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archived-lcd4linux/drv_generic_text.c
reinelt 8dc94dba65 [lcd4linux @ 2004-06-01 06:45:28 by reinelt] 
some Fixme's processed
documented some code

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@456 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
2004-06-01 06:45:30 +00:00

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/* $Id: drv_generic_text.c,v 1.15 2004/06/01 06:45:30 reinelt Exp $
*
* generic driver helper for text-based displays
*
* Copyright 1999, 2000 Michael Reinelt <reinelt@eunet.at>
* Copyright 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
*
* This file is part of LCD4Linux.
*
* LCD4Linux 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, or (at your option)
* any later version.
*
* LCD4Linux 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* $Log: drv_generic_text.c,v $
* Revision 1.15 2004/06/01 06:45:30 reinelt
*
* some Fixme's processed
* documented some code
*
* Revision 1.14 2004/05/26 11:37:36 reinelt
*
* Curses driver ported.
*
* Revision 1.13 2004/03/19 09:17:46 reinelt
*
* removed the extra 'goto' function, row and col are additional parameters
* of the write() function now.
*
* Revision 1.12 2004/03/03 03:47:04 reinelt
* big patch from Martin Hejl:
* - use qprintf() where appropriate
* - save CPU cycles on gettimeofday()
* - add quit() functions to free allocated memory
* - fixed lots of memory leaks
*
* Revision 1.11 2004/02/15 21:43:43 reinelt
* T6963 driver nearly finished
* framework for graphic displays done
* i2c_sensors patch from Xavier
* some more old generation files removed
*
* Revision 1.10 2004/02/14 11:56:17 reinelt
* M50530 driver ported
* changed lots of 'char' to 'unsigned char'
*
* Revision 1.9 2004/02/07 13:45:23 reinelt
* icon visibility patch #2 from Xavier
*
* Revision 1.8 2004/01/30 20:57:56 reinelt
* HD44780 patch from Martin Hejl
* dmalloc integrated
*
* Revision 1.7 2004/01/29 04:40:02 reinelt
* every .c file includes "config.h" now
*
* Revision 1.6 2004/01/23 07:04:23 reinelt
* icons finished!
*
* Revision 1.5 2004/01/23 04:53:54 reinelt
* icon widget added (not finished yet!)
*
* Revision 1.4 2004/01/22 07:57:45 reinelt
* several bugs fixed where segfaulting on layout>display
* Crystalfontz driver optimized, 632 display already works
*
* Revision 1.3 2004/01/20 14:25:12 reinelt
* some reorganization
* moved drv_generic to drv_generic_serial
* moved port locking stuff to drv_generic_serial
*
* Revision 1.2 2004/01/20 12:45:47 reinelt
* "Default screen" working with MatrixOrbital
*
* Revision 1.1 2004/01/20 05:36:59 reinelt
* moved text-display-specific stuff to drv_generic_text
* moved all the bar stuff from drv_generic_bar to generic_text
*
*/
/*
*
* exported variables:
*
* extern int DROWS, DCOLS; // display size
* extern int LROWS, LCOLS; // layout size
* extern int XRES, YRES; // pixel width/height of one char
* extern int GOTO_COST; // number of bytes a goto command requires
* extern int CHARS, CHAR0; // number of user-defineable characters, ASCII of first char
* extern int ICONS; // number of user-defineable characters reserved for icons
*
*
* these functions must be implemented by the real driver:
*
* void (*drv_generic_text_real_write)(int row, int col, unsigned char *data, int len);
* writes a text of specified length at position (row, col)
*
* void (*drv_generic_text_real_defchar)(int ascii, unsigned char *buffer);
* defines the bitmap of a user-defined character
*
*
* exported fuctions:
*
* int drv_generic_text_init (char *section, char *driver);
* initializes the generic text driver
*
* int drv_generic_text_draw (WIDGET *W);
* renders Text widget into framebuffer
* calls drv_generic_text_real_write()
*
* int drv_generic_text_icon_init (void);
* initializes the generic icon driver
*
* int drv_generic_text_icon_draw (WIDGET *W);
* renders Icon widget into framebuffer
* calls drv_generic_text_real_write() and drv_generic_text_real_defchar()
*
