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.
21 #include <tranzport_control_protocol.h>
25 TranzportControlProtocol::screen_clear ()
27 const char *blank = " ";
32 void TranzportControlProtocol::screen_invalidate ()
35 for(int row = 0; row < ROWS; row++) {
36 for(int col = 0; col < COLUMNS; col++) {
37 screen_current[row][col] = 0x7f;
38 screen_pending[row][col] = ' ';
39 screen_flash[row][col] = ' ';
44 void TranzportControlProtocol::screen_validate ()
48 void TranzportControlProtocol::screen_init ()
53 // FIXME: Switch to a column oriented flush to make the redraw of the
57 TranzportControlProtocol::screen_flush ()
59 int cell = 0, row=0, col_base, pending = 0;
60 const unsigned long CELL_BITS = 0x0F;
61 if ( _device_status == STATUS_OFFLINE) { return (-1); }
63 std::bitset<ROWS*COLUMNS> mask(CELL_BITS);
64 std::bitset<ROWS*COLUMNS> imask(CELL_BITS);
65 for(cell = 0; cell < 10 && pending == 0; cell++) {
66 mask = imask << (cell*4);
67 if((screen_invalid & mask).any()) {
68 /* something in this cell is different, so dump the cell to the device. */
69 #if DEBUG_TRANZPORT_SCREEN
70 printf("MASK : %s\n", mask.to_string().c_str());
72 if(cell > 4) { row = 1; } else { row = 0; }
73 col_base = (cell*4)%COLUMNS;
79 cmd[3] = screen_pending[row][col_base];
80 cmd[4] = screen_pending[row][col_base+1];
81 cmd[5] = screen_pending[row][col_base+2];
82 cmd[6] = screen_pending[row][col_base+3];
85 if((pending = lcd_write(cmd)) == 0) {
86 /* successful write: copy to current cached display */
87 screen_invalid &= mask.flip();
88 memcpy (&screen_current[row][col_base], &screen_pending[row][col_base], 4);