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0);\n","export default function Uniform(glContext, name, type, data) {\n\n    var uniform = (this instanceof Uniform) ? this : {},\n        ctx = glContext;\n\n    function serializeArray(arrayOfArray) {\n        var sa = [];\n        arrayOfArray.forEach(function(a){\n            sa = sa.concat(a);\n        })\n        return sa;\n    }\n\n    function setUniform() {\n        var type = this.type,\n            location = this.location,\n            size = this.size,\n            data = this.data;\n\n        if(Array.isArray(data)) {\n            var hasArray = data.filter(function(d){return Array.isArray(d);});\n            if(hasArray)\n                data = serializeArray(data);\n        }\n\n        if((type == 'float' || type == 'int') && !Array.isArray(data) && !ArrayBuffer.isView(data))\n            data = [data];\n\n        var buf;\n        if (type.slice(0,3) == 'vec' || type == 'float') {\n            buf = new Float32Array(data);\n            ctx['uniform' + size + 'fv'](location, buf);\n        } else if(type.slice(0,4) == 'ivec' || type == 'int'){\n            buf = new Int32Array(data);\n            ctx['uniform' + size + 'iv'](location, buf);\n        } else if(type.slice(0,3) == 'mat') {\n            buf = new Float32Array(data);\n            ctx['uniformMatrix' + size + 'fv'](location, false, buf);\n        } else if(type == 'sampler2D') {\n            if(data.hasOwnProperty('resourceType') && data.resourceType == 'texture') {\n                // console.log('bind ' + data.index);\n                ctx.activeTexture(ctx.TEXTURE0 + data.index);\n                ctx.bindTexture(ctx.TEXTURE_2D, data.ptr);\n                ctx.uniform1i(location, data.index);\n            }\n        }\n    }\n\n    uniform.create = function(name, type, data) {\n\n        if(Array.isArray(data)) {\n            var hasArray = data.filter(function(d){return Array.isArray(d);});\n            if(hasArray)\n                data = serializeArray(data);\n        }\n\n        uniform[name] = {\n            type: type,\n            name: name,\n            data: data,\n            location: null,\n            size: parseInt(type.slice(3,4)) || parseInt(type.slice(4,5)) || 1\n        };\n\n        uniform[name].link = function(program) {\n            if(typeof this.data !== 'undefined' && this.data !== null) {\n                this.location = ctx.getUniformLocation(program, this.name);\n                setUniform.call(this);\n            }\n            return this;\n        };\n\n        uniform[name].load = function(data) {\n            this.data = data;\n            return this;\n        };\n\n        uniform[name].header = function() {\n            var header = 'uniform ' + this.type + ' ' + this.name,\n                len = 0;\n\n            if(this.type != 'sampler2D') {\n                len = this.data.length / this.size;\n            }\n\n            //TODO: fix declaration for matrix\n            if(len > 1 && type != 'mat4') {\n                header += '[' + len + ']';\n            }\n            return header + ';\\n';\n        };\n\n        return uniform[name];\n    }\n\n\n    return uniform;\n}\n","import Uniform from \"./uniform\";\n\nexport default function Texture(glContext) {\n\n    var texture = (this instanceof Texture) ? this : {},\n        ctx = glContext,\n        textureID = 0;\n\n    function setTexture(name, texData) \n    {\n        var type = ctx[texture[name].type.toUpperCase()],\n            format = ctx[texture[name].channel.toUpperCase()],\n            width = texture[name].dim[0],\n            height = texture[name].dim[1];\n\n        texture[name].data = texData;\n\n        ctx.bindTexture(ctx.TEXTURE_2D, texture[name].ptr);\n        ctx.texImage2D(ctx.TEXTURE_2D, 0, format, width, height, 0, format, type, texData);\n        ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_MIN_FILTER, ctx.NEAREST);\n        ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_MAG_FILTER, ctx.NEAREST);\n        ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_WRAP_S, ctx.CLAMP_TO_EDGE);\n        ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_WRAP_T, ctx.CLAMP_TO_EDGE);\n        ctx.bindTexture(ctx.TEXTURE_2D, null);\n    }\n\n    function updateTexture(name, texData, offset, dim) {\n        var type = ctx[texture[name].type.toUpperCase()],\n            format = ctx[texture[name].channel.toUpperCase()],\n            width = dim[0] || texture[name].dim[0],\n            height = dim[1] || texture[name].dim[1];\n\n        ctx.bindTexture(ctx.TEXTURE_2D, texture[name].ptr);\n        ctx.texSubImage2D(ctx.TEXTURE_2D, 0, offset[0], offset[1], width, height, format, type, texData);\n        ctx.bindTexture(ctx.TEXTURE_2D, null);\n    }\n\n    // TODO: Add support for texture compression\n    // function compressTexture(texData) {\n    //\n    //     var ext = (\n    //       ctx.getExtension(\"WEBGL_compressed_texture_s3tc\") ||\n    //       ctx.getExtension(\"MOZ_WEBGL_compressed_texture_s3tc\") ||\n    //       ctx.getExtension(\"WEBKIT_WEBGL_compressed_texture_s3tc\")\n    //     );\n    //\n    //     ctx.compressedTexImage2D(ctx.TEXTURE_2D, 0, ext.COMPRESSED_RGBA_S3TC_DXT3_EXT, texture[name].dim[0], texture[name].dim[1], 0, texData);\n    //     ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_MAG_FILTER, ctx.LINEAR);\n    //     ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_MIN_FILTER, ctx.LINEAR);\n    // }\n\n    texture.create = function(name, type, dim, channel, data, sampler) {\n        var texIndex = (texture.hasOwnProperty(name)) ? texture[name].index : textureID++;\n        texture[name] = {\n            name: name,\n            index: texIndex,\n            type: type || \"float\",\n            dim: dim || [512, 512],\n            channel: channel || \"alpha\",\n            data: null,\n            location: null,\n            sampler: sampler || null,\n            ptr: ctx.createTexture()\n        };\n\n        // if(data !== null && data.length)\n        setTexture(name, data);\n\n        if (texture[name].sampler === null) {\n            texture[name].sampler = Uniform(ctx).create(name, 'sampler2D', texture[name]);\n        } else {\n            texture[name].sampler.data = texture[name];\n        }\n\n        texture[name].link = function(program) {\n            // if (this.data !== null) {\n                // ctx.activeTexture(ctx.TEXTURE0 + this.index);\n                // ctx.bindTexture(ctx.TEXTURE_2D, this.ptr);\n                // this.location = ctx.getUniformLocation(program, this.name);\n                // ctx.uniform1i(this.location, this.index);\n                if (typeof(this.sampler.data) == 'undefined' || this.sampler.data === null)\n                    this.sampler.data = texture[name];\n\n                this.sampler.link(program);\n            // }else{\n            //     console.log('texture data is null!!!')\n            // }\n            return this;\n        }\n\n        texture[name].load = function(texData) {\n            setTexture(this.name, texData);\n            return this;\n        }\n\n        texture[name].copyFromFBO = function() {\n            ctx.bindTexture(ctx.TEXTURE_2D, this.ptr);\n            ctx.copyTexImage2D(\n                ctx.TEXTURE_2D,\n                0,\n                ctx.RGBA,\n                0,\n                0,\n                this.dim[0],\n                this.dim[1],\n                0\n            );\n            ctx.bindTexture(ctx.TEXTURE_2D, null);\n        }\n\n        texture[name].update = function(texData, offset, dim) {\n            updateTexture(this.name, texData, offset, dim);\n            return this;\n        }\n        \n        texture[name].resize = function(dim, data) {\n            this.dim = dim;\n            setTexture(this.name, data);\n        }\n\n        texture[name].delete = function() {\n            glContext.deleteTexture(this.ptr);\n        }\n\n        texture[name].header = function() {\n            if (this.name == this.sampler.name)\n                return 'uniform sampler2D ' + this.sampler.name + ';\\n';\n            else\n                return '';\n        }\n\n        return texture[name];\n    }\n\n    return texture;\n}\n","import Uniform from './uniform';\nimport Attribute from './attribute';\nimport Texture from './texture';\nimport Varying from './varying';\nimport Subroutine from './subroutine';\n\nexport default function Resource(glContext) \n{\n    var resource = (this instanceof Resource) ? this : {},\n        gpuResources = {};\n\n    resource.uniform = new Uniform(glContext);\n    resource.attribute = new Attribute(glContext);\n    resource.texture = new Texture(glContext);\n    resource.varying = new Varying(glContext);\n    resource.subroutine = new Subroutine();\n\n    var resourceTypes = ['uniform', 'attribute', 'texture', 'varying', 'subroutine'];\n\n    resource.allocate = function(type) \n    {\n        if (resourceTypes.indexOf(type) === -1)  { throw Error(\"Error: Invalid resource type: \" + type); }\n        \n        var res = resource[type].create.apply(null, Array.prototype.slice.call(arguments, 1));\n        res.resourceType = type;\n        gpuResources[res.name] = res;\n\n        if (!gpuResources.hasOwnProperty(res.name)) \n        {\n            Object.defineProperty(gpuResources, res.name, {\n                get: function() { return gpuResources[res.name];},\n                set: function(data) { gpuResources[res.name].load(data);}\n            });\n        }\n        return res;\n    };\n\n    resource.link = function(program, resource_names) {\n        var requiredResourceNames = (Array.isArray(resource_names)) ? resource_names : Object.keys(gpuResources);\n        requiredResourceNames.forEach(function(resourceName) {\n            if (gpuResources.hasOwnProperty(resourceName)) {\n                gpuResources[resourceName].link(program);\n            }\n        })\n    };\n\n    resource.get = function(name) {\n        return gpuResources[name];\n    }\n    resource.create = resource.allocate;\n\n    return resource;\n};\n","export default function Attribute(glContext) \n{\n    var attribute = (this instanceof Attribute) ? this : {},\n        ctx = glContext,\n        attributeID = 0;\n\n    function setAttribute(name, data) \n    {\n        if( Array.isArray(data) || ArrayBuffer.isView(data) )\n        {\n            if(!ArrayBuffer.isView(data)) \n            {\n                data = new Float32Array(data);\n            }\n            attribute[name].data = data;\n            ctx.bindBuffer(ctx.ARRAY_BUFFER, attribute[name].ptr);\n            ctx.bufferData(ctx.ARRAY_BUFFER, data, ctx.STATIC_DRAW);\n            // console.log(attribute[name].ptr === attribute[name].old_ptr);\n            // attribute[name].old_ptr = attribute[name].ptr;\n        }\n    }\n\n    attribute.create = function(name, type, data) \n    {\n        attribute[name] = {\n            name: name,\n            type: type || 'float',\n            data: null,\n            location: attributeID++,\n            ptr: ctx.createBuffer(),\n            size: parseInt(type.slice(3,4)) || 1\n        };\n\n        if(data !== null && data.length) \n            {setAttribute(name, data);}\n\n        attribute[name].link = function(program) \n        {\n            ctx.bindBuffer(ctx.ARRAY_BUFFER, this.ptr);\n            this.location = ctx.getAttribLocation(program, this.name);\n            ctx.vertexAttribPointer(this.location, this.size, ctx.FLOAT, false, 0, 0);\n            ctx.enableVertexAttribArray(this.location);\n            return this;\n        }\n\n        attribute[name].load = function(arrayBuffer) \n        {\n            setAttribute(this.name, arrayBuffer);\n            return this;\n        }\n\n        attribute[name].header = function() \n            {return 'attribute ' + this.type + ' ' + this.name + ';\\n';}\n        \n\n        attribute[name].delete = function() {\n            ctx.deleteBuffer(this.ptr);\n        }\n\n        return attribute[name];\n    };\n\n    return attribute;\n}\n","export default function Varying(glContext) {\n\n    var varying = (this instanceof Varying) ? this : {},\n        ctx = glContext;\n\n    varying.create = function(name, type, size) {\n        varying[name] = {\n            name: name,\n            type: type || 'float',\n            size: size || 1,\n        };\n\n        varying[name].link = function() {};\n\n        varying[name].header = function() {\n            var header = 'varying ' + this.type + ' ' + this.name;\n            if(this.size > 1)\n                header += '[' + this.size + ']';\n            return header + ';\\n';\n        }\n\n        return varying[name];\n    }\n\n    return varying;\n}\n","export default function Subroutine() {\n\n    var subroutine = (this instanceof Subroutine) ? this : {};\n\n    subroutine.create = function(name, type, fn) {\n        subroutine[name] = {\n            name: name,\n            type: type || 'float',\n            fn: fn,\n            resourceType: \"subroutine\"\n        };\n\n        subroutine[name].link = function(program) {\n            return this;\n        }\n\n        subroutine[name].load = function(fn) {\n            subroutine[name].fn = fn;\n            return this;\n        }\n\n        subroutine[name].header = function() {\n            return this.fn.toString();\n        }\n\n        return subroutine[name];\n    };\n\n    return subroutine;\n}\n","import Shader from './shader';\n\nexport default function Program(glContext, resources) {\n\n    var program = {},\n        ctx = glContext,\n        kernels = {},\n        shader = new Shader(glContext);\n\n    program.create = function(name, vs, fs) {\n        var name = name || \"default\",\n            vs = vs || \"default\",\n            fs = fs || \"default\",\n            deps = [];\n\n        if (kernels.hasOwnProperty(name)) {\n            this.delete(name);\n        }\n\n        kernels[name] = ctx.createProgram();\n        kernels[name].vs = vs;\n        kernels[name].fs = fs;\n\n        ctx.attachShader(kernels[name], kernels[name].vs);\n        ctx.attachShader(kernels[name], kernels[name].fs);\n        ctx.linkProgram(kernels[name]);\n        var linked = ctx.getProgramParameter(kernels[name], ctx.LINK_STATUS);\n        if (!linked) {\n            var lastError = ctx.getProgramInfoLog(kernels[name]);\n            throw (\"Error in program linking:\" + lastError);\n            ctx.deleteProgram(kernels[name]);\n        }\n\n        deps = deps.concat(kernels[name].vs.deps);\n        deps = deps.concat(kernels[name].fs.deps);\n        kernels[name].deps = deps;\n\n    }\n\n    program.use = function(name, vertex_shader_source, fragment_shader_source) {\n        if (kernels.hasOwnProperty(name)) {\n            ctx.useProgram(kernels[name]);\n            resources.link(kernels[name], kernels[name].deps);\n            return kernels[name];\n        } \n        else {\n            shader.create(name, vertex_shader_source, fragment_shader_source);\n            this.create(name, shader[name].vs, shader[name].fs);\n            ctx.useProgram(kernels[name]);\n            resources.link(kernels[name], kernels[name].deps);\n            return kernels[name];\n        }\n    }\n\n    program.delete = function(name) {\n        if (kernels.hasOwnProperty(name)) {\n            ctx.detachShader(kernels[name], kernels[name].vs);\n            ctx.detachShader(kernels[name], kernels[name].fs);\n            ctx.deleteProgram(kernels[name]);\n            delete kernels[name];\n        }\n    }\n\n    return program;\n}\n","export default function Shader(glContext) {\n    \n    var shader = (this instanceof Shader) ? this : {},\n        ctx = glContext;\n        // resource = glResource,\n        // parameters = ctx._dict || {};\n\n    shader.create = function(name, vertex_shader_source, fragment_shader_source){\n        shader[name] = {\n            name: name,\n            vertex_shader_source: vertex_shader_source, \n            fragment_shader_source: fragment_shader_source, \n            vs: createShader(ctx, ctx.VERTEX_SHADER, vertex_shader_source),\n            fs: createShader(ctx, ctx.FRAGMENT_SHADER, fragment_shader_source)\n        }\n\n        // shader[name].vs = createShader(ctx, ctx.VERTEX_SHADER, vertex_shader_source);\n        // shader[name].fs = createShader(ctx, ctx.FRAGMENT_SHADER, fragment_shader_source);\n        // console.log(shader[name].vs);\n        // console.log(shader[name].fs);\n\n        shader[name].vs.deps = [];\n        addDeps(vertex_shader_source, shader[name].vs.deps);\n        shader[name].fs.deps = [];\n        addDeps(fragment_shader_source, shader[name].vs.deps);\n\n        function createShader(gl, type, source) {\n            var shader = gl.createShader(type);\n            gl.shaderSource(shader, source);\n            gl.compileShader(shader);\n            var success = gl.getShaderParameter(shader, gl.COMPILE_STATUS);\n            if (success) {\n                return shader;\n            }\n            // console.log('NO!');\n            console.log(gl.getShaderInfoLog(shader));\n            gl.deleteShader(shader);\n        }\n\n        function addDeps(source, deps){\n            var re = /\\s*(attribute|uniform)\\s+\\w+\\s+(\\w+)/;        \n            source.split('\\n').forEach(function(v){\n                var result = re.exec(v);\n                if(result){\n                    deps.push(result[2]);\n                }\n            });\n        }\n    }\n\n    return shader;\n}\n","import Resource from './resource';\nimport Program from './program';\nimport Framebuffer from './framebuffer';\n// import Reactive from './reactive';\n\nexport default function FlexGL(arg) {\n\n    var flexgl = (this instanceof FlexGL) ? this : {};\n\n\n    var options = arg || {},\n        container = options.container || null,\n        canvas = options.canvas || document.createElement(\"canvas\"),\n        width = options.width || null,\n        height = options.height || null,\n        padding = options.padding || {\n            left: 0,\n            right: 0,\n            top: 0,\n            bottom: 0\n        },\n        ctx = options.context || options.ctx || null,\n        kernels = {},\n        sharedFunction = options.sharedFunction || {};\n\n\n\n    if (typeof(canvas) == \"string\") {\n        if (canvas[0] == \"#\") canvas = document.getElementById(cavnas.substring(1));\n        else canvas = document.getElementById(cavnas);\n    }\n    if (container) {\n        container = (typeof(container) == \"string\") ? document.getElementById(container) : container;\n        if (width === null) width = container.clientWidth;\n        if (height === null) height = container.clientHeight;\n    }\n    // width -= padding.left + padding.right;\n    // height -= padding.top + padding.bottom;\n    canvas.width = width;\n    canvas.height = height;\n    canvas.style.position = \"absolute\";\n    canvas.style.marginLeft = padding.left + \"px\";\n    canvas.style.marginTop = padding.top + \"px\";\n\n\n    if (ctx === null)\n        ctx = setupWebGL(canvas);\n    flexgl.ctx = ctx;\n    flexgl.canvas = canvas;\n    flexgl.resources = resources;\n    ctx._dict = options.env || options.dict || options.dictionary || {};\n\n    var resources = new Resource(ctx),\n        framebuffers = new Framebuffer(ctx),\n        program = new Program(ctx, resources),\n        realProgram = null;\n\n\n    var blendExt = ctx.getExtension(\"EXT_blend_minmax\");\n    if (blendExt) {\n        ctx.MAX_EXT = blendExt.MAX_EXT;\n        ctx.MIN_EXT = blendExt.MIN_EXT;\n    }\n    ctx.ext = ctx.getExtension(\"ANGLE_instanced_arrays\");\n    enableExtension([\n        \"OES_texture_float\",\n        \"OES_texture_float_linear\",\n        // \"OES_texture_half_float\",\n        // \"OES_texture_half_float_linear\"\n    ]);\n    if (container)\n        container.appendChild(canvas);\n\n\n    function setupWebGL(canvas) {\n        var names = [\"webgl\", \"experimental-webgl\"];\n        var gl = null;\n        for (var i = 0; i < names.length; ++i) {\n            try {\n                gl = canvas.getContext(names[i]);\n            } catch (e) {}\n            if (gl) break;\n        }\n        return gl;\n    }\n\n    function enableExtension(extensions) {\n        if (!Array.isArray(extensions)) extensions = [extensions];\n        extensions.forEach(function(extension) {\n            var extProps = ctx.getExtension(extension);\n            if (extProps !== null) {\n                Object.keys(extProps).forEach(function(ep) {\n                    if (!ext.hasOwnProperty(ep)) {\n                        ctx.ext[ep] = extProps[ep];\n                    }\n                })\n            }\n        });\n    };\n    flexgl.enableExtension = enableExtension;\n\n    /**\n     * Allocate Attributes in vertex buffer array stored in GPU memory\n     * @param  {String} name attribute name\n     * @param  {String} type attribute type: float, vec2, ...\n     * @param  {Array} data data values\n     * @return {Object}      FLexGL object\n     */\n    flexgl.attribute = function(name, type, data) {\n        resources.allocate(\"attribute\", name, type, data);\n        if (!flexgl.attribute.hasOwnProperty(name)) {\n            Object.defineProperty(flexgl.attribute, name, { //after allocating, flexgl gets new key attribute, helping easily change attribute data.\n                get(){\n                    return resources.attribute[name];\n                },\n                set(data){\n                    resources.attribute[name].load(data);\n                }\n            });\n        }\n        return flexgl;\n    };\n    // flexgl.buffer = flexgl.attribute; //alias\n\n    /**\n     * Create a Uniform variable for WebGL shader programs\n     * @param  {String} name attribute name\n     * @param  {String} type uniform variable type: float, vec2, ...