MeVisLab/Standard/Sources/Inventor/SoShader/Inventor/nodes/SoSampler.h

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// **InsertLicense** code



#ifndef  _SO_SAMPLER_
#define  _SO_SAMPLER_

#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>

class SoSensor;
class SoFieldSensor;

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;

   SoEXTENDER public:

      virtual void  updateParameter(SoUniformParameterBase *uniformBase, SoState *state);

   SoINTERNAL public:

      static void   initClass();

   protected:
     
      virtual ~SoSampler();

      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(SoSensor *sensor);
      static  void   nameChangedCB(void *data, SoSensor *sensor);

      virtual void   texConfigChanged(SoSensor *) {};
      static  void   texConfigChangedCB(void *data, SoSensor *sensor);
  
   private:

      SoFieldSensor *_nameSensor;
      SoFieldSensor *_minSensor;
      SoFieldSensor *_magSensor;
      SoFieldSensor *_use16BitFloatSensor;
};

#endif  // _SO_SAMPLER_