node-canvas | Node canvas is a Cairo backed Canvas implementation | Canvas library
kandi X-RAY | node-canvas Summary
kandi X-RAY | node-canvas Summary
Node canvas is a Cairo backed Canvas implementation for NodeJS.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of node-canvas
node-canvas Key Features
node-canvas Examples and Code Snippets
//bitmap is a normal document image
Bitmap newB = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(newB);
canvas.drawColor(Color.argb(sp,255, 0, 0));
import dynamic from 'next/dynamic'
import styled from "styled-components"
const Scene = dynamic(
() => import('./scene'),
{ ssr: false }
)
export default function App() {
return (
)
}
const
window.onload = function () {
const img = document.querySelector("img");
const canvas = document.querySelector("canvas");
const ctx = canvas.getContext("2d");
trackTransforms(ctx);
let zoom = 1;
let mousePos = {
x: 0,
var index = (startx + starty * img.width) * 4;
PImage img; // creates image variable
int size = 7; // element size
void setup() {
size(500, 400); // creates canvas
img = loadImage("Dubbel_augurk-01.jpg");
constructor(props) {
super(props);
this.stageRef = createRef(null);
}
...
...
downloadURI = (uri, name) => {
var link = document.createElement("a");
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener
public partial class SlantedDashedView : ContentView
{
private readonly SKPaint paint = new SKPaint
{
Style = SKPaintStyle.Fill,
Color = Color.Red.ToSKColor()
};
private readonly SKRect rect = new SKRect
// Render first scene into texture
renderer.setRenderTarget( renderTarget );
renderer.clear();
renderer.render( textureScene, textureCamera );
// Render full scene to canvas
renderer.setRenderTarget( null );
renderer.clear();
renderer.ren
stage.setOnShown(e -> {
Screen screen = Screen.getScreensForRectangle(stage.getX(), stage.getY(), stage.getWidth(), stage.getHeight())
.get(0);
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
Grap
let canvas = document.getElementById( 'canvas' );
let ctx = canvasgetContext( '2d' );
let v = canvg.Canvg.fromString( ctx, svg );
let render = v.render();
render.then(function() {
let img = canvas.toDataURL( 'image/png' );
});
Community Discussions
Trending Discussions on node-canvas
QUESTION
I have made a script which renders a graph with multiple lines and dates, I can run the script once perfectly fine but when trying to run it a second time it give an error: "Error: This method is not implemented: Check that a complete date adapter is provided.". I couldn't find anything about it that fits my situation.
...ANSWER
Answered 2022-Mar-23 at 20:48Fixed the issue by moving:
QUESTION
When I run this command in MacBook Pro M1 to install canvas:
...ANSWER
Answered 2022-Mar-04 at 14:44I finally found before install cavas in macOS, we need to install some dependencies using brew like this:
QUESTION
I'm using Node-Canvas to print text on an image and trying to figure out how to ensure strange characters are displayed correctly, even if the main font can't display them.
From what I found online you have to use registerFont
with a font that can display those characters to fall back on, but it seems like it doesn't use it automatically, and I couldn't find anything on how to tell it do use a fallback font.
When registering a font that can display the character (Code2000) it still appears like this (the "ᗩ" character isn't displayed correctly):
(Trying to print HELLO WORLD, I'M ᗩcł!
)
This is my code:
ANSWER
Answered 2022-Feb-28 at 17:19You just need to specify 'Code2000' when you're setting the font. Consecutive fonts separated by commas are used as fallback fonts.
QUESTION
so i was trying to install my npm packages from my project (package.json).
(The package got pulled from my github repo via git pull)
But when i tried to run npm i
i get the error below:
Info:
- Linux Debian 10
- Node v17.5.0
- npm 8.4.1
Full Error:
...ANSWER
Answered 2022-Feb-18 at 14:29As you are using node version 17, I can see that this problem happens,
Downgrading to node version 16 will solve the problem(using nvm):
QUESTION
I use nw.js and when trying to connect the canvas module (node-canvas), this error appears. Installing a different version of node/canvas didn't help. The error appears when
require('canvas')
Error image:
Error
ANSWER
Answered 2022-Jan-30 at 12:59That module requires a native build that is compatible with your global install of Node.js. If the version of Node in NW.js doesn't match your global install, then the built binary will not work with it. Things always work better when you switch your global Node.js install version to match what is built into NW.js. You can use nvm-windows
or nvm
to control your global Node version, just be sure to uninstall Node.js first before using a Node Version Manager so you don't have two conflicting global installs. You can check the Node.js version in NW.js by running console.log(process.version);
.
- https://github.com/nvm-sh/nvm (OSX/Linux)
- https://github.com/coreybutler/nvm-windows (Windows 8+)
- https://github.com/nullivex/nodist (Windows 7)
- https://nwjs.io/versions.json (All NW.js versions data)
If my assumption is correct then:
- Open your app, right-click > inspect > console > process.version > write down the Node version you need > close your app.
- Delete
node_modules
andpackage-lock.json
- Uninstall Node.js globally
- Install the correct Node Version Manager for your OS
- Use the Node Version Manager to install the version your wrote down in step 1
- Do a fresh
npm install
in your project and try running it again
Though I'm very confused as to why you would be using the native canvas
module with NW.js. Why are you packaging an entire browser with your application that has a canvas built in, and then pulling in a second tool and using it instead? Just use the browser's canvas.
QUESTION
I have following Dockerfile
which I run on my MacBook Air M1 (so inside docker I have linux with M1)
ANSWER
Answered 2021-Dec-29 at 18:25Change your dockerfile to (it base on this info) following and install/run metaplex/canvas again
QUESTION
node-canvas (2.7.0) has bug which cannot load image from the path includes multi-bytes characters.
...ANSWER
Answered 2021-Nov-11 at 18:04We should wait official bug fix, but following works as work-around:
QUESTION
In running yarn run build
I am running into the following error:
ANSWER
Answered 2021-Oct-16 at 19:21I think it is case sensitive, ie. change the D
to a d
, change moduleIDs
to moduleIds
.
QUESTION
I am currently working on generating an image with node-canvas
via Firebase Cloud Functions, then sending it as an email attachment with nodemailer
.
The requirement of the image is that I need to input some string onto a template with a specific font.
So on Firebase Cloud Functions, here is what I did:
...ANSWER
Answered 2021-Oct-06 at 21:47You are trying to use the font before it has finished downloading. By the time you realize the problem, open up a terminal and confirm that it's actually present, the download has finished.
What you need to do is wait for either the Promise returned by download(...)
to resolve or attach a callback to the download()
method. Then after it's finished downloading, you can register the font.
QUESTION
I'm getting duplicated calls for a resource when it's added through a script as an image using jsdom and node-canvas.
I believe there's some kind of interaction between jsdom and canvas that performs the call to that endpoint twice, I don't know if someone can help me to configure this properly but I need only one call.
...ANSWER
Answered 2021-Sep-23 at 07:06I asume it has to do with the resizing of the image, "after" it has be loaded. Maybe because of a "redraw", or so. (the browser canvas does this, if I remember correct). I just tested this theory, so if you reorder some lines like this
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