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Use my home-made GIF and APNG animator. It's really save CPU compared to previous one!

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Paddy Xu
2017-07-31 00:14:21 +03:00
parent 071a3b4f22
commit 2f12127cc9
12 changed files with 658 additions and 33 deletions
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108
QuickLook.Plugin/QuickLook.Plugin.ImageViewer/AnimatedImage/APNGAnimationProvider.cs Normal file
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// Copyright © 2017 Paddy Xu
//
// This file is part of QuickLook program.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
using System;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Media.Imaging;
using LibAPNG;
namespace QuickLook.Plugin.ImageViewer.AnimatedImage
{
internal class APNGAnimationProvider : IAnimationProvider
{
public void GetAnimator(ObjectAnimationUsingKeyFrames animator, string path)
{
var decoder = new APNGBitmap(path);
if (decoder.IsSimplePNG)
{
animator.KeyFrames.Add(
new DiscreteObjectKeyFrame(decoder.DefaultImage.GetBitmapSource(), TimeSpan.Zero));
animator.Duration = Duration.Forever;
return;
}
var clock = TimeSpan.Zero;
var header = decoder.IHDRChunk;
Frame prevFrame = null;
BitmapSource prevRenderedFrame = null;
foreach (var rawFrame in decoder.Frames)
{
var frame = MakeFrame(header, rawFrame, prevFrame, prevRenderedFrame);
prevFrame = rawFrame;
prevRenderedFrame = frame;
var delay = TimeSpan.FromSeconds(
(double) rawFrame.fcTLChunk.DelayNum /
(rawFrame.fcTLChunk.DelayDen == 0 ? 100 : rawFrame.fcTLChunk.DelayDen));
animator.KeyFrames.Add(new DiscreteObjectKeyFrame(frame, clock));
clock += delay;
}
animator.Duration = clock;
animator.RepeatBehavior = RepeatBehavior.Forever;
}
private static BitmapSource MakeFrame(IHDRChunk header, Frame rawFrame, Frame previousFrame,
BitmapSource previousRenderedFrame)
{
var visual = new DrawingVisual();
using (var context = visual.RenderOpen())
{
switch (rawFrame.fcTLChunk.DisposeOp)
{
case DisposeOps.APNGDisposeOpNone:
// restore previousRenderedFrame
//if (previousRenderedFrame != null)
//{
// var fullRect = new Rect(0, 0, header.Width, header.Height);
// context.DrawImage(previousRenderedFrame, fullRect);
//}
break;
case DisposeOps.APNGDisposeOpPrevious:
// restore previousFrame
if (previousFrame != null)
{
var pFrameRect = new Rect(previousFrame.fcTLChunk.XOffset,
previousFrame.fcTLChunk.YOffset,
previousFrame.fcTLChunk.Width, previousFrame.fcTLChunk.Height);
context.DrawImage(previousFrame.GetBitmapSource(), pFrameRect);
}
break;
case DisposeOps.APNGDisposeOpBackground:
// do nothing
break;
}
// draw current frame
var frameRect = new Rect(rawFrame.fcTLChunk.XOffset, rawFrame.fcTLChunk.YOffset,
rawFrame.fcTLChunk.Width, rawFrame.fcTLChunk.Height);
context.DrawImage(rawFrame.GetBitmapSource(), frameRect);
}
var bitmap = new RenderTargetBitmap(
header.Width, header.Height,
96, 96,
PixelFormats.Pbgra32);
bitmap.Render(visual);
return bitmap;
}
}
}