SVGTransform SVGTransformDistance::addSVGTransforms(const SVGTransform& first, const SVGTransform& second)
{
ASSERT(first.type() == second.type());
SVGTransform transform;
switch (first.type()) {
case SVGTransform::SVG_TRANSFORM_UNKNOWN:
return SVGTransform();
case SVGTransform::SVG_TRANSFORM_ROTATE:
{
transform.setRotate(first.angle() + second.angle(), first.rotationCenter().x() + second.rotationCenter().x(),
first.rotationCenter().y() + second.rotationCenter().y());
return transform;
}
case SVGTransform::SVG_TRANSFORM_MATRIX:
transform.setMatrix(first.matrix() * second.matrix());
return transform;
case SVGTransform::SVG_TRANSFORM_TRANSLATE:
{
float dx = first.translate().x() + second.translate().x();
float dy = first.translate().y() + second.translate().y();
transform.setTranslate(dx, dy);
return transform;
}
case SVGTransform::SVG_TRANSFORM_SCALE:
{
FloatSize scale = first.scale() + second.scale();
transform.setScale(scale.width(), scale.height());
return transform;
}
case SVGTransform::SVG_TRANSFORM_SKEWX:
transform.setSkewX(first.angle() + second.angle());
return transform;
case SVGTransform::SVG_TRANSFORM_SKEWY:
transform.setSkewY(first.angle() + second.angle());
return transform;
}
ASSERT_NOT_REACHED();
return SVGTransform();
}
String SVGTransformList::valueAsString() const
{
// TODO: We may want to build a real transform string, instead of concatting to a matrix(...).
SVGTransform transform = concatenate();
if (transform.type() == SVGTransform::SVG_TRANSFORM_MATRIX) {
TransformationMatrix matrix = transform.matrix();
return String::format("matrix(%f %f %f %f %f %f)", matrix.a(), matrix.b(), matrix.c(), matrix.d(), matrix.e(), matrix.f());
}
return String();
}
SVGTransform SVGTransformDistance::addToSVGTransform(const SVGTransform& transform) const
{
ASSERT(m_type == transform.type() || transform == SVGTransform());
SVGTransform newTransform(transform);
switch (m_type) {
case SVGTransform::SVG_TRANSFORM_UNKNOWN:
return SVGTransform();
case SVGTransform::SVG_TRANSFORM_MATRIX:
return SVGTransform(transform.matrix() * m_transform);
case SVGTransform::SVG_TRANSFORM_TRANSLATE:
{
FloatPoint translation = transform.translate();
translation += FloatSize::narrowPrecision(m_transform.e(), m_transform.f());
newTransform.setTranslate(translation.x(), translation.y());
return newTransform;
}
case SVGTransform::SVG_TRANSFORM_SCALE:
{
FloatSize scale = transform.scale();
scale += FloatSize::narrowPrecision(m_transform.a(), m_transform.d());
newTransform.setScale(scale.width(), scale.height());
return newTransform;
}
case SVGTransform::SVG_TRANSFORM_ROTATE:
{
// FIXME: I'm not certain the translation is calculated correctly here
FloatPoint center = transform.rotationCenter();
newTransform.setRotate(transform.angle() + m_angle,
center.x() + m_cx,
center.y() + m_cy);
return newTransform;
}
case SVGTransform::SVG_TRANSFORM_SKEWX:
newTransform.setSkewX(transform.angle() + m_angle);
return newTransform;
case SVGTransform::SVG_TRANSFORM_SKEWY:
newTransform.setSkewY(transform.angle() + m_angle);
return newTransform;
}
ASSERT_NOT_REACHED();
return SVGTransform();
}
void SVGTransformDistance::addSVGTransform(const SVGTransform& transform, bool absoluteValue)
{
// If this is the first add, set the type for this SVGTransformDistance
if (m_type == SVGTransform::SVG_TRANSFORM_UNKNOWN)
m_type = transform.type();
ASSERT(m_type == transform.type());
switch (m_type) {
case SVGTransform::SVG_TRANSFORM_UNKNOWN:
return;
case SVGTransform::SVG_TRANSFORM_MATRIX:
m_transform *= transform.matrix(); // FIXME: what does 'distance' between two transforms mean? how should we respect 'absoluteValue' here?
return;
case SVGTransform::SVG_TRANSFORM_ROTATE:
m_angle += absoluteValue ? fabsf(transform.angle()) : transform.angle();
m_cx += absoluteValue ? fabsf(transform.rotationCenter().x()) : transform.rotationCenter().x();
m_cy += absoluteValue ? fabsf(transform.rotationCenter().y()) : transform.rotationCenter().y();
// fall through
case SVGTransform::SVG_TRANSFORM_TRANSLATE:
{
float dx = absoluteValue ? fabsf(transform.translate().x()) : transform.translate().x();
float dy = absoluteValue ? fabsf(transform.translate().y()) : transform.translate().y();
m_transform.translate(dx, dy);
return;
}
case SVGTransform::SVG_TRANSFORM_SCALE:
{
float scaleX = absoluteValue ? fabsf(transform.scale().width()) : transform.scale().width();
float scaleY = absoluteValue ? fabsf(transform.scale().height()) : transform.scale().height();
m_transform.scaleNonUniform(scaleX, scaleY);
return;
}
case SVGTransform::SVG_TRANSFORM_SKEWX:
case SVGTransform::SVG_TRANSFORM_SKEWY:
m_angle += absoluteValue ? fabsf(transform.angle()) : transform.angle();
return;
}
ASSERT_NOT_REACHED();
return;
}