64 lines
1.2 KiB
NASM
64 lines
1.2 KiB
NASM
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; about dialog
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; show the about dialog
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; inputs:
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; none
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; outputs:
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; none
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about_dialog:
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; return if the dialog overlay is already enabled
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in r0, 0x80000300
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cmp r0, 0
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ifnz ret
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; set overlay position
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mov r0, 64
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mov r1, 64
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mov r2, 0
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call move_overlay
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; set overlay size
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mov r0, 256
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mov r1, 128
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mov r2, 0
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call resize_overlay
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; allocate memory for the overlay framebuffer
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mov r0, 131072 ; 256x128x4
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call allocate_memory
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cmp r0, 0
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ifz jmp allocate_error
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mov [about_dialog_framebuffer_ptr], r0
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mov r1, 0
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call set_overlay_framebuffer_pointer
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; fill the overlay with all black
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mov r0, 0xFF000000
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mov r1, 0
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call fill_overlay
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; enable it!!
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mov r0, 0
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call enable_overlay
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about_dialog_event_loop:
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call get_next_event
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; did the user click the menu bar?
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cmp r0, EVENT_TYPE_MENU_BAR_CLICK
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ifz mov r0, menu_items_root
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ifz call menu_bar_click_event
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; is the user in a menu?
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cmp r0, EVENT_TYPE_MENU_UPDATE
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ifz call menu_update_event
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; did the user click a menu item?
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cmp r0, EVENT_TYPE_MENU_CLICK
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ifz call menu_click_event
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call yield_task
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jmp about_dialog_event_loop
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about_dialog_framebuffer_ptr: data.32 0
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