Buiding PNGTOMR on Mac OSX

[I.M. Weasel]

I'm trying to build pngtomr from the logotools package on Mac OS X 106.8. (http://www.libpng.org/pub/png/libpng.html)

It requires libpng as a library (png.h). There is a version on fink for Mac OSX 10.6.8 (1.6.10-1) but I can't install fink becuase the version im trying to install (10.6.8 appropriate) keeps timing out or not being able to connect to mirrors during the install.

There is a version (1.2.41 )of libpng in /usr/X11/include/, but it is just not happy with it. And ive also installed libpng 1.0.8, and it is also producing the same errors:

Trying to build pngtomr via gcc just results in every function it trys to call from the library being an 'undefined symbol'. (small tidbit below).

Undefined symbols:
...
...
"_png_set_background", referenced from:
      _read_png in ccZtjJCH.o
ld: symbol(s) not found
collect2: ld returned 1 exit status

What is going wrong?

[|darc|]

It fails using libpng 1.6.37 from Homebrew as well, but the error message is different.

AndrewK's logotools is like 18 years old now. No one else has made an open source mr converter?

[I.M. Weasel]

The only other tools I found were on Sizious' site http://sizious.com/download/dreamcast/ . He has a specific PNG to MR tool, and also that functionality is built in to his Inducer programs as well. However, his/hers PNG to MR tool is written in pascal, and his inducer tool is written in Delphi XE2, 2 languages I have no familiarity with and no compiles (on my Mac 10.6.8 ) for.

[|darc|]

Yeah I saw the same thing and wasn't interested in trying to compile them on my Mac either

[SiZiOUS]

I have a project to make a newer, multiplatform MR-Tool based on the implementation of Seflboot Inducer 5 which is the newer implementation at this time. Sadly, I haven't so much time yet.

[mrneo240]

builds on linux with gcc 8.2 and libpng 1.2

ii  libpng12-0:i386                                             1.2.50-2+deb8u3                    i386         PNG library - runtime
ii  libpng12-dev:i386                                           1.2.50-2+deb8u3                    i386         PNG library - development

heres patch for libpng 1.5x and up (tested on 1.6)

diff -Naur orig/logoinsert.c new/logoinsert.c
--- orig/logoinsert.c	2001-05-09 06:20:09.000000000 -0400
+++ new/logoinsert.c	2019-06-10 10:33:21.681040100 -0400
@@ -26,7 +26,8 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
  */
-
+#include <stdlib.h>
+#include <string.h>
 #include <stdio.h>
 
 int main(int argc, char *argv[])
diff -Naur orig/Makefile new/Makefile
--- orig/Makefile	2001-05-09 06:22:03.000000000 -0400
+++ new/Makefile	2019-06-10 10:17:05.282843400 -0400
@@ -1,5 +1,5 @@
 CC	= gcc
-CFLAGS	= -O3 -mpentiumpro
+CFLAGS	= -O3 -s
 
 .c.o:
 	$(CC) $(CFLAGS) -o $@ -c $<
diff -Naur orig/pngtomr.c new/pngtomr.c
--- orig/pngtomr.c	2001-05-09 06:18:22.000000000 -0400
+++ new/pngtomr.c	2019-06-10 10:28:50.787435400 -0400
@@ -26,7 +26,8 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
  */
-
+#include <stdlib.h>
+#include <string.h>
 #include "png.h"
 
 typedef struct {
@@ -85,7 +86,7 @@
       return 0;
    }
 
-   if (setjmp(png_ptr->jmpbuf))
+   if (setjmp(png_jmpbuf(png_ptr)))
    {
       png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
       fclose(fp);

[I.M. Weasel]

Thanks for chiming in, MrNeo. Im trying to finish up a game im making and will be hopping back into this within a few weeks.

[I.M. Weasel]

how exactly would i 'patch' that file into logotools?

[I.M. Weasel]

That patch makes sense except for the

 typedef struct {
@@ -85,7 +86,7 @@
       return 0;
    }

part.

[I.M. Weasel]

Never mind I figured it all out

[BB Hood]

I recently programmed a GIMP plugin to create MR images. https://gitlab.com/BBHoodsta/makeip [file-mr.py]