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Simplification work

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Caspian Rychlik-Prince 2004-03-26 11:26:04 +00:00
parent fca57cefd5
commit 3df3d2d401
9 changed files with 184 additions and 230 deletions
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34
src/java/org/lwjgl/opengl/Util.java
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@ -33,6 +33,8 @@ package org.lwjgl.opengl;
import java.nio.*;
import org.lwjgl.BufferUtils;
/**
* Simple utility class.
*
@ -40,34 +42,28 @@ import java.nio.*;
* @version $Revision$
*/
abstract class Util {
public final class Util {
static final IntBuffer int_buffer = ByteBuffer.allocateDirect(64).order(ByteOrder.nativeOrder()).asIntBuffer();
private static final IntBuffer int_buffer = BufferUtils.createIntBuffer(16);
/**
* A helper function which is used to get the byte offset in an arbitrary buffer
* based on its position
* @return the position of the buffer, in BYTES
* No c'tor
*/
static int getOffset(Buffer buffer) {
if (buffer instanceof FloatBuffer || buffer instanceof IntBuffer)
return buffer.position() << 2;
else if (buffer instanceof ShortBuffer || buffer instanceof CharBuffer)
return buffer.position() << 1;
else if (buffer instanceof DoubleBuffer || buffer instanceof LongBuffer)
return buffer.position() << 3;
else
return buffer.position();
}
static void checkGLError() {
private Util() {}
public static void checkGLError() {
int err = GL11.glGetError();
if (err != GL11.GL_NO_ERROR) {
throw new OpenGLException(err);
}
}
static int getGLInteger(int gl_enum) {
/**
* Obtain a GL integer value from the driver
* @param gl_enum The GL value you want
* @return the integer value
*/
public static int glGetInteger(int gl_enum) {
GL11.glGetInteger(gl_enum, int_buffer);
return int_buffer.get(0);
}