:32 -07:00
parent 8fe5f30645
commit 53f306d573
1 changed files with 8 additions and 1 deletions
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9
src/glsl/ir_constant_expression.cpp
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@@ -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) {