Full implementation of Canvas.drawPath()

Change-Id: I23223b89770a0cd2b4762365bead9bfddb094290

1 files changed, 54 insertions, 1 deletions

diff --git a/tests/HwAccelerationTest/src/com/android/test/hwui/TextOnPathActivity.java b/tests/HwAccelerationTest/src/com/android/test/hwui/TextOnPathActivity.java
index b798ee7..9849e3c 100644
--- a/tests/HwAccelerationTest/src/com/android/test/hwui/TextOnPathActivity.java
+++ b/tests/HwAccelerationTest/src/com/android/test/hwui/TextOnPathActivity.java
@@ -21,18 +21,21 @@ import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.graphics.Path;
+import android.graphics.PathMeasure;
 import android.os.Bundle;
 import android.view.View;
 
 @SuppressWarnings({"UnusedDeclaration"})
 public class TextOnPathActivity extends Activity {
     private Path mPath;
+    private Path mStraightPath;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
         mPath = makePath();
+        mStraightPath = makeStraightPath();
 
         final TextOnPathView view = new TextOnPathView(this);
         setContentView(view);
@@ -51,11 +54,28 @@ public class TextOnPathActivity extends Activity {
         path.cubicTo(-80.0f, 200.0f, 100.0f, 200.0f, 200.0f, 0.0f);
     }
 
+    private Path makeStraightPath() {
+        Path path = new Path();
+        buildStraightPath(path);
+        return path;
+    }
+
+    private void buildStraightPath(Path path) {
+        path.moveTo(0.0f, 0.0f);
+        path.lineTo(400.0f, 0.0f);
+    }
+
     public class TextOnPathView extends View {
         private static final String TEST_STRING = "Hello OpenGL renderer, text on path! ";
 
         private final Paint mPaint;
+        private final Paint mPathPaint;
         private final String mText;
+        private final PathMeasure mMeasure;
+        private final float mLength;
+        private final float[] mLines;
+        private final float[] mPos;
+        private final float[] mTan;
 
         public TextOnPathView(Context c) {
             super(c);
@@ -64,11 +84,23 @@ public class TextOnPathActivity extends Activity {
             mPaint.setAntiAlias(true);
             mPaint.setColor(0xff000000);
 
+            mPathPaint = new Paint();
+            mPathPaint.setAntiAlias(true);
+            mPathPaint.setStyle(Paint.Style.STROKE);
+            mPathPaint.setColor(0xff000099);
+
             StringBuilder builder = new StringBuilder(TEST_STRING.length() * 2);
             for (int i = 0; i < 2; i++) {
                 builder.append(TEST_STRING);
             }
             mText = builder.toString();
+
+            mMeasure = new PathMeasure(mPath, false);
+            mLength = mMeasure.getLength();
+            
+            mLines = new float[100 * 4];
+            mPos = new float[2];
+            mTan = new float[2];
         }
 
         @Override
@@ -81,19 +113,40 @@ public class TextOnPathActivity extends Activity {
             canvas.translate(400.0f, 350.0f);
             mPaint.setTextAlign(Paint.Align.LEFT);
             canvas.drawTextOnPath(mText + mText, mPath, 0.0f, 0.0f, mPaint);
+            canvas.drawPath(mPath, mPathPaint);
+            
+            for (int i = 0; i < 100; i++) {
+                mMeasure.getPosTan(i * mLength / 100.0f, mPos, mTan);
+                mLines[i * 4    ] = mPos[0];
+                mLines[i * 4 + 1] = mPos[1];
+                mLines[i * 4 + 2] = mPos[0] + mTan[1] * 15;
+                mLines[i * 4 + 3] = mPos[1] - mTan[0] * 15;
+            }
+            canvas.drawLines(mLines, mPathPaint);
+            
+            canvas.translate(200.0f, 0.0f);
+            canvas.drawTextOnPath(mText + mText, mStraightPath, 0.0f, 0.0f, mPaint);
+            canvas.drawPath(mStraightPath, mPathPaint);
+
             canvas.restore();
 
             canvas.save();
             canvas.translate(150.0f, 60.0f);
-            canvas.drawTextOnPath(mText, mPath, 0.0f, 0.0f, mPaint);
+            canvas.drawTextOnPath(mText, mPath, 0.0f, 10.0f, mPaint);
+            mMeasure.getPosTan(5.0f, mPos, mTan);
+            canvas.drawLine(mPos[0], mPos[1], mPos[0] + mTan[1] * 10, mPos[1] - mTan[0] * 10,
+                    mPathPaint);
+            canvas.drawPath(mPath, mPathPaint);
 
             canvas.translate(250.0f, 0.0f);
             mPaint.setTextAlign(Paint.Align.CENTER);
             canvas.drawTextOnPath(mText, mPath, 0.0f, 0.0f, mPaint);
+            canvas.drawPath(mPath, mPathPaint);
 
             canvas.translate(250.0f, 0.0f);
             mPaint.setTextAlign(Paint.Align.RIGHT);
             canvas.drawTextOnPath(mText, mPath, 0.0f, 0.0f, mPaint);
+            canvas.drawPath(mPath, mPathPaint);
             canvas.restore();
         }
     }