1 /* ScummVM - Graphic Adventure Engine
2  *
3  * ScummVM is the legal property of its developers, whose names
4  * are too numerous to list here. Please refer to the COPYRIGHT
5  * file distributed with this source distribution.
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License
9  * as published by the Free Software Foundation; either version 2
10  * of the License, or (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20  *
21  *
22  * Based on the original sources
23  *   Faery Tale II -- The Halls of the Dead
24  *   (c) 1993-1996 The Wyrmkeep Entertainment Co.
25  */
26 
27 #ifndef SAGA2_IMAGCACH_H
28 #define SAGA2_IMAGCACH_H
29 
30 namespace Saga2 {
31 
32 /* ===================================================================== *
33    ImageNode class which defines a re-entrant image resource
34  * ===================================================================== */
35 
36 class CImageNode {
37 private:
38 	uint32      contextID;  // ID of context
39 	uint32      resourceID;     // RES_ID of  image
40 
41 	uint16  requested;  // the number of allocation requests made to node
42 	void    *image;     // the image
43 
44 public:
45 	CImageNode(hResContext *con, uint32 resID);
46 	~CImageNode(void);
47 
48 	void    *getImagePtr(void);
49 	bool    isSameImage(hResContext *con, uint32 resID);
50 	bool    isSameImage(void *imagePtr);
getNumRequested(void)51 	uint16  getNumRequested(void) {
52 		return requested;
53 	}
54 	bool    releaseRequest(void);
55 };
56 
57 
58 /* ===================================================================== *
59    ImageCache class which maintains a list of ImageNodes
60  * ===================================================================== */
61 
62 class CImageCache {
63 private:
64 	Common::List<CImageNode *> _nodes;    // list of ImageNode
65 
66 public:
CImageCache(void)67 	CImageCache(void) {
68 		assert(_nodes.empty());
69 	}
70 	~CImageCache(void);
71 
72 	void *requestImage(hResContext *con, uint32 resID);
73 	void releaseImage(void *);
74 };
75 
76 } // end of namespace Saga2
77 
78 #endif
79