Collaboration diagram for anonymous_namespace{NSVGUtils.cpp}::DashesParam:

Public Member Functions
	DashesParam (const NSVGshape &shape, double scale)

Public Attributes
float	dash_length = 1.f
bool	is_line = true
unsigned char	dash_index = 0
std::array< float, max_dash_array_size >	dash_array
unsigned char	dash_count = 0

Static Public Attributes
static constexpr size_t	max_dash_array_size = 8

Detailed Description

Constructor & Destructor Documentation

◆ DashesParam()

anonymous_namespace{NSVGUtils.cpp}::DashesParam::DashesParam	(	const NSVGshape &	shape,
		double	scale )

inlineexplicit

                                                               :
        dash_count(shape.strokeDashCount)
    {
        assert(dash_count > 0);
        assert(dash_count <= max_dash_array_size); // limitation of nanosvg strokeDashArray
        for (size_t i = 0; i < dash_count; ++i)
            dash_array[i] = static_cast<float>(shape.strokeDashArray[i] * scale);
        
        // Figure out dash offset.
        float all_dash_length = 0;
        for (unsigned char j = 0; j < dash_count; ++j)
            all_dash_length += dash_array[j];
 
        if (dash_count%2 == 1) // (shape.strokeDashCount & 1)
            all_dash_length *= 2.0f;
 
        // Find location inside pattern
        float dash_offset = fmodf(static_cast<float>(shape.strokeDashOffset * scale), all_dash_length);
        if (dash_offset < 0.0f)
            dash_offset += all_dash_length;
 
        while (dash_offset > dash_array[dash_index]) {
            dash_offset -= dash_array[dash_index];
            dash_index = (dash_index + 1) % shape.strokeDashCount;
            is_line    = !is_line;
        }
 
        dash_length = dash_array[dash_index] - dash_offset;
    }