xcb_xv_get_port_attribute(3)

💅 xcb_xv_get_port_attribute 💅

okay bestie, so this is a page from the XCB Requests manual (section 3, the library-call girlies 🫶). It's literally called xcb_xv_get_port_attribute and yes, we're gonna go through every single line together. no skimming, no skipping, we're doing this properly. periodt. ✨

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🌸 NAME 🌸

xcb_xv_get_port_attribute — and that's it. That's the whole description. The original just leaves it hanging there after the dash, like a text you sent at 2am and never finished. the vibes are mysterious, ngl.

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🦋 SYNOPSIS 🦋

First things first, you gotta pull in the header:

#include <xcb/xv.h>

✨ Request function ✨

xcb_xv_get_port_attribute_cookie_t
       xcb_xv_get_port_attribute(xcb_connection_t *conn,
       xcb_xv_port_t port, xcb_atom_t attribute);

🎀 Reply datastructure 🎀

here's the lil struct the reply comes back in, look at her:

typedef struct xcb_xv_get_port_attribute_reply_t {
    uint8_t  response_type;
    uint8_t  pad0;
    uint16_t sequence;
    uint32_t length;
    int32_t  value;
} xcb_xv_get_port_attribute_reply_t;

🧚 Reply function 🧚

xcb_xv_get_port_attribute_reply_t
       *xcb_xv_get_port_attribute_reply(xcb_connection_t *conn,
       xcb_xv_get_port_attribute_cookie_t cookie,
       xcb_generic_error_t **e);

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💖 REQUEST ARGUMENTS 💖

the tea on what you're feeding this function:

• conn — your XCB connection to X11. the whole reason we're here, honestly.
• port — TODO: NOT YET DOCUMENTED. 🙈 like, the docs simply did not show up to class that day.
• attribute — TODO: NOT YET DOCUMENTED. same energy. we know nothing. it's giving mystery box. 📦

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⭐ REPLY FIELDS ⭐

what comes back in the struct, one field at a time:

• response_type — the type of this reply, and in this case it's XCB_XV_GET_PORT_ATTRIBUTE. this field is also chilling inside the xcb_generic_reply_t, which is how you tell replies apart from each other. very main character, very useful. 👑
• sequence — the sequence number of the last request the X11 server processed. it's the receipt number of the server world. 🧾
• length — how long the reply is, measured in words. and heads up, bestie: one word = 4 bytes. 💀 don't forget that, it will get you.
• value — TODO: NOT YET DOCUMENTED. the docs really said "¯\_(ツ)_/¯" on this one.

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🌈 DESCRIPTION 🌈

so... there is genuinely nothing here. the original DESCRIPTION section is empty. it's an empty section, standing there, looking cute, saying absolutely nothing. iconic honestly. 🎀

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💜 RETURN VALUE 💜

You get back an xcb_xv_get_port_attribute_cookie_t. Errors have to be handled when you call the reply function, xcb_xv_get_port_attribute_reply. that's the moment of truth, no cap. 🍪

But if you'd rather handle your errors in the event loop instead (valid!! different strokes!!), use xcb_xv_get_port_attribute_unchecked and peep xcb-requests(3) for the details.

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🔥 ERRORS 🔥

This request does never generate any errors. literally never. not a single one. she's drama-free, she's unbothered, she's at peace. 😌✨

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🫶 SEE ALSO 🫶

nothing here either. empty. a whole section with no friends. we still love her. 💖

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🌟 AUTHOR 🌟

Generated from xv.xml. If you've got corrections or improvements, hit up xcb@lists.freedesktop.org. be nice, they're doing their best. 🙏

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okay that's the whole page, bestie, you're officially smarter than you were five minutes ago and that's on growth. 💅

sourced from X Version 11, libxcb 1.17.0, and filed under xcb_xv_get_port_attribute(3) — mwah, go slay. 💖✨🎀🦋