Panda3D
Loading...
Searching...
No Matches
bufferContext.h
Go to the documentation of this file.
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 bufferContext.h
10 * @author drose
11 * @date 2006-03-16
12 */
13
14#ifndef BUFFERCONTEXT_H
15#define BUFFERCONTEXT_H
16
17#include "pandabase.h"
18
19#include "savedContext.h"
20#include "updateSeq.h"
21#include "linkedListNode.h"
22#include "bufferContextChain.h"
24
27
28/**
29 * This is a base class for those kinds of SavedContexts that occupy an
30 * easily-measured (and substantial) number of bytes in the video card's frame
31 * buffer memory or AGP memory. At the present, this includes most of the
32 * SavedContext types: VertexBufferContext and IndexBufferContext, as well as
33 * TextureContext.
34 *
35 * This class provides methods for tracking the video memory utilization, as
36 * well as residency of each object, via PStats.
37 */
38class EXPCL_PANDA_GOBJ BufferContext : public SavedContext, private LinkedListNode {
39public:
41 virtual ~BufferContext();
42
43 INLINE TypedWritableReferenceCount *get_object() const;
44
45PUBLISHED:
46 INLINE size_t get_data_size_bytes() const;
47 INLINE UpdateSeq get_modified() const;
48 INLINE bool get_active() const;
49 INLINE bool get_resident() const;
50
51 MAKE_PROPERTY(object, get_object);
52
53 MAKE_PROPERTY(data_size_bytes, get_data_size_bytes);
54 MAKE_PROPERTY(modified, get_modified);
55 MAKE_PROPERTY(active, get_active);
56 MAKE_PROPERTY(resident, get_resident);
57
58public:
59 INLINE void set_active(bool flag);
60 INLINE void set_resident(bool flag);
61
62 INLINE BufferContext *get_next() const;
63
64 INLINE void update_data_size_bytes(size_t new_data_size_bytes);
65 INLINE void update_modified(UpdateSeq new_modified);
66
67private:
68 void set_owning_chain(BufferContextChain *chain);
69
70protected:
71 // This cannot be a PT(), because the object and the GSG both own their
72 // BufferContexts! That would create a circular reference count.
74
75private:
76 BufferResidencyTracker *_residency;
77 int _residency_state;
78
79 size_t _data_size_bytes;
80 UpdateSeq _modified;
81 BufferContextChain *_owning_chain;
82
83public:
84 static TypeHandle get_class_type() {
85 return _type_handle;
86 }
87 static void init_type() {
88 SavedContext::init_type();
89 register_type(_type_handle, "BufferContext",
90 SavedContext::get_class_type());
91 }
92 virtual TypeHandle get_type() const {
93 return get_class_type();
94 }
95 virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
96
97private:
98 static TypeHandle _type_handle;
99
100 friend class PreparedGraphicsObjects;
101 friend class BufferResidencyTracker;
102 friend class BufferContextChain;
103};
104
105#include "bufferContext.I"
106
107#endif
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
This class maintains a linked list of BufferContexts that might be allocated on the graphics card in ...
This is a base class for those kinds of SavedContexts that occupy an easily-measured (and substantial...
This class is used to keep track of the current state of all the BufferContexts for a particular grap...
This just stores the pointers to implement a doubly-linked list of some kind of object.
A table of objects that are saved within the graphics context for reference by handle later.
This is the base class for all GSG-specific context objects, such as TextureContext and GeomContext.
TypeHandle is the identifier used to differentiate C++ class types.
Definition typeHandle.h:81
A base class for things which need to inherit from both TypedWritable and from ReferenceCount.
This is a sequence number that increments monotonically.
Definition updateSeq.h:37
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
void register_type(TypeHandle &type_handle, const std::string &name)
This inline function is just a convenient way to call TypeRegistry::register_type(),...
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.