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Bernhard Walle  committed 0b0019f

Add lcdproc patch

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File lcdproc/lcdproc-add-serdisplib

+[PATCH] Add serdisplib driver
+
+This patch adds a serdisplib driver for the serdisplib library
+(http://serdisplib.sf.net) that is used for low-level accessing of dot-matrix
+devices (i.e. such displays that are drived by pixel and not by characters
+unlike HD44780, for example).
+
+I know there's already glcdlib. But that approach has several disadvantages:
+
+  o Unnecessary library dependencies.
+  o Complicated installation, i.e. you have to edit two configuration files.
+  o Too much redraws. In fact, that was the reason for me to write this
+    driver because my ctinclud display (http://www.ct-maeusekino.de) was quite
+    unusable with the glcdlib driver. The problem is simply that lcdproc
+    redraws the whole screen each second and it's the task of the driver
+    to not to redraw it in reality. The problem is now that the glcdproc
+    driver only has the view of characters, and cannot decide which pixels it
+    actually has to redraw. And graphlcd which has the per-pixel view doesn't
+    do that "caching" and simply redraws all. Of course, that _can_
+    be changed in graphlcd, but I'm sure that leads to endless discussions and
+    because I didn't like the glcdlib -> graphlcd -> serdisplib approach
+    anyway, I decided to write that driver.
+
+Some important design decisions:
+
+ o The driver is split into lcdgraphic.c and serdisplib.c. All function that
+   do the character -> pixel "rendering" are split out into lcdgraphic.c,
+   so it would be possible to write another low-level driver that uses that
+   function. However, in normal cases it makes more sense to add that part to
+   serdisplib.
+ o It only requires FreeType (http://freetype.sf.net) for font rendering.
+   That's no new real dependency because in almost all cases, graphlcd was
+   compiled with FreeType support.
+ o Only mono space fonts are supported.
+ o The driver implements symbols (arrow, etc.) using Unicode characters of the
+   font. (The recommended font is Andale Mono which is available for free
+   from http://corefonts.sf.net)
+ o Works on i686 and x86_64.
+
+Please review. The patch is against 0.5.2. If you consider to add this into
+CVS, I'll provide documentation. And this time, I'll provide the documentation
+in time unlike with the ula200 driver. ;-)
+
+
+Signed-off-by: Bernhard Walle <bernhard.walle@gmx.de>
+
+---
+ LCDd.conf                   |   28 ++
+ acinclude.m4                |   27 +-
+ server/drivers/Makefile.am  |    5 
+ server/drivers/lcdgraphic.c |  590 ++++++++++++++++++++++++++++++++++++++++++++
+ server/drivers/lcdgraphic.h |  195 ++++++++++++++
+ server/drivers/serdisplib.c |  379 ++++++++++++++++++++++++++++
+ 6 files changed, 1220 insertions(+), 4 deletions(-)
+
+--- a/acinclude.m4
++++ b/acinclude.m4
+@@ -10,13 +10,13 @@
+ 	[                    irman,joy,lb216,lcdm001,lcterm,lirc,MD8800,ms6931,]
+ 	[                    mtc_s16209x,MtxOrb,NoritakeVFD,picolcd,pyramid,sed1330]
+ 	[                    sed1520,serialPOS,serialVFD,sli,stv5730,svga,t6963,text,]
+-	[                    tyan,ula200,xosd]
++	[                    tyan,ula200,serdisplib,xosd]
+ 	[                  'all' compiles all drivers;]
+ 	[                  'all,!xxx,!yyy' de-selects previously selected drivers],
+ 	drivers="$enableval",
+ 	drivers=[bayrad,CFontz,CFontz633,curses,CwLnx,glk,lb216,lcdm001,MtxOrb,pyramid,text])
+ 
+-allDrivers=[bayrad,CFontz,CFontz633,CFontzPacket,curses,CwLnx,ea65,EyeboxOne,g15,glcdlib,glk,hd44780,icp_a106,imon,IOWarrior,irman,joy,lb216,lcdm001,lcterm,lirc,MD8800,ms6931,mtc_s16209x,MtxOrb,NoritakeVFD,picolcd,pyramid,sed1330,sed1520,serialPOS,serialVFD,sli,stv5730,svga,t6963,text,tyan,ula200,xosd]
++allDrivers=[bayrad,CFontz,CFontz633,CFontzPacket,curses,CwLnx,ea65,EyeboxOne,g15,glcdlib,glk,hd44780,icp_a106,imon,IOWarrior,irman,joy,lb216,lcdm001,lcterm,lirc,MD8800,ms6931,mtc_s16209x,MtxOrb,NoritakeVFD,picolcd,pyramid,sed1330,sed1520,serialPOS,serialVFD,sli,stv5730,svga,t6963,text,tyan,ula200,serdisplib,xosd]
+ 
+ drivers=`echo $drivers | sed -e 's/,/ /g'`
+ 
+@@ -383,6 +383,29 @@
+ 				AC_MSG_WARN([The ula200 driver needs ftdi.h and usb.h])
+ 			])
+ 			;;
++                serdisplib)
++                        LIBFREETYPE_CFLAGS=`pkg-config --cflags freetype2`
++                        LIBFREETYPE_LIBS=`pkg-config --libs freetype2`
++                        if test x"$LIBFREETYPE_CFLAGS" = "x" ; then
++                                AC_MSG_WARN([The serdisplib driver needs freetype2])
++                        fi
++
++                        AC_CHECK_HEADERS([serdisplib/serdisp.h],[
++                                AC_CHECK_LIB(serdisp, serdisp_nextdisplaydescription,[
++                                        LIBSERDISP="-lserdisp"
++                                        DRIVERS="$DRIVERS serdisplib${SO}"
++                                        actdrivers=["$actdrivers serdisplib"]
++                                ],[
++                                        AC_MSG_WARN([The serdisplib driver needs serdisplib])
++                                ])
++                        ],[
++                                AC_MSG_WARN([The serdisplib driver needs serdislib/serdisp.h])
++                        ])
++
++                        AC_SUBST(LIBFREETYPE_CFLAGS)
++                        AC_SUBST(LIBFREETYPE_LIBS)
