===============================================================================

The gnuplot code base moved from cvs to git in November 2017.

Use "git log" to track development after that point.

===============================================================================

2018-08-21 Ethan A Merritt <[email protected]>

* src/plot3d.c: Allow dgrid3d re-gridding to include palette color

information from a separate input data column, so long as the dgrid3d

option is not "splines".

2018-08-11 Ethan A Merritt <[email protected]>

* term/linux.trm term/vgagl.trm term/linux-vgagl.trm:

Remove linux and vgagl terminals and configuration option

--with-linux-vga. Add a place holder linux-vgagl.trm that provides a

documentation section recommending yaft + sixel graphics as an

alternative way to run gnuplot from the linux console.

2018-07-13 Ethan A Merritt <[email protected]>

* src/gp_types.h src/plot3d.c src/pm3d.c: Allow per-plot fillcolor

pm3d surfaces "splot ... with pm3d fillcolor <rgbvalue>".

2018-07-12 Ethan A Merritt <[email protected]>

* src/pm3d.c src/color.c: Remove undocumented EXPERIMENTAL option

PM3D_CONTOURS. There are serious problems with the approach such

that it is probably no useful as a starting point for coding

solid-fill contours.

2018-07-12 Ethan A Merritt <[email protected]>

* configure.ac src/color.c src/color.h src/pm3d.c:

Remove support for compile option EXTENDED_COLOR_SPECS.

This was used only by vgagl.trm but required maintaining a separate

code path for coloring pm3d quadrangles for all terminals. This

alternative code path did not know about new pm3d color options and

may no longer work at all. Removing the conditional code breaks

vgagl.trm, which can be fixed later.

2018-06-09 Ethan A Merritt <[email protected]>

* src/gadgets.c (draw_clip_arrow) term/lua.trm term/lua/gnuplot-tikz.lua

Some terminals that provide a private term->arrow function were

adversely affected by addition of flag HEADS_ONLY in commit ad80fe530.

This commit does two things.

1) It teaches the tikz terminal about HEADS_ONLY so that the short

vector variant works correctly.

2) The core routine draw_clip_arrow only uses the 2-step drawing process

for vectors that are short (for a rather ad hoc definition of "short").

2018-05-16 Miroslav Sulc <[email protected]>

* src/misc.c: Support ARGC/ARGV parameter convention for "call".

I.e. string variables ARG1 ARG2 ... are also accessible as

ARGV[1] ARGV[2] ... ARGV[ARGC].

2018-04-28 Ethan A Merritt <[email protected]>

* configure.ac src/term.h: ./configure --without-tektronix

to disable support for various 1970s/80s era terminal emulators.

Terminal types included (or not):

tek410x tek40 vttek xterm kc_tek40 km_tek40 selanar sixeltek bitgraph

Notes:

To actually include some of these it is also necessary to enable

the generic bitmap code:

./configure --with-tektronix --with-bitmap-terminals

Unless for some reason you really need to communicate using tektronix

terminal graphics protocol, the prefered option is to use a terminal

emulator that supports the vt100 series sixel graphics protocol and

select the sixelgd terminal in gnuplot. You do not need the tektronix

terminal code for this.

2018-04-16 Miroslav Sulc <[email protected]>

* src/internal.c (f_div cmplx_divide): Avoid overflow during complex

division (actually all floating point division).

Use formula 5.4.5 from Numerical Recipes 2nd Edition to prevent

avoidable overflow, underflow, and/or loss of precision.

E.g. the result of 1.e200/1.e200 is 1.0 rather than NaN, and

1/1.e200 is 1.e-200 rather than 0.

2018-04-15 Miroslav Sulc <[email protected]>

* src/eval.c src/specfun.c src/specfun.h:

Add function besin(n,x), modified Bessel function of order n for

integer n. The code is based on that for iv(v, x) as implemented in

scipy (from numpy). Accuracy was tested by comparing output from

scipy and gnuplot. The underlying function iv(v,x) accepts fractional v

but does not converge well for non-integer values. Thus besin(n,x)

limits the domain to integer n.

2018-04-06 Miroslav Sulc <[email protected]>

* src/eval.c src/standard.c src/standard.h:

Add functions besi0(x) besi1(x), modified Bessel functions of order

0 and 1. The code is adapted from the cephes library

http://www.netlib.org/cephes/index.html

claimed accuracy is 6e-16 for besi0() 2e-15 for besi1() using

IEEE double precision floating point.

2018-02-11 Marko Karjalainen <[email protected]>

* term/js/gnuplot_svg.js: Revise javascript support for mouse and

keyboard interaction with svg output

Mouse:

left click toggle mouse tracking, drag plot

right click reset mouse zoom and pan

wheel zoom/unzoom

Keyboard:

arrows (event may be stolen by browser)

+/- zoom/unzoom

Home reset mouse zoom and pan

# toggle grid

Keyboard events are not passed to elements included by <embed src=foo>.

Keyboard events must be forwarded separately to elements included by

<object data=foo>.

2018-02-08 Ethan A Merritt <[email protected]>

* term/svg.trm:

The combination "set term svg mousing background 'black'" set the

background to white instead.

