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ir_constant_expression: Add support for the "mix" builtin.

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Both 1.10 and 1.30 variants.
This commit is contained in:
Kenneth Graunke
2010-07-23 12:36:50 -07:00
parent b09ae5dd3f
commit 5d255e24b2
1 changed files with 13 additions and 1 deletions
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14
src/glsl/ir_constant_expression.cpp
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@@ -999,7 +999,19 @@ ir_call::constant_expression_value()
} else if (strcmp(callee, "min") == 0) {
expr = new(mem_ctx) ir_expression(ir_binop_min, type, op[0], op[1]);
} else if (strcmp(callee, "mix") == 0) {
return NULL; /* FINISHME: implement this */
assert(op[0]->type->is_float() && op[1]->type->is_float());
if (op[2]->type->is_float()) {
unsigned c2_inc = op[2]->type->is_scalar() ? 0 : 1;
unsigned components = op[0]->type->components();
for (unsigned c = 0, c2 = 0; c < components; c2 += c2_inc, c++) {
data.f[c] = op[0]->value.f[c] * (1 - op[2]->value.f[c2]) +
op[1]->value.f[c] * op[2]->value.f[c2];
}
} else {
assert(op[2]->type->is_boolean());
for (unsigned c = 0; c < op[0]->type->components(); c++)
data.f[c] = op[op[2]->value.b[c] ? 1 : 0]->value.f[c];
}
} 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) {