61 lines
2.2 KiB
JavaScript
Executable File
61 lines
2.2 KiB
JavaScript
Executable File
#!/usr/bin/env node
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var path = require('path');
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var fs = require('fs');
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var mkdirp = require('mkdirp');
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var shaderName = process.argv[2];
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var inputPath = process.argv[3];
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var outputPath = process.argv[4];
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if (!shaderName || !inputPath || !outputPath) {
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console.warn('Not enough arguments.');
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console.warn('Usage: %s shaderName /path-to-shader-sources /output-path', path.basename(process.argv[1]));
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process.exit(1);
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}
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var pragmaMapboxRe = /(\s*)#pragma\s+mapbox\s*:\s+(define|initialize)\s+(low|medium|high)p\s+(float|vec(?:2|3|4))\s+(.*)/;
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function applyPragmas(source) {
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return '\n' + source.split('\n').map(function(line) {
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var params = line.match(pragmaMapboxRe);
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if (params) {
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if (params[2] === 'define') {
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return params[1] + 'uniform ' + params[3] + 'p ' + params[4] + ' u_' + params[5] + ';';
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} else {
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return params[1] + params[3] + 'p ' + params[4] + ' ' + params[5] + ' = u_' + params[5] + ';';
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}
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} else {
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return line;
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}
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}).join('\n');
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}
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var vertexPrelude = fs.readFileSync(path.join(inputPath, '_prelude.vertex.glsl'));
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var fragmentPrelude = fs.readFileSync(path.join(inputPath, '_prelude.fragment.glsl'));
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var vertexSource = vertexPrelude + fs.readFileSync(path.join(inputPath, shaderName + '.vertex.glsl'), 'utf8');
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var fragmentSource = fragmentPrelude + fs.readFileSync(path.join(inputPath, shaderName + '.fragment.glsl'), 'utf8');
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var content = "#pragma once\n" +
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"\n" +
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"// NOTE: DO NOT CHANGE THIS FILE. IT IS AUTOMATICALLY GENERATED.\n" +
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"\n" +
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"#include <mbgl/gl/gl.hpp>\n" +
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"\n" +
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"namespace mbgl {\n" +
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"namespace shaders {\n" +
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"\n" +
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"class " + shaderName + " {\n" +
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"public:\n" +
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" static constexpr const char* name = \"" + shaderName + "\";\n" +
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" static constexpr const char* vertexSource = R\"MBGL_SHADER(" + applyPragmas(vertexSource) + ")MBGL_SHADER\";\n" +
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" static constexpr const char* fragmentSource = R\"MBGL_SHADER(" + applyPragmas(fragmentSource) + ")MBGL_SHADER\";\n" +
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"};\n" +
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"\n" +
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"} // namespace shaders\n" +
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"} // namespace mbgl\n";
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mkdirp.sync(outputPath);
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fs.writeFileSync(path.join(outputPath, shaderName + '.hpp'), content);
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