++                        AC_SUBST(LIBSERDISP)
++                        ;;
+ 		xosd)
+ 			AC_CHECK_HEADERS([xosd.h],[
+ 				AC_CHECK_LIB(xosd, main,[
+--- a/server/drivers/Makefile.am
++++ b/server/drivers/Makefile.am
+@@ -19,12 +19,13 @@
+ #LIBS =
+ 
+ pkglib_PROGRAMS = @DRIVERS@
+-EXTRA_PROGRAMS = bayrad CFontz CFontz633 CFontzPacket curses CwLnx ea65 EyeboxOne g15 glcdlib glk hd44780 icp_a106 imon IOWarrior irman joy lb216 lcdm001 lcterm lirc MD8800 ms6931 mtc_s16209x MtxOrb NoritakeVFD picolcd pyramid sed1330 sed1520 serialPOS serialVFD stv5730 svga t6963 text tyan sli ula200 xosd
++EXTRA_PROGRAMS = bayrad CFontz CFontz633 CFontzPacket curses CwLnx ea65 EyeboxOne g15 glcdlib glk hd44780 icp_a106 imon IOWarrior irman joy lb216 lcdm001 lcterm lirc MD8800 ms6931 mtc_s16209x MtxOrb NoritakeVFD picolcd pyramid sed1330 sed1520 serialPOS serialVFD stv5730 svga t6963 text tyan sli ula200 serdisplib xosd
+ noinst_LIBRARIES = libLCD.a libbignum.a
+ 
+ IOWarrior_CFLAGS =   @libusb_cflags@ $(AM_CFLAGS)
+ hd44780_CFLAGS =     @libusb_cflags@ $(AM_CFLAGS)
+ g15_CFLAGS =         @libusb_cflags@ $(AM_CFLAGS)
++serdisplib_CFLAGS =  @LIBFREETYPE_CFLAGS@ $(AM_CFLAGS)
+ 
+ CFontz_LDADD =       libLCD.a libbignum.a
+ CFontz633_LDADD =    libLCD.a libbignum.a
+@@ -53,6 +54,7 @@
+ t6963_LDADD =        libLCD.a
+ tyan_LDADD =         libLCD.a libbignum.a
+ ula200_LDADD =       libLCD.a @LIBFTDI@
++serdisplib_LDADD =   libLCD.a @LIBSERDISP@ @LIBFREETYPE_LIBS@
+ sli_LDADD =          libLCD.a
+ xosd_LDADD =         @LIBXOSD@
+ 
+@@ -99,6 +101,7 @@
+ text_SOURCES =       lcd.h text.h text.c report.h
+ tyan_SOURCES =       lcd.h lcd_lib.h tyan_lcdm.h tyan_lcdm.c report.h adv_bignum.h
+ ula200_SOURCES =     lcd.h lcd_lib.h ula200.h ula200.c report.h
++serdisplib_SOURCES = lcd.h serdisplib.h serdisplib.c lcdgraphic.c lcdgraphic.h
+ sli_SOURCES =        lcd.h lcd_lib.h wirz-sli.h wirz-sli.c report.h
+ xosd_SOURCES =       lcd.h xosdlib_drv.c xosdlib_drv.h report.h
+ 
+--- /dev/null
++++ b/server/drivers/lcdgraphic.c
+@@ -0,0 +1,590 @@
++// Description:
++
++/*  Copyright (C) 2007 Bernhard Walle <bernhard.walle@gmx.de>
++
++    This program is free software; you can redistribute it and/or modify
++    it under the terms of the GNU General Public License as published by
++    the Free Software Foundation; either version 2 of the License, or
++    any later version.
++
++    This program is distributed in the hope that it will be useful,
++    but WITHOUT ANY WARRANTY; without even the implied warranty of
++    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++    GNU General Public License for more details.
++
++    You should have received a copy of the GNU General Public License
++    along with this program; if not, write to the Free Software
++    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 */
++
++#include <stdlib.h>
++#include <stdio.h>
++#include <unistd.h>
++#include <termios.h>
++#include <fcntl.h>
++#include <string.h>
++#include <errno.h>
++#include <limits.h>
++#include <syslog.h>
++#include <stdint.h>
++
++#include "lcdgraphic.h"
++
++
++///////////////////////////////////////////////////////////////////////////////
++// Defines
++
++#undef report
++#define lcdgr_report    lcdgr->drv->report
++
++///////////////////////////////////////////////////////////////////////////////
++// Returns the value of a pixel in the new_buffer buffer.
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++// @param x         the x location of the pixel
++// @param y         the y location of the pixel
++//
++// @return the value of the pixel
++//
++static inline int get_pixel_new(struct lcdgraphic *lcdgr, int x, int y)
++{
++    if (x >= lcdgr->width || y >= lcdgr->height)
++        return -1;
++    else
++        return lcdgr->new_buffer[lcdgr->width * y + x];
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Returns the value of a pixel in the disp_buffer buffer.
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++// @param x         the x location of the pixel
++// @param y         the y location of the pixel
++//
++// @return the value of the pixel
++//
++static inline int get_pixel_disp(struct lcdgraphic *lcdgr, int x, int y)
++{
++    if (x >= lcdgr->width || y >= lcdgr->height)
++        return -1;
++    else
++        return lcdgr->disp_buffer[lcdgr->width * y + x];
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Sets the value of a pixel in the new_buffer buffer.
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++// @param x         the x location of the pixel
++// @param y         the y location of the pixel
++// @param value     the value to which the buffer should be set
++//
++static void set_pixel_new(struct lcdgraphic *lcdgr, int x, int y, int value)
++{
++    if (x < lcdgr->width && y < lcdgr->height)
++        lcdgr->new_buffer[lcdgr->width * y + x] = value;
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Sets the value of a pixel in the disp_buffer buffer.
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++// @param x         the x location of the pixel
++// @param y         the y location of the pixel
++// @param value     the value to which the buffer should be set
++//
++static void set_pixel_disp(struct lcdgraphic *lcdgr, int x, int y, int value)
++{
++    if (x < lcdgr->width && y < lcdgr->height)
++        lcdgr->disp_buffer[lcdgr->width * y + x] = value;
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Maps a lcdproc icon to a unicode code for an icon.
