Panda3D
pnmFileTypeAndroid.h
1 // Filename: pnmFileTypeAndroid.h
2 // Created by: rdb (11Jan13)
3 //
4 ////////////////////////////////////////////////////////////////////
5 //
6 // PANDA 3D SOFTWARE
7 // Copyright (c) Carnegie Mellon University. All rights reserved.
8 //
9 // All use of this software is subject to the terms of the revised BSD
10 // license. You should have received a copy of this license along
11 // with this source code in a file named "LICENSE."
12 //
13 ////////////////////////////////////////////////////////////////////
14 
15 #ifndef PNMFILETYPEANDROID_H
16 #define PNMFILETYPEANDROID_H
17 
18 #ifdef ANDROID
19 
20 #include "pandabase.h"
21 
22 #include "pnmFileType.h"
23 #include "pnmReader.h"
24 #include "pnmWriter.h"
25 
26 #include <jni.h>
27 
28 ////////////////////////////////////////////////////////////////////
29 // Class : PNMFileTypeAndroid
30 // Description : Wrapper class around the Android Bitmap mechanism
31 // to allow loading images on Android without needing
32 // libpng or libjpeg.
33 ////////////////////////////////////////////////////////////////////
34 class EXPCL_PANDA_PNMIMAGETYPES PNMFileTypeAndroid : public PNMFileType {
35 public:
36  PNMFileTypeAndroid();
37 
38  virtual string get_name() const;
39 
40  virtual int get_num_extensions() const;
41  virtual string get_extension(int n) const;
42 
43  virtual bool has_magic_number() const;
44 
45  virtual PNMReader *make_reader(istream *file, bool owns_file = true,
46  const string &magic_number = string());
47 
48 public:
49  class Reader : public PNMReader {
50  public:
51  Reader(PNMFileType *type, istream *file, bool owns_file, string magic_number);
52  virtual ~Reader();
53 
54  virtual void prepare_read();
55  virtual int read_data(xel *array, xelval *alpha);
56 
57  private:
58  // It is assumed that the Reader is only used within a single thread.
59  JNIEnv *_env;
60  jobject _bitmap;
61  int _sample_size;
62  uint32_t _stride;
63  int32_t _format;
64  };
65 
66  // The TypedWritable interface follows.
67 public:
68  static void register_with_read_factory();
69 
70 protected:
71  static TypedWritable *make_PNMFileTypeAndroid(const FactoryParams &params);
72 
73 public:
74  static TypeHandle get_class_type() {
75  return _type_handle;
76  }
77  static void init_type() {
78  PNMFileType::init_type();
79  register_type(_type_handle, "PNMFileTypeAndroid",
80  PNMFileType::get_class_type());
81  }
82  virtual TypeHandle get_type() const {
83  return get_class_type();
84  }
85  virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
86 
87 private:
88  static TypeHandle _type_handle;
89 };
90 
91 #endif // ANDROID
92 
93 #endif
virtual string get_extension(int n) const
Returns the nth possible filename extension associated with this particular file type, without a leading dot.
Definition: pnmFileType.cxx:62
Base class for objects that can be written to and read from Bam files.
Definition: typedWritable.h:37
This is the base class of a family of classes that represent particular image file types that PNMImag...
Definition: pnmFileType.h:35
virtual PNMReader * make_reader(istream *file, bool owns_file=true, const string &magic_number=string())
Allocates and returns a new PNMReader suitable for reading from this file type, if possible...
An instance of this class is passed to the Factory when requesting it to do its business and construc...
Definition: factoryParams.h:40
This is an abstract base class that defines the interface for reading image files of various types...
Definition: pnmReader.h:31
virtual bool has_magic_number() const
Returns true if this particular file type uses a magic number to identify it, false otherwise...
Definition: pnmFileType.cxx:89
TypeHandle is the identifier used to differentiate C++ class types.
Definition: typeHandle.h:85
virtual int get_num_extensions() const
Returns the number of different possible filename extensions associated with this particular file typ...
Definition: pnmFileType.cxx:50