From 66bdbc3b969083b9d647abdf72784be64a125949 Mon Sep 17 00:00:00 2001
From: John Firebaugh <john.firebaugh@gmail.com>
Date: Fri, 28 Oct 2016 18:17:33 -0700
Subject: [core] Introduce gl::Program template

---
 scripts/build-shaders.js | 86 ++++++++++++++++++++----------------------------
 1 file changed, 36 insertions(+), 50 deletions(-)

(limited to 'scripts')

diff --git a/scripts/build-shaders.js b/scripts/build-shaders.js
index 9090f19e6d..dd2de9daf6 100755
--- a/scripts/build-shaders.js
+++ b/scripts/build-shaders.js
@@ -4,68 +4,54 @@ var path = require('path');
 var fs = require('fs');
 var mkdirp = require('mkdirp');
 
-var input_file = process.argv[2]
-var output_file = process.argv[3];
+var vertex_file = process.argv[2];
+var fragment_file = process.argv[3];
+var output_file = process.argv[4];
 
-if (!input_file || !output_file) {
+if (!vertex_file || !fragment_file || !output_file) {
     console.warn('No input or output file given.');
-    console.warn('Usage: %s [input.vertex.glsl] [output.vertex.hpp]', path.basename(process.argv[1]));
+    console.warn('Usage: %s input.vertex.glsl input.fragment.glsl output.hpp', path.basename(process.argv[1]));
     process.exit(1);
 }
 
-var components = path.basename(input_file).split('.');
-
+var components = path.basename(vertex_file).split('.');
 var shader_name = components[0];
-var shader_type = components[1];
-var extension = components[2];
-
-var data = fs.readFileSync(input_file, 'utf8');
-
-// Replace uniform pragmas
 
 var pragma_mapbox_regex = /(\s*)#pragma\s+mapbox\s*:\s+(define|initialize)\s+(low|medium|high)p\s+(float|vec(?:2|3|4))\s+(.*)/;
 
-var data = data.split('\n').map(function(line) {
-    var params = line.match(pragma_mapbox_regex);
-    if (params) {
-        if (params[2] === 'define') {
-            return params[1] + 'uniform ' + params[3] + 'p ' + params[4] + ' u_' + params[5] + ';';
+function source(file) {
+    return '\n' + fs.readFileSync(file, 'utf8').split('\n').map(function(line) {
+        var params = line.match(pragma_mapbox_regex);
+        if (params) {
+            if (params[2] === 'define') {
+                return params[1] + 'uniform ' + params[3] + 'p ' + params[4] + ' u_' + params[5] + ';';
+            } else {
+                return params[1] + params[3] + 'p ' + params[4] + ' ' + params[5] + ' = u_' + params[5] + ';';
+            }
         } else {
-            return params[1] + params[3] + 'p ' + params[4] + ' ' + params[5] + ' = u_' + params[5] + ';';
+            return line;
         }
-    } else {
-        return line;
-    }
-}).join('\n');
-
+    }).join('\n');
+}
 
-var content =
-    '#pragma once\n' +
-    '\n' +
-    '// NOTE: DO NOT CHANGE THIS FILE. IT IS AUTOMATICALLY GENERATED.\n' +
-    '\n' +
-    '#include <mbgl/gl/gl.hpp>\n' +
-    '\n' +
-    'namespace mbgl {\n' +
-    'namespace shaders {\n' +
-    'namespace ' + shader_name + ' {\n' +
-    '\n' +
-    '#ifndef MBGL_SHADER_NAME_' + shader_name.toUpperCase() + '\n' +
-    '#define MBGL_SHADER_NAME_' + shader_name.toUpperCase() + '\n' +
-    'constexpr const char* name = "' + shader_name + '";\n' +
-    '#endif // MBGL_SHADER_NAME_' + shader_name.toUpperCase() + '\n' +
-    '\n' +
-    'constexpr const char* ' + shader_type + ' =\n' +
-    '#ifdef GL_ES_VERSION_2_0\n' +
-    '    "precision highp float;"\n' +
-    '#else\n' +
-    '    "#version 120"\n' +
-    '#endif\n' +
-    '    R"MBGL_SHADER(\n' + data + ')MBGL_SHADER";\n' +
-    '\n' +
-    '} // namespace ' + shader_name + '\n' +
-    '} // namespace shaders\n' +
-    '} // namespace mbgl\n';
+var content = "#pragma once\n" +
+"\n" +
+"// NOTE: DO NOT CHANGE THIS FILE. IT IS AUTOMATICALLY GENERATED.\n" +
+"\n" +
+"#include <mbgl/gl/gl.hpp>\n" +
+"\n" +
+"namespace mbgl {\n" +
+"namespace shaders {\n" +
+"\n" +
+"class " + shader_name + " {\n" +
+"public:\n" +
+"    static constexpr const char* name = \"" + shader_name + "\";" +
+"    static constexpr const char* vertexSource = R\"MBGL_SHADER(" + source(vertex_file) + ")MBGL_SHADER\";\n" +
+"    static constexpr const char* fragmentSource = R\"MBGL_SHADER(" + source(fragment_file) + ")MBGL_SHADER\";\n" +
+"};\n" +
+"\n" +
+"} // namespace shaders\n" +
+"} // namespace mbgl\n";
 
 mkdirp.sync(path.dirname(output_file));
 fs.writeFileSync(output_file, content);
-- 
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