home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Amiga Format CD 52
/
Amiga Format AFCD52 (Issue 136, May 2000).iso
/
-serious-
/
programming
/
basic
/
mildred
/
mildred.lha
/
lha
/
ScrollDemo.lha
/
ScrollDemo.ascii
< prev
next >
Wrap
Text File
|
1999-03-07
|
12KB
|
364 lines
WBStartup
DEFTYPE.w
MCPU Processor
Mc2pCPUmode Processor
*ScrVP._ViewPort=0
IsAGA.b=False
Dim PlanarBuf.l(2) ; Base address of planar memory to output c2p to (allowed up to triple buffers)
PrefDisplayID.l=$0 ; Default ModeID
PrefDisplayWidth.w=320 ; Default Width
PrefDisplayHeight.w=240 ; Default Height
PrefDisplayBuffering.b=3 ; 1..3. 1=Singlebuffered, 2=Doublebuffered, 3=Triplebuffered
SMRMinX=320 ; Minimum width
SMRMinY=240 ; Minimum height
SMRMaxX=640 ; Maximum width
SMRMaxY=480 ; Maximum height
#DTAG_DISP=$80000000
#DTAG_DIMS=$80001000
#DTAG_MNTR=$80002000
#DTAG_NAME=$80003000
NEWTYPE.SMode
DID.l
DWidth.l
DHeight.l
DDepth.w
DType.w
End NEWTYPE
DEFTYPE.Hook myhook ; The hook for ASL tag as &myhook
myhook\h_Entry=?hook
MOVE.l a5,globalbase
funcret.l=0
Dim SMRtags.TagItem(17)
SMRtags(0)\ti_Tag=#ASLSM_InitialLeftEdge,160 ; X coord of requester
SMRtags(1)\ti_Tag=#ASLSM_InitialTopEdge,0 ; Y coord of requester
SMRtags(2)\ti_Tag=#ASLSM_InitialWidth,300 ; Width of requester
SMRtags(3)\ti_Tag=#ASLSM_InitialHeight,400 ; Height of requester
SMRtags(4)\ti_Tag=#ASLSM_InitialDisplayID,$21000 ; Default ModeID (Pal:LowRes)
SMRtags(5)\ti_Tag=#ASLSM_InitialDisplayDepth,8 ; Default depth (8-bit usually)
SMRtags(6)\ti_Tag=#ASLSM_InitialDisplayWidth,PrefDisplayWidth
SMRtags(7)\ti_Tag=#ASLSM_InitialDisplayHeight,PrefDisplayHeight
SMRtags(8)\ti_Tag=#ASLSM_InitialOverscanType,1 ; Default overscan type (Text)
SMRtags(9)\ti_Tag=#ASLSM_InitialInfoOpened,1 ; Info window?
SMRtags(10)\ti_Tag=#ASLSM_InitialInfoLeftEdge,350 ; X coord of info window
SMRtags(11)\ti_Tag=#ASLSM_InitialInfoTopEdge,50 ; Y coord of info window
SMRtags(12)\ti_Tag=#ASLSM_DoDepth,0 ; Depth gadget? (Generally NO for chunky 8-bit)
SMRtags(13)\ti_Tag=#ASLSM_DoOverscanType,1 ; Overscan gadget?
SMRtags(14)\ti_Tag=#ASLSM_DoWidth,1 ; Width gadget?
SMRtags(15)\ti_Tag=#ASLSM_DoHeight,1 ; Height gadget?
SMRtags(16)\ti_Tag=#ASLSM_FilterFunc,&myhook ; Address of callback hook routine
SMRtags(17)\ti_Tag=#TAG_DONE,0
*sreq.SMode=0
*sreq=AllocAslRequest_(2,&SMRtags(0)\ti_Tag)
ok.b=AslRequest_(*sreq,&SMRtags(0)\ti_Tag)
If ok<>0
PrefDisplayID.l=*sreq\DID
PrefDisplayWidth.w=*sreq\DWidth
PrefDisplayHeight.w=*sreq\DHeight
EndIf
If (*sreq) Then FreeAslRequest_(*sreq)
Goto PrefsSkip
;*************************************************************************
; This is the statement that the hook will call. Put the label before
; the statement you want to jump to.
Runerrsoff
.hook_jump:
Statement hook{*dahook.Hook, modeID.l, *smr.ScreenModeRequester}
; We're inside the hook, and supposedly we should be able to do whatever
; we want.
