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

/* GNUPLOT -- gd.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 PNG and JPEG output using

* GD library version 2

* To Use:

* set terminal png ?options ...?

* Where an option is:

* transparent - generate transparent PNGs. The first color will

* be the transparent one.

* interlace - generate interlaced PNGs.

* image size (in pixels)

* font size (tiny,small,medium,large,giant)

* font name (TrueType or Adobe Type 1 font name is passed to libgd)

* EAM Dec 2010: Obsolete!

* xrrggbb - sets the next color. x is the literal character 'x',

* rrggbb are the red green and blue components in hex. For example

* x00ff00 is green. The background color is set first, then the

* color borders, then the X & Y axis, then the plotting colors.

* (The weird color spec is in order to get around limitations

* in gnuplot's scanner.)

* This driver is modeled after the PBM driver pbm.trm.

* AUTHORS

* Sam Shen <sls@mh1.lbl.gov>

* Alex Woo <woo@playfair.stanford.edu>

* Ethan A Merritt <merritt@u.washington.edu>

* CONTRIBUTORS

* Alfred Reibenschuh <alfred.reibenschuh@it-austria.com> or <fredo@blackbox.at>

* Ben Laurie <ben@algroup.co.uk>

* This version outputs either indexed or truecolor (24-bit RGB) images

* The default size is 640x480 pixels.

******************************************************************************

* PLEASE READ *

* This driver uses the gd library, available from http://www.libgd.org *

* This driver allows you to use TrueType, OpenType, or Adobe Type 1 fonts. *

* If you have libgd version 2.0.36 or later, you may also be able to access *

* any fonts that are managed by the fontconfig utility. *

* You can use this driver without having any TrueType fonts installed, *

* but the default fonts are comparatively limited. *

******************************************************************************

* Petr Mikulik, Jan 1999: terminal entries for PM3D functionality

* Ethan Merritt, May 2001: modified gd/gif driver to produce png instead;

* added support for line width and TrueType fonts

* Shige Takeno, Mar 2011: deal with libgd built to use SJIS rather than UTF-8

* Ethan Merritt, Apr 2012: Don't claim to support versions 1.x of libgd

* kmiya@culti, Nov 2016: sixelgd terminal

* Ethan Merritt, Jun 2019:

* Revisit use of brush for thick lines with alpha channel

* + setting alpha in the brush itself works OK up to about lw 4.

* After that the repeated composition of the brush wipes out the transparency.

* Ethan Merritt Jan 2023:

* Newer antialiasing support in gdlib makes it actually work with the native

* implementation for linewidth > 1. But it requires truecolor.

* Conversely, using the brush alternative (via "rounded") has become very slow.

* CHANGE:

* Default to "set term png butt truecolor"

* gif and sixel default to "butt notruecolor"

#define GD_DEFINED_COLORS 96 /* Must not exceed size of pm3d_color_names_tbl[] */

#include "driver.h"

#ifdef TERM_REGISTER

register_term(png)

#endif

#ifdef TERM_PROTO

TERM_PUBLIC void PNG_options(void);

TERM_PUBLIC void PNG_init(void);

TERM_PUBLIC void PNG_graphics(void);

TERM_PUBLIC void PNG_text(void);

TERM_PUBLIC void PNG_linetype(int linetype);

TERM_PUBLIC void PNG_linewidth(double linewidth);

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

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

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

TERM_PUBLIC int PNG_justify_text(enum JUSTIFY mode);

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

TERM_PUBLIC int PNG_text_angle(float ang);

TERM_PUBLIC void PNG_reset(void);

TERM_PUBLIC int PNG_set_font(const char *fontname);

TERM_PUBLIC void PNG_pointsize(double ptsize);

TERM_PUBLIC void PNG_boxfill(int, unsigned int, unsigned int, unsigned int, unsigned int);

TERM_PUBLIC int PNG_make_palette (t_sm_palette *);

/* TERM_PUBLIC void PNG_previous_palette (void); */

TERM_PUBLIC void PNG_set_color (t_colorspec *);

TERM_PUBLIC void PNG_filled_polygon (int, gpiPoint *);

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

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

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

TERM_PUBLIC void ENHGD_OPEN(char * fontname, double fontsize,

double base, TBOOLEAN widthflag, TBOOLEAN showflag,

int overprint);

