/elec/propeller-clock

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  • Committer: Tim Marston
  • Date: 2013-03-31 17:07:11 UTC
  • Revision ID: tim@ed.am-20130331170711-okfhn3wx9y0eo99a
updated the schematic to increase minimum font size

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src/text.cc
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#include "config.h"
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#include "Arduino.h"
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#include <avr/pgmspace.h>
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#include "display.h"
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30
 
 
31
 
// the proportion of the display to use (in segments)
32
 
#define BIG_SEGMENTS ( NUM_SEGMENTS * 2 / 3 )
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#define SMALL_SEGMENTS ( NUM_SEGMENTS - BIG_TEXT_SEGMENTS )
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#define HALF_SEGMENTS ( NUM_SEGMENTS / 2 )
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// the buffer for the message
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static char _message_modes[ NUM_MESSAGE_BUFFERS ];
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// mode-specific message parameters
47
 
static signed long _message_params[ NUM_MESSAGE_BUFFERS ];
 
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static signed long _message_pos[ NUM_MESSAGE_BUFFERS ];
 
41
 
 
42
// text scaling factors
 
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static char _message_scale[ NUM_MESSAGE_BUFFERS ];
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// time last frame
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static unsigned long _last_millis;
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static bool _do_draw_reset;
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58
54
 
59
 
void reset_message_param( int message_num )
60
 
{
61
 
        switch( _message_modes[ message_num ] )
62
 
        {
63
 
        case 'S':
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                _message_params[ message_num ] = -BIG_SEGMENTS;
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                break;
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        case 's':
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                _message_params[ message_num ] = -HALF_SEGMENTS;
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                break;
69
 
        case 'B':
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        case 'T':
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                _message_params[ message_num ] = -( BIG_SEGMENTS -
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                        TextRenderer::get_width( _message_lens[ message_num ] ) ) / 2;
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                break;
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        case 'b':
75
 
        case 't':
76
 
                _message_params[ message_num ] = -( HALF_SEGMENTS -
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                        TextRenderer::get_width( _message_lens[ message_num ] ) ) / 2;
78
 
                break;
79
 
        }
80
 
}
81
 
 
82
 
 
83
 
void Text::set_message( int message_num, PString &pstring )
84
 
{
85
 
        // update message
86
 
        _message_lens[ message_num ] = pstring.length();
87
 
}
88
 
 
89
 
 
90
 
void Text::set_message_mode( int message_num, char mode )
91
 
{
92
 
        _message_modes[ message_num ] = mode;
93
 
        reset_message_param( message_num );
 
55
#define MASK_MODE_SIZE 0x07
 
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#define MASK_MODE_POS 0x40
 
57
 
 
58
void reset_message_pos( int message_num )
 
59
{
 
60
        if( _message_modes[ message_num ] & Text::MODE_HSCROLL )
 
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        {
 
62
                switch( _message_modes[ message_num ] & MASK_MODE_SIZE )
 
63
                {
 
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                case Text::MODE_ONEQUARTER:
 
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                        _message_pos[ message_num ] = -NUM_SEGMENTS / 4; break;
 
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                case Text::MODE_ONETHIRD:
 
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                        _message_pos[ message_num ] = -NUM_SEGMENTS / 3; break;
 
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                case Text::MODE_HALF:
 
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                        _message_pos[ message_num ] = -NUM_SEGMENTS / 2; break;
 
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                case Text::MODE_TWOTHIRDS:
 
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                        _message_pos[ message_num ] = -NUM_SEGMENTS * 2 / 3; break;
 
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                case Text::MODE_THREEQUARTERS:
 
73
                        _message_pos[ message_num ] = -NUM_SEGMENTS * 3 / 4; break;
 
74
                case Text::MODE_ALL:
 
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                        _message_pos[ message_num ] = -NUM_SEGMENTS; break;
 
76
                }
 
77
        }
 
78
        else
 
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        {
 
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                switch( _message_modes[ message_num ] & MASK_MODE_SIZE )
 
81
                {
 
82
                case Text::MODE_ONEQUARTER:
 
83
                        _message_pos[ message_num ] = NUM_SEGMENTS / 4; break;
 
84
                case Text::MODE_ONETHIRD:
 
