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;__________________________________________________________________________________________________
; File: GDevice.a
;
; Contains: QuickDraw routines that manage GDevices
;
; Written by: Various Authors
;
; Copyright: © 1981-1993 by Apple Computer, Inc., all rights reserved.
;
; Change History (most recent first):
;
; <SM5> 10-19-93 jmp Changed NewGDevice so it more intelligently handles mono-only
; devices.
; <SM4> 4/8/93 IH Add some comments on Display Manager assumptions about
; InitGDevice to InitGDevice header.
; <SM3> 2/4/93 CSS Update from Horror:
; <H2> 7/10/92 SWC Made a change to GetDevPixMap to fix a problem with fixed
; devices. It was generating a new ctSeed unconditionally, which
; caused problems with the IconUtilities package since the Palette
; Manager would say that the tolerance between the device's and
; system CLUTs wasn't close enough to draw a multi-bit icon.
; <SM2> 6/11/92 stb <sm 6/9/92>stb Synched with QDciPatchROM.a, added comments to
; DisposGDevice and InitGDevice.
; <8> 7/24/90 gbm get rid of stupid branch
; <7> 2/20/90 BAL When disposing the LastTxGDevice, reset it to the MainDevice.
; <6> 2/1/90 DAF Add AllocCrsr before ShowCursor in CheckDevices (called from
; InitGraf). Changed ShieldCursor to HideCursor in InitGDevice.
; This is consistent with the CheckDevicesINIT.a.
; <5> 1/29/90 DVB Dont walk nonexistant portlist
; <4> 1/17/90 DVB Touch-up to InitGDevice
; <3> 1/12/90 DVB More InitGDevice
; <2> 1/8/90 DVB Make InitGDevice safer and smarter about changing baseAddr's
; <2.6> 9/25/89 BAL Defered InitGDevices paletteMgr notify until after the GDRect is
; valid.
; <¥2.5> 7/14/89 BAL For Aurora: Final CQD
; <2.4> 7/13/89 DAF FOR AURORA BUILD - Two fixes: 1) corrected startup gamma tables
; from scrn resource in CheckDevices; 2) rewrote fixed device
; color table handling in GetDevPixMap (fixes E-Machines Big
; Picture)
; <2.3> 7/6/89 GGD Changed the JSR OPENPIXMAP to a BSR.L so that it can reach when
; alignment is turned on.
; <2.2> 6/30/89 BAL Changed source to use mainScreen instead of mainScrn
; <2.1> 6/12/89 BAL Altered InitGDevice to not request grayscale versions for 1 and
; 2 bit modes.
; <2.0> 6/10/89 CEL Moved Private.a QuickDraw Equates into proper QuickDraw private
; file (colorequ.a), got rid of QuickDraw nFiles dependencies and
; fixed up necessary filesÉ
; <1.9> 5/30/89 DAF Fixed gdpMap rect offsets when then scrn resource is bad
; <¥1.8> 5/29/89 BAL Blasting in 32-Bit QuickDraw version 1.0 Final
; <¥1.7> 4/12/89 BAL Blasting in 32-Bit QuickDraw 1.0B1
; 4/5/89 DAF Added more validity checking of scrn resource in CheckDevices
; (compares scrnRects,too). If scrn resource is invalid, then
; offset all inactive screens from (0,0) to help out people who
; forget to check scrnActive.
; 4/3/89 DAF Updated InitGDevice to set driver luminence mapping even if
; pixel depth doesn't change.
; 3/26/89 DAF Added linear gamma support from scrn resource; reordered
; CheckDevices; integrated CheckGray into CheckDevices; updated
; SetGray/getCTable support to the new world; plugged InitGDevice
; into Palette Manager; corrected fixed CLUT support in
; GetDevPixmap.
; 12/11/88 BAL Altered getDevPixMap to set high bit of pmVersion for 32 bit
; base addresses.
; <C887> 9/9/87 GWN 32-bit mode fix for Slot manager. Use DCE to get device base.
; 5/27/87 EHB Roll patch into CheckDevices to make sure color/gray is set.
; <C741> 2/2/87 JTC Change to new, word-length <cat><id><sw><hw> constants.
; <C742> 2/2/87 GWN Changed read of video parameters.
; <C720> 1/29/87 GWN Cleared spExtDev field where neccessary.
; <C100> 8/1/86 DAF InitGDevice to handle uninitialized theGDevice.
; 7/29/86 DAF Modified for color manager
; 5/8/86 EHB New Today
;
; To Do:
;__________________________________________________________________________________________________
;EASE$$$ READ ONLY COPY of file Ògdevice.aÓ
; 2.6 BAL 09/25/1989 Defered InitGDevices paletteMgr notify until after the GDRect is valid.
;¥2.5 BAL 07/14/1989 For Aurora: Final CQD
; 2.4 DAF 07/13/1989 FOR AURORA BUILD - Two fixes: 1) corrected startup gamma
; tables from scrn resource in CheckDevices; 2) rewrote fixed device
; color table handling in GetDevPixMap (fixes E-Machines Big Picture)
; 2.3 GGD 07/06/1989 Changed the JSR OPENPIXMAP to a BSR.L so that it can reach when alignment
; is turned on.
; 2.2 BAL 06/30/1989 Changed source to use mainScreen instead of mainScrn
; 2.1 BAL 06/12/1989 Altered InitGDevice to not request grayscale versions for 1 and 2 bit modes.
; 2.0 CEL 06/10/1989 Moved Private.a QuickDraw Equates into proper QuickDraw
; private file (colorequ.a), got rid of QuickDraw nFiles dependencies
; and fixed up necessary filesÉ
; 1.9 DAF 05/30/1989 Fixed gdpMap rect offsets when then scrn resource is bad
;¥1.8 BAL 05/29/1989 Blasting in 32-Bit QuickDraw version 1.0 Final
;¥1.7 BAL 04/12/1989 Blasting in 32-Bit QuickDraw 1.0B1
; File GDevice.a
;
; Copyright Apple Computer, Inc. 1981-1986
; All Rights Reserved
;
;
BLANKS ON
STRING ASIS
MACHINE MC68020
;------------------------------------------------------
;
; QuickDraw Routines to maintain the current grafDevice.
;
; MODIFICATION HISTORY
;
; 8May86 EHB New Today
; 29Jul86 DAF Modified for color manager
; <C100/01Aug86> DAF InitGDevice to handle uninitialized theGDevice.
; <C720/29Jan87> GWN Cleared spExtDev field where neccessary.
; <C741/02Feb87> JTC Change to new, word-length <cat><id><sw><hw> constants.
; <C742/02Feb87> GWN Changed read of video parameters.
; <C887 09Sep87> GWN 32-bit mode fix for Slot manager. Use DCE to get device base.
;
;---------------------------- Macintosh II ROMs -----------------------------
;
; 27May87 EHB Roll patch into CheckDevices to make sure color/gray is set.
