Turnbull China Bikeride/Turnbull China Bikeride - Disc 1.iso/HENSA/MATHS/PLPLOT/PLPLOT.ZIP/sys/amiga/src/pla_pr.c

C/C++ Source or Header | 1994-03-23 | 5.4 KB | 213 lines

/* $Id: pla_pr.c,v 1.4 1994/03/23 08:56:15 mjl Exp $
   $Log: pla_pr.c,v $
 * Revision 1.4  1994/03/23  08:56:15  mjl
 * Header file rearrangement, also removed some redundant variable clears.
 *
 * Revision 1.3  1993/07/31  07:56:55  mjl
 * Several driver functions consolidated, for all drivers.  The width and color
 * commands are now part of a more general "state" command.  The text and
 * graph commands used for switching between modes is now handled by the
 * escape function (very few drivers require it).  The device-specific PLDev
 * structure is now malloc'ed for each driver that requires it, and freed when
 * the stream is terminated.
 *
 * Revision 1.2  1993/07/01  21:59:53  mjl
 * Changed all plplot source files to include plplotP.h (private) rather than
 * plplot.h.  Rationalized namespace -- all externally-visible plplot functions
 * now start with "pl"; device driver functions start with "plD_".
*/

/*    pla_pr.c

    PLPLOT Amiga (preferences) printer device driver.
    Most of the code is in plsupport.c where it is shared with the
    menu selection printer dump.
*/

#include "plplotP.h"
#include "drivers.h"
#include "plamiga.h"

/* top level declarations */

static long bmapx, bmapy, bmapxmax, bmapymax, xdpi, ydpi;
static long dwidth, dheight;

/*----------------------------------------------------------------------*\
* plD_init_amipr()
*
* Initialize device.
\*----------------------------------------------------------------------*/

void
plD_init_amipr(PLStream *pls)
{
    PLDev *dev;
    int mode;

    pls->termin = 0;        /* not an interactive terminal */
    pls->icol0 = 1;
    pls->width = 1;
    pls->bytecnt = 0;
    pls->page = 0;

    if (!pls->colorset)
        pls->color = 0;        /* no color by default: user can override */

    if (openprinter())
    plexit("");

    mode = queryprint(&bmapx, &bmapy, &bmapxmax, &bmapymax, &xdpi, &ydpi);

/* If mode == 1 we want to adjust the bitmap size so that the aspect
   ratio is maintained.
*/
    if (mode) {
    if ((float) bmapxmax * bmapy > (float) bmapymax * bmapx)
        bmapy = (int) (((float) bmapx * bmapymax) / bmapxmax + .5);
    else
        bmapx = (int) (((float) bmapy * bmapxmax) / bmapymax + .5);
    }

/* Leave a little space for pen width. */

    dwidth = bmapx - 2;
    dheight = bmapy - 2;

/* Allocate and initialize device-specific data */

    dev = plAllocDev(pls);

    dev->xold = UNDEFINED;
    dev->yold = UNDEFINED;
    dev->xmin = 0;
    dev->xmax = bmapxmax;
    dev->ymin = 0;
    dev->ymax = bmapymax;

    plP_setpxl((ydpi / 25.4), (xdpi / 25.4));
    plP_setphy(0, bmapymax, 0, bmapxmax);

/* Allocate bitmap and initial for line drawing */

    if (mapinit(bmapx, bmapy)) {
    closeprinter();
    plexit("");
    }
}

/*----------------------------------------------------------------------*\
* plD_line_amipr()
*
* Draw a line in the current color from (x1,y1) to (x2,y2).
\*----------------------------------------------------------------------*/

void
plD_line_amipr(PLStream *pls, short x1a, short y1a, short x2a, short y2a)
{
    PLDev *dev = (PLDev *) pls->dev;
    int x1=x1a, y1=y1a, x2=x2a, y2=y2a;
    long xn1, yn1, xn2, yn2;

    xn1 = (x1 * dheight) / bmapymax;
    yn1 = (y1 * dwidth) / bmapxmax;
    xn2 = (x2 * dheight) / bmapymax;
    yn2 = (y2 * dwidth) / bmapxmax;
    switch (pls->width) {
    case 3:
    mapline(yn1, xn1, yn2, xn2);
    case 2:
    mapline(yn1 + 2, xn1 + 2, yn2 + 2, xn2 + 2);
    case 1:
    default:
    mapline(yn1 + 1, xn1 + 1, yn2 + 1, xn2 + 1);
    }
}

/*----------------------------------------------------------------------*\
* plD_polyline_amipr()
*
* Draw a polyline in the current color.
\*----------------------------------------------------------------------*/

void
plD_polyline_amipr (PLStream *pls, short *xa, short *ya, PLINT npts)
{
    PLINT i;

    for (i=0; i<npts-1; i++)
      plD_line_amipr( pls, xa[i], ya[i], xa[i+1], ya[i+1] );
}

/*----------------------------------------------------------------------*\
* plD_eop_amipr()
*
* End of page.
\*----------------------------------------------------------------------*/

void
plD_eop_amipr(PLStream *pls)
{
    dmpport(0L, bmapx, bmapy);
    /* Eject the page. */
    ejectpage();
}

/*----------------------------------------------------------------------*\
* plD_bop_amipr()
*
* Set up for the next page.
* Advance to next family file if necessary (file output).
\*----------------------------------------------------------------------*/

void
plD_bop_amipr(PLStream *pls)
{
    mapclear();
    pls->page++;
}

/*----------------------------------------------------------------------*\
* plD_tidy_amipr()
*
* Close graphics file or otherwise clean up.
\*----------------------------------------------------------------------*/

void
plD_tidy_amipr(PLStream *pls)
{
    mapfree();
    closeprinter();
}

/*----------------------------------------------------------------------*\
* plD_state_amipr()
*
* Handle change in PLStream state (color, pen width, fill attribute, etc).
\*----------------------------------------------------------------------*/

void
plD_state_amipr(PLStream *pls, PLINT op)
{
    switch (op) {

      case PLSTATE_WIDTH:
    if (pls->width < 1)
        pls->width = 1;
    else if (pls->width > 3)
        pls->width = 3;
    break;
    }
}

/*----------------------------------------------------------------------*\
* plD_esc_amipr()
*
* Escape function.
\*----------------------------------------------------------------------*/

void
plD_esc_amipr(PLStream *pls, PLINT op, char *ptr)
{
}