fabricjs

Fabric js : fabric js drawing mode and selection mode options

由 好久不见. 提交于 2019-12-24 15:08:41
问题 I'm using fabric js to develop a application to draw a line, Rectangle and circle in one canvas.And there is a other function to drag and drop a image on to canvas. But when i added drag and drop function to the application other three function are not working. I have found this article. But i was unable to integrate it with my one. function initCanvas() { $('.canvas-container').each(function (index) { var canvasContainer = $(this)[0]; var canvasObject = $("canvas", this)[0]; var url = $(this

Fabric js text, vertical align to center

由 ▼魔方 西西 提交于 2019-12-24 13:33:39
问题 I am using fabric.js library. I want to vertically align text to ceneter of textbox area. Please see image. In image default cursor is align to top but i want it to center. Is there any property for text as valign like textalign ? Tried originY but no luck. 回答1: fabric.js 3.5.1 works with originY: 'center' see FabricJS: Vertical Align text center .... but the bounding-box has no "minimum height" setting and paddingX / paddingY are not supported by fabric to solve this in fabric, you must

Create valley text (text with curve) in Fabric.js

由 断了今生、忘了曾经 提交于 2019-12-24 13:29:42
问题 I am using Fabric.js to display text on CANVAS.. which works great and displays text like below What I am trying to achieve is Text effect like below below Instead of plain.. is it possible to do so? Here is my code.. <!DOCTYPE html> <head> <meta charset="utf-8"> <title>fabric.js-simple text display</title> <!-- Get version 1.1.0 of Fabric.js from CDN --> <script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/1.1.0/fabric.all.min.js" ></script> <!-- Get the highest 1.X version of

fabric.js: move clipped Image behind fixed clipping-mask

由 霸气de小男生 提交于 2019-12-24 11:29:56
问题 I'm working on a small script that lets a user load a custom image into the canvas on the webpage. So far that works pretty neat. The canvas is initialized using the fabric.js script in order to let the user do some easy editing tasks. The "uploaded" image is clipped by a simple rectangle. Now comes the tricky part: the user should then be able to move around, scale and rotate the image, whilst the rectangle stays in place; selecting the image section preferred. However, even lockMovement =

Modify a canvas using fabric.js without removing existing content

由 瘦欲@ 提交于 2019-12-24 11:19:18
问题 In my web page there is a canvas with some content and this content is rendered separately (without using fabric.js). What I want to do is add some content on top of the existing content, using fabric.js . I tried to do that as follow (sample code), var canvas = new fabric.Canvas('c'); var path = new fabric.Path('M 0 0 L 200 100 L 170 200 z'); path.set({ left: 120, top: 120 }); canvas.add(path); But it will remove the existing content from the canvas. Could you please help me on this? 回答1:

keeping same Object size while zooming with same left origin in fabricJS

由 丶灬走出姿态 提交于 2019-12-24 11:18:05
问题 I've seen this post and tried to do my own function using only the X scaling. fabric.Object.prototype.transform = function (ctx){ var m; if (this.group && !this.group._transformDone) { m = this.calcTransformMatrix(); ctx.transform(m[0], m[1], m[2], m[3], m[4], m[5]); return; } else { m = this.calcOwnMatrix(); //code I've wrote if (this.my && this.my.ignoreZoom != undefined && this.my.ignoreZoom){ var scaleX = 1.0 / this.canvas.viewportTransform[0]; ctx.transform(scaleX, 0, 0, 1, m[4] - 0.5, 0

How to change an Images Cross Origin attribute using loadFromJSON?

由 自作多情 提交于 2019-12-24 10:44:35
问题 I am using FabricJS' loadFromJSON method to load a bunch of objects (text and images) to a canvas. The images are coming from Google Cloud Storage. The bucket they are stored in has the correct CORS settings, for allow all for "Access-Control-Allow-Origin". The images will load in OK, but when trying to save a thumbnail, using the toDataURL() method, I get: Uncaught SecurityError: Failed to execute 'toDataURL' on 'HTMLCanvasElement': Tainted canvases may not be exported. I'm unsure why,

Fabricjs Selection on multiple objects on mouse click

由 99封情书 提交于 2019-12-24 10:20:24
问题 Any suggestion on select multi objects on canvas mouse click? not all object, I want to select objects that overlay on the point. For my knowledge, the target on mouse event is always the top most object only. I had tried to bind event on object, but it wont fired for those at the back side. I had tried select based on item size and height, but it is not working perfectly after rotate. var canvas = this.__canvas = new fabric.Canvas('c', { enableRetinaScaling: false }); function LoopOnObjects

If canvas clicked Drawing on canvas going invisible

由 帅比萌擦擦* 提交于 2019-12-24 09:29:11
问题 Below function i am using to draw line randomly on canvas .i have used fabricjs to draw other Elements also . Problem :: Problem is when After drawing i clicked on canvas , all Elements drawn Goes Invisible . function drawOnCanvas() { // We want to store the state of the canvas, before we apply the change on it. That way we can // revert back to the state before the canvas was changed. saveRestorePoint(); console.log('inside draw on canvas'); var canvasContext = document.getElementById(

Creating complex clipping path for image?

由 让人想犯罪 __ 提交于 2019-12-24 09:19:38
问题 I'm new to fabricjs (and to Javascript development in general). I am "porting" a legacy Flex/Actionscript project and need to enable the user to create a complex clipping path for an image. My approach in Actionscript was to use the Actionscript Graphics class using BlendMode.ERASE to "erase" from the yellow base rectangle (i.e. give the appearance of erasing) and then using that set of rects to create a bitmap to serve as an alpha channel for the final image (Step 3) created on the fly. Can
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