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XLIB2.ASM
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Assembly Source File
|
1994-06-18
|
75KB
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4,782 lines
; ***************************************************************************
; ** XLibPas v2.0 **
; ** for Borland Pascal 7.0 **
; ** by **
; ** Tristan Tarrant **
; ***************************************************************************
; ** Credits : **
; ** Michael Abrash - Concepts, Algorithms **
; ** Themie Gouthas - Main code and implementation **
; ** Matthew MacKenzie - Compiled Bitmaps, Circles, etc. **
; ** Tore Bastiansen - Virtual VSync Handler **
; ***************************************************************************
.MODEL TPASCAL
.386
LOCALS
include xlib2.inc
.DATA
OldHandlerSeg dw ?
OldHandlerOffs dw ?
OldHandlerMask dw ?
OldX dw ?
OldY dw ?
OldScrnOffs dw ?
level dw ?
gencount dw ?
AdjustedOffs dw ?
p1xt dw ?
p1yt dw ?
p2xt dw ?
p2yt dw ?
p4xt dw ?
p4yt dw ?
p5xt dw ?
p5yt dw ?
c1xt dw ?
c1yt dw ?
c2xt dw ?
c2yt dw ?
xdiff dw ?
ydiff dw ?
moveline dw ?
stepper dw ?
bptemp dw ?
Colort dw ?
TicksPerSecond dw ?
VsyncIntTicks label dword
VsyncIntTicksLo dw ?
VsyncIntTicksHi dw ?
VsyncPeriod dw ? ;Time (in clicks) between each vsync
;1 click = 1.193 microseconds
ClockRate dw ? ;Clock rate (in clicks) for timer 0
ClockCounter dw ? ;Counts total clicks modulo 65536
UserVsyncHandler label dword ;Pointer to user routine called
UserVsyncOffs dw ? ;called once each vsync period.
UserVsyncSeg dw ?
InUserHandler dw ?
db 100h dup(?)
LocalStack label byte ;Local stack for user handler
StackSeg dw ?
StackPtr dw ?
ElapsedVrts dw ?
VrtsToSkip dw ?
MouseVSyncHandler dd ?
.CODE
XSetMode PROC FAR Mode : Word, WidthInPixels : Word
mov InGraphics,0
mov ErrorValue,0
mov DoubleScanFlag,0
mov CurrXMode,0
mov ScrnPhysicalByteWidth,0
mov ScrnPhysicalPixelWidth,0
mov ScrnPhysicalHeight,0
mov SplitScrnOffs,0
mov SplitScrnScanLine,0
mov SplitScrnVisibleHeight,0
mov SplitScrnActive,0
mov Page0Offs,0
mov Page1Offs,0
mov Page2Offs,0
mov ScrnLogicalByteWidth,0
mov ScrnLogicalPixelWidth,0
mov ScrnLogicalHeight,0
mov MaxScrollX,0
mov MaxScrollY,0
mov DoubleBufferActive,0
mov VisiblePageIdx,0
mov HiddenPageOffs,0
mov VisiblePageOffs,0
mov NonVisualOffs,0
mov TopClip,0
mov BottomClip,0
mov LeftClip,0
mov RightClip,0
mov PhysicalStartPixelX,0
mov PhysicalStartByteX,0
mov PhysicalStartY,0
IFDEF _DPMI_
mov ax,__AHIncr
mov SelectorInc,ax
mov ax, __0000H
mov Seg0000,ax
mov ax, __A000H
ELSE
mov ax, 0A000h
ENDIF
mov ScreenSeg,ax
cld
mov ax,ds
mov es,ax
mov cx,mode
cmp cx,LastXMode
jle @@ValidMode
mov InGraphics,0
mov ax,-1
jmp @@Done
@@ValidMode:
mov CurrXMode,cx
mov InGraphics,1
xor al,al
cmp cx,3
jg @@SetDoubleScanFlag
mov al,1
@@SetDoubleScanFlag:
mov DoubleScanFlag,al
push cx
mov ax,13h
int 10h
pop cx
mov dx,ScIndex
mov ax,0604h
out dx,ax
mov ax,0100h
out dx,ax
mov bx,offset ModeTable
shl cx,1
add bx,cx
mov si, word ptr [bx]
lodsb
or al,al
jz @@DontSetDot
mov dx,MISCOUTPUT
out dx,al
@@DontSetDot:
mov dx,ScIndex
mov ax,0300h
out dx,ax
mov dx,CrtcIndex
mov al,11h
out dx,al
inc dx
in al,dx
and al,07fh
out dx,al
dec dx
cld
xor cx,cx
lodsb
mov cl,al
@@SetCRTParmsLoop:
lodsw
out dx,ax
loop @@SetCRTParmsLoop
mov dx,ScIndex
mov ax,0f02h
out dx,ax
mov ax,ScreenSeg
mov es,ax
sub di,di
sub ax,ax
mov cx,8000h
rep stosw
lodsw
mov ScrnPhysicalPixelWidth,ax
mov SplitScrnScanLine,ax
mov bx,ax
shr ax,2
mov ScrnPhysicalByteWidth,ax
lodsw
mov ScrnPhysicalHeight,ax
mov cx,widthinpixels
mov dx,CrtcIndex
mov al,CRTCOFFSET
out dx,al
inc dx
mov ax,cx
cmp ax,ScrnPhysicalPixelWidth
jge @@ValidLogicalWidth
mov ax,bx
@@ValidLogicalWidth:
shr ax,3
out dx,al
shl ax,1
mov bx,ax
mov ScrnLogicalByteWidth,ax
mov RightClip,ax
sub ax,ScrnPhysicalByteWidth
shl ax,2
mov MaxScrollX,ax
mov ax,bx
shl ax,2
mov ScrnLogicalPixelWidth,ax
mov cx,ax
mov ax,0ffffh
sub dx,dx
div bx
mov ScrnLogicalHeight,ax
mov BottomClip,ax
sub ax,ScrnPhysicalHeight
mov MaxScrollY,ax
mov ax,cx
mov ax,ScrnLogicalByteWidth
mul ScrnPhysicalHeight
mov NonVisualOffs,ax
@@Done:
mov ax, 0CB00h
int 10h
ret
XSetMode ENDP
XSelectDefaultPlane PROC FAR Plane : Byte
mov cl,Plane
and cl,011b
mov ax,0100h + MapMask
shl ah,cl
mov dx,ScIndex
out dx,ax
mov ah,cl
mov al,ReadMap
mov dx,GcIndex
out dx,ax
ret
XSelectDefaultPlane ENDP
XSetSplitscreen PROC FAR Line : Word
xor si,si
cmp DoubleBufferActive,0
jne @@error
cmp SplitScrnActive,0
je @@NotPreviouslyCalled
@@error:
mov ErrorValue,ERROR
ret
@@NotPreviouslyCalled:
mov dx,InputStatus0
in al,dx
mov al,ACMODECONTROL+20h
mov dx,ACINDEX
out dx,al
inc dx
in al,dx
or al,20h
dec dx
out dx,al
mov PhysicalStartByteX,ax
mov PhysicalStartPixelX,ax
mov PhysicalStartY,ax
mov SplitScrnActive,1
mov ax,Line
jns @@NotNeg
mov ax,0
@@NotNeg:
mov SplitScrnScanLine,ax
or DoubleScanFlag,0
jz @@NotDoubleScanned
shl ax,1
dec ax
@@NotDoubleScanned:
mov bx,ax
mov dx,InputStatus0
@@WaitNotVsync:
in al,dx
test al,08h
jnz @@WaitNotVsync
@@WaitVsync:
in al,dx
test al,08h
jz @@WaitVsync
cli
mov dx,CrtcIndex
mov ah,bl
mov al,LINECOMPARE
out dx,ax
mov ah,bh
and ah,1
shl ah,4
mov al,Overflow
out dx,al
inc dx
in al,dx
and al, not 10h
or al,ah
out dx,al
dec dx
mov ah,bh
and ah,2
ror ah,3
mov al,MAXSCANLINE
out dx,al
inc dx
in al,dx
and al, not 40h
or al,ah
out dx,al
sti
mov ax,ScrnPhysicalHeight
sub ax,SplitScrnScanLine
mov SplitScrnVisibleHeight,ax
mov bx,ScrnLogicalByteWidth
mul bx
mov Page0Offs,ax
mov Page1Offs,ax
mov Page2Offs,ax
mov cx,0ffffh
sub cx,ax
xchg cx,ax
sub dx,dx
div bx
mov ScrnLogicalHeight,ax
cmp ax,BottomClip
jle @@BottomClipOK
mov BottomClip,ax
@@BottomClipOK:
sub ax,SplitScrnScanLine
mov MaxScrollY,ax
xchg cx,ax
mov bh,al
mov ch,ah
mov bl,ADDRLOW
mov cl,ADDRHIGH
and si,0003h
mov ah,byte ptr PelPanMask[si]
mov al,PELPANNING+20h
mov si,ax
; VSync Handler stuff
cmp VSyncHandlerActive, TRUE
jne @@NoVsyncHandler
@@WaitLast:
cmp StartAddressFlag,0
jne @@WaitLast
cli
mov WaitingStartLow,bx
mov WaitingStartHigh,cx
mov WaitingPelPan,si
mov StartAddressFlag,1
sti
jmp short @@Return
; End VSync Handler stuff
@@NoVsyncHandler:
mov dx,InputStatus0
@@WaitDE:
in al,dx
test al,01h
jnz @@WaitDE
mov dx,CrtcIndex
mov ax,bx
cli
out dx,ax
mov ax,cx
out dx,ax
sti
mov dx,InputStatus0
@@WaitVS:
in al,dx
test al,08h
jz @@WaitVS
mov dx,ACINDEX
mov ax,si
cli
out dx,al
mov al,ah
out dx,al
sti
@@Return:
mov ErrorValue,OK
ret
XSetSplitScreen ENDP
XSetStartAddr PROC FAR X : Word, Y : Word
mov si,x
mov ax,ScrnLogicalByteWidth
mov cx,y
mul cx
cmp DoubleBufferActive,1
je @@PageResolution
cmp TripleBufferActive,1
je @@PageResolution
@@PageFlipEntry1:
add ax,Page0Offs
jmp @@AddColumn
@@PageFlipEntry2:
mov PhysicalStartPixelX,si
mov PhysicalStartY,cx
@@PageResolution:
add ax,VisiblePageOffs
@@AddColumn:
mov cx,si
shr cx,2
mov PhysicalStartByteX,cx
add ax,cx
mov bh,al
mov ch,ah
@@StartAddrEntry:
mov bl,ADDRLOW
mov cl,ADDRHIGH
and si,0003h
mov ah,byte ptr PelPanMask[si]
mov al,PELPANNING+20h
mov si,ax
; VSync Handler stuff
cmp VSyncHandlerActive, TRUE
jne @@NoVsyncHandler
@@WaitLast:
cmp StartAddressFlag,0
jne @@WaitLast
cli
mov WaitingStartLow,bx
mov WaitingStartHigh,cx
mov WaitingPelPan,si
mov StartAddressFlag,1
sti
jmp short @@Return
; End VSync Handler stuff
@@NoVsyncHandler:
mov dx,InputStatus0
@@WaitDE:
in al,dx
test al,01h
jnz @@WaitDE
mov dx,CrtcIndex
mov ax,bx
cli
out dx,ax
mov ax,cx
out dx,ax
sti
mov dx,InputStatus0
@@WaitVS:
in al,dx
test al,08h
jz @@WaitVS
mov dx,ACINDEX
mov ax,si
cli
out dx,al
mov al,ah
out dx,al
sti
@@Return:
mov ErrorValue,OK
ret
