vislite/lib/Buffer/index.es.js

灵活、快速、简单的数据可视化交互式跨端前端库

/*!
* Buffer of VISLite JavaScript Library v1.3.0
* git+https://github.com/oi-contrib/VISLite.git
*/
var newBuffer = function (painter) {
    return painter.createBuffer();
};
var writeBuffer = function (painter, data, isElement, usage) {
    var TYPE = isElement ? painter.ELEMENT_ARRAY_BUFFER : painter.ARRAY_BUFFER;
    painter.bufferData(TYPE, data, usage);
};
var useBuffer = function (painter, location, size, type, stride, offset, normalized) {
    painter.vertexAttribPointer(location, size, type, normalized, stride, offset);
    painter.enableVertexAttribArray(location);
};
var BufferObject = (function () {
    function BufferObject(painter, isElement) {
        if (isElement === void 0) { isElement = false; }
        this.__painter = painter;
        this.__isElement = isElement;
        this.__buffer = newBuffer(painter);
        this.__type = isElement ? painter.ELEMENT_ARRAY_BUFFER : painter.ARRAY_BUFFER;
    }
    BufferObject.prototype.use = function () {
        this.__painter.bindBuffer(this.__type, this.__buffer);
        return this;
    };
    BufferObject.prototype.write = function (data) {
        writeBuffer(this.__painter, data, this.__isElement, this.__painter.STATIC_DRAW);
        this.__fsize = data.BYTES_PER_ELEMENT;
        return this;
    };
    BufferObject.prototype.divide = function (location, size, stride, offset) {
        if (offset === void 0) { offset = 0; }
        useBuffer(this.__painter, location, size, this.__painter.FLOAT, stride * this.__fsize, offset * this.__fsize, false);
        return this;
    };
    return BufferObject;
}());

export { BufferObject as default };