| | | 1 | | using System; |
| | | 2 | | |
| | | 3 | | namespace MediaBrowser.Model.Drawing |
| | | 4 | | { |
| | | 5 | | /// <summary> |
| | | 6 | | /// Class DrawingUtils. |
| | | 7 | | /// </summary> |
| | | 8 | | public static class DrawingUtils |
| | | 9 | | { |
| | | 10 | | /// <summary> |
| | | 11 | | /// Resizes a set of dimensions. |
| | | 12 | | /// </summary> |
| | | 13 | | /// <param name="size">The original size object.</param> |
| | | 14 | | /// <param name="width">A new fixed width, if desired.</param> |
| | | 15 | | /// <param name="height">A new fixed height, if desired.</param> |
| | | 16 | | /// <param name="maxWidth">A max fixed width, if desired.</param> |
| | | 17 | | /// <param name="maxHeight">A max fixed height, if desired.</param> |
| | | 18 | | /// <returns>A new size object.</returns> |
| | | 19 | | public static ImageDimensions Resize( |
| | | 20 | | ImageDimensions size, |
| | | 21 | | int width, |
| | | 22 | | int height, |
| | | 23 | | int maxWidth, |
| | | 24 | | int maxHeight) |
| | | 25 | | { |
| | 5 | 26 | | int newWidth = size.Width; |
| | 5 | 27 | | int newHeight = size.Height; |
| | | 28 | | |
| | 5 | 29 | | if (width > 0 && height > 0) |
| | | 30 | | { |
| | 1 | 31 | | newWidth = width; |
| | 1 | 32 | | newHeight = height; |
| | | 33 | | } |
| | 4 | 34 | | else if (height > 0) |
| | | 35 | | { |
| | 0 | 36 | | newWidth = GetNewWidth(newHeight, newWidth, height); |
| | 0 | 37 | | newHeight = height; |
| | | 38 | | } |
| | 4 | 39 | | else if (width > 0) |
| | | 40 | | { |
| | 1 | 41 | | newHeight = GetNewHeight(newHeight, newWidth, width); |
| | 1 | 42 | | newWidth = width; |
| | | 43 | | } |
| | | 44 | | |
| | 5 | 45 | | if (maxHeight > 0 && maxHeight < newHeight) |
| | | 46 | | { |
| | 0 | 47 | | newWidth = GetNewWidth(newHeight, newWidth, maxHeight); |
| | 0 | 48 | | newHeight = maxHeight; |
| | | 49 | | } |
| | | 50 | | |
| | 5 | 51 | | if (maxWidth > 0 && maxWidth < newWidth) |
| | | 52 | | { |
| | 1 | 53 | | newHeight = GetNewHeight(newHeight, newWidth, maxWidth); |
| | 1 | 54 | | newWidth = maxWidth; |
| | | 55 | | } |
| | | 56 | | |
| | 5 | 57 | | return new ImageDimensions(newWidth, newHeight); |
| | | 58 | | } |
| | | 59 | | |
| | | 60 | | /// <summary> |
| | | 61 | | /// Scale down to fill box. |
| | | 62 | | /// Returns original size if both width and height are null or zero. |
| | | 63 | | /// </summary> |
| | | 64 | | /// <param name="size">The original size object.</param> |
| | | 65 | | /// <param name="fillWidth">A new fixed width, if desired.</param> |
| | | 66 | | /// <param name="fillHeight">A new fixed height, if desired.</param> |
| | | 67 | | /// <returns>A new size object or size.</returns> |
| | | 68 | | public static ImageDimensions ResizeFill( |
| | | 69 | | ImageDimensions size, |
| | | 70 | | int? fillWidth, |
| | | 71 | | int? fillHeight) |
| | | 72 | | { |
| | | 73 | | // Return original size if input is invalid. |
| | 5 | 74 | | if ((fillWidth is null || fillWidth == 0) |
| | 5 | 75 | | && (fillHeight is null || fillHeight == 0)) |
| | | 76 | | { |
| | 4 | 77 | | return size; |
| | | 78 | | } |
| | | 79 | | |
| | 1 | 80 | | if (fillWidth is null || fillWidth == 0) |
| | | 81 | | { |
| | 0 | 82 | | fillWidth = 1; |
| | | 83 | | } |
| | | 84 | | |
| | 1 | 85 | | if (fillHeight is null || fillHeight == 0) |
| | | 86 | | { |
| | 0 | 87 | | fillHeight = 1; |
| | | 88 | | } |
| | | 89 | | |
