1 files changed, 48 insertions, 0 deletions
diff --git a/tests/test_browser.py b/tests/test_browser.py
index 000dd95a..28a6f139 100644
--- a/tests/test_browser.py
+++ b/tests/test_browser.py
@@ -869,6 +869,54 @@ keydown(100);keyup(100); // trigger the end
   def test_glut_wheelevents(self):
     self.btest('glut_wheelevents.c', '1')
 
+  def test_webgl_context_attributes(self):
+    # Javascript code to check the attributes support we want to test in the WebGL implementation 
+    # (request the attribute, create a context and check its value afterwards in the context attributes).
+    # Tests will succeed when an attribute is not supported.
+    open(os.path.join(self.get_dir(), 'check_webgl_attributes_support.js'), 'w').write('''
+      mergeInto(LibraryManager.library, {
+        webglAntialiasSupported: function() {
+          canvas = document.createElement('canvas');
+          context = canvas.getContext('experimental-webgl', {antialias: true});
+          attributes = context.getContextAttributes();
+          return attributes.antialias;
+        }
+      });
+
+      mergeInto(LibraryManager.library, {
+        webglDepthSupported: function() {
+          canvas = document.createElement('canvas');
+          context = canvas.getContext('experimental-webgl', {depth: true});
+          attributes = context.getContextAttributes();
+          return attributes.depth;
+        }
+      });
+
+      mergeInto(LibraryManager.library, {
+        webglStencilSupported: function() {
+          canvas = document.createElement('canvas');
+          context = canvas.getContext('experimental-webgl', {stencil: true});
+          attributes = context.getContextAttributes();
+          return attributes.stencil;
+       }
+      });
+    ''')
+    
+    # Copy common code file to temporary directory
+    filepath = path_from_root('tests/test_webgl_context_attributes_common.c')
+    temp_filepath = os.path.join(self.get_dir(), os.path.basename(filepath))
+    shutil.copyfile(filepath, temp_filepath)
+    
+    # perform tests with attributes activated 
+    self.btest('test_webgl_context_attributes_glut.c', '1', args=['--js-library', 'check_webgl_attributes_support.js', '-DAA_ACTIVATED', '-DDEPTH_ACTIVATED', '-DSTENCIL_ACTIVATED'])
+    self.btest('test_webgl_context_attributes_sdl.c', '1', args=['--js-library', 'check_webgl_attributes_support.js', '-DAA_ACTIVATED', '-DDEPTH_ACTIVATED', '-DSTENCIL_ACTIVATED'])
+    self.btest('test_webgl_context_attributes_glfw.c', '1', args=['--js-library', 'check_webgl_attributes_support.js', '-DAA_ACTIVATED', '-DDEPTH_ACTIVATED', '-DSTENCIL_ACTIVATED'])
+    
+    # perform tests with attributes desactivated
+    self.btest('test_webgl_context_attributes_glut.c', '1', args=['--js-library', 'check_webgl_attributes_support.js'])
+    self.btest('test_webgl_context_attributes_sdl.c', '1', args=['--js-library', 'check_webgl_attributes_support.js'])
+    self.btest('test_webgl_context_attributes_glfw.c', '1', args=['--js-library', 'check_webgl_attributes_support.js'])
+    
   def test_emscripten_get_now(self):
     self.btest('emscripten_get_now.cpp', '1')