| // |
| // Copyright (c) 2010 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. |
| // |
| |
| #include "GLSLANG/ShaderLang.h" |
| #include "compiler/intermediate.h" |
| |
| class TInfoSinkBase; |
| |
| struct TLoopInfo { |
| struct TIndex { |
| int id; // symbol id. |
| } index; |
| TIntermLoop* loop; |
| }; |
| typedef TVector<TLoopInfo> TLoopStack; |
| |
| // Traverses intermediate tree to ensure that the shader does not exceed the |
| // minimum functionality mandated in GLSL 1.0 spec, Appendix A. |
| class ValidateLimitations : public TIntermTraverser { |
| public: |
| ValidateLimitations(ShShaderType shaderType, TInfoSinkBase& sink); |
| |
| int numErrors() const { return mNumErrors; } |
| |
| virtual bool visitBinary(Visit, TIntermBinary*); |
| virtual bool visitUnary(Visit, TIntermUnary*); |
| virtual bool visitAggregate(Visit, TIntermAggregate*); |
| virtual bool visitLoop(Visit, TIntermLoop*); |
| |
| private: |
| void error(TSourceLoc loc, const char *reason, const char* token); |
| |
| bool withinLoopBody() const; |
| bool isLoopIndex(const TIntermSymbol* symbol) const; |
| bool validateLoopType(TIntermLoop* node); |
| bool validateForLoopHeader(TIntermLoop* node, TLoopInfo* info); |
| bool validateForLoopInit(TIntermLoop* node, TLoopInfo* info); |
| bool validateForLoopCond(TIntermLoop* node, TLoopInfo* info); |
| bool validateForLoopExpr(TIntermLoop* node, TLoopInfo* info); |
| // Returns true if none of the loop indices is used as the argument to |
| // the given function out or inout parameter. |
| bool validateFunctionCall(TIntermAggregate* node); |
| bool validateOperation(TIntermOperator* node, TIntermNode* operand); |
| |
| // Returns true if indexing does not exceed the minimum functionality |
| // mandated in GLSL 1.0 spec, Appendix A, Section 5. |
| bool isConstExpr(TIntermNode* node); |
| bool isConstIndexExpr(TIntermNode* node); |
| bool validateIndexing(TIntermBinary* node); |
| |
| ShShaderType mShaderType; |
| TInfoSinkBase& mSink; |
| int mNumErrors; |
| TLoopStack mLoopStack; |
| }; |
| |