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/*
* Copyright 2012 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package com.metsci.glimpse.jogamp.opengl.util.awt.text;
import java.nio.FloatBuffer;
import javax.media.opengl.GL;
import javax.media.opengl.GL2;
/**
* {@link QuadPipeline} for use with OpenGL 1.1.
*/
/*@VisibleForTesting*/
/*@NotThreadSafe*/
public final class QuadPipelineGL11 extends AbstractQuadPipeline
{
/**
* Number of vertices per primitive.
*/
/*@Nonnegative*/
private static final int VERTS_PER_PRIM = 4;
/**
* Number of primitives per quad.
*/
/*@Nonnegative*/
private static final int PRIMS_PER_QUAD = 1;
/**
* Vertex array for points.
*/
/*@Nonnull*/
private final FloatBuffer pointsArray;
/**
* Vertex array for texture coordinates.
*/
/*@Nonnull*/
private final FloatBuffer coordsArray;
/**
* Constructs a {@link QuadPipelineGL11}.
*/
/*@VisibleForTesting*/
public QuadPipelineGL11( )
{
super( VERTS_PER_PRIM, PRIMS_PER_QUAD );
pointsArray = createFloatBufferView( getData( ), POINT_OFFSET );
coordsArray = createFloatBufferView( getData( ), COORD_OFFSET );
}
@Override
public void beginRendering( /*@Nonnull*/ final GL gl )
{
super.beginRendering( gl );
final GL2 gl2 = gl.getGL2( );
// Push state
gl2.glPushClientAttrib( ( int ) GL2.GL_ALL_CLIENT_ATTRIB_BITS );
// Points
gl2.glEnableClientState( GL2.GL_VERTEX_ARRAY );
gl2.glVertexPointer( FLOATS_PER_POINT, // size
GL2.GL_FLOAT, // type
STRIDE, // stride
pointsArray ); // pointer
// Coordinates
gl2.glEnableClientState( GL2.GL_TEXTURE_COORD_ARRAY );
gl2.glTexCoordPointer( FLOATS_PER_COORD, // size
GL2.GL_FLOAT, // type
STRIDE, // stride
coordsArray ); // pointer
}
/**
* Makes a view of a float buffer at a certain position.
*
* @param fb Original float buffer
* @param position Index to start view at
* @return Resulting float buffer
* @throws NullPointerException if float buffer is null
* @throws IllegalArgumentException if position is negative
*/
/*@Nonnull*/
private static FloatBuffer createFloatBufferView( /*@Nonnull*/ final FloatBuffer fb, /*@Nonnegative*/ final int position )
{
Check.notNull( fb, "Buffer cannot be null" );
Check.argument( position >= 0, "Possition cannot be negative" );
// Store original position
final int original = fb.position( );
// Make a view at desired position
fb.position( position );
final FloatBuffer view = fb.asReadOnlyBuffer( );
// Reset buffer to original position
fb.position( original );
return view;
}
@Override
protected void doFlush( /*@Nonnull*/ final GL gl )
{
Check.notNull( gl, "GL cannot be null" );
final GL2 gl2 = gl.getGL2( );
gl2.glDrawArrays( GL2.GL_QUADS, // mode
0, // first
getSizeInVertices( ) ); // count
clear( );
}
@Override
public void endRendering( /*@Nonnull*/ final GL gl )
{
Check.notNull( gl, "GL cannot be null" );
super.endRendering( gl );
final GL2 gl2 = gl.getGL2( );
// Pop state
gl2.glPopClientAttrib( );
}
}
