gnuplot/term/cgm.trm at 1993e3064376ce9bfb3eccbdfbcb17027795cee4 · gnuplot/gnuplot · GitHub

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/* Hey Emacs this is -*- C -*-

* $Id: cgm.trm,v 1.90 2008/11/15 19:38:55 sfeam Exp $

/* GNUPLOT - cgm.trm */

/*[

* Permission to use, copy, and distribute this software and its

* documentation for any purpose with or without fee is hereby granted,

* provided that the above copyright notice appear in all copies and

* that both that copyright notice and this permission notice appear

* in supporting documentation.

* Permission to modify the software is granted, but not the right to

* distribute the complete modified source code. Modifications are to

* be distributed as patches to the released version. Permission to

* distribute binaries produced by compiling modified sources is granted,

* provided you

* 1. distribute the corresponding source modifications from the

* released version in the form of a patch file along with the binaries,

* 2. add special version identification to distinguish your version

* in addition to the base release version number,

* 3. provide your name and address as the primary contact for the

* support of your modified version, and

* 4. retain our contact information in regard to use of the base

* software.

* Permission to distribute the released version of the source code along

* with corresponding source modifications in the form of a patch file is

* granted with same provisions 2 through 4 for binary distributions.

* This software is provided "as is" without express or implied warranty

* to the extent permitted by applicable law.

]*/

* This file is included by ../term.c and ../docs/termdoc.c.

* This terminal driver supports:

* Computer Graphics Metafile

* TODO

* better control over plot size (never cutting off labels, correct font

* sizes)

* REFERENCES

* ISO 8632-1:1992 Computer Graphics Metafile (CGM), Part 1,

* Functional Specification.

* ISO 8632-1:1992 Computer Graphics Metafile (CGM), Part 3,

* Binary Encoding.

* FIPS PUB 128 - Computer Graphics Metafile (CGM).

* MIL-STD-2301A Computer Graphics Metafile (CGM) Implementation

* Standard for the National Imagery Transmission Format Standard, 5

* June 1998, http://164.214.2.51/ntb/baseline/docs/2301a/. Only a

* subset of CGM version 1, but does include the binary format for

* that subset.

* MIL-D-28003A "Digital Representation for Communication of

* Illustration Data: CGM Application Profile", 15 November 1991,

* http://www-cals.itsi.disa.mil/core/standards/28003aa1.pdf.

* "The computer graphics metafile", Lofton R. Henderson and Anne

* M. Mumford, Butterworths, London, 1990, ISBN 0-408-02680-4.

* AUTHOR

* Jim Van Zandt <jrvz@comcast.net>

* send your comments or suggestions to the author or

* gnuplot-info@lists.sourceforge.net.

#include "driver.h"

#ifdef TERM_REGISTER

register_term(cgm)

#endif

#ifdef TERM_PROTO

TERM_PUBLIC void CGM_options __PROTO((void));

TERM_PUBLIC void CGM_init __PROTO((void));

TERM_PUBLIC void CGM_reset __PROTO((void));

TERM_PUBLIC void CGM_text __PROTO((void));

TERM_PUBLIC void CGM_graphics __PROTO((void));

TERM_PUBLIC void CGM_move __PROTO((unsigned int x, unsigned int y));

TERM_PUBLIC void CGM_dashed_vector __PROTO((unsigned int ux, unsigned int uy));

TERM_PUBLIC void CGM_solid_vector __PROTO((unsigned int ux, unsigned int uy));

TERM_PUBLIC void CGM_linetype __PROTO((int linetype));

TERM_PUBLIC void CGM_linecolor __PROTO((int color));

TERM_PUBLIC void CGM_dashtype __PROTO((int dashtype));

TERM_PUBLIC void CGM_linewidth __PROTO((double width));

TERM_PUBLIC void CGM_put_text __PROTO((unsigned int x, unsigned int y,

const char *str));

TERM_PUBLIC int CGM_text_angle __PROTO((int ang));

TERM_PUBLIC int CGM_justify_text __PROTO((enum JUSTIFY mode));

TERM_PUBLIC int CGM_set_font __PROTO((const char *font));

TERM_PUBLIC void CGM_point __PROTO((unsigned int x, unsigned int y,

int number));

TERM_PUBLIC void CGM_fillbox __PROTO((int style, unsigned int x1, unsigned int y1,

unsigned int width, unsigned int height));

TERM_PUBLIC int CGM_make_palette __PROTO((t_sm_palette *palette));

TERM_PUBLIC void CGM_set_color __PROTO((t_colorspec *));

TERM_PUBLIC void CGM_filled_polygon __PROTO((int points, gpiPoint *corner));

TERM_PUBLIC void CGM_set_pointsize __PROTO((double size));

