Add constant casting support.
BUG=380353
Change-Id: I5a350ca09e2b7e7abb9fa079365adb5aad5af607
Reviewed-on: https://chromium-review.googlesource.com/203450
Reviewed-by: Shannon Woods <shannonwoods@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Tested-by: Nicolas Capens <nicolascapens@chromium.org>
diff --git a/src/compiler/translator/ConstantUnion.h b/src/compiler/translator/ConstantUnion.h
index 5fdba61..5e86c64 100644
--- a/src/compiler/translator/ConstantUnion.h
+++ b/src/compiler/translator/ConstantUnion.h
@@ -1,5 +1,5 @@
//
-// Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
+// Copyright (c) 2002-2014 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
@@ -18,6 +18,67 @@
type = EbtVoid;
}
+ bool cast(TBasicType newType, const ConstantUnion &constant)
+ {
+ switch (newType)
+ {
+ case EbtFloat:
+ switch (constant.type)
+ {
+ case EbtInt: setFConst(static_cast<float>(constant.getIConst())); break;
+ case EbtUInt: setFConst(static_cast<float>(constant.getUConst())); break;
+ case EbtBool: setFConst(static_cast<float>(constant.getBConst())); break;
+ case EbtFloat: setFConst(static_cast<float>(constant.getFConst())); break;
+ default: return false;
+ }
+ break;
+ case EbtInt:
+ switch (constant.type)
+ {
+ case EbtInt: setIConst(static_cast<int>(constant.getIConst())); break;
+ case EbtUInt: setIConst(static_cast<int>(constant.getUConst())); break;
+ case EbtBool: setIConst(static_cast<int>(constant.getBConst())); break;
+ case EbtFloat: setIConst(static_cast<int>(constant.getFConst())); break;
+ default: return false;
+ }
+ break;
+ case EbtUInt:
+ switch (constant.type)
+ {
+ case EbtInt: setUConst(static_cast<unsigned int>(constant.getIConst())); break;
+ case EbtUInt: setUConst(static_cast<unsigned int>(constant.getUConst())); break;
+ case EbtBool: setUConst(static_cast<unsigned int>(constant.getBConst())); break;
+ case EbtFloat: setUConst(static_cast<unsigned int>(constant.getFConst())); break;
+ default: return false;
+ }
+ break;
+ case EbtBool:
+ switch (constant.type)
+ {
+ case EbtInt: setBConst(constant.getIConst() != 0); break;
+ case EbtUInt: setBConst(constant.getUConst() != 0); break;
+ case EbtBool: setBConst(constant.getBConst()); break;
+ case EbtFloat: setBConst(constant.getFConst() != 0.0f); break;
+ default: return false;
+ }
+ break;
+ case EbtStruct: // Struct fields don't get cast
+ switch (constant.type)
+ {
+ case EbtInt: setIConst(constant.getIConst()); break;
+ case EbtUInt: setUConst(constant.getUConst()); break;
+ case EbtBool: setBConst(constant.getBConst()); break;
+ case EbtFloat: setFConst(constant.getFConst()); break;
+ default: return false;
+ }
+ break;
+ default:
+ return false;
+ }
+
+ return true;
+ }
+
void setIConst(int i) {iConst = i; type = EbtInt; }
void setUConst(unsigned int u) { uConst = u; type = EbtUInt; }
void setFConst(float f) {fConst = f; type = EbtFloat; }