when createJS sets the size of bitmap images, you can only zoom through setTransform (.. scaleX, scaleY). in comparison, the dWidth, dHeight of canvas native ctx.drawImage (image, dx, dy, dWidth, dHeight) is more convenient for developers, without knowi...
I use the FabricJS library, how to achieve the effect of the above picture? If you achieve this fixed area, no matter how much the filled image is dragged, it will not be allowed to go beyond the circle, similar to the effect of cropping. Wait for ad...
One-line summary [problem brief] how to switch between topics, is there any way? Version & Environment [version and environment] ECharts version [ECharts version]: 4.1.0 Browser version [browser type and version]: Google 67.0.3396.87 (official vers...
the above picture is a scale drawn with canvas, but there is a problem. When the smallest scale exceeds 6000, the display of the browser will be blank, as if you can t draw so many scale points. Is there a solution to this? ...
recently, there is a demand that the on-screen comment cycle shows the winning situation of the user, each piece of data including pictures and text, which boss has done it, urgent request, thank you very much ...
var canvas = document.getElementById( poster ); var windowWidth = $(window).width(); var windowHeight = $(window).height(); console.log(windowWidth, windowHeight) canvas.width = windowWidth * 0.76; canvas.height = canvas.width *...
We want to get the specific width of the text, so we calculate it through the API of measureText , and we get the text width corresponding to the font size of 3px in demo. https: www.w3schools.com tag. but when it comes to our page, the font size ...
the picture synthesizes the text, and when the but picture is generated, the QR code cannot be scanned. Does anyone know how to solve this problem? ...
use canvas to import an image into the interface. The effect you want to achieve is to select a box of an irregular area in the image, and then manipulate the pixels in that area. There is a lot of information on the Internet, but there are no desired re...
the requirement is to implement compressed upload. Most of them are realized by canvas method on the Internet, so I wrote one after it. But it doesn t seem to work. After uploading, the downloaded picture is still very large. the code is as follows ...
recently, when writing a project, canvas; using h5 has no problem opening it in the editor with a browser, but when it is opened in a folder, the dynamic effect of canvas disappears; check the browser s: Image from origin file: has been blocked f...
for example, which canvas library should be used to achieve an "enterprise relationship " effect similar to "Heavenly Eye check "? https: www.tianyancha.com co. ...
I would like to ask how I get the RGBA value of a color in canvas and how it matches the color in the specified color array. I want to match the acquired colors with the colors in the array, and replace the acquired colors with similar colors! is th...
I have been doing the function of uploading avatars on mobile in the past two days. I want to compress and upload images larger than 400kb. Images larger than 400kb have not been successfully compressed and no errors have been reported. Later, I re-read...
recently doing a project, the customer needs a similar Jiang Xiaobai expression bottle of Mini Program, as I do not know much about canvas I am very upset, his production page looks like an ordinary layout, but after the production can be saved to the lo...
I haven t written Canvas h5 for too long. I ve been doing page building recently. I feel that a good project is maintained and a reasonable directory structure is very important. before writing canvas h5, all the method contents of createjs, are wri...
I created a ball model, and then posted a picture on the model, and then slowly let the ball disappear, changing the transparency has no effect! Ask for advice pay the complete code: <!DOCTYPE html> <html> <head> <meta charse...
given x coordinates, want to know the tilt angle of this blue line Real demand: draw words close to the curve and find a train of thought ...
want a smoke effect in H5 ...
need to be able to doodle pictures on the phone, undo, empty, and can be saved as a new picture, download or send with write mindset exploded, ask for components! ...
WeChat Mini Programs who uses node at the back end. Await mysql s asynchronous method with no return value written in getRoom looks like an asynchronous error, but it can be run in the main function. What is the reason for this? if you want to write in...
problem description React dnd develops a drag-and-drop function, how to put the dragged element in a certain location in the target box? the environmental background of the problems and what methods you have tried the content in the drag target bo...
< script > var time; window.onload=function(){ var oHeart=document.querySelector(".heart"); function step(){ oHeart.style.transform="scale(0.7)"; } stepstep(); time= window.setInterval(step,1000); } ...
the blog built by vuepress is not very good at configuring styles yet, and I don t know how to change the color of the code in md. Instead of a simple white word with a black background ...
my project function only needs to add, delete, modify and query the form, and find problems when dealing with adding and editing whether I add or edit, I need to adjust a mode box, and it is the same mode box (because I don t want to write more tha...