2 // Copyright (c) 2010 The ANGLE Project Authors. All rights reserved.
3 // Use of this source code is governed by a BSD-style license that can be
4 // found in the LICENSE file.
7 #include "GLSLANG/ShaderLang.h"
8 #include "compiler/intermediate.h"
18 typedef TVector<TLoopInfo> TLoopStack;
20 // Traverses intermediate tree to ensure that the shader does not exceed the
21 // minimum functionality mandated in GLSL 1.0 spec, Appendix A.
22 class ValidateLimitations : public TIntermTraverser {
24 ValidateLimitations(ShShaderType shaderType, TInfoSinkBase& sink);
26 int numErrors() const { return mNumErrors; }
28 virtual bool visitBinary(Visit, TIntermBinary*);
29 virtual bool visitUnary(Visit, TIntermUnary*);
30 virtual bool visitAggregate(Visit, TIntermAggregate*);
31 virtual bool visitLoop(Visit, TIntermLoop*);
34 void error(TSourceLoc loc, const char *reason, const char* token);
36 bool withinLoopBody() const;
37 bool isLoopIndex(const TIntermSymbol* symbol) const;
38 bool validateLoopType(TIntermLoop* node);
39 bool validateForLoopHeader(TIntermLoop* node, TLoopInfo* info);
40 bool validateForLoopInit(TIntermLoop* node, TLoopInfo* info);
41 bool validateForLoopCond(TIntermLoop* node, TLoopInfo* info);
42 bool validateForLoopExpr(TIntermLoop* node, TLoopInfo* info);
43 // Returns true if none of the loop indices is used as the argument to
44 // the given function out or inout parameter.
45 bool validateFunctionCall(TIntermAggregate* node);
46 bool validateOperation(TIntermOperator* node, TIntermNode* operand);
48 // Returns true if indexing does not exceed the minimum functionality
49 // mandated in GLSL 1.0 spec, Appendix A, Section 5.
50 bool isConstExpr(TIntermNode* node);
51 bool isConstIndexExpr(TIntermNode* node);
52 bool validateIndexing(TIntermBinary* node);
54 ShShaderType mShaderType;
57 TLoopStack mLoopStack;