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Diffstat (limited to 'Source/WebCore/svg/SVGTransformValue.cpp')
| -rw-r--r-- | Source/WebCore/svg/SVGTransformValue.cpp | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/Source/WebCore/svg/SVGTransformValue.cpp b/Source/WebCore/svg/SVGTransformValue.cpp new file mode 100644 index 000000000..4f94fe498 --- /dev/null +++ b/Source/WebCore/svg/SVGTransformValue.cpp @@ -0,0 +1,235 @@ +/* + * 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" +#include "SVGTransformValue.h" + +#include "FloatConversion.h" +#include "FloatPoint.h" +#include "FloatSize.h" +#include <wtf/MathExtras.h> +#include <wtf/NeverDestroyed.h> +#include <wtf/text/StringBuilder.h> +#include <wtf/text/WTFString.h> + +namespace WebCore { + +SVGTransformValue::SVGTransformValue() +{ +} + +SVGTransformValue::SVGTransformValue(SVGTransformType type, ConstructionMode mode) + : m_type(type) +{ + if (mode == ConstructZeroTransform) + m_matrix = AffineTransform(0, 0, 0, 0, 0, 0); +} + +SVGTransformValue::SVGTransformValue(const AffineTransform& matrix) + : m_type(SVG_TRANSFORM_MATRIX) + , m_matrix(matrix) +{ +} + +void SVGTransformValue::setMatrix(const AffineTransform& matrix) +{ + m_type = SVG_TRANSFORM_MATRIX; + m_angle = 0; + m_matrix = matrix; +} + +void SVGTransformValue::updateSVGMatrix() +{ + // 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 SVGTransformValue::setTranslate(float tx, float ty) +{ + m_type = SVG_TRANSFORM_TRANSLATE; + m_angle = 0; + + m_matrix.makeIdentity(); + m_matrix.translate(tx, ty); +} + +FloatPoint SVGTransformValue::translate() const +{ + return FloatPoint::narrowPrecision(m_matrix.e(), m_matrix.f()); +} + +void SVGTransformValue::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 SVGTransformValue::scale() const +{ + return FloatSize::narrowPrecision(m_matrix.a(), m_matrix.d()); +} + +void SVGTransformValue::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 SVGTransformValue::setSkewX(float angle) +{ + m_type = SVG_TRANSFORM_SKEWX; + m_angle = angle; + + m_matrix.makeIdentity(); + m_matrix.skewX(angle); +} + +void SVGTransformValue::setSkewY(float angle) +{ + m_type = SVG_TRANSFORM_SKEWY; + m_angle = angle; + + m_matrix.makeIdentity(); + m_matrix.skewY(angle); +} + +const String& SVGTransformValue::transformTypePrefixForParsing(SVGTransformType type) +{ + switch (type) { + case SVG_TRANSFORM_UNKNOWN: + return emptyString(); + case SVG_TRANSFORM_MATRIX: { + static NeverDestroyed<String> matrixString(ASCIILiteral("matrix(")); + return matrixString; + } + case SVG_TRANSFORM_TRANSLATE: { + static NeverDestroyed<String> translateString(ASCIILiteral("translate(")); + return translateString; + } + case SVG_TRANSFORM_SCALE: { + static NeverDestroyed<String> scaleString(ASCIILiteral("scale(")); + return scaleString; + } + case SVG_TRANSFORM_ROTATE: { + static NeverDestroyed<String> rotateString(ASCIILiteral("rotate(")); + return rotateString; + } + case SVG_TRANSFORM_SKEWX: { + static NeverDestroyed<String> skewXString(ASCIILiteral("skewX(")); + return skewXString; + } + case SVG_TRANSFORM_SKEWY: { + static NeverDestroyed<String> skewYString(ASCIILiteral("skewY(")); + return skewYString; + } + } + + ASSERT_NOT_REACHED(); + return emptyString(); +} + +String SVGTransformValue::valueAsString() const +{ + const String& prefix = transformTypePrefixForParsing(m_type); + switch (m_type) { + case SVG_TRANSFORM_UNKNOWN: + return prefix; + case SVG_TRANSFORM_MATRIX: { + StringBuilder builder; + builder.append(prefix); + builder.appendNumber(m_matrix.a()); + builder.append(' '); + builder.appendNumber(m_matrix.b()); + builder.append(' '); + builder.appendNumber(m_matrix.c()); + builder.append(' '); + builder.appendNumber(m_matrix.d()); + builder.append(' '); + builder.appendNumber(m_matrix.e()); + builder.append(' '); + builder.appendNumber(m_matrix.f()); + builder.append(')'); + return builder.toString(); + } + case SVG_TRANSFORM_TRANSLATE: { + StringBuilder builder; + builder.append(prefix); + builder.appendNumber(m_matrix.e()); + builder.append(' '); + builder.appendNumber(m_matrix.f()); + builder.append(')'); + return builder.toString(); + } + case SVG_TRANSFORM_SCALE: { + StringBuilder builder; + builder.append(prefix); + builder.appendNumber(m_matrix.xScale()); + builder.append(' '); + builder.appendNumber(m_matrix.yScale()); + builder.append(')'); + return builder.toString(); + } + case SVG_TRANSFORM_ROTATE: { + double angleInRad = deg2rad(m_angle); + double cosAngle = std::cos(angleInRad); + double sinAngle = std::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); + StringBuilder builder; + builder.append(prefix); + builder.appendNumber(m_angle); + if (cx || cy) { + builder.append(' '); + builder.appendNumber(cx); + builder.append(' '); + builder.appendNumber(cy); + } + builder.append(')'); + return builder.toString(); + } + case SVG_TRANSFORM_SKEWX: + case SVG_TRANSFORM_SKEWY: { + StringBuilder builder; + builder.append(prefix); + builder.appendNumber(m_angle); + builder.append(')'); + return builder.toString(); + } + } + + ASSERT_NOT_REACHED(); + return emptyString(); +} + +} // namespace WebCore |