2018-02-08 Bastian Maerkisch <[email protected]>

* src/win/winmain.c|h (main, WinOpenConsole)

term/caca.trm (CACA_init_display): Only try to set a console event

handler if a console is open. Otherwise the call would not succeed on

some Windows versions.

* term/caca.trm: Re-evaluate the console's codepage on every plot.

* term/caca.trm (CACA_text): libcaca seems to leave the Windows

console in wide character mode. This results in an extra space

printed with every character. We now explicitly reset text mode.

2018-02-08 Bastian Maerkisch <[email protected]>

* src/command.c src/datablock.c|h: This patch splits lines containing

newline characters into multiple lines when the target of a print

command is a datablock. That way we can e.g. get a datablock with

names of files on Windows:

set print $d; print system("dir /a-d /b *"); unset print;

print |$d|

Patch #754

2018-01-30 Ethan A Merritt <[email protected]>

* term/canvas.trm: Always apply term->set_color(), including optional

alpha channel, to both strokeStyle and fillStyle. This allows the

canvas terminal to honor RGBA colors for points and lines as well as

for area fill. Other terminals got this fix way back in version 4.6.

This change does not affect the javascript support routines so there

should be no backward-compatability issues.

Bug #2013

2018-01-26 Ethan A Merritt <[email protected]>

* src/eval.* src/internal.c src/plot.c src/set.c src/show.c

src/standard.c src/tables.* src/unset.c demo/overflow.dem:

Overflow handling for 64-bit integer arithmetic

Syntax:

set overflow {float | NaN | undefined}

unset overflow

Gnuplot now supports 64-bit integer arithmetic.

This means that for values from 2^53 to 2^63 (roughly 10^16 to 10^19)

integer evaluation preserves more precision than evaluation using

IEEE 754 floating point arithmetic. However unlike the IEEE floating

point representation, which sacrifices precision to span a total range

of roughly [-10^307 : 10^307], integer operations that result in values

outside the range [-2^63 : 2^63] overflow. The 'set overflow' command

lets you control what happens in case of overflow.

`set overflow` is the same as `set overflow float`. It causes the

result to be returned as a real number rather than as an integer.

This is the default.

The command `unset overflow` causes integer arithmetic overflow to be

ignored. No error is shown. You may want this if your platform allows

only 32-bit integer arithmetic and you want to approximate the behaviour

of gnuplot versions prior to 5.3.

The `reset` command does not affect the state of overflow handling.

Earlier gnuplot versions were limited to 32-bit arithmetic and ignored

integer overflow. Note, however, that some built-in operators did not

use integer arithemetic at all, even when given integer arguments. This

included the exponentiation operator N**M and the summation operator

(see `summation`). These operations now return an integer value when

given integer arguments, making them potentially susceptible to overflow

and thus affected by the state of `set overflow`.

set overflow float

------------------

If an integer arithmetic expression overflows the limiting range,

[-2^63 : 2^63] for 64-bit integers, the result is returned as a

floating point value instead. This is not treated as an error.

Example:

gnuplot> set overflow float

gnuplot> A = 2**62 - 1; print A, A+A, A+A+A

4611686018427387903 9223372036854775806 1.38350580552822e+19

set overflow NaN

----------------

If an integer arithmetic expression overflows the limiting range,

[-2^63 : 2^63] for 64-bit integers, the result is returned as NaN

(Not a Number). This is not treated as an error.

Example:

gnuplot> set overflow NaN

gnuplot> print 10**18, 10**19

1000000000000000000 NaN

set overflow undefined

----------------------

If an integer arithmetic expression overflows the limiting range,

[-2^63 : 2^63] for 64-bit integers, the result is undefined.

This is treated as an error.

2018-01-26 Ethan A Merritt <[email protected]>

* configure.ac src/datafile.c src/eval.* src/fit.c src/gp_types.h

src/internal.c src/misc.c src/parse.* src/save.c src/set.c src/show.c

src/standard.c src/stdfn.h src/syscfg.h src/util.c term/canvas.trm

term/svg.trm demo/int64.dem docs/gnuplot.doc:

Add support for 64-bit integer arithmetic

Add 64-bit integer support throughout gnuplot's internal expression

evaluation routines. All arithmetic and logical operations now use

64-bit arithmetic if the platform supports it. INTGR variables are now

typedef intgr_t, which is either int64_t (if the platform supports it)

or int.

Arithmetic operations on integers return INTGR if possible

(this is a CHANGE). E.g. The factorial operator returns an integer

when N! is sufficiently small (N <= 20 for 64-bit integers).

It returns a floating point approximation for larger values of N.

2018-01-11 Ulrich Müller <[email protected]>

* configure.ac src/term.h: Configuration option --with-regis

to include support for ReGIS terminal driver

2018-01-10 Ethan A Merritt <[email protected]>

* src/time.c (xstrftime) internal.c (f_strftime): Protect against

buffer overflow from user-supplied time format string. E.g.

print time(0,"%100tH%D")

Bug #2009

2018-01-05 Ethan A Merritt <[email protected]>

* src/history.c: If ./configure --disable-history-file or

--without-readline then do not try to build the routine that reads a

history file. Whether --without-readline should really disable

history is another question, but that is a configuration issue not a

compile issue.

