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Amiga Format CD 52
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Amiga Format AFCD52 (Issue 136, May 2000).iso
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programming
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mildred
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2000-02-23
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491 lines
.Demo
WBStartup
DEFTYPE.w
*ScrVP._ViewPort=0
IsAGA.b=True ; Defaults to AGA
Dim PlanarBuf.l(2) ; Base address of planar memory to output c2p to (allowed up to triple buffers)
PrefDisplayID.l=$0 ; Default ModeID (Pal:LowRes, or promotes to DoublePal:LowRes)
PrefDisplayWidth.w=320 ; Default Width
PrefDisplayHeight.w=240 ; Default Height
PrefDisplayBuffering.b=3 ; 1..3. 1=Singlebuffered, 2=Doublebuffered, 3=Triplebuffered
PrefDisplayMethod.b=2 ; 0=WritePixelArray8/WriteChunkyPixels, 1=MBlockScroll, 2=WritePixelArray(CGFX)
PrefCGFXLock.b=True ; Wether when Method=1, CGFX LockBitmap will be attempted for safety and to get base address
OSVersion.w=ExecVersion
CGFXAvail.b=False ; Default
#DTAG_DISP=$80000000
#DTAG_DIMS=$80001000
#DTAG_MNTR=$80002000
#DTAG_NAME=$80003000
#LBMI_BASEADDRESS=$84001007
#DIPF_IS_FOREIGN=$80000000
#DIPF_IS_ECS=$00000010
#DIPF_IS_AGA=$00010000
;If Joyb(0)=0 AND Joyb(1)=0 Then Goto SkipSMR
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,0 ; Overscan gadget?
SMRtags(14)\ti_Tag=#ASLSM_DoWidth,0 ; Width gadget?
SMRtags(15)\ti_Tag=#ASLSM_DoHeight,0 ; 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 SkipSMR
;*************************************************************************
; 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
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
.SkipSMR
Function.b CheckLib{Lib$,LibVer}
;Returns wether a specific library is available or not
*lib.l=OpenLibrary_(&Lib$,LibVer)
If *lib
CloseLibrary_ *lib
Function Return True
Else
Function Return False
EndIf
End Function
Function.b InitDisplay{Title$}
;Creates a display for AGA or Graphics-Card output
;Title$=The screen title (not displayed)
SHARED PrefDisplayWidth,PrefDisplayHeight,PrefDisplayBuffering
SHARED *ScrVP,PrefDisplayID,IsAGA,PlanarBuf(),CGFXAvail
;Setup a test screen
Dim ScrTags.TagItem(13)
Rect.Rectangle\MinX=0,0,320,240 ; For test
ScrTags(0)\ti_Tag=#SA_Width,320 ; For test
ScrTags(1)\ti_Tag=#SA_Height,240; For test
ScrTags(2)\ti_Tag=#SA_Depth,8
ScrTags(3)\ti_Tag=#SA_DisplayID,PrefDisplayID
ScrTags(4)\ti_Tag=#SA_Type,$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,False
ScrTags(11)\ti_Tag=#SA_AutoScroll,False
ScrTags(12)\ti_Tag=#TAG_DONE,0
ScrTags(13)\ti_Tag=#TAG_DONE,0
If CGFXAvail
IsAGA=1-(IsCyberModeID_(PrefDisplayID))
Else
; Need to do a test
UsedChip.l=320*240 ; With test params (depth 8)
FreeChip.l=AvailMem_(#MEMF_CHIP)
Forbid_
If ScreenTags(0,Title$,&ScrTags(0))
NowChip.l=AvailMem_(#MEMF_CHIP)
Permit_
If FreeChip-NowChip<UsedChip
IsAGA=False
Else
IsAGA=True
EndIf
VWait 5
Free Screen 0
VWait 5
Else
; Failed to open, so resort to fixed AGA LowRes
Permit_
IsAGA=True
PrefDisplayID=0
PrefDisplayWidth=320
PrefDisplayHeight=240
EndIf
EndIf
If IsAGA
PrefDisplayHeight=240
PrefDisplayWidth AND $FFC0 ; Multiples of 64 for AGA
Else
PrefDisplayWidth AND $FFF0 ; Multiples of 16 for graphics card
EndIf
ScrTags(0)\ti_Tag=#SA_Width,PrefDisplayWidth