\n     * @param  {Array} data data values\n     * @return {Object}      FLexGL object\n     */\n    flexgl.uniform = function(name, type, data) {\n        resources.allocate(\"uniform\", name, type, data);\n        if (!flexgl.uniform.hasOwnProperty(name)) {\n            Object.defineProperty(flexgl.uniform, name, {\n                get: function() {\n                    return resources.uniform[name];\n                },\n                set: function(data) {\n                    resources.uniform[name].load(data);\n                    if (ctx.isProgram(realProgram))                    ///////////////////\n                        resources.uniform[name].link(realProgram);        /////////////////\n                }\n            });\n        }\n        return flexgl;\n    };\n\n    flexgl.uniform.serialize = function(aoa) {\n        var sa = [];\n        aoa.forEach(function(a) {\n            sa = sa.concat(a);\n        })\n        return sa;\n    }\n\n    /**\n     * Create a Uniform variable for WebGL shader programs\n     * @param  {String} name attribute name\n     * @param  {String} type texture type: unsigned_byte or float, ...\n     * @param  {Array} data data values\n     * @param  {Array} dim [width, height]\n     * @param  {String} [channel='alpha'] WebGL formats (rgba, alpha)\n     * @param  {Object} [sampler=null] FLexGL Uniform Object\n     * @return {Object}      FLexGL object\n     */\n    flexgl.texture = function(name, type, data, dim, channel, sampler) {\n        resources.allocate(\"texture\", name, type, dim, channel, data, sampler);\n        Object.defineProperty(flexgl.texture, name, {\n            get: function() {\n                return resources.texture[name];\n            },\n            set: function(data) {\n                resources.texture[name].load(data);\n            }\n        });\n        return flexgl;\n    }\n\n    flexgl.texture.update = function(name, data, offset, dim) {\n        resources.texture[name].update(data, offset, dim);\n    }\n\n    /**\n     * Create a Uniform variable for WebGL shader programs\n     * @param  {String} name attribute name\n     * @param  {String} [type] Varying variable type: float, vec2, ...\n     * @param  {Number} [size=1] data array\n     * @return {Object}      FLexGL object\n     */\n    flexgl.varying = function(name, type, size) {\n        resources.allocate(\"varying\", name, type, size);\n        return flexgl;\n    };\n\n    /**\n     * Create a Uniform variable for WebGL shader programs\n     * @param  {String} name attribute name\n     * @param  {String} type attribute type: float, vec2, ...\n     * @param  {Array} dim [width, height]\n     * @param  {Object} [texture=null] FLexGL Texture Object\n     * @return {Object}      FLexGL object\n     */\n    flexgl.framebuffer = function(name, type, dim, texture) {\n        var texture = texture || resources.allocate('texture', name, type, dim, 'rgba', null);\n        framebuffers.create(name, type, dim, texture);\n\n        if (!flexgl.framebuffer.hasOwnProperty(name)) {\n            Object.defineProperty(flexgl.framebuffer, name, {\n                get: function() {\n                    return framebuffers[name];\n                }\n            });\n        }\n        return flexgl;\n    }\n\n    flexgl.framebuffer.enableRead = function(name, program) {\n        framebuffers[name].enableRead(program);\n    }\n\n    flexgl.bindFramebuffer = function(fbName) {\n        if (fbName === null)\n            ctx.bindFramebuffer(ctx.FRAMEBUFFER, null);\n        else\n            ctx.bindFramebuffer(ctx.FRAMEBUFFER, framebuffers[fbName].ptr);\n    }\n\n    flexgl.subroutine = function(name, type, fn) {\n        resources.allocate(\"subroutine\", name, type, fn);\n        return flexgl;\n    }\n\n    flexgl.parameter = function(keyValuePairs) {\n        Object.keys(keyValuePairs).forEach(function(key) {\n            ctx._dict[key] = keyValuePairs[key];\n            if (Array.isArray(ctx._dict[key])) {\n                var i = 0;\n                Object.defineProperty(ctx._dict, key, {\n                    get: function() {\n                        return keyValuePairs[key][i++];\n                    },\n                    set: function(newArray) {\n                        i = 0;\n                        ctx._dict[key] = newArray;\n                    }\n                });\n            } else if(typeof(ctx._dict[key]) == 'object') {\n                var dictKeys = Object.keys(ctx._dict[key]);\n                fxgl.uniform('dict'+key, 'float', dictKeys.map(d=>ctx._dict[key][d]));\n            }\n        })\n        return flexgl;\n    }\n\n    flexgl.dictionary = flexgl.parameter;\n    flexgl.shader = program.shader;\n\n\n    flexgl.app = function(name, options) {\n        return function(args){\n            realProgram = program.use(name, options.vertex_shader_source, options.fragment_shader_source);\n            return options.render.call(flexgl, args);\n        }\n    }\n\n    flexgl.dimension = function() {\n        return [canvas.width, canvas.height];\n    }\n\n    return flexgl;\n}\n\n\n\n        // if(num === 0){\n        //     ctx.viewport(0, 0, 1024, 1);\n        //     realProgram = program.use(name, options.vertex_shader_source, options.fragment_shader_source);\n        //     this.bindFramebuffer('f_sum_texture');\n\n        //     // this.attribute['a_position'].link(realProgram);\n        //     // this.attribute['a_texcoord'].link(realProgram);\n        //     // this.texture['u_texture'].link(realProgram);\n        // }\n\n        // else if(num === 1){\n        //     ctx.viewport(0, 0, ctx.canvas.width, ctx.canvas.height);\n        //     realProgram = program.use(name, options.vertex_shader_source, options.fragment_shader_source);\n            \n        //     this.bindFramebuffer(null);\n        //     // this.attribute['a_position'].link(realProgram);\n        //     // this.attribute['a_texcoord'].link(realProgram);\n        //     // this.framebuffer.enableRead('f_sum_texture', realProgram);\n        // }\n\n        // else if(num === 2){\n        //     this.bindFramebuffer(null);\n\n        //     ctx.viewport(0, 0, 1024, 1);\n        //     this.bindFramebuffer('f_mem_texture_1');\n        //     realProgram = program.use(name, options.vertex_shader_source, options.fragment_shader_source);\n\n        //     // this.attribute['a_position'].link(realProgram);\n        //     // this.attribute['a_texcoord'].link(realProgram);\n        //     // this.framebuffer.enableRead('f_mem_texture_0', realProgram);\n        //     // this.framebuffer.enableRead('f_sum_texture', realProgram);\n        // }\n\n        // else if(num === 3){\n        //     this.bindFramebuffer(null);\n\n        //     ctx.viewport(0, 0, 1024, 1);\n        //     this.bindFramebuffer('f_mem_texture_0');\n        //     realProgram = program.use(name, options.vertex_shader_source, options.fragment_shader_source);\n\n        //     // this.attribute['a_position'].link(realProgram);\n        //     // this.attribute['a_texcoord'].link(realProgram);\n        //     // this.framebuffer.enableRead('f_mem_texture_1', realProgram);\n        //     // this.framebuffer.enableRead('f_sum_texture', realProgram);\n        // }\n\n        // else if(num === 4){\n        //     this.bindFramebuffer(null); \n        //     ctx.viewport(0, 0, ctx.canvas.width, ctx.canvas.height);\n        //     realProgram = program.use(name, options.vertex_shader_source, options.fragment_shader_source);\n\n        //     // this.attribute['a_position'].link(realProgram);\n        //     // this.attribute['a_texcoord'].link(realProgram);\n        //     // this.framebuffer.enableRead('f_mem_texture_1', realProgram);\n        // }\n\n        // else if(num === 5){\n        //     this.bindFramebuffer(null);\n        //     ctx.viewport(0, 0, ctx.canvas.width, ctx.canvas.height);\n        //     realProgram = program.use(name, options.vertex_shader_source, options.fragment_shader_source);\n\n        //     // this.attribute['a_position'].link(realProgram);\n        //     // this.attribute['a_texcoord'].link(realProgram);\n        //     // this.framebuffer.enableRead('f_mem_texture_0', realProgram);\n        // }\n\n        // this.uniform['u_texture'].link(realProgram);    \n        // var draw = options.render || options.draw;\n\n        // return function(args) {\n        //     // var gl = flexgl.program(name);\n        //     return draw.call(ctx, args);\n        // }\n\n        // ctx.drawArrays(ctx.LINES, 0, 2);","import Texture from './texture';\n\nexport default function Framebuffer(glContext) {\n\n    var framebuffer = (this instanceof Framebuffer) ? this : {},\n        ctx = glContext;\n\n    framebuffer.create = function(name, type, dim, texture) {\n\n        framebuffer[name] = {\n            ptr: ctx.createFramebuffer(),\n            name: name,\n            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      ctx.bindRenderbuffer(gl.RENDERBUFFER, null);\n            ctx.bindFramebuffer(gl.FRAMEBUFFER, null);\n            ctx.deleteRenderbuffer(this.renderbuffer);\n            ctx.deleteTexture(this.texture.ptr)\n            ctx.deleteFramebuffer(this.ptr);\n        };\n\n        return framebuffer[name];\n    }\n\n    return framebuffer;\n}\n","import FlexGL from './flexgl';\n\n(function makeGlobal() {\n  if (typeof window !== 'undefined') {\n    window.FlexGL = FlexGL;\n  }\n})();\n"],"sourceRoot":""}
\ No newline at end of file
diff --git a/dist/flexgl.min.js b/dist/flexgl.min.js
new file mode 100644
index 0000000..281e95f
--- /dev/null
+++ b/dist/flexgl.min.js
@@ -0,0 +1,2 @@
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0);\n","export default function Uniform(glContext, name, type, data) {\n\n    var uniform = (this instanceof Uniform) ? this : {},\n        ctx = glContext;\n\n    function serializeArray(arrayOfArray) {\n        var sa = [];\n        arrayOfArray.forEach(function(a){\n            sa = sa.concat(a);\n        })\n        return sa;\n    }\n\n    function setUniform() {\n        var type = this.type,\n            location = this.location,\n            size = this.size,\n            data = this.data;\n\n        if(Array.isArray(data)) {\n            var hasArray = data.filter(function(d){return Array.isArray(d);});\n            if(hasArray)\n                data = serializeArray(data);\n        }\n\n        if((type == 'float' || type == 'int') && !Array.isArray(data) && !ArrayBuffer.isView(data))\n            data = [data];\n\n        var buf;\n        if (type.slice(0,3) == 'vec' || type == 'float') {\n            buf = new Float32Array(data);\n            ctx['uniform' + size + 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     uniform[name] = {\n            type: type,\n            name: name,\n            data: data,\n            location: null,\n            size: parseInt(type.slice(3,4)) || parseInt(type.slice(4,5)) || 1\n        };\n\n        uniform[name].link = function(program) {\n            if(typeof this.data !== 'undefined' && this.data !== null) {\n                this.location = ctx.getUniformLocation(program, this.name);\n                setUniform.call(this);\n            }\n            return this;\n        };\n\n        uniform[name].load = function(data) {\n            this.data = data;\n            return this;\n        };\n\n        uniform[name].header = function() {\n            var header = 'uniform ' + this.type + ' ' + this.name,\n                len = 0;\n\n            if(this.type != 'sampler2D') {\n                len = this.data.length / this.size;\n            }\n\n            //TODO: fix declaration for matrix\n            if(len > 1 && type != 'mat4') {\n                header += '[' + len + ']';\n            }\n            return header + ';\\n';\n        };\n\n        return uniform[name];\n    }\n\n\n    return uniform;\n}\n","import Uniform from './uniform';\nimport Attribute from './attribute';\nimport Texture from './texture';\nimport Varying from './varying';\nimport Subroutine from './subroutine';\n\nexport default function Resource(glContext) \n{\n    var resource = (this instanceof Resource) ? this : {},\n        gpuResources = {};\n\n    resource.uniform = new Uniform(glContext);\n    resource.attribute = new Attribute(glContext);\n    resource.texture = new Texture(glContext);\n    resource.varying = new Varying(glContext);\n    resource.subroutine = new Subroutine();\n\n    var resourceTypes = ['uniform', 'attribute', 'texture', 'varying', 'subroutine'];\n\n    resource.allocate = function(type) \n    {\n        if (resourceTypes.indexOf(type) === -1)  { throw Error(\"Error: Invalid resource type: \" + type); }\n        \n        var res = resource[type].create.apply(null, Array.prototype.slice.call(arguments, 1));\n        res.resourceType = type;\n        gpuResources[res.name] = res;\n\n        if (!gpuResources.hasOwnProperty(res.name)) \n        {\n            Object.defineProperty(gpuResources, res.name, {\n                get: function() { return gpuResources[res.name];},\n                set: function(data) { gpuResources[res.name].load(data);}\n            });\n        }\n        return res;\n    };\n\n    resource.link = function(program, resource_names) {\n        var requiredResourceNames = (Array.isArray(resource_names)) ? resource_names : Object.keys(gpuResources);\n        requiredResourceNames.forEach(function(resourceName) {\n            if (gpuResources.hasOwnProperty(resourceName)) {\n                gpuResources[resourceName].link(program);\n            }\n        })\n    };\n\n    resource.get = function(name) {\n        return gpuResources[name];\n    }\n    resource.create = resource.allocate;\n\n    return resource;\n};\n","export default function Attribute(glContext) \n{\n    var attribute = (this instanceof Attribute) ? this : {},\n        ctx = glContext,\n        attributeID = 0;\n\n    function setAttribute(name, data) \n    {\n        if( Array.isArray(data) || ArrayBuffer.isView(data) )\n        {\n            if(!ArrayBuffer.isView(data)) \n            {\n                data = new Float32Array(data);\n            }\n            attribute[name].data = data;\n            ctx.bindBuffer(ctx.ARRAY_BUFFER, attribute[name].ptr);\n            ctx.bufferData(ctx.ARRAY_BUFFER, data, ctx.STATIC_DRAW);\n            // console.log(attribute[name].ptr === attribute[name].old_ptr);\n            // attribute[name].old_ptr = attribute[name].ptr;\n        }\n    }\n\n    attribute.create = function(name, type, data) \n    {\n        attribute[name] = {\n            name: name,\n            type: type || 'float',\n            data: null,\n            location: attributeID++,\n            ptr: ctx.createBuffer(),\n            size: parseInt(type.slice(3,4)) || 1\n        };\n\n        if(data !== null && data.length) \n            {setAttribute(name, data);}\n\n        attribute[name].link = function(program) \n        {\n            ctx.bindBuffer(ctx.ARRAY_BUFFER, this.ptr);\n            this.location = ctx.getAttribLocation(program, this.name);\n            ctx.vertexAttribPointer(this.location, this.size, ctx.FLOAT, false, 0, 0);\n            ctx.enableVertexAttribArray(this.location);\n            return this;\n        }\n\n        attribute[name].load = function(arrayBuffer) \n        {\n            setAttribute(this.name, arrayBuffer);\n            return this;\n        }\n\n        attribute[name].header = function() \n            {return 'attribute ' + this.type + ' ' + this.name + ';\\n';}\n        \n\n        attribute[name].delete = function() {\n            ctx.deleteBuffer(this.ptr);\n        }\n\n        return attribute[name];\n    };\n\n    return attribute;\n}\n","import Uniform from \"./uniform\";\n\nexport default function Texture(glContext) {\n\n    var texture = (this instanceof Texture) ? this : {},\n        ctx = glContext,\n        textureID = 0;\n\n    function setTexture(name, texData) \n    {\n        var type = ctx[texture[name].type.toUpperCase()],\n            format = ctx[texture[name].channel.toUpperCase()],\n            width = texture[name].dim[0],\n            height = texture[name].dim[1];\n\n        texture[name].data = texData;\n\n        ctx.bindTexture(ctx.TEXTURE_2D, texture[name].ptr);\n        ctx.texImage2D(ctx.TEXTURE_2D, 0, format, width, height, 0, format, type, texData);\n        ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_MIN_FILTER, ctx.NEAREST);\n        ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_MAG_FILTER, ctx.NEAREST);\n        ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_WRAP_S, ctx.CLAMP_TO_EDGE);\n        ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_WRAP_T, ctx.CLAMP_TO_EDGE);\n        ctx.bindTexture(ctx.TEXTURE_2D, null);\n    }\n\n    function updateTexture(name, texData, offset, dim) {\n        var type = ctx[texture[name].type.toUpperCase()],\n            format = ctx[texture[name].channel.toUpperCase()],\n            width = dim[0] || texture[name].dim[0],\n            height = dim[1] || texture[name].dim[1];\n\n        ctx.bindTexture(ctx.TEXTURE_2D, texture[name].ptr);\n        ctx.texSubImage2D(ctx.TEXTURE_2D, 0, offset[0], offset[1], width, height, format, type, texData);\n        ctx.bindTexture(ctx.TEXTURE_2D, null);\n    }\n\n    // TODO: Add support for texture compression\n    // function compressTexture(texData) {\n    //\n    //     var ext = (\n    //       ctx.getExtension(\"WEBGL_compressed_texture_s3tc\") ||\n    //       ctx.getExtension(\"MOZ_WEBGL_compressed_texture_s3tc\") ||\n    //       ctx.getExtension(\"WEBKIT_WEBGL_compressed_texture_s3tc\")\n    //     );\n    //\n    //     ctx.compressedTexImage2D(ctx.TEXTURE_2D, 0, ext.COMPRESSED_RGBA_S3TC_DXT3_EXT, texture[name].dim[0], texture[name].dim[1], 0, texData);\n    //     ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_MAG_FILTER, ctx.LINEAR);\n    //     ctx.texParameteri(ctx.TEXTURE_2D, ctx.TEXTURE_MIN_FILTER, ctx.LINEAR);\n    // }\n\n    texture.create = function(name, type, dim, channel, data, sampler) {\n        var texIndex = (texture.hasOwnProperty(name)) ? texture[name].index : textureID++;\n        texture[name] = {\n            name: name,\n            index: texIndex,\n            type: type || \"float\",\n            dim: dim || [512, 512],\n            channel: channel || \"alpha\",\n            data: null,\n            location: null,\n            sampler: sampler || null,\n            ptr: ctx.createTexture()\n        };\n\n        // if(data !== null && data.length)\n        setTexture(name, data);\n\n        if (texture[name].sampler === null) {\n            texture[name].sampler = Uniform(ctx).create(name, 'sampler2D', texture[name]);\n        } else {\n            texture[name].sampler.data = texture[name];\n        }\n\n        texture[name].link = function(program) {\n            // if (this.data !== null) {\n                // ctx.activeTexture(ctx.TEXTURE0 + this.index);\n                // ctx.bindTexture(ctx.TEXTURE_2D, this.ptr);\n                // this.location = ctx.getUniformLocation(program, this.name);\n                // ctx.uniform1i(this.location, this.index);\n                if (typeof(this.sampler.data) == 'undefined' || this.sampler.data === null)\n                    this.sampler.data = texture[name];\n\n                this.sampler.link(program);\n            // }else{\n            //     console.log('texture data is null!!!')