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plot2am.c
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C/C++ Source or Header
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1992-05-06
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9KB
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413 lines
/*
plot2am.c : Plot Unix plot files on an Amiga HIRES Screen.
By Joel Swank April, 1988
*/
#include <exec/types.h>
#include <exec/memory.h>
#include <exec/tasks.h>
#include <intuition/intuition.h>
#include <stdio.h>
/* The header files needed for gadget definitions */
#include <intuition/intuitionbase.h>
#include <libraries/dosextens.h>
#include <graphics/gfxbase.h>
#include <graphics/gfx.h>
#include <graphics/gfxmacros.h>
#include <graphics/display.h>
#include <graphics/text.h>
#include <ctype.h>
#include <functions.h>
#include "plotscreen.h"
#ifdef NULL
#undef NULL
#endif
#define NULL ((void *)0)
#define INTUITION_REV 1L
static struct NewWindow New_Window = {
0, 2, /* Take all except the */
XSIZE, YSIZE, /* top two lines */
-1, -1, /* Default pens */
CLOSEWINDOW, /* Inputs acceppeted */
WINDOWCLOSE /* Fairly standard window */
| WINDOWDEPTH | WINDOWDRAG | SMART_REFRESH | BORDERLESS ,
NULL, /* no gadgets */
(struct Image *) NULL,
(UBYTE *)"Plot2Am", /* title */
(struct Screen *) NULL, /* filled at startup */
(struct BitMap *) NULL,
0, 0, 0, 0, /* no change sizes, doesn't matter */
CUSTOMSCREEN
} ;
struct TextAttr myattr = {
(STRPTR)("puny.font"),
7,
0,
FPB_DISKFONT};
struct TextFont *myfont = NULL;
/*
* Some things that need to be shared with done.
*/
struct IntuitionBase *IntuitionBase = NULL;
static struct Window *Wind = NULL ;
static struct Screen *MyScreen = NULL ;
static struct MsgPort *CreatePort() ;
struct GfxBase *GfxBase = NULL;
struct RastPort *rp;
struct Library *DiskfontBase = NULL;
FILE *input;
/* scaling factors */
long xscale, yscale; /* width, height of output device */
long xmult, ymult; /* width, height on Amiga Screen */
long xoff, yoff; /* offset to lower left corner */
/* linemode constants */
char *lmodestr[] = { "dotted",
"solid",
"longdashed",
"shortdashed",
"dotdashed" };
USHORT lmode[] = { 0xaaaa, 0xffff, 0xff00, 0xf0f0, 0xf2f2 };
main(argc,argv)
int argc;
char *argv[];
{
struct IntuiMessage *msg;
int cmd, i;
long x,y, r;
long r1, r2;
long x1,y1,x2,y2;
char textbuf[100], *p;
/*************************************************
Init defaults
*************************************************/
xscale = 3120;
yscale = 3120;
xmult = 550;
ymult = 400;
xoff = 0;
yoff = 0;
/*************************************************
Interrogate command line
*************************************************/
if (argc == 0) exit(1); /* no WB for now */
if (argc == 1)
{
fprintf(stderr,"Usage:plot2am plotfile\n");
exit(2);
}
while (*argv[1] == '-')
{
p = (char *) &*argv[1];
p++; /* point to the option chars */
switch (*p)
{
case 'x': /* x size value */
xmult = atol(++p);
break;
case 'y': /* y size value */
ymult = atol(++p);
break;
default:
fprintf(stderr,"plot2am:Invalid option %s\n",argv[1]);
exit(27);
}
argc--;
argv++;
}
if (argc == 1 || argc >2)
{
fprintf(stderr,"plot2am:Exactly One filename required\n");
exit(2);
}
if ((input = fopen(argv[1],"r")) == NULL)
{
fprintf(stderr,"plot2am: %s: open failed\n",argv[1]);
exit(3);
}
/*************************************************
OPEN everything
*************************************************/
if ((IntuitionBase = (struct IntuitionBase *)
OpenLibrary("intuition.library", INTUITION_REV)) == NULL)
done(21);
GfxBase = (struct GfxBase *)OpenLibrary("graphics.library", NULL);
if (GfxBase == NULL) done(22);
DiskfontBase = (struct Library *)OpenLibrary("diskfont.library", NULL);
if (DiskfontBase == NULL) {
fprintf(stderr,"plot2am:cannot open font library - using default font\n");
}
if ((MyScreen = (struct Screen *) OpenScreen(&NewScreenStructure)) == NULL)
done(23);
New_Window.Screen = MyScreen;
if ((Wind = (struct Window *) OpenWindow(&New_Window)) == NULL)
done(25);
rp = Wind->RPort;
if (DiskfontBase != NULL) {
if ((myfont = (struct TextFont *)OpenDiskFont(&myattr)) == NULL) {
fprintf(stderr,"plot2am:cannot find puny font - using default\n");
} else SetFont(rp,myfont);
}