| | 1 | 90 | | double widthRatio = size.Width / (double)fillWidth; |
| | 1 | 91 | | double heightRatio = size.Height / (double)fillHeight; |
| | 1 | 92 | | double scaleRatio = Math.Min(widthRatio, heightRatio); |
| | | 93 | | |
| | | 94 | | // Clamp to current size. |
| | 1 | 95 | | if (scaleRatio < 1) |
| | | 96 | | { |
| | 1 | 97 | | return size; |
| | | 98 | | } |
| | | 99 | | |
| | 0 | 100 | | int newWidth = Convert.ToInt32(Math.Ceiling(size.Width / scaleRatio)); |
| | 0 | 101 | | int newHeight = Convert.ToInt32(Math.Ceiling(size.Height / scaleRatio)); |
| | | 102 | | |
| | 0 | 103 | | return new ImageDimensions(newWidth, newHeight); |
| | | 104 | | } |
| | | 105 | | |
| | | 106 | | /// <summary> |
| | | 107 | | /// Scales a size down uniformly until it fits inside a bounding box. |
| | | 108 | | /// Returns the original size if it already fits, so this never upscales. |
| | | 109 | | /// </summary> |
| | | 110 | | /// <param name="size">The size object.</param> |
| | | 111 | | /// <param name="boundingBox">The box the result has to fit inside.</param> |
| | | 112 | | /// <returns>A new size object, or <paramref name="size"/> if it already fits.</returns> |
| | | 113 | | public static ImageDimensions ScaleDownToFit(ImageDimensions size, ImageDimensions boundingBox) |
| | | 114 | | { |
| | 13 | 115 | | if (size.Width <= 0 || size.Height <= 0 || boundingBox.Width <= 0 || boundingBox.Height <= 0) |
| | | 116 | | { |
| | 2 | 117 | | return size; |
| | | 118 | | } |
| | | 119 | | |
| | 11 | 120 | | double widthRatio = size.Width / (double)boundingBox.Width; |
| | 11 | 121 | | double heightRatio = size.Height / (double)boundingBox.Height; |
| | 11 | 122 | | double scaleRatio = Math.Max(widthRatio, heightRatio); |
| | | 123 | | |
| | 11 | 124 | | if (scaleRatio <= 1) |
| | | 125 | | { |
| | 5 | 126 | | return size; |
| | | 127 | | } |
| | | 128 | | |
| | 6 | 129 | | var newWidth = Math.Clamp(Convert.ToInt32(Math.Round(size.Width / scaleRatio)), 1, boundingBox.Width); |
| | 6 | 130 | | var newHeight = Math.Clamp(Convert.ToInt32(Math.Round(size.Height / scaleRatio)), 1, boundingBox.Height); |
| | | 131 | | |
| | 6 | 132 | | return new ImageDimensions(newWidth, newHeight); |
| | | 133 | | } |
| | | 134 | | |
| | | 135 | | /// <summary> |
| | | 136 | | /// Gets the new width. |
| | | 137 | | /// </summary> |
| | | 138 | | /// <param name="currentHeight">Height of the current.</param> |
| | | 139 | | /// <param name="currentWidth">Width of the current.</param> |
| | | 140 | | /// <param name="newHeight">The new height.</param> |
| | | 141 | | /// <returns>The new width.</returns> |
| | | 142 | | private static int GetNewWidth(int currentHeight, int currentWidth, int newHeight) |
| | 0 | 143 | | => Convert.ToInt32((double)newHeight / currentHeight * currentWidth); |
| | | 144 | | |
| | | 145 | | /// <summary> |
| | | 146 | | /// Gets the new height. |
| | | 147 | | /// </summary> |
| | | 148 | | /// <param name="currentHeight">Height of the current.</param> |
| | | 149 | | /// <param name="currentWidth">Width of the current.</param> |
| | | 150 | | /// <param name="newWidth">The new width.</param> |
| | | 151 | | /// <returns>System.Double.</returns> |
| | | 152 | | private static int GetNewHeight(int currentHeight, int currentWidth, int newWidth) |
| | 2 | 153 | | => Convert.ToInt32((double)newWidth / currentWidth * currentHeight); |
| | | 154 | | } |
| | | 155 | | } |