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overlays

How to copy /var/lib/docker with overlayfs directory structure with data *as-is* without increasing the storage space

Question I have a docker installation with several images and about 150Gigs of data in /var/lib/docker. This setup uses overlayfs as its storage driver. There are several directories for each layer under /var/lib/docker/overlay holding the actual data. The partition size is 160G. My requirement is to copy the the docker directory from /var/lib/docker to a new disk of 1TB, so that I point docker to start from this new partition and continue to use my old images. Now the problem is, when I use an rsync or a cp command with -a, to copy /var/lib/docker to new partition, instead of a total of 150G

2022-04-27 13:55:06    分类:技术分享    docker   kernel   rsync   coreos   overlays

Overlay behavior when zooming

Question I am having trouble with overlays. I have drawn a polygon overlay on the map, however, when I zoom in or out, the edges no longer align with where I want them to. How can I fix this? Here is what it looks like when I start the app (it covers the whole parking lot perfectly): Correct Here is what it looks like when I zoom out (edges no longer line up with parking lot. The overlay looks a bit bigger than the parking lot): Zoomed out Also, it doesn't align well when I zoom in. In this case the overlay is a bit smaller that the parking lot. (Sorry, stackoverflow won't let me post more

2022-04-06 05:39:25    分类:技术分享    android   google-maps   android-mapview   overlays

how to assign different behavior to parent and child elements when child is hovering on top of parent?

Question Long story short Please see the demo here. I have several div.story-in-myworks inside each div.story-in-myworks, there is a div.pageimage-div-overlay that controls the overlay over each div.story-in-myworks. Inside each div.pageimage-div-overlay there is a a.btn-storysetting responsible for hiding and showing a div.storysettings_talkbubble_left. both a.btn-storysetting and div.storysettings_talkbubble_left are child elements of div.pageimage-div-overlay. Here is a snippet: <div class="img-holder story-in-myworks " rel="91" style="background: url('img/01d-0.jpg?1353745136') no-repeat

2022-01-23 06:53:58    分类:技术分享    javascript   css   event-handling   onclick   overlays

Android MapView overlay disappearing when zooming in

Question I'm working on a simple Android app for plotting routes on a map. All is going well, but I have an issue when zooming in on my Samsung Galaxy S2. It works fine on a Galaxy S3, so I'm wondering whether it's related to memory management on the lower specced device. It also works fine on the emulator. Here is equivalent code located in the overlays onDraw method, just condensed for posting here: Point current = new Point(); Path path = new Path(); Projection projection = mapView.getProjection(); Iterator<GeoPoint> iterator = pointList.iterator(); if (iterator.hasNext()) { projection

2021-12-09 06:10:41    分类:技术分享    android   google-maps   maps   overlays

How to use maven profile and overlays to build and package with specified project from multiple?

Question I have one web project called MyWebProject which having sub modules also and packaging as POM, I have other two simple java project called SimpleJavaProject1 and SimpleJavaProject2 which having packaging as JAR. I am having dependency for both in web peoject. So I have to use Maven Profile and Overlays such way, that when I will build and package my web project with profile JavaProject1 then web project includes SimpleJavaProject1 in its war and when I said JavaProject2 then it should include SimpleJavaProject2. And it should use Overlays only for specified java project. Can I use

2021-10-25 20:37:34    分类:技术分享    java   eclipse   maven   maven-plugin   overlays

DICOM and DICOM overlay question

Question I have a DICOM image that I am reading using C# and converting it into a 16bit bitmap. The bitmap gets created but the image has DICOM overlays. I want to burn the overlay into the bitmap while creating the final dicom bitmap. I am unable to do that. Any help? One way would be to create a bitmap of overlay data and merge the 2 bitmaps but I can not get the overlay data as bitmap also. I have captured the binary overlay data but how do I burn into a bitmap? Thanks Answer1 There are two types of overlays: 1) Burned-In: is the original one. It uses higher bit(s) of monochrome pixeldata

2021-10-21 08:18:19    分类:技术分享    bitmap   jpeg   dicom   overlays

Exception when zooming with overlays on MKMapView: NSInvalidArgumentException NSSetM removeObject: object cannot be nil

Question I am adding around 1000 MKPolygons onto an MKMapView. After adding the overlays onto the MKMapView it works fine. However if I zoom in and zoom out quickly (occasionally letting go of the zoom so the mapView processes it's new visibleMapRect) I find the app (sometimes) crashes with the following exception stack trace: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSSetM removeObject:]: object cannot be nil' *** First throw call stack: ( 0 CoreFoundation 0x0000000107db6b0b __exceptionPreprocess + 171 1 libobjc.A.dylib 0x000000010781b141

2021-10-16 15:24:10    分类:技术分享    ios   objective-c   xcode   mapkit   overlays

OpenCv overlay two Mat (drawings not images) with transparency

Question Hi what I have is a couple of Mat that I want to overlay (in a custom order). The Mat holdes some opencv polygons (which means a lot transparency). This Mat I need to overlay/merge. But not with the classical alpha blending more like with a 100% opacity but with transparency. This is a simple sample code of what I want to merge. Mat m1, m2; m1.create(Point{ 100,100 }, CV_8UC4); m2.create(Point{ 100,100 }, CV_8UC4); cv::polylines(m1, std::vector<Point>{ Point{ 2,20 },Point{ 20,40 } }, true, Scalar(6, 6, 255)); cv::polylines(m2, std::vector<Point>{Point{ 100,100 }, Point{ 0,0 } }, true

2021-10-16 05:09:15    分类:技术分享    c++   opencv   overlays

Changing text appearance in Emacs: overlays work, text properties don't

Question I've been experimenting today with text properties in Emacs. If I position the cursor on a line with some text on it and then execute the following code with M-:, the line is redisplayed in bold. (overlay-put (make-overlay (line-beginning-position) (line-end-position)) 'face 'bold) If, however, I wipe out the overlay with (remove-overlays) and execute the following code, nothing happens (except that the word "nil" appears in the minibuffer). (put-text-property (line-beginning-position) (line-end-position) 'face 'bold) From what I've gleaned so far, I'd expect that these two snippets

2021-08-30 07:47:12    分类:技术分享    emacs   overlays

Ground Overlay with Transparency

Question I have an online map that contains a ground-overlay image, and would like to make the image semi-transparent so that the base map will show through. Is it possible to add a transparency value to this overlay? http://www.tpwd.state.tx.us/fishboat/fish/recreational/lakes/ingulf1c.phtml Here's the code for the ground overlay: var imageBounds = new google.maps.LatLngBounds( new google.maps.LatLng(25.71438633861514, -98.33555959121725), new google.maps.LatLng(30.40813339247205, -93.57953893270167)); function initialize() { var map = new google.maps.Map(document.getElementById("map"), {

2021-08-13 20:43:11    分类:技术分享    google-maps-api-3   transparency   overlays