1 files changed, 119 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/qt/GradientQt.cpp b/Source/WebCore/platform/graphics/qt/GradientQt.cpp
new file mode 100644
index 0000000..72bb009
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+++ b/Source/WebCore/platform/graphics/qt/GradientQt.cpp
@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2006, 2007, 2008 Apple Computer, Inc.  All rights reserved.
+ * Copyright (C) 2007 Alp Toker <alp@atoker.com>
+ *
+ * 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 "Gradient.h"
+
+#include "CSSParser.h"
+#include "GraphicsContext.h"
+
+#include <QGradient>
+#include <QPainter>
+
+namespace WebCore {
+
+void Gradient::platformDestroy()
+{
+    delete m_gradient;
+    m_gradient = 0;
+}
+
+QGradient* Gradient::platformGradient()
+{
+    if (m_gradient)
+        return m_gradient;
+
+    bool reversed = m_r0 > m_r1;
+
+    qreal innerRadius = reversed ? m_r1 : m_r0;
+    qreal outerRadius = reversed ? m_r0 : m_r1;
+    QPointF center = reversed ? m_p0 : m_p1;
+    QPointF focalPoint = reversed ? m_p1 : m_p0;
+
+    if (m_radial)
+        m_gradient = new QRadialGradient(center, outerRadius, focalPoint);
+    else
+        m_gradient = new QLinearGradient(m_p0.x(), m_p0.y(), m_p1.x(), m_p1.y());
+
+    m_gradient->setInterpolationMode(QGradient::ComponentInterpolation);
+
+    sortStopsIfNecessary();
+
+    QColor stopColor;
+    Vector<ColorStop>::iterator stopIterator = m_stops.begin();
+    qreal lastStop(0.0);
+    const qreal lastStopDiff = 0.0000001;
+    while (stopIterator != m_stops.end()) {
+        stopColor.setRgbF(stopIterator->red, stopIterator->green, stopIterator->blue, stopIterator->alpha);
+        if (qFuzzyCompare(lastStop, qreal(stopIterator->stop)))
+            lastStop = stopIterator->stop + lastStopDiff;
+        else
+            lastStop = stopIterator->stop;
+
+        if (m_radial && !qFuzzyCompare(1 + outerRadius, qreal(1))) {
+            lastStop = lastStop * (1.0f - innerRadius / outerRadius);
+            if (!reversed)
+                lastStop += innerRadius / outerRadius;
+        }
+
+        qreal stopPosition = qMin(lastStop, qreal(1.0f));
+
+        if (m_radial && reversed)
+            stopPosition = 1 - stopPosition;
+
+        m_gradient->setColorAt(stopPosition, stopColor);
+        // Keep the lastStop as orginal value, since the following stopColor depend it
+        lastStop = stopIterator->stop;
+        ++stopIterator;
+    }
+
+    if (m_stops.isEmpty()) {
+        // The behavior of QGradient with no stops is defined differently from HTML5 spec,
+        // where the latter requires the gradient to be transparent black.
+        m_gradient->setColorAt(0.0, QColor(0, 0, 0, 0));
+    }
+
+    switch (m_spreadMethod) {
+    case SpreadMethodPad:
+        m_gradient->setSpread(QGradient::PadSpread);
+        break;
+    case SpreadMethodReflect:
+        m_gradient->setSpread(QGradient::ReflectSpread);
+        break;
+    case SpreadMethodRepeat:
+        m_gradient->setSpread(QGradient::RepeatSpread);
+        break;
+    }
+
+    return m_gradient;
+}
+
+void Gradient::fill(GraphicsContext* context, const FloatRect& rect)
+{
+    context->platformContext()->fillRect(rect, *platformGradient());
+}
+
+} //namespace