[Jrman-commit] drafts/src/org/jrman/util TriangleSamplesFilter.java,NONE,1.1 SincSamplesFilter.java,NONE,1.1 CatmullRomSamplesFilter.java,NONE,1.1 BoxSamplesFilter.java,NONE,1.1

[<ma...@us...>]

Update of /cvsroot/jrman/drafts/src/org/jrman/util
In directory sc8-pr-cvs1:/tmp/cvs-serv7530/src/org/jrman/util

Added Files:
	TriangleSamplesFilter.java SincSamplesFilter.java 
	CatmullRomSamplesFilter.java BoxSamplesFilter.java 
Log Message:
Implemented PixelFilters.

--- NEW FILE: TriangleSamplesFilter.java ---
/*
 TriangleSamplesFilter.java
 Copyright (C) 2003 Gerardo Horvilleur Martinez

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

package org.jrman.util;

public class TriangleSamplesFilter extends SamplesFilter {

    protected float filterFunc(float x, float y, float xWidth, float yWidth) {
        return ((1f - Math.abs(x)) / (xWidth * .5f)) * ((1f - Math.abs(y)) / (yWidth * .5f));
    }

}

--- NEW FILE: SincSamplesFilter.java ---
/*
 SincSamplesFilter.java
 Copyright (C) 2003 Gerardo Horvilleur Martinez

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

package org.jrman.util;

public class SincSamplesFilter extends SamplesFilter {

    protected float filterFunc(float x, float y, float xWidth, float yWidth) {
        float s;
        float t;
        if (x > -0.001f && x < 0.001f)
            s = 1f;
        else
            s = (float) Math.sin(x) / x;
        if (y > -0.001f && y < 0.001f)
            t = 1f;
        else
            t = (float) Math.sin(y) / y;
       return s * t;
    }

}

--- NEW FILE: CatmullRomSamplesFilter.java ---
/*
 CatmullRomSamplesFilter.java
 Copyright (C) 2003 Gerardo Horvilleur Martinez

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

package org.jrman.util;

public class CatmullRomSamplesFilter extends SamplesFilter {

    protected float filterFunc(float x, float y, float xWidth, float yWidth) {
        float r2 = (x * x + y * y);
        float r = (float) Math.sqrt(r2);
        return (r >= 2f) ? 0f : (r < 1f) ? (3f * r * r2 - 5f * r2 + 2f) : (-r * r2 + 5f * r2 - 8f * r + 4);
    }

}

--- NEW FILE: BoxSamplesFilter.java ---
/*
 BoxSamplesFilter.java
 Copyright (C) 2003 Gerardo Horvilleur Martinez

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

package org.jrman.util;

public class BoxSamplesFilter extends SamplesFilter {

    protected float filterFunc(float x, float y, float xWidth, float yWidth) {
        return 1f;
    }

}