123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121 |
- /* Copyright (C) 2004-2008 Constantin Kaplinsky. All Rights Reserved.
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
- //
- // PollingManager.h
- //
-
- #ifndef __POLLINGMANAGER_H__
- #define __POLLINGMANAGER_H__
-
- #include <X11/Xlib.h>
- #include <rfb/VNCServer.h>
-
- #include <x0vncserver/Image.h>
-
- #ifdef DEBUG
- #include <x0vncserver/TimeMillis.h>
- #endif
-
- class PollingManager {
-
- public:
-
- PollingManager(Display *dpy, const Image *image, ImageFactory &factory,
- int offsetLeft = 0, int offsetTop = 0);
- virtual ~PollingManager();
-
- void poll(rfb::VNCServer *server);
-
- protected:
-
- // Screen polling. Returns true if some changes were detected.
- bool pollScreen(rfb::VNCServer *server);
-
- Display *m_dpy;
-
- const Image *m_image;
- const int m_bytesPerPixel;
-
- const int m_offsetLeft;
- const int m_offsetTop;
- const int m_width;
- const int m_height;
-
- private:
-
- inline void getRow(int x, int y, int w) {
- if (w == m_width) {
- // Getting full row may be more efficient.
- m_rowImage->get(DefaultRootWindow(m_dpy),
- m_offsetLeft, m_offsetTop + y);
- } else {
- m_rowImage->get(DefaultRootWindow(m_dpy),
- m_offsetLeft + x, m_offsetTop + y, w, 1);
- }
- }
-
- inline void getColumn(int x, int y, int h) {
- m_columnImage->get(DefaultRootWindow(m_dpy),
- m_offsetLeft + x, m_offsetTop + y, 1, h);
- }
-
- inline int getTileIndex(int x, int y) {
- int tile_x = x / 32;
- int tile_y = y / 32;
- return tile_y * m_widthTiles + tile_x;
- }
-
- int checkRow(int x, int y, int w);
- int checkColumn(int x, int y, int h, bool *pChangeFlags);
- int sendChanges(rfb::VNCServer *server) const;
-
- // Check neighboring tiles and update m_changeFlags[].
- void checkNeighbors();
-
- // DEBUG: Print the list of changed tiles.
- void printChanges(const char *header) const;
-
- // Additional images used in polling algorithms.
- Image *m_rowImage; // one row of the framebuffer
- Image *m_columnImage; // one column of the framebuffer
-
- const int m_widthTiles; // shortcut for ((m_width + 31) / 32)
- const int m_heightTiles; // shortcut for ((m_height + 31) / 32)
- const int m_numTiles; // shortcut for (m_widthTiles * m_heightTiles)
-
- // m_changeFlags[] array will hold boolean values corresponding to
- // each 32x32 tile. If a value is true, then we've detected a change
- // in that tile.
- bool *m_changeFlags;
-
- unsigned int m_pollingStep;
- static const int m_pollingOrder[];
-
- #ifdef DEBUG
- private:
-
- void debugBeforePoll();
- void debugAfterPoll();
-
- TimeMillis m_timeSaved;
- #endif
-
- };
-
- #endif // __POLLINGMANAGER_H__
|