LoadRGB4(&(MyScreen->ViewPort),&Palette,PaletteColorCount);
/*************************************************
MAIN Drawing loop
*************************************************/
while ((cmd = getc(input)) != EOF)
{
switch (cmd)
{
case 'm': /* move x,y */
get_xy(&x,&y);
Move(rp,x,y);
break;
case 'n': /* draw x,y */
get_xy(&x,&y);
Draw(rp,x,y);
break;
case 'p': /* point x,y */
get_xy(&x,&y);
WritePixel(rp,x,y);
break;
case 'l': /* line xs,ys, xe,ye */
get_xy(&x,&y);
Move(rp,x,y);
get_xy(&x,&y);
Draw(rp,x,y);
break;
case 'a': /* arc xc,yc, xs,ys, xe,ye */
get_xy(&x,&y); /* get center */
get_xy(&x2,&y2); /* get end point */
get_xy(&x1,&y1); /* get start point */
arc(x, y, x1, y1, x2, y2); /* draw counterclockwise */
Move(rp,x1,y1);
break;
case 't': /* Text string\n */
get_txt(textbuf);
if (rp->cp_y == 0) break;
Text(rp,textbuf, (long) strlen(textbuf));
break;
case 'c': /* circle xc,yc, r */
get_xy(&x,&y);
get_int(&r);
r1 = r*xmult/xscale;
r2 = r*ymult/yscale;
DrawEllipse(rp,x,y,r1,r2);
break;
case 'f': /* linemode string\n */
get_txt(textbuf);
for (i=0; i<5; i++)
{
if (0 == strcmp(textbuf,lmodestr[i]))
{
SetDrPt(rp,lmode[i]);
break;
}
}
break;
case 's': /* space xlo,ylo, xhi,yhi */
get_int(&xoff);
get_int(&yoff);
get_int(&xscale);
get_int(&yscale);
xscale = xscale - xoff;
yscale = yscale - yoff;
break;
case 'e': /* erase */
SetAPen(rp,0L);
RectFill(rp,0L,0L,(long) (XSIZE-1),(long) (YSIZE-1));
SetAPen(rp,1L);
break;
}
}
/*************************************************
WAIT for Close Gadget
*************************************************/
while (1)
{
Wait( 1L << Wind->UserPort->mp_SigBit); /* wait on mesg */
while(msg = (struct IntuiMessage *) GetMsg(Wind->UserPort)) {
switch(msg->Class) {
case CLOSEWINDOW:
ReplyMsg(msg);
done(0);
}
ReplyMsg(msg);
}
}
}
/*************************************************
Parameter input routines
*************************************************/
/*
* input a pair of 16 bit ints, scale
* and return them as longs
*
*/
get_xy(x,y)
register long *x, *y;
{
get_int(x);
*x = (*x-xoff)*xmult/xscale;
get_int(y);
*y = (YSIZE-1)-(*y-yoff)*ymult/yscale;
}
/*
* input a 16 bit int and return as a long
*/
get_int(num)
long *num;
{
register long hi, lo;
lo = (long) getc(input);
hi = ( (long) getc(input)) << 8;
*num = lo + hi;
}
/*
* input a text string delinited by newline,
* return to buffer delimited by a null.
*/
get_txt(str)
char *str;
{
register int cmd;
while ((cmd = getc(input)) != '\n')
*str++ = cmd;
*str = '\0';
}
/*
* done - just clean up that which is open, and then leave.
*/
done(how)
int how;
{
if (Wind) CloseWindow(Wind) ;
if (MyScreen) CloseScreen(MyScreen) ;
if (IntuitionBase) CloseLibrary(IntuitionBase) ;
if (GfxBase) CloseLibrary(GfxBase) ;
if (DiskfontBase) CloseLibrary(DiskfontBase) ;
if (myfont != NULL) CloseFont( myfont );
OpenWorkBench() ; /* As requested */
exit(how) ;
}
/*
* arc and integer sqrt routines.
* lifted from sunplot program by:
Sjoerd Mullender
Dept. of Mathematics and Computer Science
Free University
Amsterdam
Netherlands
Email: sjoerd@cs.vu.nl
If this doesn't work, try ...!seismo!mcvax!cs.vu.nl!sjoerd or
...!seismo!mcvax!vu44!sjoerd or sjoerd%cs.vu.nl@seismo.css.gov.
*
*/
long
isqrt(n)
long n;
{
long a, b, c;
a = n;
b = n;
if (n > 1) {
while (a > 0) {
a = a >> 2;
b = b >> 1;
}
do {
a = b;
c = n / b;
b = (c + a) >> 1;
} while ((a - c) < -1 || (a - c) > 1);
}
return b;
}
#define setcir(x, y, a1, b1, c1, a2, b2, c2) \
{if (a1 * (y) - b1 * (x) >= c1 && a2 * (y) - b2 * (x) <= c2) \
WritePixel(rp,x, y);}
arc(x, y, x1, y1, x2, y2)
long x, y, x1, y1, x2, y2;
{
register long a1 = x1 - x, b1 = y1 - y, a2 = x2 - x, b2 = y2 - y;
register long c1 = a1 * y - b1 * x, c2 = a2 * y - b2 * x;
register long r2 = a1 * a1 + b1 * b1;
register long i, sqrt;
for (i = isqrt(r2 >> 1); i >= 0; i -= 1) {
sqrt = isqrt(r2 - i * i);
setcir(x + i, y + sqrt, a1, b1, c1, a2, b2, c2);
setcir(x + i, y - sqrt, a1, b1, c1, a2, b2, c2);
setcir(x - i, y + sqrt, a1, b1, c1, a2, b2, c2);
setcir(x - i, y - sqrt, a1, b1, c1, a2, b2, c2);
setcir(x + sqrt, y + i, a1, b1, c1, a2, b2, c2);
setcir(x + sqrt, y - i, a1, b1, c1, a2, b2, c2);
setcir(x - sqrt, y + i, a1, b1, c1, a2, b2, c2);
setcir(x - sqrt, y - i, a1, b1, c1, a2, b2, c2);
}
}