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diff --git a/Source/WebCore/html/canvas/CanvasStyle.cpp b/Source/WebCore/html/canvas/CanvasStyle.cpp
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+++ b/Source/WebCore/html/canvas/CanvasStyle.cpp
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+/*
+ * 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 "CSSPropertyNames.h"
+#include "CanvasGradient.h"
+#include "CanvasPattern.h"
+#include "GraphicsContext.h"
+#include "HTMLCanvasElement.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 {
+
+enum ColorParseResult { ParsedRGBA, ParsedCurrentColor, ParseFailed };
+
+static ColorParseResult parseColor(RGBA32& parsedColor, const String& colorString)
+{
+    if (equalIgnoringCase(colorString, "currentcolor"))
+        return ParsedCurrentColor;
+    if (CSSParser::parseColor(parsedColor, colorString))
+        return ParsedRGBA;
+    return ParseFailed;
+}
+
+RGBA32 currentColor(HTMLCanvasElement* canvas)
+{
+    if (!canvas || !canvas->inDocument())
+        return Color::black;
+    RGBA32 rgba = Color::black;
+    CSSParser::parseColor(rgba, canvas->style()->getPropertyValue(CSSPropertyColor));
+    return rgba;
+}
+
+bool parseColorOrCurrentColor(RGBA32& parsedColor, const String& colorString, HTMLCanvasElement* canvas)
+{
+    ColorParseResult parseResult = parseColor(parsedColor, colorString);
+    switch (parseResult) {
+    case ParsedRGBA:
+        return true;
+    case ParsedCurrentColor:
+        parsedColor = currentColor(canvas);
+        return true;
+    case ParseFailed:
+        return false;
+    default:
+        ASSERT_NOT_REACHED();
+        return false;
+    }
+}
+
+CanvasStyle::CanvasStyle(Type type, float overrideAlpha)
+    : m_type(type)
+    , m_overrideAlpha(overrideAlpha)
+{
+}
+
+CanvasStyle::CanvasStyle(RGBA32 rgba)
+    : m_type(RGBA)
+    , m_rgba(rgba)
+{
+}
+
+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::createFromString(const String& color)
+{
+    RGBA32 rgba;
+    ColorParseResult parseResult = parseColor(rgba, color);
+    switch (parseResult) {
+    case ParsedRGBA:
+        return adoptRef(new CanvasStyle(rgba));
+    case ParsedCurrentColor:
+        return adoptRef(new CanvasStyle(CurrentColor));
+    case ParseFailed:
+        return 0;
+    default:
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+}
+
+PassRefPtr<CanvasStyle> CanvasStyle::createFromStringWithOverrideAlpha(const String& color, float alpha)
+{
+    RGBA32 rgba;
+    ColorParseResult parseResult = parseColor(rgba, color);
+    switch (parseResult) {
+    case ParsedRGBA:
+        return adoptRef(new CanvasStyle(colorWithOverrideAlpha(rgba, alpha)));
+    case ParsedCurrentColor:
+        return adoptRef(new CanvasStyle(CurrentColorWithOverrideAlpha, alpha));
+    case ParseFailed:
+        return 0;
+    default:
+        ASSERT_NOT_REACHED();
+        return 0;
+    }
+}
+
+PassRefPtr<CanvasStyle> CanvasStyle::createFromGradient(PassRefPtr<CanvasGradient> gradient)
+{
+    if (!gradient)
+        return 0;
+    return adoptRef(new CanvasStyle(gradient));
+}
+PassRefPtr<CanvasStyle> CanvasStyle::createFromPattern(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 RGBA:
+        return m_rgba == other.m_rgba;
+    case 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 Gradient:
+    case ImagePattern:
+    case CurrentColor:
+    case CurrentColorWithOverrideAlpha:
+        return false;
+    }
+
+    ASSERT_NOT_REACHED();
+    return false;
+}
+
+bool CanvasStyle::isEquivalentRGBA(float r, float g, float b, float a) const
+{
+    if (m_type != RGBA)
+        return false;
+
+    return m_rgba == makeRGBA32FromFloats(r, g, b, a);
+}
+
+bool CanvasStyle::isEquivalentCMYKA(float c, float m, float y, float k, float a) const
+{
+    if (m_type != CMYKA)
+        return false;
+
+    return c == m_cmyka.c
+        && m == m_cmyka.m
+        && y == m_cmyka.y
+        && k == m_cmyka.k
+        && a == m_cmyka.a;
+}
+
+void CanvasStyle::applyStrokeColor(GraphicsContext* context)
+{
+    if (!context)
+        return;
+    switch (m_type) {
+    case RGBA:
+        context->setStrokeColor(m_rgba, ColorSpaceDeviceRGB);
+        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, ColorSpaceDeviceRGB);
+#endif
+        break;
+    }
+    case Gradient:
+        context->setStrokeGradient(canvasGradient()->gradient());
+        break;
+    case ImagePattern:
+        context->setStrokePattern(canvasPattern()->pattern());
+        break;
+    case CurrentColor:
+    case CurrentColorWithOverrideAlpha:
+        ASSERT_NOT_REACHED();
+        break;
+    }
+}
+
+void CanvasStyle::applyFillColor(GraphicsContext* context)
+{
+    if (!context)
+        return;
+    switch (m_type) {
+    case RGBA:
+        context->setFillColor(m_rgba, ColorSpaceDeviceRGB);
+        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, ColorSpaceDeviceRGB);
+#endif
+        break;
+    }
+    case Gradient:
+        context->setFillGradient(canvasGradient()->gradient());
+        break;
+    case ImagePattern:
+        context->setFillPattern(canvasPattern()->pattern());
+        break;
+    case CurrentColor:
+    case CurrentColorWithOverrideAlpha:
+        ASSERT_NOT_REACHED();
+        break;
+    }
+}
+
+}