frameworks/base:(Hack)Print the content displayed with Canvas.drawText

This hack allows us to print content that displayed with the drawText
method of Canvas.java when ro.debug.drawtext is set to true.

This allows us to capture the contents on the screeen
which will help us capture benchmark results for thirdparty apps
which use drawText of Canvas to display results.

Change-Id: Ic114fbe8d469ff27df57c585d3af322c703b4b83
Signed-off-by: Yongqin Liu <yongqin.liu@linaro.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/graphics/java/android/graphics/Canvas.java b/graphics/java/android/graphics/Canvas.java
index 3949afdd4a2a..d085c5e8054d 100644
--- a/graphics/java/android/graphics/Canvas.java
+++ b/graphics/java/android/graphics/Canvas.java
@@ -16,10 +16,12 @@
 
 package android.graphics;
 
+import android.os.SystemProperties;
 import android.text.GraphicsOperations;
 import android.text.SpannableString;
 import android.text.SpannedString;
 import android.text.TextUtils;
+import android.util.Log;
 
 import javax.microedition.khronos.opengles.GL;
 
@@ -37,6 +39,9 @@ import javax.microedition.khronos.opengles.GL;
  * Canvas and Drawables</a> developer guide.</p></div>
  */
 public class Canvas {
+
+    static final String LOG_TAG = "Canvas";
+
     // assigned in constructors, freed in finalizer
     final int mNativeCanvas;
     
@@ -1342,6 +1347,9 @@ public class Canvas {
      * @param paint The paint used for the text (e.g. color, size, style)
      */
     public void drawText(String text, float x, float y, Paint paint) {
+        if (SystemProperties.getBoolean("ro.debug.drawtext", false)) {
+            Log.d(LOG_TAG, text);
+        }
         native_drawText(mNativeCanvas, text, 0, text.length(), x, y, paint.mBidiFlags,
                 paint.mNativePaint);
     }