* int drv_generic_text_bar_init (int single_segments);
* initializes the generic icon driver
*
* void drv_generic_text_bar_add_segment (int val1, int val2, DIRECTION dir, int ascii);
* adds a 'fixed' character to the bar-renderer
*
* int drv_generic_text_bar_draw (WIDGET *W);
* renders Bar widget into framebuffer
* calls drv_generic_text_real_write() and drv_generic_text_real_defchar()
*
* int drv_generic_text_quit (void);
* closes the generic text driver
*
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <termios.h>
#include <fcntl.h>
#include "debug.h"
#include "cfg.h"
#include "plugin.h"
#include "widget.h"
#include "widget_text.h"
#include "widget_icon.h"
#include "widget_bar.h"
#include "drv.h"
#include "drv_generic_text.h"
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif
typedef struct {
int val1;
int val2;
DIRECTION dir;
int segment;
} BAR;
typedef struct {
int val1;
int val2;
DIRECTION dir;
int used;
int ascii;
} SEGMENT;
static char *Section=NULL;
static char *Driver=NULL;
int DROWS, DCOLS; // display size
int LROWS, LCOLS; // layout size
int XRES, YRES; // pixels of one char cell
int GOTO_COST; // number of bytes a goto command requires
int CHARS, CHAR0; // number of user-defineable characters, ASCII of first char
int ICONS; // number of user-defineable characters reserved for icons
static unsigned char *LayoutFB = NULL;
static unsigned char *DisplayFB = NULL;
static int Single_Segments = 0;
static int nSegment = 0;
static int fSegment = 0;
static SEGMENT Segment[128];
static BAR *BarFB = NULL;
// ****************************************
// *** generic Framebuffer stuff ***
// ****************************************
static void drv_generic_text_resizeFB (int rows, int cols)
{
char *newFB;
BAR *newBar;
int i, row, col;
// Layout FB is large enough
if (rows<=LROWS && cols<=LCOLS)
return;
// get maximum values
if (rows<LROWS) rows=LROWS;
if (cols<LCOLS) cols=LCOLS;
// allocate new Layout FB
newFB=malloc(cols*rows*sizeof(char));
memset (newFB, ' ', rows*cols*sizeof(char));
// transfer contents
if (LayoutFB!=NULL) {
for (row=0; row<LROWS; row++) {
for (col=0; col<LCOLS; col++) {
newFB[row*cols+col]=LayoutFB[row*LCOLS+col];
}
}
free (LayoutFB);
}
LayoutFB = newFB;
// resize Bar buffer
if (BarFB) {
newBar=malloc (rows*cols*sizeof(BAR));
for (i=0; i<rows*cols; i++) {
newBar[i].val1 = -1;
newBar[i].val2 = -1;
newBar[i].dir = 0;
newBar[i].segment = -1;
}
// transfer contents
for (row=0; row<LROWS; row++) {
for (col=0; col<LCOLS; col++) {
newBar[row*cols+col]=BarFB[row*LCOLS+col];
}
}
free (BarFB);
BarFB=newBar;
}
LCOLS = cols;
LROWS = rows;
}
int drv_generic_text_draw (WIDGET *W)
{
WIDGET_TEXT *Text=W->data;
char *txt, *fb1, *fb2;
int row, col, col0, len, end;
row=W->row;
col=W->col;
txt=Text->buffer;
len=strlen(txt);
end=col+len;
// maybe grow layout framebuffer
drv_generic_text_resizeFB (row+1, col+len);
fb1 = LayoutFB + row*LCOLS;
fb2 = DisplayFB + row*DCOLS;
// transfer new text into layout buffer
memcpy (fb1+col, txt, len);
if (row<DROWS) {
for (; col<=end && col<DCOLS; col++) {
int pos1, pos2, equal;
if (fb1[col]==fb2[col]) continue;
col0 = col;
for (pos1=col, pos2=pos1, col++, equal=0; col<=end && col<DCOLS; col++) {
if (fb1[col]==fb2[col]) {
// If we find just one equal byte, we don't break, because this
// would require a goto, which takes several bytes, too.
if (++equal>GOTO_COST) break;
} else {
pos2=col;
equal=0;
}
}
memcpy ( fb2+pos1, fb1+pos1, pos2-pos1+1);
drv_generic_text_real_write (row, col0, fb2+pos1, pos2-pos1+1);
}
}
return 0;
}
// ****************************************
// *** generic icon handling ***
// ****************************************
int drv_generic_text_icon_draw (WIDGET *W)
{
static int icon_counter=0;
WIDGET_ICON *Icon = W->data;
int row, col;
unsigned char ascii;
row = W->row;
col = W->col;
// maybe grow layout framebuffer
drv_generic_text_resizeFB (row+1, col+1);
// icon deactivated?
if (Icon->ascii==-2) return 0;
// ASCII already assigned?
