Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 201 insertions, 0 deletions

diff --git a/Source/WebCore/platform/graphics/FloatRect.cpp b/Source/WebCore/platform/graphics/FloatRect.cpp
new file mode 100644
index 0000000..0d8a24e
--- /dev/null
+++ b/Source/WebCore/platform/graphics/FloatRect.cpp
@@ -0,0 +1,201 @@
+/*
+ * Copyright (C) 2003, 2006, 2007 Apple Inc.  All rights reserved.
+ * Copyright (C) 2005 Nokia.  All rights reserved.
+ *
+ * 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 "FloatRect.h"
+
+#include "FloatConversion.h"
+#include "IntRect.h"
+#include <algorithm>
+#include <limits>
+#include <math.h>
+
+using std::max;
+using std::min;
+
+namespace WebCore {
+
+FloatRect::FloatRect(const IntRect& r) : m_location(r.location()), m_size(r.size())
+{
+}
+
+FloatRect FloatRect::narrowPrecision(double x, double y, double width, double height)
+{
+    return FloatRect(narrowPrecisionToFloat(x), narrowPrecisionToFloat(y), narrowPrecisionToFloat(width), narrowPrecisionToFloat(height));
+}
+
+bool FloatRect::intersects(const FloatRect& other) const
+{
+    // Checking emptiness handles negative widths as well as zero.
+    return !isEmpty() && !other.isEmpty()
+        && x() < other.right() && other.x() < right()
+        && y() < other.bottom() && other.y() < bottom();
+}
+
+bool FloatRect::contains(const FloatRect& other) const
+{
+    return x() <= other.x() && right() >= other.right()
+        && y() <= other.y() && bottom() >= other.bottom();
+}
+
+void FloatRect::intersect(const FloatRect& other)
+{
+    float l = max(x(), other.x());
+    float t = max(y(), other.y());
+    float r = min(right(), other.right());
+    float b = min(bottom(), other.bottom());
+
+    // Return a clean empty rectangle for non-intersecting cases.
+    if (l >= r || t >= b) {
+        l = 0;
+        t = 0;
+        r = 0;
+        b = 0;
+    }
+
+    setLocationAndSizeFromEdges(l, t, r, b);
+}
+
+void FloatRect::unite(const FloatRect& other)
+{
+    // Handle empty special cases first.
+    if (other.isEmpty())
+        return;
+    if (isEmpty()) {
+        *this = other;
+        return;
+    }
+
+    float l = min(x(), other.x());
+    float t = min(y(), other.y());
+    float r = max(right(), other.right());
+    float b = max(bottom(), other.bottom());
+
+    setLocationAndSizeFromEdges(l, t, r, b);
+}
+
+void FloatRect::scale(float sx, float sy)
+{
+    m_location.setX(x() * sx);
+    m_location.setY(y() * sy);
+    m_size.setWidth(width() * sx);
+    m_size.setHeight(height() * sy);
+}
+
+void FloatRect::fitToPoints(const FloatPoint& p0, const FloatPoint& p1)
+{
+    float left = min(p0.x(), p1.x());
+    float top = min(p0.y(), p1.y());
+    float right = max(p0.x(), p1.x());
+    float bottom = max(p0.y(), p1.y());
+
+    setLocationAndSizeFromEdges(left, top, right, bottom);
+}
+
+namespace {
+// Helpers for 3- and 4-way max and min.
+
+template <typename T>
+T min3(const T& v1, const T& v2, const T& v3)
+{
+    return min(min(v1, v2), v3);
+}
+
+template <typename T>
+T max3(const T& v1, const T& v2, const T& v3)
+{
+    return max(max(v1, v2), v3);
+}
+
+template <typename T>
+T min4(const T& v1, const T& v2, const T& v3, const T& v4)
+{
+    return min(min(v1, v2), min(v3, v4));
+}
+
+template <typename T>
+T max4(const T& v1, const T& v2, const T& v3, const T& v4)
+{
+    return max(max(v1, v2), max(v3, v4));
+}
+
+} // anonymous namespace
+
+void FloatRect::fitToPoints(const FloatPoint& p0, const FloatPoint& p1, const FloatPoint& p2)
+{
+    float left = min3(p0.x(), p1.x(), p2.x());
+    float top = min3(p0.y(), p1.y(), p2.y());
+    float right = max3(p0.x(), p1.x(), p2.x());
+    float bottom = max3(p0.y(), p1.y(), p2.y());
+
+    setLocationAndSizeFromEdges(left, top, right, bottom);
+}
+
+void FloatRect::fitToPoints(const FloatPoint& p0, const FloatPoint& p1, const FloatPoint& p2, const FloatPoint& p3)
+{
+    float left = min4(p0.x(), p1.x(), p2.x(), p3.x());
+    float top = min4(p0.y(), p1.y(), p2.y(), p3.y());
+    float right = max4(p0.x(), p1.x(), p2.x(), p3.x());
+    float bottom = max4(p0.y(), p1.y(), p2.y(), p3.y());
+
+    setLocationAndSizeFromEdges(left, top, right, bottom);
+}
+
+static inline int safeFloatToInt(float x)
+{
+    static const int s_intMax = std::numeric_limits<int>::max();
+    static const int s_intMin = std::numeric_limits<int>::min();
+
+    if (x >= static_cast<float>(s_intMax))
+        return s_intMax;
+    if (x < static_cast<float>(s_intMin))
+        return s_intMin;
+    return static_cast<int>(x);
+}
+
+IntRect enclosingIntRect(const FloatRect& rect)
+{
+    float left = floorf(rect.x());
+    float top = floorf(rect.y());
+    float width = ceilf(rect.right()) - left;
+    float height = ceilf(rect.bottom()) - top;
+    return IntRect(safeFloatToInt(left), safeFloatToInt(top), 
+                   safeFloatToInt(width), safeFloatToInt(height));
+}
+
+FloatRect mapRect(const FloatRect& r, const FloatRect& srcRect, const FloatRect& destRect)
+{
+    if (srcRect.width() == 0 || srcRect.height() == 0)
+        return FloatRect();
+
+    float widthScale = destRect.width() / srcRect.width();
+    float heightScale = destRect.height() / srcRect.height();
+    return FloatRect(destRect.x() + (r.x() - srcRect.x()) * widthScale,
+                     destRect.y() + (r.y() - srcRect.y()) * heightScale,
+                     r.width() * widthScale, r.height() * heightScale);
+}
+
+}