Implement batch horizontal advances callback

The SkFont's overhead is not negligible if we performs glyph width
computation one-by-one. HarfBuzz now supports batch width request,
so let's use it for aoviding SkFont's overhead.

Here is the raw performance scores:

android.text.StaticLayoutPerfTest:
  create
    RandomText Balanced Hyphenation       : 16,311 -> 15,253: (-1058, -6.5%)
    RandomText Balanced NoHyphenation     :  6,679 ->  6,164: ( -515, -7.7%)
    RandomText Greedy Hyphenation         :  6,614 ->  6,083: ( -531, -8.0%)
    RandomText Greedy NoHyphenation       :  6,613 ->  6,090: ( -523, -7.9%)

Bug: 123907498
Test: minikin_tests
Test: hwui_unit_tests
Test: atest CtsTextTestCases
Test: atest CtsGraphicsTestCases
Test: atest CtsWidgetTestCases
Test: TreeHugger
Change-Id: I5a33e24aa0b5d865f02518c5e80177d5a7706593

2 files changed, 14 insertions, 0 deletions

diff --git a/libs/hwui/hwui/MinikinSkia.cpp b/libs/hwui/hwui/MinikinSkia.cpp
index 375f5bc9df37..6a12a203b9f8 100644
--- a/libs/hwui/hwui/MinikinSkia.cpp
+++ b/libs/hwui/hwui/MinikinSkia.cpp
@@ -65,6 +65,15 @@ float MinikinFontSkia::GetHorizontalAdvance(uint32_t glyph_id, const minikin::Mi
     return skWidth;
 }
 
+void MinikinFontSkia::GetHorizontalAdvances(uint16_t* glyph_ids, uint32_t count,
+                                            const minikin::MinikinPaint& paint,
+                                            const minikin::FontFakery& fakery,
+                                            float* outAdvances) const {
+    SkFont skFont;
+    MinikinFontSkia_SetSkiaFont(this, &skFont, paint, fakery);
+    skFont.getWidths(glyph_ids, count, outAdvances);
+}
+
 void MinikinFontSkia::GetBounds(minikin::MinikinRect* bounds, uint32_t glyph_id,
                                 const minikin::MinikinPaint& paint,
                                 const minikin::FontFakery& fakery) const {
diff --git a/libs/hwui/hwui/MinikinSkia.h b/libs/hwui/hwui/MinikinSkia.h
index ad46b2391cac..90f7d48a47ee 100644
--- a/libs/hwui/hwui/MinikinSkia.h
+++ b/libs/hwui/hwui/MinikinSkia.h
@@ -35,6 +35,11 @@ public:
     float GetHorizontalAdvance(uint32_t glyph_id, const minikin::MinikinPaint& paint,
                                const minikin::FontFakery& fakery) const override;
 
+    void GetHorizontalAdvances(uint16_t* glyph_ids, uint32_t count,
+                               const minikin::MinikinPaint& paint,
+                               const minikin::FontFakery& fakery,
+                               float* outAdvances) const override;
+
     void GetBounds(minikin::MinikinRect* bounds, uint32_t glyph_id,
                    const minikin::MinikinPaint& paint,
                    const minikin::FontFakery& fakery) const override;