/*

 * Copyright (C) 2005 Apple Computer, Inc.  All rights reserved.

 *               2006 Rob Buis <buis@kde.org>

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. 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.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. OR

 * CONTRIBUTORS 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. 

 */

#include "config.h"

#if ENABLE(SVG)

#include <ApplicationServices/ApplicationServices.h>

#include "CgSupport.h"

#include "FloatConversion.h"

#include "GraphicsContext.h"

#include "KCanvasRenderingStyle.h"

#include "RenderStyle.h"

#include "SVGRenderStyle.h"

#include <wtf/Assertions.h>

namespace WebCore {

CFStringRef CFStringFromCGAffineTransform(CGAffineTransform t)

{

    return CFStringCreateWithFormat(0, 0, CFSTR("a: %f b: %f c: %f d: %f tx: %f ty: %f"), t.a, t.b, t.c, t.d, t.tx, t.ty);

}

CGAffineTransform CGAffineTransformMakeMapBetweenRects(CGRect source, CGRect dest)

{

    CGAffineTransform transform = CGAffineTransformMakeTranslation(dest.origin.x - source.origin.x, dest.origin.y - source.origin.y);

    transform = CGAffineTransformScale(transform, dest.size.width/source.size.width, dest.size.height/source.size.height);

    return transform;

}

void applyStrokeStyleToContext(CGContextRef context, RenderStyle* style, const RenderObject* object)

{

    /* Shouldn't all these be in the stroke painter? */

    CGContextSetLineWidth(context, narrowPrecisionToCGFloat(KSVGPainterFactory::cssPrimitiveToLength(object, style->svgStyle()->strokeWidth(), 1.0)));

    CGContextSetLineCap(context, CGLineCapFromKC(style->svgStyle()->capStyle()));

    CGContextSetLineJoin(context, CGLineJoinFromKC(style->svgStyle()->joinStyle()));

    CGContextSetMiterLimit(context, style->svgStyle()->strokeMiterLimit());

    const KCDashArray& dashes = KSVGPainterFactory::dashArrayFromRenderingStyle(style);

    double dashOffset = KSVGPainterFactory::cssPrimitiveToLength(object, style->svgStyle()->strokeDashOffset(), 0.0);

    CGContextSetLineDash(context, narrowPrecisionToCGFloat(dashOffset), dashes.data(), dashes.size());

}

CGContextRef scratchContext()

{

    static CGContextRef scratch = 0;

    if (!scratch) {

        CFMutableDataRef empty = CFDataCreateMutable(NULL, 0);

        CGDataConsumerRef consumer = CGDataConsumerCreateWithCFData(empty);

        scratch = CGPDFContextCreate(consumer, NULL, NULL);

        CGDataConsumerRelease(consumer);

        CFRelease(empty);

        CGFloat black[4] = {0, 0, 0, 1};

        CGContextSetFillColor(scratch, black);

        CGContextSetStrokeColor(scratch, black);

     }

    return scratch;

}

FloatRect strokeBoundingBox(const Path& path, RenderStyle* style, const RenderObject* object)

 {

    // the bbox might grow if the path is stroked.

    // and CGPathGetBoundingBox doesn't support that, so we'll have

    // to make an alternative call...

    // FIXME: since this is mainly used to decide what to repaint,

    // perhaps it would be sufficien to just outset the fill bbox by

    // the stroke width - that should be way cheaper and simpler than

    // what we do here.

    CGPathRef cgPath = path.platformPath();

    CGContextRef context = scratchContext();

    CGContextSaveGState(context);

    CGContextBeginPath(context);

    CGContextAddPath(context, cgPath);

    applyStrokeStyleToContext(context, style, object);

    CGContextReplacePathWithStrokedPath(context);

    CGRect box = CGContextGetPathBoundingBox(context);

    CGContextRestoreGState(context);

    return FloatRect(box);

}

}

#endif // ENABLE(SVG)