TERM_PUBLIC void ENHGD_FLUSH(void);

TERM_PUBLIC void ENHGD_boxed_text(unsigned int, unsigned int, int);

#include <gd.h>

/* Include files for bitmap fonts */

#include <gdfontt.h>

#include <gdfonts.h>

#include <gdfontl.h>

#include <gdfontmb.h>

#include <gdfontg.h>

/* some version test macros */

#define GD_NUM_VERSION(major, minor, release) \

(((major) * 10000) + ((minor) * 100) + (release))

#define GD_THIS_VERSION \

GD_NUM_VERSION(GD_MAJOR_VERSION, GD_MINOR_VERSION, GD_RELEASE_VERSION)

#define GD_MIN_VERSION(major, minor, release) \

(GD_THIS_VERSION >= GD_NUM_VERSION(major, minor,release))

/* Before version 2.0.36, the libgd function gdFTUseFontConfig() didn't */

/* do what we need. Test for earlier versions and ignore it. */

#if GD_MIN_VERSION(2,0,36)

# define gdUseFontConfig(x) gdFTUseFontConfig(x)

#endif

#ifndef gdUseFontConfig

# define gdUseFontConfig(x) 0

#endif

/* These intermediate functions are necessary on Windows since

the shared version of libgd uses a different calling convention

and there is no proper macro defined.

#if defined(_WIN32) && !defined(NONDLL)

static void gp_gdImagePolygon(gdImagePtr, gdPointPtr, int, int);

static void gp_gdImageFilledPolygon(gdImagePtr, gdPointPtr, int, int);

#else

# define gp_gdImagePolygon gdImagePolygon

# define gp_gdImageFilledPolygon gdImageFilledPolygon

#endif

static void PNG_PointX(unsigned int, unsigned int);

static void PNG_PointPlus(unsigned int, unsigned int);

static void PNG_Triangle(unsigned int x, unsigned int y, int direction,

void (*draw_func)(gdImagePtr, gdPointPtr, int, int));

static void PNG_Diamond(unsigned int x, unsigned int y,

void (*draw_func)(gdImagePtr, gdPointPtr, int, int));

static void PNG_init_brush(int);

#define GREG_XMAX 640

#define GREG_YMAX 480

/* This will be the default font */

#define gdfont gdFontMediumBold

#define PNG_VCHAR 13

#define PNG_HCHAR 7

#define PNG_TICSIZE (GREG_YMAX/100)

#define PNG_MAX_COLORS 256

#define GOT_NEXT_PROTO

#endif

#ifndef TERM_PROTO_ONLY

#ifdef TERM_BODY

static const char *PNG_initialized = NULL; /* Which terminal was previously used? */

static struct {

gdImagePtr image;

gdFontPtr font;

unsigned int x, y;

int height;

int charh, charw;

int color; /* Magic index returned by libgd */

int rgb; /* Our guess at the corresponding rgb */

int n_colors;

int color_table[PNG_MAX_COLORS];

int rgb_table[PNG_MAX_COLORS];

float angle;

enum JUSTIFY justify;

int flags;

int linetype;

int linewidth;

TBOOLEAN capbutt; /* use capbutt on lines with GD2, 20051205 MWS*/

TBOOLEAN use_builtin;

double ttfsize;

char *ttffont;

gdFontPtr default_font;

char * default_ttffont;

double default_ttfsize;

double fontscale;

TBOOLEAN TrueColor;

double dashfraction; /* Where in a dot-dash pattern we left off */

/* Variables for animated gif support: */

TBOOLEAN animate; /* Only gif supports animation */

TBOOLEAN anchor; /* sixel and kitty treat it as synonym for "anchor" */

int loop_count; /* Number of times to repeat sequence */

int frame_count; /* Number of frames in animation */

int frame_delay; /* Time between frames in .01 seconds */

TBOOLEAN frame_optimization;

gdImagePtr previous_image; /* Needed to encode animation as a series of deltas */

} png_state

= {.anchor = TRUE};

