gnuplot-old/term/pdf.trm at gnuplot-4-4-alpha · gnuplot/gnuplot-old · GitHub

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

* $Id: pdf.trm,v 1.83 2009/03/26 00:49:22 sfeam Exp $

/*------------------------------

GNUPLOT - pdf.trm

This file is included by ../term.c.

This driver uses PDFlib from www.pdflib.com

Author:

Hans-Bernhard Br"oker

broeker@physik.rwth-aachen.de

Licence: see the gnuplot copyright (to be merged into here...)

Options: can #define PDF_DONT_COMPRESS to avoid PDF output

generated being compressed (by the 'deflate' algorithm as used

in 'zip' or 'gzip'). That helps in debugging.

------------------------------*/

/* CODEME: Add patterned lines (?). */

/* PM3D support by Johannes Zellner <johannes@zellner.org>, May-15-2002 */

/* set_color fixes by Petr Mikulik <mikulik@physics.muni.cz>, June-10-2002 */

/* image support by Ethan A Merritt <merritt@u.washington.edu>, March 2003 */

/* Text rotation 24-Jul-2002 Ethan A Merritt <merritt@u.washington.edu> */

/* Revised fill patterns 02-Apr-2003 Ethan A Merritt */

/* Enhanced text mode support November 2003 Ethan A Merritt */

#include "driver.h"

#ifdef TERM_REGISTER

register_term(pdf)

#endif

#ifdef TERM_PROTO

TERM_PUBLIC void PDF_options __PROTO ((void));

TERM_PUBLIC void PDF_init __PROTO ((void));

TERM_PUBLIC void PDF_graphics __PROTO ((void));

TERM_PUBLIC void PDF_text __PROTO ((void));

TERM_PUBLIC void PDF_linetype __PROTO ((int linetype));

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

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

TERM_PUBLIC void PDF_put_text __PROTO ((unsigned int x, unsigned int y, const char *str));

TERM_PUBLIC void PDF_reset __PROTO ((void));

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

TERM_PUBLIC int PDF_text_angle __PROTO ((int ang));

TERM_PUBLIC void PDF_point __PROTO ((unsigned int x, unsigned int y, int pointstyle));

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

TERM_PUBLIC void PDF_boxfill __PROTO((int style, unsigned int x1, unsigned int y1, unsigned int width, unsigned int height));

TERM_PUBLIC void PDF_linewidth __PROTO ((double linewidth));

TERM_PUBLIC int PDF_make_palette __PROTO((t_sm_palette *));

TERM_PUBLIC void PDF_previous_palette __PROTO((void));

TERM_PUBLIC void PDF_set_color __PROTO((t_colorspec *));

TERM_PUBLIC void PDF_image __PROTO((unsigned int, unsigned int, coordval *, gpiPoint *, t_imagecolor));

TERM_PUBLIC void PDF_filled_polygon __PROTO((int, gpiPoint *));

/* To support "set term png enhanced" */

TERM_PUBLIC void ENHPDF_put_text __PROTO((unsigned int x, unsigned int y, const char *str));

TERM_PUBLIC void ENHPDF_OPEN __PROTO((char * fontname, double fontsize,

double base, TBOOLEAN widthflag, TBOOLEAN showflag,

int overprint));

TERM_PUBLIC void ENHPDF_FLUSH __PROTO((void));

#define PDF_NUM_POINTTYPES 75 /* number of point symbol types not counting the dot */

#define PDF_RESOLUTION (20) /* number of terminal pixels per pt */

#define PDF_XMAX (5*72*PDF_RESOLUTION) /* 5 inches, 72 pt/inch */

#define PDF_YMAX (3*72*PDF_RESOLUTION) /* 3 inches, 72 pt/inch */

static TBOOLEAN pdf_explicit_size = FALSE;

static size_units pdf_explicit_units = INCHES;

#endif /* TERM_PROTO */

#ifndef TERM_PROTO_ONLY

#ifdef TERM_BODY

#include <pdflib.h>

static PDF *myPDF = NULL;

static unsigned int PDF_xLast = UINT_MAX; /* current pen horizontal position*/

static unsigned int PDF_yLast = UINT_MAX; /* current pen vertical position*/

static int PDF_LineType = LT_UNDEFINED; /* current line type*/

static int PDF_LineCap = 0; /* Butt ends */

static double PDF_LineWidth = 1.0; /* current line width*/

static int PDF_TextAngle = 0; /* current text orientation*/

static enum JUSTIFY PDF_TextJust = LEFT; /* current text justification*/

static double PDF_linewidth_factor = 1.0; /* multiplier for line width */

static double PDF_dashlength_factor = 1.0; /* multiplier for dash length */

static TBOOLEAN PDF_dashedlines = FALSE; /* solid or dashed? */

static TBOOLEAN PDF_monochrome = FALSE; /* default all linetypes to black */

static rgb_color PDF_current_rgb = {0.,0.,0.}; /* Last color set */

static double PDF_current_gray = 0.0; /* Last color set (mono version) */

/* default text font family: */

static char PDF_fontNameDef[MAX_ID_LEN + 1] = "Helvetica";