; Filter modeID's here
SHARED funcret.l,SMRMinX,SMRMinY,SMRMaxX,SMRMaxY
DEFTYPE.DisplayInfo DisInfoBuf
DEFTYPE.DimensionInfo DimInfoBuf
DEFTYPE.MonitorInfo MonInfoBuf
DEFTYPE.NameInfo NamInfoBuf
;Refer to Includes/Graphics/DisplayInfo.h or view newtypes
IDhandle.l=FindDisplayInfo_(modeID)
GetDisplayInfoData_ IDhandle,&DisInfoBuf,SizeOf.DisplayInfo,#DTAG_DISP,0
GetDisplayInfoData_ IDhandle,&DimInfoBuf,SizeOf.DimensionInfo,#DTAG_DIMS,0
GetDisplayInfoData_ IDhandle,&MonInfoBuf,SizeOf.MonitorInfo,#DTAG_MNTR,0
GetDisplayInfoData_ IDhandle,&NamInfoBuf,SizeOf.NameInfo,#DTAG_NAME,0
;Do tests. True=Mode is valid, False=mode is invalid.
;See newtypes for DisplayInfo,DimensionInfo,MonitorInfo and NameInfo for things to further test
If DimInfoBuf\MaxDepth<>8
;No true-colour modes, only 8-bit
funcret=False
Else
funcret=True
EndIf
End Statement
;**********************
; Hook
Macro goto_hook
JSR `1+6
End Macro
globalbase: Dc.l 0
hook: ;This hook is called by the filter hook callback from screenmode requester, per item
; Store registers
MOVEM.l d1-d7/a0-a6,-(a7) ; Not d0!
; Put parameters into dregs ready for a statement
MOVE.l a0,d0
MOVE.l a1,d1
MOVE.l a2,d2
; Get global variable base
MOVE.l globalbase,a5
; Goto hook statement
!goto_hook{hook_jump}
GetReg d0,funcret ; return accept/discard
; Restore registers
MOVEM.l (a7)+,d1-d7/a0-a6 ; Not d0!
RTS
;**********************
Runerrson
PrefsSkip
Function.b InitDisplay{Title$}
;Creates a display for AGA or Graphics-Card output
;Title$=The screen title (not displayed)
SHARED PrefDisplayWidth.w,PrefDisplayHeight.w,PrefDisplayBuffering.b
SHARED *ScrVP._ViewPort,PrefDisplayID.l,IsAGA.b,PlanarBuf()
;Open a test screen first to a) test for AGA or GFX-Card, and b) because the dimensions might be
;too large to open a chipram screen, and the dimensions for AGA have not yet been reduced to within limits
Dim ScrTags.TagItem(13)
Rect.Rectangle\MinX=0,0,320,240 ; For test
ScrTags(0)\ti_Tag=#SA_Width,320 ; For test
ScrTags(1)\ti_Tag=#SA_Height,240; For test
ScrTags(2)\ti_Tag=#SA_Depth,8
ScrTags(3)\ti_Tag=#SA_DisplayID,PrefDisplayID
ScrTags(4)\ti_Tag=#SA_Type,$F
ScrTags(5)\ti_Tag=#SA_Quiet,True
ScrTags(6)\ti_Tag=#SA_ShowTitle,False
ScrTags(7)\ti_Tag=#SA_Behind,True
ScrTags(8)\ti_Tag=#SA_DClip,&Rect ; For test
ScrTags(9)\ti_Tag=#SA_Exclusive,False
ScrTags(10)\ti_Tag=#SA_Draggable,True
ScrTags(11)\ti_Tag=#SA_AutoScroll,False
ScrTags(12)\ti_Tag=#TAG_DONE,0
ScrTags(13)\ti_Tag=#TAG_DONE,0
UsedChip.l=((320 LSR 3)*240)*8 ; With test params (depth 8)
FreeChip.l=AvailMem_(#MEMF_CHIP)
Forbid_
If ScreenTags(0,Title$,&ScrTags(0))<>0 ; Test for GFX-Card or AGA
NowChip.l=AvailMem_(#MEMF_CHIP)
Permit_
If FreeChip-NowChip<UsedChip
; Graphics card screen
