//-
// ==========================================================================
// Copyright (C) 2005 ATI Technologies Inc. All rights reserved.
//
// Copyright (C) 1995 - 2005 Alias Systems Corp. and/or its licensors.  All 
// rights reserved. 
// 
// The coded instructions, statements, computer programs, and/or related 
// material (collectively the "Data") in these files are provided by Alias 
// Systems Corp. ("Alias") and/or its licensors for the exclusive use of the 
// Customer (as defined in the Alias Software License Agreement that 
// accompanies this Alias software). Such Customer has the right to use, 
// modify, and incorporate the Data into other products and to distribute such 
// products for use by end-users.
//  
// THE DATA IS PROVIDED "AS IS".  ALIAS HEREBY DISCLAIMS ALL WARRANTIES 
// RELATING TO THE DATA, INCLUDING, WITHOUT LIMITATION, ANY AND ALL EXPRESS OR 
// IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND/OR FITNESS FOR A 
// PARTICULAR PURPOSE. IN NO EVENT SHALL ALIAS BE LIABLE FOR ANY DAMAGES 
// WHATSOEVER, WHETHER DIRECT, INDIRECT, SPECIAL, OR PUNITIVE, WHETHER IN AN 
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, OR IN EQUITY, 
// ARISING OUT OF ACCESS TO, USE OF, OR RELIANCE UPON THE DATA.
// ==========================================================================
//+
#ifndef DEFAULT_SHADER_H
#define DEFAULT_SHADER_H

#include "glExtensions.h"

#include "Shader.h"

class defaultShader : public shader {

  public:
    defaultShader();

    //no GL cleanup, because we may not have a context at shutdown
    virtual ~defaultShader() {};

    virtual bool valid() {return true;};
    virtual int passCount() {return 1;};
    virtual int techniqueCount() {return 1;};
    virtual const char* techniqueName( int n) { return NULL;};
    virtual bool build() { return true;};
    virtual void bind();
    virtual void unbind();
    virtual void setTechnique( int t) {};
    virtual void setPass( int p) {};
    virtual const char* getVertexShader( int pass) {return NULL;};
    virtual const char* getPixelShader( int pass) {return NULL;};

    virtual int uniformCount() {return 0;};
    virtual int samplerCount() {return 0;};
    virtual int attributeCount() {return 0;};
    virtual const char* uniformName(int i) {return NULL;};
    virtual DataType uniformType(int i) { return dtUnknown;};
    virtual Semantic uniformSemantic(int i) { return smNone;};
    virtual float* uniformDefault(int i) { return NULL;};
    virtual const char* samplerName(int i) {return NULL;};
    virtual SamplerType samplerType(int i) {return stUnknown;};
    virtual const char* attributeName(int i) {return NULL;};
    virtual DataType attributeType(int i) {return dtUnknown;};
    virtual int attributeHandle(int i) {return 0;};

    //need set functions for current values
    virtual void updateUniformBool( int i, bool val) {};
    virtual void updateUniformInt( int i, int val) {};
    virtual void updateUniformFloat( int i, float val) {};
    virtual void updateUniformBVec( int i, const bool* val) {};
    virtual void updateUniformIVec( int i, const int* val) {};
    virtual void updateUniformVec( int i, const float* val) {};
    virtual void updateUniformMat( int i, const float* val) {};
    virtual void updateUniformMat( int i, const double* val) {};
    virtual void updateSampler( int i, unsigned int val) {};

    //predefined attributes
    virtual bool usesColor() {return false;};
    virtual bool usesNormal() {return true;};
    virtual bool usesTexCoord( int set) {return set==0;};
    virtual bool usesTangent() {return false;};
    virtual bool usesBinormal() {return false;};
    virtual int tangentSlot() {return 0;};
    virtual int binormalSlot() {return 0;};

    //error reporting
    virtual const char* errorString() { return "";};

  private:

    static const char vShader[];
    static const char fShader[];

    GLuint m_program;
    GLuint m_fShader;
    GLuint m_vShader;
};

#endif //DEFAULT_SHADER_H