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Diffstat (limited to 'Emby.Drawing.Net/ImageExtensions.cs')
| -rw-r--r-- | Emby.Drawing.Net/ImageExtensions.cs | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/Emby.Drawing.Net/ImageExtensions.cs b/Emby.Drawing.Net/ImageExtensions.cs deleted file mode 100644 index dec2613d0..000000000 --- a/Emby.Drawing.Net/ImageExtensions.cs +++ /dev/null @@ -1,217 +0,0 @@ -using System; -using System.Drawing; -using System.Drawing.Drawing2D; -using System.Drawing.Imaging; -using System.IO; - -namespace Emby.Drawing.Net -{ - public static class ImageExtensions - { - /// <summary> - /// Saves the image. - /// </summary> - /// <param name="outputFormat">The output format.</param> - /// <param name="image">The image.</param> - /// <param name="toStream">To stream.</param> - /// <param name="quality">The quality.</param> - public static void Save(this Image image, ImageFormat outputFormat, Stream toStream, int quality) - { - // Use special save methods for jpeg and png that will result in a much higher quality image - // All other formats use the generic Image.Save - if (ImageFormat.Jpeg.Equals(outputFormat)) - { - SaveAsJpeg(image, toStream, quality); - } - else if (ImageFormat.Png.Equals(outputFormat)) - { - image.Save(toStream, ImageFormat.Png); - } - else - { - image.Save(toStream, outputFormat); - } - } - - /// <summary> - /// Saves the JPEG. - /// </summary> - /// <param name="image">The image.</param> - /// <param name="target">The target.</param> - /// <param name="quality">The quality.</param> - public static void SaveAsJpeg(this Image image, Stream target, int quality) - { - using (var encoderParameters = new EncoderParameters(1)) - { - encoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, quality); - image.Save(target, GetImageCodecInfo("image/jpeg"), encoderParameters); - } - } - - private static readonly ImageCodecInfo[] Encoders = ImageCodecInfo.GetImageEncoders(); - - /// <summary> - /// Gets the image codec info. - /// </summary> - /// <param name="mimeType">Type of the MIME.</param> - /// <returns>ImageCodecInfo.</returns> - private static ImageCodecInfo GetImageCodecInfo(string mimeType) - { - foreach (var encoder in Encoders) - { - if (string.Equals(encoder.MimeType, mimeType, StringComparison.OrdinalIgnoreCase)) - { - return encoder; - } - } - - return Encoders.Length == 0 ? null : Encoders[0]; - } - - /// <summary> - /// Crops an image by removing whitespace and transparency from the edges - /// </summary> - /// <param name="bmp">The BMP.</param> - /// <returns>Bitmap.</returns> - /// <exception cref="System.Exception"></exception> - public static Bitmap CropWhitespace(this Bitmap bmp) - { - var width = bmp.Width; - var height = bmp.Height; - - var topmost = 0; - for (int row = 0; row < height; ++row) - { - if (IsAllWhiteRow(bmp, row, width)) - topmost = row; - else break; - } - - int bottommost = 0; - for (int row = height - 1; row >= 0; --row) - { - if (IsAllWhiteRow(bmp, row, width)) - bottommost = row; - else break; - } - - int leftmost = 0, rightmost = 0; - for (int col = 0; col < width; ++col) - { - if (IsAllWhiteColumn(bmp, col, height)) - leftmost = col; - else - break; - } - - for (int col = width - 1; col >= 0; --col) - { - if (IsAllWhiteColumn(bmp, col, height)) - rightmost = col; - else - break; - } - - if (rightmost == 0) rightmost = width; // As reached left - if (bottommost == 0) bottommost = height; // As reached top. - - var croppedWidth = rightmost - leftmost; - var croppedHeight = bottommost - topmost; - - if (croppedWidth == 0) // No border on left or right - { - leftmost = 0; - croppedWidth = width; - } - - if (croppedHeight == 0) // No border on top or bottom - { - topmost = 0; - croppedHeight = height; - } - - // Graphics.FromImage will throw an exception if the PixelFormat is Indexed, so we need to handle that here - var thumbnail = new Bitmap(croppedWidth, croppedHeight, PixelFormat.Format32bppPArgb); - - // Preserve the original resolution - TrySetResolution(thumbnail, bmp.HorizontalResolution, bmp.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 = CompositingMode.SourceCopy; - - thumbnailGraph.DrawImage(bmp, - new RectangleF(0, 0, croppedWidth, croppedHeight), - new RectangleF(leftmost, topmost, croppedWidth, croppedHeight), - GraphicsUnit.Pixel); - } - return thumbnail; - } - - /// <summary> - /// Tries the set resolution. - /// </summary> - /// <param name="bmp">The BMP.</param> - /// <param name="x">The x.</param> - /// <param name="y">The y.</param> - private static void TrySetResolution(Bitmap bmp, float x, float y) - { - if (x > 0 && y > 0) - { - bmp.SetResolution(x, y); - } - } - - /// <summary> - /// Determines whether or not a row of pixels is all whitespace - /// </summary> - /// <param name="bmp">The BMP.</param> - /// <param name="row">The row.</param> - /// <param name="width">The width.</param> - /// <returns><c>true</c> if [is all white row] [the specified BMP]; otherwise, <c>false</c>.</returns> - private static bool IsAllWhiteRow(Bitmap bmp, int row, int width) - { - for (var i = 0; i < width; ++i) - { - if (!IsWhiteSpace(bmp.GetPixel(i, row))) - { - return false; - } - } - return true; - } - - /// <summary> - /// Determines whether or not a column of pixels is all whitespace - /// </summary> - /// <param name="bmp">The BMP.</param> - /// <param name="col">The col.</param> - /// <param name="height">The height.</param> - /// <returns><c>true</c> if [is all white column] [the specified BMP]; otherwise, <c>false</c>.</returns> - private static bool IsAllWhiteColumn(Bitmap bmp, int col, int height) - { - for (var i = 0; i < height; ++i) - { - if (!IsWhiteSpace(bmp.GetPixel(col, i))) - { - return false; - } - } - return true; - } - - /// <summary> - /// Determines if a color is whitespace - /// </summary> - /// <param name="color">The color.</param> - /// <returns><c>true</c> if [is white space] [the specified color]; otherwise, <c>false</c>.</returns> - private static bool IsWhiteSpace(Color color) - { - return (color.R == 255 && color.G == 255 && color.B == 255) || color.A == 0; - } - } -} |