/elec/propeller-clock

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  • Committer: Tim Marston
  • Date: 2012-04-29 15:27:19 UTC
  • Revision ID: tim@ed.am-20120429152719-4cu2t9lx7bxpbml1
added adjustable text scaling factor

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src/text.cc
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static char _message_modes[ NUM_MESSAGE_BUFFERS ];
38
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39
39
// mode-specific message parameters
40
 
static signed long _message_pos[ NUM_MESSAGE_BUFFERS ];
 
40
static signed long _message_params[ NUM_MESSAGE_BUFFERS ];
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42
42
// text scaling factors
43
 
static char _message_scale[ NUM_MESSAGE_BUFFERS ];
 
43
static int _message_scale[ NUM_MESSAGE_BUFFERS ];
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45
45
// time last frame
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static unsigned long _last_millis;
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// recalculate message params, based on _duration
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static bool _do_draw_reset;
53
53
 
54
 
 
55
 
#define MASK_MODE_SIZE 0x07
56
 
#define MASK_MODE_POS 0x40
57
 
 
58
 
void reset_message_pos( int message_num )
 
54
// recalculate messages parameters (after message reset)
 
55
static unsigned char _message_recalc_flags;
 
56
 
 
57
 
 
58
void reset_message_param( int message_num )
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{
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        if( _message_modes[ message_num ] & Text::MODE_HSCROLL )
61
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        {
62
 
                switch( _message_modes[ message_num ] & MASK_MODE_SIZE )
 
62
                switch( _message_modes[ message_num ] & 0x1c )
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63
                {
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                case Text::MODE_ONEQUARTER:
65
 
                        _message_pos[ message_num ] = -NUM_SEGMENTS / 4; break;
 
65
                        _message_params[ message_num ] = -NUM_SEGMENTS / 4; break;
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66
                case Text::MODE_ONETHIRD:
67
 
                        _message_pos[ message_num ] = -NUM_SEGMENTS / 3; break;
 
67
                        _message_params[ message_num ] = -NUM_SEGMENTS / 3; break;
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68
                case Text::MODE_HALF:
69
 
                        _message_pos[ message_num ] = -NUM_SEGMENTS / 2; break;
 
69
                        _message_params[ message_num ] = -NUM_SEGMENTS / 2; break;
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70
                case Text::MODE_TWOTHIRDS:
71
 
                        _message_pos[ message_num ] = -NUM_SEGMENTS * 2 / 3; break;
 
71
                        _message_params[ message_num ] = -NUM_SEGMENTS * 2 / 3; break;
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72
                case Text::MODE_THREEQUARTERS:
73
 
                        _message_pos[ message_num ] = -NUM_SEGMENTS * 3 / 4; break;
 
73
                        _message_params[ message_num ] = -NUM_SEGMENTS * 3 / 4; break;
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74
                case Text::MODE_ALL:
75
 
                        _message_pos[ message_num ] = -NUM_SEGMENTS; break;
 
75
                        _message_params[ message_num ] = -NUM_SEGMENTS; break;
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                }
77
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        }
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        else
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        {
80
 
                switch( _message_modes[ message_num ] & MASK_MODE_SIZE )
 
80
                switch( _message_modes[ message_num ] & 0x1c )
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                {
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                case Text::MODE_ONEQUARTER:
83
 
                        _message_pos[ message_num ] = NUM_SEGMENTS / 4; break;
 
83
                        _message_params[ message_num ] = NUM_SEGMENTS / 4; break;
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                case Text::MODE_ONETHIRD:
85
 
                        _message_pos[ message_num ] = NUM_SEGMENTS / 3; break;
 
85
                        _message_params[ message_num ] = NUM_SEGMENTS / 3; break;
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                case Text::MODE_HALF:
87
 
                        _message_pos[ message_num ] = NUM_SEGMENTS / 2; break;
 
87
                        _message_params[ message_num ] = NUM_SEGMENTS / 2; break;
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                case Text::MODE_TWOTHIRDS:
89
 
                        _message_pos[ message_num ] = NUM_SEGMENTS * 2 / 3; break;
 
89
                        _message_params[ message_num ] = NUM_SEGMENTS * 2 / 3; break;
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90
                case Text::MODE_THREEQUARTERS:
91
 
                        _message_pos[ message_num ] = NUM_SEGMENTS * 3 / 4; break;
 
91
                        _message_params[ message_num ] = NUM_SEGMENTS * 3 / 4; break;
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                case Text::MODE_ALL:
93
 
                        _message_pos[ message_num ] = NUM_SEGMENTS; break;
 
93
                        _message_params[ message_num ] = NUM_SEGMENTS; break;
94
94
                }
95
 
                _message_pos[ message_num ] = -( _message_pos[ message_num ] -
 
95
                _message_params[ message_num ] = -( _message_params[ message_num ] -
96
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                        TextRenderer::get_width( _message_lens[ message_num ],
97
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                                        _message_scale[ message_num ] ) ) / 2;
98
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        }
99
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}
100
100
 
