LwjglGL20.java

/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
 * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations under the License.
 ******************************************************************************/

package com.badlogic.gdx.backends.lwjgl;

import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.DoubleBuffer;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.nio.ShortBuffer;

import org.lwjgl.BufferUtils;
import org.lwjgl.opengl.EXTFramebufferObject;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL13;
import org.lwjgl.opengl.GL14;
import org.lwjgl.opengl.GL15;
import org.lwjgl.opengl.GL20;

import com.badlogic.gdx.graphics.GL10;
import com.badlogic.gdx.utils.GdxRuntimeException;

/**
 * An implementation of the {@link GL20} interface based on LWJGL. Note that LWJGL shaders and OpenGL ES shaders will
 * not be 100% compatible. Some glGetXXX methods are not implemented.
 * 
 * @author mzechner
 */
final class LwjglGL20 implements com.badlogic.gdx.graphics.GL20 {
	public void glActiveTexture(int texture) {
		GL13.glActiveTexture(texture);
	}

	public void glAttachShader(int program, int shader) {
		GL20.glAttachShader(program, shader);
	}

	public void glBindAttribLocation(int program, int index, String name) {
		GL20.glBindAttribLocation(program, index, name);
	}

	public void glBindBuffer(int target, int buffer) {
		GL15.glBindBuffer(target, buffer);
	}

	public void glBindFramebuffer(int target, int framebuffer) {
		EXTFramebufferObject.glBindFramebufferEXT(target, framebuffer);
	}

	public void glBindRenderbuffer(int target, int renderbuffer) {
		EXTFramebufferObject.glBindRenderbufferEXT(target, renderbuffer);
	}

	public void glBindTexture(int target, int texture) {
		GL11.glBindTexture(target, texture);
	}

	public void glBlendColor(float red, float green, float blue, float alpha) {
		GL14.glBlendColor(red, green, blue, alpha);
	}

	public void glBlendEquation(int mode) {
		GL14.glBlendEquation(mode);
	}

	public void glBlendEquationSeparate(int modeRGB, int modeAlpha) {
		GL20.glBlendEquationSeparate(modeRGB, modeAlpha);
	}

	public void glBlendFunc(int sfactor, int dfactor) {
		GL11.glBlendFunc(sfactor, dfactor);
	}

	public void glBlendFuncSeparate(int srcRGB, int dstRGB, int srcAlpha, int dstAlpha) {
		GL14.glBlendFuncSeparate(srcRGB, dstRGB, srcAlpha, dstAlpha);
	}

	public void glBufferData(int target, int size, Buffer data, int usage) {
		if (data instanceof ByteBuffer)
			GL15.glBufferData(target, (ByteBuffer) data, usage);
		else if (data instanceof IntBuffer)
			GL15.glBufferData(target, (IntBuffer) data, usage);
		else if (data instanceof FloatBuffer)
			GL15.glBufferData(target, (FloatBuffer) data, usage);
		else if (data instanceof DoubleBuffer)
			GL15.glBufferData(target, (DoubleBuffer) data, usage);
		else if (data instanceof ShortBuffer) //
			GL15.glBufferData(target, (ShortBuffer) data, usage);
	}

	public void glBufferSubData(int target, int offset, int size, Buffer data) {
		if (data instanceof ByteBuffer)
			GL15.glBufferSubData(target, offset, (ByteBuffer) data);
		else if (data instanceof IntBuffer)
			GL15.glBufferSubData(target, offset, (IntBuffer) data);
		else if (data instanceof FloatBuffer)
			GL15.glBufferSubData(target, offset, (FloatBuffer) data);
		else if (data instanceof DoubleBuffer)
			GL15.glBufferSubData(target, offset, (DoubleBuffer) data);
		else if (data instanceof ShortBuffer) //
			GL15.glBufferSubData(target, offset, (ShortBuffer) data);
	}

