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txaFileFilter.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 txaFileFilter.h
10 * @author drose
11 * @date 2006-07-27
12 */
13
14#ifndef TXAFILEFILTER_H
15#define TXAFILEFILTER_H
16
17#include "pandatoolbase.h"
18#include "texturePoolFilter.h"
19#include "pt_EggTexture.h"
20
21class TxaFile;
22
23/**
24 * This is an abstract base class, a placeholder for any number of different
25 * classes that may wish to implement an effect on every texture loaded from
26 * disk via the TexturePool.
27 *
28 * In practice, as of the time of this writing, only the TxaFileFilter (in
29 * pandatool) actually implements this. But other kinds of filters are
30 * possible.
31 *
32 * This filter, once registered, will get a callback and a chance to modify
33 * each texture as it is loaded from disk the first time. If more than one
34 * filter is registered, each will be called in sequence, in the order in
35 * which they were registered.
36 *
37 * The filter does not get called again if the texture is subsequently
38 * reloaded from disk. It is suggested that filters for which this might be a
39 * problem should call tex->set_keep_ram_image(true).
40 */
41class EXPCL_MISC TxaFileFilter : public TexturePoolFilter {
42public:
43 virtual PT(Texture) post_load(Texture *tex);
44
45private:
46 static void read_txa_file();
47
48private:
49 static TxaFile *_txa_file;
50 static bool _got_txa_file;
51
52public:
53 static TypeHandle get_class_type() {
54 return _type_handle;
55 }
56 static void init_type() {
57 TexturePoolFilter::init_type();
58 register_type(_type_handle, "TxaFileFilter",
59 TexturePoolFilter::get_class_type());
60 }
61 virtual TypeHandle get_type() const {
62 return get_class_type();
63 }
64 virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
65
66private:
67 static TypeHandle _type_handle;
68};
69
70#include "txaFileFilter.I"
71
72#endif
This is an abstract base class, a placeholder for any number of different classes that may wish to im...
Represents a texture object, which is typically a single 2-d image but may also represent a 1-d or 3-...
Definition texture.h:72
This is an abstract base class, a placeholder for any number of different classes that may wish to im...
This represents the .txa file (usually textures.txa) that contains the user instructions for resizing...
Definition txaFile.h:30
TypeHandle is the identifier used to differentiate C++ class types.
Definition typeHandle.h:81
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.