kolibrios/kernel/branches/gfx_kernel/vmodeint.inc

48 lines
1.2 KiB
PHP
Raw Normal View History

;
; Call of videomode driver's functions
;
; (Add in System function 21 (and/or 26) as a subfunction 13)
;
; Author: Trans
; Date: 19.07.2003
;
; Include in MeOS kernel and compile with FASM
;
uglobal
old_screen_width dd ?
old_screen_height dd ?
endg
cmp eax,13 ; CALL VIDEOMODE DRIVER FUNCTIONS
jne .no_vmode_drv_access
pushd [0x0000fe00] [0x0000fe04]
popd [old_screen_height] [old_screen_width]
or eax,-1 ; If driver is absent then eax does not change
call 0x760100 ; Entry point of video driver
mov [esp+36],eax
mov [esp+24],ebx
mov [esp+32],ecx
; mov [esp+28],edx
mov eax,[old_screen_width]
mov ebx,[old_screen_height]
sub eax,[0x0000fe00]
jnz @f
sub ebx,[0x0000fe04]
jz .resolution_wasnt_changed
jmp .lp1
@@: sub ebx,[0x0000fe04]
.lp1: sub [screen_workarea.right],eax
sub [screen_workarea.bottom],ebx
call repos_windows
mov eax, 0
mov ebx, 0
mov ecx, [0xfe00]
mov edx, [0xfe04]
call [calculatescreen]
.resolution_wasnt_changed:
ret
.no_vmode_drv_access: