549 lines
13 KiB
C
549 lines
13 KiB
C
/*
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* driver.c
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* This file is part of LCDd, the lcdproc server.
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*
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* This file is released under the GNU General Public License. Refer to the
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* COPYING file distributed with this package.
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*
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* Copyright (c) 2001, Joris Robijn
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*
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*
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* This code does all actions on the driver object.
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#ifndef WIN32
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#include <sys/errno.h>
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#include <dlfcn.h>
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#else
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#include <windows.h>
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#endif
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#include <string.h>
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "main.h" /* for timer */
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#include "shared/report.h"
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#include "shared/configfile.h"
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#include "widget.h"
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#include "driver.h"
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#include "drivers.h"
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#include "drivers/lcd.h"
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/* lcd.h is used for the driver API definition */
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typedef struct driver_symbols {
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char *name;
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short offset; /* offset in Driver structure */
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short required;
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} DriverSymbols;
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DriverSymbols driver_symbols[] = {
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{ "api_version", offsetof(Driver, api_version), 1 },
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{ "stay_in_foreground", offsetof(Driver, stay_in_foreground), 1 },
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{ "supports_multiple", offsetof(Driver, supports_multiple), 1 },
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{ "symbol_prefix", offsetof(Driver, symbol_prefix), 1 },
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{ "init", offsetof(Driver, init), 1 },
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{ "close", offsetof(Driver, close), 1 },
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{ "width", offsetof(Driver, width), 0 },
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{ "height", offsetof(Driver, height), 0 },
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{ "clear", offsetof(Driver, clear), 0 },
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{ "flush", offsetof(Driver, flush), 0 },
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{ "string", offsetof(Driver, string), 0 },
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{ "chr", offsetof(Driver, chr), 0 },
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{ "vbar", offsetof(Driver, vbar), 0 },
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{ "hbar", offsetof(Driver, hbar), 0 },
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{ "num", offsetof(Driver, num), 0 },
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{ "heartbeat", offsetof(Driver, heartbeat), 0 },
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{ "icon", offsetof(Driver, icon), 0 },
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{ "cursor", offsetof(Driver, cursor), 0 },
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{ "set_char", offsetof(Driver, set_char), 0 },
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{ "get_free_chars", offsetof(Driver, get_free_chars), 0 },
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{ "cellwidth", offsetof(Driver, cellwidth), 0 },
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{ "cellheight", offsetof(Driver, cellheight), 0 },
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{ "get_contrast", offsetof(Driver, get_contrast), 0 },
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{ "set_contrast", offsetof(Driver, set_contrast), 0 },
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{ "get_brightness", offsetof(Driver, get_brightness), 0 },
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{ "set_brightness", offsetof(Driver, set_brightness), 0 },
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{ "backlight", offsetof(Driver, backlight), 0 },
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{ "output", offsetof(Driver, output), 0 },
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{ "get_key", offsetof(Driver, get_key), 0 },
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{ "get_info", offsetof(Driver, get_info), 0 },
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{ NULL, 0, 0 }
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};
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/* Functions for the driver */
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static int request_display_width();
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static int request_display_height();
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static int driver_store_private_ptr(Driver * driver, void * private_data);
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Driver *
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driver_load( char * name, char * filename )
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{
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Driver * driver = NULL;
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int res;
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report( RPT_DEBUG, "%s( name=\"%.40s\", filename=\"%.80s\")", __FUNCTION__, name, filename );
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/* Allocate memory for new driver struct */
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driver = malloc( sizeof( Driver ));
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memset( driver, 0, sizeof (Driver));
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/* And store its name and filename */
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driver->name = malloc( strlen( name ) + 1 );
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strcpy( driver->name, name );
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driver->filename = malloc( strlen( filename ) + 1 );
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strcpy( driver->filename, filename );
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/* Load and bind the driver module and locate the symbols */
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if( driver_bind_module( driver ) < 0 ) {
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report( RPT_ERR, "Driver [%.40s] binding failed", name );
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free( driver->name );
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free( driver->filename );
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free( driver );
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return NULL;
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}
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/* Check module version */
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if( strcmp( *(driver->api_version), API_VERSION ) != 0 ) {
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report( RPT_ERR, "Driver [%.40s] is of an incompatible version", name );
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driver_unbind_module( driver );
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free( driver->name );
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free( driver->filename );
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free( driver );
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return NULL;
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}
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/* Call the init function */
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debug( RPT_DEBUG, "%s: Calling driver [%.40s] init function", __FUNCTION__, driver->name );
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res = driver->init( driver );
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if( res < 0 ) {
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report( RPT_ERR, "Driver [%.40s] init failed, return code < 0", driver->name );
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/* Driver load failed, driver should not be added to list
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* Free driver structure again
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*/
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driver_unbind_module( driver );
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free( driver->name );
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free( driver->filename );
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free( driver );
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return NULL;
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}
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debug( RPT_NOTICE, "Driver [%.40s] loaded", driver->name );
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return driver;
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}
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int
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driver_unload( Driver * driver )
