SoSampler.h

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/*************************************************************************************
**
** Copyright 2007, MeVis Medical Solutions AG
**
** The user may use this file in accordance with the license agreement provided with
** the Software or, alternatively, in accordance with the terms contained in a
** written agreement between the user and MeVis Medical Solutions AG.
**
** For further information use the contact form at https://www.mevislab.de/contact
**
**************************************************************************************/
 
#ifndef SO_SAMPLER_H
#define SO_SAMPLER_H
 
 
 
#include "SoShaderSystem.h"
#include "Inventor/nodes/SoUniformShaderParameter.h"
#include "Inventor/elements/SoSamplerInfoElement.h"
#include <Inventor/fields/SoSFUInt32.h>
#include <Inventor/fields/SoSFEnum.h>
#include <Inventor/fields/SoSFBool.h>
#include <Inventor/fields/SoSFVec4f.h>
#include <GL/glew.h>
 
SoEXTENDER class INVENTOR_SHADER_API SoSampler : public SoUniformShaderParameter
{
   typedef SoUniformShaderParameter inherited;
 
   SO_NODE_ABSTRACT_HEADER(SoSampler);
 
   public:
 
      enum TexGenMode {
         NORMAL_MAP      = GL_NORMAL_MAP_EXT,
         REFLECTION_MAP  = GL_REFLECTION_MAP_EXT
      };
 
      enum Wrap {
         REPEAT          = GL_REPEAT,          // Not supported by GL_TEXTURE_RECTANGLE_ARB
         CLAMP           = GL_CLAMP,
         CLAMP_TO_EDGE   = GL_CLAMP_TO_EDGE,   // OpenGL 1.2
         CLAMP_TO_BORDER = GL_CLAMP_TO_BORDER, // OpenGL 1.3
         MIRRORED_REPEAT = GL_MIRRORED_REPEAT  // OpenGL 1.4, not supported by GL_TEXTURE_RECTANGLE_ARB
      };
 
      enum Filter {
         NEAREST                = GL_NEAREST,
         LINEAR                 = GL_LINEAR,
         NEAREST_MIPMAP_NEAREST = GL_NEAREST_MIPMAP_NEAREST,   // GL_TEXTURE_MIN_FILTER only
         NEAREST_MIPMAP_LINEAR  = GL_NEAREST_MIPMAP_LINEAR,    // GL_TEXTURE_MIN_FILTER only
         LINEAR_MIPMAP_NEAREST  = GL_LINEAR_MIPMAP_NEAREST,    // GL_TEXTURE_MIN_FILTER only
         LINEAR_MIPMAP_LINEAR   = GL_LINEAR_MIPMAP_LINEAR      // GL_TEXTURE_MIN_FILTER only
      };
 
      SoSFEnum   wrapS;
 
      SoSFBool   enableBorder;
 
      SoSFVec4f  borderColor;
 
      SoSFEnum   minFilter;
 
      SoSFEnum   magFilter;
 
      SoSFBool   use16BitFloat;
 
      SoSFBool   needsTextureCoordinates;
 
   SoEXTENDER public:
 
      void  updateParameter(SoUniformParameterBase *uniformBase, SoState *state) override;
 
   SoINTERNAL public:
 
      static void   initClass();
 
   protected:
 
      ~SoSampler() override;
 
      SbBool         _hasTextureFloat;
 
      SbString       _sizeUniformName;
 
      unsigned int   _textureComponents;
      GLenum         _textureDataType;
 
      SoSampler();
 
      GLint          getInternalFormat(GLenum glDataType);
 
      const char *   getTextureFormatName(GLenum internalFormat);
 
      SbSamplerInfo::TextureType getTextureTypeFromGLFormat(GLenum internalFormat);
 
      void postTextureFormatInfo(GLenum target, GLint format);
 
      void postTextureSizeInfo(GLenum target);
 
      virtual void   nameChanged(SoField* field);
 
      virtual void   texConfigChanged(SoField* /*field*/) {};
};
 
#endif  // _SO_SAMPLER_