;
;---------------------------- 32-bit QuickDraw ------------------------------
;
; 11Dec88 BAL Altered getDevPixMap to set high bit of pmVersion for 32 bit base addresses.
; 26Mar89 DAF Added linear gamma support from scrn resource; reordered CheckDevices;
; integrated CheckGray into CheckDevices; updated SetGray/getCTable support
; to the new world; plugged InitGDevice into Palette Manager; corrected
; fixed CLUT support in GetDevPixmap.
; 3Apr89 DAF Updated InitGDevice to set driver luminence mapping even if pixel depth
; doesn't change.
; 5Apr89 DAF Added more validity checking of scrn resource in CheckDevices (compares
; scrnRects,too). If scrn resource is invalid, then offset all inactive
; screens from (0,0) to help out people who forget to check scrnActive.
NewGDevice PROC EXPORT
IMPORT INITGDEVICE,OPENPIXMAP,SetGDevice,DisposGDHandles
;-------------------------------------------------------------
;
; FUNCTION NewGDevice (refNum: INTEGER; mode: LONGINT) : GDHandle;
;
; Allocate a new GDevice and all its handles, then call InitGDevice
; to initialize it for the specified device in the specified mode.
; The grafDevice and its pixMap are always locked down.
;
; If a memory request is unsuccessful, then a NIL handle is returned
;
; NOTE: Assumes that the driver has already been opened (it has a
; REFNUM and a DCE).
;
PARAMSIZE EQU 6 ; total bytes of parameters
RESULT EQU PARAMSIZE+8 ; LONG, GrafDevice
REFNUM EQU RESULT-2 ; WORD, Driver reference number
MODE EQU REFNUM-4 ; LONG, Mode for video card
LINK A6,#0 ; no locals
MOVEM.L A2/A3,-(SP) ; preserve work registers
CLR.L RESULT(A6) ; indicate failure
MOVE.L theZone,-(SP) ; save the current heap zone
MOVE.L sysZone,theZone ; and get the system heap
MOVEQ #GDRec,D0 ; get size of graf device record
_RESRVMEM ; reserve space for it down low
BNE NOMEM ; => couldn't get it
MOVEQ #GDRec,D0 ; get size of graf device record
_NEWHANDLE ,CLEAR ; allocate the handle
_HLOCK ; and lock it
MOVE.L A0,A2 ; A2 = graf device handle
MOVE.L (A2),A3 ; A3 = graf device pointer
MOVEQ #2,D0 ; initial size of inverse table
_NEWHANDLE ,CLEAR ; get a handle for the inverse table
; allocated in system heap
BNE NOMEM ; => couldn't get it
MOVE.L A0,GDITable(A3) ; save handle to inverse table
MOVEQ #2,D0 ; initial size of expanded cursor data
_NEWHANDLE ,CLEAR ; get a handle for expanded cursor data
; allocated in system heap
BNE.S NOMEM ; => couldn't get it
MOVE.L A0,GDCCXDATA(A3) ; save handle to expanded cursor data
MOVEQ #2,D0 ; initial size of expanded cursor mask
_NEWHANDLE ,CLEAR ; get a handle for the expanded cursor mask
; allocated in system heap
BNE.S NOMEM ; => couldn't get it
MOVE.L A0,GDCCXMASK(A3) ; save handle to expanded cursor mask
MOVEQ #CCSaveRec,D0 ; get size needed by openPixMap
_ResrvMem ; reserve space down low
BNE.S NOMEM ; => couldn't get it
CLR.L -(SP) ; make room for function result
BSR.L OPENPIXMAP ; get an uninitialize pixMap in sysHeap <2.3>
MOVE.L (SP),GDPMap(A3) ; save pixel Map
MOVE.L (SP)+,A0 ; get handle to pixMap
_HLock ; and lock it down
MOVE.L MODE(A6),D0 ; get the mode <C710>
CMP.L #-1,D0 ; if mode = -1, then don't init <C769>
beq.s Done ; => go home <C769>
Bsr TestForGray ; is it monochrome only?
Bne.s @Mono ; => yes, leave GDevice mono
BSET #GDDevType,GDFlags+1(A3) ; else default to color
@Mono MOVE.W REFNUM(A6),-(SP) ; pass device to initialize
MOVE.L MODE(A6),-(SP) ; pass mode to initialize
MOVE.L A2,-(SP) ; and pass gDevice handle
JSR ([$16B8]) ; initialize the device port
DONE MOVE.L (SP)+,theZone ; restore the zone
MOVE.L A2,RESULT(A6) ; return graf device handle
MOVEM.L (SP)+,A2/A3 ; restore work register
UNLINK PARAMSIZE,'NEWGDEVI'
NOMEM MOVE.L A2,-(SP) ; push grafDevice
JSR DisposGDHandles ; and dispose of its handles
BRA.S DONE ; => and return
;
; Ever since the first Edition of Cards & Drivers, the video driver call SetGray has been
; documented. This routine takes a byte (0=color, non-zero=gray), and tells the video
; driver to put itself into luminence mapping mode (gray) or not. This call has been
; defined as Òoptional,Ó so some video drivers may exclude it. Nevertheless, by using
; this call we can make a fairly intelligent guess as to whether to leave a multibit
; GDevice mono or not. Indeed, if we attempt to call SetGray(0), and we get back a non-zero,
; value, then we should leave the GDevice mono. All Apple video drivers have done this with
; their monochrome-only displays.
;
With VDPageInfo
TestForGray
@SaveEm Reg A0-A1/D0 ;
Movem.l @SaveEm,-(Sp) ; Borrow a few registers for a while.
Suba.w #ioQElSize,Sp ; Allocate an I/O param block on the stack.
Movea.l Sp,A0 ; Point to it.
Subq #4,Sp ; Allocate a CS param block on the stack.
Movea.l Sp,A1 ; Point to it.
Clr.b csMode(A1) ; Say that we want mapping off.
; Set up for the Control call:
Move.w RefNum(A6),ioRefNum(A0) ; ioRefNum,
Move.w #cscSetGray,csCode(A0) ; csCode,
Move.l A1,csParam(A0) ; csParam.
_Control ,Immed ; SetGray.
Bne.s @Error ; If failed, then just leave.
Tst.b csMode(A1) ; Otherwise, see if we got back what we set.
Bra.s @Done ;
@Error Moveq #0,D0 ; Just set up to leave things alone.
@Done Adda.w #ioQElSize+4,Sp ; Restore the stack space we used.
Movem.l (Sp)+,@SaveEm ; Restore the regs we borrowed.
Rts ; Vamoose.