#define FATAL(msg) { fprintf(stderr, "%s\nFile %s line %d\n", msg, __FILE__, __LINE__); exit(EXIT_FAILURE); }

#define CGM_LARGE 32767

#define CGM_SMALL 32767/18*13 /* aspect ratio 1:.7222 */

#define CGM_MARGIN (CGM_LARGE/180)

/* convert from plot units to pt */

#define CGM_PT ((term->xmax + CGM_MARGIN)/cgm_plotwidth)

#define CGM_LINE_TYPES 9 /* number of line types we support */

#define CGM_COLORS 96 /* must not exceed size of pm3d_color_names_tbl[] */

#define CGM_POINTS 13 /* number of markers we support */

#define CGM_MAX_SEGMENTS 16382 /* maximum # polyline coordinates */

#define CGM_VCHAR (CGM_SMALL/360*12)

#define CGM_HCHAR (CGM_SMALL/360*12*5/9)

#define CGM_VTIC (CGM_LARGE/80)

#define CGM_HTIC (CGM_LARGE/80)

#endif

#ifndef TERM_PROTO_ONLY

#ifdef TERM_BODY

static int CGM_find_font __PROTO((const char *name, int len, double *relwidth));

static int CGM_find_nearest_color __PROTO((t_colorspec *colorspec));

* on NeXTstep, id is an identifier (in ObjC) and causes a parse error

* since some asserts below are mistaken as casts. datum is a type

* defined in ndbm.h which also causes a parse error (ndbm.h is

* included as part of appkit.h, I think). Strangely enough, both

* errors only happen with cpp-precomp -smart, not with the regular

* cpp. (AL)

#ifdef NEXT

#define id id_

#define datum datum_

#endif

#include <ctype.h> /* for isspace() */

#ifndef assert

#define assert(x) 0 /* defeat assertions */

#endif

/* uncomment the following to enable assertions for this module only,

regardless of compiler switches

#ifdef NDEBUG

#define DEFEAT_ASSERTIONS

#endif

#undef NDEBUG

#include <assert.h>

#define CGM_ADJ (sizeof(int)/sizeof(short))

static unsigned int cgm_posx;

static unsigned int cgm_posy;

static unsigned int cgm_linetype = 1;

static unsigned int cgm_linetypes = CGM_LINE_TYPES + 3;

static unsigned int cgm_dashtype = 0;

static unsigned int cgm_color = 0;

static int *cgm_polyline; /* stored polyline coordinates */

static int cgm_coords = 0; /* # polyline coordinates saved */

static int cgm_doing_polygon = 0; /* nonzero if creating polygon, else

* creating polyline */

/* static enum JUSTIFY cgm_justify = LEFT; */ /* unused */

static int cgm_step_sizes[8]; /* array of currently used dash

lengths in plot units */

static int cgm_step_index = 0; /* index into cgm_step_sizes[] */

static int cgm_step = 0; /* amount of current dash not yet

drawn, in plot units */

static int cgm_tic, cgm_tic707, cgm_tic866, cgm_tic500, cgm_tic1241, cgm_tic1077, cgm_tic621; /* marker dimensions */

struct cgm_properties {

double angle; /* angle of text baseline (radians

counter-clockwise from horizontal) */

int font_index; /* font index */

int char_height; /* character height in picture units */

enum JUSTIFY justify_mode; /* how text is justified */

int edge_visibility; /* nonzero if edge is visible */

int edge_color;

int fill_color;

int interior_style;

int hatch_index;

};

static struct cgm_properties

cgm_current={-1,-1,-1,(enum JUSTIFY)-1,-1,-1,-1,-1,-1}, /* written to file */

cgm_next={0,-2,-2,LEFT,-2,-2,-2,-1,-1}, /* needed for next text string/marker */

cgm_reset={-1,-1,-1,(enum JUSTIFY)-1,-1,-1,-1,-1,-1}; /* invalid entries */

static int cgm_user_color_count = 0;

static int cgm_user_color_max = 0;

static int cgm_smooth_colors = 0;

static int GPFAR *cgm_user_color_table = (int GPFAR*)0;

static int cgm_maximum_color_index = 255; /* Size of color table we will write */

struct fontdata {

char *name; /* the name of the font */

double width; /* the width of the font, relative to

Times Bold Italic. The width

adjustment can only be approximate.

