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d3223644a23a8727faf451f1dd8d16cf5691dfd6
lcdproc/server/render.c
T
robijn 2c40e25f0f Added server message in bottom-right corner of active screen. 
Will display short text if a rotation key is pressed.
2003-02-28 15:19:58 +00:00

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/*
* render.c
* This file is part of LCDd, the lcdproc server.
*
* This file is released under the GNU General Public License. Refer to the
* COPYING file distributed with this package.
*
* Copyright (c) 1999, William Ferrell, Scott Scriven
* 2001, Joris Robijn
*
*
* Draws screens on the LCD.
*
* This needs to be greatly expanded and redone for greater flexibility.
* For example, it should support multiple screen sizes, more flexible
* widgets, and multiple simultaneous screens.
*
* This will probably take a while to do. :(
*
* THIS FILE IS MESSY! Anyone care to rewrite it nicely? Please?? :)
*
* NOTE: (from David Douthitt) Multiple screen sizes? Multiple simultaneous
* screens? Horrors of horrors... next thing you know it'll be making coffee...
* Better believe it'll take a while to do...
*
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "shared/report.h"
#include "shared/LL.h"
#include "drivers.h"
#include "screen.h"
#include "screenlist.h"
#include "widget.h"
#include "render.h"
int heartbeat = HEARTBEAT_OPEN;
int heartbeat_fallback = HEARTBEAT_ON; /* If no heartbeat setting has been set at all */
int backlight = BACKLIGHT_OPEN;
int backlight_fallback = BACKLIGHT_ON; /* If no backlight setting has been set at all */
int backlight_brightness = 255;
int backlight_off_brightness = 0;
int output_state = 0;
char * server_msg_text;
int server_msg_expire = 0;
static int reset;
#define BUFSIZE 1024
static int render_frame (LinkedList * list, char fscroll, int left, int top, int right, int bottom, int fwid, int fhgt, int fspeed, long int timer);
int
render_screen (Screen * s, long int timer)
{
static Screen * old_s = NULL;
int tmp_state = 0;
debug(RPT_DEBUG, "%s( screen=[%.40s], timer=%d ) ==== START RENDERING ====", __FUNCTION__, s->id, timer );
reset = 1;
if (!s)
return -1;
if (s == old_s)
reset = 0;
old_s = s;
/* Clear the LCD screen... */
drivers_clear ();
/* FIXME drivers_backlight --
*
* If the screen's backlight isn't set (default) then we
* inherit the backlight state from the parent client. This allows
* the client to override it's childrens settings.
* The server can also override the clients and screens settings.
*/
if (backlight != BACKLIGHT_OPEN) {
tmp_state = backlight;
} else if (s->client && s->client->backlight != BACKLIGHT_OPEN) {
tmp_state = s->client->backlight;
} else if (s->backlight != BACKLIGHT_OPEN) {
tmp_state = s->backlight;
} else {
tmp_state = backlight_fallback;
}
/* Set up backlight to the correct state... */
/* NOTE: dirty stripping of other options... */
/* Backlight flash: check timer and flip backlight as appropriate */
if (tmp_state & BACKLIGHT_FLASH) {
drivers_backlight (
(
(tmp_state & BACKLIGHT_ON)
^ ((timer & 7) == 7)
) ? BACKLIGHT_ON : BACKLIGHT_OFF );
/* Backlight blink: check timer and flip backlight as appropriate */
}
else if (tmp_state & BACKLIGHT_BLINK) {
drivers_backlight (
(
(tmp_state & BACKLIGHT_ON)
^ ((timer & 14) == 14)
) ? BACKLIGHT_ON : BACKLIGHT_OFF );
} else {
/* Simple: Only send lowest bit then...*/
drivers_backlight (tmp_state & BACKLIGHT_ON);
}
/* Output ports from LCD - outputs depend on the current screen */
drivers_output (output_state);
/* Draw a frame... */
render_frame (s->widgetlist, 'v', 0, 0, display_props->width, display_props->height, s->width, s->height, (((s->duration / s->height) < 1) ? 1 : (s->duration / s->height)), timer);
