jellyfin/Emby.Drawing/GDI/GDIImageEncoder.cs
2015-09-13 17:32:02 -04:00

257 lines
9.3 KiB
C#

using MediaBrowser.Common.IO;
using MediaBrowser.Controller.Drawing;
using MediaBrowser.Model.Drawing;
using MediaBrowser.Model.Logging;
using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using ImageFormat = MediaBrowser.Model.Drawing.ImageFormat;
namespace Emby.Drawing.GDI
{
public class GDIImageEncoder : IImageEncoder
{
private readonly IFileSystem _fileSystem;
private readonly ILogger _logger;
public GDIImageEncoder(IFileSystem fileSystem, ILogger logger)
{
_fileSystem = fileSystem;
_logger = logger;
_logger.Info("GDI image processor initialized");
}
public string[] SupportedInputFormats
{
get
{
return new[]
{
"png",
"jpeg",
"jpg",
"gif",
"bmp"
};
}
}
public ImageFormat[] SupportedOutputFormats
{
get
{
return new[] { ImageFormat.Gif, ImageFormat.Jpg, ImageFormat.Png };
}
}
public ImageSize GetImageSize(string path)
{
using (var image = Image.FromFile(path))
{
return new ImageSize
{
Width = image.Width,
Height = image.Height
};
}
}
public void CropWhiteSpace(string inputPath, string outputPath)
{
using (var image = (Bitmap)Image.FromFile(inputPath))
{
using (var croppedImage = image.CropWhitespace())
{
_fileSystem.CreateDirectory(Path.GetDirectoryName(outputPath));
using (var outputStream = _fileSystem.GetFileStream(outputPath, FileMode.Create, FileAccess.Write, FileShare.Read, false))
{
croppedImage.Save(System.Drawing.Imaging.ImageFormat.Png, outputStream, 100);
}
}
}
}
public void EncodeImage(string inputPath, string cacheFilePath, int width, int height, int quality, ImageProcessingOptions options)
{
var hasPostProcessing = !string.IsNullOrEmpty(options.BackgroundColor) || options.UnplayedCount.HasValue || options.AddPlayedIndicator || options.PercentPlayed > 0;
using (var originalImage = Image.FromFile(inputPath))
{
var newWidth = Convert.ToInt32(width);
var newHeight = Convert.ToInt32(height);
var selectedOutputFormat = options.OutputFormat;
// Graphics.FromImage will throw an exception if the PixelFormat is Indexed, so we need to handle that here
// Also, Webp only supports Format32bppArgb and Format32bppRgb
var pixelFormat = selectedOutputFormat == ImageFormat.Webp
? PixelFormat.Format32bppArgb
: PixelFormat.Format32bppPArgb;
using (var thumbnail = new Bitmap(newWidth, newHeight, pixelFormat))
{
// Mono throw an exeception if assign 0 to SetResolution
if (originalImage.HorizontalResolution > 0 && originalImage.VerticalResolution > 0)
{
// Preserve the original resolution
thumbnail.SetResolution(originalImage.HorizontalResolution, originalImage.VerticalResolution);
}
using (var thumbnailGraph = Graphics.FromImage(thumbnail))
{
thumbnailGraph.CompositingQuality = CompositingQuality.HighQuality;
thumbnailGraph.SmoothingMode = SmoothingMode.HighQuality;
thumbnailGraph.InterpolationMode = InterpolationMode.HighQualityBicubic;
thumbnailGraph.PixelOffsetMode = PixelOffsetMode.HighQuality;
thumbnailGraph.CompositingMode = !hasPostProcessing ?
