mirror of
https://github.com/ApfelTeeSaft/Perfectium.git
synced 2026-08-26 19:33:36 +00:00
127 lines
3.5 KiB
NASM
127 lines
3.5 KiB
NASM
INCLUDE include\master.inc
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.data?
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ZI_mouseDown BYTE 5 DUP(?) ; mouseDown[5]
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ZI_mouseDownAlready BYTE 256 DUP(?) ; mouseDownAlready[256]
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ZI_keysDown BYTE 256 DUP(?) ; keysDown[256]
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ZI_keysDownAlready BYTE 256 DUP(?) ; keysDownAlready[256]
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.code
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; ZeroInput_Update (= Input::Handle)
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; Polls GetAsyncKeyState(0x01) and updates mouseDown[0].
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;
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; In: none
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; Out: none
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; Frame: 0 pushes + sub 28h -> RSP = 8-40 = -32 = 0
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ZeroInput_Update PROC
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sub rsp, 28h
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mov ecx, 1 ; VK_LBUTTON = 0x01
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call GetAsyncKeyState
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test ax, ax
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jz @@mouse_up
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mov BYTE PTR [ZI_mouseDown], 1
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jmp @@done
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@@mouse_up:
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mov BYTE PTR [ZI_mouseDown], 0
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@@done:
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add rsp, 28h
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ret
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ZeroInput_Update ENDP
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; ZeroInput_IsMouseClicked
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; In: ECX = button index (0-4)
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; EDX = element_id (0-255)
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; R8B = repeat (bool)
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; Out: AL = 1 if clicked, 0 otherwise
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;
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; Logic:
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; if mouseDown[button] is set:
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; if !mouseDownAlready[element_id]: set it, return true
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; if repeat: return true
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; else:
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; clear mouseDownAlready[element_id]
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; return false
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;
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; Frame: 0 pushes + sub 28h -> RSP = 0
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ZeroInput_IsMouseClicked PROC
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sub rsp, 28h
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; Check mouseDown[button]
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mov eax, ecx ; button index (zero-extends rax)
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lea rcx, [ZI_mouseDown] ; RIP-relative base -> rcx
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movzx eax, BYTE PTR [rcx + rax] ; mouseDown[button]
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test al, al
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jz @@clear_already ; not pressed -> clear + return false
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; mouseDown[button] is set - check mouseDownAlready[element_id]
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mov ecx, edx ; element_id (zero-extends rcx)
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lea rax, [ZI_mouseDownAlready] ; RIP-relative base -> rax
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movzx eax, BYTE PTR [rax + rcx] ; mouseDownAlready[element_id]
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test al, al
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jnz @@check_repeat ; already marked -> check repeat
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; First press: set mouseDownAlready[element_id] = true, return true
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lea rax, [ZI_mouseDownAlready]
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mov BYTE PTR [rax + rcx], 1
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mov al, 1
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jmp @@done
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@@check_repeat:
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movzx eax, r8b ; AL = repeat flag
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jmp @@done
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@@clear_already:
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; Mouse is not down: clear mouseDownAlready[element_id]
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mov ecx, edx ; element_id (zero-extends rcx)
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lea rax, [ZI_mouseDownAlready]
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mov BYTE PTR [rax + rcx], 0
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xor al, al
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@@done:
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add rsp, 28h
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ret
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ZeroInput_IsMouseClicked ENDP
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; ZeroInput_IsKeyPressed
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; In: ECX = key code (0-255)
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; DL = repeat (bool)
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; Out: AL = 1 if pressed, 0 otherwise
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;
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; Frame: 0 pushes + sub 28h -> RSP = 0
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ZeroInput_IsKeyPressed PROC
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sub rsp, 28h
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mov r9d, ecx ; save key index (zero-extends r9)
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lea rcx, [ZI_keysDown] ; RIP-relative base -> rcx
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movzx eax, BYTE PTR [rcx + r9] ; keysDown[key]
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test al, al
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jz @@clear_already
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lea rax, [ZI_keysDownAlready] ; RIP-relative base -> rax
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movzx eax, BYTE PTR [rax + r9] ; keysDownAlready[key]
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test al, al
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jnz @@check_repeat
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lea rax, [ZI_keysDownAlready]
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mov BYTE PTR [rax + r9], 1
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mov al, 1
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jmp @@done
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@@check_repeat:
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movzx eax, dl ; AL = repeat flag
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jmp @@done
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@@clear_already:
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lea rax, [ZI_keysDownAlready]
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mov BYTE PTR [rax + r9], 0
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xor al, al
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@@done:
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add rsp, 28h
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ret
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ZeroInput_IsKeyPressed ENDP
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END |