vislite/lib/Shader/index.es.js

灵活、快速、简单的数据可视化交互式跨端前端库

/*!
* Shader of VISLite JavaScript Library v1.3.0
* git+https://github.com/oi-contrib/VISLite.git
*/
var loadShader = function (painter, type, source) {
    var shader = painter.createShader(type);
    if (shader == null)
        throw new Error('Unable to create shader!');
    painter.shaderSource(shader, source);
    painter.compileShader(shader);
    if (!painter.getShaderParameter(shader, painter.COMPILE_STATUS))
        throw new Error('Failed to compile shader:' + painter.getShaderInfoLog(shader));
    return shader;
};
var useShader = function (painter, vshaderSource, fshaderSource) {
    var vertexShader = loadShader(painter, painter.VERTEX_SHADER, vshaderSource);
    var fragmentShader = loadShader(painter, painter.FRAGMENT_SHADER, fshaderSource);
    var glProgram = painter.createProgram();
    painter.attachShader(glProgram, vertexShader);
    painter.attachShader(glProgram, fragmentShader);
    painter.linkProgram(glProgram);
    if (!painter.getProgramParameter(glProgram, painter.LINK_STATUS))
        throw new Error('Failed to link program: ' + painter.getProgramInfoLog(glProgram));
    return glProgram;
};
var ShaderObject = (function () {
    function ShaderObject(painter) {
        this.__painter = painter;
    }
    ShaderObject.prototype.use = function () {
        this.__painter.useProgram(this.program);
        return this;
    };
    ShaderObject.prototype.compile = function (vshaderSource, fshaderSource) {
        this.program = useShader(this.__painter, vshaderSource, fshaderSource);
        return this;
    };
    return ShaderObject;
}());

export { ShaderObject as default };