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archived-lcd4linux/drv_X11.c
reinelt bdf3e629a1 [lcd4linux @ 2004-05-25 14:26:28 by reinelt] 
added "Image" driver (was: Raster.c) for PPM and PNG creation
fixed some glitches in the X11 driver

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@430 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
2004-05-25 14:26:29 +00:00

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/* $Id: drv_X11.c,v 1.2 2004/05/25 14:26:29 reinelt Exp $
*
* new style X11 Driver for LCD4Linux
*
* Copyright 1999-2004 Michael Reinelt <reinelt@eunet.at>
* Copyright 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
*
* based on the old XWindow.c which is
* Copyright 2000 Herbert Rosmanith <herp@wildsau.idv.uni-linz.ac.at>
*
* 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_X11.c,v $
* Revision 1.2 2004/05/25 14:26:29 reinelt
*
* added "Image" driver (was: Raster.c) for PPM and PNG creation
* fixed some glitches in the X11 driver
*
* Revision 1.1 2004/02/24 05:55:04 reinelt
*
* X11 driver ported
*
*/
/*
*
* exported fuctions:
*
* struct DRIVER drv_X11
*
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <termios.h>
#include <fcntl.h>
#include <sys/time.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include "debug.h"
#include "cfg.h"
#include "timer.h"
#include "plugin.h"
#include "widget.h"
#include "widget_text.h"
#include "widget_icon.h"
#include "widget_bar.h"
#include "drv.h"
#include "drv_generic_graphic.h"
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif
static char Name[]="X11";
static char *fg_col,*bg_col,*hg_col;
static int pixel = -1; // pointsize in pixel
static int pgap = 0; // gap between points
static int rgap = 0; // row gap between lines
static int cgap = 0; // column gap between characters
static int border = 0; // window border
static int dimx, dimy; // total window dimension in pixel
static unsigned char *drv_X11_FB=NULL;
static Display *dp;
static int sc, dd;
static Window w, rw;
static Visual *vi;
static GC fg_gc, bg_gc, hg_gc;
static Colormap cm;
static XColor fg_xc, bg_xc, hg_xc;
static Pixmap pm;
// ****************************************
// *** hardware dependant functions ***
// ****************************************
static void drv_X11_blit(int row, int col, int height, int width)
{
int r, c;
int dirty = 0;
for (r=row; r<row+height && r<DROWS; r++) {
int y = border + (r/YRES)*rgap + r*(pixel+pgap);
for (c=col; c<col+width && c<DCOLS; c++) {
int x = border + (c/XRES)*cgap + c*(pixel+pgap);
unsigned char p = drv_generic_graphic_FB[r*LCOLS+c];
if (drv_X11_FB[r*DCOLS+c] != p) {
XFillRectangle( dp, w, p? fg_gc:hg_gc, x, y, pixel, pixel);
drv_X11_FB[r*DCOLS+c] = p;
dirty=1;
}
}
}
if (dirty) {
XSync(dp, False);
}
}
static void drv_X11_expose(int x, int y, int width, int height)
{
/*
* theory of operation:
* instead of the old, fully-featured but complicated update
* region calculation, we do an update of the whole display,
* but check before every pixel if the pixel region is inside
* the update region.
*/
int r, c;
int x0, y0;
int x1, y1;
x0 = x-pixel;
x1 = x+pixel+width;
y0 = y-pixel;
y1 = y+pixel+height;
for (r=0; r<DROWS; r++) {
int yc = border + (r/YRES)*rgap + r*(pixel+pgap);
if (yc<y0 || yc>y1) continue;
for (c=0; c<DCOLS; c++) {
int xc = border + (c/XRES)*cgap + c*(pixel+pgap);
if (xc<x0 || xc>x1) continue;
XFillRectangle( dp, w, drv_generic_graphic_FB[r*LCOLS+c]? fg_gc:hg_gc, xc, yc, pixel, pixel);
}
}
XSync(dp, False);
}
static void drv_X11_timer (void *notused)
{
XEvent ev;
if (XCheckWindowEvent(dp, w, ExposureMask, &ev)==0) return;
if (ev.type==Expose) {
drv_X11_expose (ev.xexpose.x, ev.xexpose.y, ev.xexpose.width, ev.xexpose.height);
}
}
static int drv_X11_start (char *section)
{
char *s;
XSetWindowAttributes wa;
XSizeHints sh;
XColor dummy;
XEvent ev;
// read display size from config
if (sscanf(s=cfg_get(section, "Size", "120x32"), "%dx%d", &DCOLS, &DROWS)!=2 || DCOLS<1 || DROWS<1) {
error ("%s: bad %s.Size '%s' from %s", Name, section, s, cfg_source());
free(s);
return -1;
}
free(s);
if (sscanf(s=cfg_get(section, "font", "5x8"), "%dx%d", &XRES, &YRES)!=2 || XRES<1|| YRES<1) {
error ("%s: bad %s.font '%s' from %s", Name, section, s, cfg_source());
free(s);
return -1;
}
free(s);
if (sscanf(s=cfg_get(section, "pixel", "4+1"), "%d+%d", &pixel, &pgap)!=2 || pixel<1 || pgap<0) {
error ("%s: bad %s.pixel '%s' from %s", Name, section, s, cfg_source());