if (Icon->ascii==-1) {
if (icon_counter>=ICONS) {
error ("cannot process icon '%s': out of icons", W->name);
Icon->ascii=-2;
return -1;
}
icon_counter++;
Icon->ascii=CHAR0+CHARS-icon_counter;
}
// maybe redefine icon
if (Icon->curmap!=Icon->prvmap) {
drv_generic_text_real_defchar(Icon->ascii, Icon->bitmap+YRES*Icon->curmap);
}
// use blank if invisible
ascii=Icon->visible?Icon->ascii:' ';
// transfer icon into layout buffer
LayoutFB[row*LCOLS+col]=ascii;
// maybe send icon to the display
if (DisplayFB[row*DCOLS+col]!=ascii) {
DisplayFB[row*DCOLS+col]=ascii;
drv_generic_text_real_write (row, col, DisplayFB+row*DCOLS+col, 1);
}
return 0;
}
// ****************************************
// *** generic bar handling ***
// ****************************************
static void drv_generic_text_bar_clear(void)
{
int i;
for (i=0; i<LROWS*LCOLS; i++) {
BarFB[i].val1 = -1;
BarFB[i].val2 = -1;
BarFB[i].dir = 0;
BarFB[i].segment = -1;
}
for (i=0; i<nSegment;i++) {
Segment[i].used = 0;
}
}
static void drv_generic_text_bar_create_bar (int row, int col, DIRECTION dir, int len, int val1, int val2)
{
int rev=0;
switch (dir) {
case DIR_WEST:
val1 = len-val1;
val2 = len-val2;
rev = 1;
case DIR_EAST:
while (len > 0 && col < LCOLS) {
BarFB[row*LCOLS+col].dir=dir;
BarFB[row*LCOLS+col].segment=-1;
if (val1 >= XRES) {
BarFB[row*LCOLS+col].val1 = rev?0:XRES;
val1 -= XRES;
} else {
BarFB[row*LCOLS+col].val1 = rev?XRES-val1:val1;
val1 = 0;
}
if (val2 >= XRES) {
BarFB[row*LCOLS+col].val2 = rev?0:XRES;
val2 -= XRES;
} else {
BarFB[row*LCOLS+col].val2 = rev?XRES-val2:val2;
val2 = 0;
}
len--;
col++;
}
break;
case DIR_SOUTH:
val1 = len-val1;
val2 = len-val2;
rev = 1;
case DIR_NORTH:
while (len > 0 && row < LROWS) {
BarFB[row*LCOLS+col].dir=dir;
BarFB[row*LCOLS+col].segment=-1;
if (val1 >= YRES) {
BarFB[row*LCOLS+col].val1 = rev?0:YRES;
val1 -= YRES;
} else {
BarFB[row*LCOLS+col].val1 = rev?YRES-val1:val1;
val1 = 0;
}
if (val2 >= YRES) {
BarFB[row*LCOLS+col].val2 = rev?0:YRES;
val2 -= YRES;
} else {
BarFB[row*LCOLS+col].val2 = rev?YRES-val2:val2;
val2 = 0;
}
len--;
row++;
}
break;
}
}
static void drv_generic_text_bar_create_segments (void)
{
int i, j, n;
int res, l1, l2;
/* find first unused segment */
for (i=fSegment; i<nSegment && Segment[i].used; i++);
/* pack unused segments */
for (j=i+1; j<nSegment; j++) {
if (Segment[j].used)
Segment[i++]=Segment[j];
}
nSegment=i;
/* create needed segments */
for (n=0; n<LROWS*LCOLS; n++) {
if (BarFB[n].dir==0) continue;
res=BarFB[n].dir & (DIR_EAST|DIR_WEST) ? XRES:YRES;
for (i=0; i<nSegment; i++) {
if (Segment[i].dir & BarFB[n].dir) {
l1 = Segment[i].val1; if (l1>res) l1=res;
l2 = Segment[i].val2; if (l2>res) l2=res;
if (l1 == BarFB[n].val1 && l2 == BarFB[n].val2) break;
}
}
if (i==nSegment) {
nSegment++;
Segment[i].val1=BarFB[n].val1;
Segment[i].val2=BarFB[n].val2;
Segment[i].dir=BarFB[n].dir;
Segment[i].used=0;
Segment[i].ascii=-1;
}
BarFB[n].segment=i;
}
}
static int drv_generic_text_bar_segment_error (int i, int j)
{
int res;
int i1, i2, j1, j2;
if (i==j) return 65535;
if (!(Segment[i].dir & Segment[j].dir)) return 65535;
res = Segment[i].dir&(DIR_EAST|DIR_WEST) ? XRES:YRES;
i1=Segment[i].val1; if (i1>res) i1=res;