Endwith
DisposGDevice PROC EXPORT
EXPORT DisposGDHandles
;-------------------------------------------------------------
;
; PROCEDURE DisposGDevice (GDH: GDHandle);
;
; disposes of the gDevice record and its handles
;
MOVE.L (SP)+,A1 ; get return address
MOVE.L (SP),-(SP) ; push the grafDevice
BSR.S DisposGDHandles ; and dispose of its handles
; as seen in QDciPatchROM.a <sm 6/9/92>stb
MOVE.L (SP)+,A0 ; get the grafDevice
cmp.l LastTxGDevice,A0 ; are we disposing it? <BAL 20Feb90>
bne.s @noProb ; no, continue <BAL 20Feb90>
move.l MainDevice,LastTxGDevice ; yes, reset it. <BAL 20Feb90>
@noProb ; <BAL 20Feb90>
_DisposHandle ; dispose of it
JMP (A1) ; and exit
DisposGDHandles
MOVE.L A1,-(SP) ; save A1
MOVE.L 8(SP),A1 ; get handle to GDevice
MOVE.L (A1),A1 ; point to GDevice
MOVE.L GDPMap(A1),-(SP) ; push pixMap handle
MOVE.L GDITable(A1),D0 ; get inverse table
BEQ.S @0 ; => none
MOVE.L D0,A0 ; else get it
_DisposHandle ; and dispose it
@0 MOVE.L GDCCXData(A1),D0 ; get cursor data
BEQ.S @1 ; => none
MOVE.L D0,A0 ; else get it
_DisposHandle ; and dispose it
@1 MOVE.L GDCCXMask(A1),D0 ; get cursor mask
BEQ.S @2 ; => none
MOVE.L D0,A0 ; else get it
_DisposHandle ; and dispose it
@2 MOVE.L (SP)+,D0 ; get pixMap handle
BEQ.S @3 ; => it's not there
MOVE.L D0,-(SP) ; else push it again
_DisposPixMap ; and dispose of the pixMap
@3 MOVE.L (SP)+,A1 ; restore A1
MOVE.L (SP)+,(SP) ; strip parameter
RTS ; and return
; as seen in QDciPatchROM.a verbatim <sm 6/9/92>stb
InitGDevice PROC EXPORT
WITH VDPageInfo ;<1.1>
IMPORT OneBitData,GetDevPixMap
;-------------------------------------------------------------
;
; PROCEDURE InitGDevice (refNum: INTEGER; mode: LONGINT; GDH: GDHandle);
;
; Initialize the specified device to the specified mode. The GDevice
; data is placed into the provided handle.
;
; If mode = -1 then the driver is not called. It is assumed that the pixmap
; has been set up before InitGDevice is called.
;
; Now has support for GDevices with baseAddrs that change across depths
; (Trident card) in a MultiFinder-friendly way.
;
; CAUTION: this routine is used during ROM boot; various Macintosh functions
; may not yet be available! <dvb - found out the hard way>
;
; CAUTION: Display Manager counts on the way some of the flags are used. Do
; not change without testing the resolution flipping in display manager.
;
; Are there patch implications (especially for the mainScreen flag) that
; mean I should handle this in a different way? Are there patches that count
; on these flags? Here are the flags Display Manager changes:
;
; ramInit -- Display Manager clears ramInit bit so rect will be fetched from the video card.
; gdMode -- Display Manager clears. When switching to a different resolution the enabled
; functional sResource has changed, however the spID is frequently the same for the
; same depth. By clearing gdMode, we know that InitGDevice will not bail because
; it thinks the modes are the same.
; mainScreen -- Display Manager clears mainScreen bit because it does not want InitGDevice to
; mess with the ports. Display Manager has more things to do to the ports (at a higher
; level) than it would be appropriate to do here. Some day we may roll in here, but
; for now I clear this bit to make sure InitGDevice does not try to fix ports.
;
IGDVars RECORD {A6Link},DECREMENT
result DS.B 0 ; no result
REFNUM DS.B 2
MODE DS.B 4 ; LONG, mode for video card
GDH DS.B 4 ; LONG, handle to devPort
return DS.B 4 ; the return address
A6Link DS.B 4 ; our link
IOPBlk DS.B IOVQElSize ; [64] parameter blk for I/O calls
VidParms DS.B 12 ; [12] size of mode params
GDHState DS.B 2 ; [word] lock state of GDH
GDPState DS.B 2 ; [word] lock state of GDP
SaveDevice DS.B 4 ; [long] saved device handle
oldBaseAddr DS.B 4 ; old base address, for later comparison
oldPort DS.B 4 ; thePort, before we got here
oldColor DS.B 8 ; a colorSpec used to reinstantiate fg/bk
DS.B 356
VARSIZE DS.B 0 ; size of locals
ENDR
WITH IGDVars
LINK A6,#VARSIZE ; allocate stack frame
MOVEM.L D3/A2-A4,-(SP) ; save off work registers
MOVE.L ExpandMem,A0
MOVE.L $1FC(A0),A1
TST.B $B5(A1)
BNE.S @true
CLR $276(A0)
@true
MOVE.L GDH(A6),A0 ; get the gDevice handle
_HGetState ; get the current lock state
MOVE D0,GDHState(A6) ; save the state
_HLOCK ; and lock down the gDevice
MOVE.L (A0),A2 ; get pointer to gDevice record
MOVE.L GDPMap(A2),A0 ; get handle to pixMap
MOVE.L (A0),A1 ; A1->pixmap
MOVE.L baseAddr(A1),oldBaseAddr(A6) ; save the base address, for later portfixing
_HGetState ; get the current lock state of the pixmap
MOVE D0,GDPState(A6) ; save the state
_HLOCK ; lock it down
MOVE.L (A0),A3 ; keep pointer in A3
MOVE.L theGDevice,SaveDevice(A6) ; save theGDevice
TST.B QDExist ; qd around?
BNE.S @noShield ; no, don't shield cursor
BTST #screenDevice,gdFlags(A2) ; is it screen (check hi byte with #>8)
BEQ.S @noShield
JSR ([$F48])
@noShield
; initialize the GDevice's mode and refnum
SF.B -$6E(A6)
MOVE REFNUM(A6),GDRefNum(A2) ; set up RefNum
MOVE.L MODE(A6),D0 ; get the mode
CMP.L MinusOne,D0 ; is the mode -1?
BEQ ModeOK ; if so, then don't call the driver
; set up the driver parameter block in case we need to use it
LEA IOPBlk(A6),A0 ; point to parameter block
CLR.L ioCompletion(A0) ; no completion routine
CLR.W ioVRefNum(A0) ; no volRefNum
MOVE RefNum(A6),ioRefNum(A0) ; set device's refnum
LEA VidParms(A6),A1 ; point to params for GetMode
MOVE.L A1,csParam(A0) ; point to param list
CMP.L GDMode(A2),D0 ; has the mode changed?
