expackf(3alleg4)

✨ expackf ✨

okay bestie, so this one's from the allegro manual, page expackf(3alleg4) — and it's literally all about custom PACKFILE vtables. slay.

🌸 NAME 🌸

expackf — using custom PACKFILE vtables. it's the Allegro game programming library, and this is one of its example programs, periodt. 💅

🦋 SYNOPSIS 🦋

#include <allegro.h>

Example expackf

💖 DESCRIPTION 💖

so this program is a whole demo of the packfile functions, with some simple tests thrown in. not me being obsessed with vtables, but here we are. 🎀

here's the rundown, one test at a time:

1. the first test uses the standard packfile functions to transfer a bitmap file into a block of memory, and then reads that bitmap back out of the block of memory, using a custom packfile vtable. iconic behaviour, honestly.
2. the second test reads in a bitmap with another custom packfile vtable — this one uses libc's file stream functions. yes, the libc ones. fr fr.
3. the third test demonstrates seeking with a custom vtable. the way that it just seeks?? showstopping.
4. the fourth test reads two bitmaps and dumps them back into a single file, using a custom vtable again. two become one, main character energy. 🔥

🧚 Tools 🧚

(yes bestie, this section is literally just titled "Tools" with nothing under it in the original. we respect the emptiness. 💜)

👑 SEE ALSO 👑

go read these next, iykyk:

• ASSERT(3alleg4)
• BITMAP(3alleg4)
• END_OF_MAIN(3alleg4)
• PACKFILE(3alleg4)
• PACKFILE_VTABLE(3alleg4)
• SCREEN_H(3alleg4)
• SCREEN_W(3alleg4)
• alert(3alleg4)
• allegro_error(3alleg4)
• allegro_init(3alleg4)
• allegro_message(3alleg4)
• blit(3alleg4)
• clear_bitmap(3alleg4)
• destroy_bitmap(3alleg4)
• file_size_ex(3alleg4)
• font(3alleg4)
• install_keyboard(3alleg4)
• key(3alleg4)
• load_bmp_pf(3alleg4)
• load_pcx(3alleg4)
• load_pcx_pf(3alleg4)
• load_tga_pf(3alleg4)
• pack_fclose(3alleg4)
• pack_fopen(3alleg4)
• pack_fopen_vtable(3alleg4)
• pack_fread(3alleg4)
• pack_fseek(3alleg4)
• readkey(3alleg4)
• save_bmp_pf(3alleg4)
• save_tga_pf(3alleg4)
• screen(3alleg4)
• set_color_depth(3alleg4)
• set_gfx_mode(3alleg4)
• text_height(3alleg4)
• textprintf_centre_ex(3alleg4)
• textprintf_ex(3alleg4)

💌 and that's the whole page, bestie! this was Allegro version 4.4.3, and yeah, expackf(3alleg4) is the page name. stay hydrated, go read your vtables, and don't forget to pack_fclose what you pack_fopen. mwah! 💋✨🫶