官方給的類說明是 Configuration contains some openGL variables。意思是Configuration包含了一些openGL易變的東西。
查看類內容之後發現,Configuration正如它的名字一樣,提供的是一些配置信息。具體如下。
/** OpenGL Max texture size. */
int getMaxTextureSize() const;
/** OpenGL Max Modelview Stack Depth. */
int getMaxModelviewStackDepth() const;
/** returns the maximum texture units
@since v2.0.0
*/
int getMaxTextureUnits() const;
/** Whether or not the GPU supports NPOT (Non Power Of Two) textures.
OpenGL ES 2.0 already supports NPOT (iOS).
@since v0.99.2
*/
bool supportsNPOT() const;
/** Whether or not PVR Texture Compressed is supported */
bool supportsPVRTC() const;
/** Whether or not ETC Texture Compressed is supported */
bool supportsETC() const;
/** Whether or not S3TC Texture Compressed is supported */
bool supportsS3TC() const;
/** Whether or not ATITC Texture Compressed is supported */
bool supportsATITC() const;
/** Whether or not BGRA8888 textures are supported.
@since v0.99.2
*/
bool supportsBGRA8888() const;
/** Whether or not glDiscardFramebufferEXT is supported
@since v0.99.2
*/
bool supportsDiscardFramebuffer() const;
/** Whether or not shareable VAOs are supported.
@since v2.0.0
*/
bool supportsShareableVAO() const;
/** Max support directional light in shader, for Sprite3D
@since v3.3
*/
int getMaxSupportDirLightInShader() const;
/** Max support point light in shader, for Sprite3D
*since v3.3
*/
int getMaxSupportPointLightInShader() const;
/** Max support spot light in shader, for Sprite3D
*since v3.3
*/
int getMaxSupportSpotLightInShader() const;
/** returns whether or not an OpenGL is supported */
bool checkForGLExtension(const std::string &searchName) const;
提供了一些openGL屬性的獲取方法。