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/* Hello, Emacs, this is -*-C-*- */

/* GNUPLOT - texdraw.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.

* This terminal driver supports:

* The TEXDRAW macros for LaTeX.

* AUTHORS

* Khun Yee Fung. Modified from eepic.trm.

* clipper@csd.uwo.ca

* January 20, 1992

* Bastian Maerkisch

* send your comments or suggestions to (gnuplot-info@lists.sourceforge.net).

* This file contains the texdraw terminal driver, intended for use with the

* texdraw macro package for LaTeX. This is an alternative to the

* latex driver. You need texdraw.sty, and texdraw.tex in the texdraw package.

#include "driver.h"

#ifdef TERM_REGISTER

register_term(texdraw)

#endif

#ifdef TERM_PROTO

TERM_PUBLIC void TEXDRAW_init(void);

TERM_PUBLIC void TEXDRAW_options(void);

TERM_PUBLIC void TEXDRAW_graphics(void);

TERM_PUBLIC void TEXDRAW_text(void);

TERM_PUBLIC void TEXDRAW_reset(void);

TERM_PUBLIC void TEXDRAW_linetype(int linetype);

TERM_PUBLIC void TEXDRAW_dashtype(int dt, t_dashtype *custom_dash_pattern);

TERM_PUBLIC void TEXDRAW_linewidth(double linewidth);

TERM_PUBLIC void TEXDRAW_move(unsigned int x, unsigned int y);

TERM_PUBLIC void TEXDRAW_pointsize(double size);

TERM_PUBLIC void TEXDRAW_point(unsigned int x, unsigned int y, int number);

TERM_PUBLIC void TEXDRAW_vector(unsigned int ux, unsigned int uy);

TERM_PUBLIC void TEXDRAW_arrow(unsigned int sx, unsigned int sy,

unsigned int ex, unsigned int ey,

int head);

TERM_PUBLIC void TEXDRAW_put_text(unsigned int x, unsigned int y, const char str[]);

TERM_PUBLIC int TEXDRAW_justify_text(enum JUSTIFY mode);

TERM_PUBLIC int TEXDRAW_text_angle(float ang);

TERM_PUBLIC void TEXDRAW_set_color(t_colorspec *colorspec);

TERM_PUBLIC int TEXDRAW_make_palette(t_sm_palette *);

TERM_PUBLIC void TEXDRAW_set_color(t_colorspec *);

TERM_PUBLIC void TEXDRAW_fillbox(int style,

unsigned int x1, unsigned int y1,

unsigned int width, unsigned int height);

TERM_PUBLIC void TEXDRAW_filled_polygon(int points, gpiPoint *corners);

#define TEXDRAW_PTS_PER_INCH (72.27)

/* resolution of printer we expect to use */

#define DOTS_PER_INCH (300)

/* dot size in pt */

#define TEXDRAW_UNIT (TEXDRAW_PTS_PER_INCH/DOTS_PER_INCH)

/* 5 inches wide by 3 inches high (default) */

#define TEXDRAW_XMAX (5*DOTS_PER_INCH)

#define TEXDRAW_YMAX (3*DOTS_PER_INCH)

#define TEXDRAW_HTIC (5*DOTS_PER_INCH/72) /* (5./TEXDRAW_UNIT) */

#define TEXDRAW_VTIC (5*DOTS_PER_INCH/72) /* (5./TEXDRAW_UNIT) */

#define TEXDRAW_HCHAR (DOTS_PER_INCH*53/10/72) /* (5.3/TEXDRAW_UNIT) */

#define TEXDRAW_VCHAR (DOTS_PER_INCH*11/72) /* (11./TEXDRAW_UNIT) */

#define GOT_TEXDRAW_PROTO

#endif

#ifndef TERM_PROTO_ONLY

#ifdef TERM_BODY

/* terminate any line in progress */

static void TEXDRAW_endline(void);

/* determine gray level according to fillstyle */

static double TEXDRAW_fill_gray(int style);

static unsigned int TEXDRAW_posx;

static unsigned int TEXDRAW_posy;

static enum JUSTIFY TEXDRAW_justify = LEFT;

static enum JUSTIFY TEXDRAW_last_justify = LEFT;

static int TEXDRAW_angle = 0;

static float TEXDRAW_scalefactor = 0.2409;

static double TEXDRAW_xscale = 1.0, TEXDRAW_yscale = 1.0;

