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package com.sun.opengl.util;
import javax.media.opengl.*;
import javax.media.opengl.util.*;
import com.sun.opengl.impl.*;
import java.nio.*;
public class GLArrayDataWrapper implements GLArrayData {
public static GLArrayDataWrapper createFixed(int index, int comps, int dataType, boolean normalized,
int stride, Buffer buffer,
int vboName, long bufferOffset)
throws GLException
{
GLProfile.isValidateArrayDataType(index, comps, dataType, false, true);
GLArrayDataWrapper adc = new GLArrayDataWrapper();
adc.init(null, index, comps, dataType, normalized, stride, buffer, false,
vboName, bufferOffset);
return adc;
}
public static GLArrayDataWrapper createGLSL(String name, int comps, int dataType, boolean normalized,
int stride, Buffer buffer,
int vboName, long bufferOffset)
throws GLException
{
if(!GLProfile.isGL2ES2()) {
throw new GLException("GLArrayDataServer not supported for profile: "+GLProfile.getProfile());
}
GLProfile.isValidateArrayDataType(-1, comps, dataType, true, true);
GLArrayDataWrapper adc = new GLArrayDataWrapper();
adc.init(name, -1, comps, dataType, normalized, stride, buffer, true,
vboName, bufferOffset);
return adc;
}
//
// Data read access
//
public final boolean isVertexAttribute() { return isVertexAttribute; }
public final int getIndex() { return index; }
public final int getLocation() { return location; }
public final void setLocation(int v) { location = v; }
public final String getName() { return name; }
public final long getOffset() { return vboUsage?bufferOffset:-1; }
public final int getVBOName() { return vboUsage?vboName:-1; }
public final boolean isVBO() { return vboUsage; }
public final Buffer getBuffer() { return buffer; }
public final int getComponentNumber() { return components; }
public final int getComponentType() { return dataType; }
public final int getComponentSize() {
if(clazz==ByteBuffer.class) {
return BufferUtil.SIZEOF_BYTE;
}
if(clazz==ShortBuffer.class) {
return BufferUtil.SIZEOF_SHORT;
}
if(clazz==IntBuffer.class) {
return BufferUtil.SIZEOF_INT;
}
if(clazz==FloatBuffer.class) {
return BufferUtil.SIZEOF_FLOAT;
}
throw new GLException("Given Buffer Class not supported: "+clazz+":\n\t"+this);
}
public final int getElementNumber() {
if(null==buffer) return 0;
return ( buffer.position()==0 ) ? ( buffer.limit() / components ) : ( buffer.position() / components ) ;
}
public final boolean getNormalized() { return normalized; }
public final int getStride() { return stride; }
public final Class getBufferClass() { return clazz; }
public void destroy(GL gl) {
this.buffer = null;
this.components = 0;
this.stride=0;
this.strideB=0;
this.strideL=0;
this.vboName=0;
this.vboUsage=false;
this.bufferOffset=0;
}
public String toString() {
return "GLArrayDataWrapper["+name+
", index "+index+
", location "+location+
", isVertexAttribute "+isVertexAttribute+
", dataType "+dataType+
", bufferClazz "+clazz+
", elements "+getElementNumber()+
", components "+components+
", stride "+stride+"u "+strideB+"b "+strideL+"c"+
", buffer "+buffer+
", offset "+bufferOffset+
", vboUsage "+vboUsage+
", vboName "+vboName+
"]";
}
public static final Class getBufferClass(int dataType) {
switch(dataType) {
case GL.GL_BYTE:
case GL.GL_UNSIGNED_BYTE:
return ByteBuffer.class;
case GL.GL_SHORT:
case GL.GL_UNSIGNED_SHORT:
return ShortBuffer.class;
case GL2ES1.GL_FIXED:
return IntBuffer.class;
case GL.GL_FLOAT:
return FloatBuffer.class;
default:
throw new GLException("Given OpenGL data type not supported: "+dataType);
}
}
public void setName(String newName) {
location = -1;
name = newName;
}
public void setVBOUsage(boolean vboUsage) {
this.vboUsage=vboUsage;
}
public void setVBOName(int vboName) {
this.vboName=vboName;
setVBOUsage(vboName>0);
}
protected void init(String name, int index, int comps, int dataType, boolean normalized, int stride, Buffer data,
boolean isVertexAttribute,
int vboName, long bufferOffset)
throws GLException
{
this.isVertexAttribute = isVertexAttribute;
this.index = index;
this.location = -1;
this.name = (null==name)?GLContext.getPredefinedArrayIndexName(index):name;
if(null==this.name) {
throw new GLException("Not a valid GL array index: "+index);
}
this.dataType = dataType;
this.clazz = getBufferClass(dataType);
switch(dataType) {
case GL.GL_BYTE:
case GL.GL_UNSIGNED_BYTE:
case GL.GL_SHORT:
case GL.GL_UNSIGNED_SHORT:
case GL2ES1.GL_FIXED:
this.normalized = normalized;
break;
default:
this.normalized = false;
}
int bpc = getComponentSize();
if(0<stride && stride<comps*bpc) {
throw new GLException("stride ("+stride+") lower than component bytes, "+comps+" * "+bpc);
}
if(0<stride && stride%bpc!=0) {
throw new GLException("stride ("+stride+") not a multiple of bpc "+bpc);
}
this.buffer = data;
this.components = comps;
this.stride=stride;
this.strideB=(0==stride)?comps*bpc:stride;
this.strideL=(0==stride)?comps:strideB/bpc;
this.vboName=vboName;
this.vboUsage=vboName>0;
this.bufferOffset=bufferOffset;
}
protected GLArrayDataWrapper() { }
protected int index;
protected int location;
protected String name;
protected int components;
protected int dataType;
protected boolean normalized;
protected int stride; // user given stride
protected int strideB; // stride in bytes
protected int strideL; // stride in logical components
protected Class clazz;
protected Buffer buffer;
protected boolean isVertexAttribute;
protected long bufferOffset;
protected int vboName;
protected boolean vboUsage;
}
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