++//
++// @param icon      the lcdproc icon constant
++//
++// @return Unicode value
++//
++static int icon2unicode(int icon)
++{
++    switch (icon) {
++        case ICON_BLOCK_FILLED:
++            return UNICODE_BLOCK_FILLED;
++        case ICON_HEART_FILLED:
++            return UNICODE_HEART_FILLED;
++        case ICON_HEART_OPEN:
++            return UNICODE_HEART_OPEN;
++        case ICON_ARROW_UP:
++            return UNICODE_ARROW_UP;
++        case ICON_ARROW_DOWN:
++            return UNICODE_ARROW_DOWN;
++        case ICON_ARROW_LEFT:
++            return UNICODE_ARROW_LEFT;
++        case ICON_ARROW_RIGHT:
++            return UNICODE_ARROW_RIGHT;
++        case ICON_SELECTOR_AT_LEFT:
++            return UNICODE_SELECTOR_AT_LEFT;
++        case ICON_SELECTOR_AT_RIGHT:
++            return UNICODE_SELECTOR_AT_RIGHT;
++        case ICON_ELLIPSIS:
++            return UNICODE_ELLIPSIS;
++        default:
++            return -1;
++    }
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Initialises the instance
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure (not initialised,
++//                  only allocated
++// @param settings  a pointer to a settings structure, for a description of the
++//                  members, see above
++// @param functions a pointer to the functions structure, for a description of
++//                  the members, see above
++//
++// @return          0 on success, != 0 on failure
++//
++int lcdgraphic_init(struct lcdgraphic              *lcdgr,
++                    struct lcdgraphic_settings     *settings,
++                    struct lcdgraphic_functions    *functions)
++{
++    int ret;
++
++    // check the arguments
++    if (!lcdgr || !functions || !settings) {
++        lcdgr_report(RPT_ERR, "lcdgraphic_init: one of the arguments is NULL");
++        return -EINVAL;
++    }
++
++    // check functions
++    if (!functions->setpixel || !functions->clear || !functions->flush) {
++        lcdgr_report(RPT_ERR, "lcdgraphic_init: all functions must be valid");
++        return -EINVAL;
++    }
++
++    // validation
++    if (settings->cwidth == 0 || settings->cheight == 0) {
++        lcdgr_report(RPT_ERR, "lcdgraphic_init: cwidth / cheight is 0");
++        return -EINVAL;
++    }
++
++    // zero all first
++    memset(lcdgr, 0, sizeof(struct lcdgraphic));
++
++    // assign some members
++    lcdgr->width = settings->width;
++    lcdgr->height = settings->height;
++    lcdgr->cwidth = settings->cwidth;
++    lcdgr->cheight = settings->cheight;
++    lcdgr->bwidth = settings->bheight;
++    lcdgr->drv = settings->drv;
++    strncpy(lcdgr->normal_font, settings->normal_font, PATH_MAX);
++    lcdgr->normal_font[PATH_MAX-1] = 0;
++    lcdgr->funcs = *functions;
++    lcdgr->all_dirty = 1;
++
++    // calculate some stuff
++    lcdgr->num_pixels = lcdgr->width * lcdgr->height;
++    lcdgr->xchars = (lcdgr->width - 2*lcdgr->bwidth) / lcdgr->cwidth;
++    lcdgr->ychars = (lcdgr->height - 2*lcdgr->bheight) / lcdgr->cheight;
++
++    // initialise freetype
++    ret = FT_Init_FreeType(&lcdgr->ft_library);
++    if (ret != 0) {
++        lcdgr_report(RPT_ERR, "Freetype initialisation failed");
++        goto out;
++    }
++
++    // load the font face for freetype
++    ret = FT_New_Face(lcdgr->ft_library, lcdgr->normal_font, 0,
++            &lcdgr->ft_normal_font);
++    if (ret != 0) {
++        lcdgr_report(RPT_ERR, "Freetype creation of font '%s' failed",
++                lcdgr->normal_font);
++        goto out;
++    }
++
++    // allocate the buffers
++    lcdgr->disp_buffer = (int *)malloc(sizeof(int) * lcdgr->num_pixels);
++    if (!lcdgr->disp_buffer) {
++        lcdgr_report(RPT_ERR, "lcdgraphic_init: malloc of disp_buffer failed");
++        ret = -ENOMEM;
++        goto out;
++    }
++
++    lcdgr->new_buffer = (int *)malloc(sizeof(int) * lcdgr->num_pixels);
++    if (!lcdgr->new_buffer) {
++        lcdgr_report(RPT_ERR, "lcdgraphic_init: malloc of new_buffer failed");
++        ret = -ENOMEM;
++        goto out;
++    }
++
++    // clear buffers initially
++    memset(lcdgr->new_buffer, 0, sizeof(int) * lcdgr->num_pixels);
++    memset(lcdgr->disp_buffer, 0, sizeof(int) * lcdgr->num_pixels);
++
++    return 0;
++
++out:
++    if (lcdgr->ft_normal_font)
++        FT_Done_Face(lcdgr->ft_normal_font);
++    if (lcdgr->ft_library)
++        FT_Done_FreeType(lcdgr->ft_library);
++    if (lcdgr->new_buffer)
++        free(lcdgr->new_buffer);
++    if (lcdgr->disp_buffer)
++        free(lcdgr->disp_buffer);
++
++    return ret;
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Destroys the instance
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++//
++void lcdgraphic_destroy(struct lcdgraphic *lcdgr)
++{
++    if (!lcdgr) {
++        lcdgr_report(RPT_ERR, "lcdgraphic_destroy: lcdgr == NULL");
++        return;
++    }
++
++    if (lcdgr->ft_normal_font)
++        FT_Done_Face(lcdgr->ft_normal_font);
++    if (lcdgr->ft_library)
++        FT_Done_FreeType(lcdgr->ft_library);
++
++    free(lcdgr->disp_buffer);
++    free(lcdgr->new_buffer);
++
++    // allow multiple calls of that function
++    lcdgr->disp_buffer = NULL;
++    lcdgr->new_buffer = NULL;
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Returns the number of characters in one line. This function can be used
++// inside the width callback of the display driver.
