diff options
Diffstat (limited to 'glcddrivers/g15daemon.c')
| -rw-r--r-- | glcddrivers/g15daemon.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/glcddrivers/g15daemon.c b/glcddrivers/g15daemon.c new file mode 100644 index 0000000..f041b29 --- /dev/null +++ b/glcddrivers/g15daemon.c @@ -0,0 +1,219 @@ +/* +* 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 |