Comments (8)
ow, its an easy fix
http://stackoverflow.com/questions/12273858/how-to-make-webgl-canvas-transparent
tried that, works fine now..
from pixijs.
hmm, but the alpha is now out in chrome
from pixijs.
so close! ya could try try removing the premultipliedAlpha from thw webGL creation context?
from pixijs.
I'm also having issues with transparent background with WebGL renderer. Background is transparent only in Opera, new Safari, Chrome and Firefox with WebGL leaves it green.
<html>
<head>
<title>Playground</title>
<style>
body {
margin: 0;
padding: 0;
background-color: #000000;
}
#circle {
display: none;
}
</style>
</head>
<body>
<canvas id="circle" width="300" height="300"></canvas>
<script src="../pixi.js/bin/pixi.js"></script>
<script>
var canvas = document.getElementById('circle');
if (canvas.getContext) {
// Preparing canvas cirlce
var context = canvas.getContext('2d');
context.beginPath();
context.fillStyle = "rgb(255,0,0)";
context.arc(canvas.width/2,canvas.height/2,150,0,Math.PI*2,false);
context.fill();
context.closePath();
// create an new instance of a pixi stage
var stage = new PIXI.Stage(0x66FF99);
var renderer = PIXI.autoDetectRenderer(500, 500, null, true);
document.body.appendChild(renderer.view);
var circleTexture = PIXI.Texture.fromCanvas(document.getElementById("circle"));
var circle = new PIXI.Sprite(circleTexture);
circle.position.x = 100;
circle.position.y = 100;
stage.addChild(circle);
function animate() {
renderer.render(stage);
requestAnimFrame( animate );
}
requestAnimFrame(animate);
} else {
alert("At least HTML5 Canvas support required");
}
</script>
</body>
</html>
from pixijs.
Looks like this is fixed in the dev branch by this commit: a479e27
from pixijs.
Looks like the bug still persists. I'm using the same code above and the latest pixi from master (1.2.0), but background of the stage isn't transparent in Safari and FF. In Chrome and Opera everything is fine.
from pixijs.
I can confirm that this bug still persists when using the WebGLRenderer. If you open http://jsfiddle.net/SamFent/yvh4k/ in FireFox, you will see that the background is opaque and covers the text behind the canvas.
The basic fix for this seems to be fairly simple: when we are requesting a transparent background, it seems we have to use gl.clearColor(0,0,0,0).
Making this simple change fixes the issue in FireFox:
However, this fix alone introduces a weird antialiasing issue in Chrome. In my example above with the nicely-rendered svg spheres with gradients, we suddenly get an ugly grey line around the spheres that seems to have been caused by the clipping of the edges:
The fix for this seems to be to set premultipliedAlpha to true (where it was before the fix above (a479e27) was applied). Setting premultipliedAlpha: true returns the svg images to being rendered without ugly clipping:
I have added a pull request for this fix here: #345
from pixijs.
This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.
from pixijs.
Related Issues (20)
- Bug: Adding fill to certain Graphics with reversed normals causes lineStyle stroke to reverse inner/outer position
- Bug: 'Worker is not defined' with Pixi 7.4.0 and Node v18.17.1 HOT 15
- Bug: Incorrect Text color
- Bug: v8.0.0-rc.7 Calling Texture.update() causes texture rendering to fail HOT 2
- Bug: v8.0.0-rc.7 Exception when rendering odd-sided polygon after even-sided polygon
- Feature Request: Add Multi-Touch events HOT 4
- Bug: v8.0.0-rc.7 Canvas texture conflicts with Graphics when WebGL is used HOT 3
- Bug: v8.0.0-rc.7 iterating into a container and using removeChild causes object to to not be rendered
- Bug: v8.0.0.rc-8 Texture.update() does not update when source is resized HOT 3
- Bug: Empty sprite can break graphics rendering when using WebGPU + Chrome in 8.0.0-rc.9 HOT 2
- Assets.init failing HOT 4
- Bug: Uncaught TypeError: Cannot read properties of null (reading '_x') HOT 6
- Graphics not rendering HOT 4
- Feature Request: Video autoPlay for bundle asset loading HOT 1
- Pixi Text not showing the dynamic font loaded through Assets
- Bug: Unexpected Height during Initialization Pixi App HOT 1
- Bug: incorrect text stroke drawing with some fonts HOT 3
- Feature Request: Change the default priorities of the compressed textures formats HOT 1
- Bug: Asset format is not resolved correctly
- Feature Request: Make deprecation() warnings optional HOT 1
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from pixijs.