OpenClaw

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mufa

OpenClaw

Posted on: 2019/6/28 19:27 #1

Not too shy to talk

Is it possible for AmigaOS 4 port?

https://github.com/pjasicek/OpenClaw

Hans

Re: OpenClaw

Posted on: 2019/6/29 1:51 #2

Home away from home

@mufa

The dependencies sound manageable:
- SDL2 Libraries (SDL2, SDL_Image, SDL_TTF, SDL_Mixer, SDL2_Gfx) for graphics, input, font and audio
- Box2D Library for Physics
- Tinyxml library for data-driven approach

Hans

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Helloworld

Re: OpenClaw

Posted on: 2019/7/3 22:13 #3

Just popping in

We're off to a good start

Captain Claw already has an official AmigaOS appearance in Shogo M.A.D

Resized Image

kas1e

Re: OpenClaw

Posted on: 2019/7/7 11:45 #4

Home away from home

@mufa
Loosing a day and was able to build binary almost with no code changes (just few fixes because of gcc differences and makefiles's compiling/linking things)

Resized Image

I can see also in the game's code big endian ifdefs, so there is chances that after fixing amiga patches and co it may works, but of course we can't be sure that loading of data file big endian aware. Hope to check it a bit later today.

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kas1e

Re: OpenClaw

Posted on: 2019/7/7 14:22 #5

Home away from home

As expected it fail to load data file (CLAW.REZ), which is on 99% probabaly because of endianes.

Game come with some small "libwap" library, which deal with loading of .REZ datafiles, and it just return NULL (meaning invalid data file) when calling WAP_LoadRezArchive(), which is just:


RezArchive* WAP_LoadRezArchive(const char* rezFilePath)

{

    std::ifstream* fileStream = new std::ifstream(rezFilePath, std::ifstream::binary);

    if (!fileStream->is_open())

    {

        return NULL;

    }



    RezArchive* rezArchive = new RezArchive;

    rezArchive->rootDirectory = new RezDirectory;

    // Initialize to default values

    (*rezArchive->rootDirectory) = { 0 };

    rezArchive->rootDirectory->name = StdStringToCharArray(std::string(""));



    // Read rez file header which is 127 bytes long

    fileStream->read(rezArchive->header, 127);

    // Read rez file version

    FileRead(&(rezArchive->version), fileStream, 127);

    // Read rez payload offset (offset of first directory)

    FileRead(&(rezArchive->rootDirectory->offset), fileStream, 131);

    // 

    FileRead(&(rezArchive->rootDirectory->size), fileStream, 135);



    // Checksum, offset to last archive + its node size should == file size

    uint32_t expectedRezArchiveSize = rezArchive->rootDirectory->offset + rezArchive->rootDirectory->size;

    // Get actual size of file we opened

    fileStream->seekg(0, std::ios::end);

    std::streamoff actualLoadedFileSize = fileStream->tellg();

    // If this check fails, we did not load valid REZ file

    if (expectedRezArchiveSize != actualLoadedFileSize)

    {

        WAP_DestroyRezArchive(rezArchive);

        return NULL;

    }



    // Recursively read all directories

    ReadRezDirectory(rezArchive, rezArchive->rootDirectory, fileStream);



    // Register loaded REZ archive file

    RegisterRezArchiveFile(rezArchive, fileStream);



    // Create map of REZ files with key being their full file path

    //START_QUERY_PERFORMANCE_TIMER;

    CreateRezArchiveFileMap(rezArchive);

    //END_QUERY_PERFORMANCE_TIMER;

    return rezArchive;

}

So somewhere in that function it fail (probabaly reading wrongly structures because of endianes), and return NULL.

If anyone can/want to help with rewriting it to big-endian: help will be appreacated. There is relevant source file:

https://github.com/pjasicek/OpenClaw/b ... p/RezArchiveFile.cpp#L602

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kas1e

Re: OpenClaw

Posted on: 2019/7/7 18:30 #6

Home away from home

Asking author about, he says that yeah, big-endian wasn't consider so it is.

I tried to replace in that WAP_LoadRezArchive, that part:


// Read rez file version

    FileRead(&(rezArchive->version), fileStream, 127);

    // Read rez payload offset (offset of first directory)

    FileRead(&(rezArchive->rootDirectory->offset), fileStream, 131);

    // 

    FileRead(&(rezArchive->rootDirectory->size), fileStream, 135);

On that one:


// Read rez file version

    FileRead(&(rezArchive->version), fileStream, 127);

   rezArchive->version = SDL_SwapLE32(rezArchive->version);

    // Read rez payload offset (offset of first directory)

    FileRead(&(rezArchive->rootDirectory->offset), fileStream, 131);

    rezArchive->rootDirectory->offset = SDL_SwapLE32(rezArchive->rootDirectory->offset);

    // 

    FileRead(&(rezArchive->rootDirectory->size), fileStream, 135);

    rezArchive->rootDirectory->size = SDL_SwapLE32(rezArchive->rootDirectory->size);

But it only make it freezes. Probabaly that 127 bytes header need adjustements as well as some other stuff.

Authour through say, that probably what would solve this would be making FileRead and all other reading generics to be endian agnostic. But he don't have any device which has big endian, so there would be no way for him to test it at the moment :(

In other words, someone should help there with big-endian fixes, anyone ?:)

At moment i only find one generic reading function:


template<typename T>

static void FileRead(T* dest, std::ifstream* file, int32_t offset)

{

    file->seekg(offset, std::ios::beg);

    file->read((char*)dest, sizeof(*dest));

}

Not sure how to make it endian agnostic, so help need it.

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thellier

Re: OpenClaw

Posted on: 2019/7/8 7:24 #7

Not too shy to talk

Hello

The whole rezarchive need to be reordered
I whould do a file search containing "rootDirectory" to found the source whith his définition

Aldo the structure is read a part after a part
So must reorder all fields from .version in the 127 bytes range
Then all fields from .offset for 131 bytes
From .size for 135

Etc...