Make path range loading explicit

Requires the caller to explicitly preload paths within a range before
calling drawPaths. This allows us to remove the implicit lazy load,
thereby eliminating a redundant check on every redraw of a text blob.

BUG=skia:

Review URL: https://codereview.chromium.org/1382013002

1 files changed, 4 insertions, 0 deletions

diff --git a/src/gpu/batches/GrDrawPathBatch.h b/src/gpu/batches/GrDrawPathBatch.h
index bb76abb26b..91e0e41ee4 100644
--- a/src/gpu/batches/GrDrawPathBatch.h
+++ b/src/gpu/batches/GrDrawPathBatch.h
@@ -115,6 +115,10 @@ public:
 
     const GrPathRange* range() const { return fPathRange.get(); }
 
+    void loadGlyphPathsIfNeeded() {
+        fPathRange.get()->loadPathsIfNeeded<uint16_t>(fIndices.begin(), fIndices.count());
+    }
+
     static bool CanMerge(const GrPathRangeDraw& a, const GrPathRangeDraw& b) {
         return a.transformType() == b.transformType() && a.range() == b.range();
     }