Add a constructor to QEglProperties which takes an EGLConfig

The constructor then extracts all the attributes from the config. Useful
for dumping all the attributes for a particular config to qDebug().

2 files changed, 15 insertions, 0 deletions

diff --git a/src/gui/egl/qeglproperties.cpp b/src/gui/egl/qeglproperties.cpp
index e0ae8a6..fefd070 100644
--- a/src/gui/egl/qeglproperties.cpp
+++ b/src/gui/egl/qeglproperties.cpp
@@ -46,12 +46,26 @@ QT_BEGIN_NAMESPACE
 #include <QtCore/qdebug.h>
 #include <QtCore/qstringlist.h>
 
+#include "qegl_p.h"
+
+
 // Initialize a property block.
 QEglProperties::QEglProperties()
 {
     props.append(EGL_NONE);
 }
 
+QEglProperties::QEglProperties(EGLConfig cfg)
+{
+    props.append(EGL_NONE);
+    for (int name = 0x3020; name <= 0x304F; ++name) {
+        EGLint value;
+        if (name != EGL_NONE && eglGetConfigAttrib(QEglContext::defaultDisplay(0), cfg, name, &value))
+            setValue(name, value);
+    }
+    eglGetError();  // Clear the error state.
+}
+
 // Fetch the current value associated with a property.
 int QEglProperties::value(int name) const
 {
diff --git a/src/gui/egl/qeglproperties_p.h b/src/gui/egl/qeglproperties_p.h
index 81af4cd..bcdc657 100644
--- a/src/gui/egl/qeglproperties_p.h
+++ b/src/gui/egl/qeglproperties_p.h
@@ -107,6 +107,7 @@ class Q_GUI_EXPORT QEglProperties
 {
 public:
     QEglProperties();
+    QEglProperties(EGLConfig);
     QEglProperties(const QEglProperties& other) : props(other.props) {}
     ~QEglProperties() {}