bug#45140: 28.0.50; rendering c source on the tty inside virtual console

[rrandresf]

Hi. Guys.

On emacs 27.1 emacs on the tty renders pretty fine.

tty3-screenshot-27.1.png
Description: 27.1

On emacs 28.0.50 the colors has changed (read quality was better on 27)

tty4-screenshot-28.0.50.png
Description: 28

Part of source code (Just in case)

// tx_ok set here in case of online; TODO: mark the retry case before calling 
this func
void edi_tracking_bean_check_ticket_status(edi_tracking_bean_t self) {
  inv_company_t company_bean;
  credentials_t credentials;
  buffer_t text_4_template_xml;
  buffer_t text_inc_as_json_data_ptr;
  buffer_t text_out;
  const char *template_name_4_verbosity;
  Err error;
  bool flag; 

  flag = true;
  credentials = (credentials_t)objects_search(self-> app_objects, 
(int)credentials_free);
  company_bean = credentials_get_company_bean(credentials);

  // export_company_data_for_edi_ticket_status
  text_inc_as_json_data_ptr = 
inv_company_short_info_for_getting_ticket_status_to_json(company_bean, 
edi_tracking_bean_get_ticket_number(self));
  if (!text_inc_as_json_data_ptr || (buffer_len(text_inc_as_json_data_ptr) < 
1)) {
    fprintf(stderr, "Err\n edi_tracking_bean_check_ticket_status issue on 
inv_company_short_info_for_getting_ticket_status_to_json %s\n", (const 
char*)buffer_ptr(text_inc_as_json_data_ptr));
    inv_error_bean_set_data_helper(contrErrElectronicInvoicePoliIssue, 
"edi_tracking_bean_check_ticket_status issue on 
inv_company_short_info_for_getting_ticket_status_to_json", &error);
    flag = false;
  }
  
  //get_line_content_template
  template_name_4_verbosity = "electronic_invoice_get_ticket_status";
  text_out = buffer_alloc (DEFAULT_ARRAY_SIZE);
  text_4_template_xml = buffer_alloc( DEFAULT_ARRAY_SIZE );
  
contr_print_get_printer_resource_template_from_database(credentials_get_conn(credentials),
 template_name_4_verbosity, text_4_template_xml, &error);
  if (buffer_len(text_4_template_xml) < 1) {
    fprintf(stderr, "Err\n edi_tracking_bean_check_ticket_status issue on 
contr_print_get_printer_template_from_database %s\n", 
template_name_4_verbosity);
    inv_error_bean_set_data_helper(contrSaleErrPrintingIssue, "printer template 
is not present", &error);
    flag = false;
  }

  if (flag) {
    flag = contr_print_merge((const 
char*)buffer_ptr(text_inc_as_json_data_ptr), (const 
char*)buffer_ptr(text_4_template_xml), template_name_4_verbosity, text_out, 
&error);
    if (flag) {
      edi_tracking_bean_set_post_data_for_ticket_status(self, (const 
char*)buffer_ptr(text_out));
      flag = _edi_tracking_bean_check_ticket_status_helper(self, credentials, 
&error); // send
      if (flag) {
        // if_ok, {printf log.info} {inspect and analyze xml_result -> 
<content> <statusCode>} {0127|0|98|99}
        edi_tracking_bean_set_was_transaction_ok(self);
      }
    }
  }

  buffer_free(text_4_template_xml);
  buffer_free(text_out);
}

Best Regards
ps: Ctrl+Alt+F3 {for going to tty3; and then emacsclient -c -t}


In GNU Emacs 28.0.50 (build 2, armv7l-unknown-linux-gnueabihf, X toolkit, cairo 
version 1.17.3, Xaw3d scroll bars)
 of 2020-12-09 built on sacsa
Windowing system distributor 'The X.Org Foundation', version 11.0.12009000
System Description: Arch Linux ARM

Configured using:
 'configure --prefix=/usr --sysconfdir=/etc --libexecdir=/usr/lib
 --localstatedir=/var --with-x-toolkit=lucid --with-xft --without-gconf
 --without-gsettings --with-modules
 '--program-transform-name=s/^ctags$/ctags.emacs/' --without-pop
 --with-wide-int --with-json=yes 'CFLAGS=-march=armv7-a -mfloat-abi=hard
 -mfpu=vfpv3-d16 -O2 -pipe -fstack-protector-strong -fno-plt'
 CPPFLAGS=-D_FORTIFY_SOURCE=2
 LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now'

Configured features:
XAW3D XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GLIB NOTIFY
INOTIFY ACL GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF ZLIB
TOOLKIT_SCROLL_BARS LUCID X11 XDBE XIM MODULES THREADS LIBSYSTEMD JSON
PDUMPER LCMS2

Important settings:
  value of $LC_COLLATE: C
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs
rfc822 mml easymenu mml-sec epa derived epg epg-config gnus-util rmail
rmail-loaddefs auth-source cl-seq eieio eieio-core cl-macs
eieio-loaddefs password-cache json map text-property-search time-date
subr-x seq byte-opt gv bytecomp byte-compile cconv mm-decode mm-bodies
mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader cl-loaddefs
cl-lib sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils
iso-transl tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel term/x-win x-win term/common-win x-dnd tool-bar
dnd fontset image regexp-opt fringe tabulated-list replace newcomment
text-mode elisp-mode lisp-mode prog-mode register page tab-bar menu-bar
rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core term/tty-colors frame minibuffer cl-generic
cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao
korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech
european ethiopic indian cyrillic chinese composite charscript charprop
case-table epa-hook jka-cmpr-hook help simple abbrev obarray
cl-preloaded nadvice button loaddefs faces cus-face macroexp files
window text-properties overlay sha1 md5 base64 format env code-pages
mule custom widget hashtable-print-readable backquote threads dbusbind
inotify lcms2 dynamic-setting font-render-setting cairo x-toolkit x
multi-tty make-network-process emacs)

Memory information:
((conses 16 52810 10166)
 (symbols 48 7064 1)
 (strings 16 19280 2077)
 (string-bytes 1 614498)
 (vectors 16 12353)
 (vector-slots 8 176032 10074)
 (floats 8 23 43)
 (intervals 40 236 6)
 (buffers 872 10))