Bug #2008

2017-12-29 Ethan A Merritt <[email protected]>

* src/gadgets.* src/graphics.c src/save.c src/set.c src/show.c

src/unset.c: New command "set clip radial" for polar plot with lines

Radial clipping to the bounding circle of a polar plot still depends on

the existing criteria "set clip {one|two}".

set polar; set rrange [0:RMAX]

set clip two; set clip radial

plot $FOO with lines

If two successive points in $FOO are outside the bounding circle

(R > RMAX) a clipped portion of the line between them will be drawn.

If 'unset clip two' no portion of this line will be drawn.

New routine draw_polar_clip_line() used for "plot ... with lines"

in polar mode. Other possible uses are polar plots with vectors,

impulses, polygons.

2017-12-28 Rin Okuyama <[email protected]>

* configure.ac src/readline.* src/term.c src/qtterminal/qt_term.cpp

src/wxterminal/wxt_gui.* term/x11.trm:

Gnuplot does not suspend immediately by Control-z when it is configured

--with-readline=gnu; suspension is triggered by a subsequent input

character.

When SIGTSTP is received, the signal handler of readline sets a flag

and just returns. Routines of readline check this flag to invoke the

real handler to suspend. Since we replace rl_getc_function by our own

routine to catch input from mouse, we should also check this flag to

invoke the real handler. Othewise, we cannot suspend until next time

routines of readline are used.

Unfortunately, there is no portable ways to invoke the real handler of

readline at the moment. We need to use its internal routine. libreadline

will implement a public function for this purpose in a future release.

EAM: Original patch included the wrapper code directly in x11.trm;

I moved it into a separate routine wrap_readline_signal_handler()

so that it can be shared by other gnuplot terminals.

Bug #2002

2017-12-26 Bastian Maerkisch <[email protected]>

* src/Makefile.am config/mingw/Makefile config/msvc/Makefile:

Generation of the timestamp relied on the latest date in the ChangeLog.

This may no longer be correct. Instead, we now query git for the last

commit date. Only works for development builds from a git checkout, but

for release builds the date is hard-coded in src/version.c.

2017-12-03 Bastian Maerkisch <[email protected]>

* .gitattributes: ChangeLogs are prone to merge errors. The GNU tool

git-merge-changelog has been developed to avoid that and is likely

available in most distributions. Caveat is that git committers now

need it to be installed and configured, see e.g.,

https://gnu.wildebeest.org/blog/mjw/2012/03/16/automagically-merging-changelog-files-with-mercurial-or-git/

2017-12-04 Bastian Maerkisch <[email protected]>

* term/caca.trm (CACA_text): Test for input redirection. Resolves

hang with slang/ncurses drivers in

gnuplot -e "load 'simple.dem'" < /bin/true

2017-12-03 Bastian Maerkisch <[email protected]>

* term/caca.trm: Add an emacs type modeline.

2017-11-25 Bastian Maerkisch <[email protected]>

* .gitattributes src/os2/4allterm.cmd: Enforce EOL style or treatment

as binary for certain file types.

2017-11-24 Bastian Maerkisch <[email protected]>

* term/caca.trm: The raw and null libcaca drivers don't do anything

useful for us. So don't include them in the list of available drivers

shown to the user.

* term/caca.trm: Various range and null pointer checks to avoid

segfaults when using the raw and null drivers. Still these won't

produce any useful output.

* term/caca.trm (CACA_init_display): On Windows, disable the

console's quick edit mode to directly enable mouse interaction.

* term/caca.trm (CACA_process_events): Failed to change internal

canvas size on window resize. Bugfix.

* term/caca.trm (CACA_waitforinput): Correct the check if the caca

driver window was closed. This bug would cause gnuplot to exit on

the first keypress after closing the window.

Bugfix.

* term/caca.trm: Simple bold / italic font support. libcaca supports

theses attributes currently only for ncurses, html, html3, bbfr, and

troff.

2017-11-15 Ethan A Merritt <[email protected]>

* src/gadgets.h src/graphics.c src/graphics.h src/set.c demo/3DBox.dem:

Trial implementation and demo for grid walls.

Each wall is a solid-fill areas that lies on the xy xz or yz plane in

a 3D plot. I.e. it is one side of the brick that bounds the plot volume.

Panels use neither pm3d nor hidden3d code. Instead they add a two-state

"layer" to polygon objects. For testing purposes this is activated by

"set object N polygon fb"

The intent should be clear from walls.dem. Spin the view around

and notice that the walls do not act like normal objects.

The intent is to control the properties (color, etc) of each wall

using the new command

set wall {x0|y0|z0|x1|y1} {<various properties>}

As of this version all you can do is set/unset them

2017-11-12 Dima Kogan <[email protected]>

* src/axis.c src/axis.h src/boundary.c src/gadgets.c src/gadgets.h

src/graph3d.c src/graph3d.h src/graphics.c src/util3d.c src/util3d.h:

Series of patches to track vector endpoints, and 3D coordinates in

general, keeping a floating point representation of terminal coordinates

rather than integer. This keeps sufficient precision for very short

vectors that the arrowhead can be drawn accurately even as the length

approaches zero. The routine draw_clip_arrow() becomes the one and only

caller of term->arrow(). All 2D and 3D vectors and arrows use it.

