1 files changed, 56 insertions, 0 deletions
diff --git a/iconloaderlib/src/com/android/launcher3/icons/FixedScaleDrawable.java b/iconloaderlib/src/com/android/launcher3/icons/FixedScaleDrawable.java
new file mode 100644
index 000000000..e594f477e
--- /dev/null
+++ b/iconloaderlib/src/com/android/launcher3/icons/FixedScaleDrawable.java
@@ -0,0 +1,56 @@
+package com.android.launcher3.icons;
+
+import android.annotation.TargetApi;
+import android.content.res.Resources;
+import android.content.res.Resources.Theme;
+import android.graphics.Canvas;
+import android.graphics.drawable.ColorDrawable;
+import android.graphics.drawable.DrawableWrapper;
+import android.os.Build;
+import android.util.AttributeSet;
+
+import org.xmlpull.v1.XmlPullParser;
+
+/**
+ * Extension of {@link DrawableWrapper} which scales the child drawables by a fixed amount.
+ */
+@TargetApi(Build.VERSION_CODES.N)
+public class FixedScaleDrawable extends DrawableWrapper {
+
+    // TODO b/33553066 use the constant defined in MaskableIconDrawable
+    private static final float LEGACY_ICON_SCALE = .7f * .6667f;
+    private float mScaleX, mScaleY;
+
+    public FixedScaleDrawable() {
+        super(new ColorDrawable());
+        mScaleX = LEGACY_ICON_SCALE;
+        mScaleY = LEGACY_ICON_SCALE;
+    }
+
+    @Override
+    public void draw(Canvas canvas) {
+        int saveCount = canvas.save();
+        canvas.scale(mScaleX, mScaleY,
+                getBounds().exactCenterX(), getBounds().exactCenterY());
+        super.draw(canvas);
+        canvas.restoreToCount(saveCount);
+    }
+
+    @Override
+    public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs) { }
+
+    @Override
+    public void inflate(Resources r, XmlPullParser parser, AttributeSet attrs, Theme theme) { }
+
+    public void setScale(float scale) {
+        float h = getIntrinsicHeight();
+        float w = getIntrinsicWidth();
+        mScaleX = scale * LEGACY_ICON_SCALE;
+        mScaleY = scale * LEGACY_ICON_SCALE;
+        if (h > w && w > 0) {
+            mScaleX *= w / h;
+        } else if (w > h && h > 0) {
+            mScaleY *= h / w;
+        }
+    }
+}