Using libchafa, glib/galloca.h: No such file or directory

[agent725]

Hello! It has been 10 years ago that I last was making stuff in BaCon. In the meantime I see there's been a lot of great developments.

While compiling I ran into a problem:
Compiling 'chafa_test.bac'... cc  -c chafa_test.bac.c
/usr/include/glib-2.0/glib.h:30:10: fatal error: glib/galloca.h: No such file or directory

INFO: see full error report (y/[n])? y
In file included from chafa_test.bac.generic.h:3,
                from chafa_test.bac.h:2,
                from chafa_test.bac.c:2:
/usr/include/glib-2.0/glib.h:30:10: fatal error: glib/galloca.h: No such file or directory


What I'm trying to do is use libchafa in BaCon. Glib 2.0 libraries and Chafa are all complete on my system. Also the file galloca.h is present, but for some reason not found when compiling. However, I may be doing something wrong?

This is my code:

' sudo apt install libchafa-dev libglib2.0-dev

PRAGMA LDFLAGS `pkg-config --cflags chafa glib-2.0`
PRAGMA LDFLAGS `pkg-config --libs chafa glib-2.0`

PRAGMA INCLUDE <glib-2.0/glib.h>
PRAGMA INCLUDE <chafa/chafa.h>

'PROTO chafa_symbol_map_new, chafa_symbol_map_add_by_tags, chafa_canvas_config_set_geometry, chafa_canvas_config_set_symbol_map, chafa_canvas_draw_all_pixels, chafa_canvas_build_ansi
PROTO chafa_canvas_config_new

config = chafa_canvas_config_new()

PRINT config


Do you know what I may be missing here?

[agent725]

Have gotten a bit further (maybe...):
./chafa_test.bac.string.h ./chafa_test.bac.lex.c ./chafa_test.bac.functions.h ./chafa_test.bac.c ./chafa_test.bac.lex ./chafa_test.bac.generic.h ./chafa_test.bac.log ./chafa_test.bac.h ./chafa_test.bac.lex.exe ./chafa_test.bac.float.h
Do you want to delete them ([y]/n)?
Temporary files were deleted.
Converting 'chafa_test.bac'... done, 24 lines were processed in 0.000 seconds.
Creating lexical analyzer... done.
Compiling 'chafa_test.bac'... cc  `pkg-config --cflags chafa glib-2.0` -c chafa_test.bac.c
/usr/include/chafa/chafa-version-macros.h:112:2: error: #error "CHAFA_VERSION_MIN_REQUIRED must be >= CHAFA_VERSION_1_0"

INFO: see full error report (y/[n])? y
In file included from /usr/include/chafa/chafa.h:29,
                from chafa_test.bac.generic.h:4,
                from chafa_test.bac.h:2,
                from chafa_test.bac.c:2:
/usr/include/chafa/chafa-version-macros.h:112:2: error: #error "CHAFA_VERSION_MIN_REQUIRED must be >= CHAFA_VERSION_1_0"
 112 | #error "CHAFA_VERSION_MIN_REQUIRED must be >= CHAFA_VERSION_1_0"
     |  ^~~~~
chafa_test.bac: In function 'main':
chafa_test.bac:23:35: warning: character constant too long for its type
  23 | PRINT 'Done.'
     |                                   ^
make: *** [Makefile.bacon:6: chafa_test.bac.o] Error 1


My code is now:

' sudo apt install libchafa-dev libglib2.0-dev

PRAGMA LDFLAGS `pkg-config --libs chafa glib-2.0`
PRAGMA OPTIONS `pkg-config --cflags chafa glib-2.0`

PRAGMA INCLUDE <glib-2.0/glib.h>
PRAGMA INCLUDE <chafa/chafa.h>


'PROTO chafa_symbol_map_new, chafa_symbol_map_add_by_tags, chafa_canvas_config_set_geometry, chafa_canvas_config_set_symbol_map, chafa_canvas_draw_all_pixels, chafa_canvas_build_ansi
PROTO chafa_canvas_config_new

config = chafa_canvas_config_new()

PRINT config
PRINT 'Done.'



I'm using the following for reference: hpjansson.org/chafa/ref/chafa-using.html

[Pjot]

Hi agent725,

Those pesky Chafa version macro's are spoiling your compilation. I could make it work by setting the MAJOR and MINOR version manually.

' sudo apt install libchafa-dev libglib2.0-dev

PRAGMA OPTIONS -DCHAFA_MAJOR_VERSION=1 -DCHAFA_MINOR_VERSION=2 `pkg-config --cflags chafa`
PRAGMA LDFLAGS `pkg-config --libs chafa`

PRAGMA INCLUDE <glib-2.0/glib.h>
PRAGMA INCLUDE <chafa/chafa.h>

'PROTO chafa_symbol_map_new, chafa_symbol_map_add_by_tags, chafa_canvas_config_set_geometry, chafa_canvas_config_set_symbol_map, chafa_canvas_draw_all_pixels, chafa_canvas_build_ansi
PROTO chafa_canvas_config_new

config = chafa_canvas_config_new()

PRINT config
PRINT "Done."


