molstar
Version:
A comprehensive macromolecular library.
45 lines • 1.61 kB
JavaScript
/**
* Copyright (c) 2018-2020 mol* contributors, licensed under MIT, See LICENSE file for more info.
*
* @author Alexander Rose <alexander.rose@weirdbyte.de>
*/
import { idFactory } from '../../mol-util/id-factory';
import { isDebugMode } from '../../mol-util/debug';
var getNextShaderId = idFactory();
function addLineNumbers(source) {
var lines = source.split('\n');
for (var i = 0; i < lines.length; ++i) {
lines[i] = (i + 1) + ': ' + lines[i];
}
return lines.join('\n');
}
export function getShader(gl, props) {
var type = props.type, source = props.source;
var shader = gl.createShader(type === 'vert' ? gl.VERTEX_SHADER : gl.FRAGMENT_SHADER);
if (shader === null) {
throw new Error("Error creating " + type + " shader");
}
gl.shaderSource(shader, source);
gl.compileShader(shader);
if (isDebugMode && gl.getShaderParameter(shader, gl.COMPILE_STATUS) === false) {
console.warn("'" + type + "' shader info log '" + gl.getShaderInfoLog(shader) + "'\n" + addLineNumbers(source));
throw new Error("Error compiling " + type + " shader");
}
return shader;
}
export function createShader(gl, props) {
var shader = getShader(gl, props);
return {
id: getNextShaderId(),
attach: function (program) {
gl.attachShader(program, shader);
},
reset: function () {
shader = getShader(gl, props);
},
destroy: function () {
gl.deleteShader(shader);
}
};
}
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