4
* Copyright (C) 2011 Tim Marston <tim@ed.am> and Dan Marston.
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
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.
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.
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/>.
24
#include "text_renderer.h"
27
#include <avr/pgmspace.h>
30
// the buffer for the message
31
char Text::_messages[ NUM_MESSAGE_BUFFERS ][ MESSAGE_BUFFER_LEN ];
33
// message buffer lengths
34
static int _message_lens[ NUM_MESSAGE_BUFFERS ];
36
// the mode that each message represents
37
static char _message_modes[ NUM_MESSAGE_BUFFERS ];
39
// mode-specific message parameters
40
static signed long _message_params[ NUM_MESSAGE_BUFFERS ];
43
static unsigned long _last_millis;
45
// duration last frame (in case we can't calculate it this frame!)
46
static unsigned long _duration;
48
// recalculate message params, based on _duration
49
static bool _do_draw_reset;
51
// recalculate messages parameters (after message reset)
52
static unsigned char _message_recalc_flags;
55
void reset_message_param( int message_num )
57
if( _message_modes[ message_num ] & Text::MODE_HSCROLL )
59
switch( _message_modes[ message_num ] & 0x1c )
61
case Text::MODE_ONEQUARTER:
62
_message_params[ message_num ] = -NUM_SEGMENTS / 4; break;
63
case Text::MODE_ONETHIRD:
64
_message_params[ message_num ] = -NUM_SEGMENTS / 3; break;
66
_message_params[ message_num ] = -NUM_SEGMENTS / 2; break;
67
case Text::MODE_TWOTHIRDS:
68
_message_params[ message_num ] = -NUM_SEGMENTS * 2 / 3; break;
69
case Text::MODE_THREEQUARTERS:
70
_message_params[ message_num ] = -NUM_SEGMENTS * 3 / 4; break;
72
_message_params[ message_num ] = -NUM_SEGMENTS; break;
77
switch( _message_modes[ message_num ] & 0x1c )
79
case Text::MODE_ONEQUARTER:
80
_message_params[ message_num ] = NUM_SEGMENTS / 4; break;
81
case Text::MODE_ONETHIRD:
82
_message_params[ message_num ] = NUM_SEGMENTS / 3; break;
84
_message_params[ message_num ] = NUM_SEGMENTS / 2; break;
85
case Text::MODE_TWOTHIRDS:
86
_message_params[ message_num ] = NUM_SEGMENTS * 2 / 3; break;
87
case Text::MODE_THREEQUARTERS:
88
_message_params[ message_num ] = NUM_SEGMENTS * 3 / 4; break;
90
_message_params[ message_num ] = NUM_SEGMENTS; break;
92
_message_params[ message_num ] = -( _message_params[ message_num ] -
93
TextRenderer::get_width( _message_lens[ message_num ] ) ) / 2;
98
void Text::set_message( int message_num, PString &pstring )
101
_message_lens[ message_num ] = pstring.length();
105
void Text::reset_message( int message_num, char mode )
107
_message_modes[ message_num ] = mode;
108
_message_recalc_flags |= 1 << message_num;
116
_last_millis = ::millis();
117
_do_draw_reset = false;
118
_message_recalc_flags = 0;
120
// reset the text renderer's output buffer
121
TextRenderer::reset_buffer();
125
void Text::draw_reset()
127
// how many milliseconds have elapsed since last frame?
128
unsigned long millis = ::millis();
129
if( millis > _last_millis )
130
_duration = millis - _last_millis;
131
_last_millis = millis;
133
_do_draw_reset = true;
137
void Text::draw( int message_num, int segment )
139
TextRenderer::buffer_in_use();
141
// perform a mid-frame reset, as necessary
142
if( _do_draw_reset && segment > NUM_SEGMENTS / 2 ) {
143
_do_draw_reset = false;
145
// reset message param?
146
if( _message_recalc_flags & ( 1 << message_num ) ) {
147
_message_recalc_flags &= ~( 1 << message_num );
148
reset_message_param( message_num );
151
// add to horizontal scroll position
152
if( _message_modes[ message_num ] & MODE_HSCROLL ) {
153
_message_params[ message_num ] +=
154
_duration * TEXT_SCROLL_SPEED / 1000;
155
long excess = _message_params[ message_num ] -
156
TextRenderer::get_width( _message_lens[ message_num ] );
158
reset_message_param( message_num );
159
_message_params[ message_num ] += excess;
164
// calculate the width
166
switch( _message_modes[ message_num ] & 0x1c )
168
case MODE_ONEQUARTER:
169
width = NUM_SEGMENTS / 4;
172
width = NUM_SEGMENTS / 3;
175
width = NUM_SEGMENTS / 2;
178
width = NUM_SEGMENTS * 2 / 3;
180
case MODE_THREEQUARTERS:
181
width = NUM_SEGMENTS * 3 / 4;
184
width = NUM_SEGMENTS;
188
// convert segment to display-space
189
switch( _message_modes[ message_num ] & 0x03 )
192
if( segment < width / 2 )
193
segment += width / 2;
194
else if( segment >= NUM_SEGMENTS - width / 2 )
195
segment -= ( NUM_SEGMENTS - width / 2 );
200
if( segment > ( NUM_SEGMENTS - width ) / 2 &&
201
segment < ( NUM_SEGMENTS - width ) / 2 + width )
203
segment = width - ( segment - ( NUM_SEGMENTS - width ) / 2 );
211
TextRenderer::render(
212
_messages[ message_num ], _message_lens[ message_num ],
213
(long)segment + _message_params[ message_num ],
214
( _message_modes[ message_num ] & 1 ) == 0, 0 );
added
removed
src/text.cc
