/* * $Id: linux.trm,v 1.12 1995/12/20 21:47:58 drd Exp $ * */ /* GNUPLOT - linux.trm */ /* * Copyright (C) 1993 * * Permission to use, copy, and distribute this software and its * documentation for any purpose with or without fee is hereby granted, * provided that the above copyright notice appear in all copies and * that both that copyright notice and this permission notice appear * in supporting documentation. * * Permission to modify the software is granted, but not the right to * distribute the modified code. Modifications are to be distributed * as patches to released version. * * This software is provided "as is" without express or implied warranty. * * This file is included by ../term.c. * * This terminal driver supports: * SVGA up to 1024x768x256 for PC's running the Linux Operating System * (also VGA 640x480x16, and SVGA 800x600x256) * * AUTHOR * Scott Heavner (sdh@po.cwru.edu) * based on original linux.trm by Tommy Frandsen (frandsen@diku.dk) * patched by David J. Liu (liu@molecule.phri.nyu.edu) * to increase perfromance and safety based on the features of SVGALib/GL. * send your comments or suggestions to (pixar!info-gnuplot@sun.com). */ /* * Compile with Linux SVGAlib 0.95 currently maintained by * Harm Hanemaayer (hhanemaa@cs.ruu.nl). * supports Trident, Tseng, Cirrus, Oak and generic vga. */ #ifndef GOT_DRIVER_H #include "driver.h" #endif #ifdef TERM_REGISTER register_term(linux) #endif #ifdef TERM_PROTO #define LINUX_VCHAR FNT5X9_VCHAR #define LINUX_HCHAR FNT5X9_HCHAR #define LINUX_VTIC 5 #define LINUX_HTIC 5 #define LINUX_XMAX 0 /* These two entries are just place holders. */ #define LINUX_YMAX 0 /* The actual values will be filled in init. */ TERM_PUBLIC void LINUX_options __P((void)); TERM_PUBLIC void LINUX_init __P((void)); TERM_PUBLIC void LINUX_reset __P((void)); TERM_PUBLIC void LINUX_text __P((void)); TERM_PUBLIC void LINUX_graphics __P((void)); TERM_PUBLIC void LINUX_linetype __P((int linetype)); TERM_PUBLIC void LINUX_move __P((unsigned int x,unsigned int y)); TERM_PUBLIC void LINUX_vector __P((unsigned int x,unsigned int y)); TERM_PUBLIC int LINUX_text_angle __P((int ang)); TERM_PUBLIC void LINUX_put_text __P((unsigned int x,unsigned int y,char *str)); TERM_PUBLIC void LINUX_suspend __P((void)); TERM_PUBLIC void LINUX_resume __P((void)); #endif #ifdef TERM_BODY #define _STRING_H_ #include static int linux_vmode = G1024x768x256; /* default mode */ static int vgacolor[] = {7,8,2,3,4,5,9,14,12,15,13,10,11,1,6}; static int graphics_on = FALSE; vga_modeinfo *modeinfo; static int linux_startx, linux_starty, linux_lasty; static int linux_angle; int LINUX_graphics_allowed; static void LINUX_putc __P((unsigned int x,unsigned int y,int c,int ang,FUNC_PTR line_func)); /* this function is called at the very beginning of main() to initialize the vgalib and to revoke suid privileges. /dev/console and /dev/tty\d are considered graphic terminals, all other don't support the linux terminal */ void LINUX_setup(void) { char line[256]; FILE *pipe; LINUX_graphics_allowed=FALSE; if(geteuid()!=0) return; /* if we aren't root, we cannot init graphics */ if((pipe=popen("/usr/bin/tty","r"))!