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                        _message_pos[ message_num ] = NUM_SEGMENTS / 3; break;
 
86
                case Text::MODE_HALF:
 
87
                        _message_pos[ message_num ] = NUM_SEGMENTS / 2; break;
 
88
                case Text::MODE_TWOTHIRDS:
 
89
                        _message_pos[ message_num ] = NUM_SEGMENTS * 2 / 3; break;
 
90
                case Text::MODE_THREEQUARTERS:
 
91
                        _message_pos[ message_num ] = NUM_SEGMENTS * 3 / 4; break;
 
92
                case Text::MODE_ALL:
 
93
                        _message_pos[ message_num ] = NUM_SEGMENTS; break;
 
94
                }
 
95
                _message_pos[ message_num ] = -( _message_pos[ message_num ] -
 
96
                        TextRenderer::get_width( _message_lens[ message_num ],
 
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                                        _message_scale[ message_num ] ) ) / 2;
 
98
        }
94
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}
95
100
 
96
101
 
99
104
        // reset renderer
100
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        _duration = 0;
101
106
        _last_millis = ::millis();
102
 
        _do_draw_reset = false;
 
107
 
 
108
        // clear all message modes (disable messages)
 
109
        for( int a = 0; a < NUM_MESSAGE_BUFFERS; a++ )
 
110
                _message_modes[ a ] = 0;
103
111
 
104
112
        // reset the text renderer's output buffer
105
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        TextRenderer::reset_buffer();
106
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}
107
115
 
108
116
 
 
117
void Text::set_up_message( int message_num, char mode, char scale )
 
118
{
 
119
        _message_modes[ message_num ] = mode;
 
120
        _message_scale[ message_num ] = scale;
 
121
 
 
122
        // horizontal scrolling messages need their position reset at start of mode
 
123
        if( _message_modes[ message_num ] & MODE_HSCROLL )
 
124
                reset_message_pos( message_num );
 
125
}
 
126
 
 
127
 
 
128
void Text::set_message_text( int message_num, PString &pstring )
 
129
{
 
130
        // update message
 
131
        _message_lens[ message_num ] = pstring.length();
 
132
 
 
133
        // non-horizontal scrolling modes need their position reset whenever the
 
134
        // text changes
 
135
        if( !( _message_modes[ message_num ] & MODE_HSCROLL ) )
 
136
                reset_message_pos( message_num );
 
137
}
 
138
 
 
139
 
109
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void Text::draw_reset()
110
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{
111
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        // how many milliseconds have elapsed since last frame?
114
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                _duration = millis - _last_millis;
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        _last_millis = millis;
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148
        // we'll need to recalculate params for the frame, but we want to do it when
 
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        // we're not in the middle of a text display (to avoid tearing).
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        _do_draw_reset = true;
118
151
}
119
152
 
120
153
 
121
 
void Text::draw( int message_num, int segment )
 
154
static void draw_message( int message_num, int segment )
122
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{
123
 
        // perform a mid-frame reset, as necessary
124
 
        if( _do_draw_reset && segment > NUM_SEGMENTS / 2 ) {
125
 
                _do_draw_reset = false;
126
 
 
127
 
                if( _message_modes[ message_num ] & MODE_HSCROLL )
128
 
                {
129
 
                        // add to horizontal scroll position
130
 
                        _message_params[ message_num ] +=
131
 
                                _duration * TEXT_SCROLL_SPEED / 1000;
132
 
                        long excess = _message_params[ message_num ] -
133
 
                                TextRenderer::get_width( _message_lens[ message_num ] );
134
 
                        if( excess >= 0 ) {
135
 
                                reset_message_param( message_num );
136
 
                                _message_params[ message_num ] += excess;
137
 
                        }
138
 
                }
139
 
        }
 
156
        TextRenderer::buffer_in_use();
140
157
 
141
158
        // calculate the width
142
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        int width;
143
 
        switch( _message_modes[ message_num ] & 0x1c )
 
160
        switch( _message_modes[ message_num ] & MASK_MODE_SIZE )
144
161
        {
145
 
        case MODE_ONEQUARTER:
 
