TextureStreamPBODefault.java

/*
 * Copyright (c) 2002-2012 LWJGL Project
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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package org.lwjgl.util.stream;

import org.lwjgl.opengl.ContextCapabilities;
import org.lwjgl.util.stream.StreamUtil.TextureStreamFactory;

import static org.lwjgl.opengl.GL15.*;
import static org.lwjgl.opengl.GL21.*;

/** Implements streaming PBO updates to an OpenGL texture. */
public class TextureStreamPBODefault extends TextureStreamPBO {

	public static final TextureStreamFactory FACTORY = new TextureStreamFactory("Asynchronous PBO") {
		public boolean isSupported(final ContextCapabilities caps) {
			return caps.OpenGL21 || caps.GL_ARB_pixel_buffer_object || caps.GL_EXT_pixel_buffer_object;
		}

		public TextureStream create(final StreamHandler handler, final int transfersToBuffer) {
			return new TextureStreamPBODefault(handler, transfersToBuffer);
		}
	};

	public TextureStreamPBODefault(final StreamHandler handler, final int transfersToBuffer) {
		super(handler, transfersToBuffer);
	}

	protected void postProcess(final int index) {
		glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER);
	}

	protected void postUpload(final int index) {
	}

	public void pinBuffer(final int index) {
		glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos[index]);
		glBufferData(GL_PIXEL_UNPACK_BUFFER, height * stride, GL_STREAM_DRAW); // Orphan previous buffer
		pinnedBuffers[index] = glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY, height * stride, pinnedBuffers[index]);
		glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
	}

	public void destroy() {
		destroyObjects();
	}

}