/elec/propeller-clock

To get this branch, use:
bzr branch http://bzr.ed.am/elec/propeller-clock

« back to all changes in this revision

Viewing changes to src/text.cc

  • Committer: Tim Marston
  • Date: 2012-03-09 23:42:20 UTC
  • Revision ID: tim@ed.am-20120309234220-xr1vxzve0o5n2oss
added support for eclipse project and converted to a manual Makefile

Show diffs side-by-side

added added

removed removed

Lines of Context:
src/text.cc
 
1
/*
 
2
 * text.cc
 
3
 *
 
4
 * Copyright (C) 2011 Tim Marston <tim@ed.am> and Dan Marston.
 
5
 *
 
6
 * This file is part of propeller-clock (hereafter referred to as "this
 
7
 * program"). See http://ed.am/dev/software/arduino/propeller-clock for more
 
8
 * information.
 
9
 *
 
10
 * This program is free software: you can redistribute it and/or modify
 
11
 * it under the terms of the GNU Lesser General Public License as published
 
12
 * by the Free Software Foundation, either version 3 of the License, or
 
13
 * (at your option) any later version.
 
14
 *
 
15
 * This program is distributed in the hope that it will be useful,
 
16
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
17
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
18
 * GNU Lesser General Public License for more details.
 
19
 *
 
20
 * You should have received a copy of the GNU Lesser General Public License
 
21
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
22
 */
 
23
#include "text.h"
 
24
#include "text_renderer.h"
 
25
#include "config.h"
 
26
#include "Arduino.h"
 
27
#include <avr/pgmspace.h>
 
28
#include "display.h"
 
29
 
 
30
 
 
31
// the buffer for the message
 
32
char Text::_messages[ NUM_MESSAGE_BUFFERS ][ MESSAGE_BUFFER_LEN ];
 
33
 
 
34
// message buffer lengths
 
35
static int _message_lens[ NUM_MESSAGE_BUFFERS ];
 
36
 
 
37
// the mode that each message represents
 
38
static char _message_modes[ NUM_MESSAGE_BUFFERS ];
 
39
 
 
40
// mode-specific message parameters
 
41
static signed long _message_params[ NUM_MESSAGE_BUFFERS ];
 
42
 
 
43
// time last frame
 
44
static unsigned long _last_millis;
 
45
 
 
46
// duration last frame (in case we can't calculate it this frame!)
 
47
static unsigned long _duration;
 
48
 
 
49
// recalculate message params, based on _duration
 
50
static bool _do_draw_reset;
 
51
 
 
52
 
 
53
void reset_message_param( int message_num )
 
54
{
 
55
        if( _message_modes[ message_num ] & Text::MODE_HSCROLL )
 
56
        {
 
57
                switch( _message_modes[ message_num ] & 0x1c )
 
58
                {
 
59
                case Text::MODE_ONEQUARTER:
 
60
                        _message_params[ message_num ] = -NUM_SEGMENTS / 4; break;
 
61
                case Text::MODE_ONETHIRD:
 
62
                        _message_params[ message_num ] = -NUM_SEGMENTS / 3; break;
 
63
                case Text::MODE_HALF:
 
64
                        _message_params[ message_num ] = -NUM_SEGMENTS / 2; break;
 
65
                case Text::MODE_TWOTHIRDS:
 
66
                        _message_params[ message_num ] = -NUM_SEGMENTS * 2 / 3; break;
 
67
                case Text::MODE_THREEQUARTERS:
 
68
                        _message_params[ message_num ] = -NUM_SEGMENTS * 3 / 4; break;
 
69
                case Text::MODE_ALL:
 
70
                        _message_params[ message_num ] = -NUM_SEGMENTS; break;
 
71
                }
 
72
        }
 
73
        else
 
74
        {
 
75
                switch( _message_modes[ message_num ] & 0x1c )
 
76
                {
 
77
                case Text::MODE_ONEQUARTER:
 
78
                        _message_params[ message_num ] = NUM_SEGMENTS / 4; break;
 
79
                case Text::MODE_ONETHIRD:
 
80
                        _message_params[ message_num ] = NUM_SEGMENTS / 3; break;
 
81
                case Text::MODE_HALF:
 
82
                        _message_params[ message_num ] = NUM_SEGMENTS / 2; break;
 
83
                case Text::MODE_TWOTHIRDS:
 
84
                        _message_params[ message_num ] = NUM_SEGMENTS * 2 / 3; break;
 
85
                case Text::MODE_THREEQUARTERS:
 
86
                        _message_params[ message_num ] = NUM_SEGMENTS * 3 / 4; break;
 
