Merge remote-tracking branch 'origin/5.14' into 5.15

 Conflicts:
	src/corelib/serialization/qcborvalue.cpp

Change-Id: I675a3029955c96e81a33ed9d98b72b55b6784b52

2 files changed, 8 insertions, 6 deletions

diff --git a/src/gui/opengl/qopenglframebufferobject.cpp b/src/gui/opengl/qopenglframebufferobject.cpp
index 5d30891565..bb0dbdc9bd 100644
--- a/src/gui/opengl/qopenglframebufferobject.cpp
+++ b/src/gui/opengl/qopenglframebufferobject.cpp
@@ -658,13 +658,11 @@ void QOpenGLFramebufferObjectPrivate::initDepthStencilAttachments(QOpenGLContext
         funcs.glBindRenderbuffer(GL_RENDERBUFFER, depth_buffer);
         Q_ASSERT(funcs.glIsRenderbuffer(depth_buffer));
 
-        GLenum storageFormat = GL_DEPTH_STENCIL;
-
         if (samples != 0 ) {
             funcs.glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples,
-                                                   storageFormat, dsSize.width(), dsSize.height());
+                                                   GL_DEPTH24_STENCIL8, dsSize.width(), dsSize.height());
         } else {
-            funcs.glRenderbufferStorage(GL_RENDERBUFFER, storageFormat,
+            funcs.glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_STENCIL,
                                         dsSize.width(), dsSize.height());
         }
 
diff --git a/src/gui/opengl/qopenglfunctions.cpp b/src/gui/opengl/qopenglfunctions.cpp
index 42186ace23..3e9eb3dd0a 100644
--- a/src/gui/opengl/qopenglfunctions.cpp
+++ b/src/gui/opengl/qopenglfunctions.cpp
@@ -388,8 +388,12 @@ static int qt_gl_resolve_extensions()
                 | QOpenGLExtensions::MapBufferRange
                 | QOpenGLExtensions::FramebufferBlit
                 | QOpenGLExtensions::FramebufferMultisample
-                | QOpenGLExtensions::Sized8Formats
-                | QOpenGLExtensions::TextureSwizzle;
+                | QOpenGLExtensions::Sized8Formats;
+#ifndef Q_OS_WASM
+            // WebGL 2.0 specification explicitly does not support texture swizzles
+            // https://www.khronos.org/registry/webgl/specs/latest/2.0/#5.19
+            extensions |= QOpenGLExtensions::TextureSwizzle;
+#endif
         } else {
             // Recognize features by extension name.
             if (extensionMatcher.match("GL_OES_packed_depth_stencil"))