lcd-recorder.c

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    ny += shift;

    /* Calculate bit masks */
    mask4 = ~(0xfe << ((ny-1) & 7));
    if (clear)
    {
        mask = ~(0xff << shift);
        mask2 = 0;
        mask3 = ~mask4;
        if (ny <= 8)
            mask3 |= mask;
    }
    else
        mask = mask2 = mask3 = 0xff;

    /* Loop for each column */
    for (x = 0; x < nx; x++)
    {
        dst = dst2;
        dst2++;
        data = 0;
        y = 0;

        if (ny > 8)
        {
            /* First partial row */
            data = *src++ << shift;
            *dst = (*dst & mask) | data;
            data >>= 8;
            dst += LCD_WIDTH;

            /* Intermediate rows */
            for (y = 8; y < ny-8; y += 8)
            {
                data |= *src++ << shift;
                *dst = (*dst & mask2) | data;
                data >>= 8;
                dst += LCD_WIDTH;
            }
        }

        /* Last partial row */
        if (y + shift < ny)
            data |= *src++ << shift;
        *dst = (*dst & mask3) | (data & mask4);
    }
}

/* 
 * Draw a rectangle with upper left corner at (x, y)
 * and size (nx, ny)
 */
void lcd_drawrect (int x, int y, int nx, int ny)
{
    int i;

    if (x > LCD_WIDTH)
        return;
    if (y > LCD_HEIGHT)
        return;

    if (x + nx > LCD_WIDTH)
        nx = LCD_WIDTH - x;
    if (y + ny > LCD_HEIGHT)
        ny = LCD_HEIGHT - y;

    /* vertical lines */
    for (i = 0; i < ny; i++) {
        DRAW_PIXEL(x, (y + i));
        DRAW_PIXEL((x + nx - 1), (y + i));
    }

    /* horizontal lines */
    for (i = 0; i < nx; i++) {
        DRAW_PIXEL((x + i),y);
        DRAW_PIXEL((x + i),(y + ny - 1));
    }
}

/*
 * Clear a rectangular area at (x, y), size (nx, ny)
 */
void lcd_clearrect (int x, int y, int nx, int ny)
{
    int i;
    for (i = 0; i < nx; i++)
        lcd_bitmap (zeros, x+i, y, 1, ny, true);
}

/*
 * Fill a rectangular area at (x, y), size (nx, ny)
 */
void lcd_fillrect (int x, int y, int nx, int ny)
{
    int i;
    for (i = 0; i < nx; i++)
        lcd_bitmap (ones, x+i, y, 1, ny, true);
}

/* Invert a rectangular area at (x, y), size (nx, ny) */
void lcd_invertrect (int x, int y, int nx, int ny)
{
    int i, j;

    if (x > LCD_WIDTH)
        return;
    if (y > LCD_HEIGHT)
        return;

    if (x + nx > LCD_WIDTH)
        nx = LCD_WIDTH - x;
    if (y + ny > LCD_HEIGHT)
        ny = LCD_HEIGHT - y;

    for (i = 0; i < nx; i++)
        for (j = 0; j < ny; j++)
            INVERT_PIXEL((x + i), (y + j));
}

/* Reverse the invert setting of the scrolling line (if any) at given char
   position.  Setting will go into affect next time line scrolls. */
void lcd_invertscroll(int x, int y)
{
    struct scrollinfo* s;
    int index;

    for ( index = 0; index < SCROLLABLE_LINES; index++ ) {
        /* is this a scrolling line? */
        if ( !(scrolling_lines&(1<<index)) )
            continue;
        
        s = &scroll[index];

        if (s->startx == x && s->starty == y)
        {
            /* Found the line */
            s->invert = !s->invert;
            break;
        }
    }
}

void lcd_drawline( int x1, int y1, int x2, int y2 )
{
    int numpixels;
    int i;
    int deltax, deltay;
    int d, dinc1, dinc2;
    int x, xinc1, xinc2;
    int y, yinc1, yinc2;

