1WAFFLE_DISPLAY(3)                Waffle Manual               WAFFLE_DISPLAY(3)
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NAME

6       waffle_display, waffle_display_connect, waffle_display_disconnect,
7       waffle_display_supports_context_api, waffle_display_get_native - class
8       waffle_display
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SYNOPSIS

11       #include <waffle.h>
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13       struct waffle_display;
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16       struct waffle_display* waffle_display_connect(const char* name);
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18       bool waffle_display_disconnect(struct waffle_display *self);
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20       bool waffle_display_supports_context_api(struct waffle_display *self,
21                                                int32_t context_api);
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23       union waffle_native_display*
24                                                              waffle_display_get_native(struct waffle_display *self);
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DESCRIPTION

27       struct waffle_display
28           An opaque type.
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30       waffle_display_connect()
31           Connect to a display. The interpretation of name differs according
32           to the platform given to waffle_init(3).
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34           On Android, CGL and WGL name is ignored.
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36           On the X11 platforms, GLX and X11/EGL, the function connects to the
37           X11 display with the given name. If name is null, then it uses the
38           value of the environment variable DISPLAY.
39
40           On Wayland, the function connects to the Wayland display with the
41           given name. If name is null, then it uses the value of the
42           environment variable WAYLAND_DISPLAY.
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44           On GBM, the function opens the device at the filepath name. If name
45           is NULL, then the function uses the value of environment variable
46           WAFFLE_GBM_DEVICE. If name is null and WAFFLE_GBM_DEVICE is unset,
47           then the function iterates using udev through the set of card
48           devices in the drm subsystem, which are usually located in
49           /dev/dri, and attempts to open each in turn with open(O_RDWR |
50           O_CLOEXEC) until successful.
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52       waffle_display_disconnect()
53           Disconnect from the waffle_display and release it's memory. All
54           pointers to waffle objects that were created with the display
55           become invalid.
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57       waffle_display_supports_context_api()
58           Check if the display is capable of creating a waffle_context(3)
59           with the given context_api. See waffle_config(3) for choices of
60           context_api and expectations for each platform.
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62       waffle_display_get_native()
63           Get the display's underlying native objects. Use free(3) to
64           deallocate the returned pointer. See waffle_native(3) for the
65           definition of union waffle_native_display.
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RETURN VALUE

68       Functions whose return type is bool return true on success and false on
69       failure. Functions whose return type is a pointer return NULL on
70       failure. Use waffle_error_get_info(3) to get information about any
71       errors.
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ERRORS

74       See waffle_error(3) for the complete list of waffle's error codes.
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76       No errors are specific to any of the waffle_display functions.
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ISSUES

79       Please report bugs or and feature requests to
80       https://gitlab.freedesktop.org/mesa/waffle/issues.
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SEE ALSO

83       waffle(7)
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AUTHOR

86       Chad Versace <chad.versace@linux.intel.com>
87           Maintainer
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90       Copyright © 2013 Intel
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92       This manual page is licensed under the Creative Commons
93       Attribution-ShareAlike 3.0 United States License (CC BY-SA 3.0). To
94       view a copy of this license, visit
95       http://creativecommons.org.license/by-sa/3.0/us.
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100waffle                            07/29/2020                 WAFFLE_DISPLAY(3)
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