Ndtyjky

I'm working re-spriting this android game and the sprites are all in one file called gt, this is the code from the apk that converts what I assume is the byte code file into actual images.

It takes one parameter which is the path to that file.

Java isn't really my language so I was hoping someone could help me figure out what this code is doing and how I can use it to convert the file into something that I can edit like a png.

This is the corresponding source code:

    public static void readGraphicsTable(String paramString)

{

    InputStream localInputStream = Util.getResourceAsStream(paramString);

    if (localInputStream == null)

    {

    HG.logWarning("Config file not found: " + paramString);

    return;

    }

    int j;

    int k;

    for (;;)

    {

    try

    {

        paramString = new DataInputStream(localInputStream);

        j = paramString.readShort();

        k = paramString.readShort();

        if ((j != 18260) && (k != 1281))

        {

        try

        {

            localInputStream.close();

            return;

        }

        catch (Throwable paramString)

        {

            return;

        }

        createFontOffsets();

        }

    }

    catch (Throwable paramString)

    {

        label156:

        paramString = paramString;

        HG.handleError(paramString, "Gfx.readGraphicsTable()");

        try

        {

        localInputStream.close();

        return;

        }

        catch (Throwable paramString)

        {

        return;

        }

        k = paramString.readShort();

        colors = new int[k];

        j = 0;

        if (j >= k) {

        continue;

        }

        colors[j] = paramString.readInt();

        j += 1;

        continue;

        k = paramString.readShort();

        fonts = new Font[k];

        fontOffsets = (int)Array.newInstance(Integer.TYPE, new int { k, 4 });

        j = 0;

        if (j >= k) {

        continue;

        }

        m = paramString.readByte();

        if (m != -1) {

        continue;

        }

        fonts[j] = Font.getDefaultFont();

        fontOffsets[j][0] = paramString.readByte();

        fontOffsets[j][1] = paramString.readByte();

        fontOffsets[j][2] = paramString.readByte();

        fontOffsets[j][3] = paramString.readByte();

        j += 1;

        continue;

        fonts[j] = Font.getFont(m & 0x60, m & 0x7, m & 0x18);

        continue;

    }

    finally {}

    j = paramString.readShort();

    if (j == -1) {

        break label1144;

    }

    k = paramString.readShort();

    switch (j)

    {

    case 17231: 

        paramString.skip(k);

    }

    }

    for (;;)

    {

    int m;

    try

    {

        localInputStream.close();

        throw paramString;

        k = paramString.readShort();

        imageTable = new short[k + 4];

        images = new Image[k + 4];

        j = 0;

        if (j < k)

        {

        m = (short)paramString.readByte();

        if (m == -1) {

            break label1160;

        }

        arrayOfShort = imageTable;

        arrayOfShort1 = new short[12];

        arrayOfShort[j] = arrayOfShort1;

        m = (short)(m << 8);

        if ((m & 0x200) != 0)

        {

            int i = paramString.readShort();

            System.arraycopy(imageTable[i], 0, arrayOfShort1, 0, arrayOfShort1.length);

            arrayOfShort1[7] = ((short)(arrayOfShort1[7] | m));

            arrayOfShort1[10] = i;

            break label1160;

        }

        n = paramString.readByte();

        int i1 = paramString.readByte();

        arrayOfShort1[7] = ((short)(m | n));

        arrayOfShort1[2] = ((short)(i1 >> 4 & 0xF));

        arrayOfShort1[3] = ((short)(i1 >> 0 & 0xF));

        arrayOfShort1[4] = ((short)paramString.readByte());

        arrayOfShort1[5] = paramString.readShort();

        arrayOfShort1[6] = paramString.readShort();

        arrayOfShort1[8] = paramString.readShort();

        paramString.readUTF();

        if ((m & 0x100) == 0) {

            break label1160;

        }

        arrayOfShort1[10] = paramString.readShort();

        arrayOfShort1[11] = ((short)paramString.readByte());

        break label1160;