Rect.Rectangle\MinX=0,0,PrefDisplayWidth,PrefDisplayHeight
ScrTags(8)\ti_Tag=#SA_DClip,&Rect
If IsAGA
; AGA display
ScrTags(1)\ti_Tag=#SA_Height,PrefDisplayHeight ; Seperate buffers
ScrTags(3)\ti_Tag=#SA_DisplayID,PrefDisplayID
Forbid_
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) ; Chipram bitmap
Memory=(Memory+16) AND $FFFFFFF0 ; Align for move16's
If Memory
CludgeBitMap Loop,PrefDisplayWidth,PrefDisplayHeight,8,Memory ; Depth 8
If Loop=0
ScrTags(12)\ti_Tag=#SA_BitMap,Addr BitMap(0)
If ScreenTags(0,Title$,&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_
Else
; Graphics-card display
ScrTags(1)\ti_Tag=#SA_Height,PrefDisplayHeight*PrefDisplayBuffering
If ScreenTags(0,Title$,&ScrTags(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
EndIf
If Peek.l(Addr Screen(0))
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
Function Return False
EndIf
End Function
.Main
CGFXAvail.b=CheckLib{"cybergraphics.library",0}
If CGFXAvail=False AND PrefDisplayMethod=2 Then PrefDisplayMethod=0
InitPalette 0,256
InitPalette 1,256
If InitDisplay{"Game"}=False Then Goto Finish
LoadRGB32_ *ScrVP,Peek.l(Addr Palette(0))
If PrefDisplayMethod=0 AND OSVersion<40
MBitmap 5,PrefDisplayWidth,PrefDisplayHeight ; Temporary bitmap to allow WPA8 instead of WPL8's
EndIf
MBitmap 0,PrefDisplayWidth,PrefDisplayHeight
If IsAGA Then Mc2pWindow 0,PrefDisplayWidth,PrefDisplayHeight
InitBank 0,320*240,$10000
CludgeBitMap 3,320,240,8,Bank(0)
NEWTYPE.ScaleList
OpWidth.w
DestXOffset.w
SrcXOffset.q
XAddOffset.q
YAddOffset.q
End NEWTYPE
Dim Skale.ScaleList(240)
Dim map.b(256)
MBitmap 1,320,240
MBitmap 2,320,240
MBitmap 3,320,240
buf.b=0
cnt.b=0
angrad.q=Pi/180
.Loop
.TitleIn
VWait 50
If Joyb(0)>0 OR Joyb(1)>0 Then Goto Finish
Use BitMap 3
CPUCls 3
MUseBitmap 1
MCls 0
LoadBitMap 3,"TestImageA320x240.128",0
LoadRGB32_ *ScrVP,Peek.l(Addr Palette(0))
MPlanar16ToBitmap 3,Bank(0)
CPUCls 3
LoadBitMap 3,"EffectPic3.256"
MPlanar16ToBitmap 2,Bank(0)
its.l=0
ResetTimer
c=0
For mag.q=1 To 240 Step 1.0
SourceX.q=160-((mag/2)*(320/240))+((120-(mag/2))*Cos(mag*angrad*3))+0.5
SourceY.q=120-(mag/2)+((120-(mag/2))*Sin(mag*angrad*5))+0.5
OpWidth.w=320
OpHeight.w=240
SourceXAdder.q=mag/240
SourceYAdder.q=mag/240
DestX.w=0
DestY.w=0
For y=0 To 239
Skale(y)\OpWidth=320
Skale(y)\DestXOffset=0
Skale(y)\SrcXOffset=0
Skale(y)\XAddOffset=((240-mag)*0.00001)
Skale(y)\YAddOffset=-((240-mag)*0.000001)
Next y
MUseBitmap 3,1
MPictureDissolveIn 2,c
c+1
MUseBitmap 0
MZoom SourceX,SourceY,SourceXAdder,SourceYAdder,DestX,DestY,OpWidth,OpHeight,False,1,&Skale(0)
Gosub Display
its+1
Next mag
MBlockScroll 0,0,320,240,0,0,3
Gosub Display
its+1
;Goto Report
.BloodlineIn
VWait 50
If Joyb(0)>0 OR Joyb(1)>0 Then Goto Finish
Use BitMap 3
CPUCls 3
LoadBitMap 3,"TestImageB320x240.128",1
MPlanar16ToBitmap 3,Bank(0)
For c=0 To 127
map(c)=128+c
CopyColour 1,0,c,128+c
Next c
For c=128 To 255
map(c)=c
Next c
MReMap &map(0),3
LoadRGB32_ *ScrVP,Peek.l(Addr Palette(0))
CPUCls 3
LoadBitMap 3,"EffectPic3.256"
MPlanar16ToBitmap 2,Bank(0)
its.l=0
ResetTimer
For c=0 To 255
MUseBitmap 3,0
MPictureDissolveIn 2,c
MUseBitmap 0
Gosub Display
its+1
Next c
MBlockScroll 0,0,320,240,0,0,3
Gosub Display
its+1
;Goto Report
Goto Loop
Report:
t=Timer
t=Max(t,1)
its=Max(its,1)
a.q=50.0/(t/its)
WBenchToFront_
WbToScreen 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..."
