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-rw-r--r--drv_generic.c292
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+/* $Id: drv_generic.c,v 1.1 2004/01/20 04:51:39 reinelt Exp $
+ *
+ * generic driver helper for text- and graphic-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.c,v $
+ * Revision 1.1 2004/01/20 04:51:39 reinelt
+ * moved generic stuff from drv_MatrixOrbital to drv_generic
+ * implemented new-stylish bars which are nearly finished
+ *
+ */
+
+/*
+ *
+ * exported fuctions:
+ *
+ * Fixme: document me!
+ *
+ */
+
+#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 "lock.h"
+#include "widget.h"
+#include "widget_text.h"
+#include "widget_bar.h"
+#include "drv.h"
+#include "drv_generic.h"
+
+
+static char *Driver;
+static char *Port;
+static speed_t Speed;
+static int Device=-1;
+
+
+int DROWS, DCOLS; // display size
+int LROWS, LCOLS; // layout size
+int XRES, YRES; // pixels of one char cell
+int CHARS; // number of user-defineable characters
+
+
+char *LayoutFB = NULL;
+char *DisplayFB = NULL;
+
+
+int drv_generic_serial_open (char *driver, char *port, speed_t speed)
+{
+ int fd;
+ pid_t pid;
+ struct termios portset;
+
+ Driver = driver;
+ Port = port;
+ Speed = speed;
+
+ if ((pid=lock_port(port))!=0) {
+ if (pid==-1)
+ error ("%s: port %s could not be locked", Driver, Port);
+ else
+ error ("%s: port %s is locked by process %d", Driver, Port, pid);
+ return -1;
+ }
+
+ fd = open(Port, O_RDWR | O_NOCTTY | O_NDELAY);
+ if (fd==-1) {
+ error ("%s: open(%s) failed: %s", Driver, Port, strerror(errno));
+ unlock_port(Port);
+ return -1;
+ }
+
+ if (tcgetattr(fd, &portset)==-1) {
+ error ("%s: tcgetattr(%s) failed: %s", Driver, Port, strerror(errno));
+ unlock_port(Port);
+ return -1;
+ }
+
+ cfmakeraw(&portset);
+ cfsetospeed(&portset, Speed);
+ if (tcsetattr(fd, TCSANOW, &portset)==-1) {
+ error ("%s: tcsetattr(%s) failed: %s", Driver, Port, strerror(errno));
+ unlock_port(Port);
+ return -1;
+ }
+
+ Device=fd;
+ return Device;
+}
+
+
+int drv_generic_serial_read (char *string, int len)
+{
+ int run, ret;
+
+ if (Device==-1) return -1;
+ for (run=0; run<10; run++) {
+ ret=read (Device, string, len);
+ if (ret>=0 || errno!=EAGAIN) break;
+ debug ("read(): EAGAIN");
+ usleep(1000);
+ }
+
+ if (ret<0) {
+ error("%s: read(%s, %d) failed: %s", Driver, Port, len, strerror(errno));
+ } else if (ret!=len) {
+ error ("%s: partial read: len=%d ret=%d", Driver, len, ret);
+ }
+
+ return ret;
+}
+
+
+void drv_generic_serial_write (char *string, int len)
+{
+ int run, ret;
+
+ if (Device==-1) return;
+ for (run=0; run<10; run++) {
+ ret=write (Device, string, len);
+ if (ret>=0 || errno!=EAGAIN) break;
+ debug ("write(): EAGAIN");
+ usleep(1000);
+ }
+
+ if (ret<0) {
+ error ("MatrixOrbital: write(%s) failed: %s", Port, strerror(errno));
+ } else if (ret!=len) {
+ error ("MatrixOrbital: partial write: len=%d ret=%d", len, ret);
+ }
+
+ return;
+}
+
+
+int drv_generic_serial_close (void)
+{
+ debug ("%s: closing port %s", Driver, Port);
+ close (Device);
+ unlock_port(Port);
+ return 0;
+}
+
+
+void drv_generic_text_resizeFB (int rows, int cols)
+{
+ char *newFB;
+ int row, col;
+
+ // Fixme: resize Bar FB too!!!!
+
+
+ // Layout FB is large enough
+ if (rows<=LROWS && cols<=LCOLS)
+ return;
+
+ // 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;
+ LCOLS = cols;
+ LROWS = rows;
+}
+
+
+
+// ****************************************
+// *** widget callbacks ***
+// ****************************************
+
+
+int drv_generic_text_draw_text (WIDGET *W, int goto_len,
+ void (*drv_goto)(int row, int col),
+ void (*drv_write)(char *buffer, int len))
+{
+ WIDGET_TEXT *T=W->data;
+ char *txt, *fb1, *fb2;
+ int row, col, len, end;
+
+ row=W->row;
+ col=W->col;
+ txt=T->buffer;
+ len=strlen(txt);
+ end=col+len;
+
+ // maybe grow layout framebuffer
+ drv_generic_text_resizeFB (row, col+len-1);
+
+ fb1 = LayoutFB + row*LCOLS;
+ fb2 = DisplayFB + row*DCOLS;
+
+ // transfer new text into layout buffer
+ memcpy (fb1+col, txt, len);
+
+ for (; col<=end; col++) {
+ int pos1, pos2, equal;
+ if (fb1[col]==fb2[col]) continue;
+ drv_goto (row, col);
+ for (pos1=col, pos2=pos1, col++, equal=0; col<=end; 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_len) break;
+ } else {
+ pos2=col;
+ equal=0;
+ }
+ }
+ memcpy (fb2+pos1, fb1+pos1, pos2-pos1+1);
+ drv_write (fb2+pos1, pos2-pos1+1);
+ }
+
+ return 0;
+}
+
+
+// initialize text driver
+int drv_generic_text_init (char *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;
+}
+
+
+// close driver
+int drv_generic_quit (void) {
+
+ if (LayoutFB) {
+ free(LayoutFB);
+ LayoutFB=NULL;
+ }
+
+ if (DisplayFB) {
+ free(DisplayFB);
+ DisplayFB=NULL;
+ }
+
+ return (0);
+}
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