BEQ.S GrayOrColor ; => no, so don't set depth
ST.B -$6E(A6)
MOVE.L D0,GDMode(A2) ; set up mode
; setup the gDevice fields for the new screen depth
CLR GDCCDepth(A2) ; invalidate cursor depth <C837>
MOVEM.L A0/A1,-(SP) ; save these regs
MOVE REFNUM(A6),-(SP) ; push refnum
MOVE.L MODE(A6),-(SP) ; push mode
MOVE.L GDPMap(A2),-(SP) ; pixMap handle
PEA GDType(A2) ; point to device type
JSR GetDevPixMap ; read in pixMap from device
MOVEM.L (SP)+,A0/A1 ; restore them
; first, set the mode (A0 points to IOPB, A1 to control parameter block)
MOVE #2,csCode(A0) ; csc_GetMode
MOVE.L mode(A6),D0 ; get the mode
MOVE D0,csMode(A1) ; set desired mode
CLR csPage(A1) ; set page 1
CLR.L csData(A1) ; no additional data
_Control ,IMMED ; SetMode(Mode,Page,Data);
; then gray the screen
MOVE #5,csCode(A0) ; csc_GrayPage
_Control ,IMMED ; paint current page gray
; set the device to color or monochrome, according to GDFlags
GrayOrColor
MOVE GDFlags(A2),D0 ; get flags word
NOT D0 ; flip all bits
AND #1,D0 ; clear all but low bit
MOVE.B D0,csMode(A1) ; csMode = color/gray scale
MOVE #6,csCode(A0) ; csc_SetGray
_Control ,IMMED ; set color or monochrome
; if the device has a color table, set the device's color table
CMP #ClutType,GDType(A2) ; is there a lookup table?
BNE.S NoTbl ; =>no, don't set one
MOVE.L pmTable(A3),A0 ; get handle to color table
_HLock ; lock down the color table
;+++ LEA VidParms(A6),A1 ; point to params for SetEntries
MOVE.L (A0),A0 ; get ctabPtr <DAF>
CLR.W csStart(A1) ; start at zero, use sequence mode <DAF>
MOVE.W ctSize(A0),csCount(A1) ; for the length of the table <DAF>
LEA ctTable(A0),A0 ; get pointer to colorspecs <DAF>
MOVE.L A0,csTable(A1) ; color table pointer is first param <DAF>
LEA IOPBlk(A6),A0 ; point to parameter block
MOVE.W #3,csCode(A0) ; csc_SetEntries
MOVE.L A1,csParam(A0) ; move addr of parms into block
_Control ,IMMED ; SetEntries(ColorTable);
MOVE.L pmTable(A3),A0 ; get handle to color table
_HUnlock ; unlock the color table
NoTbl
; if CLUT or fixed color table, build inverse table
CMP #DirectType,GDType(A2) ; should there be an inverse table?
BEQ.S ModeOK ; =>no inverse table
MOVE.L pmTable(A3),-(SP) ; push color table handle
MOVE.L GDITable(A2),-(SP) ; push inverse table handle
MOVEQ #4,D0 ; make 4-4-4 inverse tables
MOVE D0,GDResPref(A2) ; save in GDevice
MOVE D0,-(SP) ; and push res
JSR ([$16E4]) ; and generate table
ModeOK
MOVE.L ([$2B6],$1FC),A0
TST.B $B5(A0)
BEQ @L13
MOVE $14(A2),D0
BTST.L #$D,D0
BEQ @L13
BTST.L #$A,D0
BEQ @L13
TST (A2)
BEQ @L13
TST.B -$6E(A6)
BEQ @L13
MOVE.L $22(A2),-$6C(A6)
MOVE.L $26(A2),-$68(A6)
TST.B (QDExist)
BNE @L9
MOVE.L A5,-$7A(A6)
LEA.L -$7E(A6),A5
MOVE.L $6(A3),$22(A2)
MOVE.L $A(A3),$26(A2)
MOVE.L (ScrnBase),-$1BC(A6)
MOVE.L -$58(A6),D1
CMP.L (ScrnBase),D1
BNE.S @L0
MOVE $14(A2),D0
BTST.L #$B,D0
BEQ @L0
MOVE.L (A3),(ScrnBase)
@L0 PEA.L -$82(A6)
_InitGraf
PEA.L -$1B8(A6)
_OpenPort
MOVE.L D2,-(SP)
MOVEQ.L #$0,D1
MOVEQ.L #$1,D2
MOVE.L (DeviceList),D0
@L1 BEQ.S @L5
MOVE.L D0,A0
CMPA.L $8(A6),A0
MOVE.L (A0),A0
BNE.S @L2
BSET.B #$7,$14(A0)
BNE.S @L4
BRA.S @L3
@L2 BTST.B #$7,$14(A0)
BEQ.S @L4
BCLR.B #$7,$14(A0)
@L3 OR D2,D1
@L4 LSL #$1,D2
MOVE.L $1E(A0),D0
BRA.S @L1
@L5 MOVE.L (SP)+,D2
MOVE D1,-(SP)
SUBQ.L #$4,SP
_NewRgn
MOVE.L (SP),-(SP)
MOVE.L (SP),-(SP)
PEA.L $6(A3)
_RectRgn
LEA.L -$1B8(A6),A0
MOVE.L $18(A0),-(SP)
MOVE.L (SP),-(SP)
_UnionRgn
_DisposRgn
MOVE $C(A3),D0
SUB $8(A3),D0
MOVE -$66(A6),D1
SUB -$6A(A6),D1
SUB D1,D0
ASR #$1,D0
MOVE D0,-$1C6(A6)
MOVE $A(A3),D0
SUB $6(A3),D0
MOVE -$68(A6),D1
SUB -$6C(A6),D1
SUB D1,D0
ASR #$1,D0
MOVE D0,-$1C8(A6)
MOVE $8(A3),D0
ADD -$1C6(A6),D0
MOVE.L $6(A3),-$76(A6)
MOVE $A(A3),-$72(A6)
MOVE D0,-$70(A6)
PEA.L -$76(A6)
MOVE.L (A5),A1
PEA.L -$10(A1)
_FillRect
MOVE $6(A3),D0
ADD -$1C8(A6),D0
MOVE $C(A3),-$70(A6)
MOVE D0,-$72(A6)
PEA.L -$76(A6)
MOVE.L (A5),A1
PEA.L -$10(A1)
_FillRect
MOVE $A(A3),D0
SUB -$1C8(A6),D0
MOVE.L $A(A3),-$72(A6)
MOVE $8(A3),-$74(A6)
MOVE D0,-$76(A6)
PEA.L -$76(A6)
MOVE.L (A5),A1
