internal CompositionImage GetCompositionImage(string cacheKey)
{
// create image and add to cache
BitmapSource image = CreateImage();
// Freeze the bitmap - this means any thread can access it, as well
// as perhaps providing some performance benefit.
if (image != null)
image.Freeze();
ImageProperties properties = new ImageProperties
{
UniqueKey = cacheKey,
CacheProviderKey = Util.Util.CalculateShaHash(cacheKey),
ColourDepth = this.ColourDepth,
Format = this.ImageFormat,
JpegCompressionLevel = this.JpegCompressionLevel
};
if (image != null)
{
properties.Width = image.PixelWidth;
properties.Height = image.PixelHeight;
}
properties.IsImagePresent = (image != null);
return new CompositionImage(properties, image);
}
public CompositionImage(ImageProperties properties, BitmapSource image)
{
Properties = properties;
Image = image;
}
public static string GetFileName(ImageProperties imageProperties)
{
return Util.Util.CalculateShaHash(imageProperties.UniqueKey);
}
public Task<GeneratedImage> GenerateImageAsync()
{
// Create image in separate thread, and wait for result.
var context = new ImageGenerationContext(HttpContext.Current);
return new TaskFactory(DispatcherTaskScheduler.Default)
.StartNew(() =>
{
var image = CreateImage(context);
var properties = new ImageProperties
{
ColorDepth = ColorDepth,
Format = ImageFormat,
JpegCompressionLevel = JpegCompressionLevel
};
if (image != null)
{
image.Freeze();
properties.Width = image.PixelWidth;
properties.Height = image.PixelHeight;
}
properties.IsImagePresent = (image != null);
return new GeneratedImage(properties, image);
});
}
public GeneratedImage GenerateImage()
{
// create image
BitmapSource image = CreateImage();
var properties = new ImageProperties
{
ColourDepth = ColourDepth,
Format = ImageFormat,
JpegCompressionLevel = JpegCompressionLevel
};
if (image != null)
{
properties.Width = image.PixelWidth;
properties.Height = image.PixelHeight;
}
properties.IsImagePresent = (image != null);
return new GeneratedImage(properties, image);
}
public GeneratedImage(ImageProperties properties, BitmapSource image)
{
Properties = properties;
Image = image;
}
public GeneratedImage(ImageProperties properties, BitmapSource image)
{
Properties = properties;
Image = image;
}
