95 lines
2.6 KiB
NASM
95 lines
2.6 KiB
NASM
; mouse routines
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; gets the current position of the mouse cursor
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; this gets the position of the cursor overlay, rather than actually getting the mouse position
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; inputs:
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; none
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; outputs:
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; r0: X coordinate
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; r1: Y coordinate
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get_mouse_position:
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in r0, 0x0200001F ; overlay 31: position
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mov r1, r0
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and r0, 0x0000FFFF ; r0: overlay X position
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sra r1, 16 ; r1: overlay Y position
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ret
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; gets the current state of the mouse button
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; inputs:
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; none
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; outputs:
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; r0: button state
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get_mouse_button:
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in r0, 0x02000400 ; mouse button states
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ret
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; updates the cursor position and pushes a mouse_click_event_type event to the event stack if the mouse button was clicked
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; this should only be called by system_vsync_handler
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mouse_update:
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push r0
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push r1
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push r2
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push r3
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push r4
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push r5
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mov r0, 0x0200001F ; overlay 31: position
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in r2, 0x02000401 ; mouse position
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out r0, r2
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movz.16 r0, r2 ; r0: X position
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mov r1, r2
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sra r1, 16 ; r1: Y position
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mov r2, 0x02000400 ; mouse button states
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in r3, r2
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; check click bit
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bts r3, 0
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ifz jmp mouse_update_end
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; mouse was clicked
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out r2, 0 ; clear all button state bits
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; check if the mouse was clicked in the menu bar
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;mov r2, 30
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;call overlay_check_if_enabled_covers_position
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;ifz jmp mouse_update_menu_was_clicked
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; if Y <= 16, mouse was clicked in the menu bar
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; this is less expensive than calling overlay_check_if_enabled_covers_position every frame
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cmp r1, 17
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ifc jmp mouse_update_menu_was_clicked
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; if a submenu is open, don't push a click event
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; this is hacky as fuck
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in r3, 0x0200031D ; overlay 29: enable status
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cmp r3, 0
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ifnz jmp mouse_update_end
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; otherwise, just push a standard mouse click event to the event stack
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mov r2, r1 ; copy Y position to event parameter 1
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mov r1, r0 ; copy X position to event parameter 0
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mov r3, 0
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mov r4, 0
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mov r5, 0
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mov r0, mouse_click_event_type ; set event type to mouse type
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call push_event
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jmp mouse_update_end
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mouse_update_menu_was_clicked:
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mov r2, r1 ; copy Y position to event parameter 1
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mov r1, r0 ; copy X position to event parameter 0
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mov r3, 0
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mov r4, 0
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mov r5, 0
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mov r0, menu_bar_click_event_type ; set event type to menu bar click type
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call push_event
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mouse_update_end:
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pop r5
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pop r4
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pop r3
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pop r2
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pop r1
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pop r0
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ret |