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From 2c0a03e9aea13831d05ac03996949f888afd5085 Mon Sep 17 00:00:00 2001
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From: Jaehak Lee <jaehak.lee@mobis.co.kr>
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Date: Sun, 8 Nov 2020 11:40:06 +0900
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Subject: [PATCH 07/19] Do not try to eglMakeCurrent for unintended case
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The QSGThreadedRenderLoop::hide can be called at twice,
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when the QWindowPrivate::setVisible(false) is called.
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The eglSurface is EGL_NO_SURFACE when the second QSGThreadedRenderLoop::hide is
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called. And if EGL_KHR_surfaceless_context is supported, the eglMakeCurrent
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don't return the false.
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But this case is not intended. So, add the defence code for above case.
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Fixes: QTBUG-88277
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Change-Id: Ia9e5990303e98f0eedc48531e5af62ff9961f419
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Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
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Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
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---
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.../client/wayland-egl/qwaylandglcontext.cpp | 6 ++++++
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.../client/wayland-egl/qwaylandglcontext.h | 1 +
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2 files changed, 7 insertions(+)
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diff --git a/src/hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp b/src/hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp
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index ccebf43d..681f82f4 100644
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--- a/src/hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp
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+++ b/src/hardwareintegration/client/wayland-egl/qwaylandglcontext.cpp
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@@ -336,6 +336,8 @@ QWaylandGLContext::QWaylandGLContext(EGLDisplay eglDisplay, QWaylandDisplay *dis
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<< "It may also cause the event loop to freeze in some situations";
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}
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+ m_supportSurfaceLessContext = q_hasEglExtension(m_eglDisplay, "EGL_KHR_surfaceless_context");
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+
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updateGLFormat();
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}
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@@ -439,6 +441,10 @@ bool QWaylandGLContext::makeCurrent(QPlatformSurface *surface)
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eglSurface = window->eglSurface();
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}
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+ if (eglSurface == EGL_NO_SURFACE && m_supportSurfaceLessContext) {
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+ return false;
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+ }
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+
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if (!eglMakeCurrent(m_eglDisplay, eglSurface, eglSurface, m_context)) {
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qWarning("QWaylandGLContext::makeCurrent: eglError: %x, this: %p \n", eglGetError(), this);
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window->setCanResize(true);
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diff --git a/src/hardwareintegration/client/wayland-egl/qwaylandglcontext.h b/src/hardwareintegration/client/wayland-egl/qwaylandglcontext.h
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index 46c7bb76..93edaec0 100644
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--- a/src/hardwareintegration/client/wayland-egl/qwaylandglcontext.h
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+++ b/src/hardwareintegration/client/wayland-egl/qwaylandglcontext.h
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@@ -93,6 +93,7 @@ private:
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DecorationsBlitter *m_blitter = nullptr;
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uint m_api;
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bool m_supportNonBlockingSwap = true;
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+ bool m_supportSurfaceLessContext = false;
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};
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}
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--
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2.31.1
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