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linuxsvgvector-graphicslibrsvg

scaling vector images through librsvg

Is it possible to scale the svg before getting its pixel buffer through librsvg? I can see API like rsvg_pixbuf_from_file_at_zoom but it is marked as deprecated.

Is there some other way to do it? I wan to avoid using cairo for this, if possible.

Solution

  • You do not have many choices, it's either:

    • using a deprecated function like rsvg_pixbuf_from_file_at_size() (which is not that bad, it's not very likely this function will go away any time soon)
    • or using the RsvgHandle object with rsvg_handle_new_from_file() and rsvg_handle_render_cairo() on a cairo surface create at the right dimension

    You can limit the usage of cairo to a minimum if you want a GdkPixbuf at the end by:

    • creating a RsvgHandle with rsvg_handle_new_from_file()
    • creating a cairo context and setting up the transformation matrix you want
    • render the svg with rsvg_handle_render_cairo()
    • grab the pixbuf with rsvg_handle_get_pixbuf()