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/*
* 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
* 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.
*/
package com.metsci.glimpse.worldwind.tile;
import static com.metsci.glimpse.util.logging.LoggerUtils.logWarning;
import java.util.List;
import java.util.logging.Logger;
import javax.media.opengl.GL;
import javax.media.opengl.GL2;
import javax.media.opengl.GLContext;
import com.metsci.glimpse.axis.Axis2D;
import com.metsci.glimpse.canvas.FBOGlimpseCanvas;
import com.metsci.glimpse.layout.GlimpseAxisLayout2D;
import com.metsci.glimpse.layout.GlimpseLayout;
import com.metsci.glimpse.painter.decoration.BackgroundPainter;
import com.metsci.glimpse.painter.texture.ShadedTexturePainter;
import com.metsci.glimpse.support.projection.FlatProjection;
import com.metsci.glimpse.support.projection.GeoReprojection;
import com.metsci.glimpse.support.texture.ExternalTextureProjected2D;
import com.metsci.glimpse.support.texture.TextureProjected2D;
import com.metsci.glimpse.util.geo.projection.GeoProjection;
import gov.nasa.worldwind.geom.LatLon;
import gov.nasa.worldwind.util.OGLStackHandler;
public class GlimpseReprojectingSurfaceTile extends GlimpseResizingSurfaceTile
{
private static final Logger logger = Logger.getLogger( GlimpseReprojectingSurfaceTile.class.getSimpleName( ) );
private static double REPROJECT_DISCRETIZE_FRACTION = 0.01;
protected FBOGlimpseCanvas reprojectCanvas;
protected ShadedTexturePainter texturePainter;
protected GlimpseAxisLayout2D reprojectLayout;
protected TextureProjected2D texture;
protected GeoReprojection reproject;
protected GeoProjection projectionTo;
protected double minX, maxX, minY, maxY;
public GlimpseReprojectingSurfaceTile( GlimpseLayout layout, Axis2D axes, GeoProjection from, GeoProjection to, int preferredWidth, int preferredHeight, double minLat, double maxLat, double minLon, double maxLon )
{
super( layout, axes, from, 8192, 8192, preferredWidth, preferredHeight, minLat, maxLat, minLon, maxLon );
this.projectionTo = to;
}
public GlimpseReprojectingSurfaceTile( GlimpseLayout layout, Axis2D axes, GeoProjection from, GeoProjection to, int preferredWidth, int preferredHeight, List corners )
{
super( layout, axes, from, 8192, 8192, preferredWidth, preferredHeight, corners );
this.projectionTo = to;
}
public GlimpseReprojectingSurfaceTile( GlimpseLayout layout, Axis2D axes, GeoProjection from, GeoProjection to, int maxWidth, int maxHeight, int preferredWidth, int preferredHeight, double minLat, double maxLat, double minLon, double maxLon )
{
super( layout, axes, from, maxWidth, maxHeight, preferredWidth, preferredHeight, minLat, maxLat, minLon, maxLon );
this.projectionTo = to;
}
public GlimpseReprojectingSurfaceTile( GlimpseLayout layout, Axis2D axes, GeoProjection from, GeoProjection to, int maxWidth, int maxHeight, int preferredWidth, int preferredHeight, List corners )
{
super( layout, axes, from, maxWidth, maxHeight, preferredWidth, preferredHeight, corners );
this.projectionTo = to;
}
protected void init( GLContext context )
{
this.reprojectCanvas = new FBOGlimpseCanvas( context, width, height );
this.texturePainter = new ShadedTexturePainter( );
this.reprojectLayout = new GlimpseAxisLayout2D( new Axis2D( ) );
this.reprojectLayout.addPainter( new BackgroundPainter( ).setColor( 0f, 0f, 0f, 0f ) );
this.reprojectLayout.addPainter( this.texturePainter );
this.reprojectCanvas.addLayout( this.reprojectLayout );
}
@Override
protected int getTextureHandle( )
{
