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archived-lcd4linux/drv_generic_text.c
michael a9d650fb4d removed all tags 
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@727 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
2007-01-14 08:21:55 +00:00

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/* $Id$
* $URL$
*
* generic driver helper for text-based displays
*
* Copyright (C) 1999, 2000 Michael Reinelt <reinelt@eunet.at>
* Copyright (C) 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.
*
*/
/*
*
* exported variables:
*
* extern int CHARS, CHAR0; number of user-defineable characters, ASCII of first char
* extern int ICONS; number of user-defineable characters reserved for icons
* extern int GOTO_COST; number of bytes a goto command requires
* extern int INVALIDATE; re-send a modified userdefined char?
*
*
* 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.h"
#include "drv_generic_text.h"
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif
typedef struct {
int val1;
int val2;
DIRECTION dir;
STYLE style;
int segment;
int invalid;
} BAR;
typedef struct {
int val1;
int val2;
DIRECTION dir;
STYLE style;
int used;
int ascii;
} SEGMENT;
static char *Section = NULL;
static char *Driver = NULL;
int CHARS = 0; /* number of user-defineable characters */
int CHAR0 = 0; /* ASCII of first user-defineable char */
int ICONS = 0; /* number of user-defineable characters reserved for icons */
int GOTO_COST = 0; /* number of bytes a goto command requires */
int INVALIDATE = 0; /* re-send a modified userdefined char? */
void (*drv_generic_text_real_write) () = NULL;
void (*drv_generic_text_real_defchar) () = NULL;
static char *LayoutFB = NULL;
static char *DisplayFB = NULL;
static int *L2D = 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;
int *newL2D;
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(*newFB));
memset(newFB, ' ', rows * cols * sizeof(*newFB));
/* 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;
/* allocate new transformer */
newL2D = malloc(cols * rows * sizeof(*newL2D));
/* intitialize translator */
for (row = 0; row < rows; row++) {
for (col = 0; col < cols; col++) {
newL2D[row * cols + col] = row * DCOLS + col;
}
}
/* transfer transformer */
if (L2D != NULL) {
for (row = 0; row < LROWS; row++) {
for (col = 0; col < LCOLS; col++) {
newL2D[row * cols + col] = L2D[row * LCOLS + col];
}
}
free(L2D);
}
L2D = newL2D;
/* 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;
newBar[i].invalid = 0;
}
/* 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;
}
static void drv_generic_text_blit(const int row, const int col, const int height, const int width)
{
int lr, lc; /* layout row/col */
int dr, dc; /* display row/col */
int p1, p2; /* start/end positon of changed area */
int eq; /* counter for equal contents */
/* loop over layout rows */
for (lr = row; lr < LROWS && lr < row + height; lr++) {
/* transform layout to display row */
dr = lr;
/* sanity check */
if (dr < 0 || dr >= DROWS)
continue;
/* loop over layout cols */
for (lc = col; lc < LCOLS && lc < col + width; lc++) {
/* transform layout to display column */
dc = lc;
/* sanity check */
if (dc < 0 || dc >= DCOLS)
continue;
/* find start of difference */
if (DisplayFB[dr * DCOLS + dc] == LayoutFB[lr * LCOLS + lc])
continue;
/* find end of difference */
for (p1 = dc, p2 = p1, eq = 0, lc++; lc < LCOLS && lc < col + width; lc++) {
/* transform layout to display column */
dc = lc;
/* sanity check */
if (dc < 0 || dc >= DCOLS)
continue;
if (DisplayFB[dr * DCOLS + dc] == LayoutFB[lr * LCOLS + lc]) {
if (++eq > GOTO_COST)
break;
} else {
p2 = dc;
eq = 0;
}
}
/* send to display */
memcpy(DisplayFB + dr * DCOLS + p1, LayoutFB + lr * LCOLS + p1, p2 - p1 + 1);
if (drv_generic_text_real_write)
drv_generic_text_real_write(dr, p1, DisplayFB + dr * DCOLS + p1, p2 - p1 + 1);
}
}
}
/****************************************/
/*** generic text handling ***/
/****************************************/
int drv_generic_text_init(const char *section, const char *driver)
{
Section = (char *) section;
Driver = (char *) driver;
/* init display framebuffer */
DisplayFB = (char *) malloc(DCOLS * DROWS * sizeof(*DisplayFB));
