[librsvg: 90/90] Merge branch 'viewport-with-offsets'

[Federico Mena Quintero <federico src gnome org>]

commit 69873e0c98c946a0fa7b71ea31087516c0eb1bb9
Merge: bce6729f 906d495a
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue Mar 26 13:11:06 2019 -0600

    Merge branch 'viewport-with-offsets'
    
    This looks like a lot of changes, but in reality it is this:
    
    * Instead of the draw_ctx.set_affine_on_cr() machinery all over the
      place, now DrawingCtx is responsible for maintaining all the
      affines for the temporary compositing surfaces.
    
    * There is no offset for temporary surfaces.  They are assumed to be
      always at (0, 0) in the toplevel viewport's coordinate system.
      We may ensure that temporary surfaces are pixel-aligned at some
      point in the future.
    
    * This lets Handle.render_element_to_viewport() actually work.
    
    * A couple new abstractions: DrawingCtx.with_saved_cr(),
      DrawingCtx.with_saved_matrix().
    
    * This gets us closer to unifying viewports/surfaces/contexts.  Now
      things can call DrawingCtx.create_surface_for_toplevel_viewport()
      instead of creating a surface by hand themselves.
    
    * Lots of cleanups for the big scary DrawingCtx.with_discrete_layer()
    
    This has new tests for librsvg_crate, which are particularly exciting,
    since librsvg_crate/tests/primitives.rs generates reftests
    programatically with Cairo, instead of using reference images.  It may
    be good to test all the primitives here in that fashion.

 Makefile.am                                        |   7 +-
 .../clip-on-transformed-viewport-200x200.png       | Bin 0 -> 1117 bytes
 .../mask-on-transformed-viewport-200x200.png       | Bin 0 -> 1117 bytes
 .../rect-48x48-offsetted-100x100-10x20.png         | Bin 0 -> 1331 bytes
 ...insic-dimensions.rs => intrinsic_dimensions.rs} |  14 +-
 librsvg_crate/tests/primitives.rs                  | 259 +++++++++++
 librsvg_crate/tests/render_to_viewport.rs          | 201 ++++++---
 .../tests/{ => utils}/compare_surfaces.rs          |   0
 librsvg_crate/tests/utils/mod.rs                   | 149 +++++++
 rsvg_internals/src/clip_path.rs                    |  59 ++-
 rsvg_internals/src/drawing_ctx.rs                  | 485 +++++++++++++--------
 rsvg_internals/src/filters/context.rs              |  11 +-
 rsvg_internals/src/filters/mod.rs                  |  33 +-
 rsvg_internals/src/handle.rs                       |  30 +-
 rsvg_internals/src/image.rs                        |  68 +--
 rsvg_internals/src/marker.rs                       |  28 +-
 rsvg_internals/src/mask.rs                         |  73 ++--
 rsvg_internals/src/node.rs                         |  14 +-
 rsvg_internals/src/shapes.rs                       |   1 -
 rsvg_internals/src/structure.rs                    |  49 +--
 rsvg_internals/src/text.rs                         | 113 +++--
 rsvg_internals/src/xml2.rs                         |   2 +
 rsvg_internals/src/xml2_load.rs                    |  11 +
 23 files changed, 1099 insertions(+), 508 deletions(-)
---