\n            // }\n            return this;\n        }\n\n        texture[name].load = function(texData) {\n            setTexture(this.name, texData);\n            return this;\n        }\n\n        texture[name].copyFromFBO = function() {\n            ctx.bindTexture(ctx.TEXTURE_2D, this.ptr);\n            ctx.copyTexImage2D(\n                ctx.TEXTURE_2D,\n                0,\n                ctx.RGBA,\n                0,\n                0,\n                this.dim[0],\n                this.dim[1],\n                0\n            );\n            ctx.bindTexture(ctx.TEXTURE_2D, null);\n        }\n\n        texture[name].update = function(texData, offset, dim) {\n            updateTexture(this.name, texData, offset, dim);\n            return this;\n        }\n        \n        texture[name].resize = function(dim, data) {\n            this.dim = dim;\n            setTexture(this.name, data);\n        }\n\n        texture[name].delete = function() {\n            glContext.deleteTexture(this.ptr);\n        }\n\n        texture[name].header = function() {\n            if (this.name == this.sampler.name)\n                return 'uniform sampler2D ' + this.sampler.name + ';\\n';\n            else\n                return '';\n        }\n\n        return texture[name];\n    }\n\n    return texture;\n}\n","export default function Varying(glContext) {\n\n    var varying = (this instanceof Varying) ? this : {},\n        ctx = glContext;\n\n    varying.create = function(name, type, size) {\n        varying[name] = {\n            name: name,\n            type: type || 'float',\n            size: size || 1,\n        };\n\n        varying[name].link = function() {};\n\n        varying[name].header = function() {\n            var header = 'varying ' + this.type + ' ' + this.name;\n            if(this.size > 1)\n                header += '[' + this.size + ']';\n            return header + ';\\n';\n        }\n\n        return varying[name];\n    }\n\n    return varying;\n}\n","export default function Subroutine() {\n\n    var subroutine = (this instanceof Subroutine) ? this : {};\n\n    subroutine.create = function(name, type, fn) {\n        subroutine[name] = {\n            name: name,\n            type: type || 'float',\n            fn: fn,\n            resourceType: \"subroutine\"\n        };\n\n        subroutine[name].link = function(program) {\n            return this;\n        }\n\n        subroutine[name].load = function(fn) {\n            subroutine[name].fn = fn;\n            return this;\n        }\n\n        subroutine[name].header = function() {\n            return this.fn.toString();\n        }\n\n        return subroutine[name];\n    };\n\n    return subroutine;\n}\n","import Resource from './resource';\nimport Program from './program';\nimport Framebuffer from './framebuffer';\n// import Reactive from './reactive';\n\nexport default function FlexGL(arg) {\n\n    var flexgl = (this instanceof FlexGL) ? this : {};\n\n\n    var options = arg || {},\n        container = options.container || null,\n        canvas = options.canvas || document.createElement(\"canvas\"),\n        width = options.width || null,\n        height = options.height || null,\n        padding = options.padding || {\n            left: 0,\n            right: 0,\n            top: 0,\n            bottom: 0\n        },\n        ctx = options.context || options.ctx || null,\n        kernels = {},\n        sharedFunction = options.sharedFunction || {};\n\n\n\n    if (typeof(canvas) == \"string\") {\n        if (canvas[0] == \"#\") canvas = document.getElementById(cavnas.substring(1));\n        else canvas = document.getElementById(cavnas);\n    }\n    if (container) {\n        container = (typeof(container) == \"string\") ? document.getElementById(container) : container;\n        if (width === null) width = container.clientWidth;\n        if (height === null) height = container.clientHeight;\n    }\n    // width -= padding.left + padding.right;\n    // height -= padding.top + padding.bottom;\n    canvas.width = width;\n    canvas.height = height;\n    canvas.style.position = \"absolute\";\n    canvas.style.marginLeft = padding.left + \"px\";\n    canvas.style.marginTop = padding.top + \"px\";\n\n\n    if (ctx === null)\n        ctx = setupWebGL(canvas);\n    flexgl.ctx = ctx;\n    flexgl.canvas = canvas;\n    flexgl.resources = resources;\n    ctx._dict = options.env || options.dict || options.dictionary || {};\n\n    var resources = new Resource(ctx),\n        framebuffers = new Framebuffer(ctx),\n        program = new Program(ctx, resources),\n        realProgram = null;\n\n\n    var blendExt = ctx.getExtension(\"EXT_blend_minmax\");\n    if (blendExt) {\n        ctx.MAX_EXT = blendExt.MAX_EXT;\n        ctx.MIN_EXT = blendExt.MIN_EXT;\n    }\n    ctx.ext = ctx.getExtension(\"ANGLE_instanced_arrays\");\n    enableExtension([\n        \"OES_texture_float\",\n        \"OES_texture_float_linear\",\n        // \"OES_texture_half_float\",\n        // \"OES_texture_half_float_linear\"\n    ]);\n    if (container)\n        container.appendChild(canvas);\n\n\n    function setupWebGL(canvas) {\n        var names = [\"webgl\", \"experimental-webgl\"];\n        var gl = null;\n        for (var i = 0; i < names.length; ++i) {\n            try {\n                gl = canvas.getContext(names[i]);\n            } catch (e) {}\n            if (gl) break;\n        }\n        return gl;\n    }\n\n    function enableExtension(extensions) {\n        if (!Array.isArray(extensions)) extensions = [extensions];\n        extensions.forEach(function(extension) {\n            var extProps = ctx.getExtension(extension);\n            if (extProps !== null) {\n                Object.keys(extProps).forEach(function(ep) {\n                    if (!ext.hasOwnProperty(ep)) {\n                        ctx.ext[ep] = extProps[ep];\n                    }\n                })\n            }\n        });\n    };\n    flexgl.enableExtension = enableExtension;\n\n    /**\n     * Allocate Attributes in vertex buffer array stored in GPU memory\n     * @param  {String} name attribute name\n     * @param  {String} type attribute type: float, vec2, ...\n     * @param  {Array} data data values\n     * @return {Object}      FLexGL object\n     */\n    flexgl.attribute = function(name, type, data) {\n        resources.allocate(\"attribute\", name, type, data);\n        if (!flexgl.attribute.hasOwnProperty(name)) {\n            Object.defineProperty(flexgl.attribute, name, { //after allocating, flexgl gets new key attribute, helping easily change attribute data.\n                get(){\n                    return resources.attribute[name];\n                },\n                set(data){\n                    resources.attribute[name].load(data);\n                }\n            });\n        }\n        return flexgl;\n    };\n    // flexgl.buffer = flexgl.attribute; //alias\n\n    /**\n     * Create a Uniform variable for WebGL shader programs\n     * @param  {String} name attribute name\n     * @param  {String} type uniform variable type: float, vec2, ...\n     * @param  {Array} data data values\n     * @return {Object}      FLexGL object\n     */\n    flexgl.uniform = function(name, type, data) {\n        resources.allocate(\"uniform\", name, type, data);\n        if (!flexgl.uniform.hasOwnProperty(name)) {\n            Object.defineProperty(flexgl.uniform, name, {\n                get: function() {\n                    return resources.uniform[name];\n                },\n                set: function(data) {\n                    resources.uniform[name].load(data);\n                    if (ctx.isProgram(realProgram))                    ///////////////////\n                        resources.uniform[name].link(realProgram);        /////////////////\n                }\n            });\n        }\n        return flexgl;\n    };\n\n    flexgl.uniform.serialize = function(aoa) {\n        var sa = [];\n        aoa.forEach(function(a) {\n            sa = sa.concat(a);\n        })\n        return sa;\n    }\n\n    /**\n     * Create a Uniform variable for WebGL shader programs\n     * @param  {String} name attribute name\n     * @param  {String} type texture type: unsigned_byte or float, ...\n     * @param  {Array} data data values\n     * @param  {Array} dim [width, height]\n     * @param  {String} [channel='alpha'] WebGL formats (rgba, alpha)\n     * @param  {Object} [sampler=null] FLexGL Uniform Object\n     * @return {Object}      FLexGL object\n     */\n    flexgl.texture = function(name, type, data, dim, channel, sampler) {\n        resources.allocate(\"texture\", name, type, dim, channel, data, sampler);\n        Object.defineProperty(flexgl.texture, name, {\n            get: function() {\n                return resources.texture[name];\n            },\n            set: function(data) {\n                resources.texture[name].load(data);\n            }\n        });\n        return flexgl;\n    }\n\n    flexgl.texture.update = function(name, data, offset, dim) {\n        resources.texture[name].update(data, offset, dim);\n    }\n\n    /**\n     * Create a Uniform variable for WebGL shader programs\n     * @param  {String} name attribute name\n     * @param  {String} [type] Varying variable type: float, vec2, ...\n     * @param  {Number} [size=1] data array\n     * @return {Object}      FLexGL object\n     */\n    flexgl.varying = function(name, type, size) {\n        resources.allocate(\"varying\", name, type, size);\n        return flexgl;\n    };\n\n    /**\n     * Create a Uniform variable for WebGL shader programs\n     * @param  {String} name attribute name\n     * @param  {String} type attribute type: float, vec2, ...\n     * @param  {Array} dim [width, height]\n     * @param  {Object} [texture=null] FLexGL Texture Object\n     * @return {Object}      FLexGL object\n     */\n    flexgl.framebuffer = function(name, type, dim, texture) {\n        var texture = texture || resources.allocate('texture', name, type, dim, 'rgba', null);\n        framebuffers.create(name, type, dim, texture);\n\n        if (!flexgl.framebuffer.hasOwnProperty(name)) {\n            Object.defineProperty(flexgl.framebuffer, name, {\n                get: function() {\n                    return framebuffers[name];\n                }\n            });\n        }\n        return flexgl;\n    }\n\n    flexgl.framebuffer.enableRead = function(name, program) {\n        framebuffers[name].enableRead(program);\n    }\n\n    flexgl.bindFramebuffer = function(fbName) {\n        if (fbName === null)\n            ctx.bindFramebuffer(ctx.FRAMEBUFFER, null);\n        else\n            ctx.bindFramebuffer(ctx.FRAMEBUFFER, framebuffers[fbName].ptr);\n    }\n\n    flexgl.subroutine = function(name, type, fn) {\n        resources.allocate(\"subroutine\", name, type, fn);\n        return flexgl;\n    }\n\n    flexgl.parameter = function(keyValuePairs) {\n        Object.keys(keyValuePairs).forEach(function(key) {\n            ctx._dict[key] = keyValuePairs[key];\n            if (Array.isArray(ctx._dict[key])) {\n                var i = 0;\n                Object.defineProperty(ctx._dict, key, {\n                    get: function() {\n                        return keyValuePairs[key][i++];\n                    },\n                    set: function(newArray) {\n                        i = 0;\n                        ctx._dict[key] = newArray;\n                    }\n                });\n            } else if(typeof(ctx._dict[key]) == 'object') {\n                var dictKeys = Object.keys(ctx._dict[key]);\n                fxgl.uniform('dict'+key, 'float', dictKeys.map(d=>ctx._dict[key][d]));\n            }\n        })\n        return flexgl;\n    }\n\n    flexgl.dictionary = flexgl.parameter;\n    flexgl.shader = program.shader;\n\n\n    flexgl.app = function(name, options) {\n        return function(args){\n            realProgram = program.use(name, options.vertex_shader_source, options.fragment_shader_source);\n            return options.render.call(flexgl, args);\n        }\n    }\n\n    flexgl.dimension = function() {\n        return [canvas.width, canvas.height];\n    }\n\n    return flexgl;\n}\n\n\n\n        // if(num === 0){\n        //     ctx.viewport(0, 0, 1024, 1);\n        //     realProgram = program.use(name, options.vertex_shader_source, options.fragment_shader_source);\n        //     this.bindFramebuffer('f_sum_texture');\n\n        //     // this.attribute['a_position'].link(realProgram);\n        //     // this.attribute['a_texcoord'].link(realProgram);\n        //     // this.texture['u_texture'].link(realProgram);\n        // }\n\n        // else if(num === 1){\n        //     ctx.viewport(0, 0, ctx.canvas.width, ctx.canvas.height);\n        //     realProgram = program.use(name, options.vertex_shader_source, options.fragment_shader_source);\n            \n        //     this.bindFramebuffer(null);\n        //     // this.attribute['a_position'].link(realProgram);\n        //     // this.attribute['a_texcoord'].link(realProgram);\n        //     // this.framebuffer.enableRead('f_sum_texture', realProgram);\n        // }\n\n        // else if(num === 2){\n        //     this.bindFramebuffer(null);\n\n        //     ctx.viewport(0, 0, 1024, 1);\n        //     this.bindFramebuffer('f_mem_texture_1');\n        //     realProgram = program.use(name, options.vertex_shader_source, options.fragment_shader_source);\n\n        //     // this.attribute['a_position'].link(realProgram);\n        //     // this.attribute['a_texcoord'].link(realProgram);\n        //     // this.framebuffer.enableRead('f_mem_texture_0', realProgram);\n        //     // this.framebuffer.enableRead('f_sum_texture', realProgram);\n        // }\n\n        // else if(num === 3){\n        //     this.bindFramebuffer(null);\n\n        //     ctx.viewport(0, 0, 1024, 1);\n        //     this.bindFramebuffer('f_mem_texture_0');\n        //     realProgram = program.use(name, options.vertex_shader_source, options.fragment_shader_source);\n\n        //     // this.attribute['a_position'].link(realProgram);\n        //     // this.attribute['a_texcoord'].link(realProgram);\n        //     // this.framebuffer.enableRead('f_mem_texture_1', realProgram);\n        //     // this.framebuffer.enableRead('f_sum_texture', realProgram);\n        // }\n\n        // else if(num === 4){\n        //     this.bindFramebuffer(null); \n        //     ctx.viewport(0, 0, ctx.canvas.width, ctx.canvas.height);\n        //     realProgram = program.use(name, options.vertex_shader_source, options.fragment_shader_source);\n\n        //     // this.attribute['a_position'].link(realProgram);\n        //     // this.attribute['a_texcoord'].link(realProgram);\n        //     // this.framebuffer.enableRead('f_mem_texture_1', realProgram);\n        // }\n\n        // else if(num === 5){\n        //     this.bindFramebuffer(null);\n        //     ctx.viewport(0, 0, ctx.canvas.width, ctx.canvas.height);\n        //     realProgram = program.use(name, options.vertex_shader_source, options.fragment_shader_source);\n\n        //     // this.attribute['a_position'].link(realProgram);\n        //     // this.attribute['a_texcoord'].link(realProgram);\n        //     // this.framebuffer.enableRead('f_mem_texture_0', realProgram);\n        // }\n\n        // this.uniform['u_texture'].link(realProgram);    \n        // var draw = options.render || options.draw;\n\n        // return function(args) {\n        //     // var gl = flexgl.program(name);\n        //     return draw.call(ctx, args);\n        // }\n\n        // ctx.drawArrays(ctx.LINES, 0, 2);","import FlexGL from './flexgl';\n\n(function makeGlobal() {\n  if (typeof window !== 'undefined') {\n    window.FlexGL = FlexGL;\n  }\n})();\n","import Texture from './texture';\n\nexport default function Framebuffer(glContext) {\n\n    var framebuffer = (this instanceof Framebuffer) ? this : {},\n        ctx = glContext;\n\n    framebuffer.create = function(name, type, dim, texture) {\n\n        framebuffer[name] = {\n            ptr: ctx.createFramebuffer(),\n            name: name,\n            type: type || \"float\",\n            width: dim[0] || 1024,\n            height: dim[1] || 1024,\n            texture: texture || null,\n            // renderbuffer: ctx.createRenderbuffer(),\n        }\n\n        // if (framebuffer[name].texture === null) {\n        //     var buf = (type == 'float') ?\n        //         new Float32Array(dim[0] * dim[1] * 4) :\n        //         new Uint8Array(dim[0] * dim[1] * 4);\n        //     framebuffer[name].texture = Texture(ctx).create(name, type, dim, \"rgba\", buf);\n        // }\n\n        // var renderbuffer = framebuffer[name].renderbuffer;\n        ctx.bindFramebuffer(ctx.FRAMEBUFFER, framebuffer[name].ptr);\n        // ctx.bindRenderbuffer(ctx.RENDERBUFFER, renderbuffer);\n        // ctx.renderbufferStorage(\n        //     ctx.RENDERBUFFER,\n        //     ctx.DEPTH_COMPONENT16,\n        //     framebuffer[name].width,\n        //     framebuffer[name].height\n        // );\n        ctx.framebufferTexture2D(\n            ctx.FRAMEBUFFER,\n            ctx.COLOR_ATTACHMENT0,\n            ctx.TEXTURE_2D,\n            framebuffer[name].texture.ptr,\n            0\n        );\n        // ctx.framebufferRenderbuffer(\n        //     ctx.FRAMEBUFFER,\n        //     ctx.DEPTH_ATTACHMENT,\n        //     ctx.RENDERBUFFER,\n        //     renderbuffer\n        // );\n        // ctx.bindRenderbuffer(ctx.RENDERBUFFER, null);\n        ctx.bindFramebuffer(ctx.FRAMEBUFFER, null);\n\n        framebuffer[name].enableRead = function(program) {\n            ctx.activeTexture(ctx.TEXTURE0 + this.texture.index);\n            ctx.bindTexture(ctx.TEXTURE_2D, this.texture.ptr);\n            this.texture.location = ctx.getUniformLocation(program, this.texture.name);\n            ctx.uniform1i(this.texture.location, this.texture.index);\n        };\n\n        // framebuffer[name].enableRead = function(program) {\n        //     this.texture.link(program);\n        // };\n\n        framebuffer[name].delete = function() {\n            ctx.bindRenderbuffer(gl.RENDERBUFFER, null);\n            ctx.bindFramebuffer(gl.FRAMEBUFFER, null);\n            ctx.deleteRenderbuffer(this.renderbuffer);\n            ctx.deleteTexture(this.texture.ptr)\n            ctx.deleteFramebuffer(this.ptr);\n        };\n\n        return framebuffer[name];\n    }\n\n    return framebuffer;\n}\n","import Shader from './shader';\n\nexport default function Program(glContext, resources) {\n\n    var program = {},\n        ctx = glContext,\n        kernels = {},\n        shader = new Shader(glContext);\n\n    program.create = function(name, vs, fs) {\n        var name = name || \"default\",\n            vs = vs || \"default\",\n            fs = fs || \"default\",\n            deps = [];\n\n        if (kernels.hasOwnProperty(name)) {\n            this.delete(name);\n        }\n\n        kernels[name] = ctx.createProgram();\n        kernels[name].vs = vs;\n        kernels[name].fs = fs;\n\n        ctx.attachShader(kernels[name], kernels[name].vs);\n        ctx.attachShader(kernels[name], kernels[name].fs);\n        ctx.linkProgram(kernels[name]);\n        var linked = ctx.getProgramParameter(kernels[name], ctx.LINK_STATUS);\n        if (!linked) {\n            var lastError = ctx.getProgramInfoLog(kernels[name]);\n            throw (\"Error in program linking:\" + lastError);\n            ctx.deleteProgram(kernels[name]);\n        }\n\n        deps = deps.concat(kernels[name].vs.deps);\n        deps = deps.concat(kernels[name].fs.deps);\n        kernels[name].deps = deps;\n\n    }\n\n    program.use = function(name, vertex_shader_source, fragment_shader_source) {\n        if (kernels.hasOwnProperty(name)) {\n            ctx.useProgram(kernels[name]);\n            resources.link(kernels[name], kernels[name].deps);\n            return kernels[name];\n        } \n        else {\n            shader.create(name, vertex_shader_source, fragment_shader_source);\n            this.create(name, shader[name].vs, shader[name].fs);\n            ctx.useProgram(kernels[name]);\n            resources.link(kernels[name], kernels[name].deps);\n            return kernels[name];\n        }\n    }\n\n    program.delete = function(name) {\n        if (kernels.hasOwnProperty(name)) {\n            ctx.detachShader(kernels[name], kernels[name].vs);\n            ctx.detachShader(kernels[name], kernels[name].fs);\n            ctx.deleteProgram(kernels[name]);\n            delete kernels[name];\n        }\n    }\n\n    return program;\n}\n","export default function Shader(glContext) {\n    \n    var shader = (this instanceof Shader) ? this : {},\n        ctx = glContext;\n        // resource = glResource,\n        // parameters = ctx._dict || {};\n\n    shader.create = function(name, vertex_shader_source, fragment_shader_source){\n        shader[name] = {\n            name: name,\n            vertex_shader_source: vertex_shader_source, \n            fragment_shader_source: fragment_shader_source, \n            vs: createShader(ctx, ctx.VERTEX_SHADER, vertex_shader_source),\n            fs: createShader(ctx, ctx.FRAGMENT_SHADER, fragment_shader_source)\n        }\n\n        // shader[name].vs = createShader(ctx, ctx.VERTEX_SHADER, vertex_shader_source);\n        // shader[name].fs = createShader(ctx, ctx.FRAGMENT_SHADER, fragment_shader_source);\n        // console.log(shader[name].vs);\n        // console.log(shader[name].fs);\n\n        shader[name].vs.deps = [];\n        addDeps(vertex_shader_source, shader[name].vs.deps);\n        shader[name].fs.deps = [];\n        addDeps(fragment_shader_source, shader[name].vs.deps);\n\n        function createShader(gl, type, source) {\n            var shader = gl.createShader(type);\n            gl.shaderSource(shader, source);\n            gl.compileShader(shader);\n            var success = gl.getShaderParameter(shader, gl.COMPILE_STATUS);\n            if (success) {\n                return shader;\n            }\n            // console.log('NO!');\n            console.log(gl.getShaderInfoLog(shader));\n            gl.deleteShader(shader);\n        }\n\n        function addDeps(source, deps){\n            var re = /\\s*(attribute|uniform)\\s+\\w+\\s+(\\w+)/;        \n            source.split('\\n').forEach(function(v){\n                var result = re.exec(v);\n                if(result){\n                    deps.push(result[2]);\n                }\n            });\n        }\n    }\n\n    return shader;\n}\n"],"sourceRoot":""}
\ No newline at end of file
diff --git a/example/example.html b/example/example.html
index 881c506..bf1d233 100644
--- a/example/example.html
+++ b/example/example.html
@@ -1,6 +1,16 @@
 <html>
 <body>
-    <script src="../dist/flexgl.0.2.0.js"></script>
+    <a href="#" class="update">Refresh</a>
+    
+	<script src="http://cdnjs.cloudflare.com/ajax/libs/rxjs/2.2.26/rx.js"></script>
+	<script src="http://cdnjs.cloudflare.com/ajax/libs/rxjs/2.2.26/rx.async.js"></script>
+	<script src="http://cdnjs.cloudflare.com/ajax/libs/rxjs/2.2.26/rx.coincidence.js"></script>
+	<script src="http://cdnjs.cloudflare.com/ajax/libs/rxjs/2.2.26/rx.binding.js"></script>
+	<script src="http://cdnjs.cloudflare.com/ajax/libs/rxjs/2.2.26/rx.time.js"></script>
+	<script src="http://cdnjs.cloudflare.com/ajax/libs/rxjs-dom/2.0.7/rx.dom.js"></script>
+    <script src="../dist/flexgl.js"></script>
+    <!-- <script src="../src/reactive.js"></script> -->
     <script src="./simpledraw.js"></script>
 </body>
 </html>
+
diff --git a/example/simpledraw.js b/example/simpledraw.js
index 0b34573..74b6151 100644
--- a/example/simpledraw.js
+++ b/example/simpledraw.js
@@ -1,33 +1,307 @@
 var fxgl = new FlexGL({
     container: document.body,
-    width: 800,
-    height: 600
 });
 
