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/* This file defines the initialization for any PNG Plotter 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"
#ifndef LIBPLOTTER
/* In libplot, this is the initialization for the function-pointer part of
a PNGPlotter struct. It is the same as for a BitmapPlotter, except for
the routines _z_initialize and _z_terminate. */
const Plotter _z_default_plotter =
{
/* initialization (after creation) and termination (before deletion) */
_z_initialize, _z_terminate,
/* page manipulation */
_b_begin_page, _b_erase_page, _b_end_page,
/* drawing state manipulation */
_g_push_state, _g_pop_state,
/* internal path-painting methods (endpath() is a wrapper for the first) */
_b_paint_path, _b_paint_paths, _g_path_is_flushable, _g_maybe_prepaint_segments,
/* internal methods for drawing of markers and points */
_g_paint_marker, _b_paint_point,
/* internal methods that plot strings in Hershey, non-Hershey fonts */
_g_paint_text_string_with_escapes, _g_paint_text_string,
_g_get_text_width,
/* private low-level `retrieve font' method */
_g_retrieve_font,
/* `flush output' method, called only if Plotter handles its own output */
_g_flush_output,
/* error handlers */
_g_warning,
_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
#ifdef _HAVE_PROTOS
_z_initialize (S___(Plotter *_plotter))
#else
_z_initialize (S___(_plotter))
S___(Plotter *_plotter;)
#endif
{
#ifndef LIBPLOTTER
/* in libplot, manually invoke superclass initialization method */
_b_initialize (S___(_plotter));
#endif
/* override superclass initializations, as necessary */
#ifndef LIBPLOTTER
/* tag field, differs in derived classes */
_plotter->data->type = PL_PNG;
#endif
/* output model */
_plotter->data->output_model = PL_OUTPUT_VIA_CUSTOM_ROUTINES;
/* initialize data members specific to this derived class */
/* parameters */
_plotter->z_interlace = false;
_plotter->z_transparent = false;
_plotter->z_transparent_color.red = 255; /* dummy */
_plotter->z_transparent_color.green = 255; /* dummy */
_plotter->z_transparent_color.blue = 255; /* dummy */
/* initialize certain data members from device driver parameters */
/* produce an interlaced PNG? */
{
const char *interlace_s;
interlace_s = (const char *)_get_plot_param (_plotter->data, "INTERLACE" );
if (strcasecmp (interlace_s, "yes") == 0)
_plotter->z_interlace = true;
}
/* 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->z_transparent = true;
_plotter->z_transparent_color = color;
}
}
}
/* 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
#ifdef _HAVE_PROTOS
_z_terminate (S___(Plotter *_plotter))
#else
_z_terminate (S___(_plotter))
S___(Plotter *_plotter;)
#endif
{
#ifndef LIBPLOTTER
/* in libplot, manually invoke superclass termination method */
_b_terminate (S___(_plotter));
#endif
}
#ifdef LIBPLOTTER
PNGPlotter::PNGPlotter (FILE *infile, FILE *outfile, FILE *errfile)
: BitmapPlotter (infile, outfile, errfile)
{
_z_initialize ();
}
PNGPlotter::PNGPlotter (FILE *outfile)
: BitmapPlotter (outfile)
{
_z_initialize ();
}
PNGPlotter::PNGPlotter (istream& in, ostream& out, ostream& err)
: BitmapPlotter (in, out, err)
{
_z_initialize ();
}
PNGPlotter::PNGPlotter (ostream& out)
: BitmapPlotter (out)
{
_z_initialize ();
}
PNGPlotter::PNGPlotter ()
{
_z_initialize ();
}
PNGPlotter::PNGPlotter (FILE *infile, FILE *outfile, FILE *errfile, PlotterParams ¶meters)
: BitmapPlotter (infile, outfile, errfile, parameters)
{
_z_initialize ();
}
PNGPlotter::PNGPlotter (FILE *outfile, PlotterParams ¶meters)
: BitmapPlotter (outfile, parameters)
{
_z_initialize ();
}
PNGPlotter::PNGPlotter (istream& in, ostream& out, ostream& err, PlotterParams ¶meters)
: BitmapPlotter (in, out, err, parameters)
{
_z_initialize ();
}
PNGPlotter::PNGPlotter (ostream& out, PlotterParams ¶meters)
: BitmapPlotter (out, parameters)
{
_z_initialize ();
}
PNGPlotter::PNGPlotter (PlotterParams ¶meters)
: BitmapPlotter (parameters)
{
_z_initialize ();
}
PNGPlotter::~PNGPlotter ()
{
_z_terminate ();
}
#endif
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