XSetStartAddr ENDP
XHideSplitscreen PROC FAR
cmp SplitScrnActive,1
je @@SplitScreenEnabled
@@error:
mov ErrorValue,ERROR
jmp @@Done
@@SplitScreenEnabled:
cmp CurrXMode,4
jg @@error
mov bx,ScrnPhysicalHeight
mov ax,ScrnLogicalHeight
sub ax,bx
mov MaxScrollY,ax
xor ax,ax
mov SplitScrnVisibleHeight,ax
or DoubleScanFlag,0
jz @@NotDoubleScanned
shl bx,1
dec bx
@@NotDoubleScanned:
cmp VSyncHandlerActive,1
je @@VSyncHandling
mov dx,InputStatus0
@@WaitNotVsync:
in al,dx
test al,08h
jnz @@WaitNotVsync
@@WaitVsync:
in al,dx
test al,08h
jz @@WaitVsync
jmp short @@SetRegs
@@VSyncHandling:
cmp StartAddressFlag,0
jne @@VSyncHandling
mov StartAddressFlag,1
@@SetRegs:
cli
mov dx,CrtcIndex
mov ah,bl
mov al,LINECOMPARE
out dx,ax
mov ah,bh
and ah,1
shl ah,4
mov al,Overflow
out dx,al
inc dx
in al,dx
and al, not 10h
or al,ah
out dx,al
dec dx
mov ah,bh
and ah,2
ror ah,3
mov al,MAXSCANLINE
out dx,al
inc dx
in al,dx
and al, not 40h
or al,ah
out dx,al
sti
@@done:
mov ErrorValue,OK
ret
XHideSplitScreen ENDP
XShowSplitscreen PROC FAR
cmp SplitScrnActive,1
je @@SplitScreenEnabled
@@error:
mov ErrorValue,ERROR
jmp @@Done
@@SplitScreenEnabled:
cmp CurrXMode,4
jg @@error
mov bx,SplitScrnScanLine
mov ax,ScrnLogicalHeight
sub ax,bx
mov MaxScrollY,ax
mov ax,ScrnPhysicalHeight
sub ax,bx
mov SplitScrnVisibleHeight,ax
or DoubleScanFlag,0
jz @@NotDoubleScanned
shl bx,1
dec bx
@@NotDoubleScanned:
cmp VsyncHandlerActive,1
je @@VSyncHandling
mov dx,InputStatus0
@@WaitNotVsync:
in al,dx
test al,08h
jnz @@WaitNotVsync
@@WaitVsync:
in al,dx
test al,08h
jz @@WaitVsync
jmp short @@SetRegs
@@VSyncHandling:
cmp StartAddressFlag,0
jne @@VSyncHandling
mov StartAddressFlag,1
@@SetRegs:
cli
mov dx,CrtcIndex
mov ah,bl
mov al,LINECOMPARE
out dx,ax
mov ah,bh
and ah,1
shl ah,4
mov al,Overflow
out dx,al
inc dx
in al,dx
and al, not 10h
or al,ah
out dx,al
dec dx
mov ah,bh
and ah,2
ror ah,3
mov al,MAXSCANLINE
out dx,al
inc dx
in al,dx
and al, not 40h
or al,ah
out dx,al
sti
@@Done:
mov ErrorValue,0
ret
XShowSplitScreen ENDP
XAdjustSplitScreen PROC FAR Line : Word
cmp SplitScrnActive,1
je @@SplitScreenEnabled
@@error:
mov ErrorValue,ERROR
jmp @@Done
@@SplitScreenEnabled:
cmp CurrXMode,4
jg @@error
mov bx,Line
cmp bx,SplitScrnScanLine
js @@Done
@@ValidScanLine:
mov ax,ScrnLogicalHeight
sub ax,bx
mov MaxScrollY,ax
mov ax,ScrnPhysicalHeight
sub ax,bx
mov SplitScrnVisibleHeight,ax
or DoubleScanFlag,0
jz @@NotDoubleScanned
shl bx,1
dec bx
@@NotDoubleScanned:
cmp VsyncHandlerActive,1
je @@VsyncHandling
mov dx,InputStatus0
@@WaitNotVsync:
in al,dx
test al,08h
jnz @@WaitNotVsync
@@WaitVsync:
in al,dx
test al,08h
jz @@WaitVsync
jmp short @@SetRegs
@@VsyncHandling:
cmp StartAddressFlag,0
jne @@VSyncHandling
mov StartAddressFlag,2
@@SetRegs:
cli
mov dx,CrtcIndex
mov ah,bl
mov al,LINECOMPARE
out dx,ax
mov ah,bh
and ah,1
shl ah,4
mov al,Overflow
out dx,al
inc dx
in al,dx
and al, not 10h
or al,ah
out dx,al
dec dx
mov ah,bh
and ah,2
ror ah,3
mov al,MAXSCANLINE
out dx,al
inc dx
in al,dx
and al, not 40h
or al,ah
out dx,al
sti
@@Done:
mov ErrorValue,OK
ret
XAdjustSplitScreen ENDP
XSetDoubleBuffer PROC FAR PageHeight : Word
cmp DoubleBufferActive,0
je @@OkToContinue
@error:
mov ErrorValue,ERROR
ret
@@OkToContinue:
mov VisiblePageIdx,0
mov ax,ScrnLogicalHeight
shr ax,1
mov bx,PageHeight
cmp ax,bx
js @@InvalidHeight
mov ax,bx
@@InvalidHeight:
mov ScrnLogicalHeight,ax
cmp ax,BottomClip
jle @@BottomClipOK
mov BottomClip,ax
@@BottomClipOK:
mov dx,ax
mul ScrnLogicalByteWidth
mov cx,ax
mov bx,Page0Offs
mov VisiblePageOffs,bx
add ax,bx
mov Page1Offs,ax
mov HiddenPageOffs,ax
add ax,cx
mov NonVisualOffs,ax
mov DoubleBufferActive,1
mov ax,dx
sub ax,ScrnPhysicalHeight
add ax,SplitScrnVisibleHeight
mov MaxScrollY,ax
mov ax,dx
mov ErrorValue,OK
ret
XSetDoubleBuffer ENDP
XSetTripleBuffer PROC FAR PageHeight : word
cmp DoubleBufferActive,0
jne @@Error
cmp TripleBufferActive,0
je @@OkToContinue
@@Error:
mov ErrorValue,ERROR
jmp @@Done
@@OkToContinue:
mov VisiblePageIdx,0
mov ax,ScrnLogicalHeight
mov bx,3
xor dx,dx
idiv bx
mov bx,PageHeight
cmp ax,bx
js @@InvalidHeight
mov ax,bx
@@InvalidHeight:
mov ScrnLogicalHeight,ax
cmp ax,BottomClip
jle @@BottomClipOK
mov BottomClip,ax
@@BottomClipOK:
push ax
mul ScrnLogicalByteWidth
mov cx,ax
mov bx,Page0Offs
mov VisiblePageOffs,bx
add ax,bx
mov Page1Offs,ax
mov HiddenPageOffs,ax
add ax,cx
mov Page2Offs,ax
mov WaitingPageOffs,ax
add ax,cx
mov NonVisualOffs,ax
mov TripleBufferActive,1
pop ax
sub ax,ScrnPhysicalHeight
add ax,SplitScrnVisibleHeight
mov MaxScrollY,ax
mov ax,dx
mov ErrorValue,OK
@@Done:
ret
XSetTripleBuffer ENDP
XPageFlip PROC FAR X : Word, Y : Word
mov si,x
mov ax,ScrnLogicalByteWidth
mov cx,y
mul cx
cmp DoubleBufferActive,1
je @@DoubleBuffer
cmp TripleBufferActive,1
jne @@PageFlipEntry1
mov bx,HiddenPageOffs
xchg bx,VisiblePageOffs
xchg bx,WaitingPageOffs
mov HiddenPageOffs,bx
mov bx, VisiblePageIdx
inc bx
cmp bx,3
jne @@IdxOk
xor bx,bx
@@IdxOk:
mov VisiblePageIdx,bx
jmp @@PageFlipEntry2
@@DoubleBuffer:
mov bx,HiddenPageOffs
xchg bx,VisiblePageOffs
xchg HiddenPageOffs,bx
xor VisiblePageIdx,01h
jmp @@PageFlipEntry2
@@PageFlipEntry1:
add ax,Page0Offs
jmp @@AddColumn
@@PageFlipEntry2:
mov PhysicalStartPixelX,si
mov PhysicalStartY,cx
@@PageResolution:
add ax,VisiblePageOffs
@@AddColumn:
mov cx,si
shr cx,2
mov PhysicalStartByteX,cx
add ax,cx
mov bh,al
mov ch,ah
@@StartAddrEntry:
mov bl,ADDRLOW
mov cl,ADDRHIGH
and si,0003h
mov ah,byte ptr PelPanMask[si]
mov al,PELPANNING+20h
mov si,ax
; VSync Handler stuff
cmp VSyncHandlerActive, TRUE
jne @@NoVsyncHandler
@@WaitLast:
cmp StartAddressFlag,0
jne @@WaitLast
cli
mov WaitingStartLow,bx
mov WaitingStartHigh,cx
mov WaitingPelPan,si
mov StartAddressFlag,1
sti
jmp short @@Return
; End VSync Handler stuff
@@NoVsyncHandler:
mov dx,InputStatus0
@@WaitDE:
in al,dx
test al,01h
jnz @@WaitDE
mov dx,CrtcIndex
mov ax,bx
cli
out dx,ax
mov ax,cx
out dx,ax
sti
mov dx,InputStatus0
@@WaitVS:
in al,dx
test al,08h
jz @@WaitVS
mov dx,ACINDEX
mov ax,si
cli
out dx,al
mov al,ah
out dx,al
sti
@@Return:
mov ErrorValue,OK
ret
XPageFlip ENDP
XSetClipRect PROC FAR Left : Word, Top : Word, Right : Word, Bottom : Word
mov ax,left
mov bx,right
cmp bx,ax
jns @@CorrectXOrder
xchg bx,ax
@@CorrectXOrder:
mov LeftClip,ax
mov RightClip,bx
mov ax,top
mov bx,bottom
cmp bx,ax
jns @@CorrectYOrder
xchg bx,ax
@@CorrectYOrder:
mov TopClip,ax
mov BottomClip,bx
ret
XSetClipRect ENDP
XTextMode PROC FAR
mov ax,03h
int 10h
ret
XTextMode ENDP
XWaitVSync PROC FAR
mov dx,InputStatus0
@@WaitNotVsync:
in al,dx
test al,08h
jnz @@WaitNotVsync
@@WaitVsync:
in al,dx
test al,08h
jz @@WaitVsync
ret
XWaitVSync ENDP
XLine PROC FAR x1 : Word, y1 : Word, x2 : Word, y2 : Word, Color : Word,\
PgOffs : Word
LOCAL vertincr : Word, incr1 : Word, incr2 : Word, routine : Word
mov ax,ScreenSeg
mov es,ax
mov dx,ScIndex
mov si,ScrnLogicalByteWidth
mov cx,x2
sub cx,x1
jz @@VertLine
jns @@L01
neg cx
mov bx,x2
xchg bx,x1
mov x2,bx
mov bx,y2
xchg bx,y1
mov y2,bx
@@L01:
mov bx,y2
sub bx,y1
jnz @@skip
jmp @@HorizLine
@@skip:
jns @@L03
neg bx
neg si
@@L03:
mov vertincr,si
mov routine,offset @@LoSlopeLine
cmp bx,cx
jle @@L04
mov routine,offset @@HiSlopeLine
xchg bx,cx
@@L04:
shl bx,1
mov incr1,bx
sub bx,cx
mov si,bx
sub bx,cx
mov incr2,bx
push cx
mov ax,y1
mov bx,x1
mov cl,bl
push dx
mov dx,ScrnLogicalByteWidth
mul dx
pop dx
shr bx,2
add bx,ax
add bx,PgOffs
and cl,3
mov di,bx
mov al,1
shl al,cl
mov ah,al
shl al,4
add ah,al
mov bl,ah
pop cx
inc cx
jmp routine
@@VertLine:
mov ax,y1
mov bx,y2
mov cx,bx
sub cx,ax
jge @@L31
neg cx
mov ax,bx
@@L31:
inc cx
mov bx,x1
push cx