IsAGA=False
PrefDisplayWidth AND $FFF0 ; For gfx-cards, width to nearest 16
ScrTags(0)\ti_Tag=#SA_Width,PrefDisplayWidth
Rect.Rectangle\MinX=0,0,PrefDisplayWidth,PrefDisplayHeight
ScrTags(1)\ti_Tag=#SA_Height,PrefDisplayHeight*PrefDisplayBuffering
ScrTags(8)\ti_Tag=#SA_DClip,&Rect
VWait 5 ; seems to be necessary (safer)
Free Screen 0
VWait 5
If ScreenTags(0,Title$,&ScrTags(0))<>0
For Loop.w=0 To PrefDisplayBuffering-1
If Loop=0 Then WFlags.l=$1900 Else WFlags.l=$800
If Window(Loop,0,PrefDisplayHeight*Loop,PrefDisplayWidth,PrefDisplayHeight,WFlags,"",0,0)=0 Then Function Return False
Menus Off
ScreensBitMap 0,Loop
*TmpBmp.bitmap=Addr BitMap(Loop)
Offset.l=*TmpBmp\_ebwidth*(PrefDisplayHeight*Loop)
For DLoop.w=0 To 8-1 ; Depth of 8
*TmpBmp\_data[DLoop]=*TmpBmp\_data[DLoop]+Offset
Next DLoop
Next Loop
Else
Function Return False
EndIf
Else
; AGA screen
IsAGA=True
PrefDisplayWidth AND $FFC0 ; For AGA, width to nearest 64
ScrTags(0)\ti_Tag=#SA_Width,PrefDisplayWidth
Rect.Rectangle\MinX=0,0,PrefDisplayWidth,PrefDisplayHeight
ScrTags(1)\ti_Tag=#SA_Height,PrefDisplayHeight ; Seperate buffers
ScrTags(8)\ti_Tag=#SA_DClip,&Rect
ScrTags(3)\ti_Tag=#SA_DisplayID,PrefDisplayID
Forbid_
VWait 5 ; seems to be necessary (safer)
Free Screen 0
VWait 5
For Loop.w=0 To PrefDisplayBuffering-1
If Loop=0 Then WFlags.l=$1900 Else WFlags.l=$800
If AvailMem_(#MEMF_CHIP)>=(PrefDisplayWidth*PrefDisplayHeight)+16
Memory.l=AllocMem((PrefDisplayWidth*PrefDisplayHeight)+16,$10002) ; Chip bitmap
Memory=(Memory+16) AND $FFFFFFF0 ; Align for move16's
If Memory<>0
CludgeBitMap Loop,PrefDisplayWidth,PrefDisplayHeight,8,Memory ; Depth 8
If Loop=0
ScrTags(12)\ti_Tag=#SA_BitMap,Addr BitMap(0)
If ScreenTags(0,Title$,&ScrTags(0))=0
Permit_
Function Return False
EndIf
EndIf
If Window(Loop,0,0,PrefDisplayWidth,PrefDisplayHeight,WFlags,"",0,0)=0 Then Function Return False
Menus Off
Else
Permit_
Function Return False
EndIf
Else
Permit_
Function Return False
EndIf
PlanarBuf(Loop)=Memory
Next Loop
Permit_
EndIf
DEFTYPE.DimensionInfo DimInfoBuf
GetDisplayInfoData_ FindDisplayInfo_(PrefDisplayID) AND $FFFFFFFF,&DimInfoBuf,SizeOf.DimensionInfo,#DTAG_DIMS,0
PrefDisplayLeft.w=((DimInfoBuf\TxtOScan\MaxX)-PrefDisplayWidth)/2
PrefDisplayTop.w=((DimInfoBuf\TxtOScan\MaxY)-PrefDisplayHeight)/2
*Scr._Screen=Peek.l(Addr Screen(0))
*ScrVP=ViewPort(0)
*ScrVP\DxOffset=PrefDisplayLeft,PrefDisplayTop
ScrollVPort_ *ScrVP
RethinkDisplay_
Menus Off
If *ScrVP\DHeight<>PrefDisplayHeight
Forbid_
*Scr\Height=PrefDisplayHeight ; Enforce y clipping
Permit_
EndIf
ScreenToFront_ *Scr
Function Return True
Else
Permit_
Function Return False
EndIf
End Function
.Main
InitBank 0,PrefDisplayWidth*PrefDisplayHeight,$10000