Of the standard fonts, only the

four versions of "Courier" are

monospaced. Also, metrics of the

same font from different foundaries

are sometimes different. */

};

static struct fontdata cgm_basic_font_data[]={

/* these are WebCGM recommended fonts */

{"Helvetica",1.039},

{"Helvetica Oblique",1.099},

{"Helvetica Bold",1.083},

{"Helvetica Bold Oblique",1.011},

{"Times Roman",.981},

{"Times Bold",.985},

{"Times Italic",.959},

{"Times Bold Italic",1.0},

{"Courier",1.327},

{"Courier Bold",1.327},

{"Courier Oblique",1.218},

{"Courier Bold Oblique",1.341},

{"Symbol",.897},

/* These are basic public domain fonts required by MIL-D-28003A */

{"Hershey/Cartographic_Roman",1.2404},

{"Hershey/Cartographic_Greek",.9094},

{"Hershey/Simplex_Roman",1.2369},

{"Hershey/Simplex_Greek",.9129},

{"Hershey/Simplex_Script",1.4181},

{"Hershey/Complex_Roman",1.1150},

{"Hershey/Complex_Greek",.9059},

{"Hershey/Complex_Script",1.3868},

{"Hershey/Complex_Italic",1.4146},

{"Hershey/Complex_Cyrillic",1.2056},

{"Hershey/Duplex_Roman",1.1707},

{"Hershey/Triplex_Roman",1.3240},

{"Hershey/Triplex_Italic",1.3310},

{"Hershey/Gothic_German",1.2056},

{"Hershey/Gothic_English",1.2021},

{"Hershey/Gothic_Italian",1.2021},

{"Hershey/Symbol_Set_1",.9059},

{"Hershey/Symbol_Set_2",.9059},

{"Hershey/Symbol_Math",.9059},

/* These are available in the Microsoft Office import filter. By

default, the script font can apparently be accessed only via

the name "15". */

{"ZapfDingbats",1.583},

{"Script",1.139},

{"15",1.139},

/* in the Microsoft Office and Corel Draw import filters, these

are pseudonyms for some of the above */

{"Helvetica Italic",1.099},

{"Helvetica Bold Italic",1.011},

{"Courier Italic",1.218},

{"Courier Bold Italic",1.341},

{"Times Oblique",.959},

{"Times Bold Oblique",1.0},

{0,0}

};

static struct fontdata *cgm_font_data = cgm_basic_font_data;

#define DEFAULT_CGMFONT "Helvetica Bold"

static char CGM_default_font[MAX_ID_LEN+1] = {'\0'};

/* variables to record the options */

static char cgm_font[32] = DEFAULT_CGMFONT;

static unsigned int cgm_fontsize = 12;

static unsigned cgm_linewidth; /* line width in plot units */

static unsigned cgm_linewidth_pt = 1; /* line width in pt */

static TBOOLEAN cgm_monochrome = FALSE; /* colors enabled? */

static int cgm_plotwidth = 432; /* assumed width of plot in pt. */

static TBOOLEAN cgm_portrait = FALSE; /* portrait orientation? */

static TBOOLEAN cgm_rotate = TRUE; /* text rotation enabled? */

static TBOOLEAN cgm_dashed = TRUE; /* dashed linestyles enabled? */

static TBOOLEAN cgm_nofontlist_mode = FALSE; /* omit font list? */

/* prototypes for static functions */

static void CGM_local_reset __PROTO((void));

static void CGM_flush_polyline __PROTO((void));

static void CGM_flush_polygon __PROTO((void));

static void CGM_write_char_record __PROTO((int class, int cgm_id, int length,

char *data));

static void CGM_write_code __PROTO((int class, int cgm_id, int length));

static void CGM_write_int __PROTO((int value));

static void CGM_write_int_record __PROTO((int class, int cgm_id, int length,

int *data));

static void CGM_write_mixed_record __PROTO((int class, int cgm_id,

int numint, int *int_data,

int numchar, const char *char_data));

static void CGM_write_byte_record __PROTO((int class, int cgm_id, int length,

char *data));

enum CGM_id {

/* cgm mode */

CGM_PORTRAIT, CGM_LANDSCAPE, CGM_DEFAULT,

/* color */

CGM_MONOCHROME, CGM_COLOR,

/* rotation */

CGM_ROTATE, CGM_NOROTATE,

CGM_DASHED, CGM_SOLID,

CGM_LINEWIDTH, CGM_WIDTH, CGM_NOFONTLIST, CGM_OTHER

};

static struct gen_table CGM_opts[] =

{

{ "p$ortrait", CGM_PORTRAIT },

{ "la$ndscape", CGM_LANDSCAPE },

{ "de$fault", CGM_DEFAULT },

{ "nof$ontlist", CGM_NOFONTLIST },

{ "win$word6", CGM_NOFONTLIST }, /* deprecated */

{ "m$onochrome", CGM_MONOCHROME },

{ "c$olor", CGM_COLOR },

{ "c$olour", CGM_COLOR },

{ "r$otate", CGM_ROTATE },

{ "nor$otate", CGM_NOROTATE },

{ "da$shed", CGM_DASHED },

{ "s$olid", CGM_SOLID },

{ "li$newidth", CGM_LINEWIDTH },

{ "lw", CGM_LINEWIDTH },

{ "wid$th", CGM_WIDTH },

{ NULL, CGM_OTHER }

};