-//Allocate and manage resources
-fxgl.attribute('aVertexPos', 'vec2', [-1, 0, 1, 1, 0, -1.0])
-    .uniform('uColor', 'vec4', [0.5, 0.0, 0.5, 1.0]);
+var zeroArray = new Float32Array(1024*4);
+for(var i = 0; i < zeroArray.length; i++){
+    zeroArray[i] = 0.0;
+}
+fxgl.attribute('a_position', 'vec2', [-1.0, -1.0, 1.0, 1.0])
+    .attribute('a_texcoord', 'float', [0.0, 1.0])
+    .framebuffer('f_sum_texture', 'float', [1024, 1])
+    .texture('f_mem_texture_0', 'float', zeroArray, [1024, 1], 'rgba')
+    .texture('f_mem_texture_1', 'float', zeroArray, [1024, 1], 'rgba')
+    .framebuffer('f_mem_texture_0', 'float', [1024, 1], fxgl.texture['f_mem_texture_0'])
+    .framebuffer('f_mem_texture_1', 'float', [1024, 1], fxgl.texture['f_mem_texture_1']);
 
-//Create Program
-var simpleDraw = fxgl.app('drawTriangle', {
-    vs: function() {
-        gl_Position = vec4(this.aVertexPos, 0, 1.0);
-    },
-    fs: function() {
-        gl_FragColor = this.uColor;
-    },
-    render: function(len) {
-        this.drawArrays(this.TRIANGLES, 0, len);
+var sumData = fxgl.app('sumData', {
+    vertex_shader_source: `
+        attribute vec2 a_position;
+        attribute float a_texcoord; 
+        varying float v_texcoord;
+
+        void main(){ 
+            gl_Position = vec4(a_position, 0, 1.0);
+            v_texcoord = a_texcoord;
+        }
+    `,
+    fragment_shader_source: `
+        precision highp float; 
+        uniform sampler2D u_texture;
+        varying float v_texcoord;
+
+        void main(){ 
+            float sum = 0.0;
+            for(float i = 0.0; i < 1024.0; i++){
+                sum += texture2D(u_texture, vec2(v_texcoord, (i+0.5)/1024.0)).a;
+            }
+            sum /= 1024.0;
+            gl_FragColor = vec4(sum, 0.0, 0.0, 1.0);
+
+        }
+    `,
+    render: function(args){
+        this.ctx.viewport(0, 0, 1024, 1);
+        this.bindFramebuffer('f_sum_texture');
+        this.ctx.drawArrays(this.ctx.LINES, 0, 2);
+    }
+});
+
+var swingDataA = fxgl.app('swingDataA', {
+    vertex_shader_source: `
+        attribute vec2 a_position;
+        attribute float a_texcoord; 
+        varying float v_texcoord;
+
+        void main(){ 
+            gl_Position = vec4(a_position, 0, 1.0);
+            v_texcoord = a_texcoord;
+        }
+    `,
+    fragment_shader_source: `
+        precision highp float; 
+        uniform sampler2D f_sum_texture;
+        uniform sampler2D f_mem_texture_0;
+        varying float v_texcoord;
+
+        void main(){
+            float v0 = texture2D(f_sum_texture, vec2(v_texcoord, 0.5)).x;
+            float v1 = texture2D(f_mem_texture_0, vec2(v_texcoord, 0.5)).x;
+            gl_FragColor = vec4(v0+v1, 0.0, 0.0, 1.0);
+        }
+    `,
+    render: function(args){
+        this.ctx.viewport(0, 0, 1024, 1);
+        this.bindFramebuffer('f_mem_texture_1');
+        this.ctx.drawArrays(this.ctx.LINES, 0, 2);
+    }
+});    
+
+var drawDataA = fxgl.app('drawDataA', {
+    vertex_shader_source: `
+        attribute vec2 a_position;
+        attribute float a_texcoord; 
+        varying float v_texcoord;
+
+        void main(){ 
+            gl_Position = vec4(a_position, 0, 1.0);
+            v_texcoord = a_texcoord;
+        }
+    `,
+    fragment_shader_source: `
+        precision highp float; 
+        uniform sampler2D f_mem_texture_1;
+        varying float v_texcoord;
+
+        void main(){
+            gl_FragColor = texture2D(f_mem_texture_1, vec2(v_texcoord, 0.5));
+        }
+    `,
+    render: function(args){
+        this.ctx.viewport(0, 0, this.ctx.canvas.width, this.ctx.canvas.height);
+        this.bindFramebuffer(null);
+        this.ctx.drawArrays(this.ctx.LINES, 0, 2);  
+    }
+});
+
+var swingDataB = fxgl.app('swingDataB', {
+    vertex_shader_source: `
+        attribute vec2 a_position;
+        attribute float a_texcoord; 
+        varying float v_texcoord;
+
+        void main(){ 
+            gl_Position = vec4(a_position, 0, 1.0);
+            v_texcoord = a_texcoord;
+        }
+    `,
+    fragment_shader_source: `
+        precision highp float; 
+        uniform sampler2D f_sum_texture;
+        uniform sampler2D f_mem_texture_1;
+        varying float v_texcoord;
+
+        void main(){
+            float v0 = texture2D(f_sum_texture, vec2(v_texcoord, 0.5)).x;
+            float v1 = texture2D(f_mem_texture_1, vec2(v_texcoord, 0.5)).x;
+            gl_FragColor = vec4(v0+v1, 0.0, 0.0, 1.0);
+        }
+    `,
+    render: function(args){
+        this.ctx.viewport(0, 0, 1024, 1);
+        this.bindFramebuffer('f_mem_texture_0');
+        this.ctx.drawArrays(this.ctx.LINES, 0, 2);
+    }
+});   
+
+var drawDataB = fxgl.app('drawDataB', {
+    vertex_shader_source: `
+        attribute vec2 a_position;
+        attribute float a_texcoord; 
+        varying float v_texcoord;
+
+        void main(){ 
+            gl_Position = vec4(a_position, 0, 1.0);
+            v_texcoord = a_texcoord;
+        }
+    `,
+    fragment_shader_source: `
+        precision highp float; 
+        uniform sampler2D f_mem_texture_0;
+        varying float v_texcoord;
+
+        void main(){
+            gl_FragColor = texture2D(f_mem_texture_0, vec2(v_texcoord, 0.5));
+        }
+    `,
+    render: function(args){
+        this.ctx.viewport(0, 0, this.ctx.canvas.width, this.ctx.canvas.height);
+        this.bindFramebuffer(null);
+        this.ctx.drawArrays(this.ctx.LINES, 0, 2);
+    }
+});
+
+var total_data = [];
+for(var j = 0; j < 100; j++){
+    var typedArray = new Float32Array(1024*1024);
+    for (var i = 0; i < typedArray.length; i++){
+        typedArray[i] = Math.random()/100;
+    }  
+    total_data.push(typedArray);  
+}
+
+
+var pointer = -1;
+
+var updateButton = document.querySelector('.update');
+var updateClickStream = Rx.Observable.fromEvent(updateButton, 'click');
+
+var requestStream = updateClickStream.startWith('startup click')
+    .map(function(){
+        pointer++;
+        if(pointer > 99){
+            alert('Out of Stack!');
+            pointer--;
+        }
+        return pointer;
+    });
+
+var responseStream = requestStream
+    .map(function(p){
+        return total_data[pointer];
+    });
+
+
+
+var i = 0;
+responseStream.subscribe(function(data_chunk){
+    if(pointer === 0){
+        fxgl.texture('u_texture', 'float', data_chunk, [1024, 1024]);
+    }
+    else{
+        fxgl.texture['u_texture'] = data_chunk;
+    }
+
+    sumData();
+    if(i%2 === 0){
+        swingDataA();
+        drawDataA();
     }
+    else{
+        swingDataB();
+        drawDataB();
+    }
+    i++;
 });
 