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++//
++// @return the number of characters in a line
++//
++int lcdgraphic_width(struct lcdgraphic *lcdgr)
++{
++    if (!lcdgr) {
++        lcdgr_report(RPT_ERR, "lcdgraphic_destroy: lcdgr == NULL");
++        return -1;
++    }
++
++    return lcdgr->xchars;
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Returns the number of lines. This function can be used inside the height
++// callback of the display driver.
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++//
++// @return the number lines
++//
++int lcdgraphic_height(struct lcdgraphic *lcdgr)
++{
++    if (!lcdgr) {
++        lcdgr_report(RPT_ERR, "lcdgraphic_destroy: lcdgr == NULL");
++        return -1;
++    }
++
++    return lcdgr->ychars;
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Clears the buffer. Doesn't draw anything.
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++//
++void lcdgraphic_clear(struct lcdgraphic *lcdgr)
++{
++    if (!lcdgr) {
++        lcdgr_report(RPT_ERR, "lcdgraphic_destroy: lcdgr == NULL");
++        return;
++    }
++
++    memset(lcdgr->new_buffer, 0, sizeof(int) * lcdgr->num_pixels);
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Draws a string into the display buffer. This calls lcdgraphic_draw_char()
++// internally.
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++// @param x         the column (position in characters!) where the character
++//                  should be drawn
++// @param y         the line (position in characters!) where the character
++//                  should be drawn
++// @param str       the string that should be drawn
++//
++void lcdgraphic_draw_string(struct lcdgraphic *lcdgr, int x, int y, char *str)
++{
++    int i;
++    int num_chars = strlen(str);
++
++    // check string length
++    if (x + num_chars > lcdgr->xchars) {
++        lcdgr_report(RPT_WARNING, "lcdgraphic_draw_string: %dx%d - %s too long",
++                x, y, str);
++        return;
++    }
++
++    for (i = 0; i < num_chars; i++)
++        lcdgraphic_draw_char(lcdgr, x + i, y, str[i]);
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Draws a Unicode character into the display buffer.
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++// @param x         the column (position in characters!) where the character
++//                  should be drawn
++// @param y         the line (position in characters!) where the character
++//                  should be drawn
++// @param c         the character that should be drawn (unicode code)
++// @param scale     for big numbers -- the number of cells that the rendered
++//                  string should occupy
++// @param width     the width in characters
++//
++static int lcdgraphic_draw_char_unicode(struct lcdgraphic *lcdgr,
++                                        int               x,
++                                        int               y,
++                                        int               c,
++                                        int               scale,
++                                        int               width)
++{
++    static int      last_font_size = -1;
++    int             xoffset, yoffset; // in pixel
++    int             err;
++    FT_Bitmap       *bitmap;
++    unsigned char   *bitmap_buf;
++    int             col, row;
++    FT_GlyphSlot    glyph;
++    FT_Face         face;
++    int             cwidth, cheight;
++    int             font_size;
++
++    face = lcdgr->ft_normal_font;
++    xoffset = lcdgr->bwidth + x*lcdgr->cwidth;
++    yoffset = lcdgr->bheight + y*lcdgr->cheight;
++
++    // set the font size
++    font_size = lcdgr->cheight * scale;
++    if (last_font_size != font_size) {
++        err = FT_Set_Pixel_Sizes(lcdgr->ft_normal_font, font_size, font_size);
++        if (err != 0) {
++            lcdgr_report(RPT_ERR, "Failed to set pixel size (%dx%x)",
++                    lcdgr->cwidth * scale, lcdgr->cheight * scale);
++            return -1;
++        }
++
++        last_font_size = font_size;
++    }
++
++    // load the glyph and render it
++    err = FT_Load_Char(lcdgr->ft_normal_font, c,
++            FT_LOAD_RENDER | FT_LOAD_MONOCHROME);
++    if (err != 0) {
++        lcdgr_report(RPT_WARNING, "lcdgraphic_draw_char: loading char "
++                "'%c' (%d) failed", c, c);
++
++        return -1;
++    }
++
++    // clear the rectangle first
++    cwidth = lcdgr->cwidth * width;
++    cheight = lcdgr->cheight * scale;
++    for (col = 0; col < cwidth; col++)
++        for (row = 0; row < cheight; row++)
++            set_pixel_new(lcdgr, xoffset + col, yoffset + row, 0);
++
++    // set some data elements for convenience
++    glyph = lcdgr->ft_normal_font->glyph;
++    bitmap = &glyph->bitmap;
++    bitmap_buf = bitmap->buffer;
++
++    // and now copy the pixels
++    for (row = 0; row < bitmap->rows; row++) {
++        for (col = 0; col < bitmap->width; col++) {
++            int bitmap_left = glyph->bitmap_left;
++
++            if (scale != width)
++                bitmap_left = (cwidth - bitmap->width)/2;
++
++            set_pixel_new(lcdgr, xoffset + col + bitmap_left,
++                    yoffset + row + lcdgr->cheight + (face->size->metrics.descender >> 6)
++                    - glyph->bitmap_top,
++                    bitmap_buf[col/8] >> (7 - (col % 8)) & 1);
++        }
++        bitmap_buf += bitmap->pitch;
++    }
++
++    return 0;
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Draws a character into the display buffer.
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++// @param x         the column (position in characters!) where the character
++//                  should be drawn
++// @param y         the line (position in characters!) where the character
++//                  should be drawn
++// @param c         the character that should be drawn
++//
++void lcdgraphic_draw_char(struct lcdgraphic *lcdgr, int x, int y, char c)
++{
++    if (lcdgraphic_draw_char_unicode(lcdgr, x, y, c & 0xff, 1, 1) != 0)
++        lcdgraphic_draw_char_unicode(lcdgr, x, y, '?', 1, 1);
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Draws a big number into the display buffer.