static double PDF_fontSizeDef = 6; /* default text size*/

/* current text font family: */

static char PDF_fontNameCur[MAX_ID_LEN + 1] = "Helvetica";

static double PDF_fontSizeCur = 6; /* current text size*/

static TBOOLEAN PDF_pageIsOpen = FALSE; /* already started a page ?? */

static TBOOLEAN PDF_pathIsOpen = FALSE; /* open path flag*/

static int PDF_fontAscent = 0; /* estimated current font ascent*/

static int PDF_fontDescent = 0; /* estimated current font descent*/

static int PDF_fontLeading = 0; /* estimated current font leading*/

static int PDF_fontAvWidth = 0; /* estimated current font char average width*/

static int PDF_currentFontHandle; /* Needed for exhanced text mode */

static short PDF_Pen_RealID __PROTO ((int));

static void PDF_PathOpen __PROTO ((void));

static void PDF_PathClose __PROTO ((void));

static void PDF_SetFont __PROTO ((void));

static void PDF_DefinePatterns __PROTO((void));

enum { PDF_patterns = 7 };

static int PDF_patternHandles[PDF_patterns];

#ifndef HAVE_NODASH_LIBPDF

/* Description of dash patterns (same as those in post.trm) */

static int dash1[] = {8, 8};

static int dash2[] = {4, 6};

static int dash3[] = {2, 3};

static int dash4[] = {12, 4, 2, 4};

static int dash5[] = {6, 6, 2, 6};

static int dash6[] = {4, 4, 4, 12};

static int dash7[] = {1, 4, 12, 4, 1, 4};

#endif

/*------------------------ helper functions -------------------*/

static short

PDF_Pen_RealID (int inPenCode)

{

if (inPenCode >= 12)

inPenCode %= 12; /* normalize pen code*/

if (inPenCode <= LT_NODRAW)

inPenCode = LT_NODRAW;

return (inPenCode + 2);

}

/* Functions to ensure that as many move() and vector() calls as

* possible get converted into a single long 'path', before closing it

* with a stroke or similar command. */

static void

PDF_PathOpen ()

{

PDF_pathIsOpen = TRUE;

}

static void

PDF_PathClose ()

{

if (PDF_pathIsOpen) {

PDF_stroke(myPDF);

PDF_pathIsOpen = FALSE;

}

/* Helper function to deal with switching over to a newly selected font.

* For now, this does not try to embed fonts into the PDF file.

* We would like to allow UTF-8 fonts via

font_handle = PDF_findfont(myPDF, PDF_fontNameCur, "unicode", 0);

* but this is not supported by the free-as-in-beer PDFlib Lite.

static void

PDF_SetFont ()

{

int font_handle;

const char *pdfenc = "host";

/* Allow graceful failure */

PDF_set_parameter(myPDF, "fontwarning", "false");

/* LCB : Symbol and ZapfDingbats should use "builtin" encoding */

if ( (strcmp(PDF_fontNameCur,"Symbol") == 0) ||

(strcmp(PDF_fontNameCur,"ZapfDingbats") == 0) ) {

pdfenc = "builtin";

} else if (encoding == S_ENC_ISO8859_1) {

pdfenc = "iso8859-1";

} else if (encoding == S_ENC_ISO8859_2) {

pdfenc = "iso8859-2";

} else if (encoding == S_ENC_ISO8859_9) {

pdfenc = "iso8859-9";

} else if (encoding == S_ENC_ISO8859_15) {

pdfenc = "iso8859-15";

} else if (encoding == S_ENC_CP1250) {

pdfenc = "cp1250";

}

font_handle = PDF_findfont(myPDF, PDF_fontNameCur, pdfenc, 0);

if (font_handle == -1 && strcmp(pdfenc, "host")) {

fprintf(stderr,"Couldn't find font %s in encoding %s, trying \"host\"\n",

PDF_fontNameCur, pdfenc);

font_handle = PDF_findfont(myPDF, PDF_fontNameCur, "host", 0);

}

if (font_handle == -1) {

font_handle = PDF_findfont(myPDF, "Times-Roman", "host", 0);

fprintf(stderr,"Couldn't find font %s, falling back to Times-Roman\n", PDF_fontNameCur);

}

PDF_setfont(myPDF, font_handle, PDF_fontSizeCur * PDF_RESOLUTION);

/* Ask PDFlib for the actual numbers */

PDF_fontAscent = (int) (PDF_RESOLUTION * PDF_fontSizeCur * PDF_get_value(myPDF, "ascender", 0));

PDF_fontDescent = (int) (- PDF_RESOLUTION * PDF_fontSizeCur * PDF_get_value(myPDF, "descender", 0));

PDF_fontLeading = (int) (PDF_RESOLUTION * PDF_fontSizeCur * 0.25);

/* Assume this particular string is a somewhat reasonable typical

* output, for getting at the average character width */

PDF_fontAvWidth = (int)

(PDF_RESOLUTION * PDF_stringwidth(myPDF, "01234567890123456789",

font_handle, PDF_fontSizeCur)

/ 20.0);

PDF_currentFontHandle = font_handle;

}

#if !HAVE_OLD_LIBPDF

static void

PDF_DefinePatterns()

{

int i;

/* EAM April 2003 - Rearrange patterns to maximize contrast in mono.