	public int glCheckFramebufferStatus(int target) {
		return EXTFramebufferObject.glCheckFramebufferStatusEXT(target);
	}

	public void glClear(int mask) {
		GL11.glClear(mask);
	}

	public void glClearColor(float red, float green, float blue, float alpha) {
		GL11.glClearColor(red, green, blue, alpha);
	}

	public void glClearDepthf(float depth) {
		GL11.glClearDepth(depth);
	}

	public void glClearStencil(int s) {
		GL11.glClearStencil(s);
	}

	public void glColorMask(boolean red, boolean green, boolean blue, boolean alpha) {
		GL11.glColorMask(red, green, blue, alpha);
	}

	public void glCompileShader(int shader) {
		GL20.glCompileShader(shader);
	}

	public void glCompressedTexImage2D(int target, int level, int internalformat, int width, int height, int border,
			int imageSize, Buffer data) {
		throw new GdxRuntimeException("not implemented");
	}

	public void glCompressedTexSubImage2D(int target, int level, int xoffset, int yoffset, int width, int height,
			int format, int imageSize, Buffer data) {
		throw new GdxRuntimeException("not implemented");
	}

	public void glCopyTexImage2D(int target, int level, int internalformat, int x, int y, int width, int height,
			int border) {
		GL11.glCopyTexImage2D(target, level, internalformat, x, y, width, height, border);
	}

	public void glCopyTexSubImage2D(int target, int level, int xoffset, int yoffset, int x, int y, int width, int height) {
		GL11.glCopyTexSubImage2D(target, level, xoffset, yoffset, x, y, width, height);
	}

	public int glCreateProgram() {
		return GL20.glCreateProgram();
	}

	public int glCreateShader(int type) {
		return GL20.glCreateShader(type);
	}

	public void glCullFace(int mode) {
		GL11.glCullFace(mode);
	}

	public void glDeleteBuffers(int n, IntBuffer buffers) {
		GL15.glDeleteBuffers(buffers);
	}

	public void glDeleteFramebuffers(int n, IntBuffer framebuffers) {
		EXTFramebufferObject.glDeleteFramebuffersEXT(framebuffers);
	}

	public void glDeleteProgram(int program) {
		GL20.glDeleteProgram(program);
	}

	public void glDeleteRenderbuffers(int n, IntBuffer renderbuffers) {
		EXTFramebufferObject.glDeleteRenderbuffersEXT(renderbuffers);
	}

	public void glDeleteShader(int shader) {
		GL20.glDeleteShader(shader);
	}

	public void glDeleteTextures(int n, IntBuffer textures) {
		GL11.glDeleteTextures(textures);
	}

	public void glDepthFunc(int func) {
		GL11.glDepthFunc(func);
	}

	public void glDepthMask(boolean flag) {
		GL11.glDepthMask(flag);
	}

	public void glDepthRangef(float zNear, float zFar) {
		GL11.glDepthRange(zNear, zFar);
	}

	public void glDetachShader(int program, int shader) {
		GL20.glDetachShader(program, shader);
	}

	public void glDisable(int cap) {
		GL11.glDisable(cap);
	}

	public void glDisableVertexAttribArray(int index) {
		GL20.glDisableVertexAttribArray(index);
	}

	public void glDrawArrays(int mode, int first, int count) {
		GL11.glDrawArrays(mode, first, count);
	}

	public void glDrawElements(int mode, int count, int type, Buffer indices) {
		if (indices instanceof ShortBuffer && type == GL10.GL_UNSIGNED_SHORT)
			GL11.glDrawElements(mode, (ShortBuffer) indices);
		else if (indices instanceof ByteBuffer && type == GL10.GL_UNSIGNED_SHORT)
			GL11.glDrawElements(mode, ((ByteBuffer) indices).asShortBuffer()); // FIXME yay...
		else if (indices instanceof ByteBuffer && type == GL10.GL_UNSIGNED_BYTE)
			GL11.glDrawElements(mode, (ByteBuffer) indices);
		else
			throw new GdxRuntimeException("Can't use " + indices.getClass().getName()
					+ " with this method. Use ShortBuffer or ByteBuffer instead. Blame LWJGL");
	}