free(s);
return -1;
}
free(s);
if (sscanf(s=cfg_get(section, "gap", "-1x-1"), "%dx%d", &cgap, &rgap)!=2 || cgap<-1 || rgap<-1) {
error ("%s: bad %s.gap '%s' from %s", Name, section, s, cfg_source());
free(s);
return -1;
}
free(s);
if (rgap<0) rgap=pixel+pgap;
if (cgap<0) cgap=pixel+pgap;
if (cfg_number(section, "border", 0, 0, 1000000, &border)<0) return -1;
fg_col = cfg_get(section, "foreground", "#000000");
bg_col = cfg_get(section, "background", "#80d000");
hg_col = cfg_get(section, "halfground", "#70c000");
if (*fg_col=='\\') fg_col++;
if (*bg_col=='\\') bg_col++;
if (*hg_col=='\\') hg_col++;
drv_X11_FB = malloc(DCOLS*DROWS);
if (drv_X11_FB==NULL) {
error ("%s: framebuffer could not be allocated: malloc() failed", Name);
return -1;
}
// init with 255 so all 'halfground' pixels will be drawn
memset(drv_X11_FB, 255, DCOLS*DROWS*sizeof(*drv_X11_FB));
if ((dp=XOpenDisplay(NULL))==NULL) {
error ("%s: can't open display", Name);
return -1;
}
sc = DefaultScreen(dp);
fg_gc = DefaultGC(dp, sc);
vi = DefaultVisual(dp, sc);
dd = DefaultDepth(dp, sc);
rw = DefaultRootWindow(dp);
cm = DefaultColormap(dp, sc);
if (XAllocNamedColor(dp, cm, fg_col, &fg_xc, &dummy) == False) {
error ("%s: can't alloc foreground color '%s'", Name, fg_col);
return -1;
}
if (XAllocNamedColor(dp, cm, bg_col, &bg_xc, &dummy)==False) {
error ("%s: can't alloc background color '%s'", Name, bg_col);
return -1;
}
if (XAllocNamedColor(dp, cm, hg_col, &hg_xc, &dummy)==False) {
error ("%s: can't alloc halfground color '%s'", Name, hg_col);
return -1;
}
dimx = DCOLS*pixel + (DCOLS-1)*pgap + (DCOLS/XRES-1)*cgap;
dimy = DROWS*pixel + (DROWS-1)*pgap + (DROWS/YRES-1)*rgap;
wa.event_mask=ExposureMask;
w = XCreateWindow(dp, rw, 0, 0, dimx+2*border, dimy+2*border, 0, 0, InputOutput, vi, CWEventMask, &wa);
pm = XCreatePixmap(dp, w, dimx, dimy, dd);
sh.min_width = sh.max_width = dimx+2*border;
sh.min_height = sh.max_height = dimy+2*border;
sh.flags = PPosition|PSize|PMinSize|PMaxSize;
XSetWMProperties(dp, w, NULL, NULL, NULL, 0, &sh, NULL, NULL);
XSetForeground(dp, fg_gc, fg_xc.pixel);
XSetBackground(dp, fg_gc, bg_xc.pixel);
bg_gc = XCreateGC(dp, w, 0, NULL);
XSetForeground(dp, bg_gc, bg_xc.pixel);
XSetBackground(dp, bg_gc, fg_xc.pixel);
hg_gc = XCreateGC(dp, w, 0, NULL);
XSetForeground(dp, hg_gc, hg_xc.pixel);
XSetBackground(dp, hg_gc, fg_xc.pixel);
XFillRectangle(dp, pm, bg_gc, 0, 0, dimx+2*border, dimy+2*border);
XSetWindowBackground(dp, w, bg_xc.pixel);
XClearWindow(dp, w);
XStoreName(dp, w, "LCD4Linux");
XMapWindow(dp, w);
XFlush(dp);
while(1) {
XNextEvent(dp,&ev);
if (ev.type==Expose && ev.xexpose.count==0)
break;
}
// regularly process X events
// Fixme: make 20msec configurable
timer_add (drv_X11_timer, NULL, 20, 0);
return 0;
}
// ****************************************
// *** plugins ***
// ****************************************
// none at the moment...
// ****************************************
// *** widget callbacks ***
// ****************************************
// using drv_generic_graphic_draw(W)
// using drv_generic_graphic_icon_draw(W)
// using drv_generic_graphic_bar_draw(W)
// ****************************************
// *** exported functions ***
// ****************************************
// list models
int drv_X11_list (void)
{
printf ("any");
return 0;
}
// initialize driver & display
int drv_X11_init (char *section)
{
WIDGET_CLASS wc;
int ret;
// real worker functions
drv_generic_graphic_real_blit = drv_X11_blit;
// start display
if ((ret=drv_X11_start (section))!=0)
return ret;
// initialize generic graphic driver
if ((ret=drv_generic_graphic_init(section, Name))!=0)
return ret;
// initially expose window
drv_X11_expose (0, 0, dimx+2*border, dimy+2*border);
// register text widget
wc=Widget_Text;
wc.draw=drv_generic_graphic_draw;
widget_register(&wc);
// register icon widget
wc=Widget_Icon;
wc.draw=drv_generic_graphic_icon_draw;
widget_register(&wc);
// register bar widget
wc=Widget_Bar;
wc.draw=drv_generic_graphic_bar_draw;
widget_register(&wc);
// register plugins
// none at the moment...
return 0;
}
// close driver & display
int drv_X11_quit (void) {
info("%s: shutting down.", Name);
drv_generic_graphic_quit();
if (drv_X11_FB) {
free (drv_X11_FB);
drv_X11_FB=NULL;
}
return (0);
}
DRIVER drv_X11 = {
name: Name,
list: drv_X11_list,
init: drv_X11_init,
quit: drv_X11_quit,
};
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