-simpleDraw(3); // draw triangle
 
-//change vertices and color
-fxgl.attribute.aVertexPos = [
-    -0.5, -0.5, 0.5, -0.5, -0.5, 0.5,
-    -0.5,  0.5, 0.5, -0.5, 0.5, 0.5
-];
-fxgl.uniform.uColor = [0.0, 0.5, 0.5, 1.0]
+// fxgl.attribute('aVertexPos', 'vec2', [-1, 0, 1, 1, 0, -1.0])
+//     .uniform('uColor', 'vec4', [0.1, 1.0, 0.75, 1.0]);
+
+// //Create Program
+// var simpleDraw = fxgl.app('drawTriangle', {
+//     vs: function() {
+//         gl_Position = vec4(this.aVertexPos, 0, 1.0);
+//     },
+//     fs: function() {
+//         gl_FragColor = this.uColor;
+//     },
+//     render: function(len) {
+//         this.drawArrays(this.TRIANGLES, 0, len);
+//     }
+// });
+
+// simpleDraw(3); // draw triangle
+
+// //change vertices and color
+// fxgl.attribute.aVertexPos = [
+//     -0.5, -0.5, 0.5, -0.5, -0.5, 0.5,
+//     -0.5,  0.5, 0.5, -0.5, 0.5, 0.5
+// ];
+// fxgl.uniform.uColor = [1.0, 1.0, 0.5, 1.0]
+
+// simpleDraw(6); // draw rectangle
+
+
+
+//Create Program
+
+            //gl_FragColor = vec4(0.0, texture2D(u_texture, vec2(v_texcoord, (88.0+0.5)/1024.0)).a, 0.0, 1.0);
+            // gl_FragColor = vec4(sum, 0.0, 0.0, 1.0);
+
+
+
+
+// fxgl.app('drawLine1', {
+//     vsource: `
+//         attribute vec2 a_position;
+
+//         void main(){ 
+//             gl_Position = vec4(a_position, 0, 1.0);
+//         }
+//     `,
+//     fsource: `
+//         precision highp float; 
+
+//         void main(){
+//             gl_FragColor = vec4(0.5, 0.5, 0.0, 1.0);
+//         }
+//     `,
+// });
+
+// simpleDraw(); // draw triangle
+//            gl_FragColor = vec4(texture2D(u_texture, vec2(217, 217))[3], texture2D(u_texture, vec2(117, 117))[3], texture2D(u_texture, vec2(0, 0))[3], 1.0); 
+    //uniform float u_color; \
+ // gl_FragColor = vec4(u_color, u_color, u_color, 1.0); \
+ //            gl_FragColor = vec4(texture2D(u_texture, vec2(0.5, 0.5))[0], texture2D(u_texture, vec2(0.2, 0.2))[0], texture2D(u_texture, vec2(0.3, 0.3))[0], 1.0); 
+
+
+
+    // fxgl.app('drawLine1', {
+    //     vsource: `
+    //         attribute vec2 a_position;
+    //         attribute float a_texcoord; 
+    //         varying float v_texcoord;
+
+    //         void main(){ 
+    //             gl_Position = vec4(a_position, 0, 1.0);
+    //             v_texcoord = a_texcoord;
+    //         }
+    //     `,
+    //     fsource: `
+    //         precision highp float; 
+    //         uniform sampler2D f_sum_texture;
+    //         varying float v_texcoord;
+
+    //         void main(){
+    //             gl_FragColor = texture2D(f_sum_texture, vec2(v_texcoord, 0.5));
+    //         }
+    //     `,
+    // }, 1);
+
+
+
+
+
+
 
