cdwfs / img2ktx Goto Github PK

Compressonator allows more customizable compression, including a speed/quality slider and various format-specific tweaks. See which ones are worth exposing.

As I'm about to release a major update, this seems as good a time as any to start tracking what's changed.

• Changes.txt file
• Version info (hooked up to -v)

Motivation:

• ispc_texcomp hasn't been updated in years, including merging some PRs for significant-looking bugfixes. Compressonator is under active development (for now).
• ispc_texcomp requires a fancy custom compiler, which complicates the build process and hinders both distribution and CI/testing. Compressonator can be easily built from source on any platform with a relatively modern C++ compiler.
• Compressonator supports more output formats than ispc_texcomp.

Machine : ubuntu 18.04

[ 33%] Building CXX object CMakeFiles/img2ktx.dir/img2ktx.cpp.o
[ 66%] Building CXX object CMakeFiles/img2ktx.dir/build_version.cpp.o
[100%] Linking CXX executable img2ktx
/usr/bin/ld: cannot find -lIMG2KTX_ISPC_TEXCOMP_LIB-NOTFOUND
collect2: error: ld returned 1 exit status
CMakeFiles/img2ktx.dir/build.make:112: recipe for target 'img2ktx' failed
make[2]: *** [img2ktx] Error 1
CMakeFiles/Makefile2:99: recipe for target 'CMakeFiles/img2ktx.dir/all' failed
make[1]: *** [CMakeFiles/img2ktx.dir/all] Error 2
Makefile:90: recipe for target 'all' failed
make: *** [all] Error 2

Hi,
Is there pre-built binaries for linux?
I do not see in the Releases page (https://github.com/cdwfs/img2ktx/releases)
Thank you.

What do you think about adding functionality for converting .ktx to images, for example .png, to this project?

• What are BC1, BC3, BC7, ETC1, and ASTC?
• What is KTX?
• Is this different for FLIF, FUIF or "PIK by Google"?

I would love it if you released this code under a license so that it could be integrated into other projects without worries. The MIT license would be savory. The image compressor appears to already be MIT, and the STB stuff is public domain.

I use cmake to build the library then run:
./img2ktx -o out.ktx -f BC3 input/not_kitty.png
here's not_kitty.png:
not_kitty.zip

Loaded input/not_kitty.png -- width=32 height=32 comp=3
compressing mip 0 layer 0: width=32 height=32 pitch_x=32 pitch_y=32
AddressSanitizer:DEADLYSIGNAL
=================================================================
==3641==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc 0x0000008c0f2a bp 0x7ffd3a604c00 sp 0x7ffd3a604778 T0)
==3641==The signal is caused by a READ memory access.
==3641==Hint: address points to the zero page.
    #0 0x8c0f29 in _fini (/opt/img2ktx/img2ktx+0x8c0f29)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (/opt/img2ktx/img2ktx+0x8c0f29) in _fini
==3641==ABORTING