=NULL) { line[0]=0; fgets(line,256, pipe); pclose(pipe); line[strlen(line)-1]='\0'; if(strcmp(line,"/dev/console")==0 || (strncmp(line, "/dev/tty", 8)==0 && isdigit(line[8]))) LINUX_graphics_allowed=TRUE; } if(LINUX_graphics_allowed) { vga_init(); } else { /* err - shouldn't we give up root uid whatever happens ? * or perhaps vga_init() does it ? */ setuid(getuid()); } } TERM_PUBLIC void LINUX_options() { if(!LINUX_graphics_allowed) { int_error("Linux terminal driver not available", NO_CARET); } fprintf (stderr, "%s\n",vga_getmodename(linux_vmode)) ; } TERM_PUBLIC void LINUX_init() { /* vga_init () has been moved to immediately after main () for security */ if (vga_getdefaultmode()!=-1) linux_vmode=vga_getdefaultmode(); /* get the default mode from GSVGAMODE, if available */ if (!vga_hasmode(linux_vmode)) linux_vmode = G640x480x16; /* test default mode first */ if (!vga_hasmode(linux_vmode)) { fprintf (stderr,"Error, unable to initiate graphics.\n") ; return; } /* this mode is the bottom line */ modeinfo = vga_getmodeinfo(linux_vmode); term->xmax = modeinfo->width; term->ymax = modeinfo->height; linux_lasty = modeinfo->height-1; } TERM_PUBLIC void LINUX_reset() { if (graphics_on) { vga_setmode(TEXT); graphics_on = FALSE; } } TERM_PUBLIC void LINUX_text() { if (graphics_on) { vga_getch(); vga_setmode(TEXT); graphics_on = FALSE; } } TERM_PUBLIC void LINUX_graphics() { if (!graphics_on) { vga_setmode(linux_vmode); graphics_on = TRUE; } } TERM_PUBLIC void LINUX_suspend() { vga_flip(); } TERM_PUBLIC void LINUX_resume() { vga_flip(); } TERM_PUBLIC void LINUX_linetype(linetype) int linetype; { if (linetype >= 13) linetype %= 13; vga_setcolor(vgacolor[linetype+2]); } TERM_PUBLIC void LINUX_move(x,y) unsigned int x; unsigned int y; { linux_startx = x; linux_starty = y; } TERM_PUBLIC void LINUX_vector(x,y) unsigned int x; unsigned int y; { vga_drawline(linux_startx,linux_lasty-linux_starty,x,linux_lasty-y); linux_startx = x; linux_starty = y; } TERM_PUBLIC int LINUX_text_angle(ang) int ang; { linux_angle=ang; return TRUE; } static void LINUX_putc(x,y,c,ang,line_func) unsigned int x,y; int c; int ang; FUNC_PTR line_func; { int i, j, k; unsigned int pixelon; i = (int)(c) - 32; for (j=0; j> k & 1); if (pixelon) { switch(ang) { case 0 : (*line_func)(x+k+1,y-j,x+k+1,y-j); break; case 1 : (*line_func)(x-j,y-k-1,x-j,y-k-1); break; } } } } } TERM_PUBLIC void LINUX_put_text(x,y,str) unsigned int x, y; char *str; { int i; switch(linux_angle) { case 0 : y -= LINUX_VCHAR/2; break; case 1 : x += LINUX_VCHAR/2; break; } for (i=0;str[i];i++) { LINUX_putc(x,linux_lasty-y,str[i],linux_angle,vga_drawline); switch(linux_angle) { case 0 : x+=LINUX_HCHAR ; break; case 1 : y+=LINUX_HCHAR ; break; } } } #endif #ifdef TERM_TABLE TERM_TABLE_START(linux_driver) "linux", "Linux PC with (s)vgalib", LINUX_XMAX, LINUX_YMAX, LINUX_VCHAR, LINUX_HCHAR, LINUX_VTIC, LINUX_HTIC, LINUX_options, LINUX_init, LINUX_reset, LINUX_text, null_scale, LINUX_graphics, LINUX_move, LINUX_vector, LINUX_linetype, LINUX_put_text, LINUX_text_angle, null_justify_text, do_point, do_arrow, set_font_null, 0, /* pointsize */ TERM_CAN_MULTIPLOT, LINUX_suspend, LINUX_resume TERM_TABLE_END(linux_driver) #undef LAST_TERM #define LAST_TERM linux_driver #endif #ifdef TERM_HELP START_HELP(linux) "1 linux", "?set terminal linux", "?linux", " The Linux driver has no additional options to specify. It looks at the", " environment variable GSVGAMODE for the default mode; if not set, it uses", " 1024x768x256 as default mode or, if that is not possible, 640x480x16", " (standard VGA).", "", " Syntax:", " set terminal linux" END_HELP(linux) #endif