	public void glEnable(int cap) {
		GL11.glEnable(cap);
	}

	public void glEnableVertexAttribArray(int index) {
		GL20.glEnableVertexAttribArray(index);
	}

	public void glFinish() {
		GL11.glFinish();
	}

	public void glFlush() {
		GL11.glFlush();
	}

	public void glFramebufferRenderbuffer(int target, int attachment, int renderbuffertarget, int renderbuffer) {
		EXTFramebufferObject.glFramebufferRenderbufferEXT(target, attachment, renderbuffertarget, renderbuffer);
	}

	public void glFramebufferTexture2D(int target, int attachment, int textarget, int texture, int level) {
		EXTFramebufferObject.glFramebufferTexture2DEXT(target, attachment, textarget, texture, level);
	}

	public void glFrontFace(int mode) {
		GL11.glFrontFace(mode);
	}

	public void glGenBuffers(int n, IntBuffer buffers) {
		GL15.glGenBuffers(buffers);
	}

	public void glGenFramebuffers(int n, IntBuffer framebuffers) {
		EXTFramebufferObject.glGenFramebuffersEXT(framebuffers);
	}

	public void glGenRenderbuffers(int n, IntBuffer renderbuffers) {
		EXTFramebufferObject.glGenRenderbuffersEXT(renderbuffers);
	}

	public void glGenTextures(int n, IntBuffer textures) {
		GL11.glGenTextures(textures);
	}

	public void glGenerateMipmap(int target) {
		EXTFramebufferObject.glGenerateMipmapEXT(target);
	}

	public String glGetActiveAttrib(int program, int index, IntBuffer size, Buffer type) {
		// FIXME this is less than ideal of course...
		IntBuffer typeTmp = BufferUtils.createIntBuffer(2);
		String name = GL20.glGetActiveAttrib(program, index, 256, typeTmp);
		if (type instanceof IntBuffer)
			((IntBuffer) type).put(typeTmp.get(0));
		return name;
	}

	public String glGetActiveUniform(int program, int index, IntBuffer size, Buffer type) {
		// FIXME this is less than ideal of course...
		IntBuffer typeTmp = BufferUtils.createIntBuffer(2);
		String name = GL20.glGetActiveUniform(program, index, 256, typeTmp);
		if (type instanceof IntBuffer)
			((IntBuffer) type).put(typeTmp.get(0));
		return name;
	}

	public void glGetAttachedShaders(int program, int maxcount, Buffer count, IntBuffer shaders) {
		GL20.glGetAttachedShaders(program, (IntBuffer) count, shaders);
	}

	public int glGetAttribLocation(int program, String name) {
		return GL20.glGetAttribLocation(program, name);
	}

	public void glGetBooleanv(int pname, Buffer params) {
		GL11.glGetBoolean(pname, (ByteBuffer) params);
	}

	public void glGetBufferParameteriv(int target, int pname, IntBuffer params) {
		GL15.glGetBufferParameter(target, pname, params);
	}

	public int glGetError() {
		return GL11.glGetError();
	}

	public void glGetFloatv(int pname, FloatBuffer params) {
		GL11.glGetFloat(pname, params);
	}

	public void glGetFramebufferAttachmentParameteriv(int target, int attachment, int pname, IntBuffer params) {
		EXTFramebufferObject.glGetFramebufferAttachmentParameterEXT(target, attachment, pname, params);
	}

	public void glGetIntegerv(int pname, IntBuffer params) {
		GL11.glGetInteger(pname, params);
	}

	public String glGetProgramInfoLog(int program) {
		ByteBuffer buffer = ByteBuffer.allocateDirect(1024 * 10);
		buffer.order(ByteOrder.nativeOrder());
		ByteBuffer tmp = ByteBuffer.allocateDirect(4);
		tmp.order(ByteOrder.nativeOrder());
		IntBuffer intBuffer = tmp.asIntBuffer();

