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authorKenneth Graunke <[email protected]>2010-07-21 21:46:16 -0700
committerKenneth Graunke <[email protected]>2010-07-28 15:46:29 -0700
commit3d5c2f0adbd72a68d4fe3900b0d3e267510950ef (patch)
tree5a65d8056dda9dc76564b5d48857028eaedb93ef /src/glsl
parent04b3643dbf2e0d25e67c86845b2506ad1d26939d (diff)
ir_constant_expression: Add support for the "faceforward" builtin.
Diffstat (limited to 'src/glsl')
-rw-r--r--src/glsl/ir_constant_expression.cpp5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/glsl/ir_constant_expression.cpp b/src/glsl/ir_constant_expression.cpp
index 580ef1d4fae..c939690129a 100644
--- a/src/glsl/ir_constant_expression.cpp
+++ b/src/glsl/ir_constant_expression.cpp
@@ -881,7 +881,10 @@ ir_call::constant_expression_value()
} else if (strcmp(callee, "exp2") == 0) {
expr = new(mem_ctx) ir_expression(ir_unop_exp2, type, op[0], NULL);
} else if (strcmp(callee, "faceforward") == 0) {
- return NULL; /* FINISHME: implement this */
+ if (dot(op[2], op[1]) < 0)
+ return op[0];
+ for (unsigned c = 0; c < op[0]->type->components(); c++)
+ data.f[c] = -op[0]->value.f[c];
} else if (strcmp(callee, "floor") == 0) {
expr = new(mem_ctx) ir_expression(ir_unop_floor, type, op[0], NULL);
} else if (strcmp(callee, "fract") == 0) {