i2=Segment[i].val2; if (i2>res) i2=res;
j1=Segment[j].val1; if (j1>res) j1=res;
j2=Segment[j].val2; if (j2>res) j2=res;
if (i1==0 && j1!=0) return 65535;
if (i2==0 && j2!=0) return 65535;
if (i1==res && j1<res) return 65535;
if (i2==res && j2<res) return 65535;
if (i1==1 && j1!=1 && i2 > 0) return 65535;
if (i2==1 && j2!=1 && j1 > 0) return 65535;
if (i1==i2 && j1!=j2) return 65535;
return (i1-j1)*(i1-j1)+(i2-j2)*(i2-j2);
}
static void drv_generic_text_bar_pack_segments (void)
{
int i, j, n, min;
int pack_i, pack_j;
int pass1=1;
int error[nSegment][nSegment];
if (nSegment<=fSegment+CHARS-ICONS) {
return;
}
for (i=0; i<nSegment; i++) {
for (j=0; j<nSegment; j++) {
error[i][j]=drv_generic_text_bar_segment_error(i,j);
}
}
while (nSegment>fSegment+CHARS-ICONS) {
min=65535;
pack_i=-1;
pack_j=-1;
for (i=fSegment; i<nSegment; i++) {
if (pass1 && Segment[i].used) continue;
for (j=0; j<nSegment; j++) {
if (error[i][j]<min) {
min=error[i][j];
pack_i=i;
pack_j=j;
}
}
}
if (pack_i==-1) {
if (pass1) {
pass1=0;
continue;
} else {
error ("unable to compact bar characters");
error ("nSegment=%d fSegment=%d CHARS=%d ICONS=%d", nSegment, fSegment, CHARS, ICONS);
error ("Segment[0].val1=%d val2=%d", Segment[0].val1, Segment[0].val2);
error ("Segment[1].val1=%d val2=%d", Segment[1].val1, Segment[1].val2);
error ("Segment[2].val1=%d val2=%d", Segment[2].val1, Segment[2].val2);
nSegment=CHARS-ICONS;
break;
}
}
#if 0
debug ("pack_segment: n=%d i=%d j=%d min=%d", nSegment, pack_i, pack_j, min);
debug ("Pack_segment: i1=%d i2=%d j1=%d j2=%d\n",
Segment[pack_i].val1, Segment[pack_i].val2,
Segment[pack_j].val1, Segment[pack_j].val2);
#endif
nSegment--;
Segment[pack_i]=Segment[nSegment];
for (i=0; i<nSegment; i++) {
error[pack_i][i]=error[nSegment][i];
error[i][pack_i]=error[i][nSegment];
}
for (n=0; n<LROWS*LCOLS; n++) {
if (BarFB[n].segment==pack_i) BarFB[n].segment=pack_j;
if (BarFB[n].segment==nSegment) BarFB[n].segment=pack_i;
}
}
}
static void drv_generic_text_bar_define_chars(void)
{
int c, i, j;
unsigned char buffer[8];
for (i=fSegment; i<nSegment; i++) {
if (Segment[i].used) continue;
if (Segment[i].ascii!=-1) continue;
for (c=0; c<CHARS-ICONS; c++) {
for (j=fSegment; j<nSegment; j++) {
if (Segment[j].ascii==c) break;
}
if (j==nSegment) break;
}
Segment[i].ascii=c;
switch (Segment[i].dir) {
case DIR_WEST:
for (j=0; j<4; j++) {
buffer[j ]=(1<<Segment[i].val1)-1;
buffer[j+4]=(1<<Segment[i].val2)-1;
}
break;
case DIR_EAST:
for (j=0; j<4; j++) {
buffer[j ]=255<<(XRES-Segment[i].val1);
buffer[j+4]=255<<(XRES-Segment[i].val2);
}
break;
case DIR_NORTH:
for (j=0; j<Segment[i].val1; j++) {
buffer[7-j]=(1<<XRES)-1;
}
for (; j<YRES; j++) {
buffer[7-j]=0;
}
break;
case DIR_SOUTH:
for (j=0; j<Segment[i].val1; j++) {
buffer[j]=(1<<XRES)-1;
}
for (; j<YRES; j++) {
buffer[j]=0;
}
break;
}
drv_generic_text_real_defchar(CHAR0+c, buffer);
}
}
int drv_generic_text_bar_draw (WIDGET *W)
{
WIDGET_BAR *Bar = W->data;
int row, col, col0, len, res, max, val1, val2;
int c, n, s;
DIRECTION dir;
row = W->row;
col = W->col;
dir = Bar->direction;
len = Bar->length;
// maybe grow layout framebuffer
// bars *always* grow heading North or East!
