[skottie] Clean up AttachLayerContext
Avoid double "ind" lookups, avoid repeated AttachParentLayerMatrix
calls, hide private functions.
TBR=
Change-Id: I78f11593ffe241de3cdfabf7b3a88e8f4e62aa0c
Reviewed-on: https://skia-review.googlesource.com/127327
Commit-Queue: Florin Malita <fmalita@chromium.org>
Reviewed-by: Florin Malita <fmalita@chromium.org>
diff --git a/experimental/skottie/Skottie.cpp b/experimental/skottie/Skottie.cpp
index 03429e7..18c8c19 100644
--- a/experimental/skottie/Skottie.cpp
+++ b/experimental/skottie/Skottie.cpp
@@ -886,35 +886,15 @@
struct AttachLayerContext {
AttachLayerContext(const json::ValueRef& jlayers, AttachContext* ctx)
- : fLayerList(jlayers), fCtx(ctx) {}
+ : fLayerList(jlayers), fCtx(ctx) {
+ SkASSERT(fLayerList.isArray());
+ }
- const json::ValueRef fLayerList;
+ const json::ValueRef fLayerList;
AttachContext* fCtx;
SkTHashMap<int, sk_sp<sksg::Matrix>> fLayerMatrixMap;
sk_sp<sksg::RenderNode> fCurrentMatte;
- sk_sp<sksg::Matrix> AttachParentLayerMatrix(const json::ValueRef& jlayer) {
- SkASSERT(jlayer.isObject());
- SkASSERT(fLayerList.isArray());
-
- const auto parent_index = jlayer["parent"].toDefault<int>(-1);
- if (parent_index < 0)
- return nullptr;
-
- if (auto* m = fLayerMatrixMap.find(parent_index))
- return *m;
-
- sk_sp<sksg::Matrix> matrix;
- for (const json::ValueRef l : fLayerList) {
- if (l["ind"].toDefault<int>(-1) == parent_index) {
- matrix = this->AttachLayerMatrix(l);
- break;
- }
- }
-
- return nullptr;
- }
-
sk_sp<sksg::Matrix> AttachLayerMatrix(const json::ValueRef& jlayer) {
SkASSERT(jlayer.isObject());
@@ -925,15 +905,38 @@
if (auto* m = fLayerMatrixMap.find(layer_index))
return *m;
+ return this->AttachLayerMatrixImpl(jlayer, layer_index);
+ }
+
+private:
+ sk_sp<sksg::Matrix> AttachParentLayerMatrix(const json::ValueRef& jlayer, int layer_index) {
+ SkASSERT(jlayer.isObject());
+
+ const auto parent_index = jlayer["parent"].toDefault<int>(-1);
+ if (parent_index < 0 || parent_index == layer_index)
+ return nullptr;
+
+ if (auto* m = fLayerMatrixMap.find(parent_index))
+ return *m;
+
+ for (const json::ValueRef l : fLayerList) {
+ if (l["ind"].toDefault<int>(-1) == parent_index) {
+ return this->AttachLayerMatrixImpl(l, parent_index);
+ }
+ }
+
+ return nullptr;
+ }
+
+ sk_sp<sksg::Matrix> AttachLayerMatrixImpl(const json::ValueRef& jlayer, int layer_index) {
+ SkASSERT(!fLayerMatrixMap.find(layer_index));
+
// Add a stub entry to break recursion cycles.
fLayerMatrixMap.set(layer_index, nullptr);
- auto parent_matrix = this->AttachParentLayerMatrix(jlayer);
+ auto parent_matrix = this->AttachParentLayerMatrix(jlayer, layer_index);
- return *fLayerMatrixMap.set(layer_index,
- AttachMatrix(jlayer["ks"],
- fCtx,
- this->AttachParentLayerMatrix(jlayer)));
+ return *fLayerMatrixMap.set(layer_index, AttachMatrix(jlayer["ks"], fCtx, parent_matrix));
}
};