Class BitmapUtils

src/com/cloudream/ishow/util/BitmapUtils.java:48–901

Utility class that deals with operations with an ImageView. refer to class #com.android.bitmap.util.BitmapUtils and # com.cloudream.ishow.util.gallery3d.common.BitmapUtils

 * {@link com.cloudream.ishow.util.gallery3d.common.BitmapUtils}
 */
public final class BitmapUtils
{

	static final Rect EMPTY_RECT = new Rect();

	static final RectF EMPTY_RECT_F = new RectF();

	/**
	 * Reusable rectangle for general internal usage
	 */
	static final RectF RECT = new RectF();

	/**
	 * Used to know the max texture size allowed to be rendered
	 */
	static int mMaxTextureSize;

	/**
	 * used to save bitmaps during state save and restore so not to reload them.
	 */
	static Pair<String, WeakReference<Bitmap>> mStateBitmap;

	public static final BitmapFactory.Options OPTION_RGBA_8888 = new BitmapFactory.Options();
	{
		// Android's Bitmap.Config.ARGB_8888 is misleading, its memory layout is RGBA, as shown in
		// JNI's macro ANDROID_BITMAP_FORMAT_RGBA_8888, and getPixel() returns ARGB format.
		OPTION_RGBA_8888.inPreferredConfig = Bitmap.Config.ARGB_8888;
		OPTION_RGBA_8888.inDither = false;
		OPTION_RGBA_8888.inMutable = true;
		OPTION_RGBA_8888.inPremultiplied = false;
	}
	
	/**
	 * Rotate the given image by reading the EXIF value of the image (URI).<br>
	 * If no rotation is required the image will not be rotated.<br>
	 * New bitmap is created and the old one is recycled.
	 */
	public static RotateBitmapResult rotateBitmapByExif(Bitmap bitmap, Context context, Uri uri)
	{
		try
		{
			File file = getFileFromUri(context, uri);
			if(file.exists())
			{
				ExifInterface ei = new ExifInterface(file.getAbsolutePath());
				return rotateBitmapByExif(bitmap, ei);
			}
		}
		catch(Exception ignored)
		{
		}
		return new RotateBitmapResult(bitmap, 0);
	}

	/**
	 * Rotate the given image by given Exif value.<br>
	 * If no rotation is required the image will not be rotated.<br>
	 * New bitmap is created and the old one is recycled.