From d9847c969a999b8c614cc937a2239fbfc2567bca Mon Sep 17 00:00:00 2001
From: Mike Krus <mike.krus@kdab.com>
Date: Tue, 15 Dec 2020 17:22:56 +0000
Subject: Print warning about using primitive restart on ES2

Change-Id: I6007f1e152e38948b619cdeada84a86f7f4db4e4
Reviewed-by: Paul Lemire <paul.lemire@kdab.com>
(cherry picked from commit 492c976b05256b29aac0df861c4be77e1eb65906)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/plugins/renderers/opengl/graphicshelpers/graphicshelperes2.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/plugins/renderers/opengl/graphicshelpers/graphicshelperes2.cpp b/src/plugins/renderers/opengl/graphicshelpers/graphicshelperes2.cpp
index f485fc57b..8b9832a42 100644
--- a/src/plugins/renderers/opengl/graphicshelpers/graphicshelperes2.cpp
+++ b/src/plugins/renderers/opengl/graphicshelpers/graphicshelperes2.cpp
@@ -709,6 +709,11 @@ void GraphicsHelperES2::memoryBarrier(QMemoryBarrier::Operations barriers)
 
 void GraphicsHelperES2::enablePrimitiveRestart(int)
 {
+    static bool showWarning = true;
+    if (!showWarning)
+        return;
+    showWarning = false;
+    qWarning() << "primitive restart is not supported by OpenGL ES 2.0 (since GL 3.1, ES 3.0)";
 }
 
 void GraphicsHelperES2::enableVertexAttributeArray(int location)
-- 
cgit v1.2.3