PEA.L -$10(A1)
_FillRect
MOVE $C(A3),D0
SUB -$1C6(A6),D0
MOVE $6(A3),-$76(A6)
MOVE D0,-$74(A6)
PEA.L -$76(A6)
MOVE.L (A5),A1
PEA.L -$10(A1)
_FillRect
MOVE (SP)+,D1
BEQ.S @L8
MOVE.L (DeviceList),D0
@L6 BEQ.S @L8
MOVE.L D0,A0
MOVE.L (A0),A0
LSR #$1,D1
BCC.S @L7
BSET.B #$7,$14(A0)
TST D1
BEQ.S @L8
@L7 MOVE.L $1E(A0),D0
BRA.S @L6
@L8 PEA.L -$1B8(A6)
_ClosePort
MOVE.L -$1BC(A6),(ScrnBase)
MOVE.L -$6C(A6),$22(A2)
MOVE.L -$68(A6),$26(A2)
MOVE.L -$7A(A6),A5
@L9 MOVE D2,-(SP)
MOVE.L $16(A2),A0
MOVE.L (A0),A0
MOVE $4(A0),D0
ANDI #$7FFF,D0
MOVE $A(A0),D1
SUB $6(A0),D1
ADD -$6C(A6),D1
SUB -$68(A6),D1
ASR #$1,D1
MULU D1,D0
MOVE $C(A0),D1
SUB $8(A0),D1
ADD -$6A(A6),D1
SUB -$66(A6),D1
ASR #$1,D1
MOVE $20(A0),D2
CMPI #$8,D2
BGT.S @L11
BEQ.S @L12
@L10 ASR #$1,D1
ASL #$1,D2
CMPI #$8,D2
BLT.S @L10
BRA.S @L12
@L11 ASR #$3,D2
MULU D2,D1
@L12 EXT.L D1
ADD.L D1,D0
ADD.L D0,(A0)
MOVE (SP)+,D2
@L13 LEA.L $6(A3),A0
LEA.L $22(A2),A1
MOVE $14(A2),D0
BTST.L #$A,D0
BEQ.S @L14
EXG.L A0,A1
@L14 MOVE.L (A0)+,(A1)+
MOVE.L (A0)+,(A1)+
TST.B (QDExist)
BNE @L20
MOVE.L (PortList),D1
BEQ @L20
ADDQ.L #$1,D1
BEQ @L20
BTST.L #$B,D0
BEQ @L19
PEA.L -$5C(A6)
_GetPort
MOVE.L (MainDevice),(TheGDevice)
MOVE.L (PortList),A4
MOVE.L (A4),A4
MOVE (A4),D3
BRA.S @L17
@L15 MOVE.L (PortList),A4
MOVE.L (A4),A4
MOVE.L $2(A4,D3.W*4),A4
MOVE.L A4,-(SP)
_SetPort
MOVE.L -$58(A6),D1
BTST.B #$7,$6(A4)
BEQ.S @L16
MOVE.L $2(A4),A4
MOVE.L (A4),A4
CMP.L (A4),D1
BNE.S @L17
MOVE.L (A3),(A4)
MOVE $4(A3),$4(A4)
MOVE.L $1E(A3),$1E(A4)
MOVE.L $22(A3),$22(A4)
MOVE.L $26(A3),$26(A4)
PEA.L -$64(A6)
MOVE.L (SP),-(SP)
MOVE.L (SP),-(SP)
MOVE.L (SP),-(SP)
_SaveFore
_RestoreFore
_SaveBack
_RestoreBack
BRA.S @L17
@L16 CMP.L $2(A4),D1
BNE.S @L17
MOVE.L (A3),$2(A4)
MOVE $4(A3),D1
ANDI #$7FFF,D1
MOVE D1,$6(A4)
@L17 DBF D3,@L15
MOVE.L -$5C(A6),-(SP)
_SetPort
MOVE.L -$58(A6),D1
CMP.L (ScrnBase),D1
BNE.S @L18
MOVE.L (A3),(ScrnBase)
@L18 MOVE.L -$58(A6),D1
MOVE.L (A5),A0
CMP.L -$7A(A0),D1
BNE.S @L19
MOVE.L (A3),-$7A(A0)
@L19 BTST.B #$D,$14(A2)
BEQ.S @L20
_AllocCursor
_ShowCursor
@L20 BSR.S NewFunc
MOVE.L (ExpandMem),A0
MOVE D0,$276(A0)
;
; notify the Palette Manager that the mode has changed
;
; <2.6> moved after GDRect has been adjusted <2.6>
CMP.L #-1,PMgrHandle ; has the Palette Mgr been initialized?
BEQ.S @noPMgr ; nope, so skip this
MOVE.L GDH(A6),-(SP) ; push the device handle
_RestoreDeviceClut ; call the Palette Manager Unhook device vector
@noPMgr
MOVE.L SaveDevice(A6),theGDevice ; restore theGDevice
MOVE.L GDPMap(A2),A0 ; get pixMap handle
MOVE GDPState(A6),D0 ; get the lock state
_HSetState ; restore prior state
MOVE.L GDH(A6),A0 ; get the gDevice handle
MOVE GDHState(A6),D0 ; get the lock state
_HSetState ; restore prior state
MOVEM.L (SP)+,D3/A2-A4 ; restore work registers
UNLINK result-return-4,'INITGDEV'
NewFunc
MOVE.L (TheGDevice),D0
BEQ @L32
MOVE.L (MainDevice),D1
CMP.L D0,D0
BNE.S @L22
MOVE.L (DeviceList),D0
BEQ.S @L32
@L22 MOVE.L D0,A0
MOVE.L (A0),A0
MOVE.L $1E(A0),D1
BEQ.S @L32
@L23 MOVE.L D1,A1
MOVE.L (A1),A1
MOVE.L $22(A1),D0
CMP $24(A0),D0
BGT.S @L27
BLT.S @L24
SWAP D0
CMP $22(A0),D0
BGT.S @L28
BLT.S @L25
MOVE.L $26(A1),D0
CMP $28(A0),D0
BLT.S @L29
BGT.S @L26
BRA.S @L30
@L24 SWAP D0
CMP $22(A0),D0
BGT.S @L31
@L25 MOVE.L $26(A1),D0
CMP $28(A0),D0
BLT.S @L31
@L26 SWAP D0
CMP $26(A0),D0
BLT.S @L31
BRA.S @L30
@L27 SWAP D0
CMP $22(A0),D0
BLT.S @L31
@L28 MOVE.L $26(A1),D0
CMP $28(A0),D0
BGT.S @L31
@L29 SWAP D0
CMP $26(A0),D0
BGT.S @L31
@L30 MOVEQ.L #$1,D0
RTS
@L31 MOVE.L $1E(A1),D1
BNE.S @L23
MOVE.L $1E(A0),D0
BNE.S @L22
@L32 MOVEQ.L #$0,D0
RTS
GetDevPixMap PROC EXPORT
IMPORT CopyHandle, GetCTSeed, RSetHSize
;----------------------------------------------------------------
;
; PROCEDURE GetDevPixMap(refNum: INTEGER; mode: LONGINT; PMH: PixMapHandle;VAR DevType:INTEGER);
;
; Calls the slot Manager to fill out the pixMap with info from the specified
; mode of the specified device. The device need not be configured to that
; mode.
;
; GetDevPixMap is called by InitGDevice.
