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geomMunger.h
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file geomMunger.h
10 * @author drose
11 * @date 2005-03-10
12 */
13
14#ifndef GEOMMUNGER_H
15#define GEOMMUNGER_H
16
17#include "pandabase.h"
18#include "typedReferenceCount.h"
19#include "geomVertexAnimationSpec.h"
20#include "geomVertexFormat.h"
21#include "geomVertexData.h"
22#include "geomCacheEntry.h"
23#include "indirectCompareTo.h"
24#include "pStatCollector.h"
25#include "lightMutex.h"
26#include "lightReMutex.h"
27#include "pointerTo.h"
28#include "pmap.h"
29#include "pset.h"
30
31 class GraphicsStateGuardianBase;
32 class RenderState;
33 class Geom;
34
35/**
36 * Objects of this class are used to convert vertex data from a Geom into a
37 * format suitable for passing to the rendering backend. Typically, the
38 * rendering backend will create a specialization of this class to handle its
39 * particular needs (e.g. DXGeomMunger). This class is necessary because
40 * DirectX and OpenGL have somewhat different requirements for vertex format.
41 *
42 * This also performs runtime application of state changes to the vertex data;
43 * for instance, by scaling all of the color values in response to a
44 * ColorScaleAttrib.
45 *
46 * A GeomMunger must be registered before it can be used, and once registered,
47 * the object is constant and cannot be changed. All registered GeomMungers
48 * that perform the same operation will have the same pointer.
49 */
50 class EXPCL_PANDA_GOBJ GeomMunger : public TypedReferenceCount, public GeomEnums {
51 public:
52 GeomMunger(GraphicsStateGuardianBase *gsg);
53 GeomMunger(const GeomMunger &copy);
54 void operator = (const GeomMunger &copy);
55 virtual ~GeomMunger();
56
57 INLINE GraphicsStateGuardianBase *get_gsg() const;
58
59 INLINE bool is_registered() const;
60 INLINE static PT(GeomMunger) register_munger(GeomMunger *munger, Thread *current_thread);
61 INLINE static void unregister_mungers_for_gsg(GraphicsStateGuardianBase *gsg);
62
63 INLINE CPT(GeomVertexFormat) munge_format(const GeomVertexFormat *format,
64 const GeomVertexAnimationSpec &animation) const;
65
66 INLINE CPT(GeomVertexData) munge_data(const GeomVertexData *data) const;
67 void remove_data(const GeomVertexData *data);
68
69 bool munge_geom(CPT(Geom) &geom, CPT(GeomVertexData) &data,
70 bool force, Thread *current_thread);
71
72 INLINE CPT(GeomVertexFormat) premunge_format(const GeomVertexFormat *format) const;
73 INLINE CPT(GeomVertexData) premunge_data(const GeomVertexData *data) const;
74 INLINE void premunge_geom(CPT(Geom) &geom, CPT(GeomVertexData) &data) const;
75
76 public:
77 INLINE int compare_to(const GeomMunger &other) const;
78 INLINE int geom_compare_to(const GeomMunger &other) const;
79
80 protected:
81 INLINE void unregister_myself();
82
83 CPT(GeomVertexFormat) do_munge_format(const GeomVertexFormat *format,
84 const GeomVertexAnimationSpec &animation);
85
86 virtual CPT(GeomVertexFormat) munge_format_impl(const GeomVertexFormat *orig,
87 const GeomVertexAnimationSpec &animation);
88 virtual CPT(GeomVertexData) munge_data_impl(const GeomVertexData *data);
89 virtual void munge_geom_impl(CPT(Geom) &geom, CPT(GeomVertexData) &data,
90 Thread *current_thread);
91
92
93 CPT(GeomVertexFormat) do_premunge_format(const GeomVertexFormat *format);
94 virtual CPT(GeomVertexFormat) premunge_format_impl(const GeomVertexFormat *orig);
95 virtual CPT(GeomVertexData) premunge_data_impl(const GeomVertexData *data);
96 virtual void premunge_geom_impl(CPT(Geom) &geom, CPT(GeomVertexData) &data);
97
98 virtual int compare_to_impl(const GeomMunger *other) const;
99 virtual int geom_compare_to_impl(const GeomMunger *other) const;
100
101 private:
102 class Registry;
103 INLINE static Registry *get_registry();
104 static void make_registry();
105
106 void do_register(Thread *current_thread);
107 void do_unregister();
108
109 private:
110 class CacheEntry : public GeomCacheEntry {
111 public:
112 virtual void output(std::ostream &out) const;
113
114 PT(GeomMunger) _munger;
115 };
116
117 typedef pmap<CPT(GeomVertexFormat), CPT(GeomVertexFormat) > Formats;
118 typedef pmap<GeomVertexAnimationSpec, Formats> FormatsByAnimation;
119 FormatsByAnimation _formats_by_animation;
120 Formats _premunge_formats;
121
122 // This mutex protects the above.
