Panda3D

lightRampAttrib.h

00001 // Filename: lightRampAttrib.h
00002 // Created by:  drose (04Mar02)
00003 //
00004 ////////////////////////////////////////////////////////////////////
00005 //
00006 // PANDA 3D SOFTWARE
00007 // Copyright (c) Carnegie Mellon University.  All rights reserved.
00008 //
00009 // All use of this software is subject to the terms of the revised BSD
00010 // license.  You should have received a copy of this license along
00011 // with this source code in a file named "LICENSE."
00012 //
00013 ////////////////////////////////////////////////////////////////////
00014 
00015 #ifndef LIGHTRAMPATTRIB_H
00016 #define LIGHTRAMPATTRIB_H
00017 
00018 #include "pandabase.h"
00019 #include "renderAttrib.h"
00020 
00021 class FactoryParams;
00022 
00023 ////////////////////////////////////////////////////////////////////
00024 //       Class : LightRampAttrib
00025 // Description : A Light Ramp is any unary operator that takes a 
00026 //               rendered pixel as input, and adjusts the brightness
00027 //               of that pixel.  For example, gamma correction is a
00028 //               kind of light ramp.  So is HDR tone mapping.  So is
00029 //               cartoon shading.  See the constructors for an
00030 //               explanation of each kind of ramp.
00031 ////////////////////////////////////////////////////////////////////
00032 class EXPCL_PANDA_PGRAPH LightRampAttrib : public RenderAttrib {
00033 private:
00034   INLINE LightRampAttrib();
00035 
00036 PUBLISHED:
00037   enum LightRampMode {
00038     LRT_default,
00039     LRT_identity,
00040     LRT_single_threshold,
00041     LRT_double_threshold,
00042     LRT_hdr0,
00043     LRT_hdr1,
00044     LRT_hdr2,
00045   };
00046   static CPT(RenderAttrib) make_default();
00047   static CPT(RenderAttrib) make_identity();
00048   static CPT(RenderAttrib) make_single_threshold(float thresh0, float lev0);
00049   static CPT(RenderAttrib) make_double_threshold(float thresh0, float lev0, float thresh1, float lev1);
00050   static CPT(RenderAttrib) make_hdr0();
00051   static CPT(RenderAttrib) make_hdr1();
00052   static CPT(RenderAttrib) make_hdr2();
00053   
00054 
00055   INLINE LightRampMode get_mode() const;
00056   INLINE float get_level(int n) const;
00057   INLINE float get_threshold(int n) const;
00058   
00059 public:
00060   virtual void output(ostream &out) const;
00061   
00062 protected:
00063   virtual int compare_to_impl(const RenderAttrib *other) const;
00064   
00065 private:
00066   LightRampMode _mode;
00067   float _level[2];
00068   float _threshold[2];
00069 
00070   static CPT(RenderAttrib) _default;
00071 
00072 PUBLISHED:
00073   static int get_class_slot() {
00074     return _attrib_slot;
00075   }
00076   virtual int get_slot() const {
00077     return get_class_slot();
00078   }
00079 
00080 public:
00081   static void register_with_read_factory();
00082   virtual void write_datagram(BamWriter *manager, Datagram &dg);
00083 
00084 protected:
00085   static TypedWritable *make_from_bam(const FactoryParams &params);
00086   void fillin(DatagramIterator &scan, BamReader *manager);
00087   
00088 public:
00089   static TypeHandle get_class_type() {
00090     return _type_handle;
00091   }
00092   static void init_type() {
00093     RenderAttrib::init_type();
00094     register_type(_type_handle, "LightRampAttrib",
00095                   RenderAttrib::get_class_type());
00096     _attrib_slot = register_slot(_type_handle, 100, make_default);
00097   }
00098   virtual TypeHandle get_type() const {
00099     return get_class_type();
00100   }
00101   virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
00102 
00103 private:
00104   static TypeHandle _type_handle;
00105   static int _attrib_slot;
00106 };
00107 
00108 #include "lightRampAttrib.I"
00109 
00110 #endif
00111 
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