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feature: add export GIF as backup

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This commit is contained in:
Tsanie Lily 2020-05-15 23:06:29 +08:00
parent 44ac3f5ba5
commit 8433b44d4f
3 changed files with 49 additions and 4 deletions
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2
Pixiview/Illust/ViewIllustPage.xaml.cs
View File

@ -614,7 +614,7 @@ namespace Pixiview.Illust
} }
} }
var success = await Task.Run(ugoira.ExportVideo); var success = await Task.Run(ugoira.ExportVideo); // ugoira.ExportGif
if (success != null) if (success != null)
{ {
var result = await FileStore.SaveVideoToGalleryAsync(success); var result = await FileStore.SaveVideoToGalleryAsync(success);

4
Pixiview/Utils/Stores.cs
View File

@ -138,9 +138,9 @@ namespace Pixiview.Utils
} }
} }
public static string GetUgoiraVideoPath(string url) public static string GetUgoiraPath(string url, string ext)
{ {
return Path.Combine(PersonalFolder, ugoiraFolder, Path.GetFileNameWithoutExtension(url) + ".mp4"); return Path.Combine(PersonalFolder, ugoiraFolder, Path.GetFileNameWithoutExtension(url) + ext);
} }
private static T ReadObject<T>(string file) private static T ReadObject<T>(string file)

47
Pixiview/Utils/Ugoira.cs
View File

@ -402,7 +402,7 @@ namespace Pixiview.Utils
return null; return null;
} }
var file = Stores.GetUgoiraVideoPath(ugoira.originalSrc); var file = Stores.GetUgoiraPath(ugoira.originalSrc, ".mp4");
if (File.Exists(file)) if (File.Exists(file))
{ {
File.Delete(file); File.Delete(file);
@ -490,6 +490,51 @@ namespace Pixiview.Utils
} }
return null; return null;
} }
public Task<string> ExportGif()
{
if (ugoira == null || ugoira.frames.Any(f => f.Incompleted))
{
return null;
}
var file = Stores.GetUgoiraPath(ugoira.originalSrc, ".gif");
if (File.Exists(file))
{
File.Delete(file);
}
var fileURL = NSUrl.FromFilename(file);
var dictFile = new NSMutableDictionary();
var gifDictionaryFile = new NSMutableDictionary
{
{ ImageIO.CGImageProperties.GIFLoopCount, NSNumber.FromFloat(0f) }
};
dictFile.Add(ImageIO.CGImageProperties.GIFDictionary, gifDictionaryFile);
var dictFrame = new NSMutableDictionary();
var gifDictionaryFrame = new NSMutableDictionary
{
{ ImageIO.CGImageProperties.GIFDelayTime, NSNumber.FromFloat(ugoira.frames[0].delay / 1000f) }
};
dictFrame.Add(ImageIO.CGImageProperties.GIFDictionary, gifDictionaryFrame);
var task = new TaskCompletionSource<string>();
Xamarin.Essentials.MainThread.BeginInvokeOnMainThread(() =>
{
var images = ugoira.frames.Select(f => UIImage.FromFile(f.FilePath)).ToArray();
var imageDestination = ImageIO.CGImageDestination.Create(fileURL, MobileCoreServices.UTType.GIF, images.Length);
imageDestination.SetProperties(dictFile);
for (int i = 0; i < images.Length; i++)
{
imageDestination.AddImage(images[i].CGImage, dictFrame);
}
imageDestination.Close();
task.SetResult(file);
});
return task.Task;
}
#endif #endif
} }