123 LightMutex _formats_lock;
124
125 GraphicsStateGuardianBase *_gsg;
126
127 bool _is_registered;
128 typedef pset<GeomMunger *, IndirectCompareTo<GeomMunger> > Mungers;
129 class EXPCL_PANDA_GOBJ Registry {
130 public:
131 Registry();
132 PT(GeomMunger) register_munger(GeomMunger *munger, Thread *current_thread);
133 void unregister_munger(GeomMunger *munger);
134 void unregister_mungers_for_gsg(GraphicsStateGuardianBase *gsg);
135
136 Mungers _mungers;
137 LightReMutex _registry_lock;
138 };
139
140 // We store the iterator into the above registry, while we are registered.
141 // This makes it easier to remove our own entry, especially when the
142 // destructor is called. Since it's a virtual destructor, we can't reliably
143 // look up our pointer in the map once we have reached the base class
144 // destructor (since the object has changed types by then, and the sorting
145 // in the map depends partly on type).
146 Mungers::iterator _registered_key;
147
148 static Registry *_registry;
149
150 static PStatCollector _munge_pcollector;
151
152 friend class GeomCacheManager;
153
154 public:
155 static TypeHandle get_class_type() {
156 return _type_handle;
157 }
158 static void init_type() {
159 TypedReferenceCount::init_type();
160 register_type(_type_handle, "GeomMunger",
161 TypedReferenceCount::get_class_type());
162 }
163 virtual TypeHandle get_type() const {
164 return get_class_type();
165 }
166 virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
167
168 private:
169 static TypeHandle _type_handle;
170
171 friend class Geom;
172};
173
174#include "geomMunger.I"
175
176#endif
GeomCacheEntry
This object contains a single cache entry in the GeomCacheManager.
Definition geomCacheEntry.h:31
GeomEnums
This class exists just to provide scoping for the various enumerated types used by Geom,...
Definition geomEnums.h:24
GeomMunger::remove_data
void remove_data(const GeomVertexData *data)
Removes a prepared GeomVertexData from the cache.
Definition geomMunger.cxx:76
GeomMunger::get_gsg
GraphicsStateGuardianBase * get_gsg() const
Returns a pointer to the GSG that created this munger.
Definition geomMunger.I:18
GeomMunger::munge_geom
bool munge_geom(ConstPointerTo< Geom > &geom, ConstPointerTo< GeomVertexData > &data, bool force, Thread *current_thread)
Applies the indicated munger to the geom and its data, and returns a (possibly different) geom and da...
Definition geomMunger.cxx:95
GeomMunger::unregister_mungers_for_gsg
static void unregister_mungers_for_gsg(GraphicsStateGuardianBase *gsg)
Removes all the mungers from the registry that are associated with the indicated GSG.
Definition geomMunger.I:52
GeomMunger::is_registered
bool is_registered() const
Returns true if this munger has been registered, false if it has not.
Definition geomMunger.I:28
GeomVertexAnimationSpec
This object describes how the vertex animation, if any, represented in a GeomVertexData is encoded.
Definition geomVertexAnimationSpec.h:38
GeomVertexData
This defines the actual numeric vertex data stored in a Geom, in the structure defined by a particula...
Definition geomVertexData.h:68
GeomVertexFormat
This class defines the physical layout of the vertex data stored within a Geom.
Definition geomVertexFormat.h:55
Geom
A container for geometry primitives.
Definition geom.h:54
GraphicsStateGuardianBase
This is a base class for the GraphicsStateGuardian class, which is itself a base class for the variou...
Definition graphicsStateGuardianBase.h:110
LightMutex
This is a standard, non-reentrant mutex, similar to the Mutex class.
Definition lightMutex.h:41
LightReMutex
A lightweight reentrant mutex.
Definition lightReMutex.h:32
PStatCollector
A lightweight class that represents a single element that may be timed and/or counted via stats.
Definition pStatCollector.h:43
RenderState
This represents a unique collection of RenderAttrib objects that correspond to a particular renderabl...
Definition renderState.h:47
Thread
A thread; that is, a lightweight process.
Definition thread.h:46
TypeHandle
TypeHandle is the identifier used to differentiate C++ class types.
Definition typeHandle.h:81
geomCacheEntry.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
geomMunger.I
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
geomVertexAnimationSpec.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
geomVertexData.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
geomVertexFormat.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
indirectCompareTo.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
lightMutex.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
lightReMutex.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
pStatCollector.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
pandabase.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
pmap.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
pointerTo.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
pset.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
register_type
void register_type(TypeHandle &type_handle, const std::string &name)
This inline function is just a convenient way to call TypeRegistry::register_type(),...
Definition register_type.I:22
typedReferenceCount.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.