TERM_PUBLIC void

CGM_options()

{

char *string;

/* Annoying hack to handle the case of 'set termoption' after */

/* we have already initialized the terminal. */

if (c_token != 2)

CGM_local_reset();

while (!END_OF_COMMAND) {

switch(lookup_table(&CGM_opts[0],c_token)) {

case CGM_PORTRAIT:

cgm_portrait = TRUE;

c_token++;

break;

case CGM_LANDSCAPE:

cgm_portrait = FALSE;

c_token++;

break;

case CGM_DEFAULT:

CGM_local_reset();

c_token++;

break;

case CGM_NOFONTLIST:

cgm_nofontlist_mode = TRUE;

c_token++;

break;

case CGM_MONOCHROME:

cgm_monochrome = TRUE;

c_token++;

break;

case CGM_COLOR:

cgm_monochrome = FALSE;

c_token++;

break;

case CGM_ROTATE:

cgm_rotate = TRUE;

c_token++;

break;

case CGM_NOROTATE:

cgm_rotate = FALSE;

c_token++;

break;

case CGM_DASHED:

cgm_dashed = TRUE;

c_token++;

break;

case CGM_SOLID:

cgm_dashed = FALSE;

c_token++;

break;

case CGM_LINEWIDTH:

c_token++;

if (!END_OF_COMMAND) {

cgm_linewidth_pt = int_expression();

if (cgm_linewidth_pt == 0 || cgm_linewidth_pt > 10000) {

int_warn(c_token,"linewidth out of range");

cgm_linewidth_pt = 1;

}

break;

case CGM_WIDTH:

c_token++;

if (!END_OF_COMMAND) {

cgm_plotwidth = int_expression();

if (cgm_plotwidth < 0 || cgm_plotwidth > 10000) {

int_warn(c_token,"width out of range");

cgm_plotwidth = 6 * 72;

}

break;

case CGM_OTHER:

default:

string = gp_input_line + token[c_token].start_index;

if (string[0] == 'x') { /* set color */

unsigned short red, green, blue;

if (sscanf(string, "x%2hx%2hx%2hx", &red, &green, &blue ) != 3)

int_error(c_token, "invalid color spec, must be xRRGGBB");

if (cgm_user_color_count >= cgm_user_color_max) {

cgm_user_color_max = cgm_user_color_max*2 + 4;

cgm_user_color_table =

gp_realloc(cgm_user_color_table,

(cgm_user_color_max*3+1)*sizeof(int),

"CGM color table");

/* 1st table entry is the minimum color index value */

cgm_user_color_table[0] = 0;

}

cgm_user_color_table[1 + 3*cgm_user_color_count] = red;

cgm_user_color_table[2 + 3*cgm_user_color_count] = green;

cgm_user_color_table[3 + 3*cgm_user_color_count] = blue;

cgm_user_color_count++;

++c_token;

} else {

if (equals(c_token,"font"))

c_token++;

if (isstringvalue(c_token)) {

double relwidth;

int font_index;

char *s = try_to_get_string();

char *comma = strchr(s,',');

if (comma && (1 == sscanf(comma+1,"%d",&cgm_fontsize)))

*comma = '\0';

if (*s)

font_index = CGM_find_font(s, strlen(s), &relwidth);

else

font_index = CGM_find_font(cgm_font, strlen(cgm_font), &relwidth);

if (font_index == 0) {

/* insert the font in the font table */

struct fontdata *new_font_data;

int i, n;

for (n=0; cgm_font_data[n].name; n++)

;

new_font_data = gp_alloc((n + 2)*sizeof(struct fontdata), "CGM font list");

new_font_data->name = s;

/* punt, since we don't know the real font width */

new_font_data->width = 1.0;

for (i = 0; i <= n; i++)

new_font_data[i+1] = cgm_font_data[i];

cgm_font_data = new_font_data;

font_index = 1;

} else

free(s);

strncpy(cgm_font, cgm_font_data[font_index-1].name, sizeof(cgm_font));

} else {

/* the user is specifying the font size */

cgm_fontsize = int_expression();

}

break;

}

if (cgm_portrait) {

term->xmax = CGM_SMALL - CGM_MARGIN;

term->ymax = CGM_LARGE - CGM_MARGIN;

} else {

term->xmax = CGM_LARGE - CGM_MARGIN;

term->ymax = CGM_SMALL - CGM_MARGIN;

