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Author: theagentd (posted 2016-04-14 02:16:17, viewed 597 times)

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package engine.age.objects.cmd.glcmd;

import static org.lwjgl.system.MemoryUtil.*;

import java.nio.ByteBuffer;

import static org.lwjgl.system.MemoryStack.*;


import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.opengl.GL12.*;
import static org.lwjgl.opengl.GL13.*;
import static org.lwjgl.opengl.GL14.*;
import static org.lwjgl.opengl.GL15.*;
import static org.lwjgl.opengl.GL20.*;
import static org.lwjgl.opengl.GL21.*;
import static org.lwjgl.opengl.GL30.*;
import static org.lwjgl.opengl.GL31.*;
import static org.lwjgl.opengl.GL32.*;
import static org.lwjgl.opengl.GL33.*;

@SuppressWarnings("unused")
public class CmdClearBuffer {

    public static final int TYPE_INT = 0;
    public static final int TYPE_UINT = 1;
    public static final int TYPE_FLOAT = 2;
    public static final int TYPE_FLOAT_INT = 3;


    public static final int COMMAND_ID = 1;

    public static final int SIZE = 32;

    private static final int TYPE_OFFSET = 4;
    private static final int BUFFER_OFFSET = 8;
    private static final int DRAWBUFFER_OFFSET = 12;
    private static final int V0_OFFSET = 16;
    private static final int V1_OFFSET = 20;
    private static final int V2_OFFSET = 24;
    private static final int V3_OFFSET = 28;


    private CmdClearBuffer() {}


    public static long store(long address, int type, int buffer, int drawbuffer, int v0, int v1, int v2, int v3) {
        memPutInt(address, COMMAND_ID);
        memPutInt(address + TYPE_OFFSET, type);
        memPutInt(address + BUFFER_OFFSET, buffer);
        memPutInt(address + DRAWBUFFER_OFFSET, drawbuffer);
        memPutInt(address + V0_OFFSET, v0);
        memPutInt(address + V1_OFFSET, v1);
        memPutInt(address + V2_OFFSET, v2);
        memPutInt(address + V3_OFFSET, v3);
        return address + SIZE;
    }

    public static long execute(long address) {
        int type = memGetInt(address + TYPE_OFFSET);
        int buffer = memGetInt(address + BUFFER_OFFSET);
        int drawbuffer = memGetInt(address + DRAWBUFFER_OFFSET);
        int v0 = memGetInt(address + V0_OFFSET);
        int v1 = memGetInt(address + V1_OFFSET);
        int v2 = memGetInt(address + V2_OFFSET);
        int v3 = memGetInt(address + V3_OFFSET);

        execute(type, buffer, drawbuffer, v0, v1, v2, v3);

        return address + SIZE;
    }


    public static void execute(int type, int buffer, int drawbuffer, int v0, int v1, int v2, int v3) {
       
       ByteBuffer values = stackMalloc(16);
       values.putInt(0, v0);
       values.putInt(4, v1);
       values.putInt(8, v2);
       values.putInt(12, v3);
       
      switch(type){
         case TYPE_INT: glClearBufferiv(buffer, drawbuffer, values); break;
         case TYPE_UINT: glClearBufferuiv(buffer, drawbuffer, values); break;
         case TYPE_FLOAT: glClearBufferfv(buffer, drawbuffer, values); break;
         case TYPE_FLOAT_INT: glClearBufferfi(buffer, drawbuffer, values.getFloat(0), values.getInt(4)); break;
      }
    }
}





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