/// <summary>
/// Loads a non-scaled bitmap from the Assets folder into memory.
/// </summary>
/// <returns>The bitmap.</returns>
/// <param name="maxPoolSize">The maximum limit of images to pool.</param>
/// <param name="context">A context to get an AssetManager instance.</param>
/// <param name="fileName">The image file path.</param>
/// <param name="assetImageDir">The parent directory for <paramref name="fileName"/> path parameter.</param>
public Bitmap LoadBitmap(int maxPoolSize, Context context, string fileName,
string assetImageDir = null)
{
Bitmap bitmap = DecodeBitmap(maxPoolSize, context, fileName, assetImageDir);
if (Env.Debug)
{
Log.Debug(TAG, "Sync. Decoding ({0}) done. Bytes:{1}", bitmap.ToString(), bitmap.ByteCount.ToString());
TimeProfiler.LogMemInfo();
Log.Debug(TAG, "========================================");
}
return(bitmap);
}
// Once complete, see if ImageView is still around and set bitmap.
protected override void OnPostExecute(Bitmap bitmap)
{
if (imageViewReference != null && bitmap != null)
{
ImageView imageView;
if (imageViewReference.TryGetTarget(out imageView))
{
if (Env.Debug)
{
Log.Debug(TAG, "Async. Decoding ({0}) done. Bytes:{1}", bitmap.ToString(), bitmap.ByteCount.ToString());
TimeProfiler.LogMemInfo();
}
imageView.SetImageBitmap(bitmap);
}
}
}
Bitmap DecodeBitmap(int maxPoolSize, Context context, string fileName, string assetImageDir)
{
string filePath = System.IO.Path.Combine(assetImageDir ?? DataHolder.Current.Common.AssetImageDir, fileName);
BitmapFactory.Options options = null;
if (bitmapPool.TryGetOptions(maxPoolSize, filePath, out options))
{
return(options.InBitmap);
}
long started = TimeProfiler.Start();
if (options.InBitmap == null)
{
// First decode with inJustDecodeBounds=true to check dimensions
options.InJustDecodeBounds = true;
using (var stream = AssetHelper.Instance.Open(filePath))
{
BitmapFactory.DecodeStream(stream, null, options);
}
// Due to a bug in SDKs below Kitkat a scaled down version of a bitmap cannot be decoded into an existing bitmap
var ratio = (Env.KitkatSupport) ? 2 : 1;
options.OutWidth = options.OutWidth / ratio;
options.OutHeight = options.OutHeight / ratio;
Bitmap bitmap = Bitmap.CreateBitmap(options.OutWidth, options.OutHeight, options.InPreferredConfig);
options.InJustDecodeBounds = false;
options.InBitmap = bitmap;
options.InSampleSize = ratio;
}
// Decode bitmap with inSampleSize set
using (var stream = AssetHelper.Instance.Open(filePath))
{
var bitmap = BitmapFactory.DecodeStream(stream, null, options);
TimeProfiler.StopAndLog(TAG, "Decode Stream", started);
return(bitmap);
}
}
