DtGlShader.h

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/******************************************************************************
** Copyright (c) 2023 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/
#pragma once


#include <vrvGraphicsUtils/vrvGraphicsUtils.h>

#include <vrvMath/DtCommonTypes.h>
#include <vrvMath/DtDataFormat.h>

#include <vector>
#include <string>

namespace makVrv
{   
   class DtGlTexture;

   class DT_DLL_VRVGRAPHICSUTILS DtGlShader
   {
   public:
      enum DtGlShaderType
      {
         VERTEX_SHADER = 0,
         TESSEVAL_SHADER,
         TESSCONTROL_SHADER,
         GEOMETRY_SHADER,
         FRAGMENT_SHADER,
         COMPUTE_SHADER
      };
   public:
      DtGlShader(const std::string& name, const std::string& source, DtGlShaderType type);

      virtual ~DtGlShader();
   private: 
      DtGlShader();

      DtGlShader(const DtGlShader&);

      DtGlShader& operator=(const DtGlShader&);
   public:
      virtual bool isValid() const;

      virtual unsigned int id() const;
   public:
      static std::string loadShaderSource(const std::string& strFileName, bool logWarning = true);

      static void saveShaderSource(const std::string& strFileName, const std::string& strSource);

      static std::string fixVersionDirective(const std::string &shaderString);

      static void deleteShaders(const std::vector<unsigned int>& shaderVector);

      static bool compileShader(const std::string& shader_name, const std::string& source, DtGlShaderType shaderType, unsigned int &shaderID);

      static void printGLSLInfoLog(unsigned int shader);

   protected:
      unsigned int myShaderID;
      bool myIsValid;
   };
}