2 * Copyright (C) 2006 Paul Davis
3 * Copyright (C) 2007 Michael Taht
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #include <tranzport_control_protocol.h>
26 TranzportControlProtocol::screen_clear ()
28 const char *blank = " ";
33 void TranzportControlProtocol::screen_invalidate ()
36 for(int row = 0; row < ROWS; row++) {
37 for(int col = 0; col < COLUMNS; col++) {
38 screen_current[row][col] = 0x7f;
39 screen_pending[row][col] = ' ';
40 screen_flash[row][col] = ' ';
45 void TranzportControlProtocol::screen_validate ()
49 void TranzportControlProtocol::screen_init ()
54 // FIXME: Switch to a column oriented flush to make the redraw of the
58 TranzportControlProtocol::screen_flush ()
60 int cell = 0, row=0, col_base, pending = 0;
61 const unsigned long CELL_BITS = 0x0F;
62 if ( _device_status == STATUS_OFFLINE) { return (-1); }
64 std::bitset<ROWS*COLUMNS> mask(CELL_BITS);
65 std::bitset<ROWS*COLUMNS> imask(CELL_BITS);
66 for(cell = 0; cell < 10 && pending == 0; cell++) {
67 mask = imask << (cell*4);
68 if((screen_invalid & mask).any()) {
69 /* something in this cell is different, so dump the cell to the device. */
70 #if DEBUG_TRANZPORT_SCREEN
71 printf("MASK : %s\n", mask.to_string().c_str());
73 if(cell > 4) { row = 1; } else { row = 0; }
74 col_base = (cell*4)%COLUMNS;
80 cmd[3] = screen_pending[row][col_base];
81 cmd[4] = screen_pending[row][col_base+1];
82 cmd[5] = screen_pending[row][col_base+2];
83 cmd[6] = screen_pending[row][col_base+3];
86 if((pending = lcd_write(cmd)) == 0) {
87 /* successful write: copy to current cached display */
88 screen_invalid &= mask.flip();
89 memcpy (&screen_current[row][col_base], &screen_pending[row][col_base], 4);