;
;----------------------------------------------------------------
PARAMSIZE EQU 14 ; total bytes of parameters
REFNUM EQU PARAMSIZE+8-2 ; WORD, Driver reference number
MODE EQU REFNUM-4 ; LONG, Mode for video card
PMH EQU MODE-4 ; LONG, PixMap Handle
DEVTYPE EQU PMH-4 ; LONG, VAR DevType
MYBLOCK EQU -spBlock.SPBLOCKSIZE ; allocate room for parameter block <Cxxx>
PMHState EQU MyBlock-2 ; save pixMap lockState
VARSIZE EQU PMHState-$9A ; size of locals
WITH spBlock,vpBlock ;<C742>
LINK A6,#VARSIZE ; allocate stack frame
MOVEM.L D3-D5/A2-A4,-(SP) ; preserve work registers
; lock down the pixMap and get pointer in A2
CLR.B -$D3(A6)
MOVE.L PMH(A6),A0 ; get handle to pixMap
_HGetState ; get the current state
MOVE D0,PMHState(A6) ; save current state
_HLock ; lock it down
MOVE.L (A0),A2 ; get pointer in A2
; look in the unit table for the specified device
MOVE REFNUM(A6),D0 ; get the refNum
NOT D0 ; refNum -> unitnum
ASL #2,D0 ; get offset in unitTable
MOVE.L UTableBase,A1 ; get the base of the unit table
MOVE.L (A1,D0),A3 ; A3 = handle to the DCE
MOVE.L (A3),A1 ; get pointer to the DCE
LEA.L -$D2(A6),A4
LEA.L -$82(A6),A0
MOVE.L A4,$1C(A0)
MOVE $18(A1),$18(A0)
MOVE #$A,$1A(A0)
CLR.L $C(A0)
CLR.L $12(A0)
CLR $16(A0)
DC.W $A205 ; _PBStatusImmed
BNE.S @nope
MOVE.L $2(A4),-$3E(A6)
MOVE.L $8(A4),-$42(A6)
MOVE.L $2A(A1),D3
LEA.L -$AC(A6),A0
LEA.L -$C2(A6),A4
MOVE.L A0,$6(A4)
MOVE.L $10(A6),D0
MOVE D0,$4(A4)
MOVE.L -$3E(A6),(A4)
LEA.L -$82(A6),A0
MOVE.L A4,$1C(A0)
MOVE $14(A6),$18(A0)
MOVE #$12,$1A(A0)
CLR.L $C(A0)
CLR.L $12(A0)
CLR $16(A0)
DC.W $A205 ; _PBStatusImmed
BNE.S @nope
LEA.L -$C2(A6),A4
MOVE.B #$1,-$D3(A6)
MOVE.L -$42(A6),D3
MOVE.L D3,$2A(A1)
MOVE.L $8(A6),A1
MOVE.L $E(A4),D4
MOVE D4,(A1)
LEA.L -$38(A6),A0
LEA.L -$AC(A6),A1
BRA.S @saveVals
@nope
; get the resource list for the specified device
LEA MYBLOCK(A6),A0 ; point to parameter block
MOVE.B dCtlSlot(A1),spSlot(A0) ; get slot number
MOVE.B dCtlSlotID(A1),spID(A0) ; get ID
MOVE.B dCtlExtDev(A1),spExtDev(A0) ; External Device ID
_sRsrcInfo ; get a pointer to the sResource list. <Cxxx>
BNE BadSlot ; => something wrong
; BaseAddr := dctlDevBase + MBaseOffset(Added later) <C887 09Sep87 GWN>
MOVE.L dCtlDevBase(A1),D3 ; Get the 24-bit base address. <C887 09Sep87 GWN>
MOVE.L MODE(A6),D0 ; get the mode
MOVE.B D0,spId(A0) ; pass the requested mode
_sFindStruct ; get pointer to list for that mode
BNE BadSlot ; => something wrong
MOVE.L spsPointer(A0),A4 ; A4 = pointer to list for that mode
; get devType
MOVE #CLUTType,D4 ; assume device type = CLUT
MOVE.B #mDevType,spId(A0) ; device type
_sReadWord ; go read it
BNE.S @CLUT ; => if none, assume CLUT
MOVE spResult+2(A0),D4 ; get device type
@CLUT MOVE.L DEVTYPE(A6),A1 ; get pointer to device type
MOVE D4,(A1) ; return device type
; get video parameter sBlock and save values as needed <C742>
MOVE.B #mVidParams,spId(A0) ; get the parameters <C742>
_sGetBlock ; (in sBlock form) <C742>
BNE BadSlot ; => something wrong
MOVE.L spResult(A0),A1 ; save the pointer to the block <C742>
@saveVals
ADD.L vpBaseOffset(A1),D3 ; calculate baseAddr
MOVE.L D3,(A2)+ ; save baseAddr
; get rowbytes, bounds, and version.
MOVE.W vpRowBytes(A1),D0 ; Number of bytes between scan lines. <C742>
OR #PMFlag,D0 ; set pixMap flag
MOVE D0,(A2)+ ; save rowbytes
MOVE.L vpBounds(A1),(A2)+ ; read into our bounds <C742>
MOVE.L vpBounds+4(A1),(A2)+ ; rect is eight bytes <C742>
MOVE.W vpVersion(A1),(A2)+ ; pixMap version number <C742>
if ADDRMODEFLAG then ; <BAL 11Dec88>
tst.w vpVersion(a1) ; is it standard? <BAL 11Dec88>
bne.s @useTheirs ; no, leave it alone <BAL 11Dec88>
move.w #fAddr32clean,-2(a2) ; yes, set 32 bit addressing flag <BAL 11Dec88>
@useTheirs
endif
; clear packType, packSize fields
CLR (A2)+ ; packType := 0
CLR.L (A2)+ ; packSize := 0
; get hRes, vRes, pixelType, pixelSize, cmpType, cmpSize and planebytes.
MOVE.L vpHRes(A1),(A2)+ ; horizontal resolution <C742>
MOVE.L vpVRes(A1),(A2)+ ; vertical resolution <C742>
MOVE.W vpPixelType(A1),(A2)+ ; the pixel type <C742>
MOVE.W vpPixelSize(A1),D5 ; D5 = pixel size <C742>
MOVE.W D5,(A2)+ ; the pixel size <C742>
MOVE.W vpCmpCount(A1),(A2)+ ; the component count <C742>
MOVE.W vpCmpSize(A1),(A2)+ ; the component size <C742>
MOVE.L vpPlaneBytes(A1),(A2)+ ; offset from one plane to another <C742>
; dispose of the sBlock <C742>
TST.B -$D3(A6)
BNE.S @dont
MOVE.L A1,spsPointer(A0) ; <C742>
_SDisposePtr ; <C742>
MOVE.L A4,spsPointer(A0) ; restore pointer to list <C742>
@dont
; use DevType to initialize the color table
CMP #FixedType,D4 ; is it fixed?