-simpleDraw(6); // draw rectangle
diff --git a/image.png b/image.png
new file mode 100644
index 0000000..6774ae1
Binary files /dev/null and b/image.png differ
diff --git a/package.json b/package.json
index 504108e..e8b48ff 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,12 @@
   },
   "homepage": "https://github.com/jpkli/flexgl#readme",
   "devDependencies": {
-    "uglifyjs-webpack-plugin": "^1.1.8",
-    "webpack": "^3.10.0"
+    "uglifyjs-webpack-plugin": "^1.1.6",
+    "webpack-cli": "^3.1.0",
+    "webpack-command": "^0.4.1"
+  },
+  "dependencies": {
+    "npm": "^6.3.0",
+    "rxjs": "^6.2.2"
   }
 }
diff --git a/play_framebuffer_1/main.css b/play_framebuffer_1/main.css
new file mode 100644
index 0000000..a7f28b9
--- /dev/null
+++ b/play_framebuffer_1/main.css
@@ -0,0 +1,9 @@
+@import url("https://webglfundamentals.org/webgl/resources/webgl-tutorials.css");
+body {
+  margin: 0;
+}
+canvas {
+  width: 100vw;
+  height: 100vh;
+  display: block;
+}
diff --git a/play_framebuffer_1/main.html b/play_framebuffer_1/main.html
new file mode 100644
index 0000000..ef7b1e4
--- /dev/null
+++ b/play_framebuffer_1/main.html
@@ -0,0 +1,64 @@
+<link rel="stylesheet" href="main.css">
+
+<canvas id="canvas"></canvas>
+
+<!-- vertex shader -->
+<script id="3d-vertex-shader" type="x-shader/x-vertex">
+attribute vec4 a_position;
+attribute vec2 a_texcoord;
+
+varying vec2 v_texcoord;
+
+void main() {
+  // Multiply the position by the matrix.
+  gl_Position = a_position;
+
+  // Pass the texcoord to the fragment shader.
+  v_texcoord = a_texcoord;
+}
+</script>
+<!-- fragment shader -->
+<script id="3d-fragment-shader" type="x-shader/x-fragment">
+precision highp float; 
+precision highp sampler2D;
+
+// Passed in from the vertex shader.
+varying vec2 v_texcoord;
+
+// The texture.
+uniform sampler2D u_texture;
+uniform int flag;
+
+
+void main(){
+	if(flag == 1){
+		gl_FragColor = texture2D(u_texture, v_texcoord);
+	}
+	else{	
+  		vec4 tmp0 = texture2D(u_texture, v_texcoord);
+		vec4 tmp1 = texture2D(u_texture, vec2(v_texcoord.x, v_texcoord.y+1.0/4.0));
+		vec4 tmp2 = texture2D(u_texture, vec2(v_texcoord.x+1.0/4.0, v_texcoord.y));
+		vec4 tmp3 = texture2D(u_texture, vec2(v_texcoord.x+1.0/4.0, v_texcoord.y+1.0/4.0));
+  		float color = (tmp0[0] + tmp1[0] + tmp2[0] + tmp3[0])/4.0; 
+  		gl_FragColor = vec4(color,color,color,1.0);
+	}
+}
+</script>
+
+
+<!--
+for most samples webgl-utils only provides shader compiling/linking and
+canvas resizing because why clutter the examples with code that's the same in every sample.
+See http://webglfundamentals.org/webgl/lessons/webgl-boilerplate.html
+and http://webglfundamentals.org/webgl/lessons/webgl-resizing-the-canvas.html
+for webgl-utils, m3, m4, and webgl-lessons-ui.
+-->
+<script src="https://webglfundamentals.org/webgl/resources/webgl-utils.js"></script>
+<script src="./main.js"></script>
+
+
+<!-- 		vec4 tmp = mix(texture2D(u_texture, v_texcoord), texture2D(u_texture, vec2(v_texcoord.x, v_texcoord.y+1.0/4.0)), 0.5);
+		tmp = mix(tmp, texture2D(u_texture, vec2(v_texcoord.x+1.0/4.0, v_texcoord.y)), 0.5);
+		tmp = mix(tmp, texture2D(u_texture, vec2(v_texcoord.x+1.0/4.0, v_texcoord.y+1.0/4.0)), 0.5);	
+		gl_FragColor = tmp; -->
+
diff --git a/play_framebuffer_1/main.js b/play_framebuffer_1/main.js
new file mode 100644
index 0000000..7a1a1a2
--- /dev/null
+++ b/play_framebuffer_1/main.js
@@ -0,0 +1,219 @@
+"use strict";
+
+function main() {
+  // Get A WebGL context
+  /** @type {HTMLCanvasElement} */
+  var canvas = document.getElementById("canvas");
+  var gl = canvas.getContext("webgl");
+  if (!gl) {
+    return;
+  }
+
+  // setup GLSL program
+  var program = webglUtils.createProgramFromScripts(gl, ["3d-vertex-shader", "3d-fragment-shader"]);
+
+  // look up where the vertex data needs to go.
+  var positionLocation = gl.getAttribLocation(program, "a_position");
+  var texcoordLocation = gl.getAttribLocation(program, "a_texcoord");
+
+  // lookup uniforms
+  var textureLocation = gl.getUniformLocation(program, "u_texture");
+  var flagLocation = gl.getUniformLocation(program, "flag");
+
+  // Create a buffer for positions
+  var positionBuffer = gl.createBuffer();
+  // Bind it to ARRAY_BUFFER (think of it as ARRAY_BUFFER = positionBuffer)
+  gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
+  // Put the positions in the buffer
+  setGeometry(gl);
+
+  // provide texture coordinates for the rectangle.
+  var texcoordBuffer = gl.createBuffer();
+  gl.bindBuffer(gl.ARRAY_BUFFER, texcoordBuffer);
+  // Set Texcoords.
+  setTexcoords(gl);
+
+  // Create a texture.
+  var texture = gl.createTexture();
+  gl.bindTexture(gl.TEXTURE_2D, texture);
+
+  {
+    // fill texture with 3x2 pixels
+    const level = 0;
+    const internalFormat = gl.LUMINANCE;
+    const width = 4;
+    const height = 4;
+    const border = 0;
+    const format = gl.LUMINANCE;
+    const type = gl.UNSIGNED_BYTE;
+    const data = new Uint8Array([
+        0, 255, 0, 255,
+        255, 0, 255, 0,
+        0, 255, 0, 255,
+        255, 0, 255, 0
+    ]);
+    const alignment = 1;
+    gl.pixelStorei(gl.UNPACK_ALIGNMENT, alignment);
+    gl.texImage2D(gl.TEXTURE_2D, level, internalFormat, width, height, border,
+                  format, type, data);
+
+    // set the filtering so we don't need mips and it's not filtered
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+  }
+
+  // Create a texture to render to
+  const targetTextureWidth = 2;
+  const targetTextureHeight = 2;
+  const targetTexture = gl.createTexture();
+  gl.bindTexture(gl.TEXTURE_2D, targetTexture);
+
+  {
+    // define size and format of level 0
+    const level = 0;
+    const internalFormat = gl.RGBA;
+    const border = 0;
+    const format = gl.RGBA;
+    const type = gl.UNSIGNED_BYTE;
+    const data = null;
+    gl.texImage2D(gl.TEXTURE_2D, level, internalFormat,
+                  targetTextureWidth, targetTextureHeight, border,
+                  format, type, data);
+
+    // set the filtering so we don't need mips
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+  }
+
+  // Create and bind the framebuffer
+  const fb = gl.createFramebuffer();
+  gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
+
+  // attach the texture as the first color attachment
+  const attachmentPoint = gl.COLOR_ATTACHMENT0;
+  const level = 0;
+  gl.framebufferTexture2D(gl.FRAMEBUFFER, attachmentPoint, gl.TEXTURE_2D, targetTexture, level);
+
+
+  requestAnimationFrame(drawScene);
+
+
+  function drawCube(flag) {
+    // Tell it to use our program (pair of shaders)
+    gl.useProgram(program);
+
+    // Turn on the position attribute
+    gl.enableVertexAttribArray(positionLocation);
+
+    // Bind the position buffer.
+    gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
+
+    // Tell the position attribute how to get data out of positionBuffer (ARRAY_BUFFER)
+    var size = 3;          // 3 components per iteration
+    var type = gl.FLOAT;   // the data is 32bit floats
+    var normalize = false; // don't normalize the data
+    var stride = 0;        // 0 = move forward size * sizeof(type) each iteration to get the next position
+    var offset = 0;        // start at the beginning of the buffer
+    gl.vertexAttribPointer(
+        positionLocation, size, type, normalize, stride, offset);
+
+    // Turn on the teccord attribute
+    gl.enableVertexAttribArray(texcoordLocation);
+
+    // Bind the position buffer.
+    gl.bindBuffer(gl.ARRAY_BUFFER, texcoordBuffer);
+
+    // Tell the position attribute how to get data out of positionBuffer (ARRAY_BUFFER)
+    var size = 2;          // 2 components per iteration
+    var type = gl.FLOAT;   // the data is 32bit floats
+    var normalize = false; // don't normalize the data
+    var stride = 0;        // 0 = move forward size * sizeof(type) each iteration to get the next position
+    var offset = 0;        // start at the beginning of the buffer
+    gl.vertexAttribPointer(
+        texcoordLocation, size, type, normalize, stride, offset);
+
+
+    // Tell the shader to use texture unit 0 for u_texture
+    gl.uniform1i(textureLocation, 0);
+    gl.uniform1i(flagLocation, flag);
+
+    // Draw the geometry.
+    gl.drawArrays(gl.TRIANGLES, 0, 6);
+  }
+
+  // Draw the scene.
+  function drawScene() {
+
+    {
+      // render to our targetTexture by binding the framebuffer
+      gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
+
+      // render cube with our 3x2 texture
+      gl.bindTexture(gl.TEXTURE_2D, texture);
+
+      // Tell WebGL how to convert from clip space to pixels
+      gl.viewport(0, 0, targetTextureWidth, targetTextureHeight);
+
+      // Clear the canvas AND the depth buffer.
+      gl.clearColor(0, 0, 0, 0);   // clear to blue
+      gl.clear(gl.COLOR_BUFFER_BIT);
+
+      drawCube(0);
+    }
+
+    {
+      // render to the canvas
+      gl.bindFramebuffer(gl.FRAMEBUFFER, null);
+
+      // render the cube with the texture we just rendered to
+      gl.bindTexture(gl.TEXTURE_2D, targetTexture);
+      // gl.bindTexture(gl.TEXTURE_2D, texture);
+
+      // Tell WebGL how to convert from clip space to pixels
+      gl.viewport(0, 0, gl.canvas.width, gl.canvas.height);
+
+      // Clear the canvas AND the depth buffer.
+      gl.clearColor(0, 0, 0, 0);   // clear to white
+      gl.clear(gl.COLOR_BUFFER_BIT);
+
+      drawCube(1);
+    }
+
+    requestAnimationFrame(drawScene);
+  }
+}
+
+// Fill the buffer with the values that define a cube.
+function setGeometry(gl) {
+  var positions = new Float32Array(
+    [
+    -1.0, -1.0,  0.0,
+    -1.0,  1.0,  0.0,
+     1.0, -1.0,  0.0,
+    -1.0,  1.0,  0.0,
+     1.0,  1.0,  0.0,
+     1.0, -1.0,  0.0,
+    ]);
+  gl.bufferData(gl.ARRAY_BUFFER, positions, gl.STATIC_DRAW);
+}
+
+// Fill the buffer with texture coordinates the cube.
+function setTexcoords(gl) {
+  gl.bufferData(
+      gl.ARRAY_BUFFER,
+      new Float32Array(
+        [
+          0, 0,
+          0, 1,
+          1, 0,
+          0, 1,
+          1, 1,
+          1, 0,
+      ]),
+      gl.STATIC_DRAW);
+}
+
+main();
diff --git a/play_framebuffer_2/main.css b/play_framebuffer_2/main.css
new file mode 100644
index 0000000..a7f28b9
--- /dev/null
+++ b/play_framebuffer_2/main.css
@@ -0,0 +1,9 @@
+@import url("https://webglfundamentals.org/webgl/resources/webgl-tutorials.css");
+body {
+  margin: 0;
+}
+canvas {
+  width: 100vw;
+  height: 100vh;
+  display: block;
+}
diff --git a/play_framebuffer_2/main.html b/play_framebuffer_2/main.html
new file mode 100644
index 0000000..92adfe7
--- /dev/null
+++ b/play_framebuffer_2/main.html
@@ -0,0 +1,66 @@
+<link rel="stylesheet" href="main.css">
+
+<canvas id="canvas"></canvas>
+
+<!-- vertex shader -->
+<script id="3d-vertex-shader" type="x-shader/x-vertex">
+attribute vec4 a_position;
+attribute float a_texcoord;
+varying float v_texcoord;
+
+void main() {
+  gl_Position = a_position;
+  v_texcoord = a_texcoord;
+}
+</script>
+<!-- fragment shader -->
+<script id="3d-fragment-shader" type="x-shader/x-fragment">
+precision highp float; 
+varying float v_texcoord;
+uniform sampler2D u_texture;
+uniform int flag;
+
+void main(){
+  if(flag == 0){
+    float sum = 0.0;
+    for(float i = 0.0; i < 1024.0; i++){
+      sum += texture2D(u_texture, vec2(v_texcoord, (i+0.5)/1024.0)).a;
+    }
+    sum /= 1024.0;
+    gl_FragColor = vec4(0.0, texture2D(u_texture, vec2(v_texcoord, (88.0+0.5)/1024.0)).a, 0.0, 1.0);
+  }
+  else{
+    gl_FragColor = texture2D(u_texture, vec2(v_texcoord,0.5));
+  }
+}
+</script>
+
+
+<!--
+for most samples webgl-utils only provides shader compiling/linking and
+canvas resizing because why clutter the examples with code that's the same in every sample.
+See http://webglfundamentals.org/webgl/lessons/webgl-boilerplate.html
+and http://webglfundamentals.org/webgl/lessons/webgl-resizing-the-canvas.html
+for webgl-utils, m3, m4, and webgl-lessons-ui.
+-->
+<script src="https://webglfundamentals.org/webgl/resources/webgl-utils.js"></script>
+<script src="./main.js"></script>
+
+
+<!-- 		vec4 tmp = mix(texture2D(u_texture, v_texcoord), texture2D(u_texture, vec2(v_texcoord.x, v_texcoord.y+1.0/4.0)), 0.5);
+		tmp = mix(tmp, texture2D(u_texture, vec2(v_texcoord.x+1.0/4.0, v_texcoord.y)), 0.5);
+		tmp = mix(tmp, texture2D(u_texture, vec2(v_texcoord.x+1.0/4.0, v_texcoord.y+1.0/4.0)), 0.5);	
+		gl_FragColor = tmp; -->
+
+
+<!-- precision highp float; 
+varying float v_texcoord;
+uniform sampler2D u_texture;
+
+void main(){ 
+    float sum = 0.0;
+    for(float i = 0.0; i < 1024.0; i++){
+        sum += texture2D(u_texture, vec2(v_texcoord, i/1024.0)).a;
+    }
+    gl_FragColor = vec4(0,0,0,sum); 
+} -->
\ No newline at end of file
diff --git a/play_framebuffer_2/main.js b/play_framebuffer_2/main.js
new file mode 100644
index 0000000..bf7c58d
--- /dev/null
+++ b/play_framebuffer_2/main.js
@@ -0,0 +1,278 @@
+"use strict";
+
+function main() {
+  // Get A WebGL context
+  /** @type {HTMLCanvasElement} */
+  var canvas = document.getElementById("canvas");
+  var gl = canvas.getContext("webgl");
+  if (!gl) {
+    return;
+  }
+
+  // var blendExt = gl.getExtension("EXT_blend_minmax");
+  // if (blendExt) {
+  //     gl.MAX_EXT = blendExt.MAX_EXT;
+  //     gl.MIN_EXT = blendExt.MIN_EXT;
+  // }
+  // gl.ext = gl.getExtension("ANGLE_instanced_arrays");
+  gl.getExtension("OES_texture_float");
+  gl.getExtension("OES_texture_float_linear");
+
+  // setup GLSL program
+  var program = webglUtils.createProgramFromScripts(gl, ["3d-vertex-shader", "3d-fragment-shader"]);
+
+  // look up where the vertex data needs to go.
+  var positionLocation = gl.getAttribLocation(program, "a_position");
+  var texcoordLocation = gl.getAttribLocation(program, "a_texcoord");
+
+  // lookup uniforms
+  var textureLocation = gl.getUniformLocation(program, "u_texture");
+  var flagLocation = gl.getUniformLocation(program, "flag");
+
+  // Create a buffer for positions
+  var positionBuffer = gl.createBuffer();
+  // Bind it to ARRAY_BUFFER (think of it as ARRAY_BUFFER = positionBuffer)
+  gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
+  // Put the positions in the buffer
+  setGeometry(gl);
+
+  // provide texture coordinates for the rectangle.
+  var texcoordBuffer = gl.createBuffer();
+  gl.bindBuffer(gl.ARRAY_BUFFER, texcoordBuffer);
+  // Set Texcoords.
+  setTexcoords(gl);
+
+  // Create a texture.
+  var texture = gl.createTexture();
+  gl.bindTexture(gl.TEXTURE_2D, texture);
+
+  {
+    // fill texture with 3x2 pixels
+    const level = 0;
+    const internalFormat = gl.ALPHA;
+    const width = 1024;
+    const height = 1024;
+    const border = 0;
+    const format = gl.ALPHA;
+    const type = gl.FLOAT;
+    // const type = gl.UNSIGNED_BYTE;
+
+    // var data = [];
+    // for(var j = 0; j < 100; j++){
+    //     var typedArray = new Float32Array(1024*1024);
+    //     for (var i = 0; i < typedArray.length; i++){
+    //         typedArray[i] = Math.random();
+    //     }  
+    //     data.push(typedArray);  
+    // }
+
+    var data = new Float32Array(1024*1024);
+    for(var i = 0; i < data.length; i++){
+      data[i] = Math.random();
+    }
+
+    // var typedArray = new Float32Array(1024*1024);
+    // var typedArray = new Uint8Array(1024*1024);
+
+    const alignment = 1;
+    gl.pixelStorei(gl.UNPACK_ALIGNMENT, alignment);
+    gl.texImage2D(gl.TEXTURE_2D, level, internalFormat, width, height, border,
+                  format, type, data);
+
+    // set the filtering so we don't need mips and it's not filtered
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+  }
+
+  // Create a texture to render to
+  const targetTextureWidth = 1024;
+  const targetTextureHeight = 1;
+  const targetTexture = gl.createTexture();
+  gl.bindTexture(gl.TEXTURE_2D, targetTexture);
+
+  {
+    // define size and format of level 0
+    const level = 0;
+    const internalFormat = gl.RGBA;
+    const border = 0;
+    const format = gl.RGBA;
+    const type = gl.FLOAT;
+    // const type = gl.UNSIGNED_BYTE;
+    gl.texImage2D(gl.TEXTURE_2D, level, internalFormat,
+                  targetTextureWidth, targetTextureHeight, border,
+                  format, type, null);
+
+    // set the filtering so we don't need mips
+    // gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
+    // gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+    // gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+    // 
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
+    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
+  }
+
+  // Create and bind the framebuffer
+  const fb = gl.createFramebuffer();
+  gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
+
+  // attach the texture as the first color attachment
+  const attachmentPoint = gl.COLOR_ATTACHMENT0;
+  const level = 0;
+  gl.framebufferTexture2D(gl.FRAMEBUFFER, attachmentPoint, gl.TEXTURE_2D, targetTexture, level);
+
+
+  requestAnimationFrame(drawScene);
+
+
+  function drawCube(flag) {
+    // Tell it to use our program (pair of shaders)
+    gl.useProgram(program);
+
+    // Turn on the position attribute
+    gl.enableVertexAttribArray(positionLocation);
+
+    // Bind the position buffer.
+    gl.bindBuffer(gl.ARRAY_BUFFER, positionBuffer);
+
+    // Tell the position attribute how to get data out of positionBuffer (ARRAY_BUFFER)
+    var size = 2;          // 3 components per iteration
+    var type = gl.FLOAT;   // the data is 32bit floats
+    var normalize = false; // don't normalize the data
+    var stride = 0;        // 0 = move forward size * sizeof(type) each iteration to get the next position
+    var offset = 0;        // start at the beginning of the buffer
+    gl.vertexAttribPointer(
+        positionLocation, size, type, normalize, stride, offset);
+
+    // Turn on the teccord attribute
+    gl.enableVertexAttribArray(texcoordLocation);
+
+    // Bind the position buffer.
+    gl.bindBuffer(gl.ARRAY_BUFFER, texcoordBuffer);
+
+    // Tell the position attribute how to get data out of positionBuffer (ARRAY_BUFFER)
+    var size = 1;          // 2 components per iteration
+    var type = gl.FLOAT;   // the data is 32bit floats
+    var normalize = false; // don't normalize the data
+    var stride = 0;        // 0 = move forward size * sizeof(type) each iteration to get the next position
+    var offset = 0;        // start at the beginning of the buffer
+    gl.vertexAttribPointer(
+        texcoordLocation, size, type, normalize, stride, offset);
+
+
+    // Tell the shader to use texture unit 0 for u_texture
+    gl.uniform1i(textureLocation, 0);
+    gl.uniform1i(flagLocation, flag);
+
+    // Draw the geometry.
+    gl.drawArrays(gl.LINES, 0, 2);
+  }
+
+  // Draw the scene.
+  function drawScene() {
+
+    {
+      // render to our targetTexture by binding the framebuffer
+      gl.bindFramebuffer(gl.FRAMEBUFFER, fb);
+
+      // render cube with our 3x2 texture
+      gl.bindTexture(gl.TEXTURE_2D, texture);
+
+      // Tell WebGL how to convert from clip space to pixels
+      gl.viewport(0, 0, targetTextureWidth, targetTextureHeight);
+
+      // Clear the canvas AND the depth buffer.
+      gl.clearColor(0, 0, 0, 0);   // clear to blue
+      gl.clear(gl.COLOR_BUFFER_BIT);
+
+      drawCube(0);
+    }
+
+    {
+      // render to the canvas
+      gl.bindFramebuffer(gl.FRAMEBUFFER, null);
+
+      // render the cube with the texture we just rendered to
+      gl.bindTexture(gl.TEXTURE_2D, targetTexture);
+      // gl.bindTexture(gl.TEXTURE_2D, texture);
+
+      // Tell WebGL how to convert from clip space to pixels
+      gl.viewport(0, 0, gl.canvas.width, gl.canvas.height);
+
+      // Clear the canvas AND the depth buffer.
+      gl.clearColor(0, 0, 0, 0);   // clear to white
+      gl.clear(gl.COLOR_BUFFER_BIT);
+
+      drawCube(1);
+    }
+
+    requestAnimationFrame(drawScene);
+  }
+}
+
+// Fill the buffer with the values that define a cube.
+// function setGeometry(gl) {
+//   var positions = new Float32Array(
+//     [
+//     -1.0, -1.0,  0.0,
+//     -1.0,  1.0,  0.0,
+//      1.0, -1.0,  0.0,
+//     -1.0,  1.0,  0.0,
+//      1.0,  1.0,  0.0,
+//      1.0, -1.0,  0.0,
+//     ]);
+//   gl.bufferData(gl.ARRAY_BUFFER, positions, gl.STATIC_DRAW);
+// }
+function setGeometry(gl) {
+  var positions = new Float32Array(
+    [
+    -1.0, -1.0,
+    1.0,  1.0,
+    ]);
+  gl.bufferData(gl.ARRAY_BUFFER, positions, gl.STATIC_DRAW);
+}
+// function setTexcoords(gl) {
+//   gl.bufferData(
+//       gl.ARRAY_BUFFER,
+//       new Float32Array(
+//         [
+//           0, 0,
+//           0, 1,
+//           1, 0,
+//           0, 1,
+//           1, 1,
+//           1, 0,
+//       ]),
+//       gl.STATIC_DRAW);
+// }
+// Fill the buffer with texture coordinates the cube.
+// function setTexcoords(gl) {
+//   gl.bufferData(
+//       gl.ARRAY_BUFFER,
+//       new Float32Array(
+//         [
+//           0.0, 0.0,
+//           1.0, 0.0,
+//           0.0, 0.0,
+//           1.0, 0.0,
+//           1.0, 0.0,
+//           0.0, 0.0,
+//       ]),
+//       gl.STATIC_DRAW);
+// }
+function setTexcoords(gl) {
+  gl.bufferData(
+      gl.ARRAY_BUFFER,
+      new Float32Array(
+        [
+          0.0,
+          1.0,
+      ]),
+      gl.STATIC_DRAW);
+}
+
+
+main();
diff --git a/src/attribute.js b/src/attribute.js
index 6f404d3..51fb398 100644
--- a/src/attribute.js
+++ b/src/attribute.js
@@ -1,18 +1,27 @@
-export default function Attribute(glContext) {
-    
+export default function Attribute(glContext) 
+{
     var attribute = (this instanceof Attribute) ? this : {},
         ctx = glContext,
         attributeID = 0;
 
-    function setAttribute(name, data) {
-        if(Array.isArray(data) || ArrayBuffer.isView(data)){
-            if(!ArrayBuffer.isView(data)) data = new Float32Array(data);
+    function setAttribute(name, data) 
+    {
+        if( Array.isArray(data) || ArrayBuffer.isView(data) )
+        {
+            if(!ArrayBuffer.isView(data)) 
+            {
+                data = new Float32Array(data);
+            }
             attribute[name].data = data;
             ctx.bindBuffer(ctx.ARRAY_BUFFER, attribute[name].ptr);
             ctx.bufferData(ctx.ARRAY_BUFFER, data, ctx.STATIC_DRAW);
+            // console.log(attribute[name].ptr === attribute[name].old_ptr);
+            // attribute[name].old_ptr = attribute[name].ptr;
         }
     }
-    attribute.create = function(name, type, data) {
+
+    attribute.create = function(name, type, data) 
+    {
         attribute[name] = {
             name: name,
             type: type || 'float',
@@ -22,9 +31,11 @@ export default function Attribute(glContext) {
             size: parseInt(type.slice(3,4)) || 1
         };
 
-        if(data !== null && data.length) setAttribute(name, data);
+        if(data !== null && data.length) 
+            {setAttribute(name, data);}
 
-        attribute[name].link = function(program) {
+        attribute[name].link = function(program) 
+        {
             ctx.bindBuffer(ctx.ARRAY_BUFFER, this.ptr);
             this.location = ctx.getAttribLocation(program, this.name);
             ctx.vertexAttribPointer(this.location, this.size, ctx.FLOAT, false, 0, 0);
@@ -32,14 +43,15 @@ export default function Attribute(glContext) {
             return this;
         }
 
-        attribute[name].load = function(arrayBuffer) {
+        attribute[name].load = function(arrayBuffer) 
+        {
             setAttribute(this.name, arrayBuffer);
             return this;
         }
 
-        attribute[name].header = function() {
-            return 'attribute ' + this.type + ' ' + this.name + ';\n';
-        }
+        attribute[name].header = function() 
+            {return 'attribute ' + this.type + ' ' + this.name + ';\n';}
+        
 
         attribute[name].delete = function() {
             ctx.deleteBuffer(this.ptr);
diff --git a/src/flexgl.js b/src/flexgl.js
index ff3db89..913f59f 100644
--- a/src/flexgl.js
+++ b/src/flexgl.js
@@ -1,12 +1,14 @@
 import Resource from './resource';
-import ProgramManager from './program';
-import Shader from './shader';
+import Program from './program';
 import Framebuffer from './framebuffer';
+// import Reactive from './reactive';
 
 export default function FlexGL(arg) {
 
-    var flexgl = (this instanceof FlexGL) ? this : {},
-        options = arg || {},
+    var flexgl = (this instanceof FlexGL) ? this : {};
+
+
+    var options = arg || {},
         container = options.container || null,
         canvas = options.canvas || document.createElement("canvas"),
         width = options.width || null,
@@ -19,10 +21,10 @@ export default function FlexGL(arg) {
         },
         ctx = options.context || options.ctx || null,
         kernels = {},
-        program = null,
         sharedFunction = options.sharedFunction || {};
 