		GL20.glGetProgramInfoLog(program, intBuffer, buffer);
		int numBytes = intBuffer.get(0);
		byte[] bytes = new byte[numBytes];
		buffer.get(bytes);
		return new String(bytes);
	}

	public void glGetProgramiv(int program, int pname, IntBuffer params) {
		GL20.glGetProgram(program, pname, params);
	}

	public void glGetRenderbufferParameteriv(int target, int pname, IntBuffer params) {
		EXTFramebufferObject.glGetRenderbufferParameterEXT(target, pname, params);
	}

	public String glGetShaderInfoLog(int shader) {
		ByteBuffer buffer = ByteBuffer.allocateDirect(1024 * 10);
		buffer.order(ByteOrder.nativeOrder());
		ByteBuffer tmp = ByteBuffer.allocateDirect(4);
		tmp.order(ByteOrder.nativeOrder());
		IntBuffer intBuffer = tmp.asIntBuffer();

		GL20.glGetShaderInfoLog(shader, intBuffer, buffer);
		int numBytes = intBuffer.get(0);
		byte[] bytes = new byte[numBytes];
		buffer.get(bytes);
		return new String(bytes);
	}

	public void glGetShaderPrecisionFormat(int shadertype, int precisiontype, IntBuffer range, IntBuffer precision) {
		throw new UnsupportedOperationException("unsupported, won't implement");
	}

	public void glGetShaderSource(int shader, int bufsize, Buffer length, String source) {
		throw new UnsupportedOperationException("unsupported, won't implement.");
	}

	public void glGetShaderiv(int shader, int pname, IntBuffer params) {
		GL20.glGetShader(shader, pname, params);
	}

	public String glGetString(int name) {
		return GL11.glGetString(name);
	}

	public void glGetTexParameterfv(int target, int pname, FloatBuffer params) {
		GL11.glGetTexParameter(target, pname, params);
	}

	public void glGetTexParameteriv(int target, int pname, IntBuffer params) {
		GL11.glGetTexParameter(target, pname, params);
	}

	public int glGetUniformLocation(int program, String name) {
		return GL20.glGetUniformLocation(program, name);
	}

	public void glGetUniformfv(int program, int location, FloatBuffer params) {
		GL20.glGetUniform(program, location, params);
	}

	public void glGetUniformiv(int program, int location, IntBuffer params) {
		GL20.glGetUniform(program, location, params);
	}

	public void glGetVertexAttribPointerv(int index, int pname, Buffer pointer) {
		throw new UnsupportedOperationException("unsupported, won't implement");
	}

	public void glGetVertexAttribfv(int index, int pname, FloatBuffer params) {
		GL20.glGetVertexAttrib(index, pname, params);
	}

	public void glGetVertexAttribiv(int index, int pname, IntBuffer params) {
		GL20.glGetVertexAttrib(index, pname, params);
	}

	public void glHint(int target, int mode) {
		GL11.glHint(target, mode);
	}

	public boolean glIsBuffer(int buffer) {
		return GL15.glIsBuffer(buffer);
	}

	public boolean glIsEnabled(int cap) {
		return GL11.glIsEnabled(cap);
	}

	public boolean glIsFramebuffer(int framebuffer) {
		return EXTFramebufferObject.glIsFramebufferEXT(framebuffer);
	}

	public boolean glIsProgram(int program) {
		return GL20.glIsProgram(program);
	}

	public boolean glIsRenderbuffer(int renderbuffer) {
		return EXTFramebufferObject.glIsRenderbufferEXT(renderbuffer);
	}

