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handle all 8 Exif orientations

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This commit is contained in:
Colin McMillen 2023-07-25 14:48:02 -04:00
parent c461d55101
commit 4f667f2400
1 changed files with 12 additions and 4 deletions
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16
Program.cs
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@ -386,12 +386,20 @@ public static class Util {
// https://sirv.com/help/articles/rotate-photos-to-be-upright/
public static void RotateImageFromExif(Image<Rgba32> image, ushort orientation) {
if (orientation == 1) {
if (orientation <= 1) {
return;
}
if (orientation == 8) {
image.Mutate(x => x.RotateFlip(RotateMode.Rotate270, FlipMode.None));
}
var operations = new Dictionary<ushort, (RotateMode, FlipMode)> {
{ 2, (RotateMode.None, FlipMode.Horizontal) },
{ 3, (RotateMode.Rotate180, FlipMode.None) },
{ 4, (RotateMode.Rotate180, FlipMode.Horizontal) },
{ 5, (RotateMode.Rotate90, FlipMode.Vertical) },
{ 6, (RotateMode.Rotate90, FlipMode.None) },
{ 7, (RotateMode.Rotate270, FlipMode.Vertical) },
{ 8, (RotateMode.Rotate270, FlipMode.None) },
};
var (rotate, flip) = operations[orientation];
image.Mutate(x => x.RotateFlip(rotate, flip));
}
public static Texture RenderText(string text) {