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#region Header
//
// Project: WriteableBitmapEx - WriteableBitmap extensions
// Description: Collection of extension methods for the WriteableBitmap class.
//
// Changed by: $Author: unknown $
// Changed on: $Date: 2015-03-05 18:18:24 +0100 (Do, 05 Mrz 2015) $
// Changed in: $Revision: 113191 $
// Project: $URL: https://writeablebitmapex.svn.codeplex.com/svn/trunk/Source/WriteableBitmapEx/BitmapFactory.cs $
// Id: $Id: BitmapFactory.cs 113191 2015-03-05 17:18:24Z unknown $
//
//
// Copyright © 2009-2015 Rene Schulte and WriteableBitmapEx Contributors
//
// This code is open source. Please read the License.txt for details. No worries, we won't sue you! ;)
//
#endregion
using System;
using System.IO;
using System.Reflection;
#if NETFX_CORE
using Windows.Storage;
using Windows.Storage.Streams;
using System.Threading.Tasks;
using Windows.Graphics.Imaging;
using System.Runtime.InteropServices.WindowsRuntime;
namespace Windows.UI.Xaml.Media.Imaging
#else
namespace System.Windows.Media.Imaging
#endif
{
/// <summary>
/// Cross-platform factory for WriteableBitmaps
/// </summary>
internal static class BitmapFactory
{
/// <summary>
/// Creates a new WriteableBitmap of the specified width and height
/// </summary>
/// <remarks>For WPF the default DPI is 96x96 and PixelFormat is Pbgra32</remarks>
/// <param name="pixelWidth"></param>
/// <param name="pixelHeight"></param>
/// <returns></returns>
internal static WriteableBitmap New(int pixelWidth, int pixelHeight)
{
if (pixelHeight < 1) pixelHeight = 1;
if (pixelWidth < 1) pixelWidth = 1;
#if SILVERLIGHT
return new WriteableBitmap(pixelWidth, pixelHeight);
#elif WPF
return new WriteableBitmap(pixelWidth, pixelHeight, 96.0, 96.0, PixelFormats.Pbgra32, null);
#elif NETFX_CORE
return new WriteableBitmap(pixelWidth, pixelHeight);
#endif
}
#if WPF
/// <summary>
/// Converts the input BitmapSource to the Pbgra32 format WriteableBitmap which is internally used by the WriteableBitmapEx.
/// </summary>
/// <param name="source">The source bitmap.</param>
/// <returns></returns>
internal static WriteableBitmap ConvertToPbgra32Format(BitmapSource source)
{
// Convert to Pbgra32 if it's a different format
if (source.Format == PixelFormats.Pbgra32)
{
return new WriteableBitmap(source);
}
var formatedBitmapSource = new FormatConvertedBitmap();
formatedBitmapSource.BeginInit();
formatedBitmapSource.Source = source;
formatedBitmapSource.DestinationFormat = PixelFormats.Pbgra32;
formatedBitmapSource.EndInit();
return new WriteableBitmap(formatedBitmapSource);
}
#endif
#if NETFX_CORE
/// <summary>
/// Loads an image from the applications content and returns a new WriteableBitmap.
/// </summary>
/// <param name="uri">The URI to the content file.</param>
/// <param name="pixelFormat">The pixel format of the stream data. If Unknown is provided as param, the default format of the BitmapDecoder is used.</param>
/// <returns>A new WriteableBitmap containing the pixel data.</returns>
internal static async Task<WriteableBitmap> FromContent(Uri uri, BitmapPixelFormat pixelFormat = BitmapPixelFormat.Unknown)
{
// Decode pixel data
var file = await StorageFile.GetFileFromApplicationUriAsync(uri);
using (var stream = await file.OpenAsync(FileAccessMode.Read))
{
return await FromStream(stream);
}
}
/// <summary>
/// Loads the data from an image stream and returns a new WriteableBitmap.
/// </summary>
/// <param name="stream">The stream with the image data.</param>
/// <param name="pixelFormat">The pixel format of the stream data. If Unknown is provided as param, the default format of the BitmapDecoder is used.</param>
/// <returns>A new WriteableBitmap containing the pixel data.</returns>
internal static async Task<WriteableBitmap> FromStream(Stream stream, BitmapPixelFormat pixelFormat = BitmapPixelFormat.Unknown)
{
using (var dstStream = new InMemoryRandomAccessStream())
{
await RandomAccessStream.CopyAsync(stream.AsInputStream(), dstStream);
return await FromStream(dstStream);
}
}
/// <summary>
/// Loads the data from an image stream and returns a new WriteableBitmap.