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++// @param x         the x position
++// @param num       the actual number
++//
++void lcdgraphic_draw_num(struct lcdgraphic *lcdgr, int x, int num)
++{
++    int y;
++    const int BIG_HEIGHT = 3;
++
++    if (num < 0 || num > 10) {
++        lcdgr_report(RPT_WARNING, "lcdgraphic_draw_num: num out of range (%d)", num);
++        return;
++    }
++
++    y = lcdgr->ychars - (lcdgr->ychars - BIG_HEIGHT + 1)/2;
++    if (num == 10)
++        lcdgraphic_draw_char_unicode(lcdgr, x, y, ':', BIG_HEIGHT, 1);
++    else
++        lcdgraphic_draw_char_unicode(lcdgr, x, y, '0' + num, BIG_HEIGHT, BIG_HEIGHT);
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Draws an icon (which standard lcdproc icon syntax)
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++// @param x         the x position of the icon
++// @param y         the y position of the icon
++// @param icon      the icon constant
++//
++// @return 0 on success, -1 on failure (i.e. the core replaces the icon by a
++//         suitable character
++//
++int lcdgraphic_icon(struct lcdgraphic *lcdgr, int x, int y, int icon)
++{
++    int unicode;
++
++    unicode = icon2unicode(icon);
++    if (unicode > 0)
++        return lcdgraphic_draw_char_unicode(lcdgr, x, y, unicode, 1, 1);
++    else
++        return -1;
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Draws a horizontal bar
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++// @param x         the x position of the bar
++// @param y         the y position of the bar
++// @param len       the maximum length
++// @param promille  the current state
++// @param options
++//
++void lcdgraphic_hbar(struct lcdgraphic  *lcdgr,
++                     int                x,
++                     int                y,
++                     int                len,
++                     int                promille,
++                     int                options)
++{
++    int startx, midx, endx, starty, endy;
++    int col, row;
++
++    /* calculate positions */
++    startx = lcdgr->bwidth + x*lcdgr->cwidth;
++    midx   = startx + promille * (len*lcdgr->cwidth) / 1000;
++    endx   = startx + len*lcdgr->cwidth;
++    starty = lcdgr->bheight + y*lcdgr->cheight;
++    endy   = starty + lcdgr->cheight - 1;  /* don't draw the last line */
++
++    for (col = startx; col < endx; col++)
++        for (row = starty; row < endy; row++)
++                set_pixel_new(lcdgr, col, row, col < midx);
++}
++
++
++///////////////////////////////////////////////////////////////////////////////
++// Draws a vertical bar
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++// @param x         the x position of the bar
++// @param y         the y position of the bar
++// @param len       the maximum length
++// @param promille  the current state
++// @param options
++//
++void lcdgraphic_vbar(struct lcdgraphic  *lcdgr,
++                     int                x,
++                     int                y,
++                     int                len,
++                     int                promille,
++                     int                options)
++{
++    int startx, endx, starty, midy, endy;
++    int col, row;
++
++    /* calculation positions */
++    startx = lcdgr->bwidth + x*lcdgr->cwidth;
++    endx   = startx + lcdgr->cwidth - 1; /* don't draw the last column */
++    starty = lcdgr->bheight + (y + 1)*lcdgr->cheight - 1;
++    midy   = starty - promille * (len*lcdgr->cheight) / 1000;
++    endy   = starty - len*lcdgr->cheight;
++
++    for (col = startx; col < endx; col++)
++        for (row = starty; row > endy; row--)
++            set_pixel_new(lcdgr, col, row, row > midy);
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Flushes the output to the display. Uses the provided callback functions
++// of the underlying display.
++//
++// @param lcdgr     a pointer to a valid lcdgraphic structure
++//
++void lcdgraphic_flush(struct lcdgraphic *lcdgr)
++{
++    int x, y;
++
++    if (lcdgr->all_dirty)
++        lcdgr->funcs.clear(lcdgr->drv);
++
++    for (y = 0; y < lcdgr->height; y++) {
++        for (x = 0; x < lcdgr->width; x++) {
++            int val = get_pixel_new(lcdgr, x, y);
++
++            if (lcdgr->all_dirty ||
++                    (val != get_pixel_disp(lcdgr, x, y)) ) {
++                lcdgr->funcs.setpixel(lcdgr->drv, x, y, val);
++                set_pixel_disp(lcdgr, x, y, val);
++            }
++        }
++    }
++
++    lcdgr->funcs.flush(lcdgr->drv);
++    lcdgr->all_dirty = 0;
++}
++
++// vimx: set sw=4 ts=4 et:
+--- /dev/null
++++ b/server/drivers/lcdgraphic.h
+@@ -0,0 +1,195 @@
++// Description:
++
++/*  Copyright (C) 2007 Bernhard Walle <bernhard.walle@gmx.de>
++
++    This program is free software; you can redistribute it and/or modify
++    it under the terms of the GNU General Public License as published by
++    the Free Software Foundation; either version 2 of the License, or
++    any later version.
++
++    This program is distributed in the hope that it will be useful,
++    but WITHOUT ANY WARRANTY; without even the implied warranty of
++    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++    GNU General Public License for more details.