return reprojectCanvas.getTextureName( );
}
@Override
protected void resizeCanvas( int width, int height )
{
super.resizeCanvas( width, height );
reprojectCanvas.resize( width, height );
updateProjection( width, height );
}
@Override
protected void setTextureScale( TextureSurfaceTile tile, float scaleX, float scaleY )
{
// do nothing -- keep the TextureSurfaceTile scale at 1.0
// (GlimpseReprojectingSurfaceTile fills the entire canvas
// when it reprojects the offscreen rendered texture)
}
protected void updateProjection( int width, int height )
{
minX = axes.getMinX( );
maxX = axes.getMaxX( );
minY = axes.getMinY( );
maxY = axes.getMaxY( );
// the scene was drawn onto the offscreenCanvas using the bounds specified by axes
// create a projection which allows us to map to axis coordinates given
// a 0.0 to 1.0 relative coordinate in the offscreenCanvas texture
FlatProjection flat = new FlatProjection( axes, 0, scaleX, 0, scaleY );
// build the reprojection (an instance of com.metsci.glimpse.support.projection.Projection)
reproject = new GeoReprojection( flat, projection, projectionTo, REPROJECT_DISCRETIZE_FRACTION );
// set the reprojection on the texture
if ( texture != null )
{
texture.setProjection( reproject );
}
// set reprojectLayout axes to reflect the lat/lon bounds of the surface tile
// in the "to" projection (for Worldwind, this projection is usually a
// PlateCareeProjection)
setAxes( reprojectLayout.getAxis( ), bounds, projectionTo );
}
@Override
protected void drawOffscreen( GLContext glContext )
{
// draw the GlimpseLayout into the offscreenCanvas
super.drawOffscreen( glContext );
// get a handle to the texture offscreenCanvas drew into
if ( texture == null )
{
init( glContext );
int width = offscreenCanvas.getTargetBounds( ).getWidth( );
int height = offscreenCanvas.getTargetBounds( ).getHeight( );
int texHandle = offscreenCanvas.getTextureName( );
texture = new ExternalTextureProjected2D( texHandle, width, height, false )
{
@Override
protected void putVertexCoords( int texIndex, double texFracX, double texFracY, float[] temp )
{
super.putVertexCoords( texIndex, ( float ) texFracX * scaleX, ( float ) texFracY * scaleY, temp );
}
@Override
protected void putVertexTexCoords( int texIndex, double texFracX, double texFracY )
{
super.putVertexTexCoords( texIndex, ( float ) texFracX * scaleX, ( float ) texFracY * scaleY );
}
@Override
protected void prepare_glState( GL gl )
{
gl.glEnable( GL2.GL_TEXTURE_2D );
gl.glDisable( GL2.GL_BLEND );
}
};
texturePainter.removeAllDrawableTextures( );
texturePainter.addDrawableTexture( texture );
if ( reproject != null )
{
texture.setProjection( reproject );
}
}
// rebuild the projection if the axes changed
if ( didAxesChange( axes ) )
{
updateProjection( currentWidth, currentHeight );
}
OGLStackHandler stack = new OGLStackHandler( );
GL2 gl = glContext.getGL( ).getGL2( );
stack.pushAttrib( gl, GL2.GL_ALL_ATTRIB_BITS );
stack.pushClientAttrib( gl, ( int ) GL2.GL_ALL_CLIENT_ATTRIB_BITS );
stack.pushTexture( gl );
gl.glLoadIdentity( );
stack.pushModelview( gl );
stack.pushProjection( gl );
GLContext c = offscreenCanvas.getGLContext( );
if ( c != null )
{
c.makeCurrent( );
try
{
reprojectCanvas.paint( );
}
catch ( Exception e )
{
logWarning( logger, "Trouble drawing to offscreen buffer", e );
}
finally
{
glContext.makeCurrent( );
stack.pop( gl );
}
}
}
protected boolean didAxesChange( Axis2D axis )
{
return ! ( axis.getMinX( ) == minX && axis.getMaxX( ) == maxX && axis.getMinY( ) == minY && axis.getMaxY( ) == maxY );
}
}
