From 38cb1b273f55f98349d981445cfe06351322b032 Mon Sep 17 00:00:00 2001 From: Kenneth Graunke Date: Wed, 21 Jul 2010 16:57:10 -0700 Subject: [PATCH] ir_constant_expression: Add support for builtins dFdx, dFdy, and fwidth. These always return zero (the derivative of a constant). --- src/glsl/ir_constant_expression.cpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/glsl/ir_constant_expression.cpp b/src/glsl/ir_constant_expression.cpp index aa53d8d..641589e 100644 --- a/src/glsl/ir_constant_expression.cpp +++ b/src/glsl/ir_constant_expression.cpp @@ -812,7 +812,7 @@ ir_call::constant_expression_value() } else if (strcmp(callee, "atan") == 0) { return NULL; /* FINISHME: implement this */ } else if (strcmp(callee, "dFdx") == 0 || strcmp(callee, "dFdy") == 0) { - return NULL; /* FINISHME: implement this */ + return ir_constant::zero(mem_ctx, this->type); } else if (strcmp(callee, "ceil") == 0) { return NULL; /* FINISHME: implement this */ } else if (strcmp(callee, "clamp") == 0) { @@ -842,7 +842,7 @@ ir_call::constant_expression_value() } else if (strcmp(callee, "fract") == 0) { return NULL; /* FINISHME: implement this */ } else if (strcmp(callee, "fwidth") == 0) { - return NULL; /* FINISHME: implement this */ + return ir_constant::zero(mem_ctx, this->type); } else if (strcmp(callee, "greaterThan") == 0) { return NULL; /* FINISHME: implement this */ } else if (strcmp(callee, "greaterThanEqual") == 0) { -- 2.7.4