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using MediaBrowser.Controller.Entities;
using MediaBrowser.Model.Entities;
using System;
using System.ComponentModel.Composition;
using System.Drawing;
using System.Drawing.Drawing2D;
namespace MediaBrowser.Controller.Drawing
{
/// <summary>
/// Provides a base image processor class that plugins can use to process images as they are being writen to http responses
/// Since this is completely modular with MEF, a plugin only needs to have a subclass in their assembly with the following attribute on the class:
/// [Export(typeof(BaseImageProcessor))]
/// This will require a reference to System.ComponentModel.Composition
/// </summary>
public abstract class BaseImageProcessor
{
/// <summary>
/// Processes an image for a BaseEntity
/// </summary>
/// <param name="originalImage">The original Image, before re-sizing</param>
/// <param name="bitmap">The bitmap holding the original image, after re-sizing</param>
/// <param name="graphics">The graphics surface on which the output is drawn</param>
/// <param name="entity">The entity that owns the image</param>
/// <param name="imageType">The image type</param>
/// <param name="imageIndex">The image index (currently only used with backdrops)</param>
public abstract void ProcessImage(Image originalImage, Bitmap bitmap, Graphics graphics, BaseEntity entity, ImageType imageType, int imageIndex);
/// <summary>
/// If true, the image output format will be forced to png, resulting in an output size that will generally run larger than jpg
/// If false, the original image format is preserved.
/// </summary>
public virtual bool RequiresTransparency
{
get
{
return false;
}
}
/// <summary>
/// Determines if the image processor is configured to process the specified entity, image type and image index
/// This will aid http response caching so that we don't invalidate image caches when we don't have to
/// </summary>
public abstract bool IsConfiguredToProcess(BaseEntity entity, ImageType imageType, int imageIndex);
/// <summary>
/// This is used for caching purposes, since a configuration change needs to invalidate a user's image cache
/// If the image processor is hosted within a plugin then this should be the plugin ConfigurationDateLastModified
/// </summary>
public abstract DateTime ProcessingConfigurationDateLastModifiedUtc { get; }
}
/// <summary>
/// This is demo-ware and should be deleted eventually
/// </summary>
//[Export(typeof(BaseImageProcessor))]
public class MyRoundedCornerImageProcessor : BaseImageProcessor
{
public override void ProcessImage(Image originalImage, Bitmap bitmap, Graphics graphics, BaseEntity entity, ImageType imageType, int imageIndex)
{
var CornerRadius = 20;
graphics.Clear(Color.Transparent);
using (GraphicsPath gp = new GraphicsPath())
{
gp.AddArc(0, 0, CornerRadius, CornerRadius, 180, 90);
gp.AddArc(0 + bitmap.Width - CornerRadius, 0, CornerRadius, CornerRadius, 270, 90);
gp.AddArc(0 + bitmap.Width - CornerRadius, 0 + bitmap.Height - CornerRadius, CornerRadius, CornerRadius, 0, 90);
gp.AddArc(0, 0 + bitmap.Height - CornerRadius, CornerRadius, CornerRadius, 90, 90);
graphics.SetClip(gp);
graphics.DrawImage(originalImage, 0, 0, bitmap.Width, bitmap.Height);
}
}
public override bool RequiresTransparency
{
get
{
return true;
}
}
public override DateTime ProcessingConfigurationDateLastModifiedUtc
{
get
{
// This will result in a situation where images are never cached, but again, this is a prototype
return DateTime.UtcNow;
}
}
public override bool IsConfiguredToProcess(BaseEntity entity, ImageType imageType, int imageIndex)
{
return true;
}
}
}
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