	public boolean glIsShader(int shader) {
		return GL20.glIsShader(shader);
	}

	public boolean glIsTexture(int texture) {
		return GL11.glIsTexture(texture);
	}

	public void glLineWidth(float width) {
		GL11.glLineWidth(width);
	}

	public void glLinkProgram(int program) {
		GL20.glLinkProgram(program);
	}

	public void glPixelStorei(int pname, int param) {
		GL11.glPixelStorei(pname, param);
	}

	public void glPolygonOffset(float factor, float units) {
		GL11.glPolygonOffset(factor, units);
	}

	public void glReadPixels(int x, int y, int width, int height, int format, int type, Buffer pixels) {
		if (pixels instanceof ByteBuffer)
			GL11.glReadPixels(x, y, width, height, format, type, (ByteBuffer) pixels);
		else if (pixels instanceof ShortBuffer)
			GL11.glReadPixels(x, y, width, height, format, type, (ShortBuffer) pixels);
		else if (pixels instanceof IntBuffer)
			GL11.glReadPixels(x, y, width, height, format, type, (IntBuffer) pixels);
		else if (pixels instanceof FloatBuffer)
			GL11.glReadPixels(x, y, width, height, format, type, (FloatBuffer) pixels);
		else
			throw new GdxRuntimeException("Can't use " + pixels.getClass().getName()
					+ " with this method. Use ByteBuffer, ShortBuffer, IntBuffer or FloatBuffer instead. Blame LWJGL");
	}

	public void glReleaseShaderCompiler() {
		// nothing to do here
	}

	public void glRenderbufferStorage(int target, int internalformat, int width, int height) {
		EXTFramebufferObject.glRenderbufferStorageEXT(target, internalformat, width, height);
	}

	public void glSampleCoverage(float value, boolean invert) {
		GL13.glSampleCoverage(value, invert);
	}

	public void glScissor(int x, int y, int width, int height) {
		GL11.glScissor(x, y, width, height);
	}

	public void glShaderBinary(int n, IntBuffer shaders, int binaryformat, Buffer binary, int length) {
		throw new UnsupportedOperationException("unsupported, won't implement");
	}

	public void glShaderSource(int shader, String string) {
		GL20.glShaderSource(shader, string);
	}

	public void glStencilFunc(int func, int ref, int mask) {
		GL11.glStencilFunc(func, ref, mask);
	}

	public void glStencilFuncSeparate(int face, int func, int ref, int mask) {
		GL20.glStencilFuncSeparate(face, func, ref, mask);
	}

	public void glStencilMask(int mask) {
		GL11.glStencilMask(mask);
	}

	public void glStencilMaskSeparate(int face, int mask) {
		GL20.glStencilMaskSeparate(face, mask);
	}

	public void glStencilOp(int fail, int zfail, int zpass) {
		GL11.glStencilOp(fail, zfail, zpass);
	}

	public void glStencilOpSeparate(int face, int fail, int zfail, int zpass) {
		GL20.glStencilOpSeparate(face, fail, zfail, zpass);
	}

	public void glTexImage2D(int target, int level, int internalformat, int width, int height, int border, int format,
			int type, Buffer pixels) {
		if (pixels instanceof ByteBuffer)
			GL11.glTexImage2D(target, level, internalformat, width, height, border, format, type, (ByteBuffer) pixels);
		else if (pixels instanceof ShortBuffer)
			GL11.glTexImage2D(target, level, internalformat, width, height, border, format, type, (ShortBuffer) pixels);
		else if (pixels instanceof IntBuffer)
			GL11.glTexImage2D(target, level, internalformat, width, height, border, format, type, (IntBuffer) pixels);
		else if (pixels instanceof FloatBuffer)
			GL11.glTexImage2D(target, level, internalformat, width, height, border, format, type, (FloatBuffer) pixels);
		else if (pixels instanceof DoubleBuffer)
			GL11.glTexImage2D(target, level, internalformat, width, height, border, format, type, (DoubleBuffer) pixels);
		else
			throw new GdxRuntimeException(
					"Can't use "
							+ pixels.getClass().getName()
							+ " with this method. Use ByteBuffer, ShortBuffer, IntBuffer, FloatBuffer or DoubleBuffer instead. Blame LWJGL");
	}

