clip

问题 I have a dc.js chart and I want to export it as a PNG image, using exupero's saveSvgAsPng: function save() { var options = {}; options.backgroundColor = '#ffffff'; options.selectorRemap = function(s) { return s.replace(/\.dc-chart/g, ''); }; var chart = document.getElementById('chart').getElementsByTagName('svg')[0]; saveSvgAsPng(chart, 'chart.png', options) } var data = [ {day: 1, service: 'ABC', count: 100}, {day: 2, service: 'ABC', count: 80}, {day: 4, service: 'ABC', count: 10}, {day: 7,

问题 Has anyone here have done clipping an image within an image? I've seen so far about clipping on the canvas but are all regular shapes(rectangle, circle, etc...). It would be nice if some have actually done it. P.S. with fabric.js or just the regular canvas. 回答1: Sure, you can use compositing to draw a second image only where the first image exists: ctx.drawImage(image1,0,0); // this creates the 'mask' ctx.globalCompositeOperation='source-in'; ctx.drawImage(image2,0,0); // this image only

问题 Guess the title of the post may need editing, but for now I don't know where the problems are. I have read pages and answers to similar questions, here and elsewhere. One Stack Overflow answer is especially close, but I don't understand it. I want a function, to draw polygons on canvas at desired coordinates and to fill them with some background image loaded from a file (large enough that no tiling is needed). Triangles would be fine for a test. Apparently I should use drawImage and clip, and

问题 I have imported a world map dataset from www.GADM.org using the R package raster. I would like to clip it to a polygon I create to reduce the size of the map. I can retrieve the data and I can create the polygon no problem, but when I use the 'gIntersection' command I get an obscure error message. Any suggestions on how to clip my World Map dataset? library(raster) library(rgeos) ## Download Map of the World ## WorldMap <- getData('countries') ## Create the clipping polygon clip.extent <- as

问题 Is it possible to make an NSView not clip its subviews that are outside of the bounds? On iOS I would simply set clipsToBounds of my UIView no NO . But NSView doesn't have such a property. I tried experimenting with wantsLayer , masksToBounds , wantsDefaultClipping , but all of these seem to only change the clipping of the drawRect method, not the subviews. 回答1: After 5 hours of struggling I've just achieve it. Just change class of any NSView in .storyboard or .xib to NoClippingView and it

问题 I've created a program to generate planet sprites. I'm doing that by creating a circular path, running ctx.clip() to keep all the following layers inside of the circle, then drawing a black and transparent texture layer, then a randomly colored rectangle over the full canvas, then a shadow and glow on top of it all. The issue is that a colored line also appears under the circle after clipping, and I'm not sure why. I need this removed. Here is a fiddle. The last line sets the code to loop

问题 I am building a map for the northeastern U.S.A. The map background needs to be either an altitude map or a mean annual temperature map. I have two rasters from Worldclim.org which give me these variables but I need to clip them to the extent of the states I am interested in. Any suggestions on how to do this. This is what I have so far: #load libraries library (sp) library (rgdal) library (raster) library (maps) library (mapproj) #load data state<- data (stateMapEnv) elevation<-raster("alt

问题 I'm using clip to create thumbnails for a gallery. Unfortunately, clip can only be used when an element is absolutely positioned. Applied equally to each img, this of course makes them all sit on each other while using one CSS style, something like this. .Thumbnails { position: absolute; height: 105px; clip: rect(50px 218px 155px 82px); } How can I then position them relative to each other? I just want basic rows. 回答1: I wouldn't recommend a pure css solution. Have you considered a library

问题 The UIElement.Clip property takes a Geometry object and uses it to clip away the outside of the UIElement . I would like to do the geometric inverse and punch a hole into the element instead. Anyone know how to do this? I imagine creating an inverted version of the clip geometry would work, but I can't find a way to do this. EDIT It seems that WPF has Geometry.Combine which can be used to subtract one geometry from another, though this isn't available in Silverlight. If it were, I could

问题 The UIElement.Clip property takes a Geometry object and uses it to clip away the outside of the UIElement . I would like to do the geometric inverse and punch a hole into the element instead. Anyone know how to do this? I imagine creating an inverted version of the clip geometry would work, but I can't find a way to do this. EDIT It seems that WPF has Geometry.Combine which can be used to subtract one geometry from another, though this isn't available in Silverlight. If it were, I could