* Because of the finite linewidth, each pattern must include line

* fragments at the "empty" corners.

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

PDF_patternHandles[i] = PDF_begin_pattern(myPDF, 8, 8, 8, 8, 2);

PDF_setlinewidth(myPDF, 0.25);

PDF_setlinecap(myPDF, 2); /* square ends */

switch (i) {

case 0: PDF_moveto(myPDF, 0, 8);

PDF_lineto(myPDF, 8, 0);

PDF_moveto(myPDF, 0, 0);

PDF_lineto(myPDF, 8, 8);

PDF_stroke(myPDF);

break;

case 1: PDF_moveto(myPDF, 0, 8);

PDF_lineto(myPDF, 8, 0);

PDF_moveto(myPDF, 0, 0);

PDF_lineto(myPDF, 8, 8);

PDF_moveto(myPDF, 4, 0);

PDF_lineto(myPDF, 8, 4);

PDF_lineto(myPDF, 4, 8);

PDF_lineto(myPDF, 0, 4);

PDF_lineto(myPDF, 4, 0);

PDF_stroke(myPDF);

break;

case 2: PDF_moveto(myPDF, 0, 0);

PDF_lineto(myPDF, 0, 8);

PDF_lineto(myPDF, 8, 8);

PDF_lineto(myPDF, 8, 0);

PDF_lineto(myPDF, 0, 0);

PDF_fill(myPDF);

break;

case 3: PDF_moveto(myPDF, 0, 4);

PDF_lineto(myPDF, 4, 0);

PDF_moveto(myPDF, 4, 8);

PDF_lineto(myPDF, 8, 4);

PDF_stroke(myPDF);

break;

case 4: PDF_moveto(myPDF, 0, 4);

PDF_lineto(myPDF, 4, 8);

PDF_moveto(myPDF, 4, 0);

PDF_lineto(myPDF, 8, 4);

PDF_stroke(myPDF);

break;

case 5: PDF_moveto(myPDF, 0, 4);

PDF_lineto(myPDF, 2, 0);

PDF_moveto(myPDF, 2, 8);

PDF_lineto(myPDF, 6, 0);

PDF_moveto(myPDF, 6, 8);

PDF_lineto(myPDF, 8, 4);

PDF_stroke(myPDF);

break;

case 6: PDF_moveto(myPDF, 0, 4);

PDF_lineto(myPDF, 2, 8);

PDF_moveto(myPDF, 2, 0);

PDF_lineto(myPDF, 6, 8);

PDF_moveto(myPDF, 6, 0);

PDF_lineto(myPDF, 8, 4);

PDF_stroke(myPDF);

break;

case 7: /* not used */

PDF_moveto(myPDF, 4, 0);

PDF_lineto(myPDF, 0, 2);

PDF_moveto(myPDF, 8, 2);

PDF_lineto(myPDF, 0, 6);

PDF_moveto(myPDF, 8, 6);

PDF_lineto(myPDF, 4, 8);

PDF_stroke(myPDF);

break;

case 8: /* not used */

PDF_moveto(myPDF, 4, 0);

PDF_lineto(myPDF, 8, 2);

PDF_moveto(myPDF, 0, 2);

PDF_lineto(myPDF, 8, 6);

PDF_moveto(myPDF, 0, 6);

PDF_lineto(myPDF, 4, 8);

PDF_stroke(myPDF);

break;

}

PDF_end_pattern(myPDF);

}

#endif

/*------------------- the terminal entry functions --------------------*/

TERM_PUBLIC void

PDF_options ()

{

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

/* we have already initialized the terminal. */

if (c_token != 2)

pdf_explicit_size = FALSE;

while (!END_OF_COMMAND) {

if (almost_equals(c_token, "enh$anced")) {

c_token++;

term->put_text = ENHPDF_put_text;

term->flags |= TERM_ENHANCED_TEXT;

continue;

} else if (almost_equals(c_token, "noenh$anced")) {

c_token++;

term->put_text = PDF_put_text;

term->flags &= ~TERM_ENHANCED_TEXT;

continue;

