//----------------------------------------------------------------------------------------------------------------------
void DrawPreviewImage(ref PreviewDrawInfo drawInfo, TimelineClip clip,
RenderCachePlayableAsset renderCachePlayableAsset)
{
double normalizedLocalTime = drawInfo.LocalTime / clip.duration;
IList <string> imageFileNames = renderCachePlayableAsset.GetImageFileNames();
Assert.IsNotNull(imageFileNames);
int count = imageFileNames.Count;
Assert.IsTrue(imageFileNames.Count > 0);
int index = Mathf.RoundToInt(count * (float)normalizedLocalTime);
index = Mathf.Clamp(index, 0, count - 1);
//Load
string imagePath = renderCachePlayableAsset.GetImageFilePath(index);
if (!File.Exists(imagePath))
{
return;
}
ImageLoader.GetImageDataInto(imagePath, StreamingImageSequenceConstants.IMAGE_TYPE_PREVIEW
, out ImageData imageData);
switch (imageData.ReadStatus)
{
case StreamingImageSequenceConstants.READ_STATUS_LOADING:
break;
case StreamingImageSequenceConstants.READ_STATUS_SUCCESS: {
Texture2D tex = PreviewTextureFactory.GetOrCreate(imagePath, ref imageData);
if (null != tex)
{
Graphics.DrawTexture(drawInfo.DrawRect, tex);
}
break;
}
default: {
ImageLoader.RequestLoadPreviewImage(imagePath, (int)drawInfo.DrawRect.width, (int)drawInfo.DrawRect.height);
break;
}
}
}
//----------------------------------------------------------------------------------------------------------------------
/// <inheritdoc/>
public override void DrawBackground(TimelineClip clip, ClipBackgroundRegion region)
{
base.DrawBackground(clip, region);
Rect rect = region.position;
if (rect.width <= SISEditorConstants.MIN_PREVIEW_REGION_WIDTH)
{
return;
}
RenderCachePlayableAsset curAsset = clip.asset as RenderCachePlayableAsset;
if (null == curAsset)
{
return;
}
IList <string> imageFileNames = curAsset.GetImageFileNames();
if (null == imageFileNames || imageFileNames.Count <= 0)
{
return;
}
if (Event.current.type == EventType.Repaint)
{
PreviewClipInfo clipInfo = new PreviewClipInfo()
{
Duration = clip.duration,
TimeScale = clip.timeScale,
ClipIn = clip.clipIn,
FramePerSecond = clip.parentTrack.timelineAsset.editorSettings.fps,
ImageDimensionRatio = curAsset.GetOrUpdateDimensionRatio(),
VisibleLocalStartTime = region.startTime,
VisibleLocalEndTime = region.endTime,
VisibleRect = rect,
};
PreviewUtility.EnumeratePreviewImages(ref clipInfo, (PreviewDrawInfo drawInfo) => {
DrawPreviewImage(ref drawInfo, clip, curAsset);
});
}
}