Fixes GLFW_CONTEXT_VERSION_MAJOR ignored (#14)

Automatically set the MAX_WEBGL_VERSION when compiling with the port so that users don't have to worry about it

Author: ypujante

port/emscripten-glfw3.py

@@ -103,6 +103,7 @@ def linker_setup(ports, settings):
   root_path = os.path.join(ports.get_dir(), port_name)
   source_js_path = os.path.join(root_path, 'src', 'js', 'lib_emscripten_glfw3.js')
   settings.JS_LIBRARIES += [source_js_path]
+  settings.MAX_WEBGL_VERSION = 2 # for GLFW_CONTEXT_VERSION_MAJOR to work
 
 
 # Using contrib.glfw3 to avoid installing headers into top level include path

test/demo/CMakeLists.txt

@@ -4,6 +4,9 @@ project(emscripten_glfw_demo LANGUAGES CXX)
 
 set(target "demo")
 
+# the linker flag -sMAX_WEBGL_VERSION=2 is used because due to Emscripten internals,
+# the GLFW_CONTEXT_VERSION_MAJOR is ignored. When using the port, the flag is
+# automatically set so there is no need to set it.
 set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -sMAX_WEBGL_VERSION=2 -sNO_DISABLE_EXCEPTION_CATCHING -s ASSERTIONS=1 -s WASM=1 -s SAFE_HEAP=1")
 
 add_executable(${target} src/main.cpp src/Triangle.cpp)