/// </summary>
/// <param name="stream">The stream with the image data.</param>
/// <param name="pixelFormat">The pixel format of the stream data. If Unknown is provided as param, the default format of the BitmapDecoder is used.</param>
/// <returns>A new WriteableBitmap containing the pixel data.</returns>
internal static async Task<WriteableBitmap> FromStream(IRandomAccessStream stream, BitmapPixelFormat pixelFormat = BitmapPixelFormat.Unknown)
{
var decoder = await BitmapDecoder.CreateAsync(stream);
var transform = new BitmapTransform();
if (pixelFormat == BitmapPixelFormat.Unknown)
{
pixelFormat = decoder.BitmapPixelFormat;
}
var pixelData = await decoder.GetPixelDataAsync(pixelFormat, decoder.BitmapAlphaMode, transform, ExifOrientationMode.RespectExifOrientation, ColorManagementMode.ColorManageToSRgb);
var pixels = pixelData.DetachPixelData();
// Copy to WriteableBitmap
var bmp = new WriteableBitmap((int)decoder.OrientedPixelWidth, (int)decoder.OrientedPixelHeight);
using (var bmpStream = bmp.PixelBuffer.AsStream())
{
bmpStream.Seek(0, SeekOrigin.Begin);
bmpStream.Write(pixels, 0, (int)bmpStream.Length);
return bmp;
}
}
/// <summary>
/// Loads the data from a pixel buffer like the RenderTargetBitmap provides and returns a new WriteableBitmap.
/// </summary>
/// <param name="pixelBuffer">The source pixel buffer with the image data.</param>
/// <param name="width">The width of the image data.</param>
/// <param name="height">The height of the image data.</param>
/// <returns>A new WriteableBitmap containing the pixel data.</returns>
internal static async Task<WriteableBitmap> FromPixelBuffer(IBuffer pixelBuffer, int width, int height)
{
// Copy to WriteableBitmap
var bmp = new WriteableBitmap(width, height);
using (var srcStream = pixelBuffer.AsStream())
{
using (var destStream = bmp.PixelBuffer.AsStream())
{
srcStream.Seek(0, SeekOrigin.Begin);
await srcStream.CopyToAsync(destStream);
}
return bmp;
}
}
#else
/// <summary>
/// Loads an image from the applications resource file and returns a new WriteableBitmap.
/// </summary>
/// <param name="relativePath">Only the relative path to the resource file. The assembly name is retrieved automatically.</param>
/// <returns>A new WriteableBitmap containing the pixel data.</returns>
internal static WriteableBitmap FromResource(string relativePath)
{
var fullName = Assembly.GetCallingAssembly().FullName;
var asmName = new AssemblyName(fullName).Name;
return FromContent(asmName + ";component/" + relativePath);
}
/// <summary>
/// Loads an image from the applications content and returns a new WriteableBitmap.
/// </summary>
/// <param name="relativePath">Only the relative path to the content file.</param>
/// <returns>A new WriteableBitmap containing the pixel data.</returns>
internal static WriteableBitmap FromContent(string relativePath)
{
using (var bmpStream = Application.GetResourceStream(new Uri(relativePath, UriKind.Relative)).Stream)
{
return FromStream(bmpStream);
}
}
/// <summary>
/// Loads the data from an image stream and returns a new WriteableBitmap.
/// </summary>
/// <param name="stream">The stream with the image data.</param>
/// <returns>A new WriteableBitmap containing the pixel data.</returns>
internal static WriteableBitmap FromStream(Stream stream)
{
var bmpi = new BitmapImage();
#if SILVERLIGHT
bmpi.SetSource(stream);
bmpi.CreateOptions = BitmapCreateOptions.None;
#elif WPF
bmpi.BeginInit();
bmpi.CreateOptions = BitmapCreateOptions.None;
bmpi.StreamSource = stream;
bmpi.EndInit();
#endif
var bmp = new WriteableBitmap(bmpi);
bmpi.UriSource = null;
return bmp;
}
#endif
}
}
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