        }

        short arrayOfShort = imageTable;

        short arrayOfShort1 = new short[12];

        arrayOfShort['?'] = arrayOfShort1;

        arrayOfShort1[7] = 0;

        arrayOfShort1[10] = 0;

        arrayOfShort1[2] = 1;

        arrayOfShort1[3] = 1;

        arrayOfShort1[4] = 3;

        arrayOfShort1[5] = 0;

        arrayOfShort1[6] = 0;

        arrayOfShort1[8] = 0;

        arrayOfShort = imageTable;

        arrayOfShort1 = new short[12];

        arrayOfShort['?'] = arrayOfShort1;

        arrayOfShort1[7] = 0;

        arrayOfShort1[10] = 0;

        arrayOfShort1[2] = 1;

        arrayOfShort1[3] = 1;

        arrayOfShort1[4] = 3;

        arrayOfShort1[5] = 0;

        arrayOfShort1[6] = 0;

        arrayOfShort1[8] = 0;

        arrayOfShort = imageTable;

        arrayOfShort1 = new short[12];

        arrayOfShort['?'] = arrayOfShort1;

        arrayOfShort1[7] = 0;

        arrayOfShort1[10] = 0;

        arrayOfShort1[2] = 4;

        arrayOfShort1[3] = 1;

        arrayOfShort1[4] = 3;

        arrayOfShort1[5] = 0;

        arrayOfShort1[6] = 0;

        arrayOfShort1[8] = 0;

        arrayOfShort = imageTable;

        arrayOfShort1 = new short[12];

        arrayOfShort['?'] = arrayOfShort1;

        arrayOfShort1[7] = 0;

        arrayOfShort1[10] = 0;

        arrayOfShort1[2] = 1;

        arrayOfShort1[3] = 1;

        arrayOfShort1[4] = 3;

        arrayOfShort1[5] = 0;

        arrayOfShort1[6] = 0;

        arrayOfShort1[8] = 0;

        break;

        k = paramString.readShort();

        frameTable = new short[k * 7];

        j = 0;

        break label1167;

        frameTable[(m + 2)] = ((short)paramString.readUnsignedByte());

        frameTable[(m + 3)] = ((short)paramString.readUnsignedByte());

        frameTable[(m + 0)] = ((short)paramString.readUnsignedByte());

        frameTable[(m + 1)] = ((short)paramString.readUnsignedByte());

        frameTable[(m + 4)] = ((short)paramString.readByte());

        frameTable[(m + 5)] = ((short)paramString.readByte());

        frameTable[(m + 6)] = ((short)paramString.readByte());

        break label1208;

        frameTable[(m + 2)] = paramString.readShort();

        frameTable[(m + 3)] = paramString.readShort();

        frameTable[(m + 0)] = paramString.readShort();

        frameTable[(m + 1)] = paramString.readShort();

        frameTable[(m + 4)] = paramString.readShort();

        frameTable[(m + 5)] = paramString.readShort();

        frameTable[(m + 6)] = ((short)paramString.readByte());

        break label1208;

        m = paramString.readShort();

        animationTable = new short[m];

        j = 0;

        if (j >= m) {

        break;

        }

        int n = paramString.readShort();

        arrayOfShort = animationTable;

        arrayOfShort1 = new short[n + 2];

        arrayOfShort[j] = arrayOfShort1;

        k = 0;

        if (k >= n + 2) {

        break label1215;

        }

        arrayOfShort1[k] = paramString.readShort();

        k += 1;

        continue;

        paramString.skip(k);

        break;

        try

        {

        label1144:

        localInputStream.close();

        return;

        }

        catch (Throwable paramString)

        {

        return;

        }

    }

    catch (Throwable localThrowable)

    {

        continue;

    }

    break label156;

    label1160:

    j += 1;

    continue;

    label1167:

    while (j < k)

    {

        m = j * 7;

        switch (8)

        {

        }

        label1208:

        j += 1;

    }

    break;

    label1215:

    j += 1;

    }

}