#define PNG_USE_TRANSPARENT 1

#define PNG_USE_INTERLACE 2

#define PNG_USE_CROP 4

enum PNG_id {

PNG_TRANSPARENT, PNG_NOTRANSPARENT,

PNG_INTERLACE, PNG_NOINTERLACE,

PNG_CROP, PNG_NOCROP,

/* Font size */

PNG_TINY, PNG_SMALL, PNG_MEDIUM, PNG_LARGE, PNG_GIANT,

PNG_FONT, PNG_FONTSCALE,

PNG_SIZE, PNG_BACKGROUND,

PNG_ENHANCED, PNG_NOENHANCED,

PNG_TRUECOLOR, PNG_NOTRUECOLOR,

PNG_LINEWIDTH, PNG_BUTT, PNG_ROUNDED, PNG_DASHLENGTH,

GIF_ANIMATE, GIF_DELAY, GIF_LOOP, GIF_NOOPT, GIF_OPT,

PNG_ANCHOR, PNG_SCROLL,

PNG_OTHER

};

#ifdef Y

# undef Y

#endif

#define Y(y) (png_state.height - (y))

static int PNG_XMAX = GREG_XMAX;

static int PNG_YMAX = GREG_YMAX;

static const int PNG_POINT_SCALE = 3;

static int PNG_ps = 3;

unsigned int bounding_box[4];

#define GD_TEXTBOX_MARGIN 1.0

double bounding_xmargin = GD_TEXTBOX_MARGIN;

double bounding_ymargin = GD_TEXTBOX_MARGIN;

static TBOOLEAN ENHgd_show = TRUE;

static TBOOLEAN ENHgd_sizeonly = FALSE;

static struct gen_table PNG_opts[] =

{

{ "trans$parent", PNG_TRANSPARENT },

{ "notran$sparent", PNG_NOTRANSPARENT },

{ "inter$lace", PNG_INTERLACE },

{ "nointer$lace", PNG_NOINTERLACE },

{ "crop", PNG_CROP },

{ "nocrop", PNG_NOCROP },

{ "ti$ny", PNG_TINY },

{ "s$mall", PNG_SMALL },

{ "m$edium", PNG_MEDIUM },

{ "l$arge", PNG_LARGE },

{ "g$iant", PNG_GIANT },

{ "fontscale", PNG_FONTSCALE },

{ "fo$nt", PNG_FONT },

{ "si$ze", PNG_SIZE },

{ "enh$anced", PNG_ENHANCED },

{ "noenh$anced", PNG_NOENHANCED },

{ "true$color", PNG_TRUECOLOR },

{ "notrue$color", PNG_NOTRUECOLOR },

{ "linew$idth", PNG_LINEWIDTH },

{ "anim$ate", GIF_ANIMATE }, /* gif animation options */

{ "anchor", PNG_ANCHOR }, /* sixel/kitty image drawn at top left */

{ "scroll", PNG_SCROLL }, /* sixel/kitty image scrolls with text */

{ "delay", GIF_DELAY },

{ "loop", GIF_LOOP },

{ "noopt$imize", GIF_NOOPT },

{ "opt$imize", GIF_OPT }, /* end of gif animation options */

{ "lw", PNG_LINEWIDTH },

{ "butt", PNG_BUTT},

{ "round$ed", PNG_ROUNDED},

{ "dashl$ength", PNG_DASHLENGTH},

{ "dl", PNG_DASHLENGTH},

{ "backg$round", PNG_BACKGROUND},

{ NULL, PNG_OTHER }

};

#undef MAXLINEWIDTH

#define MAXLINEWIDTH 100

static double PNG_linewidth_factor = 1.0;

static double PNG_dashlength_factor = 1.0;

/* shige takeno:

* libgd can be built to prefer UTF-8 or SJIS encoding for Japanese.

* If it wants SJIS and we are currently in UTF8, convert.

* If it wants UTF8 and we are currently in SJIS, convert.

* conditional compilation flags:

* HAVE_ICONV (iconv library)

* JIS_GDLIB (using gdlib configured with -DJISX0208)

#ifdef HAVE_ICONV

#include <iconv.h>

#endif

static void gd_iconv(char **string);

/* EAM - gdImage structure to hold brushes for linewidth */

/* We will allocate and initialize these on demand */

typedef struct {

gdImagePtr im;

unsigned int last_rgb;

int bgnd;

int fgnd;

} PNG_BRUSH;

static PNG_BRUSH *PNG_brush[MAXLINEWIDTH+1];

typedef struct {

gdImagePtr im;

unsigned int last_rgb;

int fillpar;