    deltax = abs(x2 - x1);
    deltay = abs(y2 - y1);

    if(deltax >= deltay)
    {
        numpixels = deltax;
        d = 2 * deltay - deltax;
        dinc1 = deltay * 2;
        dinc2 = (deltay - deltax) * 2;
        xinc1 = 1;
        xinc2 = 1;
        yinc1 = 0;
        yinc2 = 1;
    }
    else
    {
        numpixels = deltay;
        d = 2 * deltax - deltay;
        dinc1 = deltax * 2;
        dinc2 = (deltax - deltay) * 2;
        xinc1 = 0;
        xinc2 = 1;
        yinc1 = 1;
        yinc2 = 1;
    }
    numpixels++; /* include endpoints */

    if(x1 > x2)
    {
        xinc1 = -xinc1;
        xinc2 = -xinc2;
    }

    if(y1 > y2)
    {
        yinc1 = -yinc1;
        yinc2 = -yinc2;
    }

    x = x1;
    y = y1;

    for(i=0; i<numpixels; i++)
    {
        DRAW_PIXEL(x,y);

        if(d < 0)
        {
            d += dinc1;
            x += xinc1;
            y += yinc1;
        }
        else
        {
            d += dinc2;
            x += xinc2;
            y += yinc2;
        }
    }
}

void lcd_clearline( int x1, int y1, int x2, int y2 )
{
    int numpixels;
    int i;
    int deltax, deltay;
    int d, dinc1, dinc2;
    int x, xinc1, xinc2;
    int y, yinc1, yinc2;

    deltax = abs(x2 - x1);
    deltay = abs(y2 - y1);

    if(deltax >= deltay)
    {
        numpixels = deltax;
        d = 2 * deltay - deltax;
        dinc1 = deltay * 2;
        dinc2 = (deltay - deltax) * 2;
        xinc1 = 1;
        xinc2 = 1;
        yinc1 = 0;
        yinc2 = 1;
    }
    else
    {
        numpixels = deltay;
        d = 2 * deltax - deltay;
        dinc1 = deltax * 2;
        dinc2 = (deltax - deltay) * 2;
        xinc1 = 0;
        xinc2 = 1;
        yinc1 = 1;
        yinc2 = 1;
    }
    numpixels++; /* include endpoints */

    if(x1 > x2)
    {
        xinc1 = -xinc1;
        xinc2 = -xinc2;
    }

    if(y1 > y2)
    {
        yinc1 = -yinc1;
        yinc2 = -yinc2;
    }

    x = x1;
    y = y1;

    for(i=0; i<numpixels; i++)
    {
        CLEAR_PIXEL(x,y);

        if(d < 0)
        {
            d += dinc1;
            x += xinc1;
            y += yinc1;
        }
        else
        {
            d += dinc2;
            x += xinc2;
            y += yinc2;
        }
    }
}

/*
 * Set a single pixel
 */
void lcd_drawpixel(int x, int y)
{
    DRAW_PIXEL(x,y);
}

/*
 * Clear a single pixel
 */
void lcd_clearpixel(int x, int y)
{
    CLEAR_PIXEL(x,y);
}

/*
 * Invert a single pixel
 */
void lcd_invertpixel(int x, int y)
{
    INVERT_PIXEL(x,y);
}

void lcd_puts_scroll(int x, int y, unsigned char *string)
{
    lcd_puts_scroll_style(x, y, string, STYLE_DEFAULT);
}

void lcd_puts_scroll_style(int x, int y, unsigned char *string, int style)
{
    struct scrollinfo* s;
    int w, h;
    int index;
    int free_index=0;