++
++    You should have received a copy of the GNU General Public License
++    along with this program; if not, write to the Free Software
++    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 */
++
++#ifndef LCDGRAPHIC_H
++#define LCDGRAPHIC_H
++
++#include <stdlib.h>
++#include <stdio.h>
++#include <unistd.h>
++#include <termios.h>
++#include <fcntl.h>
++#include <string.h>
++#include <errno.h>
++#include <syslog.h>
++#include <iconv.h>
++
++#ifdef HAVE_CONFIG_H
++# include "config.h"
++#endif
++
++#include <ft2build.h>
++#include FT_FREETYPE_H
++
++#include <serdisplib/serdisp.h>
++
++
++#include "lcd.h"
++#include "report.h"
++#include "timing.h"
++
++///////////////////////////////////////////////////////////////////////////////
++// constants
++//
++
++
++///////////////////////////////////////////////////////////////////////////////
++// Unicode characters
++//
++
++#define UNICODE_BLOCK_FILLED        0x2588
++#define UNICODE_HEART_OPEN		    0x2661
++#define UNICODE_HEART_FILLED	    0x2665
++#define UNICODE_ARROW_UP		    0x2191
++#define UNICODE_ARROW_DOWN  	    0x2193
++#define UNICODE_ARROW_LEFT  	    0x2190
++#define UNICODE_ARROW_RIGHT         0x2192
++#define UNICODE_CHECKBOX_OFF        -1          /* -1 == not implemented */
++#define UNICODE_CHECKBOX_ON         -1
++#define UNICODE_CHECKBOX_GRAY       -1
++#define UNICODE_SELECTOR_AT_LEFT    -1
++#define UNICODE_SELECTOR_AT_RIGHT   -1
++#define UNICODE_ELLIPSIS            -1
++
++///////////////////////////////////////////////////////////////////////////////
++// These are callback functions that the low level driver must provide
++//
++struct lcdgraphic_functions {
++
++    // sets the colour of a pixel
++    void (*setpixel)(Driver *drvthis, int x, int y, int pixel);
++
++    // clears the whole display
++    void (*clear)(Driver *drvthis);
++
++    // flushes the display
++    void (*flush)(Driver *drvthis);
++};
++
++
++///////////////////////////////////////////////////////////////////////////////
++// That structure should be passed by the user, while struct lcdgraphic is
++// entirely private to the library
++struct lcdgraphic_settings {
++
++    // the width and the height (in number of pixels) of the display
++	int width, height;
++
++    // the width and the height of one character
++    int cwidth, cheight;
++
++    // defines unused area on the display (border width / border height)
++    int bwidth, bheight;
++
++    // that's the cookie that is passed to the callback functions
++    // it's also used for reporting errors
++    Driver *drv;
++
++    // font file used for normal characters (TTF, must be monospaced)
++    char normal_font[PATH_MAX];
++};
++
++
++///////////////////////////////////////////////////////////////////////////////
++// Private structure for drivers that use the functions of that library.
++// Don't access the members by hand here.
++//
++struct lcdgraphic {
++
++    // --- public members from the structure above -----
++
++    // the width and the height (in number of pixels) of the display
++	int width, height;
++
++    // the width and the height of one character
++    int cwidth, cheight;
++
++    // defines unused area on the display (border width / border height)
++    int bwidth, bheight;
++
++    // that's the cookie that is passed to the callback functions
++    // it's also used for reporting errors
++    Driver *drv;
++
++    // font file used for normal characters (TTF, must be monospaced)
++    char normal_font[PATH_MAX];
++
++    // a set of callback functions
++    struct lcdgraphic_functions funcs;
++
++    // --- private members -----
++
++    // the framebuffer that's actually displayed
++    int *disp_buffer;
++
++    // the buffer that shows the contents of the next update but wasn't
++    // flushed yet
++    int *new_buffer;
++
++    // (calculated) convenience value because we need that often
++    int num_pixels;
++
++    // (calculated) number of characters in both directions
++    int xchars, ychars;
++
++    // all buffers are dirty, i.e. update all
++    int all_dirty;
++
++    // freetype library handle
++    FT_Library ft_library;
++
++    // handle for the normal font
++    FT_Face ft_normal_font;
++
++    // handle for charset convertions
++    iconv_t iconv_handle;
++};
++
++// Forward declarations for 'clients'
++
++int lcdgraphic_init(struct lcdgraphic              *lcdgr,
++                    struct lcdgraphic_settings     *settings,
++                    struct lcdgraphic_functions    *functions);
++
++int lcdgraphic_width(struct lcdgraphic *lcdgr);
++int lcdgraphic_height(struct lcdgraphic *lcdgr);
++void lcdgraphic_destroy(struct lcdgraphic *lcdgr);
++void lcdgraphic_clear(struct lcdgraphic *lcdgr);
++void lcdgraphic_flush(struct lcdgraphic *lcdgr);
++void lcdgraphic_draw_string(struct lcdgraphic *lcdgr, int x, int y, char *str);
++void lcdgraphic_draw_char(struct lcdgraphic *lcdgr, int x, int y, char c);
++void lcdgraphic_draw_num(struct lcdgraphic *lcdgr, int x, int num);
++int lcdgraphic_icon(struct lcdgraphic *lcdgr, int x, int y, int icon);
++
++void lcdgraphic_hbar(struct lcdgraphic  *lcdgr,
++                     int                x,
++                     int                y,
++                     int                len,
++                     int                promille,
++                     int                options);
++
++void lcdgraphic_vbar(struct lcdgraphic  *lcdgr,
++                     int                x,
++                     int                y,
++                     int                len,
++                     int                promille,
++                     int                options);
++
++#endif /* LCDGRAPHIC_H */
++
++// vim: set sw=4 ts=4 et:
+--- /dev/null
++++ b/server/drivers/serdisplib.c
+@@ -0,0 +1,379 @@
++// Description:
++
++/*  Copyright (C) 2007 Bernhard Walle <bernhard.walle@gmx.de>
++
++    This program is free software; you can redistribute it and/or modify
++    it under the terms of the GNU General Public License as published by
++    the Free Software Foundation; either version 2 of the License, or
++    any later version.
++
++    This program is distributed in the hope that it will be useful,
++    but WITHOUT ANY WARRANTY; without even the implied warranty of
++    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++    GNU General Public License for more details.