}

if (almost_equals(c_token, "fn$ame") || almost_equals(c_token, "font")) {

char *s, *comma;

c_token++;

if (!(s = try_to_get_string()))

int_error(c_token,"fname: expecting font name");

comma = strrchr(s,',');

if (comma && (1 == sscanf(comma+1,"%lf",&PDF_fontSizeDef)))

*comma = '\0';

if (*s)

strncpy(PDF_fontNameDef, s, sizeof(PDF_fontNameDef));

free(s);

continue;

}

if (almost_equals(c_token, "fs$ize")) {

c_token++;

if (END_OF_COMMAND)

int_error(c_token,"fsize: expecting font size");

PDF_fontSizeDef = real_expression();

continue;

}

if (equals(c_token, "lw") || almost_equals(c_token, "linew$idth")) {

c_token++;

if (END_OF_COMMAND)

int_error(c_token, "expecting line width");

PDF_linewidth_factor = real_expression();

if (PDF_linewidth_factor <= 0)

PDF_linewidth_factor = 0.1;

continue;

}

if (almost_equals(c_token, "rou$nded")) {

c_token++;

PDF_LineCap = 1;

continue;

}

if (equals(c_token, "butt")) {

PDF_LineCap = 0;

continue;

}

if (equals(c_token, "color") || almost_equals(c_token, "col$our")) {

c_token++;

PDF_monochrome = FALSE;

continue;

}

if (almost_equals(c_token, "mono$chrome")) {

c_token++;

PDF_monochrome = TRUE;

continue;

}

if (equals(c_token, "dl") || almost_equals(c_token, "dashl$ength")) {

c_token++;

if (END_OF_COMMAND)

int_error(c_token, "expecting dashlength multiplier");

PDF_dashlength_factor = real_expression();

if (PDF_dashlength_factor < 0.0)

PDF_dashlength_factor = 1.0;

continue;

}

if (equals(c_token, "solid")) {

c_token++;

PDF_dashedlines = FALSE;

continue;

}

if (equals(c_token, "size")) {

float xmax_t, ymax_t;

c_token++;

pdf_explicit_size = TRUE;

pdf_explicit_units = parse_term_size(&xmax_t, &ymax_t, INCHES);

term->xmax = xmax_t*PDF_RESOLUTION*72./gp_resolution;

term->ymax = ymax_t*PDF_RESOLUTION*72./gp_resolution;

break;

}

#ifdef HAVE_NODASH_LIBPDF

int_warn(NO_CARET,"gnuplot was linked against a version of pdflib with no dash or pattern support");

#else

if (almost_equals(c_token, "dash$ed")) {

c_token++;

PDF_dashedlines = TRUE;

continue;

}

#endif

int_error(c_token, "unexpected text at end of command");

}

/* Save options back into options string in normalized format */

sprintf(term_options, "%s%s fname '%s' fsize %g linewidth %3.1f %s ",

PDF_monochrome ? "monochrome " : " ",

term->put_text == ENHPDF_put_text ? "enhanced" : "noenhanced",

PDF_fontNameDef, PDF_fontSizeDef, PDF_linewidth_factor,

PDF_LineCap == 1 ? "rounded" : "");

if (PDF_dashedlines)

sprintf(&(term_options[strlen(term_options)]), "dashed dl %3.1f",

PDF_dashlength_factor);

if (pdf_explicit_size) {

if (pdf_explicit_units == CM)

sprintf(&(term_options[strlen(term_options)]), "size %.2fcm, %.2fcm ",

2.54*(float)term->xmax/(72.*PDF_RESOLUTION),

2.54*(float)term->ymax/(72.*PDF_RESOLUTION));

else

sprintf(&(term_options[strlen(term_options)]), "size %.2fin, %.2fin ",

(float)term->xmax/(72.*PDF_RESOLUTION),

(float)term->ymax/(72.*PDF_RESOLUTION));

}

TERM_PUBLIC void

PDF_init ()

{

static TBOOLEAN PDFlib_booted = FALSE;

char *gpversionstring;

char *username;

char *timedate;

time_t now;

if (!PDFlib_booted) {

PDF_boot();

PDFlib_booted = TRUE;

}

if (!myPDF)

myPDF = PDF_new();

/*open new PDF file */

#ifdef HAVE_LIBPDF_OPEN_FILE

if (PDF_open_file(myPDF, outstr) == -1)

#else

if (PDF_begin_document(myPDF, outstr?outstr:"-", 0,

"compatibility=1.4") == -1)

#endif /* HAVE_LIBPDF_OPEN_FILE */

int_error(NO_CARET, "Error:cannot open PDF file .\n");

#ifdef PDF_DONT_COMPRESS

/* for easier debugging of the output, turn off PDF stream

* compression */

PDF_set_value(myPDF, "compress", 0);

#endif

gpversionstring = gp_alloc(20 + strlen(gnuplot_version) +

strlen(gnuplot_patchlevel) + 1, "PDF_init");

sprintf(gpversionstring,"gnuplot %s patchlevel %s",

gnuplot_version, gnuplot_patchlevel);

time(&now);

timedate=asctime(localtime(&now));

timedate[strlen(timedate)-1]='\0';

