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mcprint.c
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C/C++ Source or Header
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1994-03-18
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12KB
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456 lines
/*
* MICROCAD Print Utility
*
* Copyright 1992-1994 Dave Dunfield
* All rights reserved.
*
* Permission granted for personal (non-commercial) use only.
*
* Compile command: cc mcprint -fop
*/
#include <stdio.h>
/* Screen dimensions */
#define VERTICAL 480 /* Maximum screen height */
#define HORIZONTAL 640 /* Maximum screen width */
#define BUFSIZE 38400 /* Size of video buffer */
#define ARC_RES 64 /* Resolution of each ARC quadrant */
#define PBYTES 11 /* # of prefix bytes */
/* Drawing buffer codes */
#define LINE 0x01 /* Object is a LINE */
#define BOX 0x02 /* Object is a BOX */
#define CIRCLE 0x03 /* Object is a CIRCLE */
#define TEXT 0x04 /* Object is a TEXT string */
#define ARC 0x05 /* Object is an ARC */
#define GROUP 0x06 /* Object is a GROUP of objects */
#define ACOPY 0x07 /* Copy an object (absolute) */
#define RCOPY 0x08 /* Copy an object (relative) */
/* Drawing storage variables */
unsigned char drawing[32000];
unsigned dpos;
/* Misc. variables */
char font[4608], dfile[65], ffile[65], *device = "LPT1";
int vbseg, printer = -1;
/*
* Printer information: The variable 'printers' contains the names of
* All supported printer types. To add a new printer, add its name to
* this list, add its 'xyorder' flag to the 'xyorders' variable below,
* and add code to the 'switch' statement at the end of 'main()' to
* output the drawing.
*/
char *printers[] = {
"LASERJET",
"EPSON" }
/*
* The 'xyorder' flag controls how the bitmap image is generated.
*
* If xyorder is non-zero, the bitmap will be organized such that each
* byte contains bits from the same COLUMN. This is suitable for direct
* output to a "raster" type printer such as the LaserJet.
*
* If xyorder is zero, the bitmap will be organized such that each
* byte contains bits from the same ROW. This is suitable for
* direct output to a "dot matrix" type printer such as the EPSON.
*
* NOTE: The terms COLUMN and ROW are used with reference to the drawing,
* which is printed SIDEWAYS. Therefore, the terms are reversed with
* respect to the physical page layout of the printer.
*/
char xyorder, xyorders[] = {
-1, /* Laserjet uses COLUMN alignment */
0 } /* EPSON uses ROW alignment */
/*
* Sine table for drawing ARC's
*/
unsigned sine[] = {
0, 1608, 3216, 4821, 6424, 8022, 9616, 11204,
12785, 14359, 15924, 17479, 19024, 20557, 22078, 23586,
25079, 26557, 28020, 29465, 30893, 32302, 33692, 35062,
36410, 37736, 39040, 40320, 41575, 42806, 44011, 45190,
46341, 47464, 48559, 49624, 50660, 51665, 52639, 53581,
54491, 55368, 56212, 57022, 57797, 58538, 59243, 59913,
60547, 61144, 61705, 62228, 62714, 63162, 63571, 63943,
64276, 64571, 64826, 65043, 65220, 65358, 65457, 65516 };
/*
* Main program - process commands at the highest level
*/
main(argc, argv)
int argc;
char *argv[];
{
unsigned i, j;
char *ptr;
FILE *fp, *pfp;
/* Set default file names */
*dfile = 0;
concat(ffile, "MICROCAD.FNT");
/* Parse command line arguments */
for(i=1; i < argc; ++i) {
ptr = argv[i];
switch((toupper(*ptr++) << 8) | toupper(*ptr++)) {
case 'F=' : /* Specify alternate FONT file */
concat(ffile, ptr, ".FNT");
break;
case 'D=' : /* Specify output device */
device = ptr;
break;
case '?' << 8: /* Command line help */
case '/?' :
case '-?' :
goto help;
