[lcd4linux @ 2004-01-20 04:51:39 by reinelt]

moved generic stuff from drv_MatrixOrbital to drv_generic
implemented new-stylish bars which are nearly finished

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@321 3ae390bd-cb1e-0410-b409-cd5a39f66f1f

1 files changed, 292 insertions, 0 deletions

diff --git a/drv_generic.c b/drv_generic.c
new file mode 100644
index 0000000..3375254
--- /dev/null
+++ b/drv_generic.c
@@ -0,0 +1,292 @@
+/* $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);
+}