/*

 * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.

 * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies)

 * Copyright (C) 2007 Alp Toker <alp@atoker.com>

 * Copyright (C) 2008 Eric Seidel <eric@webkit.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"

#include "CanvasStyle.h"

#include "CSSParser.h"

#include "CanvasGradient.h"

#include "CanvasPattern.h"

#include "GraphicsContext.h"

#include <wtf/Assertions.h>

#include <wtf/PassRefPtr.h>

#if PLATFORM(CG)

#include <CoreGraphics/CGContext.h>

#endif

#if PLATFORM(QT)

#include <QPainter>

#include <QBrush>

#include <QPen>

#include <QColor>

#endif

namespace WebCore {

CanvasStyle::CanvasStyle(RGBA32 rgba)

    : m_type(RGBA)

    , m_rgba(rgba)

{

}

CanvasStyle::CanvasStyle(float grayLevel)

    : m_type(RGBA)

    , m_rgba(makeRGBA32FromFloats(grayLevel, grayLevel, grayLevel, 1.0f))

{

}

CanvasStyle::CanvasStyle(float grayLevel, float alpha)

    : m_type(RGBA)

    , m_rgba(makeRGBA32FromFloats(grayLevel, grayLevel, grayLevel, alpha))

{

}

CanvasStyle::CanvasStyle(float r, float g, float b, float a)

    : m_type(RGBA)

    , m_rgba(makeRGBA32FromFloats(r, g, b, a))

{

}

CanvasStyle::CanvasStyle(float c, float m, float y, float k, float a)

    : m_type(CMYKA)

    , m_rgba(makeRGBAFromCMYKA(c, m, y, k, a))

    , m_cmyka(c, m, y, k, a)

{

}

CanvasStyle::CanvasStyle(PassRefPtr<CanvasGradient> gradient)

    : m_type(Gradient)

    , m_gradient(gradient)

{

}

CanvasStyle::CanvasStyle(PassRefPtr<CanvasPattern> pattern)

    : m_type(ImagePattern)

    , m_pattern(pattern)

{

}

PassRefPtr<CanvasStyle> CanvasStyle::create(const String& color)

{

    RGBA32 rgba;

    if (!CSSParser::parseColor(rgba, color))

        return 0;

    return adoptRef(new CanvasStyle(rgba));

}

PassRefPtr<CanvasStyle> CanvasStyle::create(const String& color, float alpha)

{

    RGBA32 rgba;

    if (!CSSParser::parseColor(rgba, color))

        return 0;

    return adoptRef(new CanvasStyle(colorWithOverrideAlpha(rgba, alpha)));

}

PassRefPtr<CanvasStyle> CanvasStyle::create(PassRefPtr<CanvasGradient> gradient)

{

    if (!gradient)

        return 0;

    return adoptRef(new CanvasStyle(gradient));

}

PassRefPtr<CanvasStyle> CanvasStyle::create(PassRefPtr<CanvasPattern> pattern)

{

    if (!pattern)

        return 0;

    return adoptRef(new CanvasStyle(pattern));

}

bool CanvasStyle::isEquivalentColor(const CanvasStyle& other) const

{

    if (m_type != other.m_type)

        return false;

    switch (m_type) {

    case CanvasStyle::RGBA:

        return m_rgba == other.m_rgba;

    case CanvasStyle::CMYKA:

        return m_cmyka.c == other.m_cmyka.c

            && m_cmyka.m == other.m_cmyka.m

            && m_cmyka.y == other.m_cmyka.y

            && m_cmyka.k == other.m_cmyka.k

            && m_cmyka.a == other.m_cmyka.a;

    case CanvasStyle::Gradient:

    case CanvasStyle::ImagePattern:

        return false;

    }

    ASSERT_NOT_REACHED();

    return false;

}

void CanvasStyle::applyStrokeColor(GraphicsContext* context)

{

    if (!context)

        return;

    switch (m_type) {

    case RGBA:

        context->setStrokeColor(m_rgba, DeviceColorSpace);

        break;

    case CMYKA: {

        // FIXME: Do this through platform-independent GraphicsContext API.

        // We'll need a fancier Color abstraction to support CMYKA correctly

#if PLATFORM(CG)

        CGContextSetCMYKStrokeColor(context->platformContext(), m_cmyka.c, m_cmyka.m, m_cmyka.y, m_cmyka.k, m_cmyka.a);

#elif PLATFORM(QT)

        QPen currentPen = context->platformContext()->pen();

        QColor clr;

        clr.setCmykF(m_cmyka.c, m_cmyka.m, m_cmyka.y, m_cmyka.k, m_cmyka.a);

        currentPen.setColor(clr);

        context->platformContext()->setPen(currentPen);

#else

        context->setStrokeColor(m_rgba, DeviceColorSpace);

#endif

        break;

    }

    case Gradient:

        context->setStrokeGradient(canvasGradient()->gradient());

        break;

    case ImagePattern:

        context->setStrokePattern(canvasPattern()->pattern());

        break;

    }

}

void CanvasStyle::applyFillColor(GraphicsContext* context)

{

    if (!context)

        return;

    switch (m_type) {

    case RGBA:

        context->setFillColor(m_rgba, DeviceColorSpace);

        break;

    case CMYKA: {

        // FIXME: Do this through platform-independent GraphicsContext API.

        // We'll need a fancier Color abstraction to support CMYKA correctly

#if PLATFORM(CG)

        CGContextSetCMYKFillColor(context->platformContext(), m_cmyka.c, m_cmyka.m, m_cmyka.y, m_cmyka.k, m_cmyka.a);

#elif PLATFORM(QT)

        QBrush currentBrush = context->platformContext()->brush();

        QColor clr;

        clr.setCmykF(m_cmyka.c, m_cmyka.m, m_cmyka.y, m_cmyka.k, m_cmyka.a);

        currentBrush.setColor(clr);

        context->platformContext()->setBrush(currentBrush);

#else

        context->setFillColor(m_rgba, DeviceColorSpace);

#endif

        break;

    }

    case Gradient:

        context->setFillGradient(canvasGradient()->gradient());

        break;

    case ImagePattern:

        context->setFillPattern(canvasPattern()->pattern());

        break;

    }

}

}