/*

    Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>

    This file is part of the KDE project

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Library General Public

    License as published by the Free Software Foundation; either

    version 2 of the License, or (at your option) any later version.

    This library 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

    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License

    aint with this library; see the file COPYING.LIB.  If not, write to

    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

    Boston, MA 02110-1301, USA.

*/

#include "config.h"

#if ENABLE(SVG) && ENABLE(SVG_EXPERIMENTAL_FEATURES)

#include "SVGFEDiffuseLighting.h"

#include "SVGFEHelpersCg.h"

#import "WKDiffuseLightingFilter.h"

namespace WebCore {

CIFilter* SVGFEDiffuseLighting::getCIFilter(SVGResourceFilter* svgFilter) const

{

    const SVGLightSource* light = lightSource();

    if (!light)

        return nil;

    [WKDiffuseLightingFilter class];

    CIFilter* filter;

    BEGIN_BLOCK_OBJC_EXCEPTIONS;

    filter = [CIFilter filterWithName:@"WKDiffuseLighting"];

    if (!filter)

        return nil;

    [filter setDefaults];

    CIImage* inputImage = svgFilter->inputImage(this);

    FE_QUARTZ_CHECK_INPUT(inputImage);

    CIFilter* normals = getNormalMap(inputImage, surfaceScale());

    if (!normals)

        return nil;

    CIFilter* lightVectors = getLightVectors(normals, light, surfaceScale());

    if (!lightVectors)

        return nil;

    [filter setValue:[normals valueForKey:@"outputImage"] forKey:@"inputNormalMap"];

    [filter setValue:[lightVectors valueForKey:@"outputImage"] forKey:@"inputLightVectors"];

    [filter setValue:ciColor(lightingColor()) forKey:@"inputLightingColor"];

    [filter setValue:[NSNumber numberWithFloat:surfaceScale()] forKey:@"inputSurfaceScale"];

    [filter setValue:[NSNumber numberWithFloat:diffuseConstant()] forKey:@"inputDiffuseConstant"];

    [filter setValue:[NSNumber numberWithFloat:kernelUnitLengthX()] forKey:@"inputKernelUnitLengthX"];

    [filter setValue:[NSNumber numberWithFloat:kernelUnitLengthY()] forKey:@"inputKernelUnitLengthY"];

    FE_QUARTZ_OUTPUT_RETURN;

}

}

#endif // ENABLE(SVG) && ENABLE(SVG_EXPERIMENTAL_FEATURES)