Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 169 insertions, 0 deletions

diff --git a/Source/WebCore/svg/SVGTransform.cpp b/Source/WebCore/svg/SVGTransform.cpp
new file mode 100644
index 0000000..4878b57
--- /dev/null
+++ b/Source/WebCore/svg/SVGTransform.cpp
@@ -0,0 +1,169 @@
+/*
+ * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
+ * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include "config.h"
+
+#if ENABLE(SVG)
+#include "SVGTransform.h"
+
+#include "FloatConversion.h"
+#include "FloatPoint.h"
+#include "FloatSize.h"
+#include "SVGAngle.h"
+#include "SVGSVGElement.h"
+#include <wtf/MathExtras.h>
+#include <wtf/text/StringBuilder.h>
+#include <wtf/text/StringConcatenate.h>
+
+namespace WebCore {
+
+SVGTransform::SVGTransform()
+    : m_type(SVG_TRANSFORM_UNKNOWN)
+    , m_angle(0)
+{
+}
+
+SVGTransform::SVGTransform(SVGTransformType type)
+    : m_type(type)
+    , m_angle(0)
+{
+}
+
+SVGTransform::SVGTransform(const AffineTransform& matrix)
+    : m_type(SVG_TRANSFORM_MATRIX)
+    , m_angle(0)
+    , m_matrix(matrix)
+{
+}
+
+void SVGTransform::setMatrix(const AffineTransform& matrix)
+{
+    m_type = SVG_TRANSFORM_MATRIX;
+    m_angle = 0;
+    m_matrix = matrix;
+}
+
+void SVGTransform::updateMatrix()
+{
+    // The underlying matrix has been changed, alter the transformation type.
+    // Spec: In case the matrix object is changed directly (i.e., without using the methods on the SVGTransform interface itself)
+    // then the type of the SVGTransform changes to SVG_TRANSFORM_MATRIX.
+    m_type = SVG_TRANSFORM_MATRIX;
+    m_angle = 0;
+}
+
+void SVGTransform::setTranslate(float tx, float ty)
+{
+    m_type = SVG_TRANSFORM_TRANSLATE;
+    m_angle = 0;
+
+    m_matrix.makeIdentity();
+    m_matrix.translate(tx, ty);
+}
+
+FloatPoint SVGTransform::translate() const
+{
+    return FloatPoint::narrowPrecision(m_matrix.e(), m_matrix.f());
+}
+
+void SVGTransform::setScale(float sx, float sy)
+{
+    m_type = SVG_TRANSFORM_SCALE;
+    m_angle = 0;
+    m_center = FloatPoint();
+
+    m_matrix.makeIdentity();
+    m_matrix.scaleNonUniform(sx, sy);
+}
+
+FloatSize SVGTransform::scale() const
+{
+    return FloatSize::narrowPrecision(m_matrix.a(), m_matrix.d());
+}
+
+void SVGTransform::setRotate(float angle, float cx, float cy)
+{
+    m_type = SVG_TRANSFORM_ROTATE;
+    m_angle = angle;
+    m_center = FloatPoint(cx, cy);
+
+    // TODO: toString() implementation, which can show cx, cy (need to be stored?)
+    m_matrix.makeIdentity();
+    m_matrix.translate(cx, cy);
+    m_matrix.rotate(angle);
+    m_matrix.translate(-cx, -cy);
+}
+
+void SVGTransform::setSkewX(float angle)
+{
+    m_type = SVG_TRANSFORM_SKEWX;
+    m_angle = angle;
+
+    m_matrix.makeIdentity();
+    m_matrix.skewX(angle);
+}
+
+void SVGTransform::setSkewY(float angle)
+{
+    m_type = SVG_TRANSFORM_SKEWY;
+    m_angle = angle;
+
+    m_matrix.makeIdentity();
+    m_matrix.skewY(angle);
+}
+
+String SVGTransform::valueAsString() const
+{
+    switch (m_type) {
+    case SVG_TRANSFORM_UNKNOWN:
+        return String();
+    case SVG_TRANSFORM_MATRIX: {
+        StringBuilder builder;
+        builder.append(makeString("matrix(", String::number(m_matrix.a()), ' ', String::number(m_matrix.b()), ' ', String::number(m_matrix.c()), ' '));
+        builder.append(makeString(String::number(m_matrix.d()), ' ', String::number(m_matrix.e()), ' ', String::number(m_matrix.f()), ')'));
+        return builder.toString();
+    }
+    case SVG_TRANSFORM_TRANSLATE:
+        return makeString("translate(", String::number(m_matrix.e()), ' ', String::number(m_matrix.f()), ')');
+    case SVG_TRANSFORM_SCALE:
+        return makeString("scale(", String::number(m_matrix.xScale()), ' ', String::number(m_matrix.yScale()), ')');
+    case SVG_TRANSFORM_ROTATE: {
+        double angleInRad = deg2rad(m_angle);
+        double cosAngle = cos(angleInRad);
+        double sinAngle = sin(angleInRad);
+        float cx = narrowPrecisionToFloat(cosAngle != 1 ? (m_matrix.e() * (1 - cosAngle) - m_matrix.f() * sinAngle) / (1 - cosAngle) / 2 : 0);
+        float cy = narrowPrecisionToFloat(cosAngle != 1 ? (m_matrix.e() * sinAngle / (1 - cosAngle) + m_matrix.f()) / 2 : 0);
+        if (cx || cy)
+            return makeString("rotate(", String::number(m_angle), ' ', String::number(cx), ' ', String::number(cy), ')');
+        return makeString("rotate(", String::number(m_angle), ')');
+    }    
+    case SVG_TRANSFORM_SKEWX:
+        return makeString("skewX(", String::number(m_angle), ')');
+    case SVG_TRANSFORM_SKEWY:
+        return makeString("skewY(", String::number(m_angle), ')');
+    }
+
+    ASSERT_NOT_REACHED();
+    return String();
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(SVG)