/* for DOTS point style */

#define TEXDRAW_TINY_DOT "\\htext{$\\cdot$}"

/* POINTS */

#define TEXDRAW_POINT_TYPES 15 /* we supply more point types */

static const char * TEXDRAW_points[TEXDRAW_POINT_TYPES] = {

"\\htext{%s$+$}",

"\\htext{%s$\\times$}",

"\\htext{%s$\\ast$}",

"\\rmove(0 -8)\\htext{%s$\\Box$}",

"\\htext{%s$\\blacksquare$}",

"\\htext{%s$\\circ$}",

"\\htext{%s$\\bullet$}",

"\\htext{%s$\\triangle$}",

"\\htext{%s$\\blacktriangle$}",

"\\htext{%s$\\triangledown$}",

"\\htext{%s$\\blacktriangledown$}",

"\\htext{%s$\\lozenge$}",

"\\htext{%s$\\blacklozenge$}",

"\\htext{%s$\\heartsuit$}",

"\\htext{%s$\\spadesuit$}",

};

/* LINES */

#define TEXDRAW_NUMLINES 5 /* number of linetypes below */

static const int TEXDRAW_lines[] = {

2, /* -2 border */

1, /* -1 axes */

2, /* 0 solid */

2, /* 1 solid */

2, /* 2 solid */

};

#define TEXDRAW_NUMPAT 5

static const int TEXDRAW_dashpat[][6] = {

{ 10, 6, 0, 0, 0, 0 },

{ 4, 8, 0, 0, 0, 0 },

{ 10, 6, 4, 6, 0, 0 },

{ 10, 6, 4, 6, 4, 6 },

};

/* The line type selected most recently */

static int TEXDRAW_last_type = 0;

/* current line type */

static int TEXDRAW_type;

/* are we in the middle of a line */

static TBOOLEAN TEXDRAW_inline = FALSE;

/* number of points in line so far */

static int TEXDRAW_linecount = 0;

/* max value for linecount */

#define TEXDRAW_LINEMAX 5

/* linewidth scale factor */

static double TEXDRAW_lw;

static double TEXDRAW_last_lw;

/* dashtype */

static int TEXDRAW_dt;

/* ARROWS */

static char TEXDRAW_arrow_type;

static int TEXDRAW_arrow_length;

static int TEXDRAW_arrow_width;

/* GRAY LEVEL */

static double TEXDRAW_gray;

static double TEXDRAW_last_gray;

/* OPTIONS */

static TBOOLEAN TEXDRAW_standalone = FALSE;

static TBOOLEAN TEXDRAW_rounded = TRUE;

static TBOOLEAN TEXDRAW_colortext = FALSE;

static TBOOLEAN TEXDRAW_psarrows = TRUE;

static TBOOLEAN TEXDRAW_texpoints = TRUE;

static size_units TEXDRAW_explicit_units = INCHES;

static double TEXDRAW_size_x = 5.;

static double TEXDRAW_size_y = 3.;

static double TEXDRAW_lw_scale = 1.;

static double TEXDRAW_ps = 1.;

static double TEXDRAW_background = 1.;

/* option names */

enum TEXDRAW_id { TEXDRAW_DEFAULT,

TEXDRAW_SIZE,

TEXDRAW_STANDALONE, TEXDRAW_INPUT,

TEXDRAW_BLACKTEXT, TEXDRAW_COLORTEXT,

TEXDRAW_ROUNDED, TEXDRAW_BUTT,

TEXDRAW_LINEWIDTH, TEXDRAW_POINTSCALE,

TEXDRAW_PSARROWS, TEXDRAW_GPARROWS,

TEXDRAW_TEXPOINTS, TEXDRAW_GPPOINTS,

TEXDRAW_BACKGROUND,

TEXDRAW_OTHER };

