The window to query.
Where to store the x-axis content scale, or null.
Where to store the y-axis content scale, or null.
Errors: Possible errors include @ref GLFW_NOT_INITIALIZED and @ref GLFW_PLATFORM_ERROR.
This function must only be called from the main thread.
@sa @ref window_scale @sa @ref glfwSetWindowContentScaleCallback @sa @ref glfwGetMonitorContentScale
Added in version 3.3.
Ingroup: window
Retrieves the content scale for the specified window.
This function retrieves the content scale for the specified window. The content scale is the ratio between the current DPI and the platform's default DPI. This is especially important for text and any UI elements. If the pixel dimensions of your UI scaled by this look appropriate on your machine then it should appear at a reasonable size on other machines regardless of their DPI and scaling settings. This relies on the system DPI and scaling settings being somewhat correct.
On systems where each monitors can have its own content scale, the window content scale will depend on which monitor the system considers the window to be on.