SvgTransformScope::SvgTransformScope(clan::Canvas &canvas, const clan::Mat4f &transform, bool transform_active) : canvas(canvas), transform_active(transform_active)
{
old_transform = canvas.get_transform();
canvas.mult_transform(transform);
}
SvgTransformScope::SvgTransformScope(clan::Canvas &canvas, clan::DomElement &e) : canvas(canvas)
{
try
{
clan::Mat4d mat = clan::Mat4d::identity();
SvgAttributeReader transform(e, "transform");
while (!transform.is_end())
{
clan::Mat4d t;
if (transform.is_keyword("matrix"))
{
transform.get_keyword("matrix");
transform.get_operator("(");
t = clan::Mat4d::identity();
t.matrix[0] = transform.get_number();
t.matrix[1] = transform.get_number();
t.matrix[4] = transform.get_number();
t.matrix[5] = transform.get_number();
t.matrix[12] = transform.get_number();
t.matrix[13] = transform.get_number();
transform.get_operator(")");
}
else if (transform.is_keyword("translate"))
{
transform.get_keyword("translate");
transform.get_operator("(");
double tx = transform.get_number();
double ty = transform.is_number() ? transform.get_number() : 0.0;
transform.get_operator(")");
t = clan::Mat4d::translate(tx, ty, 0.0);
}
else if (transform.is_keyword("scale"))
{
transform.get_keyword("scale");
transform.get_operator("(");
double sx = transform.get_number();
double sy = transform.is_number() ? transform.get_number() : sx;
transform.get_operator(")");
t = clan::Mat4d::scale(sx, sy, 0.0);
}
else if (transform.is_keyword("rotate"))
{
transform.get_keyword("rotate");
transform.get_operator("(");
double a = transform.get_number() * clan::PI / 180.0;
t = clan::Mat4d::identity();
t.matrix[0] = std::cos(a);
t.matrix[1] = std::sin(a);
t.matrix[4] = -t.matrix[1];
t.matrix[5] = -t.matrix[0];
if (transform.is_number())
{
double tx = transform.get_number();
double ty = transform.is_number() ? transform.get_number() : 0.0;
t = clan::Mat4d::translate(tx, ty, 0.0) * t * clan::Mat4d::translate(-tx, -ty, 0.0);
}
transform.get_operator(")");
}
else if (transform.is_keyword("skewX"))
{
transform.get_keyword("skewX");
transform.get_operator("(");
double a = transform.get_number() * clan::PI / 180.0;
transform.get_operator(")");
t = clan::Mat4d::identity();
t.matrix[4] = std::tan(a);
}
else if (transform.is_keyword("skewY"))
{
transform.get_keyword("skewY");
transform.get_operator("(");
double a = transform.get_number() * clan::PI / 180.0;
transform.get_operator(")");
t = clan::Mat4d::identity();
t.matrix[1] = std::tan(a);
}
else
{
transform.parse_error("expected transform keyword");
}
mat = mat * t;
if (transform.is_operator(","))
transform.get_operator(",");
}
old_transform = canvas.get_transform();
canvas.mult_transform(clan::Mat4f(mat));
transform_active = true;
}
catch (clan::Exception &)
{
}
}
SvgTransformScope::SvgTransformScope(clan::Canvas &canvas, clan::DomElement &e) : canvas(canvas)
{
old_transform = canvas.get_transform();
canvas.mult_transform(parse_transform(e, transform_active));
}