/* Set the cursor */
drivers_cursor (s->cursor_x, s->cursor_y, s->cursor);
if (heartbeat != HEARTBEAT_OPEN) {
tmp_state = heartbeat;
} else if (s->client && s->client->heartbeat != HEARTBEAT_OPEN) {
tmp_state = s->client->heartbeat;
} else if (s->heartbeat != HEARTBEAT_OPEN) {
tmp_state = s->heartbeat;
} else {
tmp_state = heartbeat_fallback;
}
drivers_heartbeat(tmp_state);
/* If there is an server message that is not expired, display it */
if( server_msg_expire > 0 ) {
drivers_string( display_props->width - strlen(server_msg_text) + 1,
display_props->height, server_msg_text );
server_msg_expire --;
if( server_msg_expire == 0 ) {
free( server_msg_text );
}
}
/* flush display out, frame and all... */
drivers_flush ();
debug(RPT_DEBUG, "==== END RENDERING ====" );
return 0;
}
/* The following function is positively ghastly (as was mentioned above!) */
/* Best thing to do is to remove support for frames... but anyway... */
/* */
static int
render_frame (LinkedList * list,
char fscroll, /* direction of scrolling */
int left, /* left edge of frame */
int top, /* top edge of frame */
int right, /* right edge of frame */
int bottom, /* bottom edge of frame */
int fwid, /* frame width? */
int fhgt, /* frame height? */
int fspeed, /* speed of scrolling... */
long int timer) /* ? */
{
#define VerticalScrolling (fscroll == 'v')
#define HorizontalScrolling (fscroll == 'h')
char str[BUFSIZE]; /* scratch buffer */
Widget * w;
int vis_width, vis_height; /* Width and height of visible frame area */
int x, y;
int fx, fy; /* Scrolling offset for the frame... */
int length, speed;
/*int lines; */
int reset = 1;
debug( RPT_DEBUG, "%s( list=%p, fscroll='%c', left=%d, top=%d, "
"right=%d, bottom=%d, fwid=%d, fhgt=%d, fspeed=%d, timer=%d )",
__FUNCTION__, list, fscroll, left,top, right, bottom,
fwid, fhgt, fspeed, timer );
vis_width = right - left; /* This is the size of the visible frame area */
vis_height = bottom - top;
fx = 0;
fy = 0;
if (VerticalScrolling) {
if (fspeed > 0)
fy = (timer - fspeed) / fspeed;
else if (fspeed < 0)
fy = (-fspeed) * timer;
if (fy < 0)
fy = 0;
if (fhgt == 0) { fy = 0; } else { fy %= fhgt; }
if (fy > fhgt - vis_height)
fy = fhgt - vis_height;
} else if (HorizontalScrolling) {
/* TODO: Frames don't scroll horizontally yet! */
}
if (!list)
return -1;
LL_Rewind (list);
do {
w = (Widget *) LL_Get (list);
if (!w)
return -1;
/* TODO: Make this cleaner and more flexible!*/
switch (w->type) {
case WID_STRING:
if (w->x>0 && w->y>0 && w->text) {
if ((w->y <= vis_height + fy) && (w->y > fy)) {
if (w->x > vis_width) w->x=vis_width;
strncpy (str, w->text, vis_width - w->x + 1);
str[vis_width - w->x + 1] = 0;
drivers_string (w->x + left, w->y + top - fy, str);
}
}
break;
case WID_HBAR:
if (reset) {
//drivers_init_hbar ();
reset = 0;
}
if ((w->x > 0) && (w->y > 0)) {
if ((w->y <= vis_height + fy) && (w->y > fy)) {
if (w->length > 0) {
if ((w->length / display_props->cellwidth) < vis_width - w->x + 1) {
/*was: drivers_hbar (w->x + left, w->y + top - fy, w->length); */
/* improvised len and promille */
int full_len = display_props->width - w->x - left + 1;
int promille = (long) 1000 * w->length / ( display_props->cellwidth * full_len );
drivers_hbar (w->x + left, w->y + top - fy, full_len, promille, BAR_PATTERN_FILLED);
}
else {
/*was: drivers_hbar (w->x + left, w->y + top - fy, wid * display_props->cellwidth); */
/* Improvised len and promille while we have the old widget language */
int full_len = ( display_props->width - w->x - left + 1 );
drivers_hbar (w->x + left, w->y + top - fy, full_len, 1000, BAR_PATTERN_FILLED);
}
} else if (w->length < 0) {
/* TODO: Rearrange stuff to get left-extending
* hbars to draw correctly...
