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/*
* GraphLCD driver library
*
* g15daemon.c - pseudo device for the g15daemon meta driver
* Output goes to the g15daemon which then displays it
*
* This file is released under the GNU General Public License. Refer
* to the COPYING file distributed with this package.
*
*/
#include <fcntl.h>
#include <stdio.h>
#include <syslog.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <poll.h>
#include <arpa/inet.h>
#include <unistd.h>
#include "common.h"
#include "config.h"
#include "g15daemon.h"
#define G15SERVER_PORT 15550
#define G15SERVER_ADDR "127.0.0.1"
#define G15_WIDTH 160
#define G15_HEIGHT 43
static int g15_send(int sock, char *buf, int len)
{
int total = 0;
int retval = 0;
int bytesleft = len;
while (total < len) {
retval = send(sock, buf+total, bytesleft, 0);
if (retval == -1) {
break;
}
bytesleft -= retval;
total += retval;
}
return retval==-1?-1:0;
}
static int g15_recv(int sock, char *buf, int len)
{
int total = 0;
int retval = 0;
int bytesleft = len;
while (total < len) {
retval = recv(sock, buf+total, bytesleft, 0);
if (retval < 1) {
break;
}
total += retval;
bytesleft -= retval;
}
return total;
}
static int open_g15_daemon()
{
int g15screen_fd;
struct sockaddr_in serv_addr;
char buffer[256];
g15screen_fd = socket(AF_INET, SOCK_STREAM, 0);
if (g15screen_fd < 0)
return -1;
memset(&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
inet_aton (G15SERVER_ADDR, &serv_addr.sin_addr);
serv_addr.sin_port = htons(G15SERVER_PORT);
if (connect(g15screen_fd,(struct sockaddr *)&serv_addr,sizeof(serv_addr)) < 0)
return -1;
memset(buffer,0,256);
if (g15_recv(g15screen_fd, buffer, 16)<0)
return -1;
/* here we check that we're really talking to the g15daemon */
if (strcmp(buffer,"G15 daemon HELLO") != 0)
return -1;
/* we want to use a pixelbuffer */
g15_send(g15screen_fd,"GBUF",4);
return g15screen_fd;
}
namespace GLCD
{
cDriverG15daemon::cDriverG15daemon(cDriverConfig * config)
: config(config),
offbuff(0),
sockfd(-1)
{
oldConfig = new cDriverConfig(*config);
}
cDriverG15daemon::~cDriverG15daemon()
{
delete oldConfig;
}
int cDriverG15daemon::Init()
{
// default values
width = config->width;
if (width !=G15_WIDTH)
width = G15_WIDTH;
height = config->height;
if (height !=G15_HEIGHT)
height = G15_HEIGHT;
for (unsigned int i = 0; i < config->options.size(); i++) {
if (config->options[i].name == "") {
}
}
screensize = 6880;
if ((sockfd = open_g15_daemon())<0)
return -1;
// reserve memory to draw into
offbuff = new char[6880];
*oldConfig = *config;
// clear display
Refresh(true);
syslog(LOG_INFO, "%s: g15daemon initialized.\n", config->name.c_str());
return 0;
}
int cDriverG15daemon::DeInit()
{
if (offbuff);
delete[] offbuff;
if (-1 != sockfd)
close(sockfd);
return 0;
}
int cDriverG15daemon::CheckSetup()
{
if (config->device != oldConfig->device ||
config->port != oldConfig->port ||
config->width != oldConfig->width ||
config->height != oldConfig->height)
{
DeInit();
Init();
return 0;
}
if (config->upsideDown != oldConfig->upsideDown ||
config->invert != oldConfig->invert)
{
oldConfig->upsideDown = config->upsideDown;
oldConfig->invert = config->invert;
return 1;
}
return 0;
}
void cDriverG15daemon::SetPixel(int x, int y)
{
if (x >= width || y >= height)
return;
if (config->upsideDown)
{
x = width - 1 - x;
y = height - 1 - y;
}
offbuff[x + (width * y)] = 1;
}
void cDriverG15daemon::Clear()
{
memset(offbuff, 0, screensize);
}
void cDriverG15daemon::Set8Pixels(int x, int y, unsigned char data)
{
int n;
x &= 0xFFF8;
for (n = 0; n < 8; ++n)
{
if (data & (0x80 >> n)) // if bit is set
SetPixel(x + n, y);
}
}
void cDriverG15daemon::Refresh(bool refreshAll)
{
g15_send(sockfd, offbuff, screensize);
}
} // end of namespace
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