static struct gen_table TEXDRAW_opts[] =

{

{ "def$ault", TEXDRAW_DEFAULT },

{ "size", TEXDRAW_SIZE },

{ "stand$alone", TEXDRAW_STANDALONE },

{ "inp$ut", TEXDRAW_INPUT },

{ "b$lacktext", TEXDRAW_BLACKTEXT },

{ "colort$ext", TEXDRAW_COLORTEXT },

{ "colourt$ext", TEXDRAW_COLORTEXT },

{ "round$ed", TEXDRAW_ROUNDED },

{ "butt", TEXDRAW_BUTT },

{ "backg$round", TEXDRAW_BACKGROUND },

{ "lw", TEXDRAW_LINEWIDTH },

{ "linew$idth", TEXDRAW_LINEWIDTH },

{ "points$cale", TEXDRAW_POINTSCALE },

{ "ps", TEXDRAW_POINTSCALE },

{ "psarrows", TEXDRAW_PSARROWS },

{ "gparrows", TEXDRAW_GPARROWS },

{ "texpoints", TEXDRAW_TEXPOINTS },

{ "gppoints", TEXDRAW_GPPOINTS },

{ NULL, TEXDRAW_OTHER }

};

TERM_PUBLIC void

TEXDRAW_options()

{

char size_str[80] = "";

int bg;

while (!END_OF_COMMAND) {

switch ((enum TEXDRAW_id) lookup_table(&TEXDRAW_opts[0], c_token)) {

case TEXDRAW_DEFAULT:

TEXDRAW_standalone = FALSE;

TEXDRAW_rounded = TRUE;

TEXDRAW_colortext = TRUE;

TEXDRAW_psarrows = TRUE;

TEXDRAW_texpoints = TRUE;

TEXDRAW_lw_scale = TEXDRAW_ps = 1.;

TEXDRAW_background = 1.;

TEXDRAW_size_x = 5 ;

TEXDRAW_size_y = 3.;

term->xmax = TEXDRAW_size_x * DOTS_PER_INCH;

term->ymax = TEXDRAW_size_y * DOTS_PER_INCH;

term->v_char = TEXDRAW_VCHAR;

term->v_tic = TEXDRAW_VTIC;

break;

case TEXDRAW_SIZE: {

float width, height;

c_token++;

TEXDRAW_explicit_units = parse_term_size(&width, &height, INCHES);

TEXDRAW_size_x = width / gp_resolution;

TEXDRAW_size_y = height / gp_resolution;

term->xmax = TEXDRAW_size_x * DOTS_PER_INCH;

term->ymax = TEXDRAW_size_y * DOTS_PER_INCH;

term->v_char = TEXDRAW_VCHAR;

term->v_tic = TEXDRAW_VTIC;

break;

}

case TEXDRAW_STANDALONE:

TEXDRAW_standalone = TRUE;

c_token++;

break;

case TEXDRAW_INPUT:

TEXDRAW_standalone = FALSE;

c_token++;

break;

case TEXDRAW_COLORTEXT:

TEXDRAW_colortext = TRUE;

c_token++;

break;

case TEXDRAW_BLACKTEXT:

TEXDRAW_colortext = FALSE;

c_token++;

break;

case TEXDRAW_BUTT:

TEXDRAW_rounded = FALSE;

c_token++;

break;

case TEXDRAW_ROUNDED:

TEXDRAW_rounded = TRUE;

c_token++;

break;

case TEXDRAW_LINEWIDTH:

c_token++;

TEXDRAW_lw_scale = real_expression();

if (TEXDRAW_lw_scale < 0.0)

TEXDRAW_lw_scale = 1.0;

break;

case TEXDRAW_POINTSCALE:

c_token++;

TEXDRAW_ps = real_expression();

if (TEXDRAW_ps < 0.0)

TEXDRAW_ps = 1.0;

break;

case TEXDRAW_BACKGROUND: {

int background;

int red, green, blue;

c_token++;

background = parse_color_name();

red = (double)((background >> 16) & 0xff);

green = (double)((background >> 8) & 0xff);

blue = (double)( background & 0xff);

TEXDRAW_background = (red * 0.30 + green * 0.59 + blue * 0.11) / 255;

break;

}

case TEXDRAW_GPARROWS:

c_token++;

TEXDRAW_psarrows = FALSE;

break;

case TEXDRAW_PSARROWS:

c_token++;

TEXDRAW_psarrows = TRUE;

break;

case TEXDRAW_GPPOINTS:

c_token++;

TEXDRAW_texpoints = FALSE;

break;

case TEXDRAW_TEXPOINTS:

c_token++;

TEXDRAW_texpoints = TRUE;

break;

default:

int_error(c_token, "Unknown terminal option");

