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