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using System; |
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using System.Collections.Generic; |
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using System.IO; |
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using Oni.Imaging; |
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|
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namespace Oni.Motoko |
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{ |
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internal static class TextureUtils |
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{ |
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public static SurfaceFormat ToSurfaceFormat(this TextureFormat format) |
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{ |
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switch (format) |
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{ |
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case TextureFormat.BGRA4444: |
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return SurfaceFormat.BGRA4444; |
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|
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case TextureFormat.BGR555: |
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return SurfaceFormat.BGRX5551; |
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|
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case TextureFormat.BGRA5551: |
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return SurfaceFormat.BGRA5551; |
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|
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case TextureFormat.RGBA: |
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return SurfaceFormat.RGBA; |
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|
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case TextureFormat.BGR: |
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return SurfaceFormat.BGRX; |
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|
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case TextureFormat.DXT1: |
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return SurfaceFormat.DXT1; |
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|
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default: |
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throw new NotSupportedException(string.Format("Texture format {0} is not supported", format)); |
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} |
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} |
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|
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public static Surface LoadImage(string filePath) |
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{ |
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var surfaces = new List<Surface>(); |
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|
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switch (Path.GetExtension(filePath).ToLowerInvariant()) |
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{ |
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case ".tga": |
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surfaces.Add(TgaReader.Read(filePath)); |
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break; |
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default: |
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#if !NETCORE |
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surfaces.Add(SysReader.Read(filePath)); |
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#endif |
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break; |
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} |
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|
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if (surfaces.Count == 0) |
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throw new InvalidDataException(string.Format("Could not load image '{0}'", filePath)); |
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|
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return surfaces[0]; |
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} |
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|
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public static int RoundToPowerOf2(int value) |
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{ |
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if (value <= 2) |
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return value; |
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|
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int hsb = 0; |
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|
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for (int x = value; x > 1; hsb++) |
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x >>= 1; |
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|
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// |
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// TODO would be nice to round up for cases like 127 |
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// But that require to upscale the image and currently the image |
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// resizing code doesn't handle upscaling. |
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// |
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|
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//return 1 << (hsb + ((value >> (hsb - 1)) & 1)); |
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|
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return 1 << hsb; |
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} |
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} |
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} |
