plotutils-graph-patches-lloda/libplot/i_defplot.c

/* This file is part of the GNU plotutils package.  Copyright (C) 1995,
   1996, 1997, 1998, 1999, 2000, 2005, 2008, Free Software Foundation, Inc.

   The GNU plotutils package is free software.  You may 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, or (at your
   option) any later version.

   The GNU plotutils package 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 the GNU plotutils package; see the file COPYING.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin St., Fifth Floor,
   Boston, MA 02110-1301, USA. */

/* This file defines the initialization for any GIFPlotter object,
   including both private data and public methods.  There is a one-to-one
   correspondence between public methods and user-callable functions in the
   C API. */

#include "sys-defines.h"
#include "extern.h"
#include "xmi.h"		/* use libxmi scan conversion module */

/* forward references */
static bool parse_bitmap_size (const char *bitmap_size_s, int *width, int *height);

#ifndef LIBPLOTTER
/* In libplot, this is the initialization for the function-pointer part of
   a GIFPlotter struct. */
const Plotter _pl_i_default_plotter = 
{
  /* initialization (after creation) and termination (before deletion) */
  _pl_i_initialize, _pl_i_terminate,
  /* page manipulation */
  _pl_i_begin_page, _pl_i_erase_page, _pl_i_end_page,
  /* drawing state manipulation */
  _pl_g_push_state, _pl_g_pop_state,
  /* internal path-painting methods (endpath() is a wrapper for the first) */
  _pl_i_paint_path, _pl_i_paint_paths, _pl_g_path_is_flushable, _pl_g_maybe_prepaint_segments,
  /* internal methods for drawing of markers and points */
  _pl_g_paint_marker, _pl_i_paint_point,
  /* internal methods that plot strings in Hershey, non-Hershey fonts */
  _pl_g_paint_text_string_with_escapes, _pl_g_paint_text_string,
  _pl_g_get_text_width,
  /* private low-level `retrieve font' method */
  _pl_g_retrieve_font,
  /* `flush output' method, called only if Plotter handles its own output */
  _pl_g_flush_output,
  /* error handlers */
  _pl_g_warning,
  _pl_g_error,
};
#endif /* not LIBPLOTTER */

/* The private `initialize' method, which is invoked when a Plotter is
   created.  It is used for such things as initializing capability flags
   from the values of class variables, allocating storage, etc.  When this
   is invoked, _plotter points to the Plotter that has just been
   created. */

void
_pl_i_initialize (S___(Plotter *_plotter))
{
#ifndef LIBPLOTTER
  /* in libplot, manually invoke superclass initialization method */
  _pl_g_initialize (S___(_plotter));
#endif

  /* override superclass initializations, as necessary */

#ifndef LIBPLOTTER
  /* tag field, differs in derived classes */
  _plotter->data->type = PL_GIF;
#endif

  /* output model */
  _plotter->data->output_model = PL_OUTPUT_VIA_CUSTOM_ROUTINES;

  /* user-queryable capabilities: 0/1/2 = no/yes/maybe */
  _plotter->data->have_wide_lines = 1;
  _plotter->data->have_dash_array = 1;
  _plotter->data->have_solid_fill = 1;
  _plotter->data->have_odd_winding_fill = 1;
  _plotter->data->have_nonzero_winding_fill = 1;
  _plotter->data->have_settable_bg = 1;
  _plotter->data->have_escaped_string_support = 0;
  _plotter->data->have_ps_fonts = 0;
  _plotter->data->have_pcl_fonts = 0;
  _plotter->data->have_stick_fonts = 0;
  _plotter->data->have_extra_stick_fonts = 0;
  _plotter->data->have_other_fonts = 0;

  /* text and font-related parameters (internal, not queryable by user);
     note that we don't set kern_stick_fonts, because it was set by the
     superclass initialization (and it's irrelevant for this Plotter type,
     anyway) */
  _plotter->data->default_font_type = PL_F_HERSHEY;
  _plotter->data->pcl_before_ps = false;
  _plotter->data->have_horizontal_justification = false;
  _plotter->data->have_vertical_justification = false;
  _plotter->data->issue_font_warning = true;

