/elec/propeller-clock

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Viewing changes to src/text.cc

  • Committer: Tim Marston
  • Date: 2012-05-18 18:29:50 UTC
  • Revision ID: tim@ed.am-20120518182950-t85bn9a21n72uzm8
text messages are now individually enabled and draw()n automatically

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src/text.cc
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static char _message_modes[ NUM_MESSAGE_BUFFERS ];
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// mode-specific message parameters
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static signed long _message_pos[ NUM_MESSAGE_BUFFERS ];
 
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static signed long _message_params[ NUM_MESSAGE_BUFFERS ];
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// text scaling factors
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static char _message_scale[ NUM_MESSAGE_BUFFERS ];
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#define MASK_MODE_SIZE 0x07
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#define MASK_MODE_POS 0x40
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void reset_message_pos( int message_num )
 
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void reset_message_param( int message_num )
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{
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        if( _message_modes[ message_num ] & Text::MODE_HSCROLL )
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        {
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                switch( _message_modes[ message_num ] & MASK_MODE_SIZE )
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                {
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                case Text::MODE_ONEQUARTER:
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                        _message_pos[ message_num ] = -NUM_SEGMENTS / 4; break;
 
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                        _message_params[ 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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                        _message_params[ 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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                        _message_params[ 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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                        _message_params[ message_num ] = -NUM_SEGMENTS * 2 / 3; break;
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                case Text::MODE_THREEQUARTERS:
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                        _message_pos[ message_num ] = -NUM_SEGMENTS * 3 / 4; break;
 
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                        _message_params[ message_num ] = -NUM_SEGMENTS * 3 / 4; break;
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                case Text::MODE_ALL:
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                        _message_pos[ message_num ] = -NUM_SEGMENTS; break;
 
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                        _message_params[ message_num ] = -NUM_SEGMENTS; break;
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                }
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        }
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        else
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                switch( _message_modes[ message_num ] & MASK_MODE_SIZE )
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                {
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                case Text::MODE_ONEQUARTER:
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                        _message_pos[ message_num ] = NUM_SEGMENTS / 4; break;
 
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                        _message_params[ 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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                        _message_params[ 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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                        _message_params[ 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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                        _message_params[ message_num ] = NUM_SEGMENTS * 2 / 3; break;
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                case Text::MODE_THREEQUARTERS:
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                        _message_pos[ message_num ] = NUM_SEGMENTS * 3 / 4; break;
 
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                        _message_params[ message_num ] = NUM_SEGMENTS * 3 / 4; break;
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                case Text::MODE_ALL:
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                        _message_pos[ message_num ] = NUM_SEGMENTS; break;
 
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                        _message_params[ message_num ] = NUM_SEGMENTS; break;
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                }
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                _message_pos[ message_num ] = -( _message_pos[ message_num ] -
 
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                _message_params[ message_num ] = -( _message_params[ message_num ] -
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                        TextRenderer::get_width( _message_lens[ message_num ],
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                                        _message_scale[ message_num ] ) ) / 2;
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        }
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        // reset renderer
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        _duration = 0;
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        _last_millis = ::millis();
 
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        _do_draw_reset = false;
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        // clear all message modes (disable messages)
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        for( int a = 0; a < NUM_MESSAGE_BUFFERS; a++ )
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{
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        _message_modes[ message_num ] = mode;
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        _message_scale[ message_num ] = scale;
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        // horizontal scrolling messages need their position reset at start of mode
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        if( _message_modes[ message_num ] & MODE_HSCROLL )
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                reset_message_pos( message_num );
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}
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{
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        // update message
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        _message_lens[ message_num ] = pstring.length();
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        // non-horizontal scrolling modes need their position reset whenever the
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        // text changes
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        if( !( _message_modes[ message_num ] & MODE_HSCROLL ) )
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                reset_message_pos( message_num );
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}
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                _duration = millis - _last_millis;
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        _last_millis = millis;
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        // 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;
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}
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{
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        TextRenderer::buffer_in_use();
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        // perform a mid-frame reset, as necessary
 
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        if( _do_draw_reset ) // && segment > NUM_SEGMENTS / 2 )
 
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        {
 
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                // reset message param
 
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                reset_message_param( message_num );
 
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                // add to horizontal scroll position
 
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                if( _message_modes[ message_num ] & Text::MODE_HSCROLL ) {
 
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                        _message_params[ message_num ] +=
 
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                                _duration * TEXT_SCROLL_SPEED / 1000;
 
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                        long excess = _message_params[ message_num ] -
 
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                                TextRenderer::get_width( _message_lens[ message_num ],
 
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                                                _message_scale[ message_num ] );
 
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                        if( excess >= 0 ) {
 
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                                reset_message_param( message_num );
 
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                                _message_params[ message_num ] += excess;
 
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                        }
 
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                }
 
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        }
 
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        // calculate the width
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        int width;
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        switch( _message_modes[ message_num ] & MASK_MODE_SIZE )
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        // render
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        TextRenderer::render(
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                Text::_messages[ message_num ], _message_lens[ message_num ],
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                (long)segment + _message_pos[ message_num ],
 
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                (long)segment + _message_params[ message_num ],
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                ( _message_modes[ message_num ] & MASK_MODE_POS ) == Text::MODE_BOTTOM,
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                0, _message_scale[ message_num ] );
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}
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void Text::draw( int segment )
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{
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        // perform a mid-frame reset, as necessary
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        if( _do_draw_reset && segment == NUM_SEGMENTS / 2 ) {
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                _do_draw_reset = false;
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                // go through the messages looking for an active one
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                for( int a = 0; a < NUM_MESSAGE_BUFFERS; a++ )
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                        if( _message_modes[ a ] & MASK_MODE_SIZE )
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                        {
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                                // add to horizontal scroll position
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                                if( _message_modes[ a ] & Text::MODE_HSCROLL ) {
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                                        _message_pos[ a ] +=
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                                                        _duration * TEXT_SCROLL_SPEED / 1000;
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                                        long excess = _message_pos[ a ] -
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                                                        TextRenderer::get_width( _message_lens[ a ],
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                                                                        _message_scale[ a ] );
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                                        if( excess >= 0 ) {
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                                                reset_message_pos( a );
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                                                _message_pos[ a ] += excess;
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                                        }
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                                }
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                        }
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        }
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        // draw any active messages
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        for( int a = 0; a < NUM_MESSAGE_BUFFERS; a++ )
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                if( _message_modes[ a ] & MASK_MODE_SIZE )
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                        draw_message( a, segment );
 
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        // turn off any requested draw reset after all messages are drawn
 
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        _do_draw_reset = false;
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}
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