VWait 20
Repeat
Until Joyb(0)<>0 OR Joyb(1)<>0
Finish:
End
.Display
If IsAGA
Mc2p MBitmapPtr(0),PlanarBuf(buf)
If PrefDisplayBuffering>1
ShowBitMap buf
buf+1
If buf=PrefDisplayBuffering Then buf=0
EndIf
Else
*RP0._RastPort=RastPort(0)
Select PrefDisplayMethod
Case 0 ; WritePixelArray8
If PrefDisplayBuffering>1
*RP1._RastPort=RastPort(Min(PrefDisplayBuffering-1,cnt+1))
If OSVersion<40
MUseBitmap 5
MBlockScroll 0,0,PrefDisplayWidth,PrefDisplayHeight,0,0,0 ; From window in modulo bitmap, to nonmodulo bitmap
MUseBitmap 0
WritePixelArray8_ *RP1,0,0,PrefDisplayWidth-1,PrefDisplayHeight-1,MBitmapPtr(5),0
Else
WriteChunkyPixels_ *RP1,0,0,PrefDisplayWidth-1,PrefDisplayHeight-1,MBitmapPtr(0),MBitmapWidth(0)
EndIf
ClipBlit_ *RP1,0,0,*RP0,0,0,PrefDisplayWidth,PrefDisplayHeight,$C0
If PrefDisplayBuffering=3 Then cnt=1-cnt ; Toggle output buffer
Else
If OSVersion<40
MUseBitmap5
MBlockScroll 0,0,PrefDisplayWidth,PrefDisplayHeight,0,0,0 ; From window in modulo bitmap, to nonmodulo bitmap
MUseBitmap 0
WritePixelArray8_ *RP0,0,0,PrefDisplayWidth-1,PrefDisplayHeight-1,MBitmapPtr(5),0
Else
WriteChunkyPixels_ *RP0,0,0,PrefDisplayWidth-1,PrefDisplayHeight-1,MBitmapPtr(0),MBitmapWidth(0)
EndIf
EndIf
Case 1 ; MBlockScroll
If CGFXAvail AND PrefCGFXLock
Dim CGFXTags.TagItem(1)
CGFXData.l=0
CGFXTags(0)\ti_Tag=#LBMI_BASEADDRESS,&CGFXData
CGFXTags(1)\ti_Tag=#TAG_DONE,0
LockHandle.l=LockBitMapTagList_(*RP0\_BitMap,&CGFXTags(0))
MCludgeBitmap 4,PrefDisplayWidth,PrefDisplayHeight*PrefDisplayBuffering,CGFXData
Else
MCludgeBitmap 4,PrefDisplayWidth,PrefDisplayHeight*PrefDisplayBuffering,*RP0\_BitMap\Planes
EndIf
If PrefDisplayBuffering>1
*RP1._RastPort=RastPort(Min(PrefDisplayBuffering-1,cnt+1))
MBlockScroll 0,0,PrefDisplayWidth,PrefDisplayHeight,0,PrefDisplayHeight+(cnt*PrefDisplayHeight),0 ; From modulo bitmap
ClipBlit_ *RP1,0,0,*RP0,0,0,PrefDisplayWidth,PrefDisplayHeight,$C0
If PrefDisplayBuffering=3 Then cnt=1-cnt ; Toggle output buffer
Else
MBlockScroll 0,0,PrefDisplayWidth,PrefDisplayHeight,0,0,0 ; From modulo bitmap
EndIf
MUseBitmap 0
If CGFXAvail AND (LockHandle<>0) AND PrefCGFXLock Then UnLockBitMap_ LockHandle
Case 2 ; CGFXWriteChunkyPixels
If PrefDisplayBuffering>1
*RP1._RastPort=RastPort(Min(PrefDisplayBuffering-1,cnt+1))
WritePixelArray_ MBitmapPtr(0),0,0,MBitmapWidth(0),*RP1,0,0,PrefDisplayWidth,PrefDisplayHeight,#RECTFMT_LUT8
ClipBlit_ *RP1,0,0,*RP0,0,0,PrefDisplayWidth,PrefDisplayHeight,$C0
If PrefDisplayBuffering=3 Then cnt=1-cnt ; Toggle output buffer
Else
WritePixelArray_ MBitmapPtr(0),0,0,MBitmapWidth(0),*RP0,0,0,PrefDisplayWidth,PrefDisplayHeight,#RECTFMT_LUT8
EndIf
End Select
EndIf
Return