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//
// Copyright (c) 2002-2010 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.
//
#ifndef _SHHANDLE_INCLUDED_
#define _SHHANDLE_INCLUDED_
//
// Machine independent part of the compiler private objects
// sent as ShHandle to the driver.
//
// This should not be included by driver code.
//
#include "GLSLANG/ShaderLang.h"
#include "compiler/ExtensionBehavior.h"
#include "compiler/InfoSink.h"
#include "compiler/SymbolTable.h"
#include "compiler/VariableInfo.h"
class TCompiler;
//
// The base class used to back handles returned to the driver.
//
class TShHandleBase {
public:
TShHandleBase();
virtual ~TShHandleBase();
virtual TCompiler* getAsCompiler() { return 0; }
protected:
// Memory allocator. Allocates and tracks memory required by the compiler.
// Deallocates all memory when compiler is destructed.
TPoolAllocator allocator;
};
//
// The base class for the machine dependent compiler to derive from
// for managing object code from the compile.
//
class TCompiler : public TShHandleBase {
public:
TCompiler(ShShaderType type, ShShaderSpec spec);
virtual ~TCompiler();
virtual TCompiler* getAsCompiler() { return this; }
bool Init(const ShBuiltInResources& resources);
bool compile(const char* const shaderStrings[],
const int numStrings,
int compileOptions);
// Get results of the last compilation.
TInfoSink& getInfoSink() { return infoSink; }
const TVariableInfoList& getAttribs() const { return attribs; }
const TVariableInfoList& getUniforms() const { return uniforms; }
protected:
ShShaderType getShaderType() const { return shaderType; }
ShShaderSpec getShaderSpec() const { return shaderSpec; }
// Initialize symbol-table with built-in symbols.
bool InitBuiltInSymbolTable(const ShBuiltInResources& resources);
// Clears the results from the previous compilation.
void clearResults();
// Returns true if the given shader does not exceed the minimum
// functionality mandated in GLSL 1.0 spec Appendix A.
bool validateLimitations(TIntermNode* root);
// Collect info for all attribs and uniforms.
void collectAttribsUniforms(TIntermNode* root);
// Translate to object code.
virtual void translate(TIntermNode* root) = 0;
private:
ShShaderType shaderType;
ShShaderSpec shaderSpec;
// Built-in symbol table for the given language, spec, and resources.
// It is preserved from compile-to-compile.
TSymbolTable symbolTable;
// Built-in extensions with default behavior.
TExtensionBehavior extensionBehavior;
// Results of compilation.
TInfoSink infoSink; // Output sink.
TVariableInfoList attribs; // Active attributes in the compiled shader.
TVariableInfoList uniforms; // Active uniforms in the compiled shader.
};
//
// This is the interface between the machine independent code
// and the machine dependent code.
//
// The machine dependent code should derive from the classes
// above. Then Construct*() and Delete*() will create and
// destroy the machine dependent objects, which contain the
// above machine independent information.
//
TCompiler* ConstructCompiler(ShShaderType type, ShShaderSpec spec);
void DeleteCompiler(TCompiler*);
#endif // _SHHANDLE_INCLUDED_
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