}

if (TEXDRAW_explicit_units == INCHES)

snprintf(size_str, sizeof(size_str), "size %.2fin, %.2fin", TEXDRAW_size_x, TEXDRAW_size_y);

else if (TEXDRAW_explicit_units == CM)

snprintf(size_str, sizeof(size_str), "size %.2fcm, %.2fcm", TEXDRAW_size_x * 2.54, TEXDRAW_size_y * 2.54);

// update terminal option string

bg = TEXDRAW_background * 255;

snprintf(term_options, MAX_LINE_LEN + 1,

"%s linewidth %.1f pointscale %.1f %stext "

"background \"#%02x%02x%02x\" "

"%sarrows %spoints %s",

TEXDRAW_rounded ? "rounded" : "butt",

TEXDRAW_lw_scale, TEXDRAW_ps,

TEXDRAW_colortext ? "color" : "black",

bg, bg, bg,

TEXDRAW_psarrows ? "ps" : "gp",

TEXDRAW_texpoints ? "tex" : "gp",

TEXDRAW_standalone ? "standalone" : "input");

}

TERM_PUBLIC void

TEXDRAW_init()

{

fputs("%% GNUPLOT: LaTeX using TEXDRAW macros\n", gpoutfile);

if (TEXDRAW_standalone) {

fputs(

"\\documentclass[a4paper,10pt]{article}\n"\

"\\usepackage{texdraw}\n"\

"\\usepackage{latexsym}\n"\

"\\usepackage{amssymb}\n"\

"\\usepackage{xcolor}\n"

"\\begin{document}\n",

gpoutfile);

}

TERM_PUBLIC void

TEXDRAW_graphics()

{

static char tdg1[] = "\

\\btexdraw\n\

\\ifx\\pathDEFINED\\relax\\else\\let\\pathDEFINED\\relax\n\

\\def\\QtGfr{\\ifx (\\TGre \\let\\YhetT\\cpath\\else\\let\\YhetT\\relax\\fi\\YhetT}\n\

\\def\\path (#1 #2){\\move (#1 #2)\\futurelet\\TGre\\QtGfr}\n\

\\def\\cpath (#1 #2){\\lvec (#1 #2)\\futurelet\\TGre\\QtGfr}\n\

\\fi\n\

\\drawdim pt\n\

\\setunitscale %2.2f\n\

\\linewd %d\n\

\\textref h:L v:C\n\

\\writeps{%d setlinecap} \\writeps{%d setlinejoin}\n";

if (TEXDRAW_standalone)

fputs("\\begin{figure}\n", gpoutfile);

fprintf(gpoutfile, tdg1,

TEXDRAW_scalefactor,

TEXDRAW_lines[2],

TEXDRAW_rounded ? 1 : 0, TEXDRAW_rounded ? 1 : 0

);

if (TEXDRAW_background == 1.) {

/* enforce bounding box */

fprintf(gpoutfile, "\\move (0 0) \\rmove (%d %d)\n",

term->xmax, term->ymax);

} else {

fprintf(gpoutfile, "\\move (0 0) \\rlvec (%d 0) \\rlvec (0 %d) \\rlvec (%d 0) \\ifill f:%0.2f\n",

term->xmax, term->ymax, - (int) term->xmax,

TEXDRAW_background);

}

TEXDRAW_last_type = 0;

TEXDRAW_type = 0;

TEXDRAW_posx = TEXDRAW_posy = 0;

TEXDRAW_lw = TEXDRAW_last_lw = 1.;

TEXDRAW_gray = TEXDRAW_last_gray = 0.;

TEXDRAW_arrow_type = 0;

TEXDRAW_arrow_length = -1;

TEXDRAW_arrow_width = -1;

TEXDRAW_justify = TEXDRAW_last_justify = LEFT;

}

TERM_PUBLIC void

TEXDRAW_text()

{

TEXDRAW_endline();

// fputs("\\drawbb\n", gpoutfile);

fputs("\\etexdraw\n", gpoutfile);

if (TEXDRAW_standalone)

fputs("\\end{figure}\n\n", gpoutfile);

}

TERM_PUBLIC void

TEXDRAW_reset()

{

TEXDRAW_endline();

TEXDRAW_posx = TEXDRAW_posy = 0;

if (TEXDRAW_standalone)

fputs("\\end{document}\n", gpoutfile);