2017-11-12 Ethan A Merritt <[email protected]>

* src/gadgets.c (do_clip_arrow) src/gadgets.h src/term.c src/term_api.h:

Don't misuse the bitfield t_arrow_style by treating it as an integer.

Instead add bitflags HEADS_ONLY SHAFT_ONLY.

2017-11-11 Ethan A Merritt <[email protected]>

* term/post.trm term/pslatex.trm: The postscript terminals have had a

private routine PS_arrow that calls do_arrow() twice, once as-is and a

second time with linetype forced to solid. This was supposed to trigger

only if the terminal was in "dashed" mode, so that arrowheads were not

dashed. In version 5 the test doesn't work and so so the second call

was always made. Furthermore if the no-dashed-arrowheads restriction is

to be kept, all terminals need it. Remove PS_arrow() and shift the

postscript terminals back to using do_arrow().

2017-11-11 Hans-Bernhard Broeker <[email protected]>

* prepare (AUTOMAKE): Remove permission fix-up commands, in favour

of letting git handle this.

* missing, config/djconfig.sh: Set permissions to executable.

2017-11-08 Ethan A Merritt <[email protected]>

* src/set.c (set_logscale): If the axis is currently autoscaled and

the range limits still hold non-positive values from a previous state,

reset them to [0.1 : 10.].

2017-11-06 Ethan A Merritt <[email protected]>

* term/lua.trm term/lua/gnuplot-tikz.lua: Restore version information

(mangled during cvs->git conversion).

* demo/gnuplot.rot: Use version 5 syntax for iteration

* demo/label_stacked_histograms.dem: New demo from <[email protected]>

* demo/all.dem: Call new demo, skip [slow-ish] animation by default.

2017-11-06 Ethan A Merritt <[email protected]>

* src/getcolor.c src/getcolor.h src/save.c src/show.c src/tables.c

term/context.trm term/post.trm docs/gnuplot.doc demo/pm3dcolors.dem:

Remove vestigial implementation of YIQ colorspace.

The YIQ colorspace option for "set palette" was incorrectly implemented

back in the mists of time. E.g. the parsing code enforces color

component range [0:1] but YIQ coefficients can be negative; syntax for

"set palette defined" is incompatible with negative values; YIQ_2_RGB

uses incorrect transformation matrix. No user interface to YIQ_2_RGB

was provided. Thanks to Isao MORI <[email protected]> for pointing

out the various fundamental flaws.

2017-11-06 Ethan A Merritt <[email protected]>

* src/contour.c src/contour.h src/graph3d.c src/save.c src/set.c

src/show.c src/unset.c docs/gnuplot.doc demo/custom_contours.dem:

New options for customizing contour lines

set cntrparam {firstlinetype N} {{un}sorted}

The 'firstlinetype' option allows you to set linetype properties for

a block of linetypes, including dot-dash patterns, and then specify

that these customized linetypes be used to generate contour lines.

In this case you probably want to also use the other new keyword

'sorted' because by default contour lines are not generated in

consistent ascending order.

Bugs #1603 #1612

* src/graph3d.c (do_3dplot): It could be that you want contour lines to

opt out of hidden3d processing, e.g. because it messes up dashed lines.

Since the low-level routines that draw the contour line segments look

only at the global "hidden3d" flag, we must save/clear/restore this flag

if the individual plot is marked "nohidden" (plot->opt_out_of_hidden3d).

2017-11-06 Achim Gratz <[email protected]>

* configure.ac: The configury supposedly tried to find TEXDIR via

kpsexpand, but that code never gets run if $prefix is set.

2017-11-06 Ethan A Merritt <[email protected]>

* src/axis.c (gen_tics): `set log x; set xtics foo` would always place

the first axis tic at foo rather than at (foo / base^N) for suitable N.

* src/graphics.c (plot_betweencurves):

plot 'foo with filledcurves below y=bar

would fail to identify "below" regions where the y value of the

start or end data point was exactly (foo[x] == bar).

Bug #1983

2017-11-06 Bastian Maerkisch <[email protected]>

* src/win/winmain.c (ConsolePutS, ConsolePutCh): Use standard file IO

instead of Console API to enable word-wrapping on Windows 10 and to

allow for redirection of stdout/stderr.

Bug #1985

2017-11-06 Ethan A Merritt <[email protected]>

* term/post.trm: Raise the maximum number of relative moves before a

stroke so that a full circle as drawn by do_arc() does not glitch due

to insertion of a "stroke xx yy M" sequence that resets the dot/dash

pattern.

Bug #1987

2017-11-03 Ethan A Merritt <[email protected]>

* src/plot2d.c(eval_plots): Fix a regression.

Emply y range for logscale y errors out rather than auto-extending the

range with a warning. Extension can be handled by the same routine

used for linear axes.

