From 030053f1a4069d3d69a5430ccf675338f89be5a7 Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@gmail.com>
Date: Fri, 2 Nov 2018 11:56:17 +0100
Subject: Backport some upstream Skia patches.

Backport of:
https://skia.googlesource.com/skia/+/c3d8a48f1b27370049aa512019cd726c59354743
https://skia.googlesource.com/skia/+/8051d38358293df1e5b8a1a513f8114147ec9fa3
---
 gfx/skia/skia/src/core/SkPath.cpp | 33 ++++++++++++++++++++++++---------
 1 file changed, 24 insertions(+), 9 deletions(-)

diff --git a/gfx/skia/skia/src/core/SkPath.cpp b/gfx/skia/skia/src/core/SkPath.cpp
index a2ef54620..8f93c9c18 100644
--- a/gfx/skia/skia/src/core/SkPath.cpp
+++ b/gfx/skia/skia/src/core/SkPath.cpp
@@ -14,6 +14,7 @@
 #include "SkPathPriv.h"
 #include "SkPathRef.h"
 #include "SkRRect.h"
+#include "SkTLazy.h"
 
 ////////////////////////////////////////////////////////////////////////////
 
@@ -1491,10 +1492,17 @@ void SkPath::addPath(const SkPath& path, SkScalar dx, SkScalar dy, AddPathMode m
     this->addPath(path, matrix, mode);
 }
 
-void SkPath::addPath(const SkPath& path, const SkMatrix& matrix, AddPathMode mode) {
-    SkPathRef::Editor(&fPathRef, path.countVerbs(), path.countPoints());
+void SkPath::addPath(const SkPath& srcPath, const SkMatrix& matrix, AddPathMode mode) {
+    // Detect if we're trying to add ourself
+    const SkPath* src = &srcPath;
+    SkTLazy<SkPath> tmp;
+    if (this == src) {
+        src = tmp.set(srcPath);
+    }
+
+    SkPathRef::Editor(&fPathRef, src->countVerbs(), src->countPoints());
 
-    RawIter iter(path);
+    RawIter iter(*src);
     SkPoint pts[4];
     Verb    verb;
 
@@ -1602,14 +1610,21 @@ void SkPath::reversePathTo(const SkPath& path) {
     }
 }
 
-void SkPath::reverseAddPath(const SkPath& src) {
-    SkPathRef::Editor ed(&fPathRef, src.fPathRef->countPoints(), src.fPathRef->countVerbs());
+void SkPath::reverseAddPath(const SkPath& srcPath) {
+    // Detect if we're trying to add ourself
+    const SkPath* src = &srcPath;
+    SkTLazy<SkPath> tmp;
+    if (this == src) {
+        src = tmp.set(srcPath);
+    }
+
+    SkPathRef::Editor ed(&fPathRef, src->fPathRef->countPoints(), src->fPathRef->countVerbs());
 
-    const SkPoint* pts = src.fPathRef->pointsEnd();
+    const SkPoint* pts = src->fPathRef->pointsEnd();
     // we will iterator through src's verbs backwards
-    const uint8_t* verbs = src.fPathRef->verbsMemBegin(); // points at the last verb
-    const uint8_t* verbsEnd = src.fPathRef->verbs(); // points just past the first verb
-    const SkScalar* conicWeights = src.fPathRef->conicWeightsEnd();
+    const uint8_t* verbs = src->fPathRef->verbsMemBegin(); // points at the last verb
+    const uint8_t* verbsEnd = src->fPathRef->verbs(); // points just past the first verb
+    const SkScalar* conicWeights = src->fPathRef->conicWeightsEnd();
 
     bool needMove = true;
     bool needClose = false;
-- 
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