* .. er, this'll require driver modifications,
* so I'll leave it out for now.
*/
}
}
}
break;
case WID_VBAR: /* FIXME: Vbars don't work in frames!*/
if (reset) {
//drivers_init_vbar ();
reset = 0;
}
if ((w->x > 0) && (w->y > 0)) {
if (w->length > 0) {
/* Improvised len and promille while we have the old widget language */
int full_len = display_props->height;
int promille = (long) 1000 * w->length / display_props->cellheight / full_len;
drivers_vbar (w->x, display_props->height, full_len, promille, BAR_PATTERN_FILLED);
} else if (w->length < 0) {
/* TODO: Rearrange stuff to get down-extending
* vbars to draw correctly...
* .. er, this'll require driver modifications,
* so I'll leave it out for now.
*/
}
}
break;
case WID_ICON:
drivers_icon (w->x, w->y, w->length);
break;
case WID_TITLE: /* FIXME: Doesn't work quite right in frames...*/
if (!w->text)
break;
if (vis_width < 8)
break;
drivers_icon (w->x + left, w->y + top, ICON_BLOCK_FILLED);
drivers_icon (w->x + left + 1, w->y + top, ICON_BLOCK_FILLED);
length = strlen (w->text);
if (length <= vis_width - 6) {
strcpy (str, w->text);
x = length + 5;
} else /* Scroll the title, if it doesn't fit...*/
{
speed = 1;
x = timer / speed;
y = x / length;
x %= (length);
if (x < 0)
x = 0;
if (x > length - (vis_width - 6))
x = length - (vis_width - 6);
if (y & 1) /* Scrolling backwards...*/
{
x = (length - (vis_width - 6)) - x;
}
strncpy (str, w->text + x, (vis_width - 6));
x = vis_width - 1;
str[vis_width-6] = 0;
}
drivers_string (w->x + 3 + left, w->y + top, str);
for (; x<=vis_width; x++) {
drivers_icon (w->x + x - 1 + left, w->y + top, ICON_BLOCK_FILLED);
}
break;
case WID_SCROLLER: /* FIXME: doesn't work in frames...*/
{
int offset;
int screen_width;
if (!w->text)
break;
if (w->right < w->left)
break;
/*debug(RPT_DEBUG, "%s: %s %d",__FUNCTION__,w->text,timer);*/
screen_width = w->right - w->left + 1;
switch (w->length) { /* actually, direction...*/
/* FIXED: Horz scrollers don't show the
* last letter in the string... (1-off error?)
*/
case 'h':
length = strlen (w->text) + 1;
if (length <= screen_width) {
/* it fits within the box, just render it */
drivers_string (w->left, w->top, w->text);
} else {
int effLength = length - screen_width;
int necessaryTimeUnits = 0;
if (w->speed > 0) {
necessaryTimeUnits = effLength * w->speed;
if (((timer / (effLength * w->speed)) % 2) == 0) {
/*wiggle one way*/
offset = (timer % (effLength * w->speed))
/ w->speed;
} else {
/*wiggle the other*/
offset = (((timer % (effLength * w->speed))
- (effLength * w->speed) + 1)
/ w->speed) * -1;
}
} else if (w->speed < 0) {
necessaryTimeUnits = effLength / (w->speed * -1);
if (((timer / (effLength / (w->speed * -1))) % 2) == 0) {
offset = (timer % (effLength / (w->speed * -1)))
* w->speed * -1;
} else {
offset = (((timer % (effLength / (w->speed * -1)))
* w->speed * -1) - effLength + 1) * -1;
}
} else {
offset = 0;
}
if (offset <= length) {
strncpy (str, &((w->text)[offset]), screen_width);
str[screen_width] = '\0';
/*debug(RPT_DEBUG, "scroller %s : %d", str, length-offset); */
} else {
str[0] = '\0';
}
drivers_string (w->left, w->top, str);
}
break;
/* FIXME: Vert scrollers don't always seem to scroll */
/* back up after hitting the bottom. They jump back to */
