source: git/src/avenprcore.cc @ a72ed95

/* avenprcore.cc
 * Printer independent parts of Survex printer drivers
 * Copyright (C) 1993-2002,2004,2005,2006,2010,2011,2012,2013,2014,2015 Olly Betts
 * Copyright (C) 2004 Philip Underwood
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <math.h>
#include <string.h>
#include <ctype.h>
#include <float.h>

#include "mainfrm.h"

#include "useful.h"
#include "filename.h"
#include "message.h"
#include "filelist.h"
#include "img_hosted.h"
#include "avenprcore.h"
#include "debug.h"

#if defined __WXMSW__ || defined __WXMAC__
# include <wx/dcprint.h>
#else
# include <wx/dcps.h>
#endif

layout::layout(wxPageSetupDialogData* data)
        : show_mask(0),
          SkipBlank(false), Border(true), Cutlines(true), Legend(true),
          title(), datestamp(), Scale(0), rot(0), tilt(0),
          view(PLAN), scX(1), scY(1), xMin(0), xMax(-1), yMin(0), yMax(-1),
          pagesX(1), pagesY(1), pages(1), xOrg(0), yOrg(0), footer()
{
    if (data) {
        // Printing.

        // Create a temporary wxPrinterDC/wxPostScriptDC so we can get access
        // to the size of the printable area in mm to allow us to calculate how
        // many pages will be needed.
#if defined __WXMSW__ || defined __WXMAC__
        wxPrinterDC pdc(data->GetPrintData());
#else
        wxPostScriptDC pdc(data->GetPrintData());
#endif
        int width, depth;
        pdc.GetSizeMM(&width, &depth);
        width -= data->GetMarginBottomRight().x + data->GetMarginTopLeft().x;
        PaperWidth = width;
        depth -= data->GetMarginBottomRight().y + data->GetMarginTopLeft().y;
        // Allow for the 10mm footer.
        PaperDepth = depth - 10;
    } else {
        // Exporting.
        PaperWidth = PaperDepth = 0;
    }
}

void
layout::pages_required() {
    double image_dx, image_dy;
    double image_centre_x, image_centre_y;
    double paper_centre_x, paper_centre_y;

    double allow = 21.0;
    if (Legend) allow += 30.0;
    double Sc = 1000 / Scale;
    image_dx = (xMax - xMin) * Sc;
    if (PaperWidth > 0.0) {
        pagesX = (int)ceil((image_dx + 19.0) / PaperWidth);
    } else {
        /* paperwidth not fixed (eg window or roll printer/plotter) */
        pagesX = 1;
        PaperWidth = image_dx + 19.0;
    }
    paper_centre_x = (pagesX * PaperWidth) / 2;
    image_centre_x = Sc * (xMax + xMin) / 2;
    xOrg = paper_centre_x - image_centre_x;

    image_dy = (yMax - yMin) * Sc;
    if (PaperDepth > 0.0) {
        pagesY = (int)ceil((image_dy + allow) / PaperDepth);
    } else {
        /* paperdepth not fixed (eg window or roll printer/plotter) */
        pagesY = 1;
        PaperDepth = image_dy + allow;
    }
    paper_centre_y = 20 + (pagesY * PaperDepth) / 2;
    image_centre_y = Sc * (yMax + yMin) / 2;
    yOrg = paper_centre_y - image_centre_y;

    pages = pagesX * pagesY;
}

#define DEF_RATIO (1.0/(double)DEFAULT_SCALE)

/* pick a scale which will make it fit in the desired size */
void
layout::pick_scale(int x, int y)
{
   double Sc_x, Sc_y;
   /*    pagesY = ceil((image_dy+allow)/PaperDepth)
    * so (image_dy+allow)/PaperDepth <= pagesY < (image_dy+allow)/PaperDepth+1
    * so image_dy <= pagesY*PaperDepth-allow < image_dy+PaperDepth
    * and Sc = image_dy / (yMax-yMin)
    * so Sc <= (pagesY*PaperDepth-allow)/(yMax-yMin) < Sc+PaperDepth/(yMax-yMin)
    */
   Sc_x = Sc_y = DEF_RATIO;
   if (PaperWidth > 0.0 && xMax > xMin)
      Sc_x = (x * PaperWidth - 19.0) / (xMax - xMin);
   if (PaperDepth > 0.0 && yMax > yMin) {
      double allow = 21.0;
      if (Legend) allow += 30.0;
      Sc_y = (y * PaperDepth - allow) / (yMax - yMin);
   }

   Sc_x = min(Sc_x, Sc_y) * 0.99; /* shrink by 1% so we don't cock up */
#if 0 /* this picks a nice (in some sense) ratio, but is too stingy */
   double E = pow(10.0, floor(log10(Sc_x)));
   Sc_x = floor(Sc_x / E) * E;
#endif

   double Scale_exact = 1000.0 / Sc_x;

   /* trim to 2 s.f. (rounding up) */
   double w = pow(10.0, floor(log10(Scale_exact) - 1.0));
   Scale = ceil(Scale_exact / w) * w;
}

#if 0
bool fBlankPage = fFalse;

void print_all(MainFrm *m_parent, layout *l, device *pri) {
    int cPasses, pass;
    unsigned int cPagesPrinted;
    const char *msg166;
    int state;
    char *p;
    int old_charset;
    int page, pageLim;
    pageLim = l->pagesX*l->pagesY;
    PaperWidth = l->PaperWidth;
    PaperDepth = l->PaperDepth;
    /* if no explicit Alloc, default to one pass */
    cPasses = Pre(l->pages, l->title);

    /* note down so we can switch to printer charset */
    msg166 = msgPerm(/*Page %d of %d*/166);
    old_charset = select_charset(CHARSET_ISO_8859_1);

    l->footer = msgPerm(/*Survey “%s”   Page %d (of %d)   Processed on %s*/167);

    cPagesPrinted = 0;
    page = state = 0;
    p = l->szPages;
    while (1) {
        if (pageLim == 1) {
            if (page == 0)
                page = 1;
            else
                page = 0; /* we've already printed the only page */
        } else if (!*l->szPages) {
            page++;
            if (page > pageLim) page = 0; /* all pages printed */
        } else {
            page = next_page(&state, &p, pageLim);
        }
        SVX_ASSERT(state >= 0); /* errors should have been caught above */
        if (page == 0) break;
        cPagesPrinted++;
        if (l->pages > 1) {
            putchar('\r');
            printf(msg166, (int)cPagesPrinted, l->pages);
        }
        /* don't skip the page with the legend on */
        if (l->SkipBlank && (int)page != (l->pagesY - 1) * l->pagesX + 1) {
            pass = -1;
            fBlankPage = fTrue;
        } else {
            pass = 0;
            fBlankPage = fFalse;
        }
        print_page(m_parent, l, page, pass, cPasses);
    }

    Quit();
    select_charset(old_charset);
}
#endif