rlm@43: package com.aurellem.gb;
rlm@43: 
rlm@43: import java.nio.ByteBuffer;
rlm@60: import java.nio.IntBuffer;
rlm@56: import java.nio.ByteOrder;
rlm@43: 
rlm@43: public class Gb {
rlm@43:  
rlm@43:     
rlm@43:     public Gb(){}
rlm@43: 
rlm@43: 
rlm@43:     /** 
rlm@43:      * Hello World! This is just to test the native interface.
rlm@43:      */
rlm@48:     public static native void sayHello();
rlm@43:     
rlm@43:     /** 
rlm@43:      * Run the emulator on a given rom
rlm@43:      * @param rom - the name of the rom.
rlm@43:      */
rlm@48:     public static native void startEmulator(String rom);
rlm@48: 
rlm@48:     
rlm@48:     public static void loadVBA(){
rlm@48: 	System.loadLibrary("vba");
rlm@48:     }
rlm@43: 
rlm@53:     public static native void step();
rlm@53: 
rlm@55:     public static native void step(int keymask);
rlm@55: 
rlm@53:     public static native void shutdown();
rlm@50: 
rlm@76:     public static native long saveState(ByteBuffer buffer, int size);
rlm@56: 
rlm@56:     public static native void loadState(ByteBuffer buffer, int size);
rlm@56: 
rlm@76:     public static final int MAX_SAVE_SIZE = 90000;
rlm@56: 
rlm@76:     public static ByteBuffer createDirectByteBuffer(int capacity){
rlm@76: 	byte[] zeros = new byte[capacity];
rlm@56: 	ByteBuffer buf = 
rlm@76: 	    ByteBuffer.allocateDirect(capacity)
rlm@56: 	              .order(ByteOrder.nativeOrder());
rlm@76: 	buf.put(zeros);
rlm@56: 	buf.clear();
rlm@56: 	return buf;
rlm@56:     }
rlm@56: 
rlm@76:     public static ByteBuffer saveBuffer(){
rlm@76: 	return createDirectByteBuffer(MAX_SAVE_SIZE);
rlm@76:     }
rlm@76: 
rlm@76:     public static ByteBuffer saveState(){
rlm@76: 	ByteBuffer buf = saveBuffer();
rlm@76: 	
rlm@76: 	saveState(buf, buf.capacity());
rlm@76: 	
rlm@76: 	// determine the extent of the saved data
rlm@76: 	int position = buf.capacity() - 1;
rlm@76: 	for (int i = position; i > 0; i--){
rlm@76: 	    if (0 != buf.get(i)){
rlm@76: 		position = i;
rlm@76: 		break;
rlm@76: 	    }}
rlm@76: 	System.out.println("Position: " + position);
rlm@76: 	byte[] saveArray = new byte[position];
rlm@76: 	ByteBuffer save = createDirectByteBuffer(position);
rlm@76: 	buf.get(saveArray, 0 , position);
rlm@76: 	save.put(saveArray);
rlm@76: 	save.rewind();
rlm@76: 	return save;
rlm@76:     }
rlm@76: 
rlm@56:     public static void loadState(ByteBuffer saveState){
rlm@76: 	loadState(saveState, MAX_SAVE_SIZE);
rlm@56:     }
rlm@56: 
rlm@59:     public static native int getROMSize();
rlm@59:     public static native int getRAMSize();
rlm@59:     
rlm@59: 
rlm@59:     public static final int WRAM_SIZE = 0x8000;
rlm@59: 
rlm@59:     public static final int VRAM_SIZE = 0x4000;
rlm@59: 
rlm@62:     public static final int NUM_REGISTERS = 27;
rlm@62: 
rlm@60:     public static native void getRAM(int[] store);
rlm@59: 
rlm@60:     public static native void getROM(int[] store);
rlm@59: 
rlm@60:     public static native void getWRAM(int[] store);
rlm@60: 
rlm@60:     public static native void getVRAM(int[] store);
rlm@62:     
rlm@62:     public static native void getRegisters(int[] store);
rlm@43: }