/* the top instead... (nevermind?) */
case 'v':
{
int i = 0;
length = strlen (w->text);
if (length <= screen_width) {
/* no scrolling required... */
drivers_string (w->left, w->top, w->text);
} else {
int lines_required = (length / screen_width)
+ (length % screen_width ? 1 : 0);
int available_lines = (w->bottom - w->top + 1);
if (lines_required <= available_lines) {
/* easy...*/
for (i = 0; i < lines_required; i++) {
strncpy (str, &((w->text)[i * screen_width]), screen_width);
str[screen_width] = '\0';
drivers_string (w->left, w->top + i, str);
}
} else {
int necessaryTimeUnits = 0;
int effLines = lines_required - available_lines + 1;
int begin = 0;
/*debug(RPT_DEBUG, "length: %d sw: %d lines req: %d avail lines: %d effLines: %d ",length,screen_width,lines_required,available_lines,effLines);*/
if (w->speed > 0) {
necessaryTimeUnits = effLines * w->speed;
if (((timer / (effLines * w->speed)) % 2) == 0) {
/*debug(RPT_DEBUG, "up ");*/
begin = (timer % (effLines * w->speed))
/ w->speed;
} else {
/*debug(RPT_DEBUG, "down ");*/
begin = (((timer % (effLines * w->speed))
- (effLines * w->speed) + 1) / w->speed)
* -1;
}
} else if (w->speed < 0) {
necessaryTimeUnits = effLines / (w->speed * -1);
if (((timer / (effLines / (w->speed * -1))) % 2) == 0) {
begin = (timer % (effLines / (w->speed * -1)))
* w->speed * -1;
} else {
begin = (((timer % (effLines / (w->speed * -1)))
* w->speed * -1) - effLines + 1)
* -1;
}
} else {
begin = 0;
}
/*debug(RPT_DEBUG, "rendering begin: %d timer: %d effLines: %d",begin,timer,effLines); */
for (i = begin; i < begin + available_lines; i++) {
strncpy (str, &((w->text)[i * (screen_width)]), screen_width);
str[screen_width] = '\0';
/*debug(RPT_DEBUG, "rendering: '%s' of %s", */
/*str,w->text); */
drivers_string (w->left, w->top + (i - begin), str);
}
}
}
break;
}
}
break;
}
case WID_FRAME:
{
/* FIXME: doesn't handle nested frames quite right!
* doesn't handle scrolling in nested frames at all...
*/
int new_left, new_top, new_right, new_bottom;
new_left = left + w->left - 1;
new_top = top + w->top - 1;
new_right = left + w->right;
new_bottom = top + w->bottom;
if (new_right > right)
new_right = right;
if (new_bottom > bottom)
new_bottom = bottom;
if (new_left >= right || new_top >= bottom) { /* Do nothing if it's invisible...*/
} else {
render_frame (w->frame_screen->widgetlist, w->length, new_left, new_top, new_right, new_bottom, w->width, w->height, w->speed, timer);
}
}
break;
case WID_NUM: /* FIXME: doesn't work in frames...*/
/* NOTE: y=10 means COLON (:)*/
if ((w->x > 0) && (w->y >= 0) && (w->y <= 10)) {
if (reset) {
//drivers_init_num ();
reset = 0;
}
drivers_num (w->x + left, w->y);
}
break;
case WID_NONE:
default:
break;
}
} while (LL_Next (list) == 0);
return 0;
}
int
server_msg( const char * text, int expire )
{
debug( RPT_DEBUG, "%s( text=\"%.40s\", expire=%d )", __FUNCTION__, text, expire );
if( strlen(text) > 15 || expire <= 0 ) {
return -1;
}
/* Still a message active ? */
if( server_msg_expire > 0 ) {
free( server_msg_text );
}
/* Store new message */
server_msg_text = malloc( strlen(text) + 3 );
strcpy( server_msg_text, "| " );
strcat( server_msg_text, text );
server_msg_expire = expire;
return 0;
}
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