Function resvg_render 

#[unsafe(no_mangle)]
pub extern "C" fn resvg_render(
    tree: *const resvg_render_tree,
    transform: resvg_transform,
    width: u32,
    height: u32,
    pixmap: *mut c_char,
)

@brief Renders the #resvg_render_tree onto the pixmap.

@param tree A render tree. @param transform A root SVG transform. Can be used to position SVG inside the pixmap. @param width Pixmap width. @param height Pixmap height. @param pixmap Pixmap data. Should have widthheight4 size and contain premultiplied RGBA8888 pixels.