waffle_display 3
waffle_display waffle_display_connect waffle_display_disconnect waffle_display_supports_context_api waffle_display_get_native class waffle_display

Waffle Manual

waffle

    #include <waffle.h>

    struct waffle_display;

struct waffle_display* `waffle_display_connect` const char* name bool `waffle_display_disconnect` struct waffle_display *self bool `waffle_display_supports_context_api` struct waffle_display *self int32_t context_api union waffle_native_display* `waffle_display_get_native` struct waffle_display *self

## Description

struct waffle_display

  An opaque type.

`waffle_display_connect()`

  Connect to a display. The interpretation of name differs according to the platform given to `waffle_init` 3.

  On Android, CGL and WGL name is ignored.

  On the X11 platforms, GLX and X11/EGL, the function connects to the X11 display with the given name. If name is null, then it uses the value of the environment variable `DISPLAY`.

  On Wayland, the function connects to the Wayland display with the given name. If name is null, then it uses the value of the environment variable `WAYLAND_DISPLAY`.

  On GBM, the function opens the device at the filepath name. If name is NULL, then the function uses the value of environment variable `WAFFLE_GBM_DEVICE`. If name is null and `WAFFLE_GBM_DEVICE` is unset, then the function iterates using udev through the set of card devices in the drm subsystem, which are usually located in `/dev/dri`, and attempts to open each in turn with `open(O_RDWR | O_CLOEXEC)` until successful.

`waffle_display_disconnect()`

  Disconnect from the waffle_display and release it's memory. All pointers to waffle objects that were created with the display become invalid.

`waffle_display_supports_context_api()`

  Check if the display is capable of creating a `waffle_context` 3 with the given context_api. See `waffle_config` 3 for choices of context_api and expectations for each platform.

`waffle_display_get_native()`

  Get the display's underlying native objects. Use `free` 3 to deallocate the returned pointer. See `waffle_native` 3 for the definition of union waffle_native_display.

## Return Value

## Errors

No errors are specific to any of the waffle_display functions.

## See Also

waffle 7