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 int ntick();

    32 

    33     public static boolean tick(){

    34 	return (1 == ntick());

    35     }

    36 

    37     public static native void nstep(int keymask);

    38 

    39     public static void step(int keymask){

    40 	if (-1 == keymask) {step();}

    41 	else {nstep(keymask);}}

    42 

    43     public static native void shutdown();

    44 

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

    46 

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

    48 

    49     public static final int MAX_SAVE_SIZE = 20000;

    50 

    51     public static ByteBuffer createDirectByteBuffer(int capacity){

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

    53 	ByteBuffer buf = 

    54 	    ByteBuffer.allocateDirect(capacity)

    55 	              .order(ByteOrder.nativeOrder());

    56 	buf.put(zeros);

    57 	buf.clear();

    58 	return buf;

    59     }

    60 

    61     public static ByteBuffer saveBuffer(){

    62 	return createDirectByteBuffer(MAX_SAVE_SIZE);

    63     }

    64 

    65     public static ByteBuffer saveState(){

    66 	ByteBuffer buf = saveBuffer();

    67 	

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

    69 	

    70 	// determine the extent of the saved data

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

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

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

    74 		position = i;

    75 		break;

    76 	    }}

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

    78 	ByteBuffer save = createDirectByteBuffer(position);

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

    80 	save.put(saveArray);

    81 	save.rewind();

    82 	return save;

    83     }

    84 

    85     public static void loadState(ByteBuffer saveState){

    86 	loadState(saveState, MAX_SAVE_SIZE);

    87     }

    88 

    89     public static native int getROMSize();

    90     public static native int getRAMSize();

    91     

    92 

    93     public static final int WRAM_SIZE = 0x8000;

    94 

    95     public static final int VRAM_SIZE = 0x4000;

    96 

    97     public static final int NUM_REGISTERS = 27;

    98 

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

   100 

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

   102 

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

   104 

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

   106     

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

   108 }
author	Robert McIntyre <rlm@mit.edu>
date	Sun, 11 Mar 2012 19:07:31 -0500
parents	95cb2152d7cd
children	4c60ebca1a9d