Compile Launcher against only public apis (level 16)

Also, removing use of TableMaskFilter (last remaining private api)

Change-Id: I2df80605b240352fdf7ef2ebd26b98342149bda3

Android.mk

@@ -22,7 +22,7 @@ LOCAL_MODULE_TAGS := optional
 LOCAL_STATIC_JAVA_LIBRARIES := android-common android-support-v13
 
 LOCAL_SRC_FILES := $(call all-java-files-under, src) $(call all-renderscript-files-under, src)
-
+LOCAL_SDK_VERSION := 16
 
 LOCAL_PACKAGE_NAME := Launcher2
 LOCAL_CERTIFICATE := shared

src/com/android/launcher2/AppsCustomizePagedView.java

@@ -41,7 +41,6 @@ import android.graphics.PorterDuff;
 import android.graphics.Rect;
 import android.graphics.RectF;
 import android.graphics.Shader;
-import android.graphics.TableMaskFilter;
 import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.Drawable;
 import android.os.AsyncTask;
@@ -774,24 +773,17 @@ public class AppsCustomizePagedView extends PagedViewWithDraggableItems implemen
             createItemInfo.spanX = createItemInfo.spanY = 1;
         }
 
-        // We use a custom alpha clip table for the default widget previews
-        Paint alphaClipPaint = null;
-        if (createItemInfo instanceof PendingAddWidgetInfo) {
-            if (((PendingAddWidgetInfo) createItemInfo).previewImage != 0) {
-                MaskFilter alphaClipTable = TableMaskFilter.CreateClipTable(0, 255);
-                alphaClipPaint = new Paint();
-                alphaClipPaint.setMaskFilter(alphaClipTable);
-            }
-        }
+        // Don't clip alpha values for the drag outline if we're using the default widget preview
+        boolean clipAlpha = !(createItemInfo instanceof PendingAddWidgetInfo &&
+                (((PendingAddWidgetInfo) createItemInfo).previewImage == 0));
 
         // Save the preview for the outline generation, then dim the preview
         outline = Bitmap.createScaledBitmap(preview, preview.getWidth(), preview.getHeight(),
                 false);
 
         // Start the drag
-        alphaClipPaint = null;
         mLauncher.lockScreenOrientation();
-        mLauncher.getWorkspace().onDragStartedWithItem(createItemInfo, outline, alphaClipPaint);
+        mLauncher.getWorkspace().onDragStartedWithItem(createItemInfo, outline, clipAlpha);
         mDragController.startDrag(image, preview, this, createItemInfo,
                 DragController.DRAG_ACTION_COPY, null, scale);
         outline.recycle();

src/com/android/launcher2/HolographicOutlineHelper.java

@@ -23,13 +23,11 @@ import android.graphics.MaskFilter;
 import android.graphics.Paint;
 import android.graphics.PorterDuff;
 import android.graphics.PorterDuffXfermode;
-import android.graphics.TableMaskFilter;
 
 public class HolographicOutlineHelper {
     private final Paint mHolographicPaint = new Paint();
     private final Paint mBlurPaint = new Paint();
     private final Paint mErasePaint = new Paint();
-    private final Paint mAlphaClipPaint = new Paint();
 
     public static final int MAX_OUTER_BLUR_RADIUS;
     public static final int MIN_OUTER_BLUR_RADIUS;
@@ -61,8 +59,6 @@ public class HolographicOutlineHelper {
         sMediumInnerBlurMaskFilter = new BlurMaskFilter(scale * 2.0f, BlurMaskFilter.Blur.NORMAL);
     }
 
-    private int[] mTempOffset = new int[2];
-
     HolographicOutlineHelper() {
         mHolographicPaint.setFilterBitmap(true);
         mHolographicPaint.setAntiAlias(true);
@@ -71,8 +67,6 @@ public class HolographicOutlineHelper {
         mErasePaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));
         mErasePaint.setFilterBitmap(true);
         mErasePaint.setAntiAlias(true);
-        MaskFilter alphaClipTable = TableMaskFilter.CreateClipTable(180, 255);
-        mAlphaClipPaint.setMaskFilter(alphaClipTable);
     }
 
