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package com.sun.opengl.util.glsl;
import javax.media.opengl.*;
import javax.media.opengl.fixedfunc.*;
import com.sun.opengl.util.*;
import com.sun.opengl.util.glsl.ShaderState;
import java.nio.*;
public class GLSLArrayHandler implements GLArrayHandler {
private GLArrayDataEditable ad;
public GLSLArrayHandler(GLArrayDataEditable ad) {
this.ad = ad;
}
protected final void passVertexAttribPointer(GL2ES2 gl, ShaderState st) {
st.glVertexAttribPointer(gl, ad);
}
public void enableBuffer(GL gl, boolean enable) {
if(!gl.isGL2ES2()) {
throw new GLException("GLSLArrayHandler expects a GL2ES2 implementation");
}
GL2ES2 glsl = gl.getGL2ES2();
ShaderState st = ShaderState.getCurrent();
if(null==st) {
throw new GLException("No ShaderState current");
}
if(enable) {
st.glEnableVertexAttribArray(glsl, ad.getName());
Buffer buffer = ad.getBuffer();
if(ad.isVBO()) {
// always bind and refresh the VBO mgr,
// in case more than one gl*Pointer objects are in use
glsl.glBindBuffer(GL.GL_ARRAY_BUFFER, ad.getVBOName());
if(!ad.isBufferWritten()) {
if(null!=buffer) {
glsl.glBufferData(GL.GL_ARRAY_BUFFER, buffer.limit() * ad.getComponentSize(), buffer, ad.getBufferUsage());
}
ad.setBufferWritten(true);
}
passVertexAttribPointer(glsl, st);
} else if(null!=buffer) {
passVertexAttribPointer(glsl, st);
ad.setBufferWritten(true);
}
} else {
if(ad.isVBO()) {
glsl.glBindBuffer(GL.GL_ARRAY_BUFFER, 0);
}
st.glDisableVertexAttribArray(glsl, ad.getName());
}
}
}
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