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{
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debug( RPT_NOTICE, "Closing driver [%.40s]", driver->name );
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if( driver->close )
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driver->close (driver);
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/* Unlaod the module */
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driver_unbind_module( driver );
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/* Free its data */
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free( driver->filename );
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free( driver->name );
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free( driver );
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debug( RPT_DEBUG, "%s: Driver unloaded", __FUNCTION__ );
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return 0;
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}
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int
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driver_bind_module( Driver * driver )
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{
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int i;
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int missing_symbols = 0;
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debug( RPT_DEBUG, "%s( driver=[%.40s] )", __FUNCTION__, driver->name );
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/* Load the module */
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#ifndef WIN32
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driver->module_handle = dlopen( driver->filename, RTLD_NOW );
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#else
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driver->module_handle = LoadLibraryEx( (driver->filename), NULL, 0 );
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#endif
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if( driver->module_handle == NULL ) {
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#ifndef WIN32
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report( RPT_ERR, "Could not open driver module %.40s: %s", driver->filename, dlerror() );
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#else
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/* REVISIT: replace dlerror() */
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report( RPT_ERR, "Could not open driver module %.40s.", driver->filename );
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#endif
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return -1;
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}
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/* And locate the symbols */
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for( i=0; driver_symbols[i].name; i++ ) {
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void (**p)();
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p = (void(**)() ) ((size_t)driver + (driver_symbols[i].offset));
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*p = NULL;
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/* Add the symbol_prefix */
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if( driver->symbol_prefix ) {
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char *s = malloc( strlen( *(driver->symbol_prefix) ) + strlen( driver_symbols[i].name ) + 1 );
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strcpy( s, *(driver->symbol_prefix) ) ;
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strcat( s, driver_symbols[i].name );
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debug( RPT_DEBUG, "%s: finding symbol: %s", __FUNCTION__, s );
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#ifndef WIN32
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*p = dlsym( driver->module_handle, s );
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#else
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*p = (void(*)()) (GetProcAddress( driver->module_handle, s ));
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#endif
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free( s );
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}
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/* Retrieve the symbol */
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if( !*p ) {
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debug( RPT_DEBUG, "%s: finding symbol: %s", __FUNCTION__, driver_symbols[i].name );
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#ifndef WIN32
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*p = dlsym( driver->module_handle, driver_symbols[i].name );
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#else
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*p = (void(*)()) (GetProcAddress( driver->module_handle, driver_symbols[i].name ));
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#endif
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}
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if( *p ) {
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debug( RPT_DEBUG, "%s: found symbol at: %p", __FUNCTION__, *p );
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}
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/* Was the symbol required but not found ? */
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if( !*p && driver_symbols[i].required ) {
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report( RPT_ERR, "Driver [%.40s] does not have required symbol: %s", driver->name, driver_symbols[i].name );
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missing_symbols = 1;
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}
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}
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/* If errors, leave now while we can :) */
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if( missing_symbols ) {
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report( RPT_ERR, "Driver [%.40s] does not have all obligatory symbols", driver->name );
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#ifndef WIN32
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dlclose( driver->module_handle );
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#else
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FreeLibrary( driver->module_handle );
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#endif
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return -1;
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}
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/* Add our exported functions */
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/* Config file functions */
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driver->config_get_bool = config_get_bool;
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driver->config_get_int = config_get_int;
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driver->config_get_float = config_get_float;
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driver->config_get_string = config_get_string;
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driver->config_has_section = config_has_section;
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driver->config_has_key = config_has_key;
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/* Reporting */
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driver->report = report;
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/* Driver private data */
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driver->store_private_ptr = driver_store_private_ptr;
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/* Display size request */
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driver->request_display_width = request_display_width;
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driver->request_display_height = request_display_height;
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return 0;
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}
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int
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driver_unbind_module( Driver * driver )
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{
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debug( RPT_DEBUG, "%s( driver=[%.40s] )", __FUNCTION__, driver->name );
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#ifndef WIN32
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dlclose( driver->module_handle );
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#else
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FreeLibrary( driver->module_handle );
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#endif
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return 0;
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}
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bool
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driver_does_output( Driver * driver )
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{
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return (driver->width != NULL
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|| driver->height != NULL
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|| driver->clear != NULL
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|| driver->string != NULL
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|| driver->chr != NULL ) ? 1 : 0;
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}
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bool
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driver_does_input( Driver * driver )
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{
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return (driver->getkey != NULL
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|| driver->get_key != NULL ) ? 1 : 0;
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}
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bool
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driver_stay_in_foreground( Driver * driver )