     /**
@@ -102,18 +96,28 @@ public class HolographicOutlineHelper {
      */
     void applyExpensiveOutlineWithBlur(Bitmap srcDst, Canvas srcDstCanvas, int color,
             int outlineColor, int thickness) {
-        applyExpensiveOutlineWithBlur(srcDst, srcDstCanvas, color, outlineColor, mAlphaClipPaint,
+        applyExpensiveOutlineWithBlur(srcDst, srcDstCanvas, color, outlineColor, true,
                 thickness);
     }
     void applyExpensiveOutlineWithBlur(Bitmap srcDst, Canvas srcDstCanvas, int color,
-            int outlineColor, Paint alphaClipPaint, int thickness) {
+            int outlineColor, boolean clipAlpha, int thickness) {
 
         // We start by removing most of the alpha channel so as to ignore shadows, and
         // other types of partial transparency when defining the shape of the object
-        if (alphaClipPaint == null) {
-            alphaClipPaint = mAlphaClipPaint;
+        if (clipAlpha) {
+            int[] srcBuffer = new int[srcDst.getWidth() * srcDst.getHeight()];
+            srcDst.getPixels(srcBuffer,
+                    0, srcDst.getWidth(), 0, 0, srcDst.getWidth(), srcDst.getHeight());
+            for (int i = 0; i < srcBuffer.length; i++) {
+                final int alpha = srcBuffer[i] >>> 24;
+                if (alpha < 188) {
+                    srcBuffer[i] = 0;
+                }
+            }
+            srcDst.setPixels(srcBuffer,
+                    0, srcDst.getWidth(), 0, 0, srcDst.getWidth(), srcDst.getHeight());
         }
-        Bitmap glowShape = srcDst.extractAlpha(alphaClipPaint, mTempOffset);
+        Bitmap glowShape = srcDst.extractAlpha();
 
         // calculate the outer blur first
         BlurMaskFilter outerBlurMaskFilter;
@@ -205,8 +209,8 @@ public class HolographicOutlineHelper {
     }
 
     void applyMediumExpensiveOutlineWithBlur(Bitmap srcDst, Canvas srcDstCanvas, int color,
-            int outlineColor, Paint alphaClipPaint) {
-        applyExpensiveOutlineWithBlur(srcDst, srcDstCanvas, color, outlineColor, alphaClipPaint,
+            int outlineColor, boolean clipAlpha) {
+        applyExpensiveOutlineWithBlur(srcDst, srcDstCanvas, color, outlineColor, clipAlpha,
                 MEDIUM);
     }
 

src/com/android/launcher2/Workspace.java

@@ -1478,14 +1478,14 @@ public class Workspace extends SmoothPagedView
         mDragOutline = createDragOutline(v, canvas, DRAG_BITMAP_PADDING);
     }
 
-    public void onDragStartedWithItem(PendingAddItemInfo info, Bitmap b, Paint alphaClipPaint) {
+    public void onDragStartedWithItem(PendingAddItemInfo info, Bitmap b, boolean clipAlpha) {
         final Canvas canvas = new Canvas();
 
         int[] size = estimateItemSize(info.spanX, info.spanY, info, false);
 
         // The outline is used to visualize where the item will land if dropped
         mDragOutline = createDragOutline(b, canvas, DRAG_BITMAP_PADDING, size[0],
-                size[1], alphaClipPaint);
+                size[1], clipAlpha);
     }
 
     public void exitWidgetResizeMode() {
@@ -1798,7 +1798,7 @@ public class Workspace extends SmoothPagedView
      * Responsibility for the bitmap is transferred to the caller.
      */
     private Bitmap createDragOutline(Bitmap orig, Canvas canvas, int padding, int w, int h,
-            Paint alphaClipPaint) {
+            boolean clipAlpha) {
         final int outlineColor = getResources().getColor(android.R.color.holo_blue_light);
         final Bitmap b = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
         canvas.setBitmap(b);
@@ -1815,7 +1815,7 @@ public class Workspace extends SmoothPagedView
 
         canvas.drawBitmap(orig, src, dst, null);
         mOutlineHelper.applyMediumExpensiveOutlineWithBlur(b, canvas, outlineColor, outlineColor,
-                alphaClipPaint);
+                clipAlpha);
         canvas.setBitmap(null);
 
         return b;