Dependencies and Licensing

• the source code of this plugin developed using the 4D Plug-in SDK is licensed under the MIT license.
• the licensing of ghostscript (shared library) is exclusively handled by Artifex Software, Inc.
• the licensing of the binary product of this plugin is subject to the licensing of all its dependencies.

Remarks on 9.21 compilation for ARM

• include stdlib.h in r_strip.c for abs()
• make pl_print_usage conditional in pctop.c

/* output the page */
if (gs_debug_c(':')) {
#ifdef DEBUG
    pl_print_usage(pcli->post_page_closure, "parse done :");
#endif
}

• change JERR_HUFF_CLEN_OVERFLOW to JERR_HUFF_CLEN_OUTOFBOUNDS in jchuff.c. depends
• surpress PNG_ZLIB_VERNUM != ZLIB_VERNUM in pngpriv.h
• include ../../include/freetype/ftadvanc.h in afshaper.c
• disable libpng ARM optimisation _

export CFLAGS="-mmacosx-version-min=11.0"
export CXXFLAGS="-mmacosx-version-min=11.0"
export CPPFLAGS="-mmacosx-version-min=11.0 -DPNG_ARM_NEON_OPT=0"
export LDFLAGS="-mmacosx-version-min=11.0"

4d-plugin-gs

4D implementation of Ghostscript

Build Information

• Notable build flags on Mac

--without-x 
--disable-threading 
--without-libidn
--disable-cups

for later versions (not necessary for 9.21)

--without-tesseract

Note: On Mac, need to make so to build a dylib

https://www.ghostscript.com/doc/9.21/Make.htm#Mac_build

using brew bottle crashed instantly

0   libsystem_pthread.dylib       	0x00007fff6ef855ad pthread_mutex_lock + 0
1   libgs.9.53.dylib              	0x000000012994ec41 gp_monitor_enter + 9
2   libgs.9.53.dylib              	0x0000000129b3dbba gs_lib_ctx_init + 203
3   libgs.9.53.dylib              	0x0000000129b39d33 gs_malloc_init_with_context + 34
4   libgs.9.53.dylib              	0x0000000129c3b6b2 psapi_new_instance + 63
5   com.4D.GS                     	0x000000012983733f GS(PluginBlock*) + 1190
6   com.4D.GS                     	0x0000000129836e89 PluginMain + 17
7   com.4D.GS                     	0x0000000129837670 FourDPackex + 60

Issue (fixed): When 4D Server.app is quit (not when the structure is closed), the following error is systematically raised in the client manager thread.

_pthread_tsd_cleanup
_pthread_exit
pthread_exit
TSExit
YieldToThread
SetThreadState

pthread seems to be used for CUPS; let's disable it.

---

Syntax

error:=GS(options)

Parameter	Type	Description
options	ARRAY TEXT
error	LONGINT

Examples

  //ps2pdf example

$input:=Get 4D folder(Current resources folder)+"How to use Ghostscript.ps"
$output:=System folder(Desktop)+"How to use Ghostscript%2d.pdf"

C_BLOB($in;$out)
ARRAY TEXT($args;10)

$args{1}:="-dNOPAUSE"  //important, we can't interact with the cli
$args{2}:="-dBATCH"
$args{3}:="-dSAFER"
$args{4}:="-dQUIET"

  //output (1 file per page)
$args{5}:="-sDEVICE=pdfwrite"
$args{6}:="-sOutputFile="+Convert path system to POSIX($output)

  //command
$args{7}:="-c"
$args{8}:=".setpdfwrite"

  //input
$args{9}:="-f"
$args{10}:=Convert path system to POSIX($input)

GS ($args)

  //pdf2png example

$input:=Get 4D folder(Current resources folder)+"image - Converting a PDF to PNG - Stack Overflow.pdf"
$output:=System folder(Desktop)+"image - Converting a PDF to PNG - Stack Overflow%2d.png"

C_BLOB($in;$out)
ARRAY TEXT($args;9)

$args{1}:="-dNOPAUSE"  //important, we can't interact with the cli
$args{2}:="-dBATCH"
$args{3}:="-dSAFER"
$args{4}:="-dQUIET"

  //output (1 file per page)
$args{5}:="-sDEVICE=pngalpha"
$args{6}:="-sOutputFile="+Convert path system to POSIX($output)

$args{7}:="-r144"  //for decent quality

  //input
$args{8}:="-f"
$args{9}:=Convert path system to POSIX($input)

GS ($args)