remove dependency on node

1 files changed, 104 insertions, 0 deletions

diff --git a/scripts/build-shaders.py b/scripts/build-shaders.py
new file mode 100644
index 0000000000..c1d7f7f28d
--- /dev/null
+++ b/scripts/build-shaders.py
@@ -0,0 +1,104 @@
+#!/usr/bin/env python
+
+import sys, re, os, errno
+
+
+output_dir = sys.argv[1]
+file_names = sys.argv[2:]
+
+
+def mkdir_p(path):
+    try:
+        os.makedirs(path)
+    except OSError as exc: # Python >2.5
+        if exc.errno == errno.EEXIST and os.path.isdir(path):
+            pass
+        else: raise
+
+# Load all shaders
+shaders = {}
+for file_name in file_names:
+    parts = re.search('/(\w+)\.(vertex|fragment)\.glsl$', file_name)
+    if parts:
+        shader_name = parts.group(1)
+        shader_type = parts.group(2)
+        if not shader_name in shaders:
+            shaders[shader_name] = {}
+        with open(file_name, "r") as f:
+            shaders[shader_name][shader_type] = f.read()
+
+
+def write_header():
+    header = """// NOTE: DO NOT CHANGE THIS FILE. IT IS AUTOMATICALLY GENERATED.
+
+#ifndef MBGL_SHADER_SHADERS
+#define MBGL_SHADER_SHADERS
+
+namespace mbgl {
+
+struct shader_source {
+    const char *vertex;
+    const char *fragment;
+};
+
+enum {
+%s
+    SHADER_COUNT
+};
+
+extern const shader_source shaders[SHADER_COUNT];
+
+}
+
+#endif
+""" % '\n'.join(['    %s_SHADER,' % name.upper() for name in shaders.keys()])
+    header_path = os.path.join(output_dir, 'include/mbgl/shader/shaders.hpp')
+    mkdir_p(os.path.dirname(header_path))
+    with open(header_path, 'w') as f: f.write(header)
+
+
+def write_source(shader_platform, prefix, suffix):
+    if shader_platform == 'gles2' or shader_platform == 'gles3':
+        # OpenGL ES
+        preamble = 'precision highp float;';
+    else:
+        # Desktop OpenGL
+        preamble = '#version 120';
+
+    shader_lines = [("""    {{
+        R"{name}_vert({preamble}\n{vertex}){name}_vert",
+        R"{name}_frag({preamble}\n{fragment}){name}_frag",
+    }},
+""").format(
+    name = shader,
+    preamble = preamble,
+    vertex = shaders[shader]['vertex'],
+    fragment = shaders[shader]['fragment']
+) for shader in shaders]
+
+    source = """// NOTE: DO NOT CHANGE THIS FILE. IT IS AUTOMATICALLY GENERATED.
+#include <mbgl/platform/gl.hpp>
+{prefix}
+#include <mbgl/shader/shaders.hpp>
+
+namespace mbgl {{
+
+const shader_source shaders[SHADER_COUNT] = {{
+{shaders}
+}};
+
+}}
+{suffix}
+""".format(
+    prefix = prefix,
+    suffix = suffix,
+    shaders = ''.join(shader_lines)
+)
+
+    source_path = os.path.join(output_dir, 'src/shader/shaders_' + shader_platform + '.cpp')
+    mkdir_p(os.path.dirname(source_path))
+    with open(source_path, 'w') as f: f.write(source)
+
+write_header()
+write_source('gl', '#ifndef GL_ES_VERSION_2_0', '#endif')
+write_source('gles2', '#ifdef GL_ES_VERSION_2_0', '#endif')