162
        case Text::MODE_ONEQUARTER:
146
163
                width = NUM_SEGMENTS / 4;
147
164
                break;
148
 
        case MODE_ONETHIRD:
 
165
        case Text::MODE_ONETHIRD:
149
166
                width = NUM_SEGMENTS / 3;
150
167
                break;
151
 
        case MODE_HALF:
 
168
        case Text::MODE_HALF:
152
169
                width = NUM_SEGMENTS / 2;
153
170
                break;
154
 
        case MODE_TWOTHIRDS:
 
171
        case Text::MODE_TWOTHIRDS:
155
172
                width = NUM_SEGMENTS * 2 / 3;
156
173
                break;
157
 
        case MODE_THREEQUARTERS:
 
174
        case Text::MODE_THREEQUARTERS:
158
175
                width = NUM_SEGMENTS * 3 / 4;
159
176
                break;
160
 
        case MODE_ALL:
 
177
        case Text::MODE_ALL:
161
178
                width = NUM_SEGMENTS;
162
179
                break;
163
180
        }
164
181
 
165
182
        // convert segment to display-space
166
 
        switch( _message_modes[ message_num ] & 0x03 )
 
183
        switch( _message_modes[ message_num ] & MASK_MODE_POS )
167
184
        {
168
 
        case MODE_TOP:
 
185
        case Text::MODE_TOP:
169
186
                if( segment < width / 2 )
170
187
                        segment += width / 2;
171
188
                else if( segment >= NUM_SEGMENTS - width / 2 )
173
190
                else
174
191
                        return;
175
192
                break;
176
 
        case MODE_BOTTOM:
 
193
        case Text::MODE_BOTTOM:
177
194
                if( segment > ( NUM_SEGMENTS - width ) / 2 &&
178
195
                        segment < ( NUM_SEGMENTS - width ) / 2 + width )
179
 
                        segment -= ( NUM_SEGMENTS - width ) / 2;
 
196
                {
 
197
                        segment = width - ( segment - ( NUM_SEGMENTS - width ) / 2 );
 
198
                }               
180
199
                else
181
200
                        return;
182
201
                break;
184
203
 
185
204
        // render
186
205
        TextRenderer::render(
187
 
                _messages[ message_num ], _message_lens[ message_num ],
188
 
                (long)segment + _message_params[ message_num ],
189
 
                _message_modes[ message_num ] & 1 == 0, 0 );
190
 
}
 
206
                Text::_messages[ message_num ], _message_lens[ message_num ],
 
207
                (long)segment + _message_pos[ message_num ],
 
208
                ( _message_modes[ message_num ] & MASK_MODE_POS ) == Text::MODE_BOTTOM,
 
209
                0, _message_scale[ message_num ] );
 
210
}
 
211
 
 
212
 
 
213
void Text::draw( int segment )
 
214
{
 
215
        // perform a mid-frame reset, as necessary
 
216
        if( _do_draw_reset && segment == NUM_SEGMENTS / 2 ) {
 
217
                _do_draw_reset = false;
 
218
 
 
219
                // go through the messages looking for an active one
 
220
                for( int a = 0; a < NUM_MESSAGE_BUFFERS; a++ )
 
221
                        if( _message_modes[ a ] & MASK_MODE_SIZE )
 
222
                        {
 
223
                                // add to horizontal scroll position
 
224
                                if( _message_modes[ a ] & Text::MODE_HSCROLL ) {
 
225
                                        _message_pos[ a ] +=
 
226
                                                        _duration * TEXT_SCROLL_SPEED / 1000;
 
227
                                        long excess = _message_pos[ a ] -
 
228
                                                        TextRenderer::get_width( _message_lens[ a ],
 
229
                                                                        _message_scale[ a ] );
 
230
                                        if( excess >= 0 ) {
 
231
                                                reset_message_pos( a );
 
232
                                                _message_pos[ a ] += excess;
 
233
                                        }
 
234
                                }
 
235
                        }
 
236
        }
 
237
 
 
238
        // draw any active messages
 
239
        for( int a = 0; a < NUM_MESSAGE_BUFFERS; a++ )
 
240
                if( _message_modes[ a ] & MASK_MODE_SIZE )
 
241
                        draw_message( a, segment );
 
242
}
 
243