[librsvg: 2/90] DrawingCtx: don't use the base offsets at all

[Federico Mena Quintero <federico src gnome org>]

commit 2f119bbbf1d740d62c25e0ce03d21968d4498729
Author: Federico Mena Quintero <federico gnome org>
Date:   Fri Mar 8 09:43:14 2019 -0600

    DrawingCtx: don't use the base offsets at all
    
    We will always operate with respect to the initial transformation matrix.

 rsvg_internals/src/drawing_ctx.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)
---
diff --git a/rsvg_internals/src/drawing_ctx.rs b/rsvg_internals/src/drawing_ctx.rs
index 93c52b87..652a9210 100644
--- a/rsvg_internals/src/drawing_ctx.rs
+++ b/rsvg_internals/src/drawing_ctx.rs
@@ -135,6 +135,9 @@ impl DrawingCtx {
                 cairo::Matrix::identity(),
             )
         } else {
+            let rect = *viewport;
+            let affine = cairo::Matrix::identity();
+            /*
             let mut affine = cr.get_matrix();
             let rect = viewport.transform(&affine).outer();
 
@@ -143,6 +146,7 @@ impl DrawingCtx {
             affine.x0 -= rect.x;
             affine.y0 -= rect.y;
             cr.set_matrix(affine);
+             */
 
             // https://www.w3.org/TR/SVG2/coords.html#InitialCoordinateSystem
             //
@@ -360,11 +364,14 @@ impl DrawingCtx {
     }
 
     fn get_offset(&self) -> (f64, f64) {
+        /*
         if self.is_cairo_context_nested(&self.get_cairo_context()) {
             (0.0, 0.0)
         } else {
             (self.rect.x, self.rect.y)
         }
+         */
+        (0.0, 0.0)
     }
 
     pub fn with_discrete_layer(
@@ -734,7 +741,10 @@ impl DrawingCtx {
     }
 
     pub fn get_snapshot(&self, surface: &cairo::ImageSurface) {
+        /*
         let (x, y) = (self.rect.x, self.rect.y);
+         */
+        let (x, y) = (0.0, 0.0);
 
         // TODO: as far as I can tell this should not render elements past the last (topmost) one
         // with enable-background: new (because technically we shouldn't have been caching them).