Bug #1978

2017-11-02 Ethan A Merritt <[email protected]>

* docs/gnuplot.doc src/gadgets.c: Remove obsolete comments and trivial

typos. Add documentation section for piped input data.

2017-11-01 Ethan A Merritt <[email protected]>

* src/plot2d.c (histogram_range_fiddling): For stacked histograms,

autoscaling did not distinguish between 'set xrange [*:*]' and

'set xrange [explicit_min:*]', always resetting min to -1.

Bugfix

2017-10-30 Ethan A Merritt <[email protected]>

* src/gadgets.c (draw_clip_arrow): Do not call term->arrow() if the

entire arrow is out of range.

* src/graphics.c (plot_vectors): The code for 2D "plot with vectors"

is redundant. Replace the core of it with a call to draw_clip_arrow().

* src/boundary.c (do_key_sample): Illustrate revision of a

draw_clip_arrow() call site to use (double) rather than (int)

parameters. The only reason for this is to allow draw_clip_arrow()

itself to switch to (double) parameters if we decide that is useful,

e.g. to handle arrows with length approaching zero.

2017-10-13 Petr Mikulik <[email protected]>

* src/pm3d.c (pm3d_draw_one pm3d_plot): Move call of term->layer() with

TERM_LAYER_BEGIN_PM3D_MAP and TERM_LAYER_END_PM3D_MAP from pm3d_draw_one

to pm3d_plot in order to avoid insertion of line commands between the

%pm3d_map_begin and pm3d surface commands in the postscript file

which broke the pm3dCompress.awk and pm3dConvertToImage.awk scripts.

2017-10-11 Ethan A Merritt <[email protected]>

* src/axis.c (gen_tics): The start point for log-scale tic placement

could not lie outside the axis range (e.g. start at 1 for axis range

[5:50]). Remove this restriction. Still not perfect backwards

compatibility with log-scale tic placement in earlier versions.

2017-10-09 Ethan A Merritt <[email protected]>

* src/datafile.c (df_generate_pseudodata): The sample-generation code

failed to distinguish between nonlinear x2 (primary axis hidden) and

"set link x2 via f(x) inv g(x)" (primary axis x1).

Bug #1973

* src/graphics.h src/unset.c: We have an enum AXIS_INDEX. Use it.

(mostly to aid debugging; shouldn't affect code generation).

2017-10-08 Ethan A Merritt <[email protected]>

* src/axis.c (reconcile_linked_axes) src/axis.h src/plot2d.c:

gnuplot version 5.0 always tracked the autoscale range on the primary

axis (x1 or y1) of a linked pair, even if the data was actually plotted

on x2 or y2. In verison 5.2 we track the data range on x1 x2 y1 y2

separately. This caused breakage wherever the program assumed the

autoscale range on x1 (or y1) was always current. Worse, it would

propagate that range onto the secondary axis, possibly overwriting the

correct range. Now we introduce a new routine reconcile_linked_axes()

that merges the min/max values from e.g. x1 and x2 so that the

autoscaled range covers input data plotted on either axis.

Bug #1973

* demo/linked_autoscale.dem: Exercise the new code (fails on previous

gnuplot versions).

2017-10-06 Hans-Bernhard Broeker <[email protected]>

* src/command.c: Move WEXITSTATUS fall-back definition away from here.

* src/syscfg.h: Include <sys/wait.h>, if it exists.

(WEXITSTATUS): Provide fall-back definition, if none in

<sys/wait.h>. Move MS Windows specific replacement from command.c

to here.

* configure.ac: Add call to AC_HEADER_SYS_WAIT

2017-10-06 Bastian Maerkisch <[email protected]>

* config/mingw/Makefile: Add helpfiles to "all" target, including

the japanese version. Remove helpfile from default target.

* config/mingw/Makefile: Default to Mingw-w64 and Direct2D v1.1.

Note that building using Mingw32 currently does not work anyway

due to missing headers libraries for newer Windows APIs.

* config/mingw/Makefile: Add a note that secure APIs are required

(pointed out by Allin Cottrell on the mailing list).

* config/msvc/Makefile: Build and install support files for the

lua/tikz terminal.

src/win/wgnuplot.mnu: Add menu items to edit gnuplot.ini and

wgnuplot.ini to 'Help' menu.

2017-10-05 Bastian Maerkisch <[email protected]>

* src/win/wd2d.cpp: Enable color font support. This enables colored

emojis, which can be used e.g. as point symbols. Due to the default

font-fallback to "Segoe UI Emoji", this might lead to unexpected

results if a plot relied on non-colored character fallbacks.

2017-10-03 Ethan A Merritt <[email protected]>

* term/gd.trm: Report number of frames in completed animation sequence.

2017-10-01 Bastian Maerkisch <[email protected]>

* src/win/winmain.c|h src/command.c: For wgnuplot, open or attach to a

console when executing system commands so we can its the output. That

in my option eliminates the last benefit of wgnuplot_pipes over

wgnuplot. Note that the process terminates if the new console is

closed, just as is the case with wgnuplot_pipes, but the console is

only opened when actually required.

