[cairo] drawing a subimage

[Christian Biesinger]

Jeff Bezanson wrote:
>     cairo_rectangle(cr, 0, 0, w, h);
>     cairo_clip(cr);
>     cairo_set_source(cr, pt);
>     cairo_matrix_init_translate(&matrix, xoffs, yoffs);
>     cairo_pattern_set_matrix(pt, &matrix);
>     cairo_paint(cr);

Couldn't you just fill a rectangle? E.g.:

      cairo_set_source(cr, pt);
      cairo_matrix_init_translate(&matrix, xoffs, yoffs);
      cairo_pattern_set_matrix(pt, &matrix);
      cairo_rectangle(cr, 0, 0, w, h);
      cairo_fill(cr);
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