}

TERM_PUBLIC void

TEXDRAW_linetype(int linetype)

{

TEXDRAW_endline();

if (linetype >= TEXDRAW_NUMLINES - 2)

linetype %= (TEXDRAW_NUMLINES - 2);

TEXDRAW_type = linetype > -2 ? linetype : LT_BLACK;

if (linetype == LT_AXIS)

TEXDRAW_dashtype(DASHTYPE_AXIS, NULL);

else

TEXDRAW_dashtype(DASHTYPE_SOLID, NULL);

}

TERM_PUBLIC void

TEXDRAW_dashtype(int dt, t_dashtype *custom_dash_pattern)

{

TEXDRAW_endline();

if (dt == DASHTYPE_SOLID) {

dt = 0;

} else if (dt == DASHTYPE_AXIS) {

dt = 2;

} else if (dt > 0) {

dt %= TEXDRAW_NUMPAT;

}

if (dt == TEXDRAW_dt)

return;

if (dt == 0) {

fputs("\\lpatt ()\n", gpoutfile);

TEXDRAW_dt = 0;

} else if (dt > 0) {

int i;

fputs("\\lpatt (", gpoutfile);

for (i = 0; i < 6; i++) {

if (TEXDRAW_dashpat[dt - 1][i] == 0)

break;

fprintf(gpoutfile, "%d ", (int) (TEXDRAW_dashpat[dt - 1][i] * TEXDRAW_lw));

}

fputs(")\n", gpoutfile);

TEXDRAW_dt = dt;

} else if (dt == DASHTYPE_CUSTOM) {

/* not supported (yet) */

}

TERM_PUBLIC void

TEXDRAW_linewidth(double linewidth)

{

TEXDRAW_lw = linewidth * TEXDRAW_lw_scale;

}

TERM_PUBLIC void

TEXDRAW_move(unsigned int x, unsigned int y)

{

TEXDRAW_endline();

TEXDRAW_posx = x;

TEXDRAW_posy = y;

}

TERM_PUBLIC void

TEXDRAW_pointsize(double size)

{

// We can only scale gnuplot's native point types

term_pointsize = (size >= 0 ? size * TEXDRAW_ps : 1);

}

TERM_PUBLIC void

TEXDRAW_point(unsigned int x, unsigned int y, int number)

{

char colorstr[80] = "";

TEXDRAW_move(x, y);

if (!TEXDRAW_texpoints) {

do_point(x, y, number);

return;

}

/* Print the character defined by 'number'; number < 0 means

* to use a dot, otherwise one of the defined points. */

fprintf(gpoutfile, "\\move (%d %d)\n",

(int) ((double) x * TEXDRAW_xscale),

(int) ((double) y * TEXDRAW_yscale));

if (TEXDRAW_last_justify != CENTRE) {

fprintf(gpoutfile, "\\textref h:C v:C ");

TEXDRAW_last_justify = CENTRE;

}

if (TEXDRAW_colortext && TEXDRAW_gray != 0)

snprintf(colorstr, sizeof(colorstr), "\\color{black!%d!}", 100 - (int) (TEXDRAW_gray * 100));

if (number < 0) {

fprintf(gpoutfile, "%s\n", TEXDRAW_TINY_DOT);

} else {

fprintf(gpoutfile, TEXDRAW_points[number % TEXDRAW_POINT_TYPES], colorstr);

fputc('\n', gpoutfile);

}

TERM_PUBLIC void

TEXDRAW_vector(unsigned int ux, unsigned int uy)

{

if (!TEXDRAW_inline) {

TEXDRAW_inline = TRUE;

/* Start a new line. This depends on line type */

if ((TEXDRAW_type != TEXDRAW_last_type) || (TEXDRAW_last_lw != TEXDRAW_lw)) {

if (TEXDRAW_lines[TEXDRAW_type + 2] * TEXDRAW_lw != TEXDRAW_lines[TEXDRAW_last_type + 2] * TEXDRAW_last_lw)

fprintf(gpoutfile, "\\linewd %d\n",

(int) (TEXDRAW_lines[TEXDRAW_type + 2] * TEXDRAW_lw + 0.5));

TEXDRAW_last_type = TEXDRAW_type;

TEXDRAW_last_lw = TEXDRAW_lw;

}

if (TEXDRAW_gray != TEXDRAW_last_gray) {

fprintf(gpoutfile, "\\setgray %0.2f\n", TEXDRAW_gray);

TEXDRAW_last_gray = TEXDRAW_gray;

}

fprintf(gpoutfile, "\\path (%d %d)",

(int) ((double) TEXDRAW_posx * TEXDRAW_xscale),

(int) ((double) TEXDRAW_posy * TEXDRAW_yscale));

TEXDRAW_linecount = 1;

} else {

/* Even though we are in middle of a path,

* we may want to start a new path command.

