Turn off hinting by default for higher density displays.

Also adds an API for apps to control whether hinting is used.

Change-Id: I1a06b06255fbb8d0f02a8ce48c2cd60019088ed3

1 files changed, 27 insertions, 0 deletions

diff --git a/graphics/java/android/graphics/Paint.java b/graphics/java/android/graphics/Paint.java
index 828bafd..cde997e 100644
--- a/graphics/java/android/graphics/Paint.java
+++ b/graphics/java/android/graphics/Paint.java
@@ -20,6 +20,7 @@ import android.text.GraphicsOperations;
 import android.text.SpannableString;
 import android.text.SpannedString;
 import android.text.TextUtils;
+import android.util.DisplayMetrics;
 
 /**
  * The Paint class holds the style and color information about how to draw
@@ -106,6 +107,16 @@ public class Paint {
     static final int DEFAULT_PAINT_FLAGS = DEV_KERN_TEXT_FLAG;
 
     /**
+     * Option for {@link #setHinting}: disable hinting.
+     */
+    public static final int HINTING_OFF = 0x0;
+
+    /**
+     * Option for {@link #setHinting}: enable hinting.
+     */
+    public static final int HINTING_ON = 0x1;
+
+    /**
      * Bidi flag to set LTR paragraph direction.
      * 
      * @hide
@@ -333,6 +344,8 @@ public class Paint {
     public Paint(int flags) {
         mNativePaint = native_init();
         setFlags(flags | DEFAULT_PAINT_FLAGS);
+        setHinting(DisplayMetrics.DENSITY_DEVICE >= DisplayMetrics.DENSITY_TV
+                ? HINTING_OFF : HINTING_ON);
         mCompatScaling = mInvCompatScaling = 1;
     }
 
@@ -367,6 +380,8 @@ public class Paint {
     public void reset() {
         native_reset(mNativePaint);
         setFlags(DEFAULT_PAINT_FLAGS);
+        setHinting(DisplayMetrics.DENSITY_DEVICE >= DisplayMetrics.DENSITY_TV
+                ? HINTING_OFF : HINTING_ON);
         mHasCompatScaling = false;
         mCompatScaling = mInvCompatScaling = 1;
         mBidiFlags = BIDI_DEFAULT_LTR;
@@ -446,6 +461,18 @@ public class Paint {
     public native void setFlags(int flags);
 
     /**
+     * Return the paint's hinting mode.  Returns either
+     * {@link #HINTING_OFF} or {@link #HINTING_ON}.
+     */
+    public native int getHinting();
+
+    /**
+     * Set the paint's hinting mode.  May be either
+     * {@link #HINTING_OFF} or {@link #HINTING_ON}.
+     */
+    public native void setHinting(int mode);
+
+    /**
      * Helper for getFlags(), returning true if ANTI_ALIAS_FLAG bit is set
      * AntiAliasing smooths out the edges of what is being drawn, but is has
      * no impact on the interior of the shape. See setDither() and