    DEBUGF("puts_scroll_style: %s\n", string);
    
    for (index = 0; index < SCROLLABLE_LINES; index++) {
        s = &scroll[index];

        if (scrolling_lines&(1<<index)) {
            if (s->starty == y) {
                /* we prefer to re-use an existing index with the
                   same y-position */
                free_index=index;
                break;
            }
        }
        else {
            /* remember the last unused one */
            free_index=index;
        }
    }
    index=free_index;
    s = &scroll[index]; /* get the proper 's' */
    s->start_tick = current_tick + scroll_delay;
    s->invert = false;
    if (style & STYLE_INVERT) {
        s->invert = true;
        lcd_puts_style(x,y,string,STYLE_INVERT);
    }
    else
        lcd_puts(x,y,string);

    lcd_getstringsize(string, &w, &h);

    if (LCD_WIDTH - x * 8 - xmargin < w) {
        /* prepare scroll line */
        char *end;

        memset(s->line, 0, sizeof s->line);
        strcpy(s->line, string);

        /* get width */
        s->width = lcd_getstringsize(s->line, &w, &h);

        /* scroll bidirectional or forward only depending on the string
           width */
        if ( bidir_limit ) {
            s->bidir = s->width < (LCD_WIDTH - xmargin) *
                (100 + bidir_limit) / 100;
        }
        else
            s->bidir = false;

        if (!s->bidir) { /* add spaces if scrolling in the round */
            strcat(s->line, "   ");
            /* get new width incl. spaces */
            s->width = lcd_getstringsize(s->line, &w, &h);
        }

        end = strchr(s->line, '\0');
        strncpy(end, string, LCD_WIDTH/2);

        s->len = strlen(string);
        s->offset = 0;
        s->startx = x;
        s->starty = y;
        s->backward = false;
        scrolling_lines |= (1<<index);
    }
    else
        /* force a bit switch-off since it doesn't scroll */
        scrolling_lines &= ~(1<<index);
}

void lcd_stop_scroll(void)
{
    scrolling_lines=0;
}

void lcd_scroll_speed(int speed)
{
    scroll_speed = speed;
}

void lcd_scroll_step(int step)
{
    scroll_step = step;
}

void lcd_scroll_delay(int ms)
{
    scroll_delay = ms / (HZ / 10);
}

void lcd_bidir_scroll(int percent)
{
    bidir_limit = percent;
}
static void scroll_thread(void)
{
    struct font* pf;
    struct scrollinfo* s;
    int index;
    int xpos, ypos;

    /* initialize scroll struct array */
    scrolling_lines = 0;

    while ( 1 ) {
        for ( index = 0; index < SCROLLABLE_LINES; index++ ) {
            /* really scroll? */
            if ( !(scrolling_lines&(1<<index)) )
                continue;

            s = &scroll[index];

            /* check pause */
            if (TIME_BEFORE(current_tick, s->start_tick))
                continue;

            if (s->backward)
                s->offset -= scroll_step;
            else
                s->offset += scroll_step;

            pf = font_get(curfont);
            xpos = xmargin + s->startx * s->width / s->len;
            ypos = ymargin + s->starty * pf->height;

            if (s->bidir) { /* scroll bidirectional */
                if (s->offset <= 0) {
                    /* at beginning of line */
                    s->offset = 0;
                    s->backward = false;
                    s->start_tick = current_tick + scroll_delay * 2;
                }
                if (s->offset >= s->width - (LCD_WIDTH - xpos)) {
                    /* at end of line */
                    s->offset = s->width - (LCD_WIDTH - xpos);
                    s->backward = true;
                    s->start_tick = current_tick + scroll_delay * 2;
                }
            }
            else {
                /* scroll forward the whole time */
                if (s->offset >= s->width)
                    s->offset %= s->width;
            }

            lcd_clearrect(xpos, ypos, LCD_WIDTH - xpos, pf->height);
            lcd_putsxyofs(xpos, ypos, s->offset, s->line);
            if (s->invert)
                lcd_invertrect(xpos, ypos, LCD_WIDTH - xpos, pf->height);
            lcd_update_rect(xpos, ypos, LCD_WIDTH - xpos, pf->height);
        }

        sleep(HZ/scroll_speed);
    }
}

#endif