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Replace pyglslunit.py with a JavaScript rewrite
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| const fs = require('fs'); | ||
|
|
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| const ESCAPE_SEQUENCE = { | ||
| '\\': '\\\\', | ||
| '\n': '\\n', | ||
| '\t': '\\t' | ||
| }; | ||
|
|
||
| function js_escape(s) { | ||
| return s.split('').map(function(c) { | ||
| return ESCAPE_SEQUENCE[c] || c; | ||
| }).join(''); | ||
| } | ||
|
|
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| function glsl_compress(s, shortNames) { | ||
| // strip leading whitespace | ||
| s = s.replace(/^\s+/g, ''); | ||
| // strip trailing whitespace | ||
| s = s.replace(/\s+$/g, ''); | ||
| // strip multi-line comments | ||
| s = s.replace(/\/\*[\s\S]*?\*\//g, ''); | ||
| // strip single line comments | ||
| s = s.replace(/\/\/.*?\n/, ''); | ||
| // replace multiple whitespace with a single space | ||
| s = s.replace(/\s+/g, ' '); | ||
| // remove whitespace between non-word tokens | ||
| s = s.replace(/(\S)\s+([^\w])/g, '$1$2') | ||
| .replace(/([^\w])\s+(\S)/g, '$1$2'); | ||
| // replace original names with short names | ||
| for (var originalName in shortNames) { | ||
| s = s.replace(new RegExp(originalName, 'gm'), shortNames[originalName]); | ||
| } | ||
| return s; | ||
| } | ||
|
|
||
| function main(argv) { | ||
| var options = {}; | ||
| for (var i = 2, ii = argv.length; i < ii; i += 2) { | ||
| options[argv[i].replace(/^../, '')] = argv[i + 1]; | ||
| } | ||
| if (!options.input) { | ||
| process.stdout.write('--input option missing\n'); | ||
| return 1; | ||
| } | ||
|
|
||
| const json = {}; | ||
| let nextShortName = 'a'.charCodeAt(0); | ||
| const shortNames = {}; | ||
|
|
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| const attributes = {}; | ||
| const uniforms = {}; | ||
| const varyings = {}; | ||
| const blocks = { | ||
| common: '', | ||
| vertex: '', | ||
| fragment: '' | ||
| }; | ||
| let block = undefined; | ||
| const inFile = fs.readFileSync(options.input, 'utf-8'); | ||
| const lines = inFile.split('\n'); | ||
|
|
||
| let m, shortName; | ||
| lines.forEach(function(line, i) { | ||
| if (line.indexOf('//!') == 0) { | ||
| m = line.match(/\/\/!\s+NAMESPACE=(\S+)\s*$/); | ||
| if (m) { | ||
| json.namespace = m[1]; | ||
| return; | ||
| } | ||
| m = line.match(/\/\/!\s+COMMON\s*$/); | ||
| if (m) { | ||
| block = 'common'; | ||
| return; | ||
| } | ||
| m = line.match(/\/\/!\s+VERTEX\s*$/); | ||
| if (m) { | ||
| block = 'vertex'; | ||
| return; | ||
| } | ||
| m = line.match(/\/\/!\s+FRAGMENT\s*$/); | ||
| if (m) { | ||
| block = 'fragment'; | ||
| return; | ||
| } | ||
| } else { | ||
| if (block === undefined) { | ||
| if (line.replace(/\s+$/g, '') != '') { | ||
| process.stdout.write(`Error parsing ${options.input}\n`); | ||
| return; | ||
| } | ||
| } else { | ||
| blocks[block] += line + (i == lines.length - 1 ? '' : '\n'); | ||
| } | ||
| m = line.match(/attribute\s+\S+\s+(\S+);\s*$/); | ||
| if (m) { | ||
| const attribute = m[1]; | ||
| if (!(attribute in attributes)) { | ||
| shortName = String.fromCharCode(nextShortName++); | ||
| attributes[attribute] = { | ||
| originalName: attribute, | ||
| shortName: shortName | ||
| }; | ||
| shortNames[attribute] = shortName; | ||
| } | ||
| } | ||
| m = line.match(/uniform\s+\S+\s+(\S+);\s*$/); | ||
| if (m) { | ||
| const uniform = m[1]; | ||
| if (!(uniform in uniforms)) { | ||
| shortName = String.fromCharCode(nextShortName++); | ||
| uniforms[uniform] = { | ||
| originalName: uniform, | ||
| shortName: shortName | ||
| }; | ||
| shortNames[uniform] = shortName; | ||
| } | ||
| } | ||
| m = line.match(/varying\s+\S+\s+(\S+);\s*$/); | ||
| if (m) { | ||
| const varying = m[1]; | ||
| if (!(varying in varyings)) { | ||
| shortName = String.fromCharCode(nextShortName++); | ||
| shortNames[varying] = shortName; | ||
| } | ||
| } | ||
| } | ||
| }); | ||
|
|
||
| json.originalFragmentSource = js_escape(blocks.common + blocks.fragment); | ||
| json.originalVertexSource = js_escape(blocks.common + blocks.vertex); | ||
| json.fragmentSource = glsl_compress(blocks.common + blocks.fragment, shortNames); | ||
| json.vertexSource = glsl_compress(blocks.common + blocks.vertex, shortNames); | ||
| json.attributes = Object.keys(attributes).map(a => attributes[a]); | ||
| json.uniforms = Object.keys(uniforms).map(u => uniforms[u]); | ||
|
|
||
| if (options.output && options.output != '-') { | ||
| fs.writeFileSync(options.output, JSON.stringify(json)); | ||
| } else { | ||
| process.stdout.write(JSON.stringify(json)); | ||
| } | ||
| return 0; | ||
| } | ||
|
|
||
| if (require.main === module) { | ||
| process.exit(main(process.argv)); | ||
| } |