Move detection of GLPlatform and printResults into Scene

This means the GLPlatform is filled with values from the
context actually used for Compositing and if XRender
compositing is used no OpenGL information is logged.

compositingprefs.cpp

@@ -157,9 +157,6 @@ void CompositingPrefs::detect()
     if (!haveContext) {
         canDetect = initEGLContext();
     }
-    if (canDetect) {
-        detectDriverAndVersion();
-    }
     if (!haveContext) {
         deleteEGLContext();
     }
@@ -202,9 +199,7 @@ void CompositingPrefs::detect()
     if (hasglx13)
         oldreaddrawable = glXGetCurrentReadDrawable();
 
-    if (initGLXContext()) {
-        detectDriverAndVersion();
-    }
+    initGLXContext();
     if (hasglx13)
         glXMakeContextCurrent(display(), olddrawable, oldreaddrawable, oldcontext);
     else
@@ -365,12 +360,5 @@ void CompositingPrefs::deleteEGLContext()
 #endif
 }
 
-void CompositingPrefs::detectDriverAndVersion()
-{
-    GLPlatform *gl = GLPlatform::instance();
-    gl->detect();
-    gl->printResults();
-}
-
 } // namespace
 

compositingprefs.h

@@ -58,8 +58,6 @@ public:
 
 protected:
 
-    void detectDriverAndVersion();
-
     bool initGLXContext();
     void deleteGLXContext();
     bool initEGLContext();

scene_opengl_egl.cpp

@@ -42,6 +42,9 @@ SceneOpenGL::SceneOpenGL(Workspace* ws)
         kError(1212) << "Required support for binding pixmaps to EGLImages not found, disabling compositing";
         return;
     }
+    GLPlatform *glPlatform = GLPlatform::instance();
+    glPlatform->detect();
+    glPlatform->printResults();
     initGL();
     if (!hasGLExtension("GL_OES_EGL_image")) {
         kError(1212) << "Required extension GL_OES_EGL_image not found, disabling compositing";

scene_opengl_glx.cpp

@@ -55,9 +55,11 @@ SceneOpenGL::SceneOpenGL(Workspace* ws)
     if (!initRenderingContext())
         return; // error
     // Initialize OpenGL
+    GLPlatform *glPlatform = GLPlatform::instance();
+    glPlatform->detect();
+    glPlatform->printResults();
     initGL();
 
-    GLPlatform *glPlatform = GLPlatform::instance();
     if (glPlatform->isSoftwareEmulation()) {
         kError(1212) << "OpenGL Software Rasterizer detected. Falling back to XRender.";
         QTimer::singleShot(0, Workspace::self(), SLOT(fallbackToXRenderCompositing()));