How to share textures between a 2d canvas and webgl canvas?

@lew 

To share textures between a 2D canvas and a WebGL canvas, you can follow these steps:

1. Create a texture in WebGL using the gl.createTexture() method.
2. Bind the texture with the 2D canvas using the TexImage2D method. This will allow you to use the texture in the 2D canvas.
3. Bind the texture with the WebGL canvas using the bindTexture() method. This will allow you to use the texture in the WebGL canvas.

Here is an example code snippet to demonstrate how to share textures between a 2D canvas and a WebGL canvas:

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// Get the 2D canvas context
var ctx = document.getElementById('canvas2d').getContext('2d');

// Create a WebGL context
var gl = document.getElementById('webgl').getContext('webgl');

// Create a texture in WebGL
var texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_2D, texture);

// Bind the texture with the 2D canvas
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, ctx.canvas);

// Bind the texture with the WebGL canvas
gl.bindTexture(gl.TEXTURE_2D, texture);

This code snippet demonstrates how to create a texture in WebGL and bind it with both a 2D and a WebGL canvas, allowing you to share textures between the two.