Revert of [1]+[2] from [3] for [4][5]
[1] https://github.com/qt/qtwebengine/commit/ddcd30454a
[2] https://github.com/qt/qtwebengine/commit/9168bc6f53
[3] https://bugreports.qt.io/browse/QTBUG-136257
[4] https://bugreports.qt.io/browse/QTBUG-139424
[5] https://bugs.gentoo.org/962055
--- a/src/core/ozone/egl_helper.cpp
+++ b/src/core/ozone/egl_helper.cpp
@@ -7,5 +7,7 @@
 #include "web_engine_context.h"
 
+#include <QtCore/qthread.h>
 #include <QtGui/qguiapplication.h>
+#include <QtGui/qoffscreensurface.h>
 #include <QtGui/qopenglcontext.h>
 #include <QtGui/qopenglfunctions.h>
@@ -58,4 +60,82 @@
 QT_BEGIN_NAMESPACE
 
+class ScopedGLContext
+{
+public:
+    ScopedGLContext(QOffscreenSurface *surface, EGLHelper::EGLFunctions *eglFun)
+        : m_context(new QOpenGLContext()), m_eglFun(eglFun)
+    {
+        if ((m_previousEGLContext = m_eglFun->eglGetCurrentContext())) {
+            m_previousEGLDrawSurface = m_eglFun->eglGetCurrentSurface(EGL_DRAW);
+            m_previousEGLReadSurface = m_eglFun->eglGetCurrentSurface(EGL_READ);
+            m_previousEGLDisplay = m_eglFun->eglGetCurrentDisplay();
+        }
+
+        if (!m_context->create()) {
+            qWarning("Failed to create OpenGL context.");
+            return;
+        }
+
+        Q_ASSERT(surface->isValid());
+        if (!m_context->makeCurrent(surface)) {
+            qWarning("Failed to make OpenGL context current.");
+            return;
+        }
+    }
+
+    ~ScopedGLContext()
+    {
+        if (!m_textures.empty()) {
+            auto *glFun = m_context->functions();
+            glFun->glDeleteTextures(m_textures.size(), m_textures.data());
+        }
+
+        if (m_previousEGLContext) {
+            // Make sure the scoped context is not current when restoring the previous
+            // EGL context otherwise the QOpenGLContext destructor resets the restored
+            // current context.
+            m_context->doneCurrent();
+
+            m_eglFun->eglMakeCurrent(m_previousEGLDisplay, m_previousEGLDrawSurface,
+                                     m_previousEGLReadSurface, m_previousEGLContext);
+            if (m_eglFun->eglGetError() != EGL_SUCCESS)
+                qWarning("Failed to restore EGL context.");
+        }
+    }
+
+    bool isValid() const { return m_context->isValid() && (m_context->surface() != nullptr); }
+
+    EGLContext eglContext() const
+    {
+        QNativeInterface::QEGLContext *nativeInterface =
+                m_context->nativeInterface<QNativeInterface::QEGLContext>();
+        return nativeInterface->nativeContext();
+    }
+
+    uint createTexture(int width, int height)
+    {
+        auto *glFun = m_context->functions();
+
+        uint glTexture;
+        glFun->glGenTextures(1, &glTexture);
+        glFun->glBindTexture(GL_TEXTURE_2D, glTexture);
+        glFun->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE,
+                            NULL);
+        glFun->glBindTexture(GL_TEXTURE_2D, 0);
+
+        m_textures.push_back(glTexture);
+        return glTexture;
+    }
+
+private:
+    QScopedPointer<QOpenGLContext> m_context;
+    EGLHelper::EGLFunctions *m_eglFun;
+    EGLContext m_previousEGLContext = nullptr;
+    EGLSurface m_previousEGLDrawSurface = nullptr;
+    EGLSurface m_previousEGLReadSurface = nullptr;
+    EGLDisplay m_previousEGLDisplay = nullptr;
+    std::vector<uint> m_textures;
+};
+
 EGLHelper::EGLFunctions::EGLFunctions()
 {
@@ -64,6 +144,4 @@
     eglCreateImage =
             reinterpret_cast<PFNEGLCREATEIMAGEPROC>(context->getProcAddress("eglCreateImage"));
-    eglCreateDRMImageMESA = reinterpret_cast<PFNEGLCREATEDRMIMAGEMESAPROC>(
-            context->getProcAddress("eglCreateDRMImageMESA"));
     eglDestroyImage =
             reinterpret_cast<PFNEGLDESTROYIMAGEPROC>(context->getProcAddress("eglDestroyImage"));
@@ -94,4 +172,5 @@
     : m_eglDisplay(qApp->platformNativeInterface()->nativeResourceForIntegration("egldisplay"))
     , m_functions(new EGLHelper::EGLFunctions())
+    , m_offscreenSurface(new QOffscreenSurface())
 {
     const char *extensions = m_functions->eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
@@ -111,4 +190,7 @@
     }
 