  /* path-related parameters (also internal); note that we
     don't set max_unfilled_path_length, because it was set by the
     superclass initialization */
  _plotter->data->have_mixed_paths = false;
  _plotter->data->allowed_arc_scaling = AS_AXES_PRESERVED;
  _plotter->data->allowed_ellarc_scaling = AS_AXES_PRESERVED;
  _plotter->data->allowed_quad_scaling = AS_NONE;  
  _plotter->data->allowed_cubic_scaling = AS_NONE;  
  _plotter->data->allowed_box_scaling = AS_NONE;
  _plotter->data->allowed_circle_scaling = AS_NONE;
  _plotter->data->allowed_ellipse_scaling = AS_AXES_PRESERVED;

  /* dimensions */
  _plotter->data->display_model_type = (int)DISP_MODEL_VIRTUAL;
  _plotter->data->display_coors_type = (int)DISP_DEVICE_COORS_INTEGER_LIBXMI;
  _plotter->data->flipped_y = true;
  _plotter->data->imin = 0;
  _plotter->data->imax = 569;  
  _plotter->data->jmin = 569;
  _plotter->data->jmax = 0;
  _plotter->data->xmin = 0.0;
  _plotter->data->xmax = 0.0;  
  _plotter->data->ymin = 0.0;
  _plotter->data->ymax = 0.0;  
  _plotter->data->page_data = (plPageData *)NULL;

  /* initialize data members specific to this derived class */
  /* parameters */
  _plotter->i_xn = _plotter->data->imax + 1;
  _plotter->i_yn = _plotter->data->jmin + 1;
  _plotter->i_num_pixels = (_plotter->i_xn) * (_plotter->i_yn);
  _plotter->i_animation = true;	/* default, can be turned off */
  _plotter->i_iterations = 0;
  _plotter->i_delay = 0;
  _plotter->i_interlace = false;
  _plotter->i_transparent = false;  
  _plotter->i_transparent_color.red = 255; /* dummy */
  _plotter->i_transparent_color.green = 255; /* dummy */
  _plotter->i_transparent_color.blue = 255; /* dummy */
  _plotter->i_transparent_index = 0; /* dummy */
  /* storage used by libxmi's reentrant miDrawArcs_r() function for
     cacheing rasterized ellipses */
  _plotter->i_arc_cache_data = (void *)miNewEllipseCache ();
  /* dynamic variables */
  _plotter->i_painted_set = (void *)NULL;
  _plotter->i_canvas = (void *)NULL;
  /* N.B. _plotter->i_colormap is initialized in i_openpl.c */
  _plotter->i_num_color_indices = 0;
  _plotter->i_bit_depth = 0;
  _plotter->i_frame_nonempty = false;
  _plotter->i_pixels_scanned = 0;
  _plotter->i_pass = 0;
  _plotter->i_hot.x = 0;
  _plotter->i_hot.y = 0;  
  /* N.B. _plotter->i_global_colormap, i_num_global_color_indices are
     copied into later */
  _plotter->i_header_written = false;

  /* initialize certain data members from device driver parameters */

  /* is there a user-specified transparent color? */
  {
    const char *transparent_name_s;
    plColor color;

    transparent_name_s = (const char *)_get_plot_param (_plotter->data, "TRANSPARENT_COLOR");
    if (transparent_name_s 
	&& _string_to_color (transparent_name_s, &color, _plotter->data->color_name_cache))
      /* have 24-bit RGB */
      {
	_plotter->i_transparent = true;
	_plotter->i_transparent_color = color;
      }
  }

  /* produce an interlaced GIF? */
  {
    const char *interlace_s;

    interlace_s = (const char *)_get_plot_param (_plotter->data, "INTERLACE" );
    if (strcasecmp (interlace_s, "yes") == 0)
      _plotter->i_interlace = true;
  }
  
  /* turn off animation? */
  {
    const char *animate_s;

    animate_s = (const char *)_get_plot_param (_plotter->data, "GIF_ANIMATION" );
    if (strcasecmp (animate_s, "no") == 0)
      _plotter->i_animation = false;
  }
  
  /* determine number of iterations to be used (if animating) */
  {
    const char *iteration_s;
    int num_iterations;

    iteration_s = (const char *)_get_plot_param (_plotter->data, "GIF_ITERATIONS" );
    if (sscanf (iteration_s, "%d", &num_iterations) > 0 
	&& num_iterations >= 0 && num_iterations <= 65535)
      _plotter->i_iterations = num_iterations;
  }

