[SOLVED] [RVGL] Broken mipmap generation on 18.1020a

[Wichilie]

It appears the addition of .svg support has broken some other texture code. Certain images will cause RVGL to throw an error message:



This error is not present in previous versions.

(For reference, the track used is Luigi's Mansion. The problematic textures are i and j.)

[Huki]

Running the Windows version of RVGL prints in the console:

Code: Select all

libpng error: IDAT: chunk data is too large

for those two textures.

This happens to be a bug in libpng 1.6.32 that is included with the recent RVGL update.
See: https://sourceforge.net/p/libpng/bugs/270/

For now, you can workaround this issue by:
1) Using libpng16-16.dll from the previous RVGL version together with the latest version. (or)
2) Resaving the textures i and j in GIMP so it works with libpng 1.6.32.

EDIT: Here are the fixed textures (resaved in GIMP).
mkds_mansion_textures_fix.zip

[mmudshark]

Thanks Huki

[Wichilie]

This happens to be a bug in libpng 1.6.32 that is included with the recent RVGL update.

Ah, I see.

EDIT: Here are the fixed textures (resaved in GIMP).
mkds_mansion_textures_fix.zip

Thanks! I included them in an update.

[Pyves]

No more issues with Luiji's Mansion on my side after the textures fix.

[SebR]

the bug is back in 18.1110a ...

[Huki]

the bug is back in 18.1110a ...

Make sure you're using the fixed textures (or re-download from RVZ).

[SebR]

with fixed texture it work fine (strainge that i didn't need theme with previous release ? )

[Huki]

with fixed texture it work fine (strainge that i didn't need theme with previous release ? )

Yes, this is because libpng 1.6.32 can't handle those textures. It can be solved by using an older or newer libpng, but it's simpler to just resave the textures. We're using the libpng builds from SDL_image, so the next time we upgrade libpng would be in sync with SDL_image...

For info, the bug only affects PNG files that use a non-standard compression method.