BEQ.S GetFromSlot ; =>yes, get from card
CMP #CLUTType,D4 ; is it color lookup?
BNE.S DirectCLUT ; =>no, must be direct; get unique seed <BAL 07Jul88>
; Load in the color table and copy it to our handle.
GetClut CLR.L -(SP) ; make room for function result
MOVE D5,-(SP) ; push resource ID
JSR ([$1660]) ; load in the color table resource
MOVE.L (SP)+,D0 ; did we get one? <C769>
BEQ TableOK ; => no, just punt <BAL 04Sep88>
MOVE.L D0,-(SP) ; push new handle for dispose <C1/9>
MOVE.L D0,-(SP) ; push source handle <C1/9>
MOVE.L (A2),-(SP) ; push destination handle <C1/9>
JSR ([$1A14]) ; copy table into our handle
JSR ([$1690]) ; and dispose of new color table
BRA.S TableOK ; => and continue
;
; Read the color table from the ROM. This code is a little different than it's ancestor. <2.3>
; Rather than expecting a cSpecArray, this expects that mTable points to a color table
; image (including header). It's not bad to change this since there was a bug that
; prevented it from working at all before (spSize had been read as a word, rather than
; long, so it would never make the correct calculation). Get the fixed color table as
; a pointer, put in a new ctSeed, then make the pointer into a handle.
;
GetFromSlot MOVE.B #mTable,spID(A0) ; the fixed table <2.3>
_SReadPBSize ; find the table and get it's size <2.3>
BNE.S GetClut ; => something wrong, use default table <2.3>
SUB.L #4,spSize(A0) ; adjust for slot block header <2.3>
MOVE.L spSize(A0),D0 ; get size of table <2.3>
MOVE.L (A2),A0 ; get existing color table handle <2.3>
_SetHandleSize ; set it to the new size <2.3>
MOVE.L (A0),A1 ; deref handle <2.3>
LEA MYBLOCK(A6),A0 ; point to parameter block
MOVE.L A1,spResult(A0) ; put handle in destination <2.3>
_sReadStruct ; read the table from the ROM <2.3>
;¥¥¥ <SM3> CSS rollin patch GetDevPixMapPatch from horror
MOVE.L ctSeed(A1),D0 ; get the current seed <H2>
BEQ.S @GetNewSeed ; -> it's zero, so generate a new one <H2>
CMPI.L #minSeed,D0 ; is it a resource ID? <H2>
BLE.S @UseOriginalSeed ; -> yes, assume we know what we're doing <H2>
@GetNewSeed SUBQ #4,SP ; make room for function result <2.3>
JSR ([$16A0]) ; get a new, unique ctable seed
MOVE.L (SP)+,ctSeed(A1) ; put in the new seed <2.3>
@UseOriginalSeed
; transindex/ctflags set below <2.3>
;¥¥¥ <SM3> CSS end rollin GetDevPixMapPatch from Horror
MOVE.L A4,spsPointer(A0) ; Restore the pointer to mode list. <C742>
bra.s TableOK
DirectCLUT ; Set up fake CLUT for direct devices <BAL 07Jul88>
MOVE.L PMH(A6),A0 ; get handle to pixMap
move.l (a0),a0 ; get pixMap ptr
move cmpSize(a0),d0 ;
mulu cmpCount(a0),d0 ; compute seed value
move.l pmTable(A0),a0 ; get clut handle
move.l (a0),a0 ; clut ptr
move.l d0,(a0) ; set up seed
TableOK move.l (a2),a0 ; get pmTable <BAL 29Mar89>
move.l (a0),a0 ; get ptr to clut <BAL 29Mar89>
move.w #$8000,TransIndex(a0) ; set Device clut flag <BAL 29Mar89>
ADDQ #4,A2 ; skip over table
CLR.L (A2)+ ; clear pmReserved
; Error, bad video card.
BadSlot
DONE MOVE.L PMH(A6),A0 ; get handle to pixMap
MOVE PMHState(A6),D0 ; get prior state
_HSetState ; restore lock state
GOHOME MOVEM.L (SP)+,D3-D5/A2-A4 ; restore work registers
UNLINK PARAMSIZE,'GETDEVPI'
GoBadSlot ADDQ #4,SP ; strip pointer off stack
BRA.S BadSlot ; and return with error
ENDWITH
CheckDevices PROC EXPORT
WITH VDPageInfo ;<1.1>
IMPORT CopyHandle
;----------------------------------------------------------
;
; PROCEDURE CheckDevices;
;
; Look at the device list to see if it needs to be initialized. If so, read
; in the resource of type 'scrn'. If it is found, configure the devices as
; described in that resource. The format of the 'scrn' resource is:
;
; [count] ; [word] number of devices in resource
; FOR I := 1 TO COUNT DO
; [sResource Type] ; [word] spDrvrH of device n
; [slot] ; [word] slot number of device n
; [dCtlDevBase] ; [long] the dCtlDevBase of device n
; [mode] ; [word] the sRsrcID for the desired mode
; [flagMask] ; [word] masks off all bits used in flags
; [flags] ; [word] indicates the state of the device
; ; bit 0 = 0 if monochrome; 1 if color
; ; bit 11 = 1 if this device is main screen
; ; bit 15 = 1 if the screen is active
; [colorTable] ; [word] resource id of desired color table (-1=none)
; [gammaTable] ; [word] resource id of gamma table (-1=none)
; [global Rect] ; [rect] global rectangle for this device
; [CtlCount] ; [word] number of control calls following
; FOR J := 1 TO CtlCount DO
; [csCode] ; [word] control code for this call
; [length] ; [word] number of bytes in the param blk
; [param blk] ; [length] data to be passed in control call
; END;
; END;
;
; CheckDevices is called by InitGraf.
RTS
;-------------------------------------------------------------
;
; ROUTINES FOR ACCESSING THE DEVICE LIST
;
GetGDevice PROC EXPORT
;----------------------------------------------------------
;
; FUNCTION GetGDevice: GDHandle;
;
; Return the handle to the current device
;
MOVE.L (SP)+,A0 ; get return address
MOVE.L theGDevice,(SP) ; return device handle
JMP (A0) ; and return
SetGDevice PROC EXPORT
;----------------------------------------------------------
;
; PROCEDURE SetGDevice (GDH: GDHandle);
;
; Set the device specifed in GDH to be the current device
;
; This routine needs to close the current video device if
; there is one, then it should open the new one. It should
; also call the device to let it set up anything it might
; need to set up (e.g. change the bottleneck procs).