2017-09-29 Ethan A Merritt <[email protected]>

* src/axis.h src/axis.c (axis_set_scale_and_range): Incorrect use

of unsigned parameters caused terminal scaling to fail if the axis

range was inverted. The error was introduced by converting from a

macro to a subroutine in the run-up to 5.2.

* src/gadgets.h src/graphics.c src/misc.c src/plot2d.c src/set.c

src/tables.h: Rework parsing and handling of filledcurve options.

* src/command.c (array_command): Allow size of an array to be

determined automatically from the number of initializers. E.g.

array A = ["a","b","c"]

2017-09-25 Ethan A Merritt <[email protected]>

* src/plot2d.c: smoothing options csplines|acsplines|bezier|sbezier

failed to recheck inrange/outrange after smoothing. Example failure:

plot [0:4][4:0] '+' using 1:1 smooth bezier w lines

Bugfix

2017-09-23 Ethan A Merritt <[email protected]>

* src/axis.c (gen_tics) docs/gnuplot.doc demo/nonlinear6.dem:

Revise documentation of "set xtics" to include examples and description

of logscale keyword. Restore pre-5.2 behaviour that for log-scaled axes

the increment in "set xtics {start,} incr {,end}" is interpreted as a

multiplicative factor rather than a constant interval. However this is

only true if the "logscale" attribute is set for axis tics.

New demo nonlinear6.dem exercises this feature and also shows the use of

"set tics rangelimit" with log-scaled axes.

Bug #1971

* src/interpol.c (mcs_interp): The previous implementation of monotonic

cubic splines did not guarantee that the original points were included

in the set of generated points used to draw the resulting curve. This

meant that the curve might not pass through all points. Now we merge

the original points with the set of evenly sampled points.

Thanks to K Antal for identifying and demonstrating the problem.

Patch/Bug #1972

2017-09-21 Ethan A Merritt <[email protected]>

* term/cairo.trm (cairotrm_reset): Still trying to get this right.

2017-09-20 Ethan A Merritt <[email protected]>

* term/cairo.trm (cairotrm_reset): Revert change.

2017-09-19 Ethan A Merritt <[email protected]>

* term/cairo.trm (cairotrm_init cairotrm_reset): Valgrind complained

that calling cairo_destroy(plot.cr) on exit triggered multiple reads

of previously-freed data. It seems preferable to not call it on exit.

It does make sense to call it if the terminal has been closed and then

reopened. So we fix the ordering of code in cairotrm_init that

frees the old plot.cr before reinitializing a new one.

REVERT: This change caused some cairo installations to close pdf output

file without proper termination of the contents.

* src/parse.c (parse_array_assignment): Memory leak.

* src/interpol.c: Dead code.

* src/Makefile.am: Fix recipe for building qt embed_example

2017-09-18 Ethan A Merritt <[email protected]>

* src/datafile.c (f_columnhead df_set_key_title) src/datafile.h

src/eval.h src/parse.c (create_call_columnhead) src/parse.h

src/plot2d.h src/plot2d.c (reevaluate_plot_title) src/plot3d.c:

Defer evaluation of "plot ... title <string-expression>" until after

data is read in. This is important mostly for the case where the plot

title contains text taken from a data column header. We can now drop

an imperfect workaround that initially stored the title as

@COLUMNHEADXXXX@ and then later replaced the placeholder text with

the real column header text.

Bug #1968

* demo/columnhead.dem demo/html/*: Add a demo for the new capability.

2017-09-17 Ethan A Merritt <[email protected]>

* src/set.c (parse_label_options): Memory leak.

* src/graph3d.c src/plot3d.c: Initialize to prevent compilere warnings.

2017-09-15 Ethan A Merritt <[email protected]>

* src/plot2d.c src/plot3d.c: Starting in version 5, NaN and UNDEFINED

input data points count toward the total number of points read. This

caused the test for "no points read" to not terminate iterations of the

form "for [i=min:*] ..." on the first missing file or invalid spec.

To prevent runaway iteration we now test for "no INRANGE points read in".

* src/datafile.c (f_columnhead): columnhead(N) invoked inside a using

specifier now returns the actual column header.

See Bug #1968

2017-09-13 Ethan A Merritt <[email protected]>

* src/graphics.c src/graph3d.c: The "title at {beg|end|<position>}"

options were originally intended as an alternative to the normal key,

so preservation of the key layout was not a concern. This patch allows

you to mix custom-placed titles with in-key titles in the same plot.

Bug #1967

2017-09-11 Ethan A Merritt <[email protected]>

* src/graphics.c src/graphics.h src/set.c src/tables.c src/tables.h

src/unset.c src/show.c src/save.c demo/image2.dem docs/gnuplot.doc:

The default interpretation of RGB color components on input is that

they are integer values in the range [0:255]. This matches the

content of PNG and JPEG files. Since the interpretation of RGB color

components has been decoupled from the palette range limits controlled

by "set cbrange", data using some other RGB convention must be

rescaled. This patch introduces a new command `set rgbmax`.

