fonts: Perform blob analysis at SkBaseDevice layer instead of canvas.

Currently we use the onDrawTextBlob hook to analyze the text blob,
which requires replicating the logic for applying the SkDrawLooper and
misses the optimization for skipping ops outside the current clip.

Avoid this by using SkBaseDevice::drawTextBlob instead to ensure we
re-use all the SkCanvas code until the device level.

R=herb@google.com

Bug: 829622
Change-Id: I2721c02541d337e2fb3744132e85758f7c804841
Reviewed-on: https://skia-review.googlesource.com/133101
Commit-Queue: Khusal Sagar <khushalsagar@chromium.org>
Reviewed-by: Herb Derby <herb@google.com>

1 files changed, 5 insertions, 19 deletions

diff --git a/src/core/SkRemoteGlyphCache.h b/src/core/SkRemoteGlyphCache.h
index 2772de67cb..ce318489e4 100644
--- a/src/core/SkRemoteGlyphCache.h
+++ b/src/core/SkRemoteGlyphCache.h
@@ -62,6 +62,10 @@ public:
         int fMaxTextureSize = 0;
         size_t fMaxTextureBytes = 0u;
     };
+    SkTextBlobCacheDiffCanvas(int width, int height, const SkSurfaceProps& props,
+                              SkStrikeServer* strikeserver, Settings settings = Settings());
+
+    // TODO(khushalsagar): Remove once removed from chromium.
     SkTextBlobCacheDiffCanvas(int width, int height, const SkMatrix& deviceMatrix,
                               const SkSurfaceProps& props, SkStrikeServer* strikeserver,
                               Settings settings = Settings());
@@ -69,29 +73,11 @@ public:
 
 protected:
     SkCanvas::SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec& rec) override;
-
     void onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
                         const SkPaint& paint) override;
 
 private:
-    void processLooper(const SkPoint& position,
-                       const SkTextBlobRunIterator& it,
-                       const SkPaint& origPaint,
-                       SkDrawLooper* looper);
-    void processGlyphRun(const SkPoint& position,
-                         const SkTextBlobRunIterator& it,
-                         const SkPaint& runPaint);
-    void processGlyphRunForPaths(const SkTextBlobRunIterator& it, const SkPaint& runPaint,
-                                 const SkMatrix& runMatrix);
-#if SK_SUPPORT_GPU
-    bool processGlyphRunForDFT(const SkTextBlobRunIterator& it, const SkPaint& runPaint,
-                               const SkMatrix& runMatrix);
-#endif
-    const SkSurfaceProps& surfaceProps() const;
-
-    const SkMatrix fDeviceMatrix;
-    SkStrikeServer* const fStrikeServer;
-    const Settings fSettings;
+    class TrackLayerDevice;
 };
 
 using SkDiscardableHandleId = uint32_t;