Image height exceeds user limit in IHDR

[Ataman]

Hiho,

OS: Still Debian Lenny
2.6.26-2-openvz-amd64 #1 SMP Thu Sep 16 16:09:07 UTC 2010 x86_64 GNU/Linux

c10t version:
SNAPSHOT (10:57, 9. Sept 2010)

Our map got bigger, perhaps too big?
After the whole render process, c10t tries to save the map as a png and throws the following error:

done!
Saving image...
libpng warning: Image height exceeds user limit in IHDR
libpng warning: Invalid image height in IHDR
libpng error: Invalid IHDR data
/home/minecraft/bin/c10t: Success

I have no clue about libpng but might that "user limit" be hardcoded in c10t?

Greetings
Ataman

[Ataman]

I tried the same thing again without -r 270 (assuming I would get an error like image width exceeds user limit) but got a little bit different message:
libpng warning: Image width exceeds user limit in IHDR
libpng warning: Invalid image width in IHDR
libpng warning: Width is too large for libpng to process pixels
libpng error: Invalid IHDR data

I suspect PNG's aren't made to be that large, are they?

[Lirum]

Solution:
image.cpp
after: png_init_io(png_ptr, fp);

add: png_set_user_limits(png_ptr, 0x7fffffffL, 0x7fffffffL);

Thanks to .blyzzz from minecraft.de

[evildeeds]

Was this issue closed without any patch to c10t? I cannot find a commit adding a line with png_set_user_limits. I'll reopen this and check. png_init_io is now located at

c10t/src/image/format/png.hpp

Line 69 in 3874582

png_init_io(write_struct, fp);

Edit: I know this is an old issue however "-r" is the number of degrees the rendering is rotated, you should use "-R" to limit how much of the world is rendered but maybe this issue was before "-R" was supported and limited to 1000 chunks?