| 1 | import { GLProgram } from '../GLProgram.mjs';
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| 2 | import { compileShader } from './compileShader.mjs';
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| 3 | import { defaultValue } from './defaultValue.mjs';
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| 4 | import { getAttributeData } from './getAttributeData.mjs';
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| 5 | import { getUniformData } from './getUniformData.mjs';
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| 6 | import { logProgramError } from './logProgramError.mjs';
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| 7 |
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| 8 | function generateProgram(gl, program) {
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| 9 | const glVertShader = compileShader(gl, gl.VERTEX_SHADER, program.vertexSrc);
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| 10 | const glFragShader = compileShader(gl, gl.FRAGMENT_SHADER, program.fragmentSrc);
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| 11 | const webGLProgram = gl.createProgram();
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| 12 | gl.attachShader(webGLProgram, glVertShader);
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| 13 | gl.attachShader(webGLProgram, glFragShader);
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| 14 | const transformFeedbackVaryings = program.extra?.transformFeedbackVaryings;
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| 15 | if (transformFeedbackVaryings) {
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| 16 | if (typeof gl.transformFeedbackVaryings !== "function") {
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| 17 | console.warn(`TransformFeedback is not supported but TransformFeedbackVaryings are given.`);
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| 18 | } else {
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| 19 | gl.transformFeedbackVaryings(webGLProgram, transformFeedbackVaryings.names, transformFeedbackVaryings.bufferMode === "separate" ? gl.SEPARATE_ATTRIBS : gl.INTERLEAVED_ATTRIBS);
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| 20 | }
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| 21 | }
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| 22 | gl.linkProgram(webGLProgram);
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| 23 | if (!gl.getProgramParameter(webGLProgram, gl.LINK_STATUS)) {
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| 24 | logProgramError(gl, webGLProgram, glVertShader, glFragShader);
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| 25 | }
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| 26 | program.attributeData = getAttributeData(webGLProgram, gl);
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| 27 | program.uniformData = getUniformData(webGLProgram, gl);
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| 28 | if (!/^[ \t]*#[ \t]*version[ \t]+300[ \t]+es[ \t]*$/m.test(program.vertexSrc)) {
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| 29 | const keys = Object.keys(program.attributeData);
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| 30 | keys.sort((a, b) => a > b ? 1 : -1);
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| 31 | for (let i = 0; i < keys.length; i++) {
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| 32 | program.attributeData[keys[i]].location = i;
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| 33 | gl.bindAttribLocation(webGLProgram, i, keys[i]);
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| 34 | }
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| 35 | gl.linkProgram(webGLProgram);
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| 36 | }
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| 37 | gl.deleteShader(glVertShader);
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| 38 | gl.deleteShader(glFragShader);
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| 39 | const uniformData = {};
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| 40 | for (const i in program.uniformData) {
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| 41 | const data = program.uniformData[i];
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| 42 | uniformData[i] = {
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| 43 | location: gl.getUniformLocation(webGLProgram, i),
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| 44 | value: defaultValue(data.type, data.size)
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| 45 | };
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| 46 | }
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| 47 | const glProgram = new GLProgram(webGLProgram, uniformData);
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| 48 | return glProgram;
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| 49 | }
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| 50 |
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| 51 | export { generateProgram };
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| 52 |
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