//-
// ==========================================================================
// 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.
// ==========================================================================
//+

#include "Shader.h"
#include "glslFXShader.h"
#include "hlslFXShader.h"

std::string shader::sError;

//
//
//////////////////////////////////////////////////////////////////////
shader* shader::create( const char *filename) {

  sError.clear();
  if (glShadingLanguageSupport && glAsmProgramSupport) {
    //create an AshliFX for this file and attempt to read it
    //after parsing, the type can be checked to determine which type of shader node to create
    IAshliFX *fx = new IAshliFX;
    fx->init();
    fx->setFX( filename);

    try {
      if (fx->parse()) {
        if (fx->getBinding() == IAshliFX::GLSL) {
          glslFXShader *s = new glslFXShader;
          s->createFromFX( fx);
	      // Commented out as this causes a access violation.
          //delete fx;
          return s;
        }
        if (fx->getBinding() == IAshliFX::DXSL) {
          hlslFXShader *s = new hlslFXShader;
          s->createFromFX( fx);
	      // Commented out as this causes a access violation.
          //delete fx;
          return s;
        }
      }
      else {
        sError = fx->getError();
      }
    } catch(...) {
      printf("Unexpected Error!!\n");
    }
    delete fx;
  }
  //how should we treat an error? there is no convenient way to report an error message

  

  return NULL;
}