  /* determine delay after each frame, in 1/100 sec units */
  {
    const char *delay_s;
    int delay;

    delay_s = (const char *)_get_plot_param (_plotter->data, "GIF_DELAY" );
    if (sscanf (delay_s, "%d", &delay) > 0 
	&& delay >= 0 && delay <= 65535)
      _plotter->i_delay = delay;
  }

  /* determine the range of device coordinates over which the graphics
     display will extend (and hence the transformation from user to device
     coordinates). */
  {
    const char *bitmap_size_s;
    int width = 1, height = 1;
	
    bitmap_size_s = (const char *)_get_plot_param (_plotter->data, "BITMAPSIZE");
    if (bitmap_size_s && parse_bitmap_size (bitmap_size_s, &width, &height)
	/* insist on range of 1..65535 for GIF format */
	&& width >= 1 && height >= 1
	&& width <= 65535 && height <= 65535)
      /* override defaults above */
      {
	_plotter->data->imax = width - 1;
	_plotter->data->jmin = height - 1;
	_plotter->i_xn = width;
	_plotter->i_yn = height;
	_plotter->i_num_pixels = width * height;
      }
  }

  /* compute the NDC to device-frame affine map, set it in Plotter */
  _compute_ndc_to_device_map (_plotter->data);
}

static bool 
parse_bitmap_size (const char *bitmap_size_s, int *width, int *height)
{
  int local_width = 1, local_height = 1;

  if (bitmap_size_s
      /* should parse this better */
      && sscanf (bitmap_size_s, "%dx%d", &local_width, &local_height) == 2
      && local_width > 0 && local_height > 0)
    {
      *width = local_width;
      *height = local_height;
      return true;
    }
  else
    return false;
}

/* The private `terminate' method, which is invoked when a Plotter is
   deleted.  It may do such things as write to an output stream from
   internal storage, deallocate storage, etc.  When this is invoked,
   _plotter points (temporarily) to the Plotter that is about to be
   deleted. */

void
_pl_i_terminate (S___(Plotter *_plotter))
{
  /* free storage used by libxmi's reentrant miDrawArcs_r() function */
  miDeleteEllipseCache ((miEllipseCache *)_plotter->i_arc_cache_data);

#ifndef LIBPLOTTER
  /* in libplot, manually invoke superclass termination method */
  _pl_g_terminate (S___(_plotter));
#endif
}

#ifdef LIBPLOTTER
GIFPlotter::GIFPlotter (FILE *infile, FILE *outfile, FILE *errfile)
	:Plotter (infile, outfile, errfile)
{
  _pl_i_initialize ();
}

GIFPlotter::GIFPlotter (FILE *outfile)
	:Plotter (outfile)
{
  _pl_i_initialize ();
}

GIFPlotter::GIFPlotter (istream& in, ostream& out, ostream& err)
	: Plotter (in, out, err)
{
  _pl_i_initialize ();
}

GIFPlotter::GIFPlotter (ostream& out)
	: Plotter (out)
{
  _pl_i_initialize ();
}

GIFPlotter::GIFPlotter ()
{
  _pl_i_initialize ();
}

GIFPlotter::GIFPlotter (FILE *infile, FILE *outfile, FILE *errfile, PlotterParams &parameters)
	:Plotter (infile, outfile, errfile, parameters)
{
  _pl_i_initialize ();
}

GIFPlotter::GIFPlotter (FILE *outfile, PlotterParams &parameters)
	:Plotter (outfile, parameters)
{
  _pl_i_initialize ();
}

GIFPlotter::GIFPlotter (istream& in, ostream& out, ostream& err, PlotterParams &parameters)
	: Plotter (in, out, err, parameters)
{
  _pl_i_initialize ();
}

GIFPlotter::GIFPlotter (ostream& out, PlotterParams &parameters)
	: Plotter (out, parameters)
{
  _pl_i_initialize ();
}

GIFPlotter::GIFPlotter (PlotterParams &parameters)
	: Plotter (parameters)
{
  _pl_i_initialize ();
}

GIFPlotter::~GIFPlotter ()
{
  /* if luser left the Plotter open, close it */
  if (_plotter->data->open)
    _API_closepl ();

  _pl_i_terminate ();
}
#endif