Use global share context in QRhiGles2

Needed for using native textures in WebEngine.

Task-number: QTBUG-78682
Change-Id: I8458b17767bb992357064d85f159781ea24e61dc
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/gui/rhi/qrhigles2.cpp b/src/gui/rhi/qrhigles2.cpp
index 139375fbec..9a311101e1 100644
--- a/src/gui/rhi/qrhigles2.cpp
+++ b/src/gui/rhi/qrhigles2.cpp
@@ -413,6 +413,10 @@ bool QRhiGles2::create(QRhi::Flags flags)
     if (!importedContext) {
         ctx = new QOpenGLContext;
         ctx->setFormat(requestedFormat);
+        if (QOpenGLContext *shareContext = qt_gl_global_share_context()) {
+            ctx->setShareContext(shareContext);
+            ctx->setScreen(shareContext->screen());
+        }
         if (!ctx->create()) {
             qWarning("QRhiGles2: Failed to create context");
             delete ctx;