}

{ /* cgm_font, cgm_fontsize, and/or term->v_char may have changed */

double w;

CGM_find_font(cgm_font, strlen(cgm_font), &w);

term->v_char = (unsigned int) (cgm_fontsize*CGM_PT);

term->h_char = (unsigned int) (cgm_fontsize*CGM_PT*.527*w);

}

sprintf(CGM_default_font, "%s,%d", cgm_font, cgm_fontsize);

/* CGM_default_font holds the font and size set at 'set term' */

sprintf(term_options, "%s %s %s %s %s width %d linewidth %d \"%s\" %d",

cgm_portrait ? "portrait" : "landscape",

cgm_monochrome ? "monochrome" : "color",

cgm_rotate ? "rotate" : "norotate",

cgm_dashed ? "dashed" : "solid",

cgm_nofontlist_mode ? "nofontlist" : "",

cgm_plotwidth,

cgm_linewidth_pt,

cgm_font, cgm_fontsize);

if (cgm_user_color_count) {

int i, red, green, blue;

for (i = 0; i < cgm_user_color_count &&

(strlen(term_options) + 9 < MAX_LINE_LEN); i++) {

red = cgm_user_color_table[1 + 3*i];

green = cgm_user_color_table[2 + 3*i];

blue = cgm_user_color_table[3 + 3*i];

sprintf(term_options + strlen(term_options),

" x%02x%02x%02x", red, green, blue);

}

if (cgm_user_color_count < CGM_COLORS) {

int i, j;

/* fill in colors not set by the user with the default colors */

/* 1st table entry is the minimum color index value */

cgm_user_color_table = gp_realloc(cgm_user_color_table,

(CGM_COLORS * 3 + 1) * sizeof (int), "CGM color table");

cgm_user_color_table[0] = 0;

for (i = cgm_user_color_count, j = cgm_user_color_count * 3;

i < CGM_COLORS; i++, j+=3) {

cgm_user_color_table[j+1] = (pm3d_color_names_tbl[i].value >> 16) & 0xff;

cgm_user_color_table[j+2] = (pm3d_color_names_tbl[i].value >> 8) & 0xff;

cgm_user_color_table[j+3] = (pm3d_color_names_tbl[i].value ) & 0xff;

}

cgm_user_color_count = CGM_COLORS;

}

static void

CGM_local_reset()

{

double w;

strcpy(cgm_font, DEFAULT_CGMFONT);

CGM_find_font(cgm_font, strlen(cgm_font), &w);

cgm_fontsize = 12;

term->v_char = (unsigned int) (cgm_fontsize * CGM_PT);

term->h_char = (unsigned int) (cgm_fontsize * CGM_PT * .527 * w);

cgm_linewidth_pt = 1;

cgm_monochrome = FALSE;

cgm_plotwidth = 6 * 72;

cgm_portrait = FALSE;

cgm_rotate = TRUE;

cgm_dashed = TRUE;

cgm_nofontlist_mode = FALSE;

cgm_current = cgm_reset;

cgm_user_color_count = 0;

}

TERM_PUBLIC void

CGM_init()

{

cgm_posx = cgm_posy = 0;

cgm_linetype = 0;

cgm_next.angle = 0;

cgm_next.interior_style = 1;

cgm_next.hatch_index = 1;

cgm_polyline = gp_alloc(CGM_MAX_SEGMENTS*sizeof(int),"cgm polylines");

}

TERM_PUBLIC void

CGM_graphics()

{

static int version_data[] = { 1 };

static int vdc_type_data[] = { 0 };

static int integer_precision_data[] = { 16 };

static int real_precision_data[] = { 1, 16, 16 };

static int index_precision_data[] = { 16 };

static int color_precision_data[] = { 16 };

static int color_index_precision_data[] = { 16 };

static int scaling_mode_data[] = { 0, 0, 0 };

static int color_value_extent_data[] = { 0, 0, 0, 255, 255, 255 };

static int color_selection_mode_data[] = { 0 };

static int linewidth_specification_mode_data[] = { 0 };

static int edge_width_specification_mode_data[] = { 0 };

static int marker_size_specification_mode_data[] = { 0 };

static int vdc_extent_data[] = { 0, 0, 0, 0 };

static int line_type_data[] = { 1 };

