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Improve GIF efficiency #993

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ema
2024-12-20 19:28:23 +08:00
parent 51a7fe0c7b
commit 21de0643ff
1 changed files with 53 additions and 14 deletions
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67
QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/Providers/GifProvider.cs
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@@ -1,4 +1,4 @@
// Copyright © 2018 Paddy Xu
// Copyright © 2024 QL-Win Contributors
//
// This file is part of QuickLook program.
//
@@ -20,6 +20,8 @@ using QuickLook.Common.Helpers;
using QuickLook.Common.Plugin;
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Threading.Tasks;
using System.Windows.Media.Animation;
using System.Windows.Media.Imaging;
@@ -29,11 +31,17 @@ namespace QuickLook.Plugin.ImageViewer.AnimatedImage.Providers;
internal class GifProvider : AnimationProvider
{
private Bitmap _fileHandle;
private readonly int FRAME_DELAY_TAG = 0x5100;
private Stream _stream;
private Bitmap _bitmap;
private BitmapSource _frame;
private bool _isPlaying;
private NativeProvider _nativeProvider;
private int _frameCount = 0;
private int _frameIndex = 0;
public GifProvider(Uri path, MetaProvider meta, ContextObject contextObject) : base(path, meta, contextObject)
{
if (!ImageAnimator.CanAnimate(Image.FromFile(path.LocalPath)))
@@ -42,15 +50,22 @@ internal class GifProvider : AnimationProvider
return;
}
_fileHandle = (Bitmap)Image.FromFile(path.LocalPath);
_stream = new FileStream(path.LocalPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite | FileShare.Delete);
_bitmap = new Bitmap(_stream);
_fileHandle.SetResolution(DisplayDeviceHelper.DefaultDpi * DisplayDeviceHelper.GetCurrentScaleFactor().Horizontal,
_bitmap.SetResolution(DisplayDeviceHelper.DefaultDpi * DisplayDeviceHelper.GetCurrentScaleFactor().Horizontal,
DisplayDeviceHelper.DefaultDpi * DisplayDeviceHelper.GetCurrentScaleFactor().Vertical);
Animator = new Int32AnimationUsingKeyFrames { RepeatBehavior = RepeatBehavior.Forever };
Animator.KeyFrames.Add(new DiscreteInt32KeyFrame(0, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(0))));
Animator.KeyFrames.Add(new DiscreteInt32KeyFrame(1, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(10))));
Animator.KeyFrames.Add(new DiscreteInt32KeyFrame(2, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(20))));
_frameCount = _bitmap.GetFrameCount(FrameDimension.Time);
var frameDelayData = _bitmap.GetPropertyItem(FRAME_DELAY_TAG)?.Value;
for (int i = 0; i < _frameCount; i++)
{
var frameDelays = BitConverter.ToInt32(frameDelayData, i * 4) * 10; // in millisecond
Animator.KeyFrames.Add(new LinearInt32KeyFrame(i, KeyTime.FromTimeSpan(TimeSpan.FromMilliseconds(frameDelays))));
}
}
public override void Dispose()
@@ -58,10 +73,12 @@ internal class GifProvider : AnimationProvider
_nativeProvider?.Dispose();
_nativeProvider = null;
ImageAnimator.StopAnimate(_fileHandle, OnFrameChanged);
_fileHandle?.Dispose();
ImageAnimator.StopAnimate(_bitmap, OnFrameChanged);
_stream?.Dispose();
_bitmap?.Dispose();
_fileHandle = null;
_bitmap = null;
_stream = null;
_frame = null;
}
@@ -72,7 +89,7 @@ internal class GifProvider : AnimationProvider
return new Task<BitmapSource>(() =>
{
_frame = _fileHandle.ToBitmapSource();
_frame = _bitmap.ToBitmapSource();
return _frame;
});
}
@@ -87,7 +104,7 @@ internal class GifProvider : AnimationProvider
if (!_isPlaying)
{
_isPlaying = true;
ImageAnimator.Animate(_fileHandle, OnFrameChanged);
ImageAnimator.Animate(_bitmap, OnFrameChanged);
}
return _frame;
@@ -96,7 +113,29 @@ internal class GifProvider : AnimationProvider
private void OnFrameChanged(object sender, EventArgs e)
{
ImageAnimator.UpdateFrames();
_frame = _fileHandle.ToBitmapSource();
_frameIndex++;
if (_frameIndex >= _frameCount) _frameIndex = 0;
_bitmap.SetActiveTimeFrame(_frameIndex);
_frame = _bitmap.ToBitmapSource();
}
}
file static class GifBitmapExtension
{
/// <summary>
/// Sets the active frame of the bitmap using <see cref="FrameDimension.Time"/>.
/// </summary>
public static void SetActiveTimeFrame(this Bitmap bmp, int frameIndex)
{
if (bmp == null || frameIndex < 0) return;
var frameCount = bmp.GetFrameCount(FrameDimension.Time);
// Check if frame index is greater than upper limit
if (frameIndex >= frameCount) return;
// Set active frame index
bmp.SelectActiveFrame(FrameDimension.Time, frameIndex);
}
}