 
+
     if (typeof(canvas) == "string") {
         if (canvas[0] == "#") canvas = document.getElementById(cavnas.substring(1));
         else canvas = document.getElementById(cavnas);
@@ -40,25 +42,25 @@ export default function FlexGL(arg) {
     canvas.style.marginLeft = padding.left + "px";
     canvas.style.marginTop = padding.top + "px";
 
+
     if (ctx === null)
         ctx = setupWebGL(canvas);
     flexgl.ctx = ctx;
     flexgl.canvas = canvas;
-
+    flexgl.resources = resources;
     ctx._dict = options.env || options.dict || options.dictionary || {};
 
-
     var resources = new Resource(ctx),
         framebuffers = new Framebuffer(ctx),
-        programManager = new ProgramManager(ctx, resources),
-        shaders = new Shader(ctx, resources);
+        program = new Program(ctx, resources),
+        realProgram = null;
+
 
     var blendExt = ctx.getExtension("EXT_blend_minmax");
     if (blendExt) {
         ctx.MAX_EXT = blendExt.MAX_EXT;
         ctx.MIN_EXT = blendExt.MIN_EXT;
     }
-
     ctx.ext = ctx.getExtension("ANGLE_instanced_arrays");
     enableExtension([
         "OES_texture_float",
@@ -66,10 +68,10 @@ export default function FlexGL(arg) {
         // "OES_texture_half_float",
         // "OES_texture_half_float_linear"
     ]);
-
     if (container)
         container.appendChild(canvas);
 
+
     function setupWebGL(canvas) {
         var names = ["webgl", "experimental-webgl"];
         var gl = null;
@@ -95,7 +97,6 @@ export default function FlexGL(arg) {
             }
         });
     };
-
     flexgl.enableExtension = enableExtension;
 
     /**
@@ -107,17 +108,19 @@ export default function FlexGL(arg) {
      */
     flexgl.attribute = function(name, type, data) {
         resources.allocate("attribute", name, type, data);
-        Object.defineProperty(flexgl.attribute, name, {
-            get: function() {
-                return resources.attribute[name];
-            },
-            set: function(data) {
-                resources.attribute[name].load(data);
-            }
-        });
+        if (!flexgl.attribute.hasOwnProperty(name)) {
+            Object.defineProperty(flexgl.attribute, name, { //after allocating, flexgl gets new key attribute, helping easily change attribute data.
+                get(){
+                    return resources.attribute[name];
+                },
+                set(data){
+                    resources.attribute[name].load(data);
+                }
+            });
+        }
         return flexgl;
     };
-    flexgl.buffer = flexgl.attribute; //alias
+    // flexgl.buffer = flexgl.attribute; //alias
 
     /**
      * Create a Uniform variable for WebGL shader programs
@@ -135,8 +138,8 @@ export default function FlexGL(arg) {
                 },
                 set: function(data) {
                     resources.uniform[name].load(data);
-                    if (ctx.isProgram(program))
-                        resources.uniform[name].link(program);
+                    if (ctx.isProgram(realProgram))                    ///////////////////
+                        resources.uniform[name].link(realProgram);        /////////////////
                 }
             });
         }
@@ -200,8 +203,8 @@ export default function FlexGL(arg) {
      */
     flexgl.framebuffer = function(name, type, dim, texture) {
         var texture = texture || resources.allocate('texture', name, type, dim, 'rgba', null);
-
         framebuffers.create(name, type, dim, texture);
+
         if (!flexgl.framebuffer.hasOwnProperty(name)) {
             Object.defineProperty(flexgl.framebuffer, name, {
                 get: function() {
@@ -212,7 +215,7 @@ export default function FlexGL(arg) {
         return flexgl;
     }
 
-    flexgl.framebuffer.enableRead = function(name) {
+    flexgl.framebuffer.enableRead = function(name, program) {
         framebuffers[name].enableRead(program);
     }
 
@@ -251,31 +254,13 @@ export default function FlexGL(arg) {
     }
 
     flexgl.dictionary = flexgl.parameter;
+    flexgl.shader = program.shader;
 
-    flexgl.shader = programManager.shader;
-
-    flexgl.program = function(name, vs, fs) {
-        program = programManager.program(name, vs, fs);
-        return ctx;
-    }
-
-    flexgl.createProgram = function(name, vs, fs) {
-        program = programManager.create(name, vs, fs);
-        return ctx;
-    }
-
-    flexgl.app = function(name, props) {
-        var vs = flexgl.shader.vertex(props.vs),
-            fs = flexgl.shader.fragment(props.fs),
-            fb = props.framebuffer || null;
-
-        flexgl.program(name, vs, fs);
 
-        var draw = props.render || props.draw;
-
-        return function(args) {
-            var gl = flexgl.program(name);
-            return draw.call(gl, args);
+    flexgl.app = function(name, options) {
+        return function(args){
+            realProgram = program.use(name, options.vertex_shader_source, options.fragment_shader_source);
+            return options.render.call(flexgl, args);
         }
     }
 
@@ -283,7 +268,6 @@ export default function FlexGL(arg) {
         return [canvas.width, canvas.height];
     }
 
-    flexgl.resources = resources;
-
     return flexgl;
 }
+
diff --git a/src/framebuffer.js b/src/framebuffer.js
index 2a50cb7..2d2bc97 100644
--- a/src/framebuffer.js
+++ b/src/framebuffer.js
@@ -14,25 +14,25 @@ export default function Framebuffer(glContext) {
             width: dim[0] || 1024,
             height: dim[1] || 1024,
             texture: texture || null,
-            renderbuffer: ctx.createRenderbuffer(),
+            // renderbuffer: ctx.createRenderbuffer(),
         }
 
-        if (framebuffer[name].texture === null) {
-            var buf = (type == 'float') ?
-                new Float32Array(dim[0] * dim[1] * 4) :
-                new Uint8Array(dim[0] * dim[1] * 4);
-            framebuffer[name].texture = Texture(ctx).create(name, type, dim, "rgba", buf);
-        }
+        // if (framebuffer[name].texture === null) {
+        //     var buf = (type == 'float') ?
+        //         new Float32Array(dim[0] * dim[1] * 4) :
+        //         new Uint8Array(dim[0] * dim[1] * 4);
+        //     framebuffer[name].texture = Texture(ctx).create(name, type, dim, "rgba", buf);
+        // }
 
-        var renderbuffer = framebuffer[name].renderbuffer;
+        // var renderbuffer = framebuffer[name].renderbuffer;
         ctx.bindFramebuffer(ctx.FRAMEBUFFER, framebuffer[name].ptr);
-        ctx.bindRenderbuffer(ctx.RENDERBUFFER, renderbuffer);
-        ctx.renderbufferStorage(
-            ctx.RENDERBUFFER,
-            ctx.DEPTH_COMPONENT16,
-            framebuffer[name].width,
-            framebuffer[name].height
-        );
+        // ctx.bindRenderbuffer(ctx.RENDERBUFFER, renderbuffer);
+        // ctx.renderbufferStorage(
+        //     ctx.RENDERBUFFER,
+        //     ctx.DEPTH_COMPONENT16,
+        //     framebuffer[name].width,
+        //     framebuffer[name].height
+        // );
         ctx.framebufferTexture2D(
             ctx.FRAMEBUFFER,
             ctx.COLOR_ATTACHMENT0,
@@ -40,13 +40,13 @@ export default function Framebuffer(glContext) {
             framebuffer[name].texture.ptr,
             0
         );
-        ctx.framebufferRenderbuffer(
-            ctx.FRAMEBUFFER,
-            ctx.DEPTH_ATTACHMENT,
-            ctx.RENDERBUFFER,
-            renderbuffer
-        );
-        ctx.bindRenderbuffer(ctx.RENDERBUFFER, null);
+        // ctx.framebufferRenderbuffer(
+        //     ctx.FRAMEBUFFER,
+        //     ctx.DEPTH_ATTACHMENT,
+        //     ctx.RENDERBUFFER,
+        //     renderbuffer
+        // );
+        // ctx.bindRenderbuffer(ctx.RENDERBUFFER, null);
         ctx.bindFramebuffer(ctx.FRAMEBUFFER, null);
 
         framebuffer[name].enableRead = function(program) {
@@ -56,6 +56,10 @@ export default function Framebuffer(glContext) {
             ctx.uniform1i(this.texture.location, this.texture.index);
         };
 
+        // framebuffer[name].enableRead = function(program) {
+        //     this.texture.link(program);
+        // };
+
         framebuffer[name].delete = function() {
             ctx.bindRenderbuffer(gl.RENDERBUFFER, null);
             ctx.bindFramebuffer(gl.FRAMEBUFFER, null);
diff --git a/src/program.js b/src/program.js
index 8bb88a9..67271f3 100644
--- a/src/program.js
+++ b/src/program.js
@@ -2,26 +2,24 @@ import Shader from './shader';
 
 export default function Program(glContext, resources) {
 
-    var program,
+    var program = {},
         ctx = glContext,
-        pm = {},
         kernels = {},
-        shaders = new Shader(glContext, resources);
+        shader = new Shader(glContext);
 
-    pm.create = function(name, vs, fs) {
+    program.create = function(name, vs, fs) {
         var name = name || "default",
             vs = vs || "default",
             fs = fs || "default",
             deps = [];
 
         if (kernels.hasOwnProperty(name)) {
-            pm.delete(name);
+            this.delete(name);
         }
 
         kernels[name] = ctx.createProgram();
-
-        kernels[name].vs = (typeof vs == "object") ? vs : shaders.vertex[vs];
-        kernels[name].fs = (typeof fs == "object") ? fs : shaders.fragment[fs];
+        kernels[name].vs = vs;
+        kernels[name].fs = fs;
 
         ctx.attachShader(kernels[name], kernels[name].vs);
         ctx.attachShader(kernels[name], kernels[name].fs);
@@ -31,28 +29,30 @@ export default function Program(glContext, resources) {
             var lastError = ctx.getProgramInfoLog(kernels[name]);
             throw ("Error in program linking:" + lastError);
             ctx.deleteProgram(kernels[name]);
-            return null;
         }
 
         deps = deps.concat(kernels[name].vs.deps);
         deps = deps.concat(kernels[name].fs.deps);
         kernels[name].deps = deps;
 
-        return kernels[name];
     }
 
-    pm.use = pm.program = function(name, vs, fs) {
+    program.use = function(name, vertex_shader_source, fragment_shader_source) {
         if (kernels.hasOwnProperty(name)) {
-            program = kernels[name];
-            ctx.useProgram(program);
-            resources.link(program, program.deps);
-            return program;
-        } else {
-            return pm.create(name, vs, fs);
+            ctx.useProgram(kernels[name]);
+            resources.link(kernels[name], kernels[name].deps);
+            return kernels[name];
+        } 
+        else {
+            shader.create(name, vertex_shader_source, fragment_shader_source);
+            this.create(name, shader[name].vs, shader[name].fs);
+            ctx.useProgram(kernels[name]);
+            resources.link(kernels[name], kernels[name].deps);
+            return kernels[name];
         }
     }
 
-    pm.delete = function(name) {
+    program.delete = function(name) {
         if (kernels.hasOwnProperty(name)) {
             ctx.detachShader(kernels[name], kernels[name].vs);
             ctx.detachShader(kernels[name], kernels[name].fs);
@@ -61,27 +61,5 @@ export default function Program(glContext, resources) {
         }
     }
 
-    pm.shader = function(arg, fn) {
-        var options = arg;
-        shaders.create(options, fn);
-        return pm;
-    }
-
-    pm.shader.vertex = function(fn) {
-        var options = {
-            type: "vertex"
-        };
-        if (fn.name) options.name = fn.name;
-        return shaders.create(options, fn);
-    }
-
-    pm.shader.fragment = function(fn) {
-        var options = {
-            type: "fragment"
-        };
-        if (fn.name) options.name = fn.name;
-        return shaders.create(options, fn);
-    }
-
-    return pm;
+    return program;
 }
diff --git a/src/reactive.js b/src/reactive.js
new file mode 100644
index 0000000..c03f55f
--- /dev/null
+++ b/src/reactive.js
@@ -0,0 +1,31 @@
+function Reactive(data, chunk)
+{
+	var reactive = (this instanceof Reactive) ? this : {
+		pointer : -1,
+		size: chunk,
+		data_all: data
+	};
+		
+	reactive.updateButton = document.querySelector('.update');
+	reactive.updateClickStream = Rx.Observable.fromEvent(reactive.updateButton, 'click');
+
+	reactive.requestStream = reactive.updateClickStream.startWith('startup click')
+		.flatMap(function(){
+			reactive.pointer++;
+			return reactive.pointer;
+		});
+
+	reactive.responseStream = reactive.requestStream
+		.flatMap(function(p){
+			return reactive.data_all.slice(p*reactive.size, (p+1)*reactive.size);
+		});
+
+	reactive.responseStream.subscribe(function(d){
+		reactive.data_chunk = d;
+		reactive.sum += reactive.data_chunk.reduce(function(x,y){
+			return x+y;
+		})
+	});
+
+	return reactive;
+}
diff --git a/src/resource.js b/src/resource.js
index 284219a..02c629f 100644
--- a/src/resource.js
+++ b/src/resource.js
@@ -4,7 +4,8 @@ import Texture from './texture';
 import Varying from './varying';
 import Subroutine from './subroutine';
 
-export default function Resource(glContext) {
+export default function Resource(glContext) 
+{
     var resource = (this instanceof Resource) ? this : {},
         gpuResources = {};
 
@@ -16,38 +17,36 @@ export default function Resource(glContext) {
 
     var resourceTypes = ['uniform', 'attribute', 'texture', 'varying', 'subroutine'];
 
-    resource.allocate = function(type, props) {
-        if (resourceTypes.indexOf(type) === -1) {
-            throw Error("Error: Invalid resource type: " + type);
-        }
+    resource.allocate = function(type) 
+    {
+        if (resourceTypes.indexOf(type) === -1)  { throw Error("Error: Invalid resource type: " + type); }
+        
         var res = resource[type].create.apply(null, Array.prototype.slice.call(arguments, 1));
         res.resourceType = type;
         gpuResources[res.name] = res;
-        if (!gpuResources.hasOwnProperty(res.name)) {
+
+        if (!gpuResources.hasOwnProperty(res.name)) 
+        {
             Object.defineProperty(gpuResources, res.name, {
-                get: function() {
-                    return gpuResources[res.name];
-                },
-                set: function(data) {
-                    gpuResources[res.name].load(data);
-                }
+                get: function() { return gpuResources[res.name];},
+                set: function(data) { gpuResources[res.name].load(data);}
             });
         }
         return res;
     };
 