The primary use is so that data using the convention that color

components are floating point values in the range [0:1] can be

plotted using

set rgbmax 1.0; plot 'imagedata' with rgbimage

* src/graphics.c (map_position_double): It is pointless to test for

logscale in the "else" clause of an "if" statement that handles

nonlinear axes.

2017-09-10 Ethan A Merritt <[email protected]>

* src/axis.c( gen_tics ) src/axis.h( reorder_if_necessary ):

New macro to reorder the min/max of axis ranges (but could be used

elsewhere). If the mapping function of linked axes inverts the

axis direction, tics were not being generated because min > max.

E.g. set link x2 via 100-x inv 100-x; set x2tics; plot [50:40] x

* src/axis.c (parse_range): Refactor parse_range() to handle

in-line ranges for linked or nonlinear axes.

Bug #1964

* src/graphics.c (plot_border) src/boundary.c (boundary):

Range-limited axes were not accounting for nonlinear or linked axes.

Space reserved for long axis tic labels made the same mistake.

Bug #1965

2017-09-05 Ethan A Merritt <[email protected]>

* src/axis.c src/axis.h src/datafile.c src/gp_time.h src/gp_types.h

src/internal.c src/time.c demo/timedat.dem docs/gnuplot.doc:

Gnuplot already supports relative time format specifiers %tH %tM %tS

for output via strftime() and in the time format for axis tic labels.

Now we add the same format specifiers as an option for input via

strptime(). They can also be used to read data fields containing

degrees/minutes/seconds.

2017-09-04 Dima Kogan <[email protected]>

* src/axis.c (clone_linked_axes): When sanity checking the via/inverse

mapping functions for linked or nonlinear axes, adjust the allowable

difference by a scale factor related to the axis range.

* configure.ac: Add $LIBRARIES_FOR_X to WX_LIBS so that it pickes

up -lX11 as required by wxgtk3

2017-09-04 Ethan A Merritt <[email protected]>

* src/set.c src/tables.c src/tables.h src/unset.c src/util.c

src/util.h src/show.c: Developer-only command "set debug <val>"

intended to facilitate A/B testing of new code. Trial code can be

wrapped in a test such as

if (debug > 0) { execute trial code }

2017-09-03 Daniel J Sebald <[email protected]>

* configure.ac: Use AC_MSG_RESULT rather than AC_MSG_WARN to report

which Qt version will be used.

2017-09-03 Ethan A Merritt <[email protected]>

* src/time.c (xstrftime): The variant format specs for time

%tH %tM did not behave as documented in that hours wrapped at 24 and

minutes at 60 if the decimal precision modifier was missing.

2017-09-02 Ethan A Merritt <[email protected]>

* src/axis.c (parse_range eval_link_function) docs/gnuplot.doc:

Attempt to handle the case of linked axes (x+x2 or y+y2) and an in-line

range specifier in the plot statement. This fix only addresses simple

cases, such as

set link x2; plot [x=min:max] something-using-x2 axes x2y1

Recommend to use separate "set xrange ... set yrange ..." instead.

2017-09-01 Bastian Maerkisch <[email protected]>

* src/win/winmain.c (ConsoleHandler): Install the console handler

also for wgnuplot and wgnuplot_pipes. Avoids segfaults when closing

the wgnuplot_pipes console window or the caca terminal console window.

2017-08-31 Martin Saturka <[email protected]>

* src/mousecmn.h src/mouse.c: Bind the < and > keys to change the

current azimuth setting while mousing 3D plots.

(EAM) add an internal flag "Opt-" so that you can bind a hotkey for

which the Alt and Ctrl modifiers are optional rather than required.

2017-08-28 Bastian Maerkisch <[email protected]>

* config/mingw/Makefile: Fix target name of generated dependencies

for pipe and console targets.

2017-08-24 Ethan A Merritt <[email protected]>

* src/axis.c src/axis.h src/graphics.c src/interpol.c src/plot2d.c

src/plot3d.c: Revise macro name STORE_WITH_LOG_AND_UPDATE_RANGE to

STORE_AND_UPDATE_RANGE since we no longer handle log scaling at the

time data is stored. Take this opportunity to remove an unused

parameter (OUT_ACTION) from the macro. Go back to using the same

macro for the COLOR_AXIS that we use for all other axes.

This is intended solely to make the code easier to understand;

there is no change in the code actually executed.

2017-08-23 Ethan A Merritt <[email protected]>

* src/plot2d.c (parametric_fixup): Consolidate redundant code blocks

handling the polar/cartesian paths through parametric function handling.

* src/plot2d.c (store2d_point): Consolidate identical case statements

for BOXPLOT, BOXES.

2017-08-22 Ethan A Merritt <[email protected]>

* src/grahics.c src/graphics.h (rgbscale) demo/image.dem:

Since cbrange is now decoupled from rgbimage, the image and image2 demos

need to change accordingly. Add a placeholder macro rgbscale(colorval)

that for now only enforces that color components are in [0:255] but

can later be replaced with an actual scaling routine.

2017-08-18 Ethan A Merritt <[email protected]>

* src/graphics.c (process_image): Limit alpha channel range to [0:255]

in "with rgbalpha pixels".