101
101
 
 
102
void Text::set_message( int message_num, PString &pstring )
 
103
{
 
104
        // update message
 
105
        _message_lens[ message_num ] = pstring.length();
 
106
}
 
107
 
 
108
 
 
109
void Text::reset_message( int message_num, char mode, int scale )
 
110
{
 
111
        _message_modes[ message_num ] = mode;
 
112
        _message_recalc_flags |= 1 << message_num;
 
113
        _message_scale[ message_num ] = scale;
 
114
}
 
115
 
 
116
 
102
117
void Text::reset()
103
118
{
104
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        // reset renderer
105
120
        _duration = 0;
106
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        _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;
 
122
        _do_draw_reset = false;
 
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        _message_recalc_flags = 0;
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124
 
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        // reset the text renderer's output buffer
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        TextRenderer::reset_buffer();
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}
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116
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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
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void Text::draw_reset()
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{
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        // how many milliseconds have elapsed since last frame?
145
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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
149
 
        // we're not in the middle of a text display (to avoid tearing).
150
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        _do_draw_reset = true;
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}
152
140
 
153
141
 
154
 
static void draw_message( int message_num, int segment )
 
142
void Text::draw( int message_num, int segment )
155
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{
156
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        TextRenderer::buffer_in_use();
157
145
 
 
146
        // perform a mid-frame reset, as necessary
 
147
        if( _do_draw_reset && segment > NUM_SEGMENTS / 2 ) {
 
148
                _do_draw_reset = false;
 
149
 
 
150
                // reset message param?
 
151
                if( _message_recalc_flags & ( 1 << message_num ) ) {
 
152
                        _message_recalc_flags &= ~( 1 << message_num );
 
153
                        reset_message_param( message_num );
 
154
                }
 
155
 
 
156
                // add to horizontal scroll position
 
157
                if( _message_modes[ message_num ] & MODE_HSCROLL ) {
 
158
                        _message_params[ message_num ] +=
 
159
                                _duration * TEXT_SCROLL_SPEED / 1000;
 
160
                        long excess = _message_params[ message_num ] -
 
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                                TextRenderer::get_width( _message_lens[ message_num ],
 
162
                                                _message_scale[ message_num ] );
 
163
                        if( excess >= 0 ) {
 
164
                                reset_message_param( message_num );
 
165
                                _message_params[ message_num ] += excess;
 
166
                        }
 
167
                }
 
168
        }
 
169
 
158
170
        // calculate the width
159
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        int width;
160
 
        switch( _message_modes[ message_num ] & MASK_MODE_SIZE )
 
172
        switch( _message_modes[ message_num ] & 0x1c )
161
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        {
162
 
        case Text::MODE_ONEQUARTER:
 
174
        case MODE_ONEQUARTER:
163
175
                width = NUM_SEGMENTS / 4;
164
176
                break;
165
 
        case Text::MODE_ONETHIRD:
 
177
        case MODE_ONETHIRD:
166
178
                width = NUM_SEGMENTS / 3;
167
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                break;
168
 
        case Text::MODE_HALF:
 
180
        case MODE_HALF:
169
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                width = NUM_SEGMENTS / 2;
170
182
                break;
171
 
        case Text::MODE_TWOTHIRDS:
 
183
        case MODE_TWOTHIRDS:
172
184
                width = NUM_SEGMENTS * 2 / 3;
173
185
                break;
174
 
        case Text::MODE_THREEQUARTERS:
 
186
        case MODE_THREEQUARTERS:
175
187
                width = NUM_SEGMENTS * 3 / 4;
176
188
                break;
177
 
        case Text::MODE_ALL:
 
189
        case MODE_ALL:
178
190
                width = NUM_SEGMENTS;
179
191
                break;
180
192
        }
181
193
 
182
194
        // convert segment to display-space
183
 
        switch( _message_modes[ message_num ] & MASK_MODE_POS )
 
195
        switch( _message_modes[ message_num ] & 0x03 )
184
196
        {
185
 
        case Text::MODE_TOP:
 
197
        case MODE_TOP:
186
198
                if( segment < width / 2 )
187
199
                        segment += width / 2;
188
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                else if( segment >= NUM_SEGMENTS - width / 2 )
190
202
                else
191
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                        return;
192
204
                break;
193
 
        case Text::MODE_BOTTOM:
 
205
        case MODE_BOTTOM:
194
206
                if( segment > ( NUM_SEGMENTS - width ) / 2 &&
195
207
                        segment < ( NUM_SEGMENTS - width ) / 2 + width )
196
208
                {
203
215
 
204
216
        // render
205
217
        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
 
 
 
218
                _messages[ message_num ], _message_lens[ message_num ],
 
219
                (long)segment + _message_params[ message_num ],
 
220
                ( _message_modes[ message_num ] & 1 ) == 0, 0,
 
221
                _message_scale[ message_num ] );
 
222
}