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(PN_stdfloat thresh0, PN_stdfloat lev0);
00049   static CPT(RenderAttrib) make_double_threshold(PN_stdfloat thresh0, PN_stdfloat lev0, PN_stdfloat thresh1, PN_stdfloat 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 PN_stdfloat get_level(int n) const;
00057   INLINE PN_stdfloat 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   virtual size_t get_hash_impl() const;
00065   virtual CPT(RenderAttrib) get_auto_shader_attrib_impl(const RenderState *state) const;
00066   
00067 private:
00068   LightRampMode _mode;
00069   PN_stdfloat _level[2];
00070   PN_stdfloat _threshold[2];
00071 
00072   static CPT(RenderAttrib) _default;
00073 
00074 PUBLISHED:
00075   static int get_class_slot() {
00076     return _attrib_slot;
00077   }
00078   virtual int get_slot() const {
00079     return get_class_slot();
00080   }
00081 
00082 public:
00083   static void register_with_read_factory();
00084   virtual void write_datagram(BamWriter *manager, Datagram &dg);
00085 
00086 protected:
00087   static TypedWritable *make_from_bam(const FactoryParams &params);
00088   void fillin(DatagramIterator &scan, BamReader *manager);
00089   
00090 public:
00091   static TypeHandle get_class_type() {
00092     return _type_handle;
00093   }
00094   static void init_type() {
00095     RenderAttrib::init_type();
00096     register_type(_type_handle, "LightRampAttrib",
00097                   RenderAttrib::get_class_type());
00098     _attrib_slot = register_slot(_type_handle, 100, make_default);
00099   }
00100   virtual TypeHandle get_type() const {
00101     return get_class_type();
00102   }
00103   virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
00104 
00105 private:
00106   static TypeHandle _type_handle;
00107   static int _attrib_slot;
00108 };
00109 
00110 #include "lightRampAttrib.I"
00111 
00112 #endif
00113 
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