What Is Gvdgrf WSFger WFEW?
gvdgrf wsfger wfew is a function that retrieves information about windows in OpenGL or OpenGL ES contexts.gvdgrf wsfger wfew Its return values reflect a window’s state or inherent properties as well as its OpenGL or OpenGL ES context.
Window Attribs
In addition to the GLFW_DECORATED, GLFW_RESIZABLE, GLFW_FLOATING and GLFW_AUTO_ICONIFY window attributes, there are many other hints that can be used for a given window.gvdgrf wsfger wfew Some of these hints are related to the window itself, while others are to its OpenGL or OpenGL ES context. For example, a window may have input focus, have an icon on some platforms or be maximized.
Window Content Scale
GLFW_SCALE_TO_MONITOR specifies whether the window content scale should be resized based on the monitor content scale of any monitor it is placed on, including its initial placement when it is created. This is useful if your application needs to be able to resize the window as its content scale changes, either during system settings change or if it is moved to another monitor with a different content scale.
Window Frame Size
Decorated windows typically have title bars and window frames around the rectangle in which they are displayed. You can get the extents of these with glfwGetWindowFrameSize. This function returns distances in screen coordinates from the edges of the content area to the corresponding edges of the full window.
Logical Coordinates
Unlike screen or device coordinates, which are specified as positive or negative absolute values in screen coordinates, logical coordinates are encoded literally. This allows a DWF reading application to scale the illustration to match its display or the user to zoom in on it with sufficient precision to render fine details.
There are two main types of logical coordinates: relative and absolute. Relative coordinates are formed by subtracting the previous absolute coordinate from the current one. Absolute coordinates are a range of 31-bit signed integers (32-bit unsigned) with a legal value from 0 to 2,147,483,647 (231 - 1).
In order to create the file correctly, a DWF writer must know how to convert the logical coordinate values into the screen or device coordinates that it expects. Several functions exist to do this, such as glfwGetFrameBufferSize.
Window Hints
Besides the standard GLFW_DECORATED, FLOATING and GLFW_AUTO_ICONIFY attributes that can be obtained by using glfwGetWindowAttrib, there are several other hints that can be used for determining the size of a decorated window’s framebuffer. Among these are glfwGetFramebufferSize, glfwGetWindowContentScale and glfwSetWindowFramebufferSize. Using these hints can help your application be more efficient in the way it uses the framebuffer of a decorated window by providing it with the maximum possible width and height of its framebuffer on any platform.