CWE-ou-minkata/Sources/Plasma/PubUtilLib/plClientResMgr/plClientResMgr.cpp

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
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 or by snail mail at:
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*==LICENSE==*/

#include "HeadSpin.h"

#include "hsStream.h"
#include "hsResMgr.h"
#include "plGImage/plJPEG.h"
#include "plGImage/plPNG.h"
#include "plGImage/plMipmap.h"

#include "plClientResMgr.h"


//// Singleton Instance ///////////////////////////////////////////////////////

plClientResMgr& plClientResMgr::Instance(void)
{
    static plClientResMgr theInstance;
    return theInstance;
}

plClientResMgr::~plClientResMgr()
{
    std::map<plString, plMipmap*>::iterator it;

    for (it = ClientResources.begin(); it != ClientResources.end(); ++it) {
        if (it->second)
            it->second->UnRef();
    }
}

void plClientResMgr::ILoadResources(const plFileName& resfile)
{
    if (!resfile.IsValid()) {
        return;
    }

    hsUNIXStream in;

    if (in.Open(resfile, "rb")) {
        uint32_t header = in.ReadLE32();
        uint32_t version = in.ReadLE32();
        uint32_t num_resources = 0;

        switch (version) {
            case 1:
                num_resources = in.ReadLE32();

                for (int i = 0; i < num_resources; i++) {
                    plMipmap* res_data = NULL;
                    uint32_t res_size = 0;
                    plString res_name = in.ReadSafeStringLong();
                    plString res_type = res_name.Substr(res_name.GetSize() - 4, 4);

                    // Version 1 doesn't encode format, so we'll try some simple
                    // extension sniffing
                    if (res_type == ".png") {
                        // Read resource stream size, but the PNG has that info in the header
                        // so it's not needed
                        res_size = in.ReadLE32();
                        res_data = plPNG::Instance().ReadFromStream(&in);
                    } else if (res_type == ".jpg") {
                        // Don't read resource stream size, as plJPEG's reader will need it
                        res_data = plJPEG::Instance().ReadFromStream(&in);
                    } else {
                        // Original Myst5 format only is known to support Targa,
                        // so default fallback is targa
                        // TODO - Add plTarga::ReadFromStream()
                        // for now, just skip the unknown resource and put NULL into the map
                        res_size = in.ReadLE32();
                        in.Skip(res_size);
                    }

                    ClientResources[res_name] = res_data;
                }

                break;
            default:
                break;
        }

        in.Close();
    }
}

plMipmap* plClientResMgr::getResource(const plString& resname)
{
    plMipmap* resmipmap = nullptr;
    std::map<plString, plMipmap*>::iterator it = ClientResources.find(resname);

    if (it != ClientResources.end()) {
        resmipmap = it->second;
    } else {
        hsAssert(resmipmap, "Unknown client resource requested.");
    }

    return resmipmap;
}