if (dir & (DIR_EAST|DIR_WEST)) {
drv_generic_text_resizeFB (row+1, col+len);
} else {
drv_generic_text_resizeFB (row+1, col+1);
}
res = dir & (DIR_EAST|DIR_WEST) ? XRES : YRES;
max = len * res;
val1 = Bar->val1 * (double)(max);
val2 = Bar->val2 * (double)(max);
if (val1 < 1) val1 = 1;
else if (val1 > max) val1 = max;
if (val2 < 1) val2 = 1;
else if (val2 > max) val2 = max;
if (Single_Segments) val2 = val1;
// create this bar
drv_generic_text_bar_create_bar (row, col, dir, len, val1, val2);
// process all bars
drv_generic_text_bar_create_segments ();
drv_generic_text_bar_pack_segments ();
drv_generic_text_bar_define_chars();
// reset usage flags
for (s=0; s<nSegment; s++) {
Segment[s].used=0;
}
// set usage flags
for (n=0; n<LROWS*LCOLS; n++) {
if ((s=BarFB[n].segment)!=-1) Segment[s].used=1;
}
// transfer bars into layout buffer
for (n=0; n<LCOLS*LROWS; n++) {
s=BarFB[n].segment;
if (s==-1) continue;
c=Segment[s].ascii;
if (c==-1) continue;
if (s>=fSegment) c+=CHAR0; // ascii offset for user-defineable chars
if(c==LayoutFB[n]) continue;
LayoutFB[n]=c;
}
// transfer differences to the display
for (row=0; row<DROWS; row++) {
for (col=0; col<DCOLS; col++) {
int pos1, pos2, equal;
if (LayoutFB[row*LCOLS+col]==DisplayFB[row*DCOLS+col]) continue;
col0 = col;
for (pos1=col, pos2=pos1, col++, equal=0; col<DCOLS; col++) {
if (LayoutFB[row*LCOLS+col]==DisplayFB[row*DCOLS+col]) {
// If we find just one equal byte, we don't break, because this
// would require a goto, which takes several bytes, too.
if (++equal>GOTO_COST) break;
} else {
pos2=col;
equal=0;
}
}
memcpy ( DisplayFB+row*DCOLS+pos1, LayoutFB+row*LCOLS+pos1, pos2-pos1+1);
drv_generic_text_real_write (row, col0, DisplayFB+row*DCOLS+pos1, pos2-pos1+1);
}
}
return 0;
}
// ****************************************
// *** generic init/quit ***
// ****************************************
int drv_generic_text_init (char *section, char *driver)
{
Section=section;
Driver=driver;
// init display framebuffer
DisplayFB = (char*)malloc(DCOLS*DROWS*sizeof(char));
memset (DisplayFB, ' ', DROWS*DCOLS*sizeof(char));
// init layout framebuffer
LROWS = 0;
LCOLS = 0;
LayoutFB=NULL;
drv_generic_text_resizeFB (DROWS, DCOLS);
// sanity check
if (LayoutFB==NULL || DisplayFB==NULL) {
error ("%s: framebuffer could not be allocated: malloc() failed", Driver);
return -1;
}
return 0;
}
int drv_generic_text_icon_init (void)
{
if (cfg_number(Section, "Icons", 0, 0, CHARS, &ICONS)<0) return -1;
if (ICONS>0) {
info ("%s: reserving %d of %d user-defined characters for icons", Driver, ICONS, CHARS);
}
return 0;
}
int drv_generic_text_bar_init (int single_segments)
{
if (BarFB) free (BarFB);
if ((BarFB=malloc (LROWS*LCOLS*sizeof(BAR)))==NULL) {
error ("bar buffer allocation failed: out of memory");
return -1;
}
Single_Segments = single_segments;
nSegment=0;
fSegment=0;
drv_generic_text_bar_clear();
return 0;
}
void drv_generic_text_bar_add_segment(int val1, int val2, DIRECTION dir, int ascii)
{
Segment[fSegment].val1=val1;
Segment[fSegment].val2=val2;
Segment[fSegment].dir=dir;
Segment[fSegment].used=0;
Segment[fSegment].ascii=ascii;
fSegment++;
nSegment=fSegment;
}
int drv_generic_text_quit (void) {
if (LayoutFB) {
free(LayoutFB);
LayoutFB=NULL;
}
if (DisplayFB) {
free(DisplayFB);
DisplayFB=NULL;
}
if (BarFB) {
free (BarFB);
BarFB=NULL;
}
widget_unregister();
return (0);
}
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