/elec/propeller-clock

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  • Committer: Tim Marston
  • Date: 2012-03-10 13:04:29 UTC
  • Revision ID: tim@ed.am-20120310130429-310w5ejo968mc6mo
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src/text.cc
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static char _message_modes[ NUM_MESSAGE_BUFFERS ];
38
38
 
39
39
// mode-specific message parameters
40
 
static signed long _message_pos[ NUM_MESSAGE_BUFFERS ];
41
 
 
42
 
// text scaling factors
43
 
static char _message_scale[ NUM_MESSAGE_BUFFERS ];
 
40
static signed long _message_params[ NUM_MESSAGE_BUFFERS ];
44
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45
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// time last frame
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static unsigned long _last_millis;
52
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static bool _do_draw_reset;
53
50
 
54
51
 
55
 
#define MASK_MODE_SIZE 0x07
56
 
#define MASK_MODE_POS 0x40
57
 
 
58
 
void reset_message_pos( int message_num )
 
52
void reset_message_param( int message_num )
59
53
{
60
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        if( _message_modes[ message_num ] & Text::MODE_HSCROLL )
61
55
        {
62
 
                switch( _message_modes[ message_num ] & MASK_MODE_SIZE )
 
56
                switch( _message_modes[ message_num ] & 0x1c )
63
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                {
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58
                case Text::MODE_ONEQUARTER:
65
 
                        _message_pos[ message_num ] = -NUM_SEGMENTS / 4; break;
 
59
                        _message_params[ message_num ] = -NUM_SEGMENTS / 4; break;
66
60
                case Text::MODE_ONETHIRD:
67
 
                        _message_pos[ message_num ] = -NUM_SEGMENTS / 3; break;
 
61
                        _message_params[ message_num ] = -NUM_SEGMENTS / 3; break;
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62
                case Text::MODE_HALF:
69
 
                        _message_pos[ message_num ] = -NUM_SEGMENTS / 2; break;
 
63
                        _message_params[ message_num ] = -NUM_SEGMENTS / 2; break;
70
64
                case Text::MODE_TWOTHIRDS:
71
 
                        _message_pos[ message_num ] = -NUM_SEGMENTS * 2 / 3; break;
 
65
                        _message_params[ message_num ] = -NUM_SEGMENTS * 2 / 3; break;
72
66
                case Text::MODE_THREEQUARTERS:
73
 
                        _message_pos[ message_num ] = -NUM_SEGMENTS * 3 / 4; break;
 
67
                        _message_params[ message_num ] = -NUM_SEGMENTS * 3 / 4; break;
74
68
                case Text::MODE_ALL:
75
 
                        _message_pos[ message_num ] = -NUM_SEGMENTS; break;
 
69
                        _message_params[ message_num ] = -NUM_SEGMENTS; break;
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                }
77
71
        }
78
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        else
79
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        {
80
 
                switch( _message_modes[ message_num ] & MASK_MODE_SIZE )
 
74
                switch( _message_modes[ message_num ] & 0x1c )
81
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                {
82
76
                case Text::MODE_ONEQUARTER:
83
 
                        _message_pos[ message_num ] = NUM_SEGMENTS / 4; break;
 
77
                        _message_params[ message_num ] = NUM_SEGMENTS / 4; break;
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78
                case Text::MODE_ONETHIRD:
85
 
                        _message_pos[ message_num ] = NUM_SEGMENTS / 3; break;
 
79
                        _message_params[ message_num ] = NUM_SEGMENTS / 3; break;
86
80
                case Text::MODE_HALF:
87
 
                        _message_pos[ message_num ] = NUM_SEGMENTS / 2; break;
 
81
                        _message_params[ message_num ] = NUM_SEGMENTS / 2; break;
88
82
                case Text::MODE_TWOTHIRDS:
89
 
                        _message_pos[ message_num ] = NUM_SEGMENTS * 2 / 3; break;
 
83
                        _message_params[ message_num ] = NUM_SEGMENTS * 2 / 3; break;
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84
                case Text::MODE_THREEQUARTERS:
91
 
                        _message_pos[ message_num ] = NUM_SEGMENTS * 3 / 4; break;
 
85
                        _message_params[ message_num ] = NUM_SEGMENTS * 3 / 4; break;
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86
                case Text::MODE_ALL:
93
 
                        _message_pos[ message_num ] = NUM_SEGMENTS; break;
 
87
                        _message_params[ message_num ] = NUM_SEGMENTS; break;
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88
                }
95
 
                _message_pos[ message_num ] = -( _message_pos[ message_num ] -
96
 
                        TextRenderer::get_width( _message_lens[ message_num ],
97
 
                                        _message_scale[ message_num ] ) ) / 2;
 
89
                _message_params[ message_num ] = -( _message_params[ message_num ] -
 
90
                        TextRenderer::get_width( _message_lens[ message_num ] ) ) / 2;
98
91
        }
99
92
}
100
93
 
101
94
 
 
95
void Text::set_message( int message_num, PString &pstring )
 