* If they are too long then latex will choke.

if (TEXDRAW_linecount++ >= TEXDRAW_LINEMAX) {

fputs("\n\\cpath ", gpoutfile);

TEXDRAW_linecount = 1;

}

fprintf(gpoutfile, "(%d %d)",

(int) ((double) ux * TEXDRAW_xscale),

(int) ((double) uy * TEXDRAW_yscale));

TEXDRAW_posx = ux;

TEXDRAW_posy = uy;

}

static void

TEXDRAW_endline()

{

if (TEXDRAW_inline) {

putc('\n', gpoutfile);

TEXDRAW_inline = FALSE;

}

TERM_PUBLIC void

TEXDRAW_arrow(

unsigned int sx, unsigned int sy,

unsigned int ex, unsigned int ey,

int head)

{

char text;

char type = 'T'; // empty triangle

// These are the default arrow sizes:

int tiplen = (0.16 * 72 / TEXDRAW_scalefactor + 0.5);

int width = (0.08 * 72 / TEXDRAW_scalefactor + 0.5);

// Texdraw cannot only draw vector heads, fall back to built-in code.

if (!TEXDRAW_psarrows || (head & HEADS_ONLY)) {

do_arrow(sx, sy, ex, ey, head);

return;

}

switch (curr_arrow_headfilled) {

case AS_NOFILL:

type = 'V'; // open V-shape

break;

case AS_FILLED:

case AS_NOBORDER:

type = 'F'; // filled triangle

break;

case AS_EMPTY:

type = 'W'; // white filled triangle

break;

}

if (curr_arrow_headlength > 0) {

width = sin(curr_arrow_headangle * DEG2RAD) * curr_arrow_headlength;

tiplen = cos(curr_arrow_headangle * DEG2RAD) * curr_arrow_headlength;

if ((curr_arrow_headbackangle - curr_arrow_headangle) <= 15)

type = 'V'; // open V-shape

}

if (TEXDRAW_arrow_type != type) {

fprintf(gpoutfile, "\\arrowheadtype t:%c\n", type);

TEXDRAW_arrow_type = type;

}

if ((TEXDRAW_arrow_length != tiplen) || (TEXDRAW_arrow_width != width)) {

fprintf(gpoutfile, "\\arrowheadsize l:%d w:%d\n", tiplen, width);

TEXDRAW_arrow_length = tiplen;

TEXDRAW_arrow_width = width;

}

if ((head & BOTH_HEADS) != 0)

text = 'a'; // line with arrow

else

text = 'l'; // simple line

if ((head & END_HEAD) != 0 || (head & BOTH_HEADS) == 0) {

fprintf(gpoutfile, "\\move (%d %d)\\%cvec (%d %d)\n",

(int) ((double) sx * TEXDRAW_xscale),

(int) ((double) sy * TEXDRAW_yscale),

text,

(int) ((double) ex * TEXDRAW_xscale),

(int) ((double) ey * TEXDRAW_yscale));

}

/* draw back-heads by drawing an arrow in the opposite direction */

if ((head & BACKHEAD) != 0) {

fprintf(gpoutfile, "\\move (%d %d)\\%cvec (%d %d)\n",

(int) ((double) ex * TEXDRAW_xscale),

(int) ((double) ey * TEXDRAW_yscale),

text,

(int) ((double) sx * TEXDRAW_xscale),

(int) ((double) sy * TEXDRAW_yscale));

}

TEXDRAW_posx = ex;

TEXDRAW_posy = ey;

}

TERM_PUBLIC void

TEXDRAW_put_text(unsigned int x, unsigned int y, const char str[])

{

char colorstr[80] = "";

