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package com.mbien.opencl;
import java.nio.Buffer;
import static com.mbien.opencl.CLGLI.*;
/**
* Shared buffer between OpenGL and OpenCL contexts.
* @author Michael Bien
*/
public final class CLGLBuffer<B extends Buffer> extends CLBuffer<B> {
private CLGLBuffer(CLContext context, B directBuffer, long id) {
super(context, directBuffer, id);
}
static <B extends Buffer> CLGLBuffer<B> create(CLContext context, B directBuffer, int flags, int glBuffer) {
if(directBuffer != null && !directBuffer.isDirect())
throw new IllegalArgumentException("buffer is not a direct buffer");
if(isHostPointerFlag(flags)) {
throw new IllegalArgumentException(
"CL_MEM_COPY_HOST_PTR or CL_MEM_USE_HOST_PTR can not be used with OpenGL Buffers.");
}
CL cl = context.cl;
int[] result = new int[1];
CLGLI clgli = (CLGLI)cl;
long id = clgli.clCreateFromGLBuffer(context.ID, flags, glBuffer, result, 0);
return new CLGLBuffer<B>(context, directBuffer, id);
}
@Override
public <T extends Buffer> CLGLBuffer<T> cloneWith(T directBuffer) {
return new CLGLBuffer<T>(context, directBuffer, ID);
}
/**
* Returns the OpenGL buffer type of this shared buffer.
*/
public GLObjectType getGLObjectType() {
int[] array = new int[1];
int ret = ((CLGLI)cl).clGetGLObjectInfo(ID, array, 0, null, 0);
CLException.checkForError(ret, "error while asking for gl object info");
return GLObjectType.valueOf(array[0]);
}
/**
* Returns the OpenGL object id of this shared buffer.
*/
public int getGLObjectID() {
int[] array = new int[1];
int ret = ((CLGLI)cl).clGetGLObjectInfo(ID, null, 0, array, 0);
CLException.checkForError(ret, "error while asking for gl object info");
return array[0];
}
public enum GLObjectType {
GL_OBJECT_BUFFER(CL_GL_OBJECT_BUFFER),
GL_OBJECT_TEXTURE2D(CL_GL_OBJECT_TEXTURE2D),
GL_OBJECT_TEXTURE3D(CL_GL_OBJECT_TEXTURE3D),
GL_OBJECT_RENDERBUFFER(CL_GL_OBJECT_RENDERBUFFER);
public final int TYPE;
private GLObjectType(int type) {
this.TYPE = type;
}
public static GLObjectType valueOf(int type) {
if(type == CL_GL_OBJECT_BUFFER)
return GL_OBJECT_BUFFER;
else if(type == CL_GL_OBJECT_TEXTURE2D)
return GL_OBJECT_TEXTURE2D;
else if(type == CL_GL_OBJECT_TEXTURE3D)
return GL_OBJECT_TEXTURE3D;
else if(type == CL_GL_OBJECT_RENDERBUFFER)
return GL_OBJECT_RENDERBUFFER;
return null;
}
}
}
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