+    Q_ASSERT(QThread::currentThread() == qApp->thread());
+    m_offscreenSurface->create();
+
     m_isDmaBufSupported = QtWebEngineCore::WebEngineContext::isGbmSupported();
 
@@ -118,5 +200,4 @@
         m_isDmaBufSupported = strstr(displayExtensions, "EGL_EXT_image_dma_buf_import")
                 && strstr(displayExtensions, "EGL_EXT_image_dma_buf_import_modifiers")
-                && strstr(displayExtensions, "EGL_MESA_drm_image")
                 && strstr(displayExtensions, "EGL_MESA_image_dma_buf_export");
     }
@@ -139,15 +220,17 @@
         return;
 
-    // clang-format off
-    EGLint attribs[] = {
-        EGL_WIDTH, width,
-        EGL_HEIGHT, height,
-        EGL_DRM_BUFFER_FORMAT_MESA, EGL_DRM_BUFFER_FORMAT_ARGB32_MESA,
-        EGL_DRM_BUFFER_USE_MESA, EGL_DRM_BUFFER_USE_SHARE_MESA,
-        EGL_NONE
-    };
-    // clang-format on
+    ScopedGLContext context(m_offscreenSurface.get(), m_functions.get());
+    if (!context.isValid())
+        return;
+
+    EGLContext eglContext = context.eglContext();
+    if (!eglContext) {
+        qWarning("EGL: No EGLContext.");
+        return;
+    }
 
-    EGLImage eglImage = m_functions->eglCreateDRMImageMESA(m_eglDisplay, attribs);
+    uint64_t textureId = context.createTexture(width, height);
+    EGLImage eglImage = m_functions->eglCreateImage(m_eglDisplay, eglContext, EGL_GL_TEXTURE_2D,
+                                                    (EGLClientBuffer)textureId, NULL);
     if (eglImage == EGL_NO_IMAGE) {
         qWarning("EGL: Failed to create EGLImage: %s", getLastEGLErrorString());
--- a/src/core/ozone/egl_helper.h
+++ b/src/core/ozone/egl_helper.h
@@ -13,5 +13,4 @@
 
 #undef eglCreateImage
-#undef eglCreateDRMImageMESA
 #undef eglDestroyImage
 #undef eglExportDMABUFImageMESA
@@ -26,4 +25,6 @@
 QT_BEGIN_NAMESPACE
 
+class QOffscreenSurface;
+
 class EGLHelper
 {
@@ -34,5 +35,4 @@
 
         PFNEGLCREATEIMAGEPROC eglCreateImage;
-        PFNEGLCREATEDRMIMAGEMESAPROC eglCreateDRMImageMESA;
         PFNEGLDESTROYIMAGEPROC eglDestroyImage;
         PFNEGLEXPORTDMABUFIMAGEMESAPROC eglExportDMABUFImageMESA;
@@ -60,4 +60,5 @@
     EGLDisplay m_eglDisplay = EGL_NO_DISPLAY;
     QScopedPointer<EGLFunctions> m_functions;
+    QScopedPointer<QOffscreenSurface> m_offscreenSurface;
     bool m_isDmaBufSupported = false;
 };