* src/axis.c src/datafile.c src/plot2d.c src/plot3d.c src/graphics.c

demo/sampling.dem docs/gnuplot.doc:

Allow explicit sampling interval in the range statements associated with

pseudofile '++' in both 2D and 3D. Example:

plot sample range [u=0:127][v=0:127] '++' using 1:2:(F(u,v)) with image

* src/tabulate.c: Handle splot with rgbimage, rgbalpha

2017-08-17 Dima Kogan <[email protected]>

* src/plot2d.c src/plot3d.c src/graphics.c (process_image):

Do not apply cbrange to rgbimage data. Do not use rgbimage range to

autoscale cbrange. For now this means that rgbimage color components

must be in the range [0:255], as they are for png, jpeg, etc. Later

we may add an autoscaling option for user-supplied color values.

* term/x11.trm src/qtterminal/qt_term.cpp:

If the outboard driver cannot be started, point the user to

environmental variable GNUPLOT_DRIVER_DIR.

2017-08-16 Ethan A Merritt <[email protected]>

* src/datafile.c (df_open): Expand leading ~ in filename for binary data

files just as for text files.

* src/plot2d.c src/graph3d.c src/wxterminal/gp_cairo.c: Add harmless

initializations to silence compiler warnings.

2017-08-15 Bastian Maerkisch <[email protected]>

* src/msvc/Makefile: Eliminate the separate wrapper script for builds of

console mode gnuplot by passing the file appropriate extensions as

arguments to the script.

* src/win/wgraph.c src/win/wgdiplus.cpp: We intend to scale line widths

with resolution when printing, but we got that wrong due to confusion of

constants.

* src/win/wgraph.c (CopyPrint): Fix fallback from D2D to GDI+ for

printing.

2017-08-12 Bastian Maerkisch <[email protected]>

* config/mingw/Makefile: "Recursive make considered harmful". Up

until now we tried to reduce the number of rules by using recursive

make for the three different targets "windows", "pipes" and "console".

That broke parallel builds of the "all" target because of multiple

attempts to build the same file due to insufficient dependency rules.

Instead of fixing this, we now follow the same concept as the

MSVC and OpenWatcom Makefiles and implement three set of rules and

avoid recursive make altogether. This also allows us to implement

separate automatic dependency rules. gnuplot scripts are now always

executed using console mode gnuplot in order to see their output.

* config/config.oww: Update to version 5.3. In particular enable

boxed text and external functions and disable bitmap terminals by

default.

2017-08-11 Ethan A Merritt <[email protected]>

* src/parse.c (check_for_iteration): If some depth of a nested

iteration evaluates to an empty range, the evaluated limits of depths

below it are irrelevant and possibly invalid. Add a test to skip

evaluation at lower depthes in such a case.

Bug #1952

2017-08-10 Bastian Maerkisch <[email protected]>

* config/msvc/Makefile: Handle empty lines in cl wrapper script.

jom dislikes changing the directory in a rule twice, so spawn

a subshell when required. Automatically generate timestamp.h for

development builds.

2017-08-08 Ethan A Merritt <[email protected]>

* src/command.c src/parse.c src/plot2d.c demo/iterate.dem:

Revise recursive iteration algorithm to address problems with empty

ranges in a nested iteration. Add support for dynamic reevaluation of

the string in nested ranges using "for [s in <string-expression>]".

Bug #1952

2017-08-09 Bastian Maerkisch <[email protected]>

* config/msvc/Makefile: Automatically generate dependency rules.

Disabled by default since it slows down compilation. Enable with

DEPEND=1.

Patch #756

* config/msvc/Makefile: Improve compatibility with jom, the parallel

nmake like build utility, by adding a space after every backslash at

an end of line. Otherwise this would be treated as line continuation.

* config/msvc/Makefile (zip): Distinguish 32/64 bit builds.

2017-08-07 Ethan A Merritt <[email protected]>

* src/plot2d.c src/plot3d.c: Revert inadvertent change of 2017-03-31

that failed to call update_gpval_variables in "set table" mode.

Bug #1954

2017-08-07 Martin Beranek

* term/metapost.trm: Support for user-defined dashtypes.

2017-08-06 Bastian Maerkisch <[email protected]>

* src/stdfn.c|h src/win/wtext.c (ms_snprintf, ms_vsnprintf):

Starting with MSVC 2015 snprintf is finally C99 compliant.

2017-08-05 Ethan A Merritt <[email protected]>

* src/graph3d.c: "set key fixed" should be ignored in the case of

"set view map".

2017-08-05 Bastian Maerkisch <[email protected]>

* src/set.c (set_table): Implement "append" option for datablocks.

Bug #1951

* src/win/wd2d.cpp (d2dCreatePatternBrush): Scale pattern with

desktop DPI if not using a D2D 1.1 DeviceContext.

2017-08-04 Ethan A Merritt <[email protected]>

* src/plot3d.c: Update FIXMEs, comments, remove typos, add

initialization to avoid compiler warning (false positive).

2017-08-04 Hans-Bernhard Broeker <[email protected]>