PDF_set_info(myPDF,"Creator",gpversionstring);

username=getusername();

if (username) {

PDF_set_info(myPDF,"Author",username);

free(username);

}

if (outstr)

PDF_set_info(myPDF,"Title",outstr); /* FIXME: use 'set title', if any? */

PDF_set_info(myPDF,"Subject","gnuplot plot");

if (gpversionstring)

free(gpversionstring);

PDF_LineType = LT_UNDEFINED;

/* set current font to default */

strcpy(PDF_fontNameCur, PDF_fontNameDef);

PDF_fontSizeCur = PDF_fontSizeDef;

#if !HAVE_OLD_LIBPDF

PDF_DefinePatterns();

#endif

/* Have to start the first page now, in order to know the actual

* size of the selected font */

PDF_graphics();

/* set h_char, v_char*/

term->h_char = PDF_fontAvWidth;

term->v_char = (PDF_fontAscent + PDF_fontDescent + PDF_fontLeading);

/* set h_tic, v_tic*/

term->h_tic = term->v_tic = 3 * PDF_RESOLUTION;

/* initialize terminal's pointsize from "set pointsize" value */

term_pointsize = pointsize;

/* Initialize other default settings */

PDF_setlinecap(myPDF, PDF_LineCap);

PDF_setlinejoin(myPDF, PDF_LineCap); /* round+round or butt+mitre */

}

TERM_PUBLIC void

PDF_graphics ()

{

if (PDF_pageIsOpen)

return; /* already open --> nothing to do */

PDF_pathIsOpen = FALSE;

PDF_xLast = PDF_yLast = UINT_MAX;

/* set size of canvas */

if (!pdf_explicit_size) {

term->xmax = PDF_XMAX;

term->ymax = PDF_YMAX;

}

PDF_begin_page(myPDF, (double)term->xmax / PDF_RESOLUTION,

(double)term->ymax / PDF_RESOLUTION);

PDF_scale(myPDF, 1.0/PDF_RESOLUTION, 1.0/PDF_RESOLUTION);

if (title.text && title.text[0])

/* a title has been set --> use it as the bookmark name, too */

PDF_add_bookmark(myPDF, title.text, 0, 1);

PDF_pageIsOpen = TRUE;

PDF_SetFont();

}

TERM_PUBLIC void

PDF_text ()

{

PDF_PathClose();

PDF_end_page(myPDF);

PDF_pageIsOpen = FALSE;

}

TERM_PUBLIC void

PDF_reset ()

{

assert(PDF_pageIsOpen == FALSE);

#ifdef HAVE_LIBPDF_OPEN_FILE

PDF_close(myPDF);

#else

PDF_end_document(myPDF, "");

#endif /* HAVE_LIBPDF_OPEN_FILE */

PDF_delete(myPDF);

myPDF = NULL;

}

TERM_PUBLIC void

PDF_linetype (int linetype)

{

int dash = linetype % 8;

linetype = PDF_Pen_RealID(linetype);

if (linetype == PDF_LineType)

return;

PDF_PathClose ();

PDF_LineType = linetype;

if (PDF_monochrome) {

PDF_current_gray = 0.0;

PDF_setgray(myPDF, PDF_current_gray);

} else {

unsigned int irgb = pm3d_color_names_tbl[1+linetype].value;

PDF_current_rgb.r = (double)((irgb >> 16) & 0xff) / 255.;

PDF_current_rgb.g = (double)((irgb >> 8) & 0xff) / 255.;

PDF_current_rgb.b = (double)((irgb ) & 0xff) / 255.;

PDF_setrgbcolor(myPDF, PDF_current_rgb.r, PDF_current_rgb.g, PDF_current_rgb.b);

}

#ifndef HAVE_NODASH_LIBPDF

if (PDF_dashedlines) {

char dashtype[64];

float dl = 8.0 * PDF_dashlength_factor;

switch (dash) {

default:

case 0: PDF_setdash(myPDF, 0.0, 0.0);

return;

case 1: sprintf(dashtype,"dasharray={%4.1f %4.1f}",

dl*dash1[0],dl*dash1[1]);

break;

case 2: sprintf(dashtype,"dasharray={%4.1f %4.1f}",

dl*dash2[0],dl*dash2[1]);

break;

case 3: sprintf(dashtype,"dasharray={%4.1f %4.1f}",

dl*dash3[0],dl*dash3[1]);

break;

case 4: sprintf(dashtype,"dasharray={%4.1f %4.1f %4.1f %4.1f}",

dl*dash4[0],dl*dash4[1],dl*dash4[2],dl*dash4[3]);

break;

case 5: sprintf(dashtype,"dasharray={%4.1f %4.1f %4.1f %4.1f}",

dl*dash5[0],dl*dash5[1],dl*dash5[2],dl*dash5[3]);

break;

case 6: sprintf(dashtype,"dasharray={%4.1f %4.1f %4.1f %4.1f}",

dl*dash6[0],dl*dash6[1],dl*dash6[2],dl*dash6[3]);

break;

case 7: sprintf(dashtype,"dasharray={%4.1f %4.1f %4.1f %4.1f %4.1f %4.1f}",

dl*dash7[0],dl*dash7[1],dl*dash7[2],dl*dash7[3],dl*dash7[4],dl*dash7[5]);

break;