mov cl,bl
push dx
mov dx,ScrnLogicalByteWidth
mul dx
pop dx
shr bx,2
add bx,ax
add bx,PgOffs
and cl,3
mov ah,1
shl ah,cl
mov al,MapMask
out dx,ax
pop cx
mov ax, word ptr [Color]
@@L32:
mov es:[bx],al
add bx,si
loop @@L32
jmp @@Lexit
@@HorizLine:
push ds
mov ax,y1
mov bx,x1
mov cl,bl
push dx
mov dx,ScrnLogicalByteWidth
mul dx
pop dx
shr bx,2
add bx,ax
add bx,PgOffs
and cl,3
mov di,bx
mov dl,00fh
shl dl,cl
mov cx,x2
and cl,3
mov dh,00eh
shl dh,cl
not dh
mov ax,x2
mov bx,x1
shr ax,2
shr bx,2
mov cx,ax
sub cx,bx
mov ax,dx
mov dx,SCINDEX
mov bx, [Color]
or cx,cx
jnz @@L42
and ah,al
jmp @@L44
@@L42:
push ax
mov ah,al
mov al,MAPMASK
out dx,ax
mov al,bl
stosb
dec cx
@@L43:
mov ah,0Fh
mov al,MAPMASK
out dx,ax
mov al,bl
rep stosb
pop ax
@@L44:
mov al,MAPMASK
out dx, ax
mov byte ptr es:[di],bl
pop ds
jmp @@Lexit
@@LoSlopeLine:
mov al,MAPMASK
mov bh,byte ptr [Color]
@@L10:
mov ah,bl
@@L11:
or ah,bl
rol bl,1
jc @@L14
or si,si
jns @@L12
add si,incr1
loop @@L11
out dx,ax
mov es:[di],bh
jmp @@Lexit
@@L12:
add si,incr2
out dx,ax
mov es:[di],bh
add di,vertincr
loop @@L10
jmp @@Lexit
@@L14:
out dx,ax
mov es:[di],bh
inc di
or si,si
jns @@L15
add si,incr1
loop @@L10
jmp @@Lexit
@@L15:
add si,incr2
add di,vertincr
loop @@L10
jmp @@Lexit
@@HiSlopeLine:
mov bx,vertincr
mov al,MAPMASK
@@L21:
out dx,ax
push ax
mov ax,Color
mov es:[di],al
pop ax
add di,bx
@@L22:
or si,si
jns @@L23
add si,incr1
loop @@L21
jmp @@Lexit
@@L23:
add si,incr2
rol ah,1
adc di,0
@@lx21: loop @@L21
@@Lexit:
ret
XLine ENDP
XPutPix PROC FAR X : Word, Y : Word, PgOfs : Word, Color : Word
mov ax,ScrnLogicalByteWidth
mul Y
mov bx,X
shr bx,2
add bx,ax
add bx,PgOfs
mov ax,SCREENSEG
mov es,ax
mov cl,byte ptr X
and cl,011b
mov ax,0100h + MAPMASK
shl ah,cl
mov dx,SCINDEX
out dx,ax
mov al,byte ptr Color
mov es:[bx],al
ret
XPutPix ENDP
XGetPix PROC FAR x : Word, y : Word, PageBase : Word
mov ax,ScrnLogicalByteWidth
mul Y
mov bx,X
shr bx,1
shr bx,1
add bx,ax
add bx,PageBase
mov ax,SCREENSEG
mov es,ax
mov ah,byte ptr X
and ah,011b
mov al,READMAP
mov dx,GCINDEX
out dx,ax
mov al,es:[bx]
sub ah,ah
ret
XGetPix ENDP
XRectFill PROC FAR StartX : Word, StartY : Word, EndX : Word, EndY : Word,\
PageBase : Word, Color : Word
push bp
cld
mov ax,ScrnLogicalByteWidth
mul StartY
mov di,StartX
shr di,1
shr di,1
add di,ax
add di,PageBase
mov ax,SCREENSEG
mov es,ax
mov dx,SCINDEX
mov al,MAPMASK
out dx,al
inc dx
mov si,StartX
and si,0003h
mov bh,byte ptr LeftClipPlaneMask[si]
mov si,EndX
and si,0003h
mov bl,byte ptr RightClipPlaneMask[si]
mov cx,EndX
mov si,StartX
cmp cx,si
jle @@FillDone
dec cx
and si,not 011b
sub cx,si
shr cx,1
shr cx,1
jnz @@MasksSet
and bh,bl
@@MasksSet:
mov si,EndY
sub si,StartY
jle @@FillDone
mov ah,byte ptr Color
mov bp,ScrnLogicalByteWidth
sub bp,cx
dec bp
@@FillRowsLoop:
push cx
mov al,bh
out dx,al
mov al,ah
stosb
dec cx
js @@FillLoopBottom
jz @@DoRightEdge
mov al,00fh
out dx,al
mov al,ah
rep stosb
@@DoRightEdge:
mov al,bl
out dx,al
mov al,ah
stosb
@@FillLoopBottom:
add di,bp
pop cx
dec si
jnz @@FillRowsLoop
@@FillDone:
pop bp
ret
XRectFill ENDP
XRectPattern PROC FAR StartX : Word, StartY : Word, EndX : Word, EndY : Word,\
PageBase : Word, Pattern : DWord
LOCAL NextScanOffset : Word, RectAddrWidth : Word, Height : word
push ds
cld
mov ax,SCREENSEG
mov es,ax
lds si,Pattern
mov di,PATTERNBUFFER
mov dx,SCINDEX
mov al,MAPMASK
out dx,al
inc dx
mov cx,4
@@DownloadPatternLoop:
mov al,1
out dx,al
movsb
dec di
mov al,2
out dx,al
movsb
dec di
mov al,4
out dx,al
movsb
dec di
mov al,8
out dx,al
movsb
loop @@DownloadPatternLoop
pop ds
mov dx,GCINDEX
mov ax,00000h+BITMASK
out dx,ax
mov ax,StartY
mov si,ax
and si,011b
add si,PATTERNBUFFER
mov dx,ScrnLogicalByteWidth
mul dx
mov di,StartX
mov bx,di
shr di,1
shr di,1
add di,ax
add di,PageBase
and bx,0003h
mov ah,byte ptr LeftClipPlaneMask[bx]
mov bx,EndX
and bx,0003h
mov al,byte ptr RightClipPlaneMask[bx]
mov bx,ax
mov cx,EndX
mov ax,StartX
cmp cx,ax
jle @@FillDone
dec cx
and ax,not 011b
sub cx,ax
shr cx,1
shr cx,1
jnz @@MasksSet
and bh,bl
@@MasksSet:
mov ax,EndY
sub ax,StartY
jle @@FillDone
mov Height,ax
mov ax,ScrnLogicalByteWidth
sub ax,cx
dec ax
mov NextScanOffset,ax
mov RectAddrWidth,cx
mov dx,SCINDEX+1
@@FillRowsLoop:
mov cx,RectAddrWidth
mov al,es:[si]
inc si
jnz @@NoWrap
sub si,4
@@NoWrap:
mov al,bh
out dx,al
stosb
dec cx
js @@FillLoopBottom
jz @@DoRightEdge
mov al,00fh
out dx,al
rep stosb
@@DoRightEdge:
mov al,bl
out dx,al
stosb
@@FillLoopBottom:
add di,NextScanOffset
dec word ptr Height
jnz @@FillRowsLoop
@@FillDone:
mov dx,GCINDEX+1
mov al,0ffh
out dx,al
ret
XRectPattern ENDP
XCpVidPage PROC FAR SourceOffs : Word, DestOffs : Word
LOCAL ScreenSize : Word
push ds
cld
mov ax, ScrnLogicalByteWidth
mov bx, ScrnLogicalHeight
mul bx
mov ScreenSize, ax
mov ax, SCREENSEG
mov ds, ax
mov es, ax
@@PlaneLoop:
mov si, SourceOffs
mov di, DestOffs
mov ax,BITMASK
mov dx,GCINDEX
out dx,ax
mov dx,SCINDEX+1
mov al, 00fh
out dx, al
mov cx,ScreenSize
rep movsb
mov dx,GCINDEX+1
mov al,0ffh
out dx,al
pop ds
ret
XCpVidPage ENDP
XCpVidRect PROC FAR SrcStartX : Word, SrcStartY : Word, SrcEndX : Word,\
SrcEndY : Word, DestStartX : Word, DestStartY : Word,\
SrcPageBase : Word, DestPageBase : Word,\
SrcBitmapW : Word, DestBitmapW : Word
LOCAL SrcNextOffs : Word, DestNextOffs : Word, RectAddrW : Word, Height : Word
push ds
cld
mov dx,GCINDEX
mov ax,BITMASK
out dx,ax
mov ax,SCREENSEG
mov es,ax
mov ax,DestBitmapW
shr ax,2
mul DestStartY
mov di,DestStartX
shr di,2
add di,ax
add di,DestPageBase
mov ax,SrcBitmapW
shr ax,2
mul SrcStartY
mov si,SrcStartX
mov bx,si
shr si,2
add si,ax
add si,SrcPageBase
and bx,0003h
mov ah,byte ptr LeftClipPlaneMask[bx]
mov bx,SrcEndX
and bx,0003h
mov al,byte ptr RightClipPlaneMask[bx]
mov bx,ax
mov cx,SrcEndX
mov ax,SrcStartX
cmp cx,ax
jle @@CopyDone
dec cx
and ax,not 011b
sub cx,ax
shr cx,2
jnz @@MasksSet
and bh,bl
@@MasksSet:
mov ax,SrcEndY
sub ax,SrcStartY
jle @@CopyDone
mov Height,ax
mov ax,DestBitmapW
shr ax,2
sub ax,cx
dec ax
mov DestNextOffs,ax
mov ax,SrcBitmapW
shr ax,2
sub ax,cx
dec ax
mov SrcNextOffs,ax
mov RectAddrW,cx
mov dx,SCINDEX+1
mov ax,es
mov ds,ax
@@CopyRowsLoop:
mov cx,RectAddrW
mov al,bh
out dx,al
movsb
dec cx
js @@CopyLoopBottom
jz @@DoRightEdge
mov al,00fh
out dx,al
rep movsb
@@DoRightEdge:
mov al,bl
out dx,al
movsb
@@CopyLoopBottom:
add si,SrcNextOffs
add di,DestNextOffs
dec word ptr Height
jnz @@CopyRowsLoop
@@CopyDone:
mov dx,GCINDEX+1
mov al,0ffh
out dx,al
pop ds
ret
XCpVidRect ENDP
XShiftRect PROC FAR SrcLeft : Word, SrcTop : Word, SrcRight : Word,\
SrcBottom : Word, DestLeft : Word, DestTop : Word,\
ScreenOffs : Word
LOCAL widthtemp : Word
push ds
mov si, SrcLeft
shr si, 2
mov di, DestLeft
shr di, 2
mov bx, SrcRight
add bx, 3
shr bx, 2
sub bx, si
mov ax, bx
inc bx
mov widthtemp, bx
cld
cmp si, di
jge @@MovingLeft
add si, ax
add di, ax
neg bx
std
@@MovingLeft:
mov cx, ScrnLogicalByteWidth
mov ax, SrcTop
mov dx, DestTop
cmp ax, dx
jge @@MovingUp
mov ax, SrcBottom
add dx, ax
sub dx, SrcTop
neg cx
@@MovingUp:
push dx
mul ScrnLogicalByteWidth
add si, ax
pop ax
mul ScrnLogicalByteWidth
add di, ax
sub cx, bx
add si, ScreenOffs
add di, ScreenOffs
mov dx, SCINDEX
mov ax, 00f02h
out dx, ax
mov dx, GCINDEX
mov ax, BITMASK
out dx, ax
mov ax, SCREENSEG
mov es, ax
mov ds, ax
mov ah, byte ptr widthtemp
mov bx, SrcBottom
sub bx, SrcTop
mov dx, cx
xor ch, ch
@@LineLoop:
mov cl, ah
rep movsb
add si, dx
add di, dx
dec bx
jge @@LineLoop
mov dx, GCINDEX + 1
mov al, 0ffh
out dx, al
pop ds
ret
XShiftRect ENDP
XCircle PROC FAR Left : Word, Top : Word, Diameter : Word, Color : Word,\
ScreenOffs : Word
