Cleanup misplaced

[huxingyi]

Hi, I found a small issue in the code, when you have multiple windows, close one of them will delete other window's shadow map:

codesamples/bike_shadows/shadowrenderwindow.cpp

Line 19 in 985f057

glDeleteTextures(1, &m_shadowMapTex);

The cleanup operation should be put into a slot for aboutToBeDestroyed

void ShadowRenderWindow::cleanup()
{
    makeCurrent();
    if(m_shadowMapTex > 0)
        glDeleteTextures(1, &m_shadowMapTex);
    if(m_shadowMapFBO > 0)
        glDeleteFramebuffers(1, &m_shadowMapFBO);
    doneCurrent();
}

void ShadowRenderWindow::initializeGL()
{
    connect(context(), &QOpenGLContext::aboutToBeDestroyed, this, &ShadowRenderWindow::cleanup);
    .... ....
}

[pnudupa]

Hi @huxingyi - My genuine apologies for the super late reply. I will check this out and update the code. Thank you so much for your contribution.