} PNG_FILL_TILE;

static PNG_FILL_TILE PNG_fill_tile = { (gdImagePtr)0, 0, 0 };

/* To be used with libgd 2.0.34 to request Symbol encoding */

#ifdef gdFTEX_Adobe_Custom

static gdFTStringExtra PNG_FONT_INFO = {0,0,0,0,0,NULL,NULL};

#endif

#if defined(_WIN32) && !defined(NONDLL)

static void

gp_gdImagePolygon(gdImagePtr im, gdPointPtr p, int n, int c)

{

gdImagePolygon(im, p, n, c);

}

static void

gp_gdImageFilledPolygon(gdImagePtr im, gdPointPtr p, int n, int c)

{

gdImageFilledPolygon(im, p, n, c);

}

#endif

/* Common code to crop the image around its bounding box, just before writing

down the file.

static void

image_do_crop (void)

{

if (png_state.flags & PNG_USE_CROP) {

int x, y, x1, y1, x2, y2, flag;

int bg = png_state.color_table[0]; /* index of the background color */

gdImagePtr im_crop;

for (flag=0, x1=0; x1 < gdImageSX(png_state.image)-1; x1++) {

for (y=0; y < gdImageSY(png_state.image); y++)

if (gdImageGetPixel(png_state.image, x1, y) != bg) { flag = 1; break; }

if (flag) break;

}

for (flag=0, x2=gdImageSX(png_state.image)-1; x2 >= x1; x2--) {

for (y=0; y < gdImageSY(png_state.image); y++)

if (gdImageGetPixel(png_state.image, x2, y) != bg) { flag = 1; break; }

if (flag) break;

}

for (flag=0, y1=0; y1 < gdImageSY(png_state.image)-1; y1++) {

for (x=x1; x <= x2; x++)

if (gdImageGetPixel(png_state.image, x, y1) != bg) { flag = 1; break; };

if (flag) break;

}

for (flag=0, y2=gdImageSY(png_state.image)-1; y2 >= y1; y2--) {

for (x=x1; x <= x2; x++)

if (gdImageGetPixel(png_state.image, x, y2) != bg) { flag = 1; break; };

if (flag) break;

}

x = x2 - x1 + 1; /* width */

y = y2 - y1 + 1; /* height */

if (png_state.TrueColor)

im_crop = gdImageCreateTrueColor(x,y);

else

im_crop = gdImageCreate(x,y);

if (!im_crop) {

int_warn(NO_CARET,"libgd: failed to create cropped image structure");

return;

}

bg = gdImageColorAllocateAlpha(im_crop,255,255,255,127);

/* FIXME: getting black background for truecolor & transparent */

gdImagePaletteCopy(im_crop, png_state.image);

if (png_state.flags & PNG_USE_TRANSPARENT) {

gdImageColorTransparent(im_crop, bg);

/* WARNING: This is a work-around for strangeness in libgd, */

/* which doesn't copy transparent pixels in TrueColor images. */

if (png_state.TrueColor)

gdImageColorTransparent(png_state.image, -1);

} else

gdImageColorTransparent(im_crop, -1);

gdImageCopy(im_crop, png_state.image, 0, 0, x1, y1, x, y);

gdImageDestroy(png_state.image);

png_state.image = im_crop;

/* Re-set transparency for sixelgd */

if (strcmp("sixelgd", term->name) == 0 &&

png_state.TrueColor && (png_state.flags & PNG_USE_TRANSPARENT)) {

gdImageColorTransparent(png_state.image, png_state.color_table[0]);

}

static int PNG_FillSolid(int fillpar);

static int PNG_FillPattern(int fillpar);

static int PNG_FillTransparent(int fillpar);

static int

PNG_FillSolid(int fillpar)

{

int red = (png_state.rgb >> 16) & 0xff;

int green = (png_state.rgb >> 8) & 0xff;

int blue = png_state.rgb & 0xff;

double fact = (double)(100 - fillpar) * 0.01;

int color;

if (fact <= 0 || fact >= 1.0)

return png_state.color;

red += (0xff - red) * fact;

green += (0xff - green) * fact;

blue += (0xff - blue) * fact;

color = gdImageColorExact(png_state.image, red, green, blue);

if (color < 0) {

color = gdImageColorAllocate(png_state.image, red, green, blue);