}

PDF_setdashpattern(myPDF,dashtype);

}

#endif

}

TERM_PUBLIC void

PDF_linewidth (double linewidth)

{

PDF_PathClose();

PDF_LineWidth = PDF_RESOLUTION * PDF_linewidth_factor * linewidth / 4.0;

if (PDF_LineWidth < 0.1)

PDF_LineWidth = 0.1;

PDF_setlinewidth(myPDF, PDF_LineWidth);

}

TERM_PUBLIC void

PDF_move (unsigned int x, unsigned int y)

{

if (PDF_pathIsOpen && x == PDF_xLast && y == PDF_yLast)

return;

PDF_PathOpen ();

PDF_moveto(myPDF, x, y);

PDF_xLast = x;

PDF_yLast = y;

}

TERM_PUBLIC void

PDF_vector (unsigned int x, unsigned int y)

{

if (PDF_pathIsOpen && x == PDF_xLast && y == PDF_yLast)

return;

PDF_PathOpen ();

PDF_lineto(myPDF, x, y);

PDF_xLast = x;

PDF_yLast = y;

}

/* Helper function. Many symbols have an additional dot in their

* center, so isolate its drawing into a separate function. */

static GP_INLINE void

PDF_dot (unsigned int x, unsigned int y)

{

/* Imitate PS's way of creating a small dot by a zero-length line

* segment with rounded endpoints */

PDF_setlinecap(myPDF, 1); /* rounded ends */

PDF_moveto(myPDF, x, y);

PDF_lineto(myPDF, x, y);

PDF_stroke(myPDF);

PDF_setlinecap(myPDF, PDF_LineCap); /* restore ends */

}

TERM_PUBLIC void

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

{

PDF_PathClose ();

PDF_save(myPDF);

if (number < 0) {

/* Treat all negative point sizes as dots */

PDF_dot(x, y);

} else {

/* Change coordinate system so the point symbols themselves

* can be drawn without depending on position or size (-->

* better compression and less coding for gnuplot) */

/* NB: I use the do_pointsize() default implementation, which

* just stores the last set pointsize into `term_pointsize',

* to avoid introducing another static driver-local variable

* */

PDF_translate(myPDF, x, y);

PDF_scale(myPDF, term->h_tic / 2.0 * term_pointsize,

term->v_tic / 2.0 * term_pointsize);

/* Correct linewidth to counter the scaling effect --- assume

* h_tic is usable, to avoid having to average h_ and v_tic */

PDF_setlinewidth(myPDF,

PDF_LineWidth / (term->h_tic / 2.0 * term_pointsize));

switch (number %= PDF_NUM_POINTTYPES) {

case 0: /* Plus */

PDF_moveto(myPDF, -1, 0);

PDF_lineto(myPDF, 1, 0);

PDF_moveto(myPDF, 0, -1);

PDF_lineto(myPDF, 0, 1);

PDF_stroke(myPDF);

break;

case 2: /* Star */

PDF_moveto(myPDF, -1, 0);

PDF_lineto(myPDF, 1, 0);

PDF_moveto(myPDF, 0, -1);

PDF_lineto(myPDF, 0, 1);

/* FALLTHROUGH */

case 1: /* Cross */

PDF_moveto(myPDF, -1, -1);

PDF_lineto(myPDF, 1, 1);

PDF_moveto(myPDF, 1, -1);

PDF_lineto(myPDF, -1, 1);

PDF_stroke(myPDF);

break;

/* For each x = 0..5, 4 shapes are defined:

* 3 + 2*x --> hollow symbol with a dot at its center

* 4 + 2*x --> solid symbol filled in linetype's color

* 63 + x --> hollow symbol without the center dot

* 69 + x --> symbol filled with white --> opaque symbol */

case 63+0: /* BoxEmpty */

case 3+2*0: /* Box */

PDF_moveto(myPDF, -1, -1);

PDF_lineto(myPDF, 1, -1);

PDF_lineto(myPDF, 1, 1);

PDF_lineto(myPDF, -1, 1);

PDF_closepath_stroke(myPDF);

if (number == 3) PDF_dot(0,0);

break;

case 69+0: /* BoxWhitefilled */

PDF_setgray_fill(myPDF, 1);

/* FALLTHROUGH */

case 4+2*0: /* BoxFilled */

PDF_moveto(myPDF, -1, -1);

