bumpGLSL.h

Engine/source/shaderGen/GLSL/bumpGLSL.h

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Detailed Description

  1
  2//-----------------------------------------------------------------------------
  3// Copyright (c) 2012 GarageGames, LLC
  4//
  5// Permission is hereby granted, free of charge, to any person obtaining a copy
  6// of this software and associated documentation files (the "Software"), to
  7// deal in the Software without restriction, including without limitation the
  8// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  9// sell copies of the Software, and to permit persons to whom the Software is
 10// furnished to do so, subject to the following conditions:
 11//
 12// The above copyright notice and this permission notice shall be included in
 13// all copies or substantial portions of the Software.
 14//
 15// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 16// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 17// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 18// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 19// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 20// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 21// IN THE SOFTWARE.
 22//-----------------------------------------------------------------------------
 23
 24#ifndef _BUMP_GLSL_H_
 25#define _BUMP_GLSL_H_
 26
 27#ifndef _SHADERGEN_GLSL_SHADERFEATUREGLSL_H_
 28#include "shaderGen/GLSL/shaderFeatureGLSL.h"
 29#endif
 30#ifndef _LANG_ELEMENT_H_
 31#include "shaderGen/langElement.h"
 32#endif
 33
 34struct RenderPassData;
 35class MultiLine;
 36
 37
 38/// The Bumpmap feature will read the normal map and
 39/// transform it by the inverse of the worldToTanget 
 40/// matrix.  This normal is then used by subsequent
 41/// shader features.
 42class BumpFeatGLSL : public ShaderFeatureGLSL
 43{
 44public:
 45
 46   // ShaderFeatureGLSL
 47   virtual void processVert( Vector<ShaderComponent*> &componentList,
 48                             const MaterialFeatureData &fd );
 49   virtual void processPix( Vector<ShaderComponent*> &componentList, 
 50                            const MaterialFeatureData &fd );
 51   virtual Material::BlendOp getBlendOp(){ return Material::LerpAlpha; }  
 52   virtual Resources getResources( const MaterialFeatureData &fd );
 53   virtual void setTexData( Material::StageData &stageDat,
 54                            const MaterialFeatureData &fd,
 55                            RenderPassData &passData,
 56                            U32 &texIndex );
 57   virtual String getName() { return "Bumpmap"; }
 58};
 59
 60
 61/// This feature either generates the cheap yet effective offset
 62/// mapping style parallax or the much more expensive occlusion 
 63/// mapping technique based on the enabled feature flags.
 64class ParallaxFeatGLSL : public ShaderFeatureGLSL
 65{
 66protected:
 67
 68   static Var* _getUniformVar(   const char *name, 
 69                                 const char *type, 
 70                                 ConstantSortPosition csp );
 71
 72   ShaderIncludeDependency mIncludeDep;
 73
 74public:
 75
 76   ParallaxFeatGLSL();
 77
 78   // ShaderFeatureGLSL
 79   virtual void processVert(  Vector<ShaderComponent*> &componentList,
 80                              const MaterialFeatureData &fd );
 81   virtual void processPix(   Vector<ShaderComponent*> &componentList, 
 82                              const MaterialFeatureData &fd );
 83   virtual Resources getResources( const MaterialFeatureData &fd );
 84   virtual void setTexData(   Material::StageData &stageDat,
 85                              const MaterialFeatureData &fd,
 86                              RenderPassData &passData,
 87                              U32 &texIndex );
 88   virtual String getName() { return "Parallax"; }
 89};
 90
 91
 92/// This feature is used to render normals to the 
 93/// diffuse target for imposter rendering.
 94class NormalsOutFeatGLSL : public ShaderFeatureGLSL
 95{
 96public:
 97   
 98   // ShaderFeatureGLSL
 99   virtual void processVert(  Vector<ShaderComponent*> &componentList,
100                            const MaterialFeatureData &fd );
101   virtual void processPix( Vector<ShaderComponent*> &componentList, 
102                           const MaterialFeatureData &fd );
103   virtual Material::BlendOp getBlendOp(){ return Material::LerpAlpha; }  
104   virtual String getName() { return "NormalsOut"; }
105};
106
107#endif // _BUMP_GLSL_H_
108