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Constantin Kaplinsky82f7b012008-05-30 10:03:30 +00001/* Copyright (C) 2004-2008 Constantin Kaplinsky. All Rights Reserved.
Constantin Kaplinskyb30ae7f2006-05-25 05:04:46 +00002 *
3 * This is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
7 *
8 * This software is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this software; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
16 * USA.
17 */
18
19//
20// PollingManager.h
21//
22
23#ifndef __POLLINGMANAGER_H__
24#define __POLLINGMANAGER_H__
25
26#include <X11/Xlib.h>
27#include <rfb/VNCServer.h>
28
29#include <x0vncserver/Image.h>
30
31#ifdef DEBUG
32#include <x0vncserver/TimeMillis.h>
33#endif
34
35using namespace rfb;
36
37class PollingManager {
38
39public:
40
Constantin Kaplinsky303433a2008-06-04 05:57:06 +000041 PollingManager(Display *dpy, const Image *image, ImageFactory &factory,
Constantin Kaplinskyb30ae7f2006-05-25 05:04:46 +000042 int offsetLeft = 0, int offsetTop = 0);
43 virtual ~PollingManager();
44
Constantin Kaplinsky54cfef32008-06-03 07:04:17 +000045 void poll(VNCServer *server);
Constantin Kaplinskyb30ae7f2006-05-25 05:04:46 +000046
Constantin Kaplinskyb30ae7f2006-05-25 05:04:46 +000047protected:
48
Constantin Kaplinsky9ee8dc62007-10-09 07:46:32 +000049 // Screen polling. Returns true if some changes were detected.
Constantin Kaplinsky54cfef32008-06-03 07:04:17 +000050 bool pollScreen(VNCServer *server);
Constantin Kaplinskyb30ae7f2006-05-25 05:04:46 +000051
Constantin Kaplinskyb30ae7f2006-05-25 05:04:46 +000052 Display *m_dpy;
Constantin Kaplinskyb30ae7f2006-05-25 05:04:46 +000053
Constantin Kaplinsky429ea962008-06-02 11:56:57 +000054 const Image *m_image;
Constantin Kaplinskyadebffb2008-01-18 14:33:05 +000055 const int m_bytesPerPixel;
Constantin Kaplinskyec45c482008-01-18 14:13:16 +000056
Constantin Kaplinskyadebffb2008-01-18 14:33:05 +000057 const int m_offsetLeft;
58 const int m_offsetTop;
59 const int m_width;
60 const int m_height;
Constantin Kaplinskyb30ae7f2006-05-25 05:04:46 +000061
Constantin Kaplinskyb30ae7f2006-05-25 05:04:46 +000062private:
63
Constantin Kaplinskybc6b9e22007-10-04 11:43:41 +000064 inline void getRow(int x, int y, int w) {
Constantin Kaplinsky41de2422008-01-19 09:03:47 +000065 if (w == m_width) {
66 // Getting full row may be more efficient.
67 m_rowImage->get(DefaultRootWindow(m_dpy),
68 m_offsetLeft, m_offsetTop + y);
69 } else {
70 m_rowImage->get(DefaultRootWindow(m_dpy),
71 m_offsetLeft + x, m_offsetTop + y, w, 1);
72 }
Constantin Kaplinskybc6b9e22007-10-04 11:43:41 +000073 }
74
75 inline void getColumn(int x, int y, int h) {
Constantin Kaplinskyed3cf5d2007-12-28 17:59:10 +000076 m_columnImage->get(DefaultRootWindow(m_dpy),
77 m_offsetLeft + x, m_offsetTop + y, 1, h);
Constantin Kaplinskybc6b9e22007-10-04 11:43:41 +000078 }
79
Constantin Kaplinsky04aa5202008-01-18 15:37:15 +000080 inline int getTileIndex(int x, int y) {
81 int tile_x = x / 32;
82 int tile_y = y / 32;
83 return tile_y * m_widthTiles + tile_x;
84 }
85
Constantin Kaplinsky9d37e5c2008-01-18 11:17:26 +000086 int checkRow(int x, int y, int w);
Constantin Kaplinsky553340c2007-12-28 18:37:04 +000087 int checkColumn(int x, int y, int h, bool *pChangeFlags);
Constantin Kaplinsky54cfef32008-06-03 07:04:17 +000088 int sendChanges(VNCServer *server);
Constantin Kaplinskybd390352007-12-28 08:44:59 +000089
Constantin Kaplinsky850de2b2008-01-17 19:14:37 +000090 // Check neighboring tiles and update m_changeFlags[].
91 void checkNeighbors();
Constantin Kaplinsky553340c2007-12-28 18:37:04 +000092
Constantin Kaplinskyf50bd7f2008-01-10 15:27:42 +000093 // DEBUG: Print the list of changed tiles.
Constantin Kaplinsky850de2b2008-01-17 19:14:37 +000094 void printChanges(const char *header) const;
Constantin Kaplinskyf50bd7f2008-01-10 15:27:42 +000095
Constantin Kaplinskyb30ae7f2006-05-25 05:04:46 +000096 // Additional images used in polling algorithms.
Constantin Kaplinskyed3cf5d2007-12-28 17:59:10 +000097 Image *m_rowImage; // one row of the framebuffer
98 Image *m_columnImage; // one column of the framebuffer
Constantin Kaplinskyb30ae7f2006-05-25 05:04:46 +000099
Constantin Kaplinskyadebffb2008-01-18 14:33:05 +0000100 const int m_widthTiles; // shortcut for ((m_width + 31) / 32)
101 const int m_heightTiles; // shortcut for ((m_height + 31) / 32)
102 const int m_numTiles; // shortcut for (m_widthTiles * m_heightTiles)
Constantin Kaplinsky20390a22008-01-17 15:17:36 +0000103
Constantin Kaplinsky85b5eb92008-01-17 17:41:48 +0000104 // m_changeFlags[] array will hold boolean values corresponding to
105 // each 32x32 tile. If a value is true, then we've detected a change
106 // in that tile.
107 bool *m_changeFlags;
108
Constantin Kaplinskyb30ae7f2006-05-25 05:04:46 +0000109 unsigned int m_pollingStep;
110 static const int m_pollingOrder[];
111
Constantin Kaplinskyb30ae7f2006-05-25 05:04:46 +0000112#ifdef DEBUG
113private:
114
115 void debugBeforePoll();
116 void debugAfterPoll();
117
118 TimeMillis m_timeSaved;
119#endif
120
121};
122
123#endif // __POLLINGMANAGER_H__