/elec/propeller-clock

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  • Committer: Tim Marston
  • Date: 2012-03-09 23:42:20 UTC
  • Revision ID: tim@ed.am-20120309234220-xr1vxzve0o5n2oss
added support for eclipse project and converted to a manual Makefile

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src/text.cc
 
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/*
 
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 * text.cc
 
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 *
 
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 * Copyright (C) 2011 Tim Marston <tim@ed.am> and Dan Marston.
 
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 *
 
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 * This file is part of propeller-clock (hereafter referred to as "this
 
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 * program"). See http://ed.am/dev/software/arduino/propeller-clock for more
 
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 * information.
 
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 *
 
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 * This program is free software: you can redistribute it and/or modify
 
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 * it under the terms of the GNU Lesser General Public License as published
 
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 * by the Free Software Foundation, either version 3 of the License, or
 
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 * (at your option) any later version.
 
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 *
 
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 * This program is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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 * GNU Lesser General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU Lesser General Public License
 
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 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
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 */
 
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#include "text.h"
 
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#include "text_renderer.h"
 
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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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// the buffer for the message
 
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char Text::_messages[ NUM_MESSAGE_BUFFERS ][ MESSAGE_BUFFER_LEN ];
 
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// message buffer lengths
 
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static int _message_lens[ NUM_MESSAGE_BUFFERS ];
 
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// the mode that each message represents
 
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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_params[ NUM_MESSAGE_BUFFERS ];
 
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// time last frame
 
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static unsigned long _last_millis;
 
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// duration last frame (in case we can't calculate it this frame!)
 
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static unsigned long _duration;
 
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// recalculate message params, based on _duration
 
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static bool _do_draw_reset;
 
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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 ] & 0x1c )
 
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                {
 
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                case Text::MODE_ONEQUARTER:
 
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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_params[ message_num ] = -NUM_SEGMENTS / 3; break;
 
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                case Text::MODE_HALF:
 
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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_params[ message_num ] = -NUM_SEGMENTS * 2 / 3; break;
 
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                case Text::MODE_THREEQUARTERS:
 
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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_params[ message_num ] = -NUM_SEGMENTS; break;
 
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                }
 
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        }
 
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        else
 
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        {
 
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                switch( _message_modes[ message_num ] & 0x1c )
 
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                {
 
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                case Text::MODE_ONEQUARTER:
 
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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_params[ message_num ] = NUM_SEGMENTS / 3; break;
 
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                case Text::MODE_HALF:
 
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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_params[ message_num ] = NUM_SEGMENTS * 2 / 3; break;
 
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                case Text::MODE_THREEQUARTERS:
 
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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_params[ message_num ] = NUM_SEGMENTS; break;
 
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                }
 
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                _message_params[ message_num ] = -( _message_params[ message_num ] -
 
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                        TextRenderer::get_width( _message_lens[ message_num ] ) ) / 2;
 
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        }
 
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}
 
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void Text::set_message( int message_num, PString &pstring )
 
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{
 
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        // update message
 
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        _message_lens[ message_num ] = pstring.length();
 
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}
 
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void Text::reset_message( int message_num, char mode )
 
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{
 
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        _message_modes[ message_num ] = mode;
 
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        reset_message_param( message_num );
 
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}
 
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void Text::reset()
 
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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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        // reset the text renderer's output buffer
 
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        TextRenderer::reset_buffer();
 
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}
 
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void Text::draw_reset()
 
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{
 
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        // how many milliseconds have elapsed since last frame?
 
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        unsigned long millis = ::millis();
 
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        if( millis > _last_millis )
 
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                _duration = millis - _last_millis;
 
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        _last_millis = millis;
 
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        _do_draw_reset = true;
 
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}
 
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void Text::draw( int message_num, 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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                if( _message_modes[ message_num ] & MODE_HSCROLL )
 
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                {
 
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                        // add to horizontal scroll position
 
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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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                        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 ] & 0x1c )
 
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        {
 
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        case MODE_ONEQUARTER:
 
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                width = NUM_SEGMENTS / 4;
 
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                break;
 
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        case MODE_ONETHIRD:
 
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                width = NUM_SEGMENTS / 3;
 
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                break;
 
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        case MODE_HALF:
 
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                width = NUM_SEGMENTS / 2;
 
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                break;
 
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        case MODE_TWOTHIRDS:
 
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                width = NUM_SEGMENTS * 2 / 3;
 
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                break;
 
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        case MODE_THREEQUARTERS:
 
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                width = NUM_SEGMENTS * 3 / 4;
 
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                break;
 
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        case MODE_ALL:
 
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                width = NUM_SEGMENTS;
 
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                break;
 
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        }
 
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        // convert segment to display-space
 
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        switch( _message_modes[ message_num ] & 0x03 )
 
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        {
 
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        case MODE_TOP:
 
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                if( segment < width / 2 )
 
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                        segment += width / 2;
 
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                else if( segment >= NUM_SEGMENTS - width / 2 )
 
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                        segment -= ( NUM_SEGMENTS - width / 2 );
 
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                else
 
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                        return;
 
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                break;
 
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        case MODE_BOTTOM:
 
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                if( segment > ( NUM_SEGMENTS - width ) / 2 &&
 
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                        segment < ( NUM_SEGMENTS - width ) / 2 + width )
 
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                {
 
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                        segment = width - ( segment - ( NUM_SEGMENTS - width ) / 2 );
 
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                }               
 
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                else
 
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                        return;
 
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                break;
 
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        }
 
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        // render
 
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        TextRenderer::render(
 
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                _messages[ message_num ], _message_lens[ message_num ],
 
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                (long)segment + _message_params[ message_num ],
 
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                ( _message_modes[ message_num ] & 1 ) == 0, 0 );
 
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}