[core] Collection-level immutability

Introduce a second level of immutability, over each of the collections held by a style: sources, images, and layers. Tracking immutability at this level allows us to short-circuit significant portions of the RenderStyle update logic via a simple equality check, greatly improving performance.

1 files changed, 2 insertions, 2 deletions

diff --git a/test/sprite/sprite_atlas.test.cpp b/test/sprite/sprite_atlas.test.cpp
index 3226f19c1b..78a5862475 100644
--- a/test/sprite/sprite_atlas.test.cpp
+++ b/test/sprite/sprite_atlas.test.cpp
@@ -23,7 +23,7 @@ TEST(SpriteAtlas, Basic) {
     auto images = parseSprite(util::read_file("test/fixtures/annotations/emerald.png"),
                               util::read_file("test/fixtures/annotations/emerald.json"));
     for (auto& image : images) {
-        atlas.addImage(image->impl);
+        atlas.addImage(image->baseImpl);
     }
 
     auto metro = *atlas.getIcon("metro");
@@ -63,7 +63,7 @@ TEST(SpriteAtlas, Size) {
     auto images = parseSprite(util::read_file("test/fixtures/annotations/emerald.png"),
                               util::read_file("test/fixtures/annotations/emerald.json"));
     for (auto& image : images) {
-        atlas.addImage(image->impl);
+        atlas.addImage(image->baseImpl);
     }
 
     auto metro = *atlas.getIcon("metro");