;
MOVE.L (SP)+,A0 ; get the return address
MOVE.L (SP)+,theGDevice ; set the specified handle
JMP (A0) ; and return
GETDEVICELIST PROC EXPORT
;-------------------------------------------------------------
;
; FUNCTION GETDEVICELIST: GDHandle;
;
; RETURNS A HANDLE TO THE FIRST ELEMENT IN THE DEVICE LIST
;
MOVE.L (SP)+,A0 ; GET RETURN ADDRESS
MOVE.L DeviceList,(SP) ; RETURN DEVICE LIST
JMP (A0) ; AND RETURN
GETMAINDEVICE PROC EXPORT
;-------------------------------------------------------------
;
; FUNCTION GETMAINDEVICE: GDHandle;
;
; RETURNS A HANDLE TO THE MAIN SCREEN DEVICE
;
MOVE.L (SP)+,A0 ; GET RETURN ADDRESS
MOVE.L MainDevice,(SP) ; RETURN DEVICE LIST
JMP (A0) ; AND RETURN
GETNEXTDEVICE PROC EXPORT
;-------------------------------------------------------------
;
; FUNCTION GETNEXTDEVICE(GDH: GDHandle): GDHandle;
;
; RETURNS A HANDLE TO THE NEXT SCREEN DEVICE
; IF THERE IS NO NEXT DEVICE, RETURNS NIL
;
MOVE.L (SP)+,A0 ; GET RETURN ADDRESS
MOVE.L (SP)+,A1 ; GET GDH
MOVE.L (A1),A1 ; POINT TO DEVICE
MOVE.L GDNextGD(A1),(SP) ; RETURN NEXT DEVICE
JMP (A0) ; AND RETURN
TestDeviceAttribute PROC EXPORT
;-------------------------------------------------------------
;
; FUNCTION TestDeviceAttribute(GDH: GDHandle; attribute: INTEGER): BOOLEAN;
;
; Tests the specified attribute, returns TRUE if attribute is true
;
MOVE.L (SP)+,A1 ; GET RETURN ADDRESS
MOVE (SP)+,D0 ; GET ATTRIBUTE
MOVE.L (SP)+,A0 ; GET GDH
CLR.B (SP) ; ASSUME FALSE
MOVE.L (A0),A0 ; POINT TO DEVICE
MOVE GDFlags(A0),D1 ; GET FLAGS WORD
BTST D0,D1 ; TEST ATTRIBUTE
BEQ.S IsFalse ; => ATTRIBUTE NOT SET
ADD.B #1,(SP) ; ELSE RETURN TRUE
IsFalse JMP (A1) ; AND RETURN
SetDeviceAttribute PROC EXPORT
;-------------------------------------------------------------
;
; PROCEDURE SetDeviceAttribute(GDH: GDHandle; attribute: INTEGER; state: Boolean);
;
; Sets the specified attribute to true or false
;
MOVE.L (SP)+,A1 ; GET RETURN ADDRESS
MOVE.B (SP)+,D0 ; GET BOOLEAN
MOVE (SP)+,D1 ; GET ATTRIBUTE
MOVE.L (SP)+,A0 ; GET GDH
MOVE.L (A0),A0 ; POINT TO DEVICE
MOVE GDFLAGS(A0),D2 ; GET FLAGS WORD
TST.B D0 ; TEST BOOLEAN
BNE.S SetIt ; =>SET FLAG
BCLR D1,D2 ; CLEAR ATTRIBUTE
BRA.S SDAShare ; RETURN VALUE AND RETURN
SetIt BSET D1,D2 ; SET ATTRIBUTE
SDAShare MOVE D2,GDFLAGS(A0) ; RETURN IT
JMP (A1) ; AND RETURN
GETMAXDEVICE PROC EXPORT
;-------------------------------------------------------------
;
; FUNCTION GETMAXDEVICE(r: Rect): GDHandle;
;
; RETURNS A HANDLE TO THE DEEPEST SCREEN DEVICE
; THAT INTERSECTS THE SPECIFIED GLOBAL RECTANGLE.
;
PARAMSIZE EQU 4 ; TOTAL BYTES OF PARAMETERS
RESULT EQU PARAMSIZE+8 ; LONG, GRAFDEVICE
RECT EQU PARAMSIZE+8-4 ; LONG, ADDR OF GLOBAL RECTANGLE
DSTRECT EQU -8 ; RECT, VAR FOR SECTRECT
VARSIZE EQU DSTRECT ; SIZE OF LOCALS
LINK A6,#VARSIZE ; ALLOCATE STACK FRAME
MOVEM.L D3/A3,-(SP) ; SAVE WORK REGISTERS
CLR.L RESULT(A6) ; ASSUME NO INTERSECTION
MOVEQ #0,D3 ; MAX DEPTH = 0
MOVE.L DEVICELIST,A3 ; GET FIRST ELEMENT IN DEVICE LIST
NEXTGD MOVE.L (A3),A0 ; POINT TO DEVICE
TST GDFLAGS(A0) ; IS IT ACTIVE?
BPL.S SKIPGD ; =>NO, SKIP IT
CLR.B -(SP) ; MAKE ROOM FOR BOOLEAN RESULT
MOVE.L RECT(A6),-(SP) ; PUSH SPECIFIED RECTANGLE
PEA GDRECT(A0) ; PUSH DEVICE'S RECTANGLE
PEA DSTRECT(A6) ; PUSH DESTINATION RECT (IGNORED)
_SECTRECT ; IS THE RECT IN THE DEVICE
TST.B (SP)+ ; TEST RESULT
BEQ.S SKIPGD ; => NO INTERSECTION
MOVE.L (A3),A0 ; POINT TO DEVICE
MOVE.L GDPMAP(A0),A0 ; GET PIXMAP
MOVE.L (A0),A0 ; POINT TO PIXMAP
MOVE PIXELSIZE(A0),D0 ; GET PIXEL DEPTH
CMP D3,D0 ; COMPARE TO SAVED DEPTH
BLE.S SKIPGD ; => NO BIG DEAL
MOVE D0,D3 ; ELSE UPDATE MAX DEPTH
MOVE.L A3,RESULT(A6) ; AND RETURN RESULT
SKIPGD MOVE.L (A3),A0 ; GET DEVICE
MOVE.L GDNEXTGD(A0),D0 ; GET NEXT DEVICE
MOVE.L D0,A3 ; SAVE IT
BNE.S NEXTGD
MOVEM.L (SP)+,D3/A3 ; RESTORE WORK REGISTERS
UNLINK PARAMSIZE,'GETMAXDE' ; STRIP PARAMS AND RETURN
GETDEVPIX PROC EXPORT
;-------------------------------------------------------------
;
; UTILITY GetDevPix;
;
; Returns a pointer to theGDevice's pixMap in A0
;
MOVE.L theGDevice,A0 ; GET A HANDLE TO THE GRAFDEVICE
MOVE.L (A0),A0 ; GET A POINTER TO THE GRAFDEVICE
MOVE.L GDPMAP(A0),A0 ; GET HANDLE TO THE DEVICE'S PIXMAP
SHARE MOVE.L (A0),A0 ; GET PIXMAP POINTER
RTS
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