static int interior_style_data[] = { 1 }; /* 0=hollow 1=filled

* 2=pattern 3=hatch

* 4=empty */

static int hatch_index_data[] = { 1 }; /* 1=horizontal 2=vertical

* 3=positive slope

* 4=negative slope

* 5=horizontal/vertical

* crosshatch

* 6=positive/negative

* slope crosshatch */

static int GPFAR elements_list_data[] =

{

0, /* will be set to # elements in this list */

0, 1, /* Begin Metafile */

0, 2, /* End Metafile */

0, 3, /* Begin Picture */

0, 4, /* Begin Picture Body */

0, 5, /* End Picture */

1, 1, /* Metafile Version */

1, 2, /* Metafile Description */

1, 3, /* VDC Type */

1, 4, /* Integer Precision */

1, 5, /* Real Precision */

1, 6, /* Index Precision */

1, 7, /* Color Precision */

1, 8, /* Color Index Precision */

1, 9, /* Maximum Color Index */

1, 10, /* Color Value Extent */

1, 13, /* Font List */

2, 1, /* Scaling Mode */

2, 2, /* Color Selection Mode */

2, 3, /* Line Width Specification Mode */

2, 4, /* Marker Size Specification Mode */

2, 5, /* Edge Width Specification Mode */

2, 6, /* VDC Extent */

#ifdef NEVER

/* disabled due to complaints from CGM import filters */

3, 1, /* VDC Integer Precision */

3, 4, /* Transparency */

3, 6, /* Clip Indicator */

#endif

4, 1, /* Polyline */

4, 3, /* Polymarker */

4, 4, /* Text */

4, 7, /* Polygon */

4, 11, /* Rectangle */

4, 12, /* Circle */

4, 15, /* Circular Arc Center */

4, 16, /* Circular Arc Center Close */

4, 17, /* Ellipse */

4, 18, /* Elliptical Arc */

4, 19, /* Elliptical Arc Close */

5, 2, /* Line Type */

5, 3, /* Line Width */

5, 4, /* Line Color */

5, 6, /* Marker Type */

5, 7, /* Marker Size */

5, 8, /* Marker Color */

5, 10, /* Text Font Index */

5, 14, /* Text Color */

5, 15, /* Character Height */

5, 16, /* Character Orientation */

5, 18, /* Text Alignment */

5, 22, /* Interior Style */

5, 23, /* Fill Color */

5, 24, /* Hatch Index */

5, 27, /* Edge Type */

5, 28, /* Edge Width */

5, 29, /* Edge Color */

5, 30, /* Edge Visibility */

5, 34, /* Color Table */

6, 1, /* Escape */

7, 2 /* Application Data */

};

/* metafile description (class 1), including filename if available */

if (!outstr)

CGM_write_char_record(0, 1, 1, outstr);

else

CGM_write_char_record(0, 1, strlen(outstr) + 1, outstr);

CGM_write_int_record(1, 1, 2, version_data);

{

char description_data[256];

sprintf(description_data, "\

Gnuplot version %s patchlevel %s,\

Computer Graphics Metafile version 1 per MIL-D-28003A/BASIC-1.%d",

gnuplot_version, gnuplot_patchlevel, cgm_monochrome?0:2);

CGM_write_char_record(1, 2, strlen(description_data),

description_data);

}

elements_list_data[0] = (sizeof(elements_list_data) / CGM_ADJ - 2) / 4;

CGM_write_int_record(1, 11, sizeof(elements_list_data) / CGM_ADJ,

elements_list_data);

CGM_write_int_record(1, 3, 2, vdc_type_data);

CGM_write_int_record(1, 4, 2, integer_precision_data);

CGM_write_int_record(1, 5, 6, real_precision_data);

CGM_write_int_record(1, 6, 2, index_precision_data);

CGM_write_int_record(1, 7, 2, color_precision_data);

CGM_write_int_record(1, 8, 2, color_index_precision_data);

CGM_write_int_record(1, 9, 2, &cgm_maximum_color_index);

CGM_write_int_record(1, 10, sizeof(color_value_extent_data) / CGM_ADJ,

color_value_extent_data);

if (cgm_nofontlist_mode == FALSE)

{

char *buf, *s;

int i, lgh = 0;

for (i = 0; cgm_font_data[i].name; i++)

lgh += strlen(cgm_font_data[i].name) + 1;

buf = gp_alloc(lgh + 1, "CGM font list");

for (s = buf, i = 0; cgm_font_data[i].name; i++)

{

int lgh = strlen(cgm_font_data[i].name);

*s++ = (char)lgh;

strcpy(s, cgm_font_data[i].name);

s += lgh;

}

CGM_write_byte_record(1, 13, lgh, buf);

free(buf);

}

/* picture description (classes 2 and 3) */

CGM_write_char_record(0, 3, 8, "PICTURE1");

CGM_write_int_record(2, 1, 6, scaling_mode_data);

CGM_write_int_record(2, 2, 2, color_selection_mode_data);

CGM_write_int_record(2, 3, 2, linewidth_specification_mode_data);

CGM_write_int_record(2, 4, 2, marker_size_specification_mode_data);