}

if (color < 0) {

color = gdImageColorClosest(png_state.image, red, green, blue);

}

return color;

}

static int

PNG_FillTransparent(int fillpar)

{

int red = (png_state.rgb >> 16) & 0xff;

int green = (png_state.rgb >> 8) & 0xff;

int blue = png_state.rgb & 0xff;

int alpha = 127 * (double)(100-fillpar) / 100.;

return gdImageColorExactAlpha(png_state.image, red, green, blue, alpha);

}

static int

PNG_FillPattern(int style)

{

int rgb = png_state.rgb;

int brgb = png_state.rgb_table[0];

int fillpar = (style >> 4) % 8;

style = style & 0xf;

if (!PNG_fill_tile.im || rgb != PNG_fill_tile.last_rgb || PNG_fill_tile.fillpar != fillpar) {

int foreground, background;

if (PNG_fill_tile.im) {

gdImageDestroy(PNG_fill_tile.im);

PNG_fill_tile.im = (gdImagePtr)0;

}

/* save new values */

PNG_fill_tile.fillpar = fillpar;

PNG_fill_tile.last_rgb = rgb;

/* create new tile */

if (!((PNG_fill_tile.im = gdImageCreate(8, 8))))

int_error(NO_CARET,"libgd: failed to create pattern-fill tile");

background = gdImageColorAllocate(PNG_fill_tile.im,

(brgb >> 16) & 0xff, (brgb >> 8) & 0xff, brgb & 0xff);

if (style == FS_TRANSPARENT_PATTERN)

gdImageColorTransparent(PNG_fill_tile.im, background);

gdImageFilledRectangle(PNG_fill_tile.im, 0, 0, 7, 7, background);

/* foreground */

foreground = gdImageColorAllocate(PNG_fill_tile.im,

(rgb >> 16) & 0xff, (rgb >> 8) & 0xff, rgb & 0xff);

switch (fillpar) {

case 0: /* no fill */

default:

break;

case 1: /* cross-hatch */

gdImageLine(PNG_fill_tile.im, 0, 0, 7, 7, foreground);

gdImageLine(PNG_fill_tile.im, 0, 6, 6, 0, foreground);

break;

case 2: /* double cross-hatch */

gdImageLine(PNG_fill_tile.im, 0, 0, 7, 7, foreground);

gdImageLine(PNG_fill_tile.im, 0, 6, 6, 0, foreground);

gdImageLine(PNG_fill_tile.im, 0, 2, 2, 0, foreground);

gdImageLine(PNG_fill_tile.im, 7, 3, 3, 7, foreground);

gdImageLine(PNG_fill_tile.im, 4, 0, 7, 3, foreground);

gdImageLine(PNG_fill_tile.im, 0, 4, 3, 7, foreground);

break;

case 3: /* solid */

gdImageFilledRectangle(PNG_fill_tile.im, 0, 0, 7, 7, foreground);

break;

case 4:

gdImageLine(PNG_fill_tile.im, 0, 0, 7, 7, foreground);

break;

case 5:

gdImageLine(PNG_fill_tile.im, 0, 7, 7, 0, foreground);

break;

case 6:

gdImageLine(PNG_fill_tile.im, 0, 0, 3, 7, foreground);

gdImageLine(PNG_fill_tile.im, 4, 0, 7, 7, foreground);

break;

case 7:

gdImageLine(PNG_fill_tile.im, 0, 7, 3, 0, foreground);

gdImageLine(PNG_fill_tile.im, 4, 7, 7, 0, foreground);

break;

case 8:

gdImageLine(PNG_fill_tile.im, 0, 0, 7, 3, foreground);

gdImageLine(PNG_fill_tile.im, 0, 4, 7, 7, foreground);

break;

case 9:

gdImageLine(PNG_fill_tile.im, 0, 3, 7, 0, foreground);

gdImageLine(PNG_fill_tile.im, 0, 7, 7, 4, foreground);

break;

}

gdImageSetTile(png_state.image, PNG_fill_tile.im);

return (int)gdTiled;

}

static void

PNG_PointX(unsigned int x, unsigned int y)

{

gdImageLine(png_state.image, x - PNG_ps, y - PNG_ps,

x + PNG_ps, y + PNG_ps, png_state.color);

gdImageLine(png_state.image, x + PNG_ps, y - PNG_ps,

x - PNG_ps, y + PNG_ps, png_state.color);