	public void glTexParameterf(int target, int pname, float param) {
		GL11.glTexParameterf(target, pname, param);
	}

	public void glTexParameterfv(int target, int pname, FloatBuffer params) {
		GL11.glTexParameter(target, pname, params);
	}

	public void glTexParameteri(int target, int pname, int param) {
		GL11.glTexParameteri(target, pname, param);
	}

	public void glTexParameteriv(int target, int pname, IntBuffer params) {
		GL11.glTexParameter(target, pname, params);
	}

	public void glTexSubImage2D(int target, int level, int xoffset, int yoffset, int width, int height, int format,
			int type, Buffer pixels) {
		if (pixels instanceof ByteBuffer)
			GL11.glTexSubImage2D(target, level, xoffset, yoffset, width, height, format, type, (ByteBuffer) pixels);
		else if (pixels instanceof ShortBuffer)
			GL11.glTexSubImage2D(target, level, xoffset, yoffset, width, height, format, type, (ShortBuffer) pixels);
		else if (pixels instanceof IntBuffer)
			GL11.glTexSubImage2D(target, level, xoffset, yoffset, width, height, format, type, (IntBuffer) pixels);
		else if (pixels instanceof FloatBuffer)
			GL11.glTexSubImage2D(target, level, xoffset, yoffset, width, height, format, type, (FloatBuffer) pixels);
		else if (pixels instanceof DoubleBuffer)
			GL11.glTexSubImage2D(target, level, xoffset, yoffset, width, height, format, type, (DoubleBuffer) pixels);
		else
			throw new GdxRuntimeException(
					"Can't use "
							+ pixels.getClass().getName()
							+ " with this method. Use ByteBuffer, ShortBuffer, IntBuffer, FloatBuffer or DoubleBuffer instead. Blame LWJGL");
	}

	public void glUniform1f(int location, float x) {
		GL20.glUniform1f(location, x);
	}

	public void glUniform1fv(int location, int count, FloatBuffer v) {
		GL20.glUniform1(location, v);
	}

	public void glUniform1i(int location, int x) {
		GL20.glUniform1i(location, x);
	}

	public void glUniform1iv(int location, int count, IntBuffer v) {
		GL20.glUniform1(location, v);
	}

	public void glUniform2f(int location, float x, float y) {
		GL20.glUniform2f(location, x, y);
	}

	public void glUniform2fv(int location, int count, FloatBuffer v) {
		GL20.glUniform2(location, v);
	}

	public void glUniform2i(int location, int x, int y) {
		GL20.glUniform2i(location, x, y);
	}

	public void glUniform2iv(int location, int count, IntBuffer v) {
		GL20.glUniform2(location, v);
	}

	public void glUniform3f(int location, float x, float y, float z) {
		GL20.glUniform3f(location, x, y, z);
	}

	public void glUniform3fv(int location, int count, FloatBuffer v) {
		GL20.glUniform3(location, v);
	}

	public void glUniform3i(int location, int x, int y, int z) {
		GL20.glUniform3i(location, x, y, z);
	}

	public void glUniform3iv(int location, int count, IntBuffer v) {
		GL20.glUniform3(location, v);
	}

	public void glUniform4f(int location, float x, float y, float z, float w) {
		GL20.glUniform4f(location, x, y, z, w);
	}

	public void glUniform4fv(int location, int count, FloatBuffer v) {
		GL20.glUniform4(location, v);
	}

	public void glUniform4i(int location, int x, int y, int z, int w) {
		GL20.glUniform4i(location, x, y, z, w);
	}

	public void glUniform4iv(int location, int count, IntBuffer v) {
		GL20.glUniform4(location, v);
	}