TEXDRAW_endline();

fprintf(gpoutfile, "\\move (%d %d)",

(int) ((double) x * TEXDRAW_xscale),

(int) ((double) y * TEXDRAW_yscale));

if (TEXDRAW_last_justify != TEXDRAW_justify) {

TEXDRAW_last_justify = TEXDRAW_justify;

if (TEXDRAW_justify == LEFT)

fputs("\\textref h:L v:C ", gpoutfile);

else if (TEXDRAW_justify == CENTRE)

fputs("\\textref h:C v:C ", gpoutfile);

else if (TEXDRAW_justify == RIGHT)

fputs("\\textref h:R v:C ", gpoutfile);

}

if (TEXDRAW_colortext && TEXDRAW_gray != 0)

snprintf(colorstr, sizeof(colorstr), "\\color{black!%d!}", 100 - (int) (TEXDRAW_gray * 100));

if (TEXDRAW_angle == 0)

fprintf(gpoutfile, "\\htext{%s%s}\n", colorstr, str);

else if(TEXDRAW_angle == 90)

fprintf(gpoutfile, "\\vtext{%s%s}\n", colorstr, str);

else

fprintf(gpoutfile, "\\rtext td:%d {%s%s}\n", TEXDRAW_angle, colorstr, str);

}

TERM_PUBLIC int

TEXDRAW_justify_text(enum JUSTIFY mode)

{

TEXDRAW_justify = mode;

return (TRUE);

}

TERM_PUBLIC int

TEXDRAW_text_angle(float dang)

{

int ang = dang;

while (ang < 0) ang += 360;

ang %= 360;

TEXDRAW_angle = ang;

return (TRUE);

}

TERM_PUBLIC int

TEXDRAW_make_palette(t_sm_palette *palette)

{

return 0; /* claim continuous colors */

}

TERM_PUBLIC void

TEXDRAW_set_color(t_colorspec *colorspec)

{

/* Users can choose any color as long as it is black.

Enables dash patterns. */

switch (colorspec->type) {

case TC_FRAC:

TEXDRAW_gray = colorspec->value;

break;

case TC_RGB: {

int red, green, blue;

red = (colorspec->lt >> 16) & 0xff;

green = (colorspec->lt >> 8) & 0xff;

blue = (colorspec->lt ) & 0xff;

TEXDRAW_gray = (red * 0.30 + green * 0.59 + blue * 0.11) / 255;

break;

}

case TC_LT:

/* any line type is black for now */

TEXDRAW_gray = 0.;

break;

default:

break;

}

static double

TEXDRAW_fill_gray(int style)

{

double gray = TEXDRAW_gray;

int pattern = style >> 4;

int frac = style >> 4;

static const double TEXDRAW_pat_gray[4] = {

1.0, 0.5, 0.8, 0.0

};

switch (style & 0x0f) {

case FS_SOLID:

case FS_TRANSPARENT_SOLID:

if (frac < 100)

gray *= frac / 100.;

break;

case FS_PATTERN:

case FS_TRANSPARENT_PATTERN:

gray = TEXDRAW_pat_gray[pattern % 4];

break;

case FS_EMPTY:

gray = 1.0;

break;

case FS_DEFAULT:

default:

break;

}

return gray;

}

TERM_PUBLIC void

TEXDRAW_fillbox(int style,

unsigned int x1, unsigned int y1,

unsigned int width, unsigned int height)

{

double gray;

TEXDRAW_endline();

gray = TEXDRAW_fill_gray(style);

// outline box using relative moves

fprintf(gpoutfile, "\\move (%d %d)", x1, y1);

fprintf(gpoutfile, "\\rlvec (%d %d)", width, 0);

fprintf(gpoutfile, "\\rlvec (%d %d)", 0, height);

fprintf(gpoutfile, "\\rlvec (%d %d)", - (int) width, 0);

// the polygon is closed automatically by fill

fprintf(gpoutfile, "\\ifill f:%0.2f\n", gray);

}

TERM_PUBLIC void

TEXDRAW_filled_polygon(int points, gpiPoint *corners)

{

double gray;

int i;

TEXDRAW_endline();

gray = TEXDRAW_fill_gray(corners->style);

// outline polygon

fprintf(gpoutfile, "\\move (%d %d)", corners[0].x, corners[0].y);

for (i = 1; i < points; i++)

fprintf(gpoutfile, "\\lvec (%d %d)", corners[i].x, corners[i].y);

