Added methods to get the currently active context, query whether an OpenGL extension is available and query the actual OpenGL version of a context, made context switches during initialization of texture and shader static values unnecessary, fixed code style in loaders.

include/SFML/Graphics/Shader.hpp

@@ -498,9 +498,6 @@ public:
     /// the shader features. If it returns false, then
     /// any attempt to use sf::Shader will fail.
     ///
-    /// Note: The first call to this function, whether by your
-    /// code or SFML will result in a context switch.
-    ///
     /// \return True if shaders are supported, false otherwise
     ///
     ////////////////////////////////////////////////////////////

include/SFML/Graphics/Texture.hpp

@@ -472,9 +472,6 @@ public:
     /// You can expect a value of 512 pixels for low-end graphics
     /// card, and up to 8192 pixels or more for newer hardware.
     ///
-    /// Note: The first call to this function, whether by your
-    /// code or SFML will result in a context switch.
-    ///
     /// \return Maximum size allowed for textures, in pixels
     ///
     ////////////////////////////////////////////////////////////

include/SFML/Window/Context.hpp

@@ -77,7 +77,28 @@ public:
     ////////////////////////////////////////////////////////////
     bool setActive(bool active);
 
-public:
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the settings of the context
+    ///
+    /// Note that these settings may be different than the ones
+    /// passed to the constructor; they are indeed adjusted if the
+    /// original settings are not directly supported by the system.
+    ///
+    /// \return Structure containing the settings
+    ///
+    ////////////////////////////////////////////////////////////
+    const ContextSettings& getSettings() const;
+
+    ////////////////////////////////////////////////////////////
+    /// \brief Check whether a given OpenGL extension is available
+    ///
+    /// \param name Name of the extension to check for
+    ///
+    /// \return True if available, false if unavailable
+    ///
+    ////////////////////////////////////////////////////////////
+    static bool isExtensionAvailable(const char* name);
+
     ////////////////////////////////////////////////////////////
     /// \brief Get the address of an OpenGL function
     ///
@@ -88,6 +109,14 @@ public:
     ////////////////////////////////////////////////////////////
     static GlFunctionPointer getFunction(const char* name);
 
+    ////////////////////////////////////////////////////////////
+    /// \brief Get the currently active context
+    ///
+    /// \return The currently active context or NULL if none is active
+    ///
+    ////////////////////////////////////////////////////////////
+    static const Context* getActiveContext();
+
     ////////////////////////////////////////////////////////////
     /// \brief Construct a in-memory context
     ///