glam/tests/renderer/shader-cache-test.js

Experimental WebGL Engine

import Test from 'tape'
import {
	Mesh,
	Geometry,
	FlatMaterial,
	ForwardRenderer
} from '../../lib'
import ShaderCache   from "../../lib/renderer/shader-cache"

Test("Shader Cache", function(t) {

	t.plan(7)
	var renderer = ForwardRenderer({
		autoAddCanvas : false
	})
	var cache = ShaderCache()
	var meshA = Mesh( Geometry(), FlatMaterial() )
	var meshB = Mesh( Geometry(), FlatMaterial() )

	var shaderA = cache.getOrCreate( renderer.gl, meshA, "" )
	var shaderB = cache.getOrCreate( renderer.gl, meshB, "" )
	
	var shaderA2 = cache.getOrCreate( renderer.gl, meshA, "" )
	var shaderB2 = cache.getOrCreate( renderer.gl, meshB, "" )

	t.equal( shaderA, shaderB, "Caches the shader across meshes")
	t.equal( shaderA, shaderA2, "Caches the shader across time")
	t.equal( shaderB, shaderB2, "Caches the shader across time")

	cache.clearMeshes()

	var shaderA3 = cache.getOrCreate( renderer.gl, meshA, "" )

	t.equal( shaderA, shaderA3, "Cache retains the copy after clearMeshes" )
	t.equal( shaderB, shaderA3, "Cache retains the copy after clearMeshes" )

	cache.clearMeshes()
	cache.clearUnused()

	var shaderA4 = cache.getOrCreate( renderer.gl, meshA, "" )
	
	t.notEqual( shaderA, shaderA4, "Does not retain cache if no meshes used it previously" )
	t.notEqual( shaderB, shaderA4, "Does not retain cache if no meshes used it previously" )

	renderer.destroy()
})