glGetString

2 files changed, 16 insertions, 5 deletions

diff --git a/src/library_gl.js b/src/library_gl.js
index a20611c9..f69d3301 100644
--- a/src/library_gl.js
+++ b/src/library_gl.js
@@ -1,8 +1,19 @@
 mergeInto(Library, {
-  glGetString: function() {},
+  glGetString: function(name_) {
+    switch(name_) {
+      case Module.contextGL.VENDOR:
+      case Module.contextGL.RENDERER:
+      case Module.contextGL.VERSION:
+        return Pointer_make(intArrayFromString(Module.contextGL.getParameter(name_)), null, ALLOC_NORMAL);
+      case 0x1F03: // Extensions
+        return Pointer_make(intArrayFromString(Module.contextGL.getSupportedExtensions().join(' ')), null, ALLOC_NORMAL);
+      default:
+        throw 'Failure: Invalid glGetString value: ' + name_;
+    }
+  }
 
-  glGenVertexArrays: function() {},
+//  glGenVertexArrays: function() {},
 
-  glBindVertexArray: function() {},
+//  glBindVertexArray: function() {},
 });
 
diff --git a/src/library_sdl.js b/src/library_sdl.js
index 525a04d2..310ff68c 100644
--- a/src/library_sdl.js
+++ b/src/library_sdl.js
@@ -1,5 +1,5 @@
 // To use emscripten's SDL library here, you need to define
-// Module.canvas and Module.context.
+// Module.canvas and at least one of Module.context2D, Module.contextGL.
 
 mergeInto(Library, {
   SDL_INFO: {
@@ -40,7 +40,7 @@ mergeInto(Library, {
       width: width,
       height: height,
       canvas: Module.canvas,
-      context: Module.context,
+      context: Module.context2D,
       surf: surf,
       buffer: _malloc(width*height*4)
     };