detect if the computed rgn bounds is too big

Bug:801869
Change-Id: I7380bfb86aedc719cf67e20e918ef39d1b143aee
Reviewed-on: https://skia-review.googlesource.com/95020
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/core/SkRegion.cpp b/src/core/SkRegion.cpp
index 8c402e9250..3a1a63e187 100644
--- a/src/core/SkRegion.cpp
+++ b/src/core/SkRegion.cpp
@@ -289,6 +289,11 @@ bool SkRegion::setRuns(RunType runs[], int count) {
     memcpy(fRunHead->writable_runs(), runs, count * sizeof(RunType));
     fRunHead->computeRunBounds(&fBounds);
 
+    // Our computed bounds might be too large, so we have to check here.
+    if (fBounds.isEmpty()) {
+        return this->setEmpty();
+    }
+
     SkDEBUGCODE(this->validate();)
 
     return true;