Not sure why the problem happens, it might be some glitch in the packaged version of chafa. I have seen such problems before in the Ubuntu repos with libXaw3D for example. Anyway, hope you can proceed now

BR
Peter

[agent725]

Thank you so much! Works like a charm. I'm going to try to produce a little example using Chafa, which is a way to produce pretty images from UTF-8 characters on the command-line.

[Pjot]

Great! I am curious to see it

BR
Peter

[agent725]

Getting further. However, I've got to admit the pointers thing has me challenged.

Right now I can produce some kind of output with the library, however, the result is most likely a pointer to the real result data, and I don't know how to get to that.

To get this far I have declared a variety of weird types that the library needs, and honestly don't quite know how this works yet.


' Get needed packages: sudo apt install libchafa-dev libglib2.0-dev

PRAGMA OPTIONS -DCHAFA_MAJOR_VERSION=1 -DCHAFA_MINOR_VERSION=2 `pkg-config --cflags chafa`
PRAGMA LDFLAGS `pkg-config --libs chafa`

PRAGMA INCLUDE <glib-2.0/glib.h>
PRAGMA INCLUDE <chafa/chafa.h>


PROTO chafa_symbol_map_new
PROTO chafa_symbol_map_add_by_tags
PROTO chafa_canvas_config_new
PROTO chafa_canvas_config_set_geometry
PROTO chafa_canvas_config_set_symbol_map
PROTO chafa_canvas_new
PROTO chafa_canvas_draw_all_pixels
PROTO chafa_canvas_build_ansi

' Declares specific to libchafa
DECLARE symbol_map TYPE ChafaSymbolMap *
DECLARE config TYPE ChafaCanvasConfig *
DECLARE canvas TYPE ChafaCanvas *
DECLARE gs TYPE GString *

DECLARE pixels[36] TYPE guint8
FOR x = 0 TO 35
 pixels[x] = 0
NEXT
FOR x = 13 TO 25
 pixels[x] = 255
NEXT

' Specify the symbols we want
symbol_map = chafa_symbol_map_new()
chafa_symbol_map_add_by_tags(symbol_map, CHAFA_SYMBOL_TAG_ALL)

config = chafa_canvas_config_new()
chafa_canvas_config_set_geometry(config, 23, 12)
chafa_canvas_config_set_symbol_map(config, symbol_map)

canvas = chafa_canvas_new(config)

' Draw pixels and build ANSI string
PIX_WIDTH = 4
PIX_HEIGHT = 2
N_CHANNELS = 4

chafa_canvas_draw_all_pixels(canvas, CHAFA_PIXEL_RGBA8_UNASSOCIATED, pixels, PIX_WIDTH, PIX_HEIGHT, PIX_WIDTH * N_CHANNELS)
result = chafa_canvas_build_ansi (canvas)

PRINT result


[Pjot]

Hi agent725,

I am following the example at hpjansson.org/chafa/ref/chafa-using.html.

You can print struct members using the '->' construction also in BaCon, but you have to specify the type.

So this works for me:

' Get needed packages: sudo apt install libchafa-dev libglib2.0-dev

PRAGMA OPTIONS -DCHAFA_MAJOR_VERSION=1 -DCHAFA_MINOR_VERSION=2 `pkg-config --cflags chafa`
PRAGMA LDFLAGS `pkg-config --libs chafa`

PRAGMA INCLUDE <glib-2.0/glib.h>
PRAGMA INCLUDE <chafa/chafa.h>

PROTO chafa_symbol_map_new
PROTO chafa_symbol_map_add_by_tags
PROTO chafa_canvas_config_new
PROTO chafa_canvas_config_set_geometry
PROTO chafa_canvas_config_set_symbol_map
PROTO chafa_canvas_new
PROTO chafa_canvas_draw_all_pixels
PROTO chafa_canvas_build_ansi

CONST PIX_WIDTH = 3
CONST PIX_HEIGHT = 3
CONST N_CHANNELS = 4

' Declares specific to libchafa
DECLARE symbol_map TYPE ChafaSymbolMap*
DECLARE config TYPE ChafaCanvasConfig*
DECLARE canvas TYPE ChafaCanvas*
DECLARE gs TYPE GString*

DECLARE pixels[PIX_WIDTH * PIX_HEIGHT * N_CHANNELS] = \
   { \
       0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff, \
       0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, \
       0xff, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff \
   } TYPE guint8

' Specify the symbols we want
symbol_map = chafa_symbol_map_new()
chafa_symbol_map_add_by_tags(symbol_map, CHAFA_SYMBOL_TAG_ALL)

config = chafa_canvas_config_new()
chafa_canvas_config_set_geometry(config, 23, 12)
chafa_canvas_config_set_symbol_map(config, symbol_map)

canvas = chafa_canvas_new(config)

chafa_canvas_draw_all_pixels(canvas, CHAFA_PIXEL_RGBA8_UNASSOCIATED, pixels, PIX_WIDTH, PIX_HEIGHT, PIX_WIDTH * N_CHANNELS)
gs = chafa_canvas_build_ansi(canvas)

PRINT gs->str FORMAT "%s\n"

HTH
Peter

Attachments: