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* implemented the viewport adjustment in asm instead of pascal in the asm

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version of the PutPixel320 routine

git-svn-id: trunk@40918 -
This commit is contained in:
nickysn 2019-01-19 17:24:24 +00:00
parent 6648bacec6
commit 1e0a811aad
1 changed files with 2 additions and 2 deletions
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4
packages/graph/src/msdos/graph.pp
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@ -2248,8 +2248,6 @@ End;
if (Y < 0) or (Y > ViewHeight) then if (Y < 0) or (Y > ViewHeight) then
exit; exit;
end; end;
X:= X + StartXViewPort;
Y:= Y + StartYViewPort;
asm asm
{$ifdef FPC_MM_HUGE} {$ifdef FPC_MM_HUGE}
mov ax, SEG SegA000 mov ax, SEG SegA000
@ -2260,6 +2258,8 @@ End;
{$endif FPC_MM_HUGE} {$endif FPC_MM_HUGE}
mov ax, [Y] mov ax, [Y]
mov di, [X] mov di, [X]
add ax, [StartYViewPort]
add di, [StartXViewPort]
xchg ah, al { The value of Y must be in AH } xchg ah, al { The value of Y must be in AH }
add di, ax add di, ax
shr ax, 1 shr ax, 1