A basket of features: itemization, bounds, refcount

This patch improves script run itemization and also exposes metrics
and bounds for layouts. In addition, there is a fair amount of internal
cleanup, including ref counting, and making the MinikinFont abstraction
strong enough to support both FreeType and Skia implementations. There
is also a sample implementation using Skia, in the sample directory.

As part of its functionality, his patch measures the bounds of the
layout and gives access through Layout::GetBounds().  The corresponding
method is not implemented in the FreeType-only implementation of
MinikinFont, so that will probably have to be fixed.

Change-Id: Ib1a3fe9d7c90519ac651fb4aa957848e4bb758ec

1 files changed, 26 insertions, 0 deletions

diff --git a/sample/MinikinSkia.h b/sample/MinikinSkia.h
new file mode 100644
index 0000000..8286a4c
--- /dev/null
+++ b/sample/MinikinSkia.h
@@ -0,0 +1,26 @@
+namespace android {
+
+class MinikinFontSkia : public MinikinFont {
+public:
+    explicit MinikinFontSkia(SkTypeface *typeface);
+
+    ~MinikinFontSkia();
+
+    bool GetGlyph(uint32_t codepoint, uint32_t *glyph) const;
+
+    float GetHorizontalAdvance(uint32_t glyph_id,
+        const MinikinPaint &paint) const;
+
+    // If buf is NULL, just update size
+    bool GetTable(uint32_t tag, uint8_t *buf, size_t *size);
+
+    int32_t GetUniqueId() const;
+
+    SkTypeface *GetSkTypeface();
+
+private:
+    SkTypeface *mTypeface;
+
+};
+
+}  // namespace android
\ No newline at end of file