SoBlendMode.h

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/*************************************************************************************
**
** Copyright 2015, 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_BLEND_MODE_H
#define SO_BLEND_MODE_H
 
#include "SoShaderSystem.h"
#include <Inventor/nodes/SoSubNode.h>
#include <Inventor/fields/SoSFBool.h>
#include <Inventor/fields/SoSFEnum.h>
#include <Inventor/fields/SoSFFloat.h>
#include <Inventor/fields/SoSFColor.h>
#include <Inventor/system/SbOpenGL.h>

class INVENTOR_SHADER_API SoBlendMode : public SoNode
{
   typedef SoNode inherited;
 
   SO_NODE_HEADER(SoBlendMode);
 
   public:
      enum BlendMode {
        BLEND_OFF,
        BLEND_REPLACE,
        BLEND_ADD,
        BLEND_SCREEN,
        BLEND_MIN,
        BLEND_MAX,
        BLEND_BLEND,
        BLEND_PREMULTIPLIED_BLEND,
        BLEND_CUSTOM,
        BLEND_CUSTOM_SEPARATE
      };
 
      enum Equation {
        ADD = GL_FUNC_ADD,
        SUBTRACT = GL_FUNC_SUBTRACT,
        REVERSE_SUBTRACT = GL_FUNC_REVERSE_SUBTRACT
      };
 
      enum Function {
        ZERO                          = GL_ZERO,
        ONE                           = GL_ONE,
        SRC_COLOR                     = GL_SRC_COLOR,
        ONE_MINUS_SRC_COLOR           = GL_ONE_MINUS_SRC_COLOR,
        DST_COLOR                     = GL_DST_COLOR,
        ONE_MINUS_DST_COLOR           = GL_ONE_MINUS_DST_COLOR,
        SRC_ALPHA                     = GL_SRC_ALPHA,
        ONE_MINUS_SRC_ALPHA           = GL_ONE_MINUS_SRC_ALPHA,
        DST_ALPHA                     = GL_DST_ALPHA,
        ONE_MINUS_DST_ALPHA           = GL_ONE_MINUS_DST_ALPHA,
        CONSTANT_COLOR                = GL_CONSTANT_COLOR,
        ONE_MINUS_CONSTANT_COLOR      = GL_ONE_MINUS_CONSTANT_COLOR,
        CONSTANT_ALPHA                = GL_CONSTANT_ALPHA,
        ONE_MINUS_CONSTANT_ALPHA      = GL_ONE_MINUS_CONSTANT_ALPHA,
        SRC_ALPHA_SATURATE            = GL_SRC_ALPHA_SATURATE
      };
 
      SoSFBool   enabled;
      SoSFEnum   blendMode;
 
      SoSFEnum blendEquation;
      SoSFEnum blendFunctionSrc;
      SoSFEnum blendFunctionDst;
      SoSFEnum alphaBlendFunctionSrc;
      SoSFEnum alphaBlendFunctionDst;
 
      SoSFColor constantBlendColor;
      SoSFFloat constantBlendAlpha;

      SoBlendMode();
 
   SoEXTENDER public:

      void GLRender(SoGLRenderAction *action) override;
 
   SoINTERNAL public:

      static void initClass();
};
 
#endif