}

static void

PNG_PointPlus(unsigned int x, unsigned int y)

{

gdImageLine(png_state.image, x - PNG_ps, y,

x + PNG_ps, y, png_state.color);

gdImageLine(png_state.image, x, y - PNG_ps,

x, y + PNG_ps, png_state.color);

}

static void

PNG_Triangle(

unsigned int x, unsigned int y,

int direction,

void (*draw_func)(gdImagePtr, gdPointPtr, int, int))

{

int delta = (int)((1.33 * (double)PNG_ps) + 0.5);

int delta_ = (int)((0.67 * (double)PNG_ps) + 0.5);

gdPoint points[4];

points[0].x = x;

points[0].y = y - direction * delta;

points[1].x = x - delta;

points[1].y = y + direction * delta_;

points[2].x = x + delta;

points[2].y = y + direction * delta_;

points[3].x = points[0].x;

points[3].y = points[0].y;

draw_func(png_state.image, points, 4, png_state.color);

}

static void

PNG_Diamond(

unsigned int x, unsigned int y,

void (*draw_func)(gdImagePtr, gdPointPtr, int, int))

{

gdPoint points[5];

points[0].x = x;

points[0].y = y - PNG_ps;

points[1].x = x + PNG_ps;

points[1].y = y;

points[2].x = x;

points[2].y = y + PNG_ps;

points[3].x = x - PNG_ps;

points[3].y = y;

points[4].x = points[0].x;

points[4].y = points[0].y;

draw_func(png_state.image, points, 5, png_state.color);

}

* _options() Called when terminal type is selected.

* This procedure should parse options on the command line. A list of the

* currently selected options should be stored in term_options[] in a form

* suitable for use with the set term command. term_options[] is used by

* the save command. Use options_null() if no options are available.

TERM_PUBLIC void

PNG_options()

{

double tmp;

char *string;

unsigned long color;

TBOOLEAN gif_anim_option = FALSE; /* set to TRUE if an animated gif option given */

if (PNG_initialized != term->name) {

PNG_initialized = term->name;

term_options[0] = '\0';

term->h_char = PNG_HCHAR; /* Default to medium font */

png_state.default_font = gdfont;

png_state.n_colors = 0;

png_state.flags = 0;

png_state.use_builtin = FALSE;

png_state.ttffont = NULL;

png_state.default_ttffont = NULL;

png_state.default_ttfsize = 0;

png_state.fontscale = 1;

png_state.justify = CENTRE;

PNG_linewidth_factor = 1.0;

PNG_dashlength_factor = 1.0;

png_state.capbutt = TRUE; /* Change Jan 2023 */

if (!strcmp(term->name, "gif") || !strcmp(term->name, "sixelgd"))

png_state.TrueColor = FALSE;

else

png_state.TrueColor = TRUE;

#ifdef _WIN32

/* Set the default search path for fonts to something useful. */

if (getenv("GDFONTPATH") == NULL) {

const char fonts[] = "\\fonts";

char *windir = getenv("windir");

if (windir) {

char *gdfontpath = (char *)

gp_alloc(strlen(windir) + strlen(fonts) + 1, "GDFONTPATH");

if (gdfontpath) {

strcpy(gdfontpath, windir);

strcat(gdfontpath, fonts);

SetEnvironmentVariableA("GDFONTPATH", gdfontpath);

free(gdfontpath);

}

#endif

} else {

if (!png_state.default_font) {

int_warn(NO_CARET, "gd.trm: caught initialization error");

png_state.default_font = gdfont;

}

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

/* we are already in animation mode. */

if (almost_equals(c_token-1, "termopt$ion"))

FPRINTF((stderr,"gif: Maintaining animation state\n"));

else {

/* Otherwise reset animation parameters */

if (png_state.previous_image)

gdImageDestroy(png_state.previous_image);

png_state.animate = FALSE;

png_state.previous_image = NULL;

png_state.frame_optimization = FALSE;

png_state.loop_count = 0;

/* And default font size */

term->h_char = PNG_HCHAR;

png_state.default_ttfsize = 0;

PNG_linewidth_factor = 1.0;

PNG_dashlength_factor = 1.0;