PDF_lineto(myPDF, 1, -1);

PDF_lineto(myPDF, 1, 1);

PDF_lineto(myPDF, -1, 1);

PDF_closepath_fill_stroke(myPDF);

break;

case 63+1: /* CircleEmpty */

case 3+2*1: /* Circle */

PDF_circle(myPDF, 0, 0, 1);

PDF_stroke(myPDF);

if (number == 5) PDF_dot(0,0);

break;

case 69+1: /* CircleWhitefilled */

PDF_setgray_fill(myPDF, 1);

/* FALLTHROUGH */

case 4+2*1: /* CircleFilled */

PDF_circle(myPDF, 0, 0, 1);

PDF_fill_stroke(myPDF);

break;

case 63+2: /* TriangleUpEmpty */

case 3+2*2: /* TriangleUp */

PDF_moveto(myPDF, 0, 1.12);

PDF_lineto(myPDF, -1, -0.5);

PDF_lineto(myPDF, 1, -0.5);

PDF_closepath_stroke(myPDF);

if (number == 7) PDF_dot(0,0);

break;

case 69+2: /* TriangleUpWhitefilled */

PDF_setgray_fill(myPDF, 1);

/* FALLTHROUGH */

case 4+2*2: /* TriangleUpFilled */

PDF_moveto(myPDF, 0, 1.12);

PDF_lineto(myPDF, -1, -0.5);

PDF_lineto(myPDF, 1, -0.5);

PDF_closepath_fill_stroke(myPDF);

break;

case 63+3: /* TriangleDownEmpty */

case 3+2*3: /* TriangleDown */

PDF_moveto(myPDF, 0, -1.12);

PDF_lineto(myPDF, -1, 0.5);

PDF_lineto(myPDF, 1, 0.5);

PDF_closepath_stroke(myPDF);

if (number == 9) PDF_dot(0,0);

break;

case 69+3: /* TriangleDownWhitefilled */

PDF_setgray_fill(myPDF, 1);

/* FALLTHROUGH */

case 4+2*3: /* TriangleDownFilled */

PDF_moveto(myPDF, 0, -1.12);

PDF_lineto(myPDF, -1, 0.5);

PDF_lineto(myPDF, 1, 0.5);

PDF_closepath_fill_stroke(myPDF);

break;

case 63+4: /* DiamondEmpty */

case 3+2*4: /* Diamond */

PDF_moveto(myPDF, 0, -1);

PDF_lineto(myPDF, 1, 0);

PDF_lineto(myPDF, 0, 1);

PDF_lineto(myPDF, -1, 0);

PDF_closepath_stroke(myPDF);

if (number == 11) PDF_dot(0,0);

break;

case 69+4: /* DiamondWhitefilled */

PDF_setgray_fill(myPDF, 1);

/* FALLTHROUGH */

case 4+2*4: /* DiamondFilled */

PDF_moveto(myPDF, 0, -1);

PDF_lineto(myPDF, 1, 0);

PDF_lineto(myPDF, 0, 1);

PDF_lineto(myPDF, -1, 0);

PDF_closepath_fill_stroke(myPDF);

break;

case 63+5: /* PentagonEmpty */

case 3+2*5: /* Pentagon */

PDF_moveto(myPDF, 0, 1);

PDF_lineto(myPDF, -0.95, 0.31);

PDF_lineto(myPDF, -0.58, -0.81);

PDF_lineto(myPDF, +0.58, -0.81);

PDF_lineto(myPDF, +0.95, 0.31);

PDF_closepath_stroke(myPDF);

if (number == 13) PDF_dot(0,0);

break;

case 69+5: /* PentagonWhitefilled */

PDF_setgray_fill(myPDF, 1);

/* FALLTHROUGH */

case 4+2*5: /* PentagonFilled */

PDF_moveto(myPDF, 0, 1);

PDF_lineto(myPDF, -0.95, 0.31);

PDF_lineto(myPDF, -0.58, -0.81);

PDF_lineto(myPDF, +0.58, -0.81);

PDF_lineto(myPDF, +0.95, 0.31);

PDF_closepath_fill_stroke(myPDF);

break;

/* 15 + (0..15): circles with varying parts of'em filled. The added

* number is a bit-pattern of the 4 quadrants: 1 signals a quadrant

* filled */

case 15+0:

PDF_moveto(myPDF, 0, 0);

PDF_lineto(myPDF, 0, 1);

PDF_arc(myPDF, 0, 0, 1, 90, 360+90);

PDF_closepath_stroke(myPDF);

break;

