uint32 attribute GL_INVALID_ENUM: glVertexAttribPointer: type was GL_UNSIGNED_INT

[dy]

'use strict'

const regl = require('regl')()

let draw = regl({
	vert: `
		attribute float c;

		void main() {
			gl_Position = vec4(c,0,0,1);
			gl_PointSize = 100.;
		}
	`,

	frag: `
		void main() {
			gl_FragColor = vec4(0,0,0,1);
		}
	`,

	attributes: {
		c: regl.buffer({type:'uint32', data: [0.]})
	},

	primitive: 'points',
	count: 1
})

draw()

gives

Changing type to uint16 works fine.

[grovesNL]

That extension is for elements (the index buffer) in drawElements/drawElementsInstanced, not attributes. So you can't use uint32 as the type there. Even when using the other integer types, they will be converted to floating-point in the shader.

WebGL2 does allow true integer types though.

[dy]

Makes sense. The documentation needs updating then.