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{
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return *driver->stay_in_foreground;
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}
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bool
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driver_supports_multiple( Driver * driver )
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{
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return *driver->supports_multiple;
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}
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static int
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driver_store_private_ptr(Driver * driver, void * private_data)
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{
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debug( RPT_DEBUG, "%s( driver=[%.40s], ptr=%p )", __FUNCTION__, driver->name, private_data );
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driver->private_data = private_data;
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return 0;
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}
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static int
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request_display_width()
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{
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if( !display_props )
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return 0;
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return display_props->width;
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}
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static int
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request_display_height()
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{
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if( !display_props )
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return 0;
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return display_props->height;
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}
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void
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driver_alt_vbar( Driver * drv, int x, int y, int len, int promille, int pattern )
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{
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int pos;
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debug (RPT_DEBUG, "%s( drv=[%.40s], x=%d, y=%d, len=%d, promille=%d, pattern=%d )", __FUNCTION__, drv->name, x, y, len, promille, pattern);
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if (!drv->chr)
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return;
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for ( pos=0; pos<len; pos++ ) {
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if( 2 * pos < ((long) promille * len / 500 + 1) ) {
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drv->chr (drv, x, y-pos, '|');
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} else {
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; /* print nothing */
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}
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}
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}
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void
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driver_alt_hbar( Driver * drv, int x, int y, int len, int promille, int pattern )
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{
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int pos;
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debug (RPT_DEBUG, "%s( drv=[%.40s], x=%d, y=%d, len=%d, promille=%d, pattern=%d )", __FUNCTION__, drv->name, x, y, len, promille, pattern);
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if (!drv->chr)
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return;
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for ( pos=0; pos<len; pos++ ) {
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if( 2 * pos < ((long) promille * len / 500 + 1) ) {
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drv->chr (drv, x+pos, y, '-');
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} else {
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; /* print nothing */
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}
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}
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}
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void
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driver_alt_num( Driver * drv, int x, int num )
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{
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/* Ugly code extracted by David GLAUDE from lcdm001.c ;)*/
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/* Moved to driver.c by Joris Robijn */
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static char num_map[][4][4] = {
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{ /* 0 */
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" _ ",
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"| |",
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"|_|",
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" " },
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{ /* 1 */
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" ",
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" |",
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" |",
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" " },
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{ /* 2 */
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" _ ",
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" _|",
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"|_ ",
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" " },
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{ /* 3 */
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" _ ",
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" _|",
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" _|",
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" " },
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{ /* 4 */
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" ",
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"|_|",
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" |",
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" " },
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{ /* 5 */
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" _ ",
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"|_ ",
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" _|",
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" " },
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{ /* 6 */
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" _ ",
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"|_ ",
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"|_|",
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" " },
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{ /* 7 */
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" _ ",
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" |",
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" |",
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" " },
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{ /* 8 */
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" _ ",
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"|_|",
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"|_|",
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" " },
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{ /* 9 */
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" _ ",
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"|_|",
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" _|",
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" " },
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{ /* colon */
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" ",
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".",
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".",
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" " }
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};
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/* End of ugly code ;) by Rene Wagner */
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/* I like this code ! Joris */
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int y, dx;
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debug (RPT_DEBUG, "%s( drv=[%.40s], x=%d, num=%d )", __FUNCTION__, drv->name, x, num);
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if ((num < 0) || (num > 10))
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return;
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if (!drv->chr)
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return;
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for (y = 0; y < 4; y++)
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for (dx = 0; num_map[num][y][dx] != '\0'; dx++)
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drv->chr (drv, x + dx, y+1, num_map[num][y][dx]);
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}
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void
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driver_alt_heartbeat( Driver * drv, int state )
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{
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int icon;
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debug (RPT_DEBUG, "%s( drv=[%.40s], state=%d )", __FUNCTION__, drv->name, state);
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if (state == HEARTBEAT_OFF)
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return;
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/* Don't display anything */
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if (!drv->width)
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return;
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/* Hmm, is this a good method ?