LOCAL offset0 : Word, offset1 : Word, offset2 : Word, offset3 : Word,\
offset4 : Word, offset5 : Word, offset6 : Word, offset7 : Word,\
mask0n1 : Word, mask2n3 : Word, mask4n5 : Word, mask6n7 : Word,\
shrunkradius : Word, diametereven : Word, Aerror : Word
push ds
mov di, ScrnLogicalByteWidth
xor dx, dx
mov ax, Diameter
dec ax
shr ax, 1
adc dx, 0
mov shrunkradius, ax
mov diametereven, dx
add ax, Top
mul di
add ax, ScreenOffs
mov bx, Left
mov cx, bx
mov si, bx
shr si, 2
add si, ax
mov offset6, si
and bx, 3
mov bl, byte ptr ColumnMask[bx]
mov mask6n7, bx
add cx, Diameter
dec cx
mov bx, cx
shr cx, 2
add cx, ax
mov offset2, cx
and bx, 3
mov bl, byte ptr ColumnMask[bx]
mov mask2n3, bx
cmp diametereven, 1
jne @@MiddlePlotsOverlap
add si, di
add cx, di
@@MiddlePlotsOverlap:
mov offset7, si
mov offset3, cx
mov bx, Left
add bx, shrunkradius
mov ax, Top
mul di
add ax, ScreenOffs
mov si, ax
mov ax, Diameter
dec ax
mul di
add ax, si
mov di, bx
shr di, 2
add si, di
mov offset4, si
add di, ax
mov offset5, di
and bx, 3
mov bl, byte ptr ColumnMask[bx]
mov mask4n5, bx
cmp diametereven, 1
jne @@TopAndBottomPlotsOverlap
rol bl, 1
jnc @@TopAndBottomPlotsOverlap
inc si
inc di
@@TopAndBottomPlotsOverlap:
mov offset0, si
mov offset1, di
mov mask0n1, bx
mov bx, ScrnLogicalByteWidth
mov dx, SCREENSEG
mov ds, dx
mov dx, SCINDEX
mov al, MAPMASK
out dx, al
inc dx
mov si, Diameter
inc si
mov cx, si
neg cx
add cx, 2
mov Aerror, cx
xor cx, cx
mov ah, byte ptr Color
jmp @@CircleCalc
@@NoAdvance:
mov al, byte ptr mask0n1
out dx, al
mov di, offset0
mov [di], ah
rol al, 1
mov byte ptr mask0n1, al
adc di, 0
mov offset0, di
mov di, offset1
mov [di], ah
ror al, 1
adc di, 0
mov offset1, di
mov al, byte ptr mask2n3
out dx, al
mov di, offset2
mov [di], ah
sub di, bx
mov offset2, di
mov di, offset3
mov [di], ah
add di, bx
mov offset3, di
mov al, byte ptr mask4n5
out dx, al
mov di, offset4
mov [di], ah
ror al, 1
mov byte ptr mask4n5, al
sbb di, 0
mov offset4, di
mov di, offset5
mov [di], ah
rol al, 1
sbb di, 0
mov offset5, di
mov al, byte ptr mask6n7
out dx, al
mov di, offset6
mov [di], ah
sub di, bx
mov offset6, di
mov di, offset7
mov [di], ah
add di, bx
mov offset7, di
jmp @@CircleCalc
@@Advance:
mov al, byte ptr mask0n1
out dx, al
mov di, offset0
mov [di], ah
rol al, 1
mov byte ptr mask0n1, al
adc di, bx
mov offset0, di
mov di, offset1
mov [di], ah
ror al, 1
adc di, 0
sub di, bx
mov offset1, di
mov al, byte ptr mask2n3
out dx, al
mov di, offset2
mov [di], ah
ror al, 1
mov byte ptr mask2n3, al
sbb di, bx
mov offset2, di
mov di, offset3
mov [di], ah
rol al, 1
sbb di, 0
add di, bx
mov offset3, di
mov al, byte ptr mask4n5
out dx, al
mov di, offset4
mov [di], ah
ror al, 1
mov byte ptr mask4n5, al
sbb di, 0
add di, bx
mov offset4, di
mov di, offset5
mov [di], ah
rol al, 1
sbb di, bx
mov offset5, di
mov al, byte ptr mask6n7
out dx, al
mov di, offset6
mov [di], ah
rol al, 1
mov byte ptr mask6n7, al
adc di, 0
sub di, bx
mov offset6, di
mov di, offset7
mov [di], ah
ror al, 1
adc di, bx
mov offset7, di
@@CircleCalc:
add cx, 2
mov di, Aerror
add di, cx
inc di
jl @@CircleNoError
cmp cx, si
ja @@FleeFlyFlowFum
sub si, 2
sub di, si
mov Aerror, di
jmp @@Advance
@@CircleNoError:
mov Aerror, di
jmp @@NoAdvance
@@FleeFlyFlowFum:
pop ds
ret
XCircle ENDP
XFilledCircle PROC FAR Left : Word, Top : Word, Diameter : Word,\
Color : Word, ScreenOffs : Word
LOCAL offset0 : Word, offset1 : Word, offset2 : Word, offset3 : Word,\
offset4 : Word, offset5 : Word, offset6 : Word, offset7 : Word,\
mask0n1 : Word, mask2n3 : Word, mask4n5 : Word, mask6n7 : Word,\
shrunkradius : Word, diametereven : Word, Aerror : Word,\
jumpvector : Word
cld
mov di, ScrnLogicalByteWidth
xor dx, dx
mov ax, Diameter
dec ax
shr ax, 1
adc dx, 0
mov shrunkradius, ax
mov diametereven, dx
add ax, Top
mul di
add ax, ScreenOffs
mov bx, Left
mov cx, bx
mov si, bx
shr si, 2
add si, ax
mov offset6, si
and bx, 3
mov bl, byte ptr ColumnMask[bx]
mov mask6n7, bx
add cx, Diameter
dec cx
mov bx, cx
shr cx, 2
add cx, ax
mov offset2, cx
and bx, 3
mov bl, byte ptr ColumnMask[bx]
mov mask2n3, bx
cmp diametereven, 1
jne @@MiddlePlotsOverlap
add si, di
add cx, di
@@MiddlePlotsOverlap:
mov offset7, si
mov offset3, cx
mov bx, Left
add bx, shrunkradius
mov ax, Top
mul di
add ax, ScreenOffs
mov si, ax
mov ax, Diameter
dec ax
mul di
add ax, si
mov di, bx
shr di, 2
add si, di
mov offset4, si
add di, ax
mov offset5, di
and bx, 3
mov bl, byte ptr ColumnMask[bx]
mov mask4n5, bx
cmp diametereven, 1
jne @@TopAndBottomPlotsOverlap
rol bl, 1
jnc @@TopAndBottomPlotsOverlap
inc si
inc di
@@TopAndBottomPlotsOverlap:
mov offset0, si
mov offset1, di
mov mask0n1, bx
mov bx, ScrnLogicalByteWidth
mov dx, SCREENSEG
mov es, dx
mov dx, SCINDEX
mov al, MAPMASK
out dx, al
inc dx
mov si, Diameter
inc si
mov cx, si
neg cx
add cx, 2
mov Aerror, cx
xor cx, cx
mov ah, byte ptr Color
jmp @@FilledCircleCalc
@@PlotLines:
push cx
mov di, mask0n1
and di, 0000fh
mov al, byte ptr RightMaskTable[di]
mov di, offset0
cmp di, offset4
jne @@PlotXMajorNontrivial
mov di, mask4n5
and di, 0000fh
and al, byte ptr LeftMaskTable[di]
out dx, al
mov di, offset4
mov es:[di], ah
mov di, offset5
mov es:[di], ah
jmp @@PlotYMajor
@@PlotXMajorNontrivial:
out dx, al
mov es:[di], ah
mov di, offset1
mov es:[di], ah
mov di, mask4n5
and di, 0000fh
mov al, byte ptr LeftMaskTable[di]
out dx, al
mov di, offset4
mov es:[di], ah
mov di, offset5
mov es:[di], ah
mov al, 0ffh
out dx, al
mov al, ah
inc di
mov cx, offset1
sub cx, di
push cx
shr cx, 1
rep stosw
adc cx, 0
rep stosb
mov di, offset4
inc di
pop cx
shr cx, 1
rep stosw
adc cx, 0
rep stosb
@@PlotYMajor:
mov di, mask2n3
and di, 0000fh
mov al, byte ptr RightMaskTable[di]
mov di, offset2
cmp di, offset6
jne @@PlotYMajorNontrivial
mov di, mask6n7
and di, 0000fh
and al, byte ptr LeftMaskTable[di]
out dx, al
mov di, offset6
mov es:[di], ah
mov di, offset7
mov es:[di], ah
jmp @@ClimaxOfPlot
@@PlotYMajorNontrivial:
out dx, al
mov es:[di], ah
mov di, offset3
mov es:[di], ah
mov di, mask6n7
and di, 0000fh
mov al, byte ptr LeftMaskTable[di]
out dx, al
mov di, offset6
mov es:[di], ah
mov di, offset7
mov es:[di], ah
mov al, 0ffh
out dx, al
mov al, ah
inc di
mov cx, offset3
sub cx, di
push cx
shr cx, 1
rep stosw
adc cx, 0
rep stosb
mov di, offset6
inc di
pop cx
shr cx, 1
rep stosw
adc cx, 0
rep stosb
@@ClimaxOfPlot:
pop cx
jmp [jumpvector]
@@NoAdvance:
mov al, byte ptr mask0n1
mov di, offset0
rol al, 1
mov byte ptr mask0n1, al
adc di, 0
mov offset0, di
mov di, offset1
ror al, 1
adc di, 0
mov offset1, di
mov al, byte ptr mask4n5
mov di, offset4
ror al, 1
mov byte ptr mask4n5, al
sbb di, 0
mov offset4, di
mov di, offset5
rol al, 1
sbb di, 0
mov offset5, di
mov al, byte ptr mask2n3
mov di, offset2
sub di, bx
mov offset2, di
mov di, offset3
add di, bx
mov offset3, di
mov al, byte ptr mask6n7
mov di, offset6
sub di, bx
mov offset6, di
mov di, offset7
add di, bx
mov offset7, di
jmp @@FilledCircleCalc
@@Advance:
mov al, byte ptr mask0n1
mov di, offset0
rol al, 1
mov byte ptr mask0n1, al
adc di, bx
mov offset0, di
mov di, offset1
ror al, 1
adc di, 0
sub di, bx
mov offset1, di
mov al, byte ptr mask2n3
mov di, offset2
ror al, 1
mov byte ptr mask2n3, al
sbb di, bx
mov offset2, di
mov di, offset3
rol al, 1
sbb di, 0
add di, bx
mov offset3, di
mov al, byte ptr mask4n5
mov di, offset4
ror al, 1
mov byte ptr mask4n5, al
sbb di, 0
add di, bx
mov offset4, di
mov di, offset5
rol al, 1
sbb di, bx
mov offset5, di
mov al, byte ptr mask6n7
mov di, offset6
rol al, 1
mov byte ptr mask6n7, al
adc di, 0
sub di, bx
mov offset6, di
mov di, offset7
ror al, 1
adc di, bx
mov offset7, di
@@FilledCircleCalc:
add cx, 2
mov di, Aerror
add di, cx
inc di
jl @@FilledCircleNoError
cmp cx, si
ja @@FleeFlyFlowFum
sub si, 2
sub di, si
mov Aerror, di
mov jumpvector, offset @@Advance
jmp @@PlotLines
@@FilledCircleNoError:
mov Aerror, di
mov jumpvector, offset @@NoAdvance
jmp @@PlotLines
@@FleeFlyFlowFum:
ret
XFilledCircle ENDP
XGetPalStruc PROC FAR PalBuff : DWord, NumColors : Word, StartColor : Word
cld
les di,PalBuff
mov si,StartColor
mov ax,si
stosb
mov dx,NumColors
mov al,dl
stosb
mov cx,dx
cld
cmp VSyncHandlerActive,1
je @@HandleVVH
mov dx,INPUTSTATUS0
@@WaitNotVsync:
in al,dx
test al,08h
jnz @@WaitNotVsync
@@WaitVsync:
in al,dx
test al,08h
jz @@WaitVsync
jmp short @@SkipVSync
@@HandleVVH:
cmp StartAddressFlag,0
jne @@HandleVVH
@@SkipVSync:
mov ax, si
mov dx, DACREADINDEX
cli
out dx, al
mov dx, DACDATA
mov bx, cx
shl bx, 1
add cx, bx
rep insb
sti
ret
XGetPalStruc ENDP
XGetPalRaw PROC FAR PalBuff : DWord, NumColors : Word, StartColor : Word
les di,PalBuff
mov si,StartColor
mov cx,NumColors
@@ReadPalEntry:
cld
cmp VSyncHandlerActive,1
je @@HandleVVH
mov dx,INPUTSTATUS0
@@WaitNotVsync:
in al,dx
test al,08h
jnz @@WaitNotVsync
@@WaitVsync:
in al,dx
test al,08h
jz @@WaitVsync
jmp short @@SkipVSync
@@HandleVVH:
cmp StartAddressFlag,0
jne @@HandleVVH
@@SkipVSync:
mov ax,si
mov dx,DACREADINDEX
cli
out dx,al
mov dx,DACDATA
mov bx,cx
shl bx,1
add cx,bx
rep insb
sti
ret
XGetPalRaw ENDP
XPutPalStruc PROC FAR CompPalBuff : DWord
push ds
cld
lds si,CompPalBuff
lodsb
mov ah,0
mov bx,ax
lodsb
mov ah,0
mov cx,ax
mov ax, @data
mov es, ax
cmp es:[VSyncHandlerActive], TRUE
jne @@NoVSyncHandler
@@WaitForLast:
cmp es:[VsyncPaletteCount],0
jne @@WaitForLast
push cx
push es
mov di, offset VsyncPaletteBuffer
mov ax,3
mul cx
mov cx,ax
rep movsb
pop ds
pop cx
mov VsyncPaletteStart,bx
mov VsyncPaletteCount,cx
jmp short @@Done
@@NoVsyncHandler:
or cx,cx
jz @@Done
;cli
cld
mov dx,INPUTSTATUS0
@@WaitNotVsync:
in al,dx
test al,08h
jnz @@WaitNotVsync
@@WaitVsync:
in al,dx
test al,08h
jz @@WaitVsync
;new stuff
mov ax,3
mul cx
mov cx,ax
;end new stuff
mov ax,bx
mov bx,60
@@SetLoop:
mov dx,DACWRITEINDEX
out dx,al
mov dx,DACDATA
rep outsb
; outsb
; outsb
; outsb
; inc al
; dec bx
; js @@testvsync
; loop @@SetLoop
jmp @@Done
@@testvsync:
mov dx,INPUTSTATUS0
push ax
@@Wait:
in al,dx
test al,08h
jz @@Wait
pop ax
mov bx,60
loop @@SetLoop
@@Done:
sti
pop ds
ret
XPutPalStruc ENDP
XTransposePalStruc PROC FAR CompPalBuff : DWord, StartColor : Word
push ds
cld
lds si,CompPalBuff
mov bx,StartColor
mov [si],bl
inc si
lodsb
mov ah,0
mov cx,ax
mov ax, @data
mov es, ax
cmp es:[VSyncHandlerActive], TRUE
jne @@NoVSyncHandler
@@WaitForLast:
cmp es:[VsyncPaletteCount],0
jne @@WaitForLast
push cx
push es
mov di, offset VsyncPaletteBuffer
mov ax,3
mul cx
mov cx,ax
rep movsb
pop ds
pop cx
mov VsyncPaletteStart,bx
mov VsyncPaletteCount,cx
jmp short @@Done
@@NoVsyncHandler:
or cx,cx
jz @@Done
;cli
cld
mov dx,INPUTSTATUS0
@@WaitNotVsync:
in al,dx
test al,08h
jnz @@WaitNotVsync
@@WaitVsync:
in al,dx
test al,08h
jz @@WaitVsync
mov ax,bx
mov bx,60
@@SetLoop:
mov dx,DACWRITEINDEX
out dx,al
mov dx,DACDATA
outsb
outsb
outsb
inc al
; dec bx
; js @@testvsync
loop @@SetLoop
jmp @@Done
@@testvsync:
mov dx,INPUTSTATUS0
push ax
@@Wait:
in al,dx
test al,08h
jz @@Wait
pop ax
mov bx,60
loop @@SetLoop
@@Done:
sti
pop ds
ret
XTransposePalStruc ENDP
XPutPalRaw PROC FAR PalBuff : DWord, NumColors : Word, StartColor : Word
push ds
mov cx,NumColors
mov bx,StartColor
lds si,PalBuff
@@WritePalEntry:
mov ax, @data
mov es, ax
cmp es:[VSyncHandlerActive], TRUE
jne @@NoVSyncHandler
@@WaitForLast:
cmp es:[VsyncPaletteCount],0
jne @@WaitForLast
push cx
push es
mov di, offset VsyncPaletteBuffer
mov ax,3
mul cx
mov cx,ax
rep movsb
pop ds
pop cx
mov VsyncPaletteStart,bx
mov VsyncPaletteCount,cx
jmp short @@Done
@@NoVsyncHandler:
or cx,cx
jz @@Done
cld
mov dx,INPUTSTATUS0
@@WaitNotVsync:
in al,dx
test al,08h
jnz @@WaitNotVsync
@@WaitVsync:
in al,dx
test al,08h
jz @@WaitVsync
;new stuff
mov ax,3
mul cx
mov cx,ax
;end new stuff
mov ax,bx
mov bx,60
@@SetLoop:
mov dx,DACWRITEINDEX
out dx,al
mov dx,DACDATA
rep outsb
; outsb
; outsb
; outsb
; inc al
; dec bx
; js @@testvsync
; loop @@SetLoop
jmp @@Done
@@testvsync:
mov dx,INPUTSTATUS0
push ax
@@Wait:
in al,dx
test al,08h
jz @@Wait
pop ax
mov bx,60
loop @@SetLoop
@@Done:
pop ds
ret
XPutPalRaw ENDP
XSetRGB PROC FAR ColorIndex : Byte, R : Byte, G : Byte, B : Byte
mov al,ColorIndex
mov dx,DACWRITEINDEX
out dx,al
mov dx,DACDATA
mov al,R
out dx,al
mov al,G
out dx,al
mov al,B
out dx,al
ret
XSetRGB ENDP
XRotPalStruc PROC FAR PalBuff : DWord, Direction : Word
push ds
cld
lds si,PalBuff
lodsw
xor ch,ch
mov cl,ah
mov ax,ds
mov es,ax
dec cx
mov bx,cx
shl bx,1
add cx,bx
cmp Direction,0
jne @@forward
std
add si,cx
add si,2
@@forward:
mov ax,si
mov di,ax
lodsb
mov dl,al
lodsb
mov dh,al
lodsb
mov bl,al
rep movsb
mov al,dl
stosb
mov al,dh
stosb
mov al,bl
stosb
pop ds
ret
XRotPalStruc ENDP
XRotPalRaw PROC FAR PalBuff : DWord, Direction : Word, NumColors : Word
push ds
cld
mov cx,NumColors
lds si,PalBuff
@@RotatePalEntry:
mov ax,ds
mov es,ax
dec cx
mov bx,cx
shl bx,1
add cx,bx
cmp Direction,0
jne @@forward
std
add si,cx
add si,2
@@forward:
mov ax,si
mov di,ax
lodsb
mov dl,al
lodsb
mov dh,al
lodsb
mov bl,al
rep movsb
mov al,dl
stosb
mov al,dh
stosb
mov al,bl
stosb
pop ds
ret
XRotPalRaw ENDP
XCpContrastPalStruc PROC FAR PalSrcBuff : DWord, PalDestBuff : DWord,\
Intensity : Byte
push ds
cld
mov bh,0ffh
sub bh,Intensity
and bh,07fh
lds si,PalSrcBuff
les di,PalDestBuff
lodsw
stosw
xor ch,ch
mov cl,ah
mov dx,0
@@MainLoop:
lodsw
sub al,bh
jns @@DecrementOKR
xor al,al
@@DecrementOKR:
sub ah,bh
jns @@DecrementOKG
xor ah,ah
@@DecrementOKG:
or dx,ax
or dl,ah
stosw
lodsb
sub al,bh
jns @@DecrementOKB
xor al,al
@@DecrementOKB:
or dl,al
stosb
loop @@MainLoop
mov ax,dx
pop ds
ret
XCpContrastPalStruc ENDP
XPutContrastPalStruc PROC FAR CompPalBuff : DWord, Intensity : Byte
push ds
cld
mov bh,0ffh
sub bh,Intensity
and bh,07fh
mov di,40
lds si,CompPalBuff
lodsb
mov bl,al
lodsb
mov ah,0
mov cx,ax
or cx,cx
jz @@Done
mov dx,INPUTSTATUS0
@@WaitNotVsync:
in al,dx
test al,08h
jnz @@WaitNotVsync
@@WaitVsync:
in al,dx
test al,08h
jz @@WaitVsync
@@MainLoop:
mov al,bl
mov dx,DACWRITEINDEX
out dx,al
inc dx
lodsb
sub al,bh
jns @@DecrementOKR
xor al,al
@@DecrementOKR:
out dx,al
lodsb
sub al,bh
jns @@DecrementOKG
xor al,al
@@DecrementOKG:
out dx,al
lodsb
sub al,bh
jns @@DecrementOKB
xor al,al
@@DecrementOKB:
out dx,al
inc bl
dec di
js @@testvsync
loop @@MainLoop
jmp @@Done
@@testvsync:
mov dx,INPUTSTATUS0
push ax
@@Wait:
in al,dx
test al,08h
jz @@Wait
pop ax
mov di,40
loop @@MainLoop
@@Done:
;sti
pop ds
ret
XPutContrastPalStruc ENDP
XTextInit PROC FAR
push bp
mov FontDriverActive,1
mov ax,1130h
push ax
mov bh,3
int 10h
mov word ptr F8x8Ptr,bp
IFDEF _DPMI_
mov ax, __C000H
mov es, ax
ENDIF
mov word ptr F8x8Ptr+2,es
mov word ptr FontPtr,bp
mov word ptr FontPtr+2,es
pop ax
mov bh,2
int 10h
mov word ptr F8x14Ptr,bp
IFDEF _DPMI_
mov ax, __C000H
mov es, ax
ENDIF
mov word ptr F8x14Ptr+2,es
mov al,8
mov CharHeight,al
mov CharWidth ,al
mov dx,offset MirrorTable
mov MirrorTableOffs,dx
pop bp
ret
XTextInit ENDP
XSetFont PROC FAR FontID : Word
xor dx,dx
mov cx,FontID
cmp cx,2
jne @@notuserfont
mov ax,word ptr UserFontPtr
mov word ptr FontPtr,ax
mov ax,word ptr UserFontPtr+2
mov word ptr FontPtr+2,ax
mov al,UserChHeight
mov CharHeight,al
mov al,UserChWidth
mov CharWidth,al
mov al,UserFirstCh
mov FirstChar,al
jmp @@done
@@notuserfont:
mov dx,offset MirrorTable
mov CharWidth,8
mov FirstChar,0
cmp cx,1
jne @@not8x14font
mov ax,word ptr F8x14Ptr
mov word ptr FontPtr,ax
mov ax,word ptr F8x14Ptr+2
mov word ptr FontPtr+2,ax
mov CharHeight,14
jmp @@done
@@not8x14font:
mov ax,word ptr F8x8Ptr
mov word ptr FontPtr,ax
mov ax,word ptr F8x8Ptr+2
mov word ptr FontPtr+2,ax
mov CharHeight,8
@@done:
mov MirrorTableOffs,dx
ret
XSetFont ENDP
XRegisterUserFont PROC FAR FontToRegister : DWord
mov ax,word ptr FontToRegister
mov bx,word ptr FontToRegister+2
add ax,4
mov word ptr UserFontPtr,ax
mov word ptr UserFontPtr+2,bx
push ds
lds si,FontToRegister
lodsw
mov bx,ax
lodsw
pop ds
mov UserChHeight,al
mov UserChWidth,ah
mov UserFirstCh,bl
ret
XRegisterUserFont ENDP
XGetCharWidth PROC FAR ACh : Byte
xor ah,ah
mov al,CharWidth
or al,al
jz @@NotFixed
jmp @@Done
@@NotFixed:
push si
mov al,CharHeight
mov bx,ax
inc al
mov dl, ACh
sub dl,FirstChar
mul dl
add ax,bx
les si,dword ptr FontPtr
add si,ax
xor ah,ah
mov al,byte ptr es:[si]
@@Done:
ret
XGetCharWidth ENDP
XCharPut PROC FAR Chr : Byte, X : Word, Y : Word, ScrnOffs : Word, Color : Word
LOCAL ScreenInc : Word, Hold : Word
push ds
cld
mov ax,ScrnLogicalByteWidth
mov bx,ax
sub bx,3
mov ScreenInc,bx
mul Y
mov di,X
mov cx,di
shr di,2
add di,ax
add di,ScrnOffs
mov ax,SCREENSEG
mov es,ax
and cx,3
mov bx,MirrorTableOffs
mov al,CharHeight
xor ah,ah
mov ch,al
cmp CharWidth,0
jne @@NoWidthByte
inc al
@@NoWidthByte:
mov dl,Chr
sub dl,FirstChar
mul dl
lds si,dword ptr FontPtr
add si,ax
mov dx,SCINDEX
@@MainLoop:
lodsb
or al,al
jz @@NoCharPixels
or bx,bx
jz @@DontMirror
push ds
mov dx,seg @data
mov ds,dx
xlat
pop ds
mov dx,SCINDEX
@@DontMirror:
xor ah,ah
shl ax,cl
mov Hold,ax
mov ah,al
and ah,0fh
jnz @@p1
inc di
jmp @@SecondNibble
@@p1:
mov al,MAPMASK
out dx,ax
mov al,byte ptr Color
stosb
@@SecondNibble:
mov ax,Hold
shl ax,4
and ah,0fh
jnz @@p2
inc di
jmp @@ThirdNibble
@@p2:
mov al,MAPMASK
out dx,ax
mov al,byte ptr Color
stosb
@@ThirdNibble:
mov ax,Hold
and ah,0fh
jnz @@p3
inc di
jmp @@NextCharRow
@@p3:
mov al,MAPMASK
out dx,ax
mov al,byte ptr Color
stosb
@@NextCharRow:
add di,ScreenInc
dec ch
jnz @@MainLoop
@@done:
pop es
mov ah,0
mov al,es:CharWidth
or al,al
jnz @@FixedSpacing
lodsb
@@FixedSpacing:
mov bx,es
mov ds,bx
jmp @@TheEnd
@@NoCharPixels:
add di,3
add di,ScreenInc
dec ch
jnz @@MainLoop
jmp @@done
@@TheEnd:
ret
XCharPut ENDP
HLineClipR PROC NEAR
push di
cmp dx,ax
jl @@Invisible
cmp cx,TopClip
jl @@Invisible
cmp cx,BottomClip
jg @@Invisible
mov di,RightClip
sal di,2
cmp ax,di
jg @@Invisible
cmp dx,di
jle @@ClipLeft
mov dx,di
@@ClipLeft:
mov di,LeftClip
sal di,2
cmp dx,di
jl @@Invisible
cmp ax,di
jge @@DoLine
mov ax,di
jmp @@DoLine
@@Invisible:
pop di
ret
@@DoLine:
pop di
xchg cx,ax
mov si,dx
mul ScrnLogicalByteWidth
mov dx,si
add ax,di
mov di,cx
sar di,2
add di,ax
and si,03h
mov ah,byte ptr RightClipPlaneMask[si]
mov si,cx
and si,03h
mov al,byte ptr LeftClipPlaneMask[si]
cmp dx,cx
jle @@Invisible2
xchg cx,dx
dec cx
and dx,not 03h
sub cx,dx
js @@Invisible2
shr cx,2
jnz @@MasksSet
and al,ah
@@MasksSet:
mov dl,bl
mov bx,ax
mov ah,dl
mov dx,SCINDEX+1
mov al,bl
out dx,al
mov al,ah
stosb
dec cx
js @@Invisible2
jz @@RightEnd
mov al,0fh
out dx,al
mov al,ah
shr cx,1
rep stosw
adc cx,cx
rep stosb
@@RightEnd:
mov al,bh
out dx,al
mov al,ah
stosb
@@Invisible2:
ret
HLineClipR ENDP
XTriangle PROC FAR X0, Y0, X1, Y1, X2, Y2, Color, PageOffset : Word
LOCAL DX01, DY01, DX02, DY02, DX12, DY12, DP01, DP02, DP12, XA01, XA02, XA12 : Word
push di
push es
push ds
mov ax,X0
mov bx,Y0
mov cx,X1
mov dx,Y1
cmp bx,dx
jl @@triY0lY1
je @@triY0eY1
xchg ax,cx
xchg bx,dx
@@triY0lY1:
cmp dx,Y2
jg @@tria
jmp @@trisorted
@@tria:
xchg cx,X2
xchg dx,Y2
cmp bx,dx
jge @@trib
jmp @@trisorted
@@trib:
je @@tribot
xchg ax,cx
xchg bx,dx
jmp @@trisorted
@@triY0eY1:
cmp bx,Y2
jl @@tribot
jg @@tric
jmp @@tridone
@@tric:
xchg ax,X2
xchg bx,Y2
jmp @@trisorted
@@tribot:
cmp ax,cx
jl @@tribotsorted
jg @@tribota
jmp @@tridone
@@tribota:
xchg ax,cx
@@tribotsorted:
cmp bx,BottomClip
jle @@triboty0ok
jmp @@tridone
@@triboty0ok:
mov si,Y2
cmp si,TopClip
jge @@triboty2ok
jmp @@tridone
@@triboty2ok:
mov X0,ax
mov Y0,bx
mov X1,cx
mov Y1,dx
mov bx,Y2
sub bx,Y0
mov DY02,bx
mov ax,X2
sub ax,X0
mov DX02,ax
mov cx,ax
cwd
idiv bx
cmp cx,0
jge @@tribot02
dec ax
@@tribot02:
mov XA02,ax
imul bx
sub cx,ax
mov DP02,cx
mov bx,Y2
sub bx,Y1
mov DY12,bx
mov ax,X2
sub ax,X1
mov DX12,ax
mov cx,ax
cwd
idiv bx
cmp cx,0
jge @@tribot12
dec ax
@@tribot12:
mov XA12,ax
imul bx
sub cx,ax
mov DP12,cx
mov ax,0
mov bx,0
mov cx,Y0
mov si,X0
mov di,X1
dec di
@@tribotloop:
inc cx
add ax,DP02
jle @@tribotshortl
sub ax,DY02
inc si
@@tribotshortl:
add si,XA02
add bx,DP12
jle @@tribotshortr
sub bx,DY12
inc di
@@tribotshortr:
add di,XA12
push di
push si
cmp cx,Y2
jl @@tribotloop
jmp @@tridrawlines
@@trisorted:
cmp bx,BottomClip
jle @@triy0ok
jmp @@tridone
@@triy0ok:
mov si,Y2
cmp si,TopClip
jge @@triy2ok
jmp @@tridone
@@triy2ok:
mov X0,ax
mov Y0,bx
mov X1,cx
mov Y1,dx
mov bx,dx
sub bx,Y0
mov DY01,bx
mov ax,X1
sub ax,X0
mov DX01,ax
mov cx,ax
cwd
idiv bx
cmp cx,0
jge @@tripsl01
dec ax
@@tripsl01:
mov XA01,ax
imul bx
sub cx,ax
mov DP01,cx
mov bx,Y2
sub bx,Y0
mov DY02,bx
mov ax,X2
sub ax,X0
mov DX02,ax
mov cx,ax
cwd
idiv bx
cmp cx,0
jge @@tripsl02
dec ax
@@tripsl02:
mov XA02,ax
imul bx
sub cx,ax
mov DP02,cx
mov bx,Y2
sub bx,Y1
jle @@triconstcomputed
mov DY12,bx
mov ax,X2
sub ax,X1
mov DX12,ax
mov cx,ax
cwd
idiv bx
cmp cx,0
jge @@tripsl12
dec ax
@@tripsl12:
mov XA12,ax
imul bx
sub cx,ax
mov DP12,cx
@@triconstcomputed:
mov ax,DX01
imul word ptr DY02
mov bx,ax
mov cx,dx
mov ax,DX02
imul word ptr DY01
cmp cx,dx
jg @@tript1rt
jl @@tript1lt
cmp bx,ax
ja @@tript1rt
jb @@tript1lt
jmp @@tridone
@@tript1lt:
mov ax,0
mov bx,0
mov cx,Y0
mov si,X0
mov di,si
dec si
@@triltloop:
inc cx
add ax,DP02
jle @@triltshortl
sub ax,DY02
inc si
@@triltshortl:
add si,XA02
add bx,DP01
jle @@triltshortr
sub bx,DY01
inc di
@@triltshortr:
add di,XA01
push si
push di
cmp cx,Y1
jl @@triltloop
jmp @@trilbstart
@@trilbloop:
inc cx
add ax,DP02
jle @@trilbshortl
sub ax,DY02
inc si
@@trilbshortl:
add si,XA02
add bx,DP12
jle @@trilbshortr
sub bx,DY12
inc di
@@trilbshortr:
add di,XA12
push si
push di
@@trilbstart:
cmp cx,Y2
jl @@trilbloop
jmp @@tridrawlines
@@tript1rt:
mov ax,0
mov bx,0
mov cx,Y0
mov si,X0
mov di,si
dec di
@@trirtloop:
inc cx
add ax,DP02
jle @@trirtshortl
sub ax,DY02
inc si
@@trirtshortl:
add si,XA02
add bx,DP01
jle @@trirtshortr
sub bx,DY01
inc di
@@trirtshortr:
add di,XA01
push di
push si
cmp cx,Y1
jl @@trirtloop
jmp @@trirbstart
@@trirbloop:
inc cx
add ax,DP02
jle @@trirbshortl
sub ax,DY02
inc si
@@trirbshortl:
add si,XA02
add bx,DP12
jle @@trirbshorts
sub bx,DY12
inc di
@@trirbshorts:
add di,XA12
push di
push si
@@trirbstart:
cmp cx,Y2
jl @@trirbloop
@@tridrawlines:
mov cx,SCREENSEG
mov es,cx
mov dx,SCINDEX
mov al,MAPMASK
out dx,al
@@lineloop:
pop ax
pop dx
cmp ax,dx
jg @@tridrawnext
mov bx,Color
mov cx,Y2
add dx,2
mov di,PageOffset
call HLineClipR
@@tridrawnext:
dec word ptr Y2
dec word ptr DY02
jnz @@lineloop
@@tridone:
pop ds
pop es
pop di
ret
XTriangle ENDP
XPolygon PROC FAR vertices : DWord, numvertices : Word, Color : Word,\
PageOffset : Word
LOCAL x0 : Word, y0 : Word, tricount : Word
mov cx,numvertices
cmp cx,3
jl @@Done
sub cx,3
mov tricount,cx
les di,vertices
mov ax,es:[di]
mov x0,ax
mov ax,es:[di+2]
mov y0,ax
@@NextTriangle:
add di, 4
mov ax, x0
push ax
mov ax, y0
push ax
mov ax, es:[di+4]
push ax
mov ax, es:[di+6]
push ax
mov ax,es:[di]
push ax
mov ax,es:[di+2]
push ax
mov ax, color
push ax
mov ax, pageoffset
push ax
call xtriangle
dec tricount
jns @@NextTriangle
@@Done:
ret
XPolygon ENDP
XPutCursor PROC FAR X : Word, Y : Word, ATopClip : Word, ABottomClip : Word,\
ScrnOffs : Word
LOCAL Height : Word, TopRow : Word, NextLineIncr : Word
push si
push di
push ds
mov ax,seg @data
mov ds,ax
cld
mov ax,14
mov bx,Y
mov dx,ATopClip
sub dx,bx
jle @@NotTopClip
cmp dx,ax
jnl @@NotVisible
mov cx,dx
sub ax,dx
add bx,dx
jmp @@VertClipDone
@@NotVisible:
pop ds
pop di
pop si
jmp @@Done
@@NotTopClip:
mov dx,ABottomClip
sub dx,bx
js @@NotVisible
mov cx,0
cmp dx,ax
jg @@VertClipDone
inc dx
mov ax,dx
@@VertClipDone:
mov Height,ax
mov TopRow,cx
mov ax,SCREENSEG
mov es,ax
mov ax,bx
mov cx,ScrnLogicalByteWidth
mul cx
mov di,ax
sub cx,3
mov NextLineIncr,cx
mov cx,X
mov bx,cx
shr cx,2
add di,cx
and bx,3
add di,ScrnOffs
mov ax,42
mul bx
mov si,offset MouseMask
add si,ax
mov ax,3
mul TopRow
add si,ax
mov dx,SCINDEX
mov al,MAPMASK
out dx,al
inc dx
mov ah,byte ptr Height
mov bl,MouseColor
@@RowLoop:
mov cx,3
@@ColLoop:
lodsb
out dx,al
mov es:[di],bl
inc di
loop @@ColLoop
add di,NextLineIncr
dec ah
jnz @@RowLoop
pop ds
pop di
pop si
@@Done:
ret
ENDP
GetBG PROC NEAR
push ds
cld
mov cx,ScrnLogicalByteWidth
mul cx
add si,ax
sub cx,3
shr bx,2
add si,bx
mov bx,cx
mov di,BGSaveOffs
mov ax,SCREENSEG
mov es,ax
mov ds,ax
mov dx,GCINDEX
mov ax,BITMASK
out dx,ax
mov dx,SCINDEX
mov al,MAPMASK
out dx,al
inc dx
mov al,0fh
out dx,al
mov cx,14
@@Loop:
movsb
movsb
movsb
add si,bx
loop @@Loop
mov dx,GCINDEX+1
mov al,0ffh
out dx,al
pop ds
ret
GetBg ENDP
RestoreBG PROC NEAR
push ds
cld
mov cx,ScrnLogicalByteWidth
mul cx
add di,ax
sub cx,3
shr bx,2
add di,bx
mov si,BGSaveOffs
mov ax,SCREENSEG
mov es,ax
mov ds,ax
mov dx,GCINDEX
mov ax,BITMASK
out dx,ax
mov dx,SCINDEX
mov al,MAPMASK
out dx,al
inc dx
mov al,0fh
out dx,al
mov bx,cx
mov cx,14
@@Loop:
movsb
movsb
movsb
add di,bx
loop @@Loop
mov dx,GCINDEX+1
mov al,0ffh
out dx,al
pop ds
ret
RestoreBg ENDP
UpdateCursor PROC FAR
cmp VSyncHandlerActive,1
je @@SkipVS
mov dx,InputStatus0
@@WaitNotVsync:
in al,dx
test al,08h
jnz @@WaitNotVSync
@@WaitVSync:
in al,dx
test al,08h
jz @@WaitVSync
@@SkipVS:
mov di,OldScrnOffs
mov ax,OldY
mov bx,OldX
call restorebg
mov si,VisiblePageOffs
mov ax,MouseY
mov bx,MouseX
mov OldScrnOffs,si
mov OldY,ax
mov OldX,bx
call getbg
push OldX
push OldY
mov ax,0
push ax
mov ax,ScrnPhysicalHeight
push ax
push VisiblePageOffs
call xputcursor
ret
UpdateCursor ENDP
MouseHandler PROC FAR
push ds
mov di,seg @data
mov ds,di
cmp inhandler,1
jne @@NotActive
jmp @@Done2
@@NotActive:
mov inhandler,1
mov MouseButtonStatus,bx
test ax,1
jz @@Done
shr cx,1
mov MouseX,cx
mov MouseY,dx
cmp MouseHidden,1
je @@Done
cmp MouseFrozen,1
je @@Done
cmp VSyncHandlerActive,1
je @@VSyncHandle
call updatecursor
jmp short @@Done
@@VSyncHandle:
mov MouseRefreshFlag,1
@@Done:
mov inhandler,0
@@Done2:
pop ds
ret
MouseHandler ENDP
XDefineMouseCursor PROC FAR MouseDef : DWord, MouseColour : Byte
cmp MouseInstalled,0
je @@Done
mov al,MouseColour
mov MouseColor,al
push si
push di
push ds
mov ax,ds
mov es,ax
mov di,offset MouseMask
lds si,MouseDef
xor cl,cl
@@AlignmentLoop:
push si
mov dh,14
@@RowLoop:
lodsb
xor ah,ah
shl ax,cl
mov bl,al
and bl,0fh
mov es:[di],bl
inc di
shr al,4
stosw
dec dh
jnz @@RowLoop
pop si
inc cl
cmp cl,4
jne @@AlignmentLoop
pop ds
pop di
pop si
@@Done:
ret
XDefineMouseCursor ENDP
XMouseInit PROC FAR
mov InHandler,0
mov mousehidden,0
mov BGSaveOffs,0
mov MouseX,0
mov MOuseY,0
mov MouseButtonStatus,0
mov MouseFrozen,0
mov MouseColor,0
mov MouseInstalled,0
cmp MouseButtonCount,0
jne @@DontInitialize
xor ax,ax
int 33h
or ax,ax
jz @@Done
mov MouseButtonCount,bx
@@DontInitialize:
mov MouseInstalled,ax
or ax,ax
jz @@Done
mov ax,NonVisualOffs
mov BGSaveOffs,ax
add ax,42
mov NonVisualOffs,ax
mov ax,02
int 33h
mov MouseInstalled,1
mov ax,07h
mov cx,0
mov dx,ScrnPhysicalPixelWidth
shl dx,1
int 33h
mov ax,08h
mov cx,0
mov dx,ScrnPhysicalHeight
int 33h
mov ax,0fh
mov cx,4
mov dx,8
int 33h
mov ax,3
int 33h
mov MouseY,dx
shr cx,1
mov MouseX,cx
mov ax,12
mov bx,seg mousehandler
mov es,bx
mov dx,offset mousehandler
mov cx,1fh
int 33h
mov MouseHidden,1
push ds
mov ax,offset InitMouseDef
push ax
mov al, MouseColor
push ax
call xdefinemousecursor
cmp VSyncHandlerActive,1
jne @@AllIsWell
mov ax, offset updatecursor
mov dx, seg updatecursor
cli
mov word ptr [MouseVSyncHandler],ax
mov word ptr [MouseVsyncHandler+2],dx
mov MouseRefreshFlag,0
sti
@@AllIsWell:
mov ax,MouseInstalled
@@Done:
ret
XMouseInit ENDP
XMouseWindow PROC FAR x0 : Word, y0 : Word, x1 : Word, y1 : Word
mov ax,7
mov cx,x0
shl cx,1
mov dx,x1
shl dx,1
int 33h
mov ax,8
mov cx,y0
mov dx,y1
int 33h
ret
XMouseWindow ENDP
XShowMouse PROC FAR
cmp MouseInstalled,0
je @@Done
cmp MouseHidden,0
je @@Done
push si
push di
@@WaitEndOfHandler:
mov cl,inhandler
or cl,cl
jnz @@WaitEndOfHandler
mov si,VisiblePageOffs
mov ax,MouseY
mov bx,MouseX
mov OldScrnOffs,si
mov OldY,ax
mov OldX,bx
call getbg
push OldX
push OldY
xor ax,ax
push ax
push ScrnLogicalHeight
push VisiblePageOffs
call xputcursor
mov MouseHidden,0
pop di
pop si
@@Done:
ret
XShowMouse ENDP
XHideMouse PROC FAR
cmp MouseInstalled,0
je @@Done
cmp MouseHidden,0
jne @@Done
push si
push di
@@WaitEndOfHandler:
mov cl,inhandler
or cl,cl
jnz @@WaitEndOfHandler
mov MouseHidden,TRUE
mov di,OldScrnOffs
mov ax,OldY
mov bx,OldX
call restorebg
pop di
pop si
@@Done:
ret
XHideMouse ENDP
XMouseRemove PROC FAR
cmp MouseInstalled,0
je @@Done
call xhidemouse
mov ax,12
xor cx,cx
int 33h
mov MouseRefreshFlag,0
mov MouseInstalled,0
@@Done:
ret
XMouseRemove ENDP
XPositionMouse PROC FAR X : Word, Y : Word
@@WaitEndOfHandler:
mov bl,inhandler
or bl,bl
jnz @@WaitEndOfHandler
mov ax,4
mov cx,X
mov dx,Y
mov MouseX,cx
mov MouseY,dx
shl cx,1
mov inhandler,1
int 33h
cmp MouseHidden,FALSE
jne @@NotVisible
push di
push si
call updatecursor
pop si
pop di
@@NotVisible:
mov inhandler,0
ret
XPositionMouse ENDP
XUpdateMouse PROC FAR
cmp MouseInstalled,0
je @@Done
cmp MouseHidden,0
jne @@Done
mov ax,03h
int 33h
shr cx,1
mov MouseX,cx
mov MouseY,dx
mov MouseButtonStatus,bx
cmp VSyncHandlerActive,1
je @@HandleVSync
call updatecursor
jmp short @@Done
@@HandleVSync:
mov MouseRefreshFlag,1
@@Done:
ret
XUpdateMouse ENDP
XFloodFill PROC FAR X : Word, Y : Word, PgOfs : Word, Color : Word
LOCAL len : Word, y1 : Word, y2 : Word, deltax : Word, floodval : Word,\
Astackptr : Word, FillCount : Word
mov FillCount,0
mov si,Y
mov ax,ScrnLogicalByteWidth
mul si
mov di,X
mov bx,di
shr di,2
add di,ax
add di,PgOfs
mov ax,SCREENSEG
mov es,ax
mov ah,bl
and ah,011b
mov al,READMAP
mov dx,GCINDEX
out dx,ax
mov al,es:[di]
cmp al,byte ptr Color
je @@Done
mov cx,LeftClip
sal cx,2
cmp bx,cx
jl @@Done
mov cx,RightClip
sal cx,2
cmp bx,cx
jg @@Done
mov floodval,ax
push bx
push si
push si
mov cx,1
push cx
mov Astackptr,1
mov deltax,-1
mov y1,si
mov y2,si
jmp @@entry
@@Done2:
jmp @@Done
@@NextScanCol:
dec Astackptr
js @@Done2
@@WhileLoop:
pop cx
mov deltax,cx
pop ax
mov y2,ax
pop si
mov y1,si
pop bx
sub ax,si
jns @@PositiveY
neg ax
@@PositiveY:
add FillCount,ax
add bx,cx
mov ax,bx
sar ax,2
cmp ax,LeftClip
jl @@NextScanCol
cmp ax,RightClip
jg @@NextScanCol
mov ah,bl
and ah,011b
mov al,READMAP
mov dx,GCINDEX
out dx,ax
@@entry:
mov cl,bl
and cl,011b
mov ax,0100h + MAPMASK
shl ah,cl
mov dx,SCINDEX
out dx,ax
mov ax,ScrnLogicalByteWidth
mov cx,ax
mul si
mov di,bx
shr di,2
add di,ax
add di,PgOfs
mov dx,di
mov al,byte ptr Color
mov ah,byte ptr floodval
@@FillColUpward:
cmp si,TopClip
jl @@UpwardFillDone
cmp es:[di],ah
jne @@UpwardFillDone
mov es:[di],al
sub di,cx
dec si
jmp @@FillColUpward
@@UpwardFillDone:
cmp si,y1
jge @@Skip
inc si
mov len,si
cmp si,y1
jge @@AtColumnTop
push bx
push si
mov ax,y1
dec ax
push ax
mov ax,deltax
neg ax
push ax
inc Astackptr
@@AtColumnTop:
mov si,y1
mov di,dx
add di,cx
inc si
@@ColumnLoop:
mov ah,byte ptr floodval
mov al,byte ptr Color
@@DownwardFill:
cmp si,BottomClip
jg @@DownwardFillDone
cmp es:[di],ah
jne @@DownwardFillDone
mov es:[di],al
add di,cx
inc si
jmp @@DownwardFill
@@DownwardFillDone:
push bx
mov ax,len
push ax
mov ax,si
dec ax
push ax
mov ax,deltax
push ax
inc Astackptr
mov ax,y2
inc ax
cmp si,ax
jle @@Skip
push bx
push ax
mov ax,si
dec ax
push ax
mov ax,deltax
neg ax
push ax
inc Astackptr
@@Skip:
mov ah,byte ptr floodval
mov dx,y2
@@Backtrack:
add di,cx
inc si
cmp si,dx
jg @@BacktrackDone
cmp byte ptr es:[di],ah
jne @@Backtrack
@@BacktrackDone:
mov len,si
cmp si,dx
jle @@ColumnLoop
dec Astackptr
js @@Done
jmp @@WhileLoop
@@Done:
mov ax,FillCount
ret
XFloodFill ENDP
XBoundaryFill PROC FAR X : Word, Y : Word, PgOfs : Word, BoundaryColor : Word,\
Color : Word
LOCAL len : Word, y1 : Word, y2 : Word, deltax : Word, y1offs : Word,\
Astackptr : Word, FillCount : Word
mov FillCount,0
mov si,Y
mov ax,ScrnLogicalByteWidth
mul si
mov di,X
mov bx,di
shr di,2
add di,ax
add di,PgOfs
mov ax,SCREENSEG
mov es,ax
mov ah,bl
and ah,011b
mov al,READMAP
mov dx,GCINDEX
out dx,ax
mov al,es:[di]
cmp al,byte ptr Color
je @@Done
cmp al,byte ptr BoundaryColor
je @@Done
mov cx,LeftClip
sal cx,2
cmp bx,cx
jl @@Done
mov cx,RightClip
sal cx,2
cmp bx,cx
jg @@Done
push bx
push si
push si
mov cx,1
push cx
mov Astackptr,1
mov al,byte ptr BoundaryColor
mov byte ptr [Color+1],al
mov deltax,-1
mov y1,si
mov y2,si
jmp @@entry
@@NextScanCol:
dec Astackptr
js @@Done
@@WhileLoop:
pop cx
mov deltax,cx
pop ax
mov y2,ax
pop si
mov y1,si
pop bx
add bx,cx
sub ax,si
jns @@PositiveY
neg ax
@@PositiveY:
add FillCount,ax
mov ax,bx
sar ax,2
cmp ax,LeftClip
jl @@NextScanCol
cmp ax,RightClip
jg @@NextScanCol
mov ah,bl
and ah,011b
mov al,READMAP
mov dx,GCINDEX
out dx,ax
@@entry:
mov cl,bl
and cl,011b
mov ax,0100h + MAPMASK
shl ah,cl
mov dx,SCINDEX
out dx,ax
mov ax,ScrnLogicalByteWidth
mov cx,ax
mul si
mov di,bx
shr di,2
add di,ax
add di,PgOfs
mov y1offs,di
mov ax,Color
@@FillColUpward:
cmp si,TopClip
jl @@UpwardFillDone
mov dl,es:[di]
cmp dl,ah
je @@UpwardFillDone
cmp dl,al
je @@UpwardFillDone
mov es:[di],al
sub di,cx
dec si
jmp @@FillColUpward
@@UpwardFillDone:
cmp si,y1
jge @@Skip
inc si
mov len,si
cmp si,y1
jge @@AtColumnTop
push bx
push si
mov ax,y1
dec ax
push ax
mov ax,deltax
neg ax
push ax
inc Astackptr
@@AtColumnTop:
mov si,y1
mov di,y1offs
add di,cx
inc si
@@ColumnLoop:
mov ax,Color
@@DownwardFill:
cmp si,BottomClip
jg @@DownwardFillDone
cmp es:[di],ah
je @@DownwardFillDone
cmp es:[di],al
je @@DownwardFillDone
mov es:[di],al
add di,cx
inc si
jmp @@DownwardFill
@@DownwardFillDone:
push bx
mov ax,len
push ax
mov ax,si
dec ax
push ax
mov ax,deltax
push ax
inc Astackptr
mov ax,y2
inc ax
cmp si,ax
jle @@Skip
push bx
push ax
mov ax,si
dec ax
push ax
mov ax,deltax
neg ax
push ax
inc Astackptr
@@Skip:
mov ax,Color
@@Backtrack:
add di,cx
inc si
cmp si,y2
jg @@BacktrackDone
mov dl,byte ptr es:[di]
cmp dl,al
je @@Backtrack
cmp dl,ah
je @@Backtrack
@@BacktrackDone:
mov len,si
cmp si,y2
jle @@ColumnLoop
dec Astackptr
js @@Done
jmp @@WhileLoop
@@Done:
mov ax,FillCount
ret
XBoundaryFill ENDP
getvsyncperiod proc near
mov al,TIMERMODE ;Start timer
out TIMERCONTROL,al
mov al,0
out TIMER0,al
out TIMER0,al
WaitVsyncStart
mov al,LATCHCOUNT
out TIMERCONTROL,al
in al,TIMER0
mov cl,al
in al,TIMER0
mov ch,al ;cx=65536-clicks
WaitVsyncStart
mov al,LATCHCOUNT
out TIMERCONTROL,al
in al,TIMER0
mov dl,al
in al,TIMER0
mov dh,al
sub cx,dx
mov ax,cx
ret
getvsyncperiod endp
vsyncint proc far
pusha
push ds
push es
mov ax,@data
mov ds,ax
add VsyncIntTicksLo,1
adc VsyncIntTicksHi,0
inc ElapsedVrts
mov cx,ElapsedVrts
cmp cx,VrtsToSkip
jl @@StopClock
cmp StartAddressFlag,1
jne @@StopClock
mov dx,CRTCINDEX
mov ax,WaitingStartLow
mov bx,WaitingStartHigh
out dx,ax
mov ax,bx
out dx,ax
@@StopClock:
cli
mov al,TIMERMODE
out TIMERCONTROL,al
mov al,255
out TIMER0,al
out TIMER0,al
sti
cli
mov dx,INPUTSTATUS0
@@WaitVS:
in al,dx
test al,08h
jz @@WaitVS
mov al,TIMERMODE
out TIMERCONTROL,al
mov ax,ClockRate
out TIMER0,al
mov al,ah
out TIMER0,al
cmp cx,VrtsToSkip
jl @@PaletteInt
cmp StartAddressFlag,1
jne @@PaletteInt
xor cx,cx
mov ElapsedVrts,cx
mov ax,WaitingPelPan
mov dx,ACINDEX
out dx,al
mov al,ah
out dx,al
@@PaletteInt:
mov StartAddressFlag,0
cmp VsyncPaletteCount,0
je @@MouseInt
mov si, offset VsyncPaletteBuffer
mov cx, VsyncPaletteCount
mov ax, cx
shl cx, 1
add cx, ax
mov ax, VsyncPaletteStart
mov dx, DACWRITEINDEX
out dx, al
mov dx, DACDATA
rep outsb
mov VsyncPaletteCount,0
@@MouseInt:
cmp MouseRefreshFlag,1
jne @@UserInt
call dword ptr [MouseVsyncHandler]
mov MouseRefreshFlag,0
@@UserInt:
cmp UserVsyncSeg, 0
je short @@Sim182
cmp InUserHandler,0
jne short @@Sim182
mov InUserHandler,1
mov StackSeg,ss
mov StackPtr,sp
push ds
pop ss
mov sp, offset LocalStack
sti
call dword ptr [UserVsyncHandler]
cli
mov sp, StackPtr
mov ss, StackSeg
mov InUserHandler,0
@@Sim182:
mov ax,[VsyncPeriod]
add [ClockCounter],ax
jnc short @@DontChainOld
pop es
pop ds
popa
sti
pushf
db 09ah ; call far
OldTimerInt dd 0 ; Self modifying code
iret
@@DontChainOld:
mov al,NONSPECEOI
out PICCMD,al
pop es
pop ds
popa
sti
iret
vsyncint endp
xinstallvsynchandler proc far VrtSkipCount:word
mov ax,[VrtSkipCount]
or ax,ax
jnz @@NonZeroCount
mov ax,1
@@NonZeroCount:
mov [VrtsToSkip],ax
mov [ElapsedVrts],0
cmp [VsyncHandlerActive],TRUE ;Is it already active
je short @@Return
call getvsyncperiod ;no, get the vsync period
mov [VsyncPeriod],ax
sub ax,INTINADVANCE ;We need a little extra
mov [ClockRate],ax ;time
mov dx,18 ;dx:ax=1193000
mov ax,13352
idiv [VsyncPeriod]
mov [TicksPerSecond],ax ;1193/VsyncPeriod
mov word ptr [VsyncIntTicks],0
mov word ptr [VsyncIntTicks+2],0
mov MouseRefreshFlag, 0
mov StartAddressFlag, 0
mov VSyncPaletteCount, 0
cli
IFDEF _DPMI_
mov ax, dpmiGetInt
mov bl, TIMERVECT
int DPMI ;Get Pmode vector
mov ax, cs ;vector = cx:dx
add ax, SelectorInc ;Make Es = Cs so we can write to it
mov es, ax
mov word ptr es:[OldTimerInt],dx
mov word ptr es:[OldTimerInt+2],cx
ELSE
mov ax, DOSGETVECT+TIMERVECT ;Get address of old timer int
int 21h ;vector = es:bx
mov ax,es
mov word ptr cs:[OldTimerInt],bx ;Store in OldTimerInt
mov word ptr cs:[OldTimerInt+2],ax
ENDIF
mov [VsyncHandlerActive],TRUE ;Mark handler as active
IFDEF _DPMI_
mov ax, dpmiSetInt
mov bl, TIMERVECT
mov dx, offset vsyncint
mov cx, cs
int DPMI
ELSE
mov ax,DOSSETVECT+TIMERVECT ;Set the new timer int
push ds
mov dx,cs
mov ds,dx
mov dx,offset vsyncint
int 21h
pop ds
ENDIF
mov al,TIMERMODE ;Reprogram timer 0
out TIMERCONTROL,al
mov ax,ClockRate
out TIMER0,al
mov al,ah
out TIMER0,al
sti
@@Return:
ret
xinstallvsynchandler endp
xremovevsynchandler proc far
cmp [VsyncHandlerActive],FALSE
je short @@Return
mov dx, word ptr cs:[OldTimerInt]
mov cx, word ptr cs:[OldTimerInt+2]
IFDEF _DPMI_
mov ax, dpmiSetInt
mov bl, TIMERVECT
int DPMI
ELSE
push ds
mov ds,cx
mov ax,DOSSETVECT+TIMERVECT ;Restore the old timer int
cli
int 21h
pop ds
ENDIF
mov al,TIMERMODE ;Restore timer 0
out TIMERCONTROL,al
mov al,0
out TIMER0,al
out TIMER0,al
sti
@@Return:
ret
xremovevsynchandler endp
xsetuservsynchandler proc far handlerproc:dword
mov ax, word ptr [handlerproc]
mov dx, word ptr [handlerproc+2]
cli
mov word ptr [UserVsyncHandler],ax
mov word ptr [UserVsyncHandler+2],dx
sti
ret
xsetuservsynchandler endp
END