default: /* Assume drawing filename or printer*/
if(!*dfile) { /* Need filename? */
concat(dfile, argv[i], ".DWG");
break; }
for(ptr = argv[i]; *ptr; ++ptr) /* Insure name uppercase */
*ptr = toupper(*ptr);
for(j=0; j < (sizeof(printers)/2); ++j) { /* Lookup name */
if(strbeg(printers[j], argv[i])) {
if(printer != -1) {
printf("Ambiguous printer name!\n");
goto help; }
printer = j; } }
if(printer == -1) {
printf("Unknown printer name!\n");
goto help; } } }
/* If insufficent parameters, or help request... output info */
if((printer == -1) || !*dfile) {
printf("Drawing name and printer type required!\n");
help:
printf("\nUse: MCPRINT <drawing file> <printer type> [F=font file] [D=device]\n");
printf("\nCopyright 1992-1994 Dave Dunfield\nAll rights reserved.\n\n");
printf("Available printers are:\n");
for(j=0; j < (sizeof(printers)/2); ++j)
printf(" %s\n", printers[j]);
exit(-1); }
/* Read in "font" file */
fp = fopen(ffile, "rbvq");
fread(font, sizeof(font), fp);
fclose(fp);
/* Read in the drawing file */
fp = fopen(dfile, "rbvq");
fread(drawing, PBYTES, fp);
i = fread(drawing, sizeof(drawing), fp);
fclose(fp);
/* Zero unused portion of drawing file */
while(i < sizeof(drawing))
drawing[i++] = 0;
/* Open printer device, and set for binary output */
set_raw(pfp = fopen(device, "wbvq"));
/* Allocate buffer for printer */
printf("Initalize... ");
if(!(vbseg = alloc_seg((BUFSIZE+15)/16)))
abort("Not enough memory!");
/* Zero the initial bitmap in the buffer */
for(i=0; i < BUFSIZE; ++i)
poke(vbseg, i, 0);
/* Draw all the objects */
printf("Draw objects... ");
xyorder = xyorders[printer];
dpos = 0;
while(!draw_object(0, 0));
printf("Print... ");
/* Add code to this switch statement to support additional printers */
switch(printer) {
case 0 : /* Laserjet raster format */
fprintf(pfp,"\x1B*t75R"); /* Set 75 Dots per inch */
fprintf(pfp,"\x1B*r0A"); /* Enable raster graphics */
for(dpos=i=0; i < HORIZONTAL; ++i) {
fprintf(pfp,"\x1B*b60W"); /* Transfer graphics line */
for(j=0; j < (VERTICAL/8); ++j)
putc(peek(vbseg, dpos++), pfp); }
fprintf(pfp,"\x1B*rB\f"); /* End raster graphics */
break;
case 1 : /* EPSON dot-matrix format */
for(i=0; i < (HORIZONTAL/8); ++i) {
fprintf(pfp,"\x1BK\xE0\x01"); /* Graphics: 480 dots */
for(j=0; j < BUFSIZE; j += (HORIZONTAL/8))
putc(peek(vbseg, i + j), pfp);
fprintf(pfp,"\r\x1BJ\x18"); } /* Advance 8 lines */
}
/* Close the output file & we are all done */
fclose(pfp);
printf("Done.");
}
/*
* Draws an object from the drawing file
*/
draw_object(xoffset, yoffset)
int xoffset, yoffset;
{
int x, y, i, j, k, l;
char buffer[80], *ptr;
i = drawing[dpos++];
x = dvalue() + xoffset;
y = dvalue() + yoffset;
switch(i) {
case LINE :
line(x, y, x+dvalue(), y+dvalue());
break;
case BOX :
box(x, y, x+dvalue(), y+dvalue());
break;
case CIRCLE :
circle(x, y, dvalue());
break;
case TEXT :
i = dvalue();
ptr = buffer;
do
*ptr++ = j = drawing[dpos++];
while(j);
text(buffer, x, y, i);
break;
case ARC:
arc(x, y, dvalue(), dvalue(), dvalue());
break;
case GROUP :
i = dvalue();
j = dpos;
while((dpos - j) < i)
draw_object(x, y);
break;
case RCOPY :
i = dpos - 5;
i += dvalue();
goto gocopy;
case ACOPY :
i = dvalue();
gocopy:
j = dpos;
dpos = i+1;
k = dvalue();
l = dvalue();
dpos = i;
draw_object(x - k, y - l);
dpos = j;
break;
default:
abort("Corrupt drawing file!");
case 0 :
return -1; }
return 0;
}
/*
* Draw a line from point (x1, y1) to (x2, y2)
*/
line(x1, y1, x2, y2)
int x1, y1, x2, y2;
{
int i, w, h;
/* If 'X' is greater, increment through 'X' coordinate */
if((w = abs(x1 - x2)) >= (h = abs(y1 - y2))) {
if(x1 > x2) {
i = x1;
x1 = x2;