CGM_write_int_record(2, 5, 2, edge_width_specification_mode_data);

vdc_extent_data[2] = t->xmax + CGM_MARGIN;

vdc_extent_data[3] = t->ymax + CGM_MARGIN;

CGM_write_int_record(2, 6, 8, vdc_extent_data);

/* picture body (classes 4 and 5) */

CGM_write_int_record(0, 4, 0, NULL);

#ifdef NEVER /* no need for these, since we accept the defaults */

{

static int vdc_integer_precision_data[] = { 16 };

CGM_write_int_record(3, 1, 2, vdc_integer_precision_data);

}

{

static int transparency_data[] = { 1 }; /* text background:

0=auxiliary color

1=transparent */

CGM_write_int_record(3, 4, sizeof(transparency_data) / CGM_ADJ,

transparency_data);

}

{

static int clip_indicator_data[] = { 0 };

CGM_write_int_record(3, 6, sizeof(clip_indicator_data) / CGM_ADJ,

clip_indicator_data);

}

#endif

if (!cgm_monochrome)

CGM_write_int_record(5, 34, (cgm_user_color_count*3+1)*

sizeof(cgm_user_color_table[0])/CGM_ADJ,

cgm_user_color_table);

CGM_write_int_record(5, 2, sizeof(line_type_data) / CGM_ADJ,

line_type_data); /* line type 1=SOLID */

cgm_linewidth = cgm_linewidth_pt * CGM_PT;

CGM_write_int_record(5, 3, sizeof(cgm_linewidth) / CGM_ADJ,

(int *) &cgm_linewidth); /* line width */

CGM_write_int_record(5, 28, sizeof(cgm_linewidth) / CGM_ADJ,

(int *) &cgm_linewidth); /* edge width */

CGM_write_int_record(5, 27, sizeof(line_type_data) / CGM_ADJ,

line_type_data); /* edge type 1=SOLID */

CGM_linecolor(0);

cgm_current = cgm_reset;

cgm_next.char_height = t->v_char;

CGM_write_int_record(5, 22, 2, interior_style_data);

CGM_write_int_record(5, 24, 2, hatch_index_data);

{

char buf[45];

sprintf(buf, "%.31s,%d", cgm_font, cgm_fontsize);

CGM_set_font(buf);

}

CGM_set_pointsize(pointsize);

/* Fill with background color if user has specified one */

if (!cgm_monochrome && cgm_user_color_count > 0) {

CGM_linecolor(LT_BACKGROUND);

CGM_fillbox(FS_SOLID, 0, 0, t->xmax, t->ymax);

}

/* Return the index for the font with the name `name'. The index for

the first font is 1. Set relwidth to the width of the font,

relative to Times Bold Italic. If the font is not in the table,

set *relwidth to 1.0 and return 0. */

static int

CGM_find_font(const char *name, int numchar, double *relwidth)

{

int i;

*relwidth = 1.;

for (i=0; cgm_font_data[i].name; i++)

/* strncasecmp is not standard, but defined by stdfn.c if not available */

if (strlen(cgm_font_data[i].name) == numchar &&

strncasecmp(name, cgm_font_data[i].name, numchar) == 0)

{

*relwidth = cgm_font_data[i].width;

return i+1;

}

return 0;

}

TERM_PUBLIC int

CGM_set_font(const char *font)

{

int size, font_index;

char *comma = strchr(font, ',');

int len;

double width;

/* Allow null string to indicaute default font */

if (!font || !(*font))

font = CGM_default_font;

/* find font in font table, or use 1st font */

if (comma)

len = comma - font;

else

len = strlen(font);

font_index = CGM_find_font(font, len, &width);

if (font_index == 0)

font_index = 1;

cgm_next.font_index = font_index;

{

char *s = cgm_font_data[font_index-1].name;

len = strlen(s);

if (len > 31)

len = 31;

strncpy(cgm_font, s, len);

cgm_font[len] = NUL;

}

/* set font size */

size = cgm_fontsize;

if (comma)

sscanf(comma + 1, "%d", &size);

t->v_char = size * CGM_PT;

t->h_char = size * CGM_PT * .527 * width;

cgm_next.char_height = t->v_char;

return TRUE;

}

TERM_PUBLIC void

CGM_text()

{

CGM_flush_polyline();

CGM_write_int_record(0, 5, 0, NULL); /* end picture */

CGM_write_int_record(0, 2, 0, NULL); /* end metafile */

}

TERM_PUBLIC void

CGM_linetype(int linetype)

{

if (linetype < LT_NODRAW)

linetype = LT_NODRAW;

if (linetype == cgm_linetype)

return;

cgm_linetype = linetype;