96
{
 
97
        // update message
 
98
        _message_lens[ message_num ] = pstring.length();
 
99
}
 
100
 
 
101
 
 
102
void Text::reset_message( int message_num, char mode )
 
103
{
 
104
        _message_modes[ message_num ] = mode;
 
105
        reset_message_param( message_num );
 
106
}
 
107
 
 
108
 
102
109
void Text::reset()
103
110
{
104
111
        // reset renderer
105
112
        _duration = 0;
106
113
        _last_millis = ::millis();
107
 
 
108
 
        // clear all message modes (disable messages)
109
 
        for( int a = 0; a < NUM_MESSAGE_BUFFERS; a++ )
110
 
                _message_modes[ a ] = 0;
 
114
        _do_draw_reset = false;
111
115
 
112
116
        // reset the text renderer's output buffer
113
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        TextRenderer::reset_buffer();
114
118
}
115
119
 
116
120
 
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
 
 
140
121
void Text::draw_reset()
141
122
{
142
123
        // how many milliseconds have elapsed since last frame?
145
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                _duration = millis - _last_millis;
146
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        _last_millis = millis;
147
128
 
148
 
        // we'll need to recalculate params for the frame, but we want to do it when
149
 
        // we're not in the middle of a text display (to avoid tearing).
150
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        _do_draw_reset = true;
151
130
}
152
131
 
153
132
 
154
 
static void draw_message( int message_num, int segment )
 
133
void Text::draw( int message_num, int segment )
155
134
{
156
 
        TextRenderer::buffer_in_use();
 
135
        // perform a mid-frame reset, as necessary
 
136
        if( _do_draw_reset && segment > NUM_SEGMENTS / 2 ) {
 
137
                _do_draw_reset = false;
 
138
 
 
139
                if( _message_modes[ message_num ] & MODE_HSCROLL )
 
140
                {
 
141
                        // add to horizontal scroll position
 
142
                        _message_params[ message_num ] +=
 
143
                                _duration * TEXT_SCROLL_SPEED / 1000;
 
144
                        long excess = _message_params[ message_num ] -
 
145
                                TextRenderer::get_width( _message_lens[ message_num ] );
 
146
                        if( excess >= 0 ) {
 
147
                                reset_message_param( message_num );
 
148
                                _message_params[ message_num ] += excess;
 
149
                        }
 
150
                }
 
151
        }
157
152
 
158
153
        // calculate the width
159
154
        int width;
160
 
        switch( _message_modes[ message_num ] & MASK_MODE_SIZE )
 
155
        switch( _message_modes[ message_num ] & 0x1c )
161
156
        {
162
 
        case Text::MODE_ONEQUARTER:
 
157
        case MODE_ONEQUARTER:
163
158
                width = NUM_SEGMENTS / 4;
164
159
                break;
165
 
        case Text::MODE_ONETHIRD:
 
160
        case MODE_ONETHIRD:
166
161
                width = NUM_SEGMENTS / 3;
167
162
                break;
168
 
        case Text::MODE_HALF:
 
163
        case MODE_HALF:
169
164
                width = NUM_SEGMENTS / 2;
170
165
                break;
171
 
        case Text::MODE_TWOTHIRDS:
 
166
        case MODE_TWOTHIRDS:
172
167
                width = NUM_SEGMENTS * 2 / 3;
173
168
                break;
174
 
        case Text::MODE_THREEQUARTERS:
 
169
        case MODE_THREEQUARTERS:
175
170
                width = NUM_SEGMENTS * 3 / 4;
176
171
                break;
177
 
        case Text::MODE_ALL:
 
172
        case MODE_ALL:
178
173
                width = NUM_SEGMENTS;
179
174
                break;
180
175
        }
181
176
 
182
177
        // convert segment to display-space
183
 
        switch( _message_modes[ message_num ] & MASK_MODE_POS )
 
178
        switch( _message_modes[ message_num ] & 0x03 )
184
179
        {
185
 
        case Text::MODE_TOP:
 
180
        case MODE_TOP:
186
181
                if( segment < width / 2 )
187
182
                        segment += width / 2;
188
183
                else if( segment >= NUM_SEGMENTS - width / 2 )
190
185
                else
191
186
                        return;
192
187
                break;
193
 
        case Text::MODE_BOTTOM:
 
188
        case MODE_BOTTOM:
194
189
                if( segment > ( NUM_SEGMENTS - width ) / 2 &&
195
190
                        segment < ( NUM_SEGMENTS - width ) / 2 + width )
196
191
                {
203
198
 
204
199
        // render
205
200
        TextRenderer::render(
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
 
 
 
201
                _messages[ message_num ], _message_lens[ message_num ],
 
202
                (long)segment + _message_params[ message_num ],
 
203
                ( _message_modes[ message_num ] & 1 ) == 0, 0 );
 
204
}