/*
	Replacement screen dump program for AT&T 3B1/7300 to write BMP file.
	David Gesswein djg@pdp8online.com. If called as sprint is puts up a 
	window to ask for file name to write to which is restricted to /tmp 
	to prevent overwriting files as root.

	If called as sdump it dumps to the file name on the command line.


	Based on:
	Replacement screen dump program for AT&T 3B1/7300 for owners of Epson
	compatible 24-pin printers (only tested on the Panasonic KX-P1124.)

	To be installed as /usr/bin/sprint (the program called when
	shift-Print is pressed using UA.)

	Yes, the code could be smaller...but I wanted to save a few cycles.

	Roger M. Shimada	rms@gorf.mn.org -or- rms@gorf.sialis.com
				(Whichever works for you!  :-()
*/

#include <fcntl.h>
#include <kcodes.h>
#include <form.h>
#include <message.h>
#include <stdio.h>
#include <tam.h>
#include <sys/window.h>

#define	SROWS	348
#define	SCOLS	720

#define	SLINE	(SCOLS/16)

char FileName[70];
char FileName2[70];

field_t	Myfield[] = {
        "File Name", 0, 0, 15, 20, F_CLEARIT,
	FileName, NULL, 
	"Select with ENTER, or press CANCEL to bail out",
	NULL, 0,0,0,0,0,
	NULL, NULL, NULL
};

form_t	Myform = {
	"Screen BMP Dump",
	"Screen BMP Dump. File created in /tmp",
	0,
	0,
	0,
	Myfield,
	Myfield
};

                   /* width, height in pixels */
int pf1bit_bmp(char *fn, unsigned long Width, unsigned long Height, 
   unsigned char *bytes); 

char	*Window    = "/dev/window";

unsigned short	Screen[SROWS + 23][SLINE];
unsigned short	BMPScreen[SROWS + 23][SLINE];

static const unsigned char rev_table[] = {
        0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
        0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
        0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
        0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
        0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
        0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
        0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
        0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
        0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
        0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
        0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
        0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
        0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
        0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
        0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
        0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
        0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
        0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
        0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
        0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
        0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
        0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
        0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
        0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
        0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
        0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
        0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
        0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
        0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
        0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
        0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
        0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
    };

int main(int argc, char *argv[])
{
	int		Bytes;
	int		Fd;
	int		I;
	int		Ret;
	int		MenuOp;
	extern int	errno;
	int 		row, col;
	char		*loc;

	Fd = open(Window, O_RDWR);
	if (Fd < 0) {
		fprintf(stderr, "Can't open %s\n", Window);
		exit(errno);
	}
	if (ioctl(Fd, WIOCREAD, Screen) < 0) {
		fprintf(stderr, "Read of screen failed\n");
		exit(errno);
	}
	close(Fd);

	if (strcmp(argv[0], "sprint") == 0) {
		strcpy(FileName, "dump.bmp");

		Fd = open(Window, O_RDWR);
		if (Fd < 0) {
			I = errno;
			fprintf(stderr, "open of %s failed\n", Window);
			exit(I);
		}
		dup(Fd);
		winit();
		keypad(0, 1);
		MenuOp = M_BEGIN | M_INPUT;
		do {
			Ret = form(&Myform, MenuOp);
			MenuOp &= ~M_BEGIN;
			if (Ret < 0) {
				fprintf(stderr,
				"Error %d from form()\n", Ret);
				wexit(127);
			}
			if (Ret == Exit || Ret == Cancl || Ret == Close)
				wexit(126);
		} while (Ret != Enter);
		/* Add /tmp and discard any path to prevent overwriting files
		   as root */
		strcpy(FileName2, FileName);
		strcpy(FileName,"/tmp/");
		/* Allow room for path */
		FileName2[sizeof(FileName2) - 6] = 0;
		loc = strrchr(FileName2, '/');
		if (loc == NULL) {
			strcat(FileName, FileName2);
		} else {
			strcat(FileName, loc+1);
		}
	} else {
		if (argc < 2) {
			printf("Usage sdump filename to dump screen as BMP file\n");
			exit(1);
		}
		strcpy(FileName, argv[1]);
	}
	if (strchr(FileName, '.') == NULL) {
		/* Allow room to add extention */
		FileName[sizeof(FileName) - 5] = 0;
		strcat(FileName,".bmp");
	}
	for (row = 0; row < SROWS; row++) {
		for (col = 0; col < SLINE; col++) {
			/* flip rows and reverse bits in byte */
			BMPScreen[SROWS - row - 1][col] = 
				rev_table[Screen[row][col] & 0xff] << 8 |
				rev_table[Screen[row][col] >> 8];
		}
	}
	pf1bit_bmp(FileName, SCOLS, SROWS, (unsigned char *) BMPScreen);

	wexit(0);
	return 0;
}