memset(DisplayFB, ' ', DROWS * DCOLS * sizeof(*DisplayFB));
/* init layout framebuffer */
LROWS = 0;
LCOLS = 0;
LayoutFB = NULL;
L2D = NULL;
drv_generic_text_resizeFB(DROWS, DCOLS);
/* sanity check */
if (DisplayFB == NULL || LayoutFB == NULL || L2D == NULL) {
error("%s: framebuffer could not be allocated: malloc() failed", Driver);
return -1;
}
/* init generic driver & register plugins */
drv_generic_blit = drv_generic_text_blit;
drv_generic_init();
return 0;
}
/* say hello to the user */
int drv_generic_text_greet(const char *msg1, const char *msg2)
{
int i;
int flag = 0;
char *line1[] = { "* LCD4Linux " VERSION " *",
"LCD4Linux " VERSION,
"* LCD4Linux *",
"LCD4Linux",
"L4Linux",
NULL
};
char *line2[] = { "http://lcd4linux.bulix.org",
"lcd4linux.bulix.org",
NULL
};
for (i = 0; line1[i]; i++) {
if (strlen(line1[i]) <= (unsigned) DCOLS) {
if (drv_generic_text_real_write)
drv_generic_text_real_write(0, (DCOLS - strlen(line1[i])) / 2, line1[i], strlen(line1[i]));
flag = 1;
break;
}
}
if (DROWS >= 2) {
for (i = 0; line2[i]; i++) {
if (strlen(line2[i]) <= (unsigned) DCOLS) {
if (drv_generic_text_real_write)
drv_generic_text_real_write(1, (DCOLS - strlen(line2[i])) / 2, line2[i], strlen(line2[i]));
flag = 1;
break;
}
}
}
if (msg1 && DROWS >= 3) {
int len = strlen(msg1);
if (len <= DCOLS) {
if (drv_generic_text_real_write)
drv_generic_text_real_write(2, (DCOLS - len) / 2, msg1, len);
flag = 1;
}
}
if (msg2 && DROWS >= 4) {
int len = strlen(msg2);
if (len <= DCOLS) {
if (drv_generic_text_real_write)
drv_generic_text_real_write(3, (DCOLS - len) / 2, msg2, len);
flag = 1;
}
}
return flag;
}
int drv_generic_text_draw(WIDGET * W)
{
WIDGET_TEXT *Text = W->data;
char *txt;
int row, col, len;
row = W->row;
col = W->col;
txt = Text->buffer;
len = strlen(txt);
/* maybe grow layout framebuffer */
drv_generic_text_resizeFB(row + 1, col + len);
/* transfer new text into layout buffer */
memcpy(LayoutFB + row * LCOLS + col, txt, len);
/* blit it */
drv_generic_text_blit(row, col, 1, len);
return 0;
}
int drv_generic_text_quit(void)
{
if (DisplayFB) {
free(DisplayFB);
DisplayFB = NULL;
}
if (LayoutFB) {
free(LayoutFB);
LayoutFB = NULL;
}
if (L2D) {
free(L2D);
L2D = NULL;
}
if (BarFB) {
free(BarFB);
BarFB = NULL;
}
widget_unregister();
return (0);
}
/****************************************/
/*** generic icon handling ***/
/****************************************/
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_icon_draw(WIDGET * W)
{
static int icon_counter = 0;
WIDGET_ICON *Icon = W->data;
int row, col;
int invalidate = 0;
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 && Icon->visible) {
Icon->prvmap = Icon->curmap;
if (drv_generic_text_real_defchar)
drv_generic_text_real_defchar(Icon->ascii, Icon->bitmap + YRES * Icon->curmap);
invalidate = INVALIDATE;
}
/* use blank if invisible */
ascii = Icon->visible ? Icon->ascii : ' ';
/* transfer icon into layout buffer */
LayoutFB[row * LCOLS + col] = ascii;
/* ugly invalidation: change display FB to a wrong value so blit() will really send it */
if (invalidate) {
DisplayFB[row * DCOLS + col] = ~ascii;
}
/* blit it */
drv_generic_text_blit(row, col, 1, 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].style = 0;
BarFB[i].segment = -1;
BarFB[i].invalid = 0;
}
for (i = 0; i < nSegment; i++) {
Segment[i].used = 0;
}
}
int drv_generic_text_bar_init(const 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(const int val1, const int val2, const DIRECTION dir, const int ascii)
{
Segment[fSegment].val1 = val1;
Segment[fSegment].val2 = val2;
Segment[fSegment].dir = dir;
if (val1 == 0 && val2 == 0)
Segment[fSegment].style = 0;
else
Segment[fSegment].style = 255;
Segment[fSegment].used = 0;
Segment[fSegment].ascii = ascii;
fSegment++;
nSegment = fSegment;
}
static void drv_generic_text_bar_create_bar(int row, int col, const DIRECTION dir, STYLE style, int len, int val1,
int val2)
{
int rev = 0, max;
if (style)
BarFB[row * LCOLS + col].style = STYLE_FIRST;
switch (dir) {
case DIR_WEST:
max = len * XRES;
val1 = max - val1;
val2 = max - val2;
rev = 1;
case DIR_EAST:
while (len > 0 && col < LCOLS) {
BarFB[row * LCOLS + col].dir = dir;
