[librsvg/wip/rust-api: 5/11] CairoRenderer: add get_dimensions() method

[Federico Mena Quintero <federico src gnome org>]

commit 648fcc8b37b238966a499b7c7f32941f523058c9
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Feb 13 16:38:10 2019 -0600

    CairoRenderer: add get_dimensions() method
    
    This will go away eventually with the dimensions-api branch, but for
    now this lets us start replacing the high-level tests with Rust.

 librsvg_crate/src/lib.rs | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/librsvg_crate/src/lib.rs b/librsvg_crate/src/lib.rs
index f457e221..48f6e8d4 100644
--- a/librsvg_crate/src/lib.rs
+++ b/librsvg_crate/src/lib.rs
@@ -114,6 +114,11 @@ impl<'a> CairoRenderer<'a> {
         self.dpi = Dpi::new(dpi_x, dpi_y);
     }
 
+    pub fn get_dimensions(&self) -> Result<(i32, i32), RenderingError> {
+        self.handle.0.get_dimensions()
+            .map(|dimensions| (dimensions.width, dimensions.height))
+    }
+
     pub fn render(&self, cr: &cairo::Context) -> Result<(), RenderingError> {
         self.handle.0.render_cairo_sub(cr, None)
     }