++
++    You should have received a copy of the GNU General Public License
++    along with this program; if not, write to the Free Software
++    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 */
++
++#include <stdlib.h>
++#include <stdio.h>
++#include <unistd.h>
++#include <termios.h>
++#include <fcntl.h>
++#include <string.h>
++#include <errno.h>
++#include <limits.h>
++#include <syslog.h>
++
++#include <serdisplib/serdisp.h>
++
++#ifdef HAVE_CONFIG_H
++# include "config.h"
++#endif
++
++#include "lcd.h"
++#include "report.h"
++#include "timing.h"
++#include "lcdgraphic.h"
++
++/* Vars for the server core */
++MODULE_EXPORT char *api_version = API_VERSION;
++MODULE_EXPORT int stay_in_foreground = 0;
++MODULE_EXPORT int supports_multiple = 1;
++MODULE_EXPORT char *symbol_prefix = "serdisplib_";
++
++///////////////////////////////////////////////////////////////////////////////
++// constants
++//
++#define SERDISPLIB_MAX_DISPLAYNAME      32
++#define SERDISPLIB_MAX_DEVICENAME       PATH_MAX
++
++///////////////////////////////////////////////////////////////////////////////
++// private data types
++//
++typedef struct {
++
++    // the name of the display driver in serdisplib, e.g. 'ctinclud'
++    char display_name[SERDISPLIB_MAX_DISPLAYNAME];
++
++    // the name of the device in serdisplib, e.g. /dev/parport0
++    char display_device[SERDISPLIB_MAX_DEVICENAME];
++
++    // the serdisplib connection handle
++    serdisp_CONN_t* serdisplib_conn;
++
++    // the serdisplib handle
++    serdisp_t *serdisplib;
++
++    // invert the display
++    int invert;
++
++    // the lcdgraphic handle
++    struct lcdgraphic *lcdgraphic;
++
++} PrivateData;
++
++
++
++///////////////////////////////////////////////////////////////////////////////
++// Callback functions
++//
++
++static void callback_setpixel(Driver *drvthis, int x, int y, int pixel)
++{
++	PrivateData *p = (PrivateData *) drvthis->private_data;
++
++    serdisp_setcolour(p->serdisplib, x, y, pixel ? SD_COL_BLACK : SD_COL_WHITE);
++}
++
++static void callback_clear(Driver *drvthis)
++{
++	PrivateData *p = (PrivateData *) drvthis->private_data;
++
++    serdisp_clearbuffer(p->serdisplib);
++}
++
++static void callback_flush(Driver *drvthis)
++{
++	PrivateData *p = (PrivateData *) drvthis->private_data;
++
++    serdisp_update(p->serdisplib);
++}
++
++struct lcdgraphic_functions lcdgraphic_functions = {
++    .setpixel       = callback_setpixel,
++    .clear          = callback_clear,
++    .flush          = callback_flush
++};
++
++///////////////////////////////////////////////////////////////////////////////
++// Init the driver and display
++//
++MODULE_EXPORT int
++serdisplib_init(Driver *drvthis)
++{
++    PrivateData *p;
++    int ret;
++    struct lcdgraphic_settings settings;
++    const char *s;
++
++    // Alocate and store private data
++    p = (PrivateData *) malloc(sizeof(PrivateData));
++    if (!p)
++        return -1;
++    if (drvthis->store_private_ptr(drvthis, p))
++        return -1;
++    memset(p, 0, sizeof(PrivateData));
++
++    // get the display name
++    s = drvthis->config_get_string(drvthis->name, "display_name", 0, NULL);
++    if (!s) {
++        report(RPT_ERR, "You must specify display_name in configuration");
++        goto out;
++    }
++    strncpy(p->display_name, s, SERDISPLIB_MAX_DISPLAYNAME);
++    p->display_name[SERDISPLIB_MAX_DISPLAYNAME-1] = 0;
++
++    // get the display device
++    s = drvthis->config_get_string(drvthis->name, "display_device", 0, NULL);
++    if (!s) {
++        report(RPT_ERR, "You must specify display_device in configuration");
++        goto out;
++    }
++    strncpy(p->display_device, s, SERDISPLIB_MAX_DEVICENAME);
++    p->display_device[SERDISPLIB_MAX_DEVICENAME-1] = 0;
++
++    // get the normal font
++    s = drvthis->config_get_string(drvthis->name, "normal_font", 0, NULL);
++    if (!s) {
++        report(RPT_ERR, "You must specify normal_font in configuration");
++        goto out;
++    }
++    strncpy(settings.normal_font, s, PATH_MAX);
++    settings.normal_font[PATH_MAX-1] = 0;
++
++    // character size
++    s = drvthis->config_get_string(drvthis->name, "char_size", 0, "6x10");
++    if (!s) {
++        report(RPT_ERR, "Could not retrieve char_size from configuration");
++        goto out;
++    }
++    if (sscanf(s, "%dx%d", &settings.cwidth, &settings.cheight) != 2) {
++        report(RPT_ERR, "Could not scan '%s' correctly", s);
++        goto out;
++    }
++
++    // border size
++    s = drvthis->config_get_string(drvthis->name, "border_size", 0, "0x0");
++    if (!s) {
++        report(RPT_ERR, "Could not retrieve border size from configuration");
++        goto out;
++    }
++    if (sscanf(s, "%dx%d", &settings.bwidth, &settings.bheight) != 2) {
++        report(RPT_ERR, "Could not scan '%s' correctly", s);
++        goto out;
++    }
++
++    // invert
++    p->invert = drvthis->config_get_bool(drvthis->name, "invert", 0, 1);
++
++
++    /* End of config file parsing */
++
++    // opening the output device */
++    p->serdisplib_conn = SDCONN_open(p->display_device);
++    if (!p->serdisplib_conn) {
++        report(RPT_ERR, "Could not open %s: %s", p->display_device,
++                sd_geterrormsg());
++        goto out;
++    }
++
++    // opening and initialising the display
++    p->serdisplib = serdisp_init(p->serdisplib_conn, p->display_name, "");
++    if (!p->serdisplib) {
++        report(RPT_ERR, "Error opening display %s: %s\n", p->display_name,
++                sd_geterrormsg());
++        goto out;
++    }
++
++    // invert settings
++    serdisp_setoption(p->serdisplib, "INVERT", p->invert
++            ? SD_OPTION_YES : SD_OPTION_NO);
++
++    // allocate lcdgraphic handle
++    p->lcdgraphic = (struct lcdgraphic *)malloc(sizeof(struct lcdgraphic));
++    if (!p->lcdgraphic) {
++        report(RPT_ERR, "Not enough memory to allocate struct lcdgraphic");
++        goto out;
++    }
++