-    resource.link = function(program, resources) {
-        var requiredResources = (Array.isArray(resources)) ? resources : Object.keys(gpuResources);
-        requiredResources.forEach(function(resourceName) {
-            if (gpuResources.hasOwnProperty(resourceName))
+    resource.link = function(program, resource_names) {
+        var requiredResourceNames = (Array.isArray(resource_names)) ? resource_names : Object.keys(gpuResources);
+        requiredResourceNames.forEach(function(resourceName) {
+            if (gpuResources.hasOwnProperty(resourceName)) {
                 gpuResources[resourceName].link(program);
+            }
         })
     };
 
     resource.get = function(name) {
         return gpuResources[name];
     }
-
     resource.create = resource.allocate;
 
     return resource;
diff --git a/src/shader.js b/src/shader.js
index 6003c99..9001ae7 100644
--- a/src/shader.js
+++ b/src/shader.js
@@ -1,227 +1,46 @@
-export default function Shader(glContext, glResource) {
+export default function Shader(glContext) {
     
     var shader = (this instanceof Shader) ? this : {},
-        ctx = glContext,
-        resource = glResource,
-        parameters = ctx._dict || {};
-
-    shader.vertex = {};
-    shader.fragment = {};
-
-    var shaderType = {
-        vertex: ctx.VERTEX_SHADER,
-        fragment: ctx.FRAGMENT_SHADER
-    };
-
-    // Convert JS functions to GLSL codes
-    function toGLSL(returnType, name, fn){
-
-        var glsl = returnType + ' ' +
-            name + '(' + applyEnvParameters(fn.toString())
-            .replace(
-                /var\s+([\w|\d]+)\s*=\s*new\s+([\w|\d]+)\((.*)\)/g,
-                function(expr, name, dtype, value){
-                    var parts;
-                    if(value)
-                        parts = [dtype.toLowerCase(), name, '=', value];
-                    else
-                        parts = [dtype.toLowerCase(), name];
-
-                    return parts.join(' ')
-                }
-            )
-            .replace(/for\s*\(\s*var\s+/g, 'for(int ')
-            .replace(/var\s/g, 'float ')
-            .replace(/this./g, '')
-            .replace(/\$(.*)\((.*)\)\s*(=|;)/g, "$1 $2 $3");
-            // .replace(/\$(.*?)\./g, "$1 ")
-
-        if(name == "main") {
-            glsl = glsl.replace(/function.*\(\s*([\s\S]*?)\s*{/, '){') + "\n";
-        } else {
-            var args = glsl.match(/function.*\(\s*([\s\S]*?)\s*\)/)[1];
-
-            if(args != "") {
-                args = args.replace(/\$([\w|\d]+)_/g, "$1 ");
+        ctx = glContext;
+        // resource = glResource,
+        // parameters = ctx._dict || {};
+
+    shader.create = function(name, vertex_shader_source, fragment_shader_source){
+        shader[name] = {
+            name: name,
+            vertex_shader_source: vertex_shader_source, 
+            fragment_shader_source: fragment_shader_source, 
+            vs: createShader(ctx, ctx.VERTEX_SHADER, vertex_shader_source),
+            fs: createShader(ctx, ctx.FRAGMENT_SHADER, fragment_shader_source)
+        }
+
+        shader[name].vs.deps = [];
+        addDeps(vertex_shader_source, shader[name].vs.deps);
+        shader[name].fs.deps = [];
+        addDeps(fragment_shader_source, shader[name].vs.deps);
+
+        function createShader(gl, type, source) {
+            var shader = gl.createShader(type);
+            gl.shaderSource(shader, source);
+            gl.compileShader(shader);
+            var success = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
+            if (success) {
+                return shader;
             }
-            glsl = glsl
-                .replace(/function.*\(\s*([\s\S]*?)\s*\)/, args+')') + "\n";
-        }
-        return glsl;
-    }
-
-    //set parameters in JS functions before converting to GLSL codes
-    function applyEnvParameters(str){
-        //find all $(...) and replace them with parameters
-        var envParam = Object.keys(parameters);
-        if(envParam.length > 0){
-            var re = new RegExp("\\$\\(("+envParam.join("|")+")\\)","g");
-            str = str.replace(re, function(matched){
-                return parameters[matched.slice(2,matched.length-1)];
-            });
-        }
-
-        // Make uniforms to be used as parameters in shaders, like $(uniformName)
-        // var envUniforms = Object.keys(resource.uniform);
-        // re = new RegExp("\\$\\(("+envUniforms.join("|")+")\\)","g");
-        // str = str.replace(re, function(matched){
-        //     return resource.uniform[matched.slice(2,matched.length-1)].data;
-        // });
-
-        return str;
-    }
-
-    function compile(shaderType, shaderSource) {
-        if (shaderType !== ctx.VERTEX_SHADER && shaderType !== ctx.FRAGMENT_SHADER) {
-            throw ("Error: unknown shader type");
-        }
-        var _shader = ctx.createShader(shaderType);
-        ctx.shaderSource(_shader, shaderSource);
-        ctx.compileShader(_shader);
-
-        // Check the compile status, get compile error if any
-        var compiled = ctx.getShaderParameter(_shader, ctx.COMPILE_STATUS);
-        if (!compiled) {
-            var lastError = ctx.getShaderInfoLog(_shader);
-            console.log(shaderSource + '\n ====================================================');
-            throw new Error("Error compiling shader '" + _shader + "':" + lastError);
-
-            ctx.deleteShader(_shader);
-            return null;
+            // console.log('NO!');
+            console.log(gl.getShaderInfoLog(shader));
+            gl.deleteShader(shader);
         }
 
-        return _shader;
-    }
-
-    function getDeps(fn) {
-        var deps = [],
-            sourceCode = fn.toString(),
-            shaderArgs = sourceCode.match(/function\s.*?\(([^)]*)\)/),
-            args = (shaderArgs !== null && shaderArgs.length) ? shaderArgs[1] : [];
-        // args = args.replace(/(?:\r\n|\r|\n|\s)/g, '');
-        //
-        if(args.length) {
-            deps = args.split(',').map(function(arg) {
-                return arg.replace(/\/\*.*\*\//, '').trim();
-            }).filter(function(arg) {
-                return arg;
-            });
-        }
-
-        var extraDeps = getExtraDeps(sourceCode);
-        if(extraDeps.length) {
-            deps = deps.concat(extraDeps
-            .filter(function(d){
-                return deps.indexOf(d) === -1;
-            }))
-        }
-
-        return deps;
-    }
-
-    function getExtraDeps(fnString) {
-        var extraDeps = fnString.match(/this\.(\w+)/g);
-        if(extraDeps !== null) {
-            extraDeps = extraDeps.map(function(d){
-                return d.slice(5);
-            });
-        }
-        return extraDeps || [];
-    }
-
-    function declareDep(dep) {
-        var res = resource.get(dep);
-        if(typeof res === 'undefined')
-            throw new Error('Resource/dependence "' + dep + '" is not found.');
-        if(res.resourceType == 'subroutine')
-            return toGLSL(res.type, res.name, res.fn);
-        else
-            return res.header();
-    }
-
-    function uniqueDeps(deps) {
-        var names = {};
-        deps.forEach(function(d, i){
-            names[d] = i;
-        });
-
-        return Object.keys(names);
-    }
-
-    shader.create = function(arg, fn){
-        var option = arg || {},
-            name = option.name || "default",
-            type = option.type || "vertex",
-            deps = option.require || option.deps || [],
-            precision = option.precision || "high",
-            debug = option.debug || false,
-            main = option.main || fn || function() {};
-
-        var shaderSource = 'precision ' + precision + 'p float;\n';
-
-        if(deps.length === 0) deps = uniqueDeps(getDeps(main));
-
-        //get dependence from subroutines if any
-        var extraDeps = [],
-            subRoutines = [];
-
-        deps.forEach(function(dep){
-            var res = resource.get(dep);
-            if(typeof res == 'undefined') {
-                console.log(dep);
-                throw Error ('Error! Undefined variable in shader: '+  dep.name);
-            }
-            if(res.resourceType == 'subroutine') {
-                subRoutines.push(res.name);
-                var subDeps = getExtraDeps(res.fn.toString());
-                if(subDeps.length) {
-                    //TODO: make this recursive to check all subroutine deps
-                    subDeps.forEach(function(sdep){
-                        var sres = resource.get(sdep);
-                        if(sres.resourceType == 'subroutine')
-                            extraDeps = extraDeps.concat(getExtraDeps(sres.fn.toString()));
-                    })
-
-                    extraDeps = extraDeps.concat(subDeps);
+        function addDeps(source, deps){
+            var re = /\s*(attribute|uniform)\s+\w+\s+(\w+)/;        
+            source.split('\n').forEach(function(v){
+                var result = re.exec(v);
+                if(result){
+                    deps.push(result[2]);
                 }
-            }
-        })
-
-        if(extraDeps.length) {
-            var allDeps = extraDeps
-            // .filter(function(d){
-            //     return deps.indexOf(d) === -1;
-            // })
-            .concat(deps.filter(function(d){
-                return subRoutines.indexOf(d) === -1;
-            }))
-            .concat(subRoutines);
-
-            deps = uniqueDeps(allDeps);
-        }
-
-
-        if(Array.isArray(deps)){
-            deps.forEach(function(dep){
-                shaderSource += declareDep(dep);
             });
-        } else if(typeof(deps) == 'object') {
-            Object.keys(deps).forEach(function(resourceType){
-                deps[resourceType].forEach(function(dep){
-                    shaderSource += declareDep(dep);
-                });
-            })
         }
-
-        shaderSource += toGLSL('void', 'main', main);
-        if(debug)
-            console.log(shaderSource);
-        var _shader = compile(shaderType[type], shaderSource);
-        _shader._shaderType = shaderType[type];
-        _shader.deps = deps;
-        _shader.source = shaderSource;
-        shader[type][name] = _shader;
-        return _shader;
     }
 
     return shader;
diff --git a/src/shader_expire.js b/src/shader_expire.js
new file mode 100644
index 0000000..03a1a6d
--- /dev/null
+++ b/src/shader_expire.js
@@ -0,0 +1,230 @@
+export default function Shader(glContext, glResource) {
+    
+    var shader = (this instanceof Shader) ? this : {},
+        ctx = glContext,
+        resource = glResource,
+        parameters = ctx._dict || {};
+
+    shader.vertex = {};
+    shader.fragment = {};
+
+    var shaderType = {
+        vertex: ctx.VERTEX_SHADER,
+        fragment: ctx.FRAGMENT_SHADER
+    };
+
+    // Convert JS functions to GLSL codes
+    function toGLSL(returnType, name, fn){
+
+        var glsl = returnType + ' ' +
+            name + '(' + applyEnvParameters(fn.toString())
+            .replace(
+                /var\s+([\w|\d]+)\s*=\s*new\s+([\w|\d]+)\((.*)\)/g,
+                function(expr, name, dtype, value){
+                    var parts;
+                    if(value)
+                        parts = [dtype.toLowerCase(), name, '=', value];
+                    else
+                        parts = [dtype.toLowerCase(), name];
+
+                    return parts.join(' ')
+                }
+            )
+            .replace(/for\s*\(\s*var\s+/g, 'for(int ')
+            .replace(/var\s/g, 'float ')
+            .replace(/this./g, '')
+            .replace(/\$(.*)\((.*)\)\s*(=|;)/g, "$1 $2 $3");
+            // .replace(/\$(.*?)\./g, "$1 ")
+
+        if(name == "main") {
+            glsl = glsl.replace(/function.*\(\s*([\s\S]*?)\s*{/, '){') + "\n";
+        } else {
+            var args = glsl.match(/function.*\(\s*([\s\S]*?)\s*\)/)[1];
+
+            if(args != "") {
+                args = args.replace(/\$([\w|\d]+)_/g, "$1 ");
+            }
+            glsl = glsl
+                .replace(/function.*\(\s*([\s\S]*?)\s*\)/, args+')') + "\n";
+        }
+        return glsl;
+    }
+
+    //set parameters in JS functions before converting to GLSL codes
+    function applyEnvParameters(str){
+        //find all $(...) and replace them with parameters
+        var envParam = Object.keys(parameters);
+        if(envParam.length > 0){
+            var re = new RegExp("\\$\\(("+envParam.join("|")+")\\)","g");
+            str = str.replace(re, function(matched){
+                return parameters[matched.slice(2,matched.length-1)];
+            });
+        }
+
+        // Make uniforms to be used as parameters in shaders, like $(uniformName)
+        // var envUniforms = Object.keys(resource.uniform);
+        // re = new RegExp("\\$\\(("+envUniforms.join("|")+")\\)","g");
+        // str = str.replace(re, function(matched){
+        //     return resource.uniform[matched.slice(2,matched.length-1)].data;
+        // });
+
+        return str;
+    }
+
+    function compile(shaderType, shaderSource) {
+        if (shaderType !== ctx.VERTEX_SHADER && shaderType !== ctx.FRAGMENT_SHADER) {
+            throw ("Error: unknown shader type");
+        }
+        var _shader = ctx.createShader(shaderType);
+        ctx.shaderSource(_shader, shaderSource);
+        ctx.compileShader(_shader);
+
+        // Check the compile status, get compile error if any
+        var compiled = ctx.getShaderParameter(_shader, ctx.COMPILE_STATUS);
+        if (!compiled) {
+            var lastError = ctx.getShaderInfoLog(_shader);
+            console.log(shaderSource + '\n ====================================================');
+            throw new Error("Error compiling shader '" + _shader + "':" + lastError);
+
+            ctx.deleteShader(_shader);
+            return null;
+        }
+
+        return _shader;
+    }
+
+    function getDeps(fn) {
+        var deps = [],
+            sourceCode = fn.toString(),
+            shaderArgs = sourceCode.match(/function\s.*?\(([^)]*)\)/),
+            args = (shaderArgs !== null && shaderArgs.length) ? shaderArgs[1] : [];
+        // args = args.replace(/(?:\r\n|\r|\n|\s)/g, '');
+        //
+        if(args.length) {
+            deps = args.split(',').map(function(arg) {
+                return arg.replace(/\/\*.*\*\//, '').trim();
+            }).filter(function(arg) {
+                return arg;
+            });
+        }
+
+        var extraDeps = getExtraDeps(sourceCode);
+        if(extraDeps.length) {
+            deps = deps.concat(extraDeps
+            .filter(function(d){
+                return deps.indexOf(d) === -1;
+            }))
+        }
+
+        return deps;
+    }
+
+    function getExtraDeps(fnString) {
+        var extraDeps = fnString.match(/this\.(\w+)/g);
+        if(extraDeps !== null) {
+            extraDeps = extraDeps.map(function(d){
+                return d.slice(5);
+            });
+        }
+        return extraDeps || [];
+    }
+
+    function declareDep(dep) {
+        var res = resource.get(dep);
+        if(typeof res === 'undefined')
+            throw new Error('Resource/dependence "' + dep + '" is not found.');
+        if(res.resourceType == 'subroutine')
+            return toGLSL(res.type, res.name, res.fn);
+        else
+            return res.header();
+    }
+
+    function uniqueDeps(deps) {
+        var names = {};
+        deps.forEach(function(d, i){
+            names[d] = i;
+        });
+
+        return Object.keys(names);
+    }
+
+    shader.create = function(arg, fn){
+        var option = arg || {},
+            name = option.name || "default",
+            type = option.type || "vertex",
+            deps = option.require || option.deps || [],
+            precision = option.precision || "high",
+            debug = option.debug || false,
+            main = option.main || fn || function() {};
+
+        var shaderSource = 'precision ' + precision + 'p float;\n';
+
+        if(deps.length === 0) deps = uniqueDeps(getDeps(main));
+
+        //get dependence from subroutines if any
+        var extraDeps = [],
+            subRoutines = [];
+
+        deps.forEach(function(dep){
+            var res = resource.get(dep);
+            if(typeof res == 'undefined') {
+                console.log(dep);
+                throw Error ('Error! Undefined variable in shader: '+  dep.name);
+            }
+            if(res.resourceType == 'subroutine') {
+                subRoutines.push(res.name);
+                var subDeps = getExtraDeps(res.fn.toString());
+                if(subDeps.length) {
+                    //TODO: make this recursive to check all subroutine deps
+                    subDeps.forEach(function(sdep){
+                        var sres = resource.get(sdep);
+                        if(sres.resourceType == 'subroutine')
+                            extraDeps = extraDeps.concat(getExtraDeps(sres.fn.toString()));
+                    })
+
+                    extraDeps = extraDeps.concat(subDeps);
+                }
+            }
+        })
+
+        if(extraDeps.length) {
+            var allDeps = extraDeps
+            // .filter(function(d){
+            //     return deps.indexOf(d) === -1;
+            // })
+            .concat(deps.filter(function(d){
+                return subRoutines.indexOf(d) === -1;
+            }))
+            .concat(subRoutines);
+
+            deps = uniqueDeps(allDeps);
+        }
+
+
+        if(Array.isArray(deps)){
+            deps.forEach(function(dep){
+                shaderSource += declareDep(dep);
+            });
+        } else if(typeof(deps) == 'object') {
+            Object.keys(deps).forEach(function(resourceType){
+                deps[resourceType].forEach(function(dep){
+                    shaderSource += declareDep(dep);
+                });
+            })
+        }
+
+        shaderSource += toGLSL('void', 'main', main);
+
+        if(debug)
+            console.log(shaderSource);
+
+        var _shader = compile(shaderType[type], shaderSource);
+        _shader._shaderType = shaderType[type];
+        _shader.deps = deps;
+        _shader.source = shaderSource;
+        shader[type][name] = _shader;
+        return _shader;
+    }
+
+    return shader;
+}
diff --git a/src/texture.js b/src/texture.js
index dc9fc92..5c3f245 100644
--- a/src/texture.js
+++ b/src/texture.js
@@ -6,7 +6,8 @@ export default function Texture(glContext) {
         ctx = glContext,
         textureID = 0;
 
-    function setTexture(name, texData) {
+    function setTexture(name, texData) 
+    {
         var type = ctx[texture[name].type.toUpperCase()],
             format = ctx[texture[name].channel.toUpperCase()],
             width = texture[name].dim[0],
@@ -72,7 +73,7 @@ export default function Texture(glContext) {
         }
 
         texture[name].link = function(program) {
-            if (this.data !== null) {
+            // if (this.data !== null) {
                 // ctx.activeTexture(ctx.TEXTURE0 + this.index);
                 // ctx.bindTexture(ctx.TEXTURE_2D, this.ptr);
                 // this.location = ctx.getUniformLocation(program, this.name);
@@ -81,7 +82,9 @@ export default function Texture(glContext) {
                     this.sampler.data = texture[name];
 
                 this.sampler.link(program);
-            }
+            // }else{
+            //     console.log('texture data is null!!!')
+            // }
             return this;
         }
 
@@ -109,7 +112,7 @@ export default function Texture(glContext) {
             updateTexture(this.name, texData, offset, dim);
             return this;
         }
-
+        
         texture[name].resize = function(dim, data) {
             this.dim = dim;
             setTexture(this.name, data);
diff --git a/src/uniform.js b/src/uniform.js
index c2803b2..9afa972 100644
--- a/src/uniform.js
+++ b/src/uniform.js
@@ -38,6 +38,7 @@ export default function Uniform(glContext, name, type, data) {
             ctx['uniformMatrix' + size + 'fv'](location, false, buf);
         } else if(type == 'sampler2D') {
             if(data.hasOwnProperty('resourceType') && data.resourceType == 'texture') {
+                // console.log('bind ' + data.index);
                 ctx.activeTexture(ctx.TEXTURE0 + data.index);
                 ctx.bindTexture(ctx.TEXTURE_2D, data.ptr);
                 ctx.uniform1i(location, data.index);