Gamma correction for distance field text.

src/core/SkMaskGamma.h

Index: src/core/SkMaskGamma.h
diff --git a/src/core/SkMaskGamma.h b/src/core/SkMaskGamma.h
index 1f2b73caacd44fdd92931d812975225bf49b5e46..08ed97f913f210f13ca5110065cdec04497bf86c 100644
--- a/src/core/SkMaskGamma.h
+++ b/src/core/SkMaskGamma.h
@@ -136,6 +136,22 @@ public:
      */
     PreBlend preBlend(SkColor color) const;
 
+    /**
+     * Get dimensions for the full table set, so it can be allocated as a block.
+     */
+    void getGammaTableDimensions(int* tableWidth, int* numTables) const {
+        *tableWidth = 256;
+        *numTables = (1 << MAX_LUM_BITS);
+    }
+
+    /**
+     * Provides direct access to the full table set, so it can be uploaded
+     * into a texture.
+     */
+    const uint8_t* getGammaTables() const {
+        return (const uint8_t*) fGammaTables;
+    }
+    
 private:
     static const int MAX_LUM_BITS =
           B_LUM_BITS > (R_LUM_BITS > G_LUM_BITS ? R_LUM_BITS : G_LUM_BITS)