// fill polygon

fprintf(gpoutfile, "\\ifill f:%0.2f\n", gray);

}

#endif /* TERM_BODY */

#ifdef TERM_TABLE

TERM_TABLE_START(texdraw_driver)

"texdraw",

"LaTeX texdraw environment",

TEXDRAW_XMAX, TEXDRAW_YMAX, TEXDRAW_VCHAR, TEXDRAW_HCHAR,

TEXDRAW_VTIC, TEXDRAW_HTIC, TEXDRAW_options, TEXDRAW_init, TEXDRAW_reset,

TEXDRAW_text, null_scale, TEXDRAW_graphics, TEXDRAW_move, TEXDRAW_vector,

TEXDRAW_linetype, TEXDRAW_put_text, TEXDRAW_text_angle,

TEXDRAW_justify_text, TEXDRAW_point, TEXDRAW_arrow, set_font_null,

TEXDRAW_pointsize,

TERM_IS_LATEX | TERM_LINEWIDTH | TERM_POINTSCALE | TERM_MONOCHROME,

0 /*suspend*/, 0 /*resume*/,

TEXDRAW_fillbox,

TEXDRAW_linewidth,

#ifdef USE_MOUSE

0, 0, 0, 0, 0,

#endif

TEXDRAW_make_palette, 0,

TEXDRAW_set_color,

TEXDRAW_filled_polygon,

0, /* image */

0, 0, 0, /* enhanced text */

0, /* layer */

0, /* path */

0.0, /* scale (unused) */

0, /* hypertext */

TEXDRAW_dashtype

TERM_TABLE_END(texdraw_driver)

#undef LAST_TERM

#define LAST_TERM texdraw_driver

#endif /* TERM_TABLE */

#endif /* TERM_PROTO_ONLY */

#ifdef TERM_HELP

START_HELP(texdraw)

"1 texdraw",

"?commands set terminal texdraw",

"?set terminal texdraw",

"?set term texdraw",

"?terminal texdraw",

"?term texdraw",

"?texdraw",

" The `texdraw` terminal driver supports the (La)TeX texdraw environment. It is",

" intended for use with the texdraw package,",

" see https://www.ctan.org/tex-archive/graphics/texdraw/ .",

"",

" set terminal texdraw",

" {size <XX>{unit},<YY>{unit}}",

" {standalone | input}",

" {blacktext | colortext | colourtext}",

" {linewidth <lw>} {rounded | butt}",

" {pointscale <ps>}",

" {psarrows | gparrows} {texpoints | gppoints}",

" {background <rgbcolor>}",

"",

" Note: Graphics are in grayscale only. Text is always black. Boxes and polygons",

" are filled using solid gray levels only. Patterns are not available.",

"",

" Points, among other things, are drawn using the LaTeX commands \"\\Diamond\" and",

" \"\\Box\". These commands no longer belong to the LaTeX2e core; they are included",

" in the latexsym package, which is part of the base distribution and thus part",

" of any LaTeX implementation. Please do not forget to use this package.",

" Other point types use symbols from the amssymb package. For compatibility with",

" plain TeX you need to specify the `gppoints` option.",

"",

" `standalone` produces a LaTeX file with possibly multiple plots, ready",

" to be compiled. The default is `input` to produce a TeX file which can",

" be included.",

"",

" `blacktext` forces all text to be written in black. `colortext` enables",

" \"colored\" text. The default is `blacktext` and \"color\" means grayscale",

" really.",

"",

" `rounded` sets line caps and line joins to be rounded; `butt` sets butt",

" caps and mitered joins and is the default.",

"",

" `linewidth` and `pointscale` scale the width of lines and the size of point",

" symbols, respectively. `pointscale` only applies to `gppoints`.",

"",

" `psarrows` draws `arrow`s using TeXdraw commands which are shorter but do not",

" offer all options. `gparrows` selects drawing arrows using gnuplot's",

" own routine for full functionality instead. Similarly, `texpoints`, and ",

" `gppoints` select LaTeX symbols or gnuplot's point drawing routines."

END_HELP(texdraw)

#endif /* TERM_HELP */

gnuplot/term/texdraw.trm at master · gnuplot/gnuplot · GitHub

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