[kwin] [Bug 360033] Cannot enable compositing with OpenGL GLX

[Thomas Lübking via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=360033

--- Comment #34 from Thomas Lübking <thomas.luebk...@gmail.com> ---
Just copy from the web page, the browser should do "the right thing™"

Let's see whether glReadPixels reads "something" and just the painting fails
(you need to revert the skipping patch)


diff --git a/libkwineffects/kwinglutils.cpp b/libkwineffects/kwinglutils.cpp
index 9a6b2da..048ab30 100644
--- a/libkwineffects/kwinglutils.cpp
+++ b/libkwineffects/kwinglutils.cpp
@@ -756,7 +756,7 @@ bool ShaderManager::selfTest()
     vbo->bindArrays();

     glViewport(0, 0, 32, 32);
-    glClearColor(0, 0, 0, 0);
+    glClearColor(1, 0, 1, 1);

     // Set up the projection matrix
     QMatrix4x4 matrix;

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