CompositingMode.SourceCopy :
CompositingMode.SourceOver;
SetBackgroundColor(thumbnailGraph, options);
thumbnailGraph.DrawImage(originalImage, 0, 0, newWidth, newHeight);
DrawIndicator(thumbnailGraph, newWidth, newHeight, options);
var outputFormat = GetOutputFormat(originalImage, selectedOutputFormat);
_fileSystem.CreateDirectory(Path.GetDirectoryName(cacheFilePath));
// Save to the cache location
using (var cacheFileStream = _fileSystem.GetFileStream(cacheFilePath, FileMode.Create, FileAccess.Write, FileShare.Read, false))
{
// Save to the memory stream
thumbnail.Save(outputFormat, cacheFileStream, quality);
}
}
}
}
}
/// <summary>
/// Sets the color of the background.
/// </summary>
/// <param name="graphics">The graphics.</param>
/// <param name="options">The options.</param>
private void SetBackgroundColor(Graphics graphics, ImageProcessingOptions options)
{
var color = options.BackgroundColor;
if (!string.IsNullOrEmpty(color))
{
Color drawingColor;
try
{
drawingColor = ColorTranslator.FromHtml(color);
}
catch
{
drawingColor = ColorTranslator.FromHtml("#" + color);
}
graphics.Clear(drawingColor);
}
}
/// <summary>
/// Draws the indicator.
/// </summary>
/// <param name="graphics">The graphics.</param>
/// <param name="imageWidth">Width of the image.</param>
/// <param name="imageHeight">Height of the image.</param>
/// <param name="options">The options.</param>
private void DrawIndicator(Graphics graphics, int imageWidth, int imageHeight, ImageProcessingOptions options)
{
if (!options.AddPlayedIndicator && !options.UnplayedCount.HasValue && options.PercentPlayed.Equals(0))
{
return;
}
try
{
if (options.AddPlayedIndicator)
{
var currentImageSize = new Size(imageWidth, imageHeight);
new PlayedIndicatorDrawer().DrawPlayedIndicator(graphics, currentImageSize);
}
else if (options.UnplayedCount.HasValue)
{
var currentImageSize = new Size(imageWidth, imageHeight);
new UnplayedCountIndicator().DrawUnplayedCountIndicator(graphics, currentImageSize, options.UnplayedCount.Value);
}
if (options.PercentPlayed > 0)
{
var currentImageSize = new Size(imageWidth, imageHeight);
new PercentPlayedDrawer().Process(graphics, currentImageSize, options.PercentPlayed);
}
}
catch (Exception ex)
{
_logger.ErrorException("Error drawing indicator overlay", ex);
}
}
/// <summary>
/// Gets the output format.
/// </summary>
/// <param name="image">The image.</param>
/// <param name="outputFormat">The output format.</param>
/// <returns>ImageFormat.</returns>
private System.Drawing.Imaging.ImageFormat GetOutputFormat(Image image, ImageFormat outputFormat)
{
switch (outputFormat)
{
case ImageFormat.Bmp:
return System.Drawing.Imaging.ImageFormat.Bmp;
case ImageFormat.Gif:
return System.Drawing.Imaging.ImageFormat.Gif;
case ImageFormat.Jpg:
return System.Drawing.Imaging.ImageFormat.Jpeg;
case ImageFormat.Png:
return System.Drawing.Imaging.ImageFormat.Png;
default:
return image.RawFormat;
}
}
public void CreateImageCollage(ImageCollageOptions options)
{
double ratio = options.Width;
ratio /= options.Height;
if (ratio >= 1.4)
{
DynamicImageHelpers.CreateThumbCollage(options.InputPaths.ToList(), _fileSystem, options.OutputPath, options.Width, options.Height);
}
else if (ratio >= .9)
{
DynamicImageHelpers.CreateSquareCollage(options.InputPaths.ToList(), _fileSystem, options.OutputPath, options.Width, options.Height);
}
else
{
DynamicImageHelpers.CreateSquareCollage(options.InputPaths.ToList(), _fileSystem, options.OutputPath, options.Width, options.Width);
}
}
public void Dispose()
{
}
public string Name
{
get { return "GDI"; }
}
}
}