/* Default to enhanced text */

term->flags |= TERM_ENHANCED_TEXT;

term->put_text = ENHGD_put_text;

}

while (!END_OF_COMMAND) {

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

case PNG_TRANSPARENT:

png_state.flags |= PNG_USE_TRANSPARENT;

++c_token;

break;

case PNG_NOTRANSPARENT:

png_state.flags &= ~PNG_USE_TRANSPARENT;

++c_token;

break;

case PNG_INTERLACE:

png_state.flags |= PNG_USE_INTERLACE;

++c_token;

break;

case PNG_NOINTERLACE:

png_state.flags &= ~PNG_USE_INTERLACE;

++c_token;

break;

case PNG_CROP:

png_state.flags |= PNG_USE_CROP;

++c_token;

break;

case PNG_NOCROP:

png_state.flags &= ~PNG_USE_CROP;

++c_token;

break;

#ifdef HAVE_GD_TTF

# define UNSET_TTF_FONT \

free(png_state.ttffont); \

png_state.ttffont = NULL; \

png_state.default_ttfsize = 2 * term->h_char - 2; \

png_state.use_builtin = TRUE;

#else

# define UNSET_TTF_FONT \

; /* nothing to do */

#endif

case PNG_TINY:

png_state.default_font = gdFontGetTiny();

term->v_char = png_state.default_font->h;

term->h_char = png_state.default_font->w;

++c_token;

UNSET_TTF_FONT;

break;

case PNG_SMALL:

png_state.default_font = gdFontGetSmall();

term->v_char = png_state.default_font->h;

term->h_char = png_state.default_font->w;

++c_token;

UNSET_TTF_FONT;

break;

case PNG_MEDIUM:

png_state.default_font = gdFontGetMediumBold();

term->v_char = png_state.default_font->h;

term->h_char = png_state.default_font->w;

++c_token;

UNSET_TTF_FONT;

break;

case PNG_LARGE:

png_state.default_font = gdFontGetLarge();

term->v_char = png_state.default_font->h;

term->h_char = png_state.default_font->w;

++c_token;

UNSET_TTF_FONT;

break;

case PNG_GIANT:

png_state.default_font = gdFontGetGiant();

term->v_char = png_state.default_font->h;

term->h_char = png_state.default_font->w;

++c_token;

UNSET_TTF_FONT;

break;

case PNG_FONT:

c_token++;

#ifdef HAVE_GD_TTF

if (END_OF_COMMAND) {

free(png_state.ttffont);

png_state.ttffont = NULL;

png_state.default_ttfsize = 0;

} else {

int brect[8];

char *err;

char *s;

if (isstringvalue(c_token) && (s = try_to_get_string())) {

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

double fontsize;

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

png_state.default_ttfsize = fontsize;

png_state.ttfsize = png_state.default_ttfsize;

*comma = '\0';

}

if (*s) {

free(png_state.ttffont);

png_state.ttffont = s;

} else {

continue;

}

} else {

free(png_state.ttffont);

png_state.ttffont = gp_alloc(token_len(c_token)+1,"new font");

copy_str(png_state.ttffont, c_token, token_len(c_token)+1);

c_token++;

}

free(png_state.default_ttffont);

png_state.default_ttffont = gp_strdup(png_state.ttffont);

/* First try the old GDFONTPATH mechanism for locating fonts */

(void)gdUseFontConfig(0);

err = gdImageStringFT(NULL, &brect[0], 0,

png_state.ttffont, png_state.default_ttfsize*png_state.fontscale,

0.0, 0, 0, "test");

/* If that didn't work, try again using the fontconfig mechanism */

if (err && gdUseFontConfig(1)) {

err = gdImageStringFT(NULL, &brect[0], 0,

png_state.ttffont, png_state.default_ttfsize*png_state.fontscale,

0.0, 0, 0, "test");

}

/* If we still haven't found the font, punt to the internal non-TTF default set */

if (err) {

fprintf(stderr, "%s when opening font %s, trying default\n",

err, png_state.ttffont);

free(png_state.ttffont);

free(png_state.default_ttffont);

png_state.ttffont = NULL;

png_state.default_ttffont = NULL;

}

#else

c_token++;

fprintf(stderr,"No TTF font support, using internal non-scalable font\n");

#endif

break;

