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-rw-r--r--image/VectorImage.cpp11
1 files changed, 10 insertions, 1 deletions
diff --git a/image/VectorImage.cpp b/image/VectorImage.cpp
index 6e3928362..2976f5243 100644
--- a/image/VectorImage.cpp
+++ b/image/VectorImage.cpp
@@ -931,12 +931,21 @@ VectorImage::CreateSurfaceAndShow(const SVGDrawingParameters& aParams, BackendTy
RefPtr<gfxDrawable> svgDrawable =
new gfxCallbackDrawable(cb, aParams.size);
+ // We take an early exit without using the surface cache if
+ // x or y > maxDimension, because for vector images this can cause bad perf
+ // issues if large sizes are scaled repeatedly (a rather common scenario)
+ // that can quickly exhaust the cache.
+ uint32_t maxDimension = 3000;
+
bool bypassCache = bool(aParams.flags & FLAG_BYPASS_SURFACE_CACHE) ||
// Refuse to cache animated images:
// XXX(seth): We may remove this restriction in bug 922893.
mHaveAnimations ||
// The image is too big to fit in the cache:
- !SurfaceCache::CanHold(aParams.size);
+ !SurfaceCache::CanHold(aParams.size) ||
+ // Image x or y is larger than our cache cap:
+ aParams.size.width > maxDimension ||
+ aParams.size.height > maxDimension;
if (bypassCache) {
return Show(svgDrawable, aParams);
}