/* Copyright (c) 1990 Commodore-Amiga, Inc.
 *
 * This example is provided in electronic form by Commodore-Amiga, Inc. for
 * use with the 1.3 revisions of the Addison-Wesley Amiga reference manuals. 
 * The 1.3 Addison-Wesley Amiga Reference Manual series contains additional
 * information on the correct usage of the techniques and operating system
 * functions presented in this example.  The source and executable code of
 * this example may only be distributed in free electronic form, via bulletin
 * board or as part of a fully non-commercial and freely redistributable
 * diskette.  Both the source and executable code (including comments) must
 * be included, without modification, in any copy.  This example may not be
 * published in printed form or distributed with any commercial product.
 * However, the programming techniques and support routines set forth in
 * this example may be used in the development of original executable
 * software products for Commodore Amiga computers.
 * All other rights reserved.
 * This example is provided "as-is" and is subject to change; no warranties
 * are made.  All use is at your own risk.  No liability or responsibility
 * is assumed.
 */

#include <exec/types.h>
#include <devices/printer.h>
#include <devices/prtbase.h>

#define LMARG	3
#define RMARG	6
#define MARGLEN	8

#define CONDENSED	7
#define PITCH		9
#define QUALITY		17
#define LPI		24
#define INITLEN		26

DoSpecial(command, outputBuffer, vline, currentVMI, crlfFlag, Parms)
char outputBuffer[];
UWORD *command;
BYTE *vline;
BYTE *currentVMI;
BYTE *crlfFlag;
UBYTE Parms[];
{
	extern struct PrinterData *PD;

	int x = 0, y = 0;
	/*
		00-00	\375	wait
		01-03	\033lL	set left margin
		04-06	\033Qq	set right margin
		07-07	\375	wait
	*/
        static char initMarg[MARGLEN] = {0xfd,0x1b,'l','L',0x1b,'Q','q',0xfd}; 
	/*
		00-01	\0335		italics off
		02-04	\033-\000	underline off
		05-06	\033F		boldface off
		07-07	\022		cancel condensed mode
		08-09	\033P		select pica (10 cpi)
		10-12	\033W\000	enlarge off
		13-14	\033H		doublestrike off
		15-17	\033x\000	draft
		18-19	\033T		super/sub script off
		20-22	\033p0		proportional off
		23-24	\0332		6 lpi
		25-25	\015		carriage return
	*/

        static char initThisPrinter[INITLEN] = 
{0x1b,0x05,0x1b,'-',0x0,0x1b,'F',0x12,0x1b,'P',0x1b,'W',0x0,0x1b,'H',
 0x1b,'x',0x0,0x1b,'T',0x1b,'p',0x0,0x1b,0x02,0x0d};
	static BYTE ISOcolorTable[10] = {0, 5, 6, 4, 3, 1, 2, 0};

	if (*command == aRIN) {
		while (x < INITLEN) {
			outputBuffer[x] = initThisPrinter[x];
			x++;
		}

		if (PD->pd_Preferences.PrintQuality == LETTER) {
			outputBuffer[QUALITY] = 1;
		}

		*currentVMI = 36; /* assume 1/6 line spacing (36/216 => 1/6) */
		if (PD->pd_Preferences.PrintSpacing == EIGHT_LPI) {
			outputBuffer[LPI] = '0';
			*currentVMI = 27; /* 27/216 => 1/8 */
		}

		if (PD->pd_Preferences.PrintPitch == ELITE) {
			outputBuffer[PITCH] = 'M';
		}
		else if (PD->pd_Preferences.PrintPitch == FINE) {
			outputBuffer[CONDENSED] = '\017'; /* condensed */
			outputBuffer[PITCH] = 'P'; /* pica condensed */
		}

		Parms[0] = PD->pd_Preferences.PrintLeftMargin;
		Parms[1] = PD->pd_Preferences.PrintRightMargin;
		*command = aSLRM;
	}

	if (*command == aCAM) { /* cancel margins */
		y = PD->pd_Preferences.PaperSize == W_TRACTOR ? 136 : 80;
		if (PD->pd_Preferences.PrintPitch == PICA) {
			Parms[1] = (10 * y) / 10;
		}
		else if (PD->pd_Preferences.PrintPitch == ELITE) {
			Parms[1] = (12 * y) / 10;
		}
		else { /* fine */
			Parms[1] = (17 * y) / 10;
		}
		Parms[0] = 1;
		y = 0;
		*command = aSLRM;
	}

	if (*command == aSLRM) { /* set left and right margins */
		PD->pd_PWaitEnabled = 253;
		if (Parms[0] == 0) {
			initMarg[LMARG] = 0;
		}
		else {
			initMarg[LMARG] = Parms[0] - 1;
		}
		initMarg[RMARG] = Parms[1];
		while (y < MARGLEN) {
			outputBuffer[x++] = initMarg[y++];
		}
		return(x);
	}

	if (*command == aPLU) {
		if (*vline == 0) {
			*vline = 1;
			*command = aSUS2;
			return(0);
		}
		if (*vline < 0) {
			*vline = 0;
			*command = aSUS3;
			return(0);
		}
		return(-1);
	}

	if (*command == aPLD) {
		if (*vline == 0) {
			*vline = -1;
			*command = aSUS4;
			return(0);
		}
		if (*vline > 0) {
			*vline = 0;
			*command = aSUS1;
			return(0);
		}
		return(-1);
	}

	if (*command == aSUS0) {
		*vline = 0;
	}
	if (*command == aSUS1) {
		*vline = 0;
	}
	if (*command == aSUS2) {
		*vline = 1;
	}
	if (*command == aSUS3) {
		*vline = 0;
	}
	if (*command == aSUS4) {
		*vline = -1;
	}

	if (*command == aVERP0) {
		*currentVMI = 27;
	}

	if (*command == aVERP1) {
		*currentVMI = 36;
	}

	if (*command == aIND) { /* lf */
		outputBuffer[x++] = '\033';
		outputBuffer[x++] = 'J';
		outputBuffer[x++] = *currentVMI;
		return(x);
	}

	if (*command == aRI) { /* reverse lf */
		outputBuffer[x++] = '\033';
		outputBuffer[x++] = 'j';
		outputBuffer[x++] = *currentVMI;
		return(x);
	}

	if (*command == aSFC) {
		if (Parms[0] == 39) {
			Parms[0] = 30; /* set defaults */
		}
		if (Parms[0] > 37) {
			return(0); /* ni or background color change */
		}
		outputBuffer[x++] = '\033';
		outputBuffer[x++] = 'r';
		outputBuffer[x++] = ISOcolorTable[Parms[0] - 30];
		/*
		Kludge to get this to work on a CBM_MPS-1250  which interprets
		'ESCr' as go into reverse print mode.  The 'ESCt' tells it to
		get out of reverse print mode.  The 'NULL' is ignored by the
		CBM_MPS-1250 and required by all Epson printers as the
		terminator for the 'ESCtNULL' command which means select
		normal char set (which has no effect).
		*/
		outputBuffer[x++] = '\033';
		outputBuffer[x++] = 't';
		outputBuffer[x++] = 0;
		return(x);
	}

	if (*command == aRIS) {
		PD->pd_PWaitEnabled = 253;
	}

	return(0);
}