# undef UNSET_TTF_FONT

case PNG_FONTSCALE:

c_token++;

png_state.fontscale = END_OF_COMMAND ? 1 : real_expression();

if (png_state.fontscale <= 0)

png_state.fontscale = 1.;

break;

case PNG_SIZE:

c_token++;

if (END_OF_COMMAND) {

PNG_XMAX = GREG_XMAX;

PNG_YMAX = GREG_YMAX;

} else {

PNG_XMAX = real_expression();

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

c_token++;

PNG_YMAX = real_expression();

}

if (PNG_XMAX <= 0)

PNG_XMAX = GREG_XMAX;

if (PNG_YMAX <= 0)

PNG_YMAX = GREG_YMAX;

}

term->ymax = PNG_YMAX;

term->xmax = PNG_XMAX;

/* EAM Apr 2003 - same tic size on both x and y axes */

term->v_tic = (PNG_XMAX < PNG_YMAX) ? PNG_XMAX/100 : PNG_YMAX/100;

if (term->v_tic < 1)

term->v_tic = 1;

term->h_tic = term->v_tic;

break;

case PNG_ENHANCED:

term->flags |= TERM_ENHANCED_TEXT;

term->put_text = ENHGD_put_text;

++c_token;

break;

case PNG_NOENHANCED:

term->flags &= ~TERM_ENHANCED_TEXT;

term->put_text = PNG_put_text;

++c_token;

break;

case PNG_TRUECOLOR:

png_state.TrueColor = TRUE;

term->flags |= TERM_ALPHA_CHANNEL;

c_token++;

break;

case PNG_NOTRUECOLOR:

png_state.TrueColor = FALSE;

term->flags &= ~TERM_ALPHA_CHANNEL;

c_token++;

break;

case PNG_LINEWIDTH:

c_token++;

PNG_linewidth_factor = real_expression();

if (PNG_linewidth_factor < 0)

PNG_linewidth_factor = 1.0;

break;

case PNG_DASHLENGTH:

c_token++;

PNG_dashlength_factor = real_expression();

if (PNG_dashlength_factor <= 0.2)

PNG_dashlength_factor = 1.0;

break;

/* anchor/scroll choice for sixel and kitty in-terminal output */

case PNG_ANCHOR:

c_token++;

png_state.anchor = TRUE;

break;

case PNG_SCROLL:

c_token++;

png_state.anchor = FALSE;

break;

/* parse gif animation options */

case GIF_ANIMATE:

c_token++;

if (strncmp("gif",term->name,3) == 0) {

gif_anim_option = 1;

} else if (strncmp("sixel",term->name,5) == 0) {

png_state.anchor = TRUE;

break;

} else if (strncmp("kitty",term->name,5) == 0) {

png_state.anchor = TRUE;

break;

} else {

int_error(c_token,"This terminal does not support animation");

}

png_state.animate = TRUE;

png_state.frame_count = 0;

png_state.frame_delay = 10;

png_state.frame_optimization = FALSE;

break;

case GIF_DELAY:

if (strncmp("gif",term->name,3))

int_warn(c_token,"This terminal does not support animation");

c_token++;

png_state.frame_delay = int_expression();

if (png_state.frame_delay <= 0)

png_state.frame_delay = 10;

gif_anim_option = 1;

break;

case GIF_LOOP:

if (strncmp("gif",term->name,3))

int_warn(c_token,"This terminal does not support animation");

c_token++;

png_state.loop_count = int_expression();

gif_anim_option = 1;

break;

case GIF_NOOPT:

if (strncmp("gif",term->name,3))

int_warn(c_token,"This terminal does not support animation");

c_token++;

png_state.frame_optimization = FALSE;

gif_anim_option = 1;

break;

case GIF_OPT:

if (strncmp("gif",term->name,3))

int_warn(c_token,"This terminal does not support animation");

c_token++;

png_state.frame_optimization = TRUE;

gif_anim_option = 1;

break;

case PNG_BUTT:

png_state.capbutt = TRUE;

c_token++;

break;

case PNG_ROUNDED:

png_state.capbutt = FALSE;

c_token++;

break;

case PNG_BACKGROUND:

c_token++;

png_state.rgb_table[0] = parse_color_name();

png_state.n_colors = 1;

break;

case PNG_OTHER:

default:

/* not "size" */

string = gp_input_line + token[c_token].start_index;

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

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