[MacPorts] #38012: libsdl_image 1.2.12: fails to load some .png images

[MacPorts]

#38012: libsdl_image 1.2.12: fails to load some .png images
-----------------------------+--------------------------------
 Reporter:  michael.klein@…  |      Owner:  macports-tickets@…
     Type:  defect           |     Status:  new
 Priority:  Normal           |  Milestone:
Component:  ports            |    Version:  2.1.3
 Keywords:                   |       Port:  libsdl_image
-----------------------------+--------------------------------
 Trying to run circuslinux on Leopard (PPC):

 {{{
 $ circuslinux

 Error: I couldn't load a graphics file:
 /opt/local/share/circuslinux/data/images/title/programming.png
 The Simple DirectMedia error that occured was:
 Unknown bits_per_pixel u
 }}}

 The error is returned from {{{IMG_Load}}} and can be reproduced with just
 few lines of C:

 {{{
 #include <SDL_error.h>
 #include <SDL_image.h>
 #include <stdio.h>

 int SDL_main(int argc, char *argv[])
 {
     char **p;
     for (p = argv+1; *p; p++)
     {
         printf("%s -> %p, %s\n", *p, IMG_Load(*p), SDL_GetError());
         SDL_ClearError();
     }
     return 0;
 }
 }}}

 {{{
 $ cc `pkg-config --cflags SDL_image`  `pkg-config --libs SDL_image`
 imgload.c   -o imgload
 }}}

 Some images from circuslinux load ok, some don't:

 {{{
 $ ./imgload /opt/local/share/circuslinux/data/images/title/*
 /opt/local/share/circuslinux/data/images/title/graphics.png -> 0x0,
 Unknown bits_per_pixel u
 /opt/local/share/circuslinux/data/images/title/light-off.png -> 0x250790,
 /opt/local/share/circuslinux/data/images/title/light-on.png -> 0x250910,
 /opt/local/share/circuslinux/data/images/title/music.png -> 0x0, Unknown
 bits_per_pixel u
 /opt/local/share/circuslinux/data/images/title/programming.png -> 0x0,
 Unknown bits_per_pixel u
 /opt/local/share/circuslinux/data/images/title/title-highlights.png ->
 0x250800,
 /opt/local/share/circuslinux/data/images/title/title.png -> 0x251630,
 }}}

 The "Unknown bits_per_pixel" error comes from IMG_ImageIO.m.

 As a workaround I disabled ImageIO support in libsdl_image, all files load
 ok now.

-- 
Ticket URL: <https://trac.macports.org/ticket/38012>
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