BarFB[row * LCOLS + col].segment = -1;
if (style && BarFB[row * LCOLS + col].style == 0)
BarFB[row * LCOLS + col].style = style;
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++;
}
if (style)
BarFB[row * LCOLS + col - 1].style = STYLE_LAST;
break;
case DIR_NORTH:
max = len * YRES;
val1 = max - val1;
val2 = max - val2;
rev = 1;
case DIR_SOUTH:
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++) {
l1 = Segment[i].val1;
if (l1 > res)
l1 = res;
l2 = Segment[i].val2;
if (l2 > res)
l2 = res;
/* same value */
if (l1 == BarFB[n].val1 && l2 == BarFB[n].val2) {
/* empty block, only style is interesting */
if (l1 == 0 && l2 == 0 && Segment[i].style == BarFB[n].style)
break;
/* full block, style doesn't matter */
if (l1 == res && l2 == res)
break;
/* half upper block */
if (l1 == res && l2 == 0 && Segment[i].style == BarFB[n].style)
break;
/* half lower block */
if (l1 == 0 && l2 == res && Segment[i].style == BarFB[n].style)
break;
/* same style, same direction */
if (Segment[i].style == BarFB[n].style && Segment[i].dir & BarFB[n].dir)
break;
#if 0
/* hollow style, val(1,2) == 1, like '[' */
if (l1 == 1 && l2 == 1 && Segment[i].style == STYLE_FIRST && BarFB[n].style == STYLE_HOLLOW)
break;
/* hollow style, val(1,2) == 1, like ']' */
if (l1 == 1 && l2 == 1 && Segment[i].style == STYLE_LAST && BarFB[n].style == STYLE_HOLLOW)
break;
#endif
}
}
if (i == nSegment) {
nSegment++;
Segment[i].val1 = BarFB[n].val1;
Segment[i].val2 = BarFB[n].val2;
Segment[i].dir = BarFB[n].dir;
Segment[i].style = BarFB[n].style;
Segment[i].used = 0;
Segment[i].ascii = -1;
}
BarFB[n].segment = i;
}
}
static int drv_generic_text_bar_segment_error(const int i, const int j)
{
int res;
int i1, i2, j1, j2;
if (i == j)
return 65535;
if (!(Segment[i].dir & Segment[j].dir))
return 65535;
if (Segment[i].style != Segment[j].style)
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;
/* do not replace empty with non-empty */
if (i1 == 0 && j1 != 0)
return 65535;
if (i2 == 0 && j2 != 0)
return 65535;
/* do not replace full with non-full */
if (i1 == res && j1 < res)
return 65535;
if (i2 == res && j2 < res)
return 65535;
/* do not replace start line */
/* but only if there are at least some chars available */
if (CHARS - ICONS > 0) {
if (i1 == 1 && j1 != 1 && i2 > 0)
return 65535;
if (i2 == 1 && j2 != 1 && j1 > 0)
return 65535;
}
/* do not replace equal length with non-equal length */
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);
// debug ("[%d][%d] = %d", i, j, 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:
if (Segment[i].style) {
buffer[0] = 255;
buffer[7] = 255;
if (Segment[i].style & (STYLE_FIRST | STYLE_LAST))
for (j = 1; j < 7; j++) {
buffer[j] |= Segment[i].style & STYLE_FIRST ? 16 : 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);
}
if (Segment[i].style) {
buffer[0] = 255;
buffer[7] = 255;
if (Segment[i].style & (STYLE_FIRST | STYLE_LAST))
for (j = 1; j < 7; j++) {
buffer[j] |= Segment[i].style & STYLE_FIRST ? 16 : 1;
}
}
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;
}
if (drv_generic_text_real_defchar)
drv_generic_text_real_defchar(CHAR0 + c, buffer);
/* maybe invalidate framebuffer */
if (INVALIDATE) {
for (j = 0; j < LROWS * LCOLS; j++) {
if (BarFB[j].segment == i) {
BarFB[j].invalid = 1;
}
}
}
}
}
int drv_generic_text_bar_draw(WIDGET * W)
{
WIDGET_BAR *Bar = W->data;
int row, col, len, res, max, val1, val2;
int c, n, s;
DIRECTION dir;
STYLE style;
row = W->row;
col = W->col;
dir = Bar->direction;
style = Bar->style;
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, style, 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 (row = 0; row < LROWS; row++) {
for (col = 0; col < LCOLS; col++) {
n = row * LCOLS + col;
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 */
LayoutFB[n] = c;
/* maybe invalidate display framebuffer */
if (BarFB[n].invalid) {
BarFB[n].invalid = 0;
/* ugly invalidation: change display FB to a wrong value so blit() will really send it */
DisplayFB[row * DCOLS + col] = ~LayoutFB[n];
}
}
}
/* blit whole layout FB */
drv_generic_text_blit(0, 0, LROWS, LCOLS);
return 0;
}
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