Function line_width

test/test.cpp:579–602

}

void line_width( canvas &that, float width, float height )
{
    that.set_color( stroke_style, 0.0f, 0.0f, 0.0f, 1.0f );
    that.set_line_width( 4.0f );
    for ( float step = 0.0f; step < 16.0f; step += 1.0f )
    {
        float left = ( step + 0.25f ) / 16.0f * width;
        float right = ( step + 0.75f ) / 16.0f * width;
        that.begin_path();
        that.move_to( left, 0.0f );
        that.bezier_curve_to( left, 0.5f * height,
                              right, 0.5f * height,
                              right, height );
        that.set_line_width( 0.5f * ( step - 1 ) );
        that.stroke();
    }
    that.set_color( fill_style, 1.0f, 1.0f, 1.0f, 1.0f );
    that.global_composite_operation = source_atop;
    that.fill_rectangle( 0.0f, 0.5f * height, width, 0.5f * height );
    that.global_composite_operation = destination_over;
    that.fill_rectangle( 0.0f, 0.25f * height, width, 0.25f * height );
    that.set_color( fill_style, 0.0f, 0.0f, 0.0f, 1.0f );
    that.fill_rectangle( 0.0f, 0.5f * height, width, 0.25f * height );
}

void line_width_angular( canvas &that, float width, float height )
{