/*******************************************************************************
* Copyright 2012 Geoscience Australia
*
* 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 au.gov.ga.earthsci.worldwind.common.render;
import java.awt.Dimension;
import javax.media.opengl.GL2;
/**
* Class used by the {@link FrameBuffer} to generate/store the texture.
*
* @author Michael de Hoog (michael.dehoog@ga.gov.au)
*/
public class FrameBufferTexture
{
private int id = 0;
private int target = GL2.GL_TEXTURE_2D;
private int minificationFilter = GL2.GL_LINEAR;
private int magnificationFilter = GL2.GL_LINEAR;
private int internalFormat = GL2.GL_RGBA8;
private int format = GL2.GL_RGBA;
private int type = GL2.GL_UNSIGNED_BYTE;
protected void create(GL2 gl, Dimension dimensions)
{
delete(gl);
int[] textures = new int[1];
gl.glGenTextures(1, textures, 0);
if (textures[0] <= 0)
{
throw new IllegalStateException("Error generating texture for frame buffer");
}
id = textures[0];
gl.glBindTexture(getTarget(), id);
gl.glTexParameteri(getTarget(), GL2.GL_TEXTURE_MAG_FILTER, getMagnificationFilter());
gl.glTexParameteri(getTarget(), GL2.GL_TEXTURE_MIN_FILTER, getMinificationFilter());
gl.glTexParameteri(getTarget(), GL2.GL_TEXTURE_WRAP_S, GL2.GL_CLAMP);
gl.glTexParameteri(getTarget(), GL2.GL_TEXTURE_WRAP_T, GL2.GL_CLAMP);
gl.glTexEnvf(GL2.GL_TEXTURE_ENV, GL2.GL_TEXTURE_ENV_MODE, GL2.GL_MODULATE);
gl.glTexImage2D(getTarget(), 0, getInternalFormat(), dimensions.width, dimensions.height, 0, getFormat(),
getType(), null);
gl.glBindTexture(getTarget(), 0);
}
protected void delete(GL2 gl)
{
if (isCreated())
{
gl.glDeleteTextures(1, new int[] { id }, 0);
id = 0;
}
}
public boolean isCreated()
{
return id > 0;
}
public int getId()
{
return id;
}
public int getTarget()
{
return target;
}
public void setTarget(int target)
{
this.target = target;
}
public int getMinificationFilter()
{
return minificationFilter;
}
public void setMinificationFilter(int minificationFilter)
{
this.minificationFilter = minificationFilter;
}
public int getMagnificationFilter()
{
return magnificationFilter;
}
public void setMagnificationFilter(int magnificationFilter)
{
this.magnificationFilter = magnificationFilter;
}
public int getInternalFormat()
{
return internalFormat;
}
public void setInternalFormat(int internalFormat)
{
this.internalFormat = internalFormat;
}
public int getFormat()
{
return format;
}
public void setFormat(int format)
{
this.format = format;
}
public int getType()
{
return type;
}
public void setType(int type)
{
this.type = type;
}
}