87
                case Text::MODE_ALL:
 
88
                        _message_params[ message_num ] = NUM_SEGMENTS; break;
 
89
                }
 
90
                _message_params[ message_num ] = -( _message_params[ message_num ] -
 
91
                        TextRenderer::get_width( _message_lens[ message_num ] ) ) / 2;
 
92
        }
 
93
}
 
94
 
 
95
 
 
96
void Text::set_message( int message_num, PString &pstring )
 
97
{
 
98
        // update message
 
99
        _message_lens[ message_num ] = pstring.length();
 
100
}
 
101
 
 
102
 
 
103
void Text::reset_message( int message_num, char mode )
 
104
{
 
105
        _message_modes[ message_num ] = mode;
 
106
        reset_message_param( message_num );
 
107
}
 
108
 
 
109
 
 
110
void Text::reset()
 
111
{
 
112
        // reset renderer
 
113
        _duration = 0;
 
114
        _last_millis = ::millis();
 
115
        _do_draw_reset = false;
 
116
 
 
117
        // reset the text renderer's output buffer
 
118
        TextRenderer::reset_buffer();
 
119
}
 
120
 
 
121
 
 
122
void Text::draw_reset()
 
123
{
 
124
        // how many milliseconds have elapsed since last frame?
 
125
        unsigned long millis = ::millis();
 
126
        if( millis > _last_millis )
 
127
                _duration = millis - _last_millis;
 
128
        _last_millis = millis;
 
129
 
 
130
        _do_draw_reset = true;
 
131
}
 
132
 
 
133
 
 
134
void Text::draw( int message_num, int segment )
 
135
{
 
136
        // perform a mid-frame reset, as necessary
 
137
        if( _do_draw_reset && segment > NUM_SEGMENTS / 2 ) {
 
138
                _do_draw_reset = false;
 
139
 
 
140
                if( _message_modes[ message_num ] & MODE_HSCROLL )
 
141
                {
 
142
                        // add to horizontal scroll position
 
143
                        _message_params[ message_num ] +=
 
144
                                _duration * TEXT_SCROLL_SPEED / 1000;
 
145
                        long excess = _message_params[ message_num ] -
 
146
                                TextRenderer::get_width( _message_lens[ message_num ] );
 
147
                        if( excess >= 0 ) {
 
148
                                reset_message_param( message_num );
 
149
                                _message_params[ message_num ] += excess;
 
150
                        }
 
151
                }
 
152
        }
 
153
 
 
154
        // calculate the width
 
155
        int width;
 
156
        switch( _message_modes[ message_num ] & 0x1c )
 
157
        {
 
158
        case MODE_ONEQUARTER:
 
159
                width = NUM_SEGMENTS / 4;
 
160
                break;
 
161
        case MODE_ONETHIRD:
 
162
                width = NUM_SEGMENTS / 3;
 
163
                break;
 
164
        case MODE_HALF:
 
165
                width = NUM_SEGMENTS / 2;
 
166
                break;
 
167
        case MODE_TWOTHIRDS:
 
168
                width = NUM_SEGMENTS * 2 / 3;
 
169
                break;
 
170
        case MODE_THREEQUARTERS:
 
171
                width = NUM_SEGMENTS * 3 / 4;
 
172
                break;
 
173
        case MODE_ALL:
 
174
                width = NUM_SEGMENTS;
 
175
                break;
 
176
        }
 
177
 
 
178
        // convert segment to display-space
 
179
        switch( _message_modes[ message_num ] & 0x03 )
 
180
        {
 
181
        case MODE_TOP:
 
182
                if( segment < width / 2 )
 
183
                        segment += width / 2;
 
184
                else if( segment >= NUM_SEGMENTS - width / 2 )
 
185
                        segment -= ( NUM_SEGMENTS - width / 2 );
 
186
                else
 
187
                        return;
 
188
                break;
 
189
        case MODE_BOTTOM:
 
190
                if( segment > ( NUM_SEGMENTS - width ) / 2 &&
 
191
                        segment < ( NUM_SEGMENTS - width ) / 2 + width )
 
192
                {
 
193
                        segment = width - ( segment - ( NUM_SEGMENTS - width ) / 2 );
 
194
                }               
 
195
                else
 
196
                        return;
 
197
                break;
 
198
        }
 
199
 
 
200
        // render
 
201
        TextRenderer::render(
 
202
                _messages[ message_num ], _message_lens[ message_num ],
 
203
                (long)segment + _message_params[ message_num ],
 
204
                ( _message_modes[ message_num ] & 1 ) == 0, 0 );
 
205
}