CludgeBitMap 0,PrefDisplayWidth,PrefDisplayHeight,8,Bank(0)
InitPalette 0,256
LoadBitMap 0,"Stencil.IFF"
If MBitmap(0,PrefDisplayWidth,PrefDisplayHeight)=0 Then Goto Finish
MPlanar16ToBitmap 0,Bank(0)
MMakeStencil 0
LoadBitMap 0,"Image.IFF",0
MPlanar16ToBitmap 0,Bank(0)
If InitDisplay{"Game"}=False Then Goto Finish
ShowPalette 0
*RP._RastPort=RastPort(0)
Mc2pWindow 0,PrefDisplayWidth,PrefDisplayHeight ; Need this line in some form or other
MCludgeBitmap 4,PrefDisplayWidth,PrefDisplayHeight*PrefDisplayBuffering,*RP\_BitMap\Planes
If MBitmap(1,PrefDisplayWidth,PrefDisplayHeight)=0 Then Goto Finish
MBlockScroll 0,0,PrefDisplayWidth,PrefDisplayHeight,0,0,0
MUseBitmap 0
If MShape(0,64,64)=0 Then Goto Finish
MTable 0,256*256
If ReadFile(0,"Merge50.Table")=0 Then Goto Finish
ReadMem 0,MTablePtr,256*256
CloseFile 0
MTable 1,256*256
If ReadFile(0,"Subtract&Tint.Table")=0 Then Goto Finish
ReadMem 0,MTablePtr,256*256
CloseFile 0
MMakeStencil 1
.Loop
buf.b=0
its.l=0
cnt.b=0
ResetTimer
While Joyb(0)=0 AND Joyb(1)=0
xpos=Min(SMouseX,PrefDisplayWidth-65)
ypos=Min(SMouseY,PrefDisplayHeight-65)
MBlockScroll xpos,ypos,64,64,64,0,1
MScroll xpos,ypos,64,64,0,0,1
MUseTable 0
MMaskScrollMode MReMapMode
MMaskScroll xpos,ypos,64,64,128,0,1
MUseTable 1
MScroll 192,0,64,64,192,0,1
MMaskScroll xpos,ypos,64,64,192,0,0
MMaskScrollMode MColourMode
MScroll 256,0,64,64,256,0,1
MInk its
MMaskScroll xpos,ypos,64,64,256,0,0
MScrollBitmapToShape xpos,ypos,64,64,0,0,1
MShapeXFlip 0
MShapeYFlip 0
MSScrollCut On
MSScrollShapeToBitmap 0,0,64,64,128,64,0
MUseTable 0
MMaskScrollMode MReMapMode
MScroll 64,64,64,64,64,64,1
MMaskScroll xpos,ypos,64,64,64,64,0
MScroll xpos,ypos,64,64,192,64,0
MScroll 0,63,64,64,0,64,0
MScroll 1,64,64,64,0,64,0
MBlockScrollBitmapToShape 64,64,64,64,0,0,0
MShapeYFlip 0
MBlockScrollShapeToBitmap 0,0,64,64,256,64,0
;Display
If IsAGA
Mc2p MBitmapPtr(0),PlanarBuf(buf)
ShowBitMap buf
If PrefDisplayBuffering>1
buf+1
If buf=PrefDisplayBuffering Then buf=0
EndIf
Else
MUseBitmap 4
If PrefDisplayBuffering>1
MBlockScroll 0,0,PrefDisplayWidth,PrefDisplayHeight,0,PrefDisplayHeight+(cnt*PrefDisplayHeight),0
Else
MBlockScroll 0,0,PrefDisplayWidth,PrefDisplayHeight,0,0,0
EndIf
MUseBitmap 0
*RP0._RastPort=RastPort(0)
*RP1._RastPort=RastPort(Min(PrefDisplayBuffering-1,1+cnt))
ClipBlit_ *RP1,0,0,*RP0,0,0,PrefDisplayWidth,PrefDisplayHeight,$C0
If PrefDisplayBuffering=3 Then cnt=1-cnt ; Toggle output buffer
EndIf
its+1
Wend
;Report
t=Timer
t=Max(t,1)
its=Max(its,1)
a.q=50.0/(t/its)
WBenchToFront_
FindScreen 1
Window 2,16,16,300,40,0,"Test results",1,0
WindowOutput 2
NPrint a," frames per second"
NPrint " "
NPrint "Press mouse/joy button..."
Repeat
Until Joyb(0)<>0 OR Joyb(1)<>0
Finish:
End