/*
 
* Copyright (c) 2016, Metron, Inc.
 
* All rights reserved.
 
*
 
* Redistribution and use in source and binary forms, with or without
 
* modification, are permitted provided that the following conditions are met:
 
*
     
* Redistributions of source code must retain the above copyright
 
*
       
notice, this list of conditions and the following disclaimer.
 
*
     
* 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.
 
*
     
* Neither the name of Metron, Inc. nor the
 
*
       
names of its contributors may be used to endorse or promote products
 
*
       
derived from this software without specific prior written permission.
 
*
 
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 METRON, INC. 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
 
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
*/
package com.metsci.glimpse.dnc;

import static com.metsci.glimpse.gl.shader.GLShaderUtils.createProgram;
import static com.metsci.glimpse.gl.shader.GLShaderUtils.requireResourceText;

import javax.media.opengl.GL2ES2;

public class DncLabelProgram
{

    
public static final String dncLabelVertShader_GLSL = requireResourceText( "shaders/DncPainter/label.vs" );
    
public static final String dncLabelGeomShader_GLSL = requireResourceText( "shaders/DncPainter/label.gs" );
    
public static final String dncLabelFragShader_GLSL = requireResourceText( "shaders/DncPainter/label.fs" );


    
public static class DncLabelProgramHandles
    
{
        
public final int program;

        
public final int AXIS_RECT;
        
public final int VIEWPORT_SIZE_PX;

        
public final int ATLAS;
        
public final int ATLAS_SIZE_PX;

        
public final int HIGHLIGHT_SET;
        
public final int HIGHLIGHT_SCALE;

        
public final int inLabelVertex;
        
public final int inImageAlign;
        
public final int inImageBounds;

        
public DncLabelProgramHandles( GL2ES2 gl )
        
{
            
this.program = createProgram( gl, dncLabelVertShader_GLSL, dncLabelGeomShader_GLSL, dncLabelFragShader_GLSL );

            
this.AXIS_RECT = gl.glGetUniformLocation( program, "AXIS_RECT" );
            
this.VIEWPORT_SIZE_PX = gl.glGetUniformLocation( program, "VIEWPORT_SIZE_PX" );

            
this.ATLAS = gl.glGetUniformLocation( program, "ATLAS" );
            
this.ATLAS_SIZE_PX = gl.glGetUniformLocation( program, "ATLAS_SIZE_PX" );

            
this.HIGHLIGHT_SET = gl.glGetUniformLocation( program, "HIGHLIGHT_SET" );
            
this.HIGHLIGHT_SCALE = gl.glGetUniformLocation( program, "HIGHLIGHT_SCALE" );

            
this.inLabelVertex = gl.glGetAttribLocation( program, "inLabelVertex" );
            
this.inImageAlign = gl.glGetAttribLocation( program, "inImageAlign" );
            
this.inImageBounds = gl.glGetAttribLocation( program, "inImageBounds" );
        
}
    
}


    
protected DncLabelProgramHandles handles;


    
public DncLabelProgram( )
    
{
        
this.handles = null;
    
}

    
/**
     
* Returns the raw GL handles for the shader program, uniforms, and attributes. Compiles and
     
* links the program, if necessary.
     
*/

    
public DncLabelProgramHandles handles( GL2ES2 gl )
    
{
        
if ( this.handles == null )
        
{
            
this.handles = new DncLabelProgramHandles( gl );
        
}

        
return this.handles;
    
}

    
/**
     
* Deletes the program, and resets this object to the way it was before {@link #handles(GL2ES2)}
     
* was first called.
     
* <p>
     
* This object can be safely reused after being disposed, but in most cases there is no
     
* significant advantage to doing so.
     
*/

    
public void dispose( GL2ES2 gl )
    
{
        
if ( this.handles != null )
        
{
            
gl.glDeleteProgram( this.handles.program );
            
this.handles = null;
        
}
    
}

}