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tex2img's Issues

Failed to Build

Hello, I am having trouble building this module

Information of my environment:

OS: Windows 7 64bit SP1
Python Version: 3.8.5
PIP Version: 20.3.3
Microsoft Visual C++ Version: 15.0

Error log:

    running install
    running build
    running build_ext
    building 'tex2img' extension
    creating build
    creating build\temp.win32-3.8
    creating build\temp.win32-3.8\Release
    creating build\temp.win32-3.8\Release\src
    creating build\temp.win32-3.8\Release\src\basisu
    creating build\temp.win32-3.8\Release\src\basisu\transcoder
    creating build\temp.win32-3.8\Release\src\etcpack
    creating build\temp.win32-3.8\Release\src\pvrtc_decoder
    E:\Microsoft Visual Studio\VC\Tools\MSVC\14.28.29333\bin\HostX86\x86\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -Id:\python\include -Id:\python\include "-IE:\Microsoft Visual Studio\VC\Tools\MSVC\14.28.29333\include" "-IC:\Program Files (x86)\Windows Kits\NETFXSDK\4.6.1\include\um" "-IC:\Program Files (x86)\Windows Kits\10\include\10.0.10240.0\ucrt" /EHsc /Tpsrc\main.cpp /Fobuild\temp.win32-3.8\Release\src\main.obj -std=c++11
    cl : Command line warning D9002 : ignoring unknown option '-std=c++11'
    main.cpp
    C:\Users\User\AppData\Local\Temp\pip-install-e30erjpj\tex2img_836879c5d2fc4641b8a8f99a7ea1cd78\src\basisu\basisu_enc.h(689): error C3861: 'tolower': identifier not found
    src\main.cpp(58): warning C4018: '>=': signed/unsigned mismatch
    src\main.cpp(77): warning C4018: '<': signed/unsigned mismatch
    src\main.cpp(78): warning C4018: '<': signed/unsigned mismatch
    src\main.cpp(114): warning C4018: '>=': signed/unsigned mismatch
    src\main.cpp(119): warning C4018: '>=': signed/unsigned mismatch
    error: command 'E:\\Microsoft Visual Studio\\VC\\Tools\\MSVC\\14.28.29333\\bin\\HostX86\\x86\\cl.exe' failed with exit status 2

Step to reproduce:

  1. Open Command Prompt
  2. Type pip install tex2img

Throw exception instead of silent fail

tex2img/src/main.cpp

Line 185 in 7b1aea9

printf("failed decoding");

On the above referenced line, this would be better to throw an exception like raise ValueError('Failed decoding') instead of printf(). This helps anyone using the library in detecting errors. If you anticipate that users may need the script to still move on and continue processing, perhaps add a boolean argument to the function like ignore_errors=False

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