/* Generalize common code into a macro... */

#define CIRCLE_SINGLE_PIESLICE(x, y, angle1, angle2) \

PDF_moveto(myPDF, 0, 0); \

PDF_lineto(myPDF, (x), (y)); \

PDF_arc(myPDF, 0, 0, 1, (angle1), (angle2)); \

PDF_lineto(myPDF, 0, 0); \

PDF_closepath(myPDF); \

PDF_fill_stroke(myPDF); \

PDF_arc(myPDF, 0, 0, 1, (angle2), (angle1) + 360); \

PDF_stroke(myPDF); \

break;

#define CIRCLE_SINGLE_QUADRANT(x, y, angle) \

CIRCLE_SINGLE_PIESLICE(x, y, angle, angle+90);

case 15+1:

CIRCLE_SINGLE_QUADRANT(1, 0, 0);

case 15+2:

CIRCLE_SINGLE_QUADRANT(0, 1, 90);

case 15+4:

CIRCLE_SINGLE_QUADRANT(-1, 0, 180);

case 15+8:

CIRCLE_SINGLE_QUADRANT(0, -1, 270);

#undef CIRCLE_SINGLE_QUADRANT

#define CIRCLE_TWO_NEIGHBOR_QUADRANTS(x, y, angle) \

CIRCLE_SINGLE_PIESLICE(x, y, angle, angle+180)

case 15+3:

CIRCLE_TWO_NEIGHBOR_QUADRANTS(1, 0, 0);

case 15+6:

CIRCLE_TWO_NEIGHBOR_QUADRANTS(0, 1, 90);

case 15+12:

CIRCLE_TWO_NEIGHBOR_QUADRANTS(-1, 0, 180);

case 15+9:

CIRCLE_TWO_NEIGHBOR_QUADRANTS(0, -1, 270);

#undef CIRCLE_TWO_NEIGHBOR_QUADRANTS

#define CIRCLE_TWO_OPPOSING_QUADRANTS(x, y, angle) \

PDF_moveto(myPDF, 0, 0); \

PDF_lineto(myPDF, x, y); \

PDF_arc(myPDF, 0, 0, 1, angle, angle + 90); \

PDF_lineto(myPDF, 0, 0); \

PDF_fill_stroke(myPDF); \

PDF_moveto(myPDF, 0, 0); \

PDF_lineto(myPDF, -x, -y); \

PDF_arc(myPDF, 0, 0, 1, angle + 180, angle + 270); \

PDF_lineto(myPDF, 0, 0); \

PDF_fill_stroke(myPDF); \

PDF_arc(myPDF, 0, 0, 1, angle + 90, angle + 360); \

PDF_stroke(myPDF); \

break;

case 15+5:

CIRCLE_TWO_OPPOSING_QUADRANTS(1, 0, 0);

case 15+10:

CIRCLE_TWO_OPPOSING_QUADRANTS(0, 1, 90);

#undef CIRCLE_TWO_OPPOSING_QUADRANTS

#define CIRCLE_THREE_QUADRANTS(x, y, angle) \

CIRCLE_SINGLE_PIESLICE(x, y, angle, angle+270)

case 15+7:

CIRCLE_THREE_QUADRANTS(1, 0, 0);

case 15+14:

CIRCLE_THREE_QUADRANTS(0, 1, 90);

case 15+13:

CIRCLE_THREE_QUADRANTS(-1, 0, 180);

case 15+11:

CIRCLE_THREE_QUADRANTS(0, -1, 270);

#undef CIRCLE_THREE_QUADRANTS

#undef CIRCLE_SINGLE_PIESLICE

case 15+15:

PDF_circle(myPDF, 0, 0, 1);

PDF_closepath_fill_stroke(myPDF);

break;

/*************************************************************************/

/* 31 + (0..15): squares with different quadrants of them filled in. */

/*************************************************************************/

/* 47 + (0..15): diamonds with filled quadrants as given by bit pattern */

/* Diamonds are drawn as squares rotated by 45 degrees, so can use

* fall-through from diamond to squares, and re-use some macros. */

/*************************************************************************/

case 47+0:

PDF_rotate(myPDF, 45);

/* FALLTHROUGH */

case 31+0:

PDF_moveto(myPDF, 0, 0);

PDF_lineto(myPDF, 0, 1);

PDF_lineto(myPDF, -1, 1);

PDF_lineto(myPDF, -1, -1);

PDF_lineto(myPDF, 1, -1);

PDF_lineto(myPDF, 1, 1);

PDF_lineto(myPDF, 0, 1);

PDF_stroke(myPDF);

break;

case 47+15:

PDF_rotate(myPDF, 45);

/* FALLTHROUGH */

case 31+15:

PDF_moveto(myPDF, -1, 1);

PDF_lineto(myPDF, -1, -1);

PDF_lineto(myPDF, 1, -1);

PDF_lineto(myPDF, 1, 1);

PDF_closepath_fill_stroke(myPDF);

break;

/* macros defining shapes of the partly filled symbols. Done by

View remainder of file in raw view

gnuplot-old/term/pdf.trm at gnuplot-4-4-alpha · gnuplot/gnuplot-old · GitHub

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