	public void glUniformMatrix2fv(int location, int count, boolean transpose, FloatBuffer value) {
		GL20.glUniformMatrix2(location, transpose, value);
	}

	public void glUniformMatrix3fv(int location, int count, boolean transpose, FloatBuffer value) {
		GL20.glUniformMatrix3(location, transpose, value);
	}

	public void glUniformMatrix4fv(int location, int count, boolean transpose, FloatBuffer value) {
		GL20.glUniformMatrix4(location, transpose, value);
	}

	public void glUseProgram(int program) {
		GL20.glUseProgram(program);
	}

	public void glValidateProgram(int program) {
		GL20.glValidateProgram(program);
	}

	public void glVertexAttrib1f(int indx, float x) {
		GL20.glVertexAttrib1f(indx, x);
	}

	public void glVertexAttrib1fv(int indx, FloatBuffer values) {
		GL20.glVertexAttrib1f(indx, values.get());
	}

	public void glVertexAttrib2f(int indx, float x, float y) {
		GL20.glVertexAttrib2f(indx, x, y);
	}

	public void glVertexAttrib2fv(int indx, FloatBuffer values) {
		GL20.glVertexAttrib2f(indx, values.get(), values.get());
	}

	public void glVertexAttrib3f(int indx, float x, float y, float z) {
		GL20.glVertexAttrib3f(indx, x, y, z);
	}

	public void glVertexAttrib3fv(int indx, FloatBuffer values) {
		GL20.glVertexAttrib3f(indx, values.get(), values.get(), values.get());
	}

	public void glVertexAttrib4f(int indx, float x, float y, float z, float w) {
		GL20.glVertexAttrib4f(indx, x, y, z, w);
	}

	public void glVertexAttrib4fv(int indx, FloatBuffer values) {
		GL20.glVertexAttrib4f(indx, values.get(), values.get(), values.get(), values.get());
	}

	public void glVertexAttribPointer(int indx, int size, int type, boolean normalized, int stride, Buffer buffer) {
		if (buffer instanceof ByteBuffer) {
			if (type == GL_BYTE)
				GL20.glVertexAttribPointer(indx, size, false, normalized, stride, (ByteBuffer) buffer);
			else if (type == GL_UNSIGNED_BYTE)
				GL20.glVertexAttribPointer(indx, size, true, normalized, stride, (ByteBuffer) buffer);
			else if (type == GL_SHORT)
				GL20.glVertexAttribPointer(indx, size, false, normalized, stride, ((ByteBuffer) buffer).asShortBuffer());
			else if (type == GL_UNSIGNED_SHORT)
				GL20.glVertexAttribPointer(indx, size, true, normalized, stride, ((ByteBuffer) buffer).asShortBuffer());
			else if (type == GL_FLOAT)
				GL20.glVertexAttribPointer(indx, size, normalized, stride, ((ByteBuffer) buffer).asFloatBuffer());
			else
				throw new GdxRuntimeException(
						"Can't use "
								+ buffer.getClass().getName()
								+ " with type "
								+ type
								+ " with this method. Use ByteBuffer and one of GL_BYTE, GL_UNSIGNED_BYTE, GL_SHORT, GL_UNSIGNED_SHORT or GL_FLOAT for type. Blame LWJGL");
		} else
			throw new GdxRuntimeException("Can't use " + buffer.getClass().getName()
					+ " with this method. Use ByteBuffer instead. Blame LWJGL");
	}

	public void glViewport(int x, int y, int width, int height) {
		GL11.glViewport(x, y, width, height);
	}

	public void glDrawElements(int mode, int count, int type, int indices) {
		GL11.glDrawElements(mode, count, type, indices);
	}

	public void glVertexAttribPointer(int indx, int size, int type, boolean normalized, int stride, int ptr) {
		GL20.glVertexAttribPointer(indx, size, type, normalized, stride, ptr);
	}

}