Render default cover programatically

src/org/kreed/vanilla/CoverBitmap.java

@@ -28,8 +28,11 @@ import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.Canvas;
 import android.graphics.Color;
+import android.graphics.LinearGradient;
 import android.graphics.Paint;
 import android.graphics.Rect;
+import android.graphics.RectF;
+import android.graphics.Shader;
 import android.util.DisplayMetrics;
 import android.util.TypedValue;
 
@@ -410,4 +413,47 @@ public final class CoverBitmap {
 		source.recycle();
 		return result;
 	}
+
+	/**
+	 * Generate the default cover (a rendition of a CD). Returns a square iamge.
+	 * Both dimensions are the lesser of width and height.
+	 *
+	 * @param width The max width
+	 * @param height The max height
+	 * @return The default cover.
+	 */
+	public static Bitmap generateDefaultCover(int width, int height)
+	{
+		int size = Math.min(width, height);
+		int halfSize = size / 2;
+		int eightSize = size / 8;
+
+		Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.RGB_565);
+		LinearGradient gradient = new LinearGradient(size, 0, 0, size, 0xff646464, 0xff464646, Shader.TileMode.CLAMP);
+		RectF oval = new RectF(eightSize, 0, size - eightSize, size);
+
+		Paint paint = new Paint();
+		paint.setAntiAlias(true);
+
+		Canvas canvas = new Canvas(bitmap);
+		canvas.rotate(-45, halfSize, halfSize);
+
+		paint.setShader(gradient);
+		canvas.translate(size / 20, size / 20);
+		canvas.scale(0.9f, 0.9f);
+		canvas.drawOval(oval, paint);
+
+		paint.setShader(null);
+		paint.setColor(0xff000000);
+		canvas.translate(size / 3, size / 3);
+		canvas.scale(0.333f, 0.333f);
+		canvas.drawOval(oval, paint);
+
+		paint.setShader(gradient);
+		canvas.translate(size / 3, size / 3);
+		canvas.scale(0.333f, 0.333f);
+		canvas.drawOval(oval, paint);
+
+		return bitmap;
+	}
 }

src/org/kreed/vanilla/CoverView.java

@@ -24,7 +24,6 @@ package org.kreed.vanilla;
 
 import android.content.Context;
 import android.graphics.Bitmap;
-import android.graphics.BitmapFactory;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.os.Handler;
@@ -137,29 +136,6 @@ public final class CoverView extends View implements Handler.Callback {
 		scrollTo(getWidth(), 0);
 	}
 
-	/**
-	 * Create the cover to show when a song has no cover art. Only used in the
-	 * no info modes.
-	 *
-	 * @return The default cover, now also stored in mDefaultCover.
-	 */
-	private Bitmap generateDefaultCover()
-	{
-		int style = mCoverStyle;
-		Bitmap result = null;
-
-		if (style == CoverBitmap.STYLE_NO_INFO || style == CoverBitmap.STYLE_NO_INFO_ZOOMED) {
-			Context context = getContext();
-			Bitmap def = BitmapFactory.decodeResource(context.getResources(), R.drawable.default_cover);
-			int width = getWidth();
-			int height = getHeight();
-			result = CoverBitmap.createBitmap(context, style, def, null, width, height, null);
-		}
-
-		mDefaultCover = result;
-		return result;
-	}
-
 	@Override
 	protected void onSizeChanged(int width, int height, int oldWidth, int oldHeight)
 	{
@@ -344,14 +320,16 @@ public final class CoverView extends View implements Handler.Callback {
 		int style = mCoverStyle;
 		Context context = getContext();
 		Bitmap cover = song.getCover(context);
+		int width = getWidth();
+		int height = getHeight();
 
 		Bitmap bitmap;
 		if (cover == null && (style == CoverBitmap.STYLE_NO_INFO || style == CoverBitmap.STYLE_NO_INFO_ZOOMED)) {
+			if (mDefaultCover == null)
+				mDefaultCover = CoverBitmap.generateDefaultCover(width, height);
 			bitmap = mDefaultCover;
-			if (bitmap == null)
-				bitmap = generateDefaultCover();
 		} else {
-			bitmap = CoverBitmap.createBitmap(context, style, cover, song, getWidth(), getHeight(), reuse);
+			bitmap = CoverBitmap.createBitmap(context, style, cover, song, width, height, reuse);
 		}
 
 		mBitmaps[i] = bitmap;