CGM_linecolor(linetype);

if (cgm_dashed) {

CGM_dashtype(linetype); /* DBT 10-8-98 use dashes */

} else {

/* dashes for gridlines, solid for everything else */

CGM_dashtype(linetype == -1 ? 2 : 0);

}

TERM_PUBLIC void

CGM_linecolor(int linecolor)

{

if (linecolor >= 0) {

/* subtract 2 due to linetypes -2 / -1 */

if (cgm_linetypes > 3)

linecolor %= (cgm_linetypes - 3);

else

linecolor = 0;

} else if (linecolor == LT_BACKGROUND && !cgm_monochrome) {

linecolor = -3;

} else if (linecolor <= LT_NODRAW)

return;

linecolor += 3;

if (cgm_monochrome)

cgm_color = linecolor = 1;

if (linecolor == cgm_color)

return;

cgm_color = linecolor;

cgm_next.fill_color = linecolor;

CGM_flush_polyline();

CGM_write_int_record(5, 4, 2, (int *) &cgm_color); /* line color */

CGM_write_int_record(5, 14, 2, (int *) &cgm_color); /* text color */

}

TERM_PUBLIC void

CGM_fillbox(

int style,

unsigned int x1, unsigned int y1,

unsigned int width, unsigned int height)

{

gpiPoint corner[5];

corner[0].x = x1; corner[0].y = y1;

corner[1].x = x1+width; corner[1].y = y1;

corner[2].x = x1+width; corner[2].y = y1+height;

corner[3].x = x1; corner[3].y = y1+height;

corner[4].x = x1; corner[4].y = y1;

corner->style = style;

CGM_filled_polygon(5, corner);

}

TERM_PUBLIC void

CGM_linewidth(double width)

{

int new_linewidth;

if (width <= 0)

width = 0.5;

new_linewidth = width * cgm_linewidth_pt * CGM_PT;

if (new_linewidth == cgm_linewidth)

return;

CGM_flush_polyline();

cgm_linewidth = new_linewidth;

CGM_write_int_record(5, 3, sizeof(cgm_linewidth) / CGM_ADJ,

(int *) &cgm_linewidth);

CGM_dashtype(cgm_dashtype); /* have dash lengths recalculated */

}

TERM_PUBLIC void

CGM_dashtype(int dashtype)

{

int i, j;

/* Each group of 8 entries in dot_length[] defines a dash

pattern. Entries in each group are alternately length of

whitespace and length of line, in units of 2/3 of the

linewidth. */

static int dot_length[CGM_LINE_TYPES * 8] =

{ /* 0 - solid */

5, 8, 5, 8, 5, 8, 5, 8, /* 1 - dashes */

5, 3, 5, 3, 5, 3, 5, 3, /* 2 - short dashes */

4, 1, 4, 1, 4, 1, 4, 1, /* 3 - dotted */

4, 8, 4, 1, 4, 8, 4, 1, /* 4 - dash-dot */

4, 9, 4, 1, 4, 1, 0, 0, /* 5 - dash-dot-dot */

4, 10, 4, 1, 4, 1, 4, 1, /* 6 - dash-dot-dot-dot */

4, 10, 4, 10, 4, 1, 0, 0, /* 7 - dash-dash-dot */

4, 10, 4, 10, 4, 1, 4, 1}; /* 8 - dash-dash-dot-dot */

if (dashtype == cgm_dashtype)

return;

cgm_dashtype = dashtype;

CGM_flush_polyline();

if (dashtype >= CGM_LINE_TYPES)

dashtype = dashtype % CGM_LINE_TYPES;

if (dashtype < 1) {

term->vector = CGM_solid_vector;

return;

}

term->vector = CGM_dashed_vector;

/* set up dash dimensions */

j = (dashtype - 1) * 8;

for (i = 0; i < 8; i++, j++) {

if (dot_length[j])

cgm_step_sizes[i] = (dot_length[j] * cgm_linewidth) * 2 / 3;

else

cgm_step_sizes[i] = 0;

}

/* first thing drawn will be a line */

cgm_step = cgm_step_sizes[1];

cgm_step_index = 1;

}

TERM_PUBLIC void

CGM_move(unsigned int x, unsigned int y)

{

if (x >= term->xmax)

x = term->xmax;

if (y >= term->ymax)

y = term->ymax;

if (x == cgm_posx && y == cgm_posy)

return;

CGM_flush_polyline();

cgm_posx = x;

cgm_posy = y;

}

TERM_PUBLIC int

CGM_make_palette(t_sm_palette *palette)

{

if (palette) {

View remainder of file in raw view

gnuplot/term/cgm.trm at 1993e3064376ce9bfb3eccbdfbcb17027795cee4 · gnuplot/gnuplot · GitHub

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