++    // register at the lcdgraphic backend
++    settings.width = serdisp_getwidth(p->serdisplib);
++    settings.height = serdisp_getheight(p->serdisplib);
++    settings.drv = drvthis;
++
++    ret = lcdgraphic_init(p->lcdgraphic, &settings, &lcdgraphic_functions);
++    if (ret != 0) {
++        report(RPT_ERR, "Error registering at lcdgraphic subsystem");
++        goto out;
++    }
++
++    return 0;
++
++out:
++    if (p->serdisplib_conn && !p->serdisplib)
++        SDCONN_close(p->serdisplib_conn);
++    if (p->serdisplib)
++        serdisp_quit(p->serdisplib);
++    drvthis->store_private_ptr(drvthis, NULL);
++    free(p);
++
++    return -1;
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Clean-up
++//
++MODULE_EXPORT void
++serdisplib_close(Driver *drvthis)
++{
++	PrivateData *p = (PrivateData *) drvthis->private_data;
++
++    if (p) {
++        if (p->serdisplib)
++            serdisp_quit(p->serdisplib);
++        if (p->lcdgraphic)
++            lcdgraphic_destroy(p->lcdgraphic);
++    }
++    drvthis->store_private_ptr(drvthis, NULL);
++    free(p);
++}
++
++
++///////////////////////////////////////////////////////////////////////////////
++// Returns the display width
++//
++MODULE_EXPORT int
++serdisplib_width (Driver *drvthis)
++{
++	PrivateData *p = (PrivateData *) drvthis->private_data;
++
++    return lcdgraphic_width(p->lcdgraphic);
++}
++
++
++///////////////////////////////////////////////////////////////////////////////
++// Returns the display height
++//
++MODULE_EXPORT int
++serdisplib_height (Driver *drvthis)
++{
++	PrivateData *p = (PrivateData *) drvthis->private_data;
++
++    return lcdgraphic_height(p->lcdgraphic);
++}
++
++
++///////////////////////////////////////////////////////////////////////////////
++// Clear the framebuffer
++//
++MODULE_EXPORT void
++serdisplib_clear (Driver *drvthis)
++{
++	PrivateData *p = (PrivateData *) drvthis->private_data;
++
++    lcdgraphic_clear(p->lcdgraphic);
++}
++
++
++///////////////////////////////////////////////////////////////////////////////
++// Place a character in the framebuffer
++//
++MODULE_EXPORT void
++serdisplib_chr (Driver *drvthis, int x, int y, char ch)
++{
++	PrivateData *p = (PrivateData *) drvthis->private_data;
++
++    lcdgraphic_draw_char(p->lcdgraphic, x - 1, y - 1, ch);
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Place a string in the framebuffer
++//
++MODULE_EXPORT void
++serdisplib_string (Driver *drvthis, int x, int y, char *s)
++{
++	PrivateData *p = (PrivateData *) drvthis->private_data;
++
++    lcdgraphic_draw_string(p->lcdgraphic, x - 1, y - 1, s);
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Place a big number in the framebuffer
++//
++MODULE_EXPORT void
++serdisplib_num (Driver *drvthis, int x, int num)
++{
++	PrivateData *p = (PrivateData *) drvthis->private_data;
++
++    lcdgraphic_draw_num(p->lcdgraphic, x - 1, num);
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Sets the backlight on or off
++//
++MODULE_EXPORT void
++serdisplib_backlight (Driver *drvthis, int on)
++{
++	PrivateData *p = (PrivateData *) drvthis->private_data;
++
++    serdisp_setoption(p->serdisplib, "BACKLIGHT", on ? SD_OPTION_YES : SD_OPTION_NO);
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Flush the framebuffer to the display
++//
++MODULE_EXPORT void
++serdisplib_flush(Driver *drvthis)
++{
++	PrivateData *p = (PrivateData *) drvthis->private_data;
++
++    lcdgraphic_flush(p->lcdgraphic);
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Set default icon into a userdef char
++//
++MODULE_EXPORT int
++serdisplib_icon(Driver *drvthis, int x, int y, int icon)
++{
++    PrivateData *p = (PrivateData *) drvthis->private_data;
++
++    return lcdgraphic_icon(p->lcdgraphic, x - 1, y - 1, icon);
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Draws a horizontal bar
++//
++MODULE_EXPORT void
++serdisplib_hbar(Driver *drvthis, int x, int y, int len, int promille, int options)
++{
++    PrivateData *p = (PrivateData *) drvthis->private_data;
++
++    lcdgraphic_hbar(p->lcdgraphic, x - 1, y - 1, len, promille, options);
++}
++
++///////////////////////////////////////////////////////////////////////////////
++// Draws a vertical bar
++//
++MODULE_EXPORT void
++serdisplib_vbar(Driver *drvthis, int x, int y, int len, int promille, int options)
++{
++    PrivateData *p = (PrivateData *) drvthis->private_data;
++
++    lcdgraphic_vbar(p->lcdgraphic, x - 1, y - 1, len, promille, options);
++}
++
++
++// vim: set sw=4 ts=4 et:
+--- a/LCDd.conf
++++ b/LCDd.conf
+@@ -40,7 +40,8 @@
+ #   EyeboxOne, g15, glcdlib, glk, hd44780, icp_a106, imon, IOWarrior,
+ #   irman, joy, lb216, lcdm001, lcterm, lirc, MD8800, ms6931, mtc_s16209x,
+ #   MtxOrb, NoritakeVFD, picolcd, pyramid, sed1330, sed1520, serialPOS,
+-#   serialVFD, sli, stv5730, svga, t6963, text, tyan, ula200, xosd
++#   serialVFD, sli, stv5730, svga, t6963, text, tyan, ula200, serdisplib,
++#   xosd
+ Driver=curses
+ 
+ # Tells the driver to bind to the given interface
+@@ -931,6 +932,31 @@
+ # KeyMap_E=Enter
+ # KeyMap_F=Escape
+ 
++## serdisplib meta-driver for dot-matrix displays ##
++[serdisplib]
++
++# the underlying serdisplib driver, e.g. ctinclud
++display_name=ctinclud
++
++# the display device, e.g. serraw:/dev/ttyS0, parport:/dev/parport0
++# or USB:07c0/1501 (vendor ID, device ID)
++display_device=USB:07c0/1501
++
++# the font which is used for rendering, this font must be monospace
++# and should contain some special Unicode characters like arrows
++# (Andale Mono is recommended and can be fetched at
++# http://corefonts.sf.net or from a Windows installation)
++normal_font=/usr/share/fonts/truetype/andalemo.ttf
++
++# invert the display (black => white, white => black)
++invert=0
++
++# the size of one characters, the number of characters is calculated
++# automatically from this and from border_size (see below)
++char_size=6x10
++
++# size of the border around the drawing area
++border_size=0x0
+ 
+ 
+ ## Wirz SLI LCD driver ##