Mercurial > vba-clojure

     1 package com.aurellem.gb;

     2 

     3 import java.nio.ByteBuffer;

     4 import java.nio.IntBuffer;

     5 import java.nio.ByteOrder;

     6 

     7 public class Gb {

     8  

     9     

    10     public Gb(){}

    11 

    12 

    13     /** 

    14      * Hello World! This is just to test the native interface.

    15      */

    16     public static native void sayHello();

    17     

    18     /** 

    19      * Run the emulator on a given rom

    20      * @param rom - the name of the rom.

    21      */

    22     public static native void startEmulator(String rom);

    23 

    24     

    25     public static void loadVBA(){

    26 	System.loadLibrary("vba");

    27     }

    28 

    29     public static native void step();

    30 

    31     public static native void step(int keymask);

    32 

    33     public static native void shutdown();

    34 

    35     public static native long saveState(ByteBuffer buffer, int size);

    36 

    37     public static native void loadState(ByteBuffer buffer, int size);

    38 

    39     public static final int MAX_SAVE_SIZE = 20000;

    40 

    41     public static ByteBuffer createDirectByteBuffer(int capacity){

    42 	byte[] zeros = new byte[capacity];

    43 	ByteBuffer buf = 

    44 	    ByteBuffer.allocateDirect(capacity)

    45 	              .order(ByteOrder.nativeOrder());

    46 	buf.put(zeros);

    47 	buf.clear();

    48 	return buf;

    49     }

    50 

    51     public static ByteBuffer saveBuffer(){

    52 	return createDirectByteBuffer(MAX_SAVE_SIZE);

    53     }

    54 

    55     public static ByteBuffer saveState(){

    56 	ByteBuffer buf = saveBuffer();

    57 	

    58 	saveState(buf, buf.capacity());

    59 	

    60 	// determine the extent of the saved data

    61 	int position = buf.capacity() - 1;

    62 	for (int i = position; i > 0; i--){

    63 	    if (0 != buf.get(i)){

    64 		position = i;

    65 		break;

    66 	    }}

    67 	byte[] saveArray = new byte[position];

    68 	ByteBuffer save = createDirectByteBuffer(position);

    69 	buf.get(saveArray, 0 , position);

    70 	save.put(saveArray);

    71 	save.rewind();

    72 	return save;

    73     }

    74 

    75     public static void loadState(ByteBuffer saveState){

    76 	loadState(saveState, MAX_SAVE_SIZE);

    77     }

    78 

    79     public static native int getROMSize();

    80     public static native int getRAMSize();

    81     

    82 

    83     public static final int WRAM_SIZE = 0x8000;

    84 

    85     public static final int VRAM_SIZE = 0x4000;

    86 

    87     public static final int NUM_REGISTERS = 27;

    88 

    89     public static native void getRAM(int[] store);

    90 

    91     public static native void getROM(int[] store);

    92 

    93     public static native void getWRAM(int[] store);

    94 

    95     public static native void getVRAM(int[] store);

    96     

    97     public static native void getRegisters(int[] store);

    98 }
author	Robert McIntyre <rlm@mit.edu>
date	Fri, 09 Mar 2012 13:24:02 -0600
parents	db8e0a563c8e
children	95cb2152d7cd