x2 = i;
i = y1;
y1 = y2;
y2 = i; }
if(y1 < y2) {
for(i=0; i < w; ++i)
set_pixel(x1+i, y1+scale(i, h, w)); }
else {
for(i=0; i < w; ++i)
set_pixel(x1+i, y1-scale(i, h, w)); } }
/* If 'Y' is greater, increment through 'Y' coordinate */
else {
if(y1 > y2) {
i = x1;
x1 = x2;
x2 = i;
i = y1;
y1 = y2;
y2 = i; }
if(x1 < x2) {
for(i=0; i < h; ++i)
set_pixel(x1+scale(i, w, h), y1+i); }
else {
for(i=0; i < h; ++i)
set_pixel(x1-scale(i, w, h), y1+i); } }
set_pixel(x2, y2);
}
/*
* Draw a box with opposite corners (x1, y1) to (x2, y2)
*/
box(x1, y1, x2, y2)
int x1, y1, x2, y2;
{
line(x1, y1, x2, y1); /* Top */
line(x1, y1, x1, y2); /* Left side */
line(x2, y1, x2, y2); /* Right side */
line(x1, y2, x2, y2); /* Bottom */
}
/*
* Draw a circle about point (x, y) of radius (r)
*/
circle(x, y, r)
int x, y, r;
{
int i, j, k, rs, lj;
rs = (lj = r)*r;
for(i=0; i <= r; ++i) {
j = k = sqrt(rs - (i*i));
do {
set_pixel(x+i, y+j);
set_pixel(x+i, y-j);
set_pixel(x-i, y+j);
set_pixel(x-i, y-j); }
while(++j < lj);
lj = k; }
}
/*
* Draw an arc centered at (x, y), radius r at vectors v1, v2
*/
arc(x, y, r, v1, v2)
int x, y, r;
unsigned char v1, v2;
{
int rs, i, j, ax, x1, y1, x2, y2;
x2 = -1;
rs = r*r;
do {
j = (ARC_RES-1) - (i = v1 & (ARC_RES-1));
switch(v1 & (ARC_RES*3)) {
case ARC_RES*0 : /* Quadrant one */
x1 = x + (ax = scale(r, sine[i], -1));
y1 = y - sqrt(rs - (ax*ax));
break;
case ARC_RES*1 : /* Quadrant two */
x1 = x + (ax = scale(r, sine[j], -1));
y1 = y + sqrt(rs - (ax*ax));
break;
case ARC_RES*2 : /* Quadrant three */
x1 = x - (ax = scale(r, sine[i], -1));
y1 = y + sqrt(rs - (ax*ax));
break;
case ARC_RES*3 : /* Quadrant four */
x1 = x - (ax = scale(r, sine[j], -1));
y1 = y - sqrt(rs - (ax*ax)); }
if(x2 != -1)
line(x2, y2, x1, y1);
x2 = x1;
y2 = y1; }
while(v1++ != v2);
}
/*
* Draw a text string on the screen at specified scale
*/
text(string, x, y, s)
char *string;
int x, y, s;
{
unsigned i, j, b;
unsigned char *ptr;
y -= scale(24, s, 100);
while(*string) {
ptr = &font[(*string++ - ' ') * 48];
for(i=0; i < 24; ++i) {
b = (*ptr++ << 8) | *ptr++;
for(j=0; j < 16; ++j) {
if(b & 0x8000)
set_pixel(x+scale(j,s,100), y+scale(i,s,100));
b <<= 1; } }
x += scale(18, s, 100); }
}
/*
* Retrieve a 16 bit value from the drawing list
*/
dvalue()
{
return (drawing[dpos++] << 8) | drawing[dpos++];
}
/*
* Set a graphic pixel in the output buffer.
*/
set_pixel(x, y)
unsigned x, y;
{
unsigned byte;
if((x < HORIZONTAL) && (y < VERTICAL)) {
y = (VERTICAL-1) - y; /* Flip because printer outputs from bottom */
if(xyorder) { /* COLUMN alignment */
byte = (x * (VERTICAL/8)) + (y / 8);
poke(vbseg, byte, peek(vbseg, byte) | (0x80 >> (y % 8))); }
else { /* ROM alignment */
byte = (y * (HORIZONTAL/8)) + (x / 8);
poke(vbseg, byte, peek(vbseg, byte) | (0x80 >> (x % 8))); } }
}
/*
* Scale a value by a fraction, using a 32 bit intermediate result,
* and round up/down to nearest integer ressult.
*/
scale(value, mul, div) asm
{
MOV AX,8[BP] ; Get value
MUL WORD PTR 6[BP] ; Multiply to 32 bit product
MOV BX,4[BP] ; Get divisor
DIV BX ; Divide back to 16 bit result
SHR BX,1 ; /2 for test
JZ scale1 ; Special case (/1)
INC DX ; .5 rounds up
SUB BX,DX ; Set 'C' if remainder > half
ADC AX,0 ; Increment result to scale
scale1:
}
/*
* Set a device into "raw" mode for pure binary output
*/
set_raw(fp) asm
{
MOV BX,4[BP] ; Get file pointer
MOV AX,4400h ; IOCTL:Get info
MOV BX,1[BX] ; Get DOS file handle
INT 21h ; Ask DOS
TEST DL,80h ; Device?
JZ setr1 ; Not a device...
XOR DH,DH ; Force DH=0
OR DL,20h ; Set RAM mode
MOV AX,4401h ; IOCTL:Set info
INT 21h ; Ask DOS
setr1:
}