Recent questions tagged canvas

0 votes

883 views

1 answer

canvas - Placing plot on Tkinter main window in Python

I have a program that processes data then plots the result. Usually in Python plots are shown in a new window, ... be able to scroll the window. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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658 views

1 answer

canvas - How is StaticLayout used in Android?

I need to build my own custom TextView so I have been learning about StaticLayout to draw text on a canvas. This ... do it so I am adding my explanation below. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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661 views

1 answer

canvas - CanvasCaptureMediaStream / MediaRecorder Frame Synchronization

When using CanvasCaptureMediaStream and MediaRecorder, is there a way to get an event on each frame? What I need is ... its frame rate rather than the window's. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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764 views

1 answer

canvas - How to use fabric.js to make a rectangle move according to a given coordinate path?

The coordinates are passed from the back-end server and the rectangle moves according to these coordinates. I am ... -make-a-rectangle-move-according-to-a-given-coordinate-pa...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

781 views

1 answer

canvas - Find new point based on relative angle and distance in javascript

Hi how to find the new point based on relative angle and distance in the graph system. My drawing looks like ... /find-new-point-based-on-relative-angle-and-distance-in-javascript...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

canvas - How to generate an Image from imageData in javascript?

I would like to know if there is any way to create a new Image from imageData, which was previously ... questions/13416800/how-to-generate-an-image-from-imagedata-in-javascript...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

canvas - create Bitmap from byteArray in android

I want to create a bitmap from a bytearray . I tried the following codes Bitmap bmp; bmp = ... /stackoverflow.com/questions/7359173/create-bitmap-from-bytearray-in-android...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

883 views

1 answer

canvas - Custom DataLabels in Chart.js

I'm trying to custom my datalabels using Chartjs, but I only can customize the returning value, and that ... ://stackoverflow.com/questions/66065220/custom-datalabels-in-chart-js...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

894 views

1 answer

canvas - Custom DataLabels in Chart.js

I'm trying to custom my datalabels using Chartjs, but I only can customize the returning value, and that ... ://stackoverflow.com/questions/66065220/custom-datalabels-in-chart-js...

asked Oct 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.1k views

1 answer

canvas 怎么实现为ajax返回的图片添加水印?

axse ( function (data) { var str = data.d; var obj = JSON.parse(str); var banNum = obj.data[0].ImageView; console.log(banNum ... ); $("#imga").attr('src',canvas.toDataURL()); } } )...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

916 views

1 answer

canvas 图片显示问题

<canvas id="canvas" width="1000" height="500" style="background:#333"></canvas> //html代码 var canvas = document.getElementById(' ... (){ cvs.drawImage(Img,100,100); }; }; img();...

asked Feb 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

820 views

1 answer

canvas 跨域问题

在微信上给用户修改头像的时候，用canvas来截图结果报错：Owechat_login.js:226 Uncaught TypeError: Failed to execute 'getImageData' on ' ... 92); document.getElementById('image').style.display = 'initial'; }...

asked Feb 6, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

976 views

1 answer

canvas - Angular + Canvasjs: Octal literals are not allowed in strict mode

I am working on full stack development and using Angular, Node/Express and MySQL. I am trying to add a graph in my ... when targeting ECMAScript 5 and higher. Use the syntax '0o5'....

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

1.3k views

1 answer

canvas - Canvacord is not a constructor

I just installed Canvacord and when starting my discord bot I got an error message in the terminal, here it is: TypeError ... Canvacord (); const {author} = require ("canvacord");...

asked Feb 5, 2021 in Technique[技术] by 深蓝 (71.8m points)

0 votes

914 views

1 answer

canvas 坐标转换问题

遇到一个移动端画板的需求，需要在给定的图片上进行标注，原图需要放大后进行标注，我先用了css transform:scale 放大画布，然后进行标注，这样会造成坐标出问题我目前的获取坐标方法，不进行 ... = e.touches[0]; var x = touch.pageX; var y = touch.pageY; return {x, y} }...