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* Or should we use clock() ? Or ftime ? Or gettimeofday ?
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*/
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icon = (timer & 5) ? ICON_HEART_FILLED : ICON_HEART_OPEN;
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if (drv->icon)
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drv->icon( drv, drv->width(drv), 1, icon);
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else
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driver_alt_icon( drv, drv->width(drv), 1, icon);
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}
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void
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driver_alt_icon( Driver * drv, int x, int y, int icon )
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{
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char ch1 = '?';
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char ch2 = 0;
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debug (RPT_DEBUG, "%s( drv=[%.40s], x=%d, y=%d, icon=ICON_%s )", __FUNCTION__, drv->name, x, y, widget_icon_to_iconname (icon) );
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if (!drv->chr)
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return;
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switch (icon) {
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case ICON_BLOCK_FILLED: ch1 = '#'; break;
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case ICON_HEART_OPEN: ch1 = '-'; break;
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case ICON_HEART_FILLED: ch1 = '#'; break;
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case ICON_ARROW_UP: ch1 = '^'; break;
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case ICON_ARROW_DOWN: ch1 = 'v'; break;
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case ICON_ARROW_LEFT: ch1 = '<'; break;
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case ICON_ARROW_RIGHT: ch1 = '>'; break;
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case ICON_CHECKBOX_OFF: ch1 = 'N'; break;
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case ICON_CHECKBOX_ON: ch1 = 'Y'; break;
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case ICON_CHECKBOX_GRAY: ch1 = 'o'; break;
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case ICON_SELECTOR_AT_LEFT: ch1 = '>'; break;
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case ICON_SELECTOR_AT_RIGHT: ch1 = '<'; break;
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case ICON_ELLIPSIS: ch1 = '_'; break;
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case ICON_STOP: ch1 = '['; ch2 = ']'; break;
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case ICON_PAUSE: ch1 = '|'; ch2 = '|'; break;
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case ICON_PLAY: ch1 = '>'; ch2 = ' '; break;
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case ICON_PLAYR: ch1 = '<'; ch2 = ' '; break;
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case ICON_FF: ch1 = '>'; ch2 = '>'; break;
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case ICON_FR: ch1 = '<'; ch2 = '<'; break;
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case ICON_NEXT: ch1 = '>'; ch2 = '|'; break;
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case ICON_PREV: ch1 = '|'; ch2 = '<'; break;
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case ICON_REC: ch1 = '('; ch2 = ')'; break;
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}
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drv->chr( drv, x, y, ch1);
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if (ch2)
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drv->chr( drv, x+1, y, ch2);
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}
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void driver_alt_cursor( Driver * drv, int x, int y, int state )
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{
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/* Same question about timer in this function... */
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debug (RPT_DEBUG, "%s( drv=[%.40s], x=%d, y=%d, state=%d )", __FUNCTION__, drv->name, x, y, state);
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switch( state ) {
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case CURSOR_BLOCK:
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case CURSOR_DEFAULT_ON:
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if (timer & 2 && drv->chr) {
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if (drv->icon) {
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drv->icon( drv, x, y, ICON_BLOCK_FILLED);
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} else {
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driver_alt_icon( drv, x, y, ICON_BLOCK_FILLED );
|
|
}
|
|
}
|
|
break;
|
|
case CURSOR_UNDER:
|
|
if (timer & 2 && drv->chr) {
|
|
drv->chr( drv, x, y, '_');
|
|
}
|
|
break;
|
|
}
|
|
|
|
}
|