webassembly: fix depth and stencil opengl framebuffers

webgl has different specifics

Task-number: QTBUG-66944
Change-Id: Ie1ad61715ba13e0865ae2d2bfd80c88d1ae9c18f
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/widgets/kernel/qopenglwidget.cpp b/src/widgets/kernel/qopenglwidget.cpp
index c96b6812c4..c1bf3cd4af 100644
--- a/src/widgets/kernel/qopenglwidget.cpp
+++ b/src/widgets/kernel/qopenglwidget.cpp
@@ -906,9 +906,17 @@ void QOpenGLWidgetPrivate::invalidateFbo()
         const int gl_color_attachment0 = 0x8CE0;  // GL_COLOR_ATTACHMENT0
         const int gl_depth_attachment = 0x8D00;   // GL_DEPTH_ATTACHMENT
         const int gl_stencil_attachment = 0x8D20; // GL_STENCIL_ATTACHMENT
+#ifdef Q_OS_HTML5
+        const int gl_depth_stencil_attachment = 0x821A; // GL_DEPTH_STENCIL_ATTACHMENT
+
+        const GLenum attachments[] = {
+            gl_color_attachment0, gl_depth_attachment, gl_stencil_attachment, gl_depth_stencil_attachment
+        };
+#else
         const GLenum attachments[] = {
             gl_color_attachment0, gl_depth_attachment, gl_stencil_attachment
         };
+#endif
         f->glDiscardFramebufferEXT(GL_FRAMEBUFFER, sizeof attachments / sizeof *attachments, attachments);
     } else {
         f->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);