From e40fdf19abd4fe6d8f3a31088671bfc1c4aa03cc Mon Sep 17 00:00:00 2001
From: Even Oscar Andersen <even.oscar.andersen@qt.io>
Date: Tue, 25 Jun 2024 11:51:47 +0200
Subject: wasm: hellogl2 screen is black

We need to reset the OpenGL state in paintGL for the drawing
to work,

Also, disable the dock/add window functionality as it does not
work on webassembly.

Change-Id: I480d944bc2029a07d5d49f0a85c3754fbc8cd53c
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
---
 examples/opengl/hellogl2/glwidget.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'examples/opengl/hellogl2/glwidget.cpp')

diff --git a/examples/opengl/hellogl2/glwidget.cpp b/examples/opengl/hellogl2/glwidget.cpp
index 6d2ffb3b581..aad83cc2af5 100644
--- a/examples/opengl/hellogl2/glwidget.cpp
+++ b/examples/opengl/hellogl2/glwidget.cpp
@@ -7,6 +7,7 @@
 #include <QCoreApplication>
 #include <math.h>
 
+// Set from main
 bool GLWidget::m_transparent = false;
 
 GLWidget::GLWidget(QWidget *parent)
@@ -209,9 +210,11 @@ void GLWidget::setupVertexAttribs()
 
 void GLWidget::paintGL()
 {
+    glClearColor(0, 0, 0, m_transparent ? 0 : 1);
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
     glEnable(GL_DEPTH_TEST);
     glEnable(GL_CULL_FACE);
+    setupVertexAttribs();
 
     m_world.setToIdentity();
     m_world.rotate(180.0f - (m_xRot / 16.0f), 1, 0, 0);
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