PureBasic DLL + Blitz image

Hi it is possible to send a blitzimage to a purebasic dll ???
I have try some stuff but nothing ;(

I have try this purebasic code

ProcedureDLL Pixelate(*bank.byte)
Result = CatchImage(0, *bank)

Result = StartDrawing(ImageOutput() )
y = 0
#StepX = 10
StepY = Round(#StepX*Height/Width, 0)
For x = 0 To Width/2-5 Step #StepX
Box(x, y, Width-2*x, Height-2*y ,RGB(Random(255),Random(255),Random(255)))
y + StepY ; the same as y = y + StepY
Next x

StopDrawing()
MessageRequester("Information",Str(ImageWidth()) ,#PB_MessageRequester_Ok)
EndProcedure


And this blitz code

Graphics 640,480,16,2

MyImage=CreateImage(256,256,1)
Pixelate(MyImage)
DrawImage MyIMage,0,0
WaitKey

The Decls :
.lib "Examples.dll"
Pixelate%(bank*)

As far as I know, the variable MyImage will not point directly to the bank of the image. You would have to use lockedpixels() to find the address. You can do this in BlitzPlus, and in B3D with the functions, that Andreas Blixt made, which adds lockedpixels() command to b3d, and posted on Blitzcoder in the showcase section.

Thx zawran

no problem :)

I have made some tests and here is the code :) i hope help you :)

; Taille :
; Byte = 1
; Word=2
; Float = 4
; Long=4


Graphics 640,480,16,2
SetBuffer BackBuffer()


;OutPut=CreateGridImage(200,200,32)

MyIMage=LoadImage("K:\Blitz3D - Test\TOK Sample\samples/GALVPLAT.JPG")
Output=ApplyImageEffect(MyIMage,1)

While Not KeyHit(1)
	Cls

DrawImage Output,10,10
	DrawImage Output,MouseX(),MouseY()
	Flip
Wend

WaitKey
End

Function CreateGridImage(Width,Height,Size)
	MyBank=CreateImageBank(Width,Height)
	DLL_CreateGridImage(MyBank,BankSize(MyBank),Size)
	Output=BankToImage( MyBank)
	FreeBank MyBank
	
	Return Output
End Function

Function ApplyImageEffect(Image,Effect)
	MyBank=ImageToBank( Image)
	DLL_ApplyImageEffect(MyBank,BankSize(MyBank),Effect)
	Output=BankToImage( MyBank)
	FreeBank MyBank
	
	Return Output
End Function

Function CreateImageBank(SizeX,SizeY)
	bankImage = CreateBank(5)
	
	SizeOfImage =SizeX*SizeY

	ResizeBank bankImage, (SizeOfImage*12) + 9 ;(12 bytes per long for the image info + 9 extra bytes for header)

	Poke_L bankImage,0,SizeX
	Poke_L bankImage,4,SizeY

	Return bankImage
End Function

Function ImageToBank( bufferImage)
	bankImage = CreateBank(5)
	Bank_OldBuffer = GraphicsBuffer();get the handle for the current buffer
	
	SizeOfImage = ImageWidth(bufferImage)*ImageHeight(bufferImage)

	ResizeBank bankImage, (SizeOfImage*12) + 9 ;(12 bytes per long for the image info + 9 extra bytes for header)

	Poke_L bankImage,0,ImageWidth(bufferImage);store the width in the bank
	Poke_L bankImage,4,ImageHeight(bufferImage);store the height

	iBankPointer =8 : Steping=4
			
	SetBuffer ImageBuffer(bufferImage)
	LockBuffer ImageBuffer(bufferImage)

	For iLoopX = 0 To ImageWidth(bufferImage)-1
		For iLoopY = 0 To ImageHeight(bufferImage)-1

			argb=ReadPixelFast(iLoopX,iLoopY)
			
			col_red = (ARGB Shr 16) And $ff 
			col_green =(ARGB Shr 8) And $ff 
			col_blue = ARGB And $ff

			Poke_L bankImage,ibankPointer,col_red
			iBankPointer = iBankPointer + steping
			
			Poke_L bankImage,ibankPointer,col_green
			iBankPointer = iBankPointer + steping
			
			Poke_L bankImage,ibankPointer,col_blue
			iBankPointer = iBankPointer + steping
		Next
	Next

	UnlockBuffer ImageBuffer(bufferImage)
	SetBuffer Bank_OldBuffer 

	Return bankImage
End Function

Function BankToImage( bankImage)
	Width=Peek_L (bankImage,0)
	Height=Peek_L (bankImage,4)

	bufferImage=CreateImage(Width,Height)

	iBankPointer =8 : Steping=4

	Bank_OldBuffer = GraphicsBuffer()
	SetBuffer ImageBuffer(bufferImage)
	LockBuffer ImageBuffer(bufferImage)

	For iLoopX = 0 To ImageWidth(bufferImage)-1
		For iLoopY = 0 To ImageHeight(bufferImage)-1
			Red=PeekByte (bankImage,ibankPointer)
			iBankPointer = iBankPointer + steping
						
			Green=PeekByte (bankImage,ibankPointer)
			iBankPointer = iBankPointer + steping
			
			Blue=PeekByte (bankImage,ibankPointer)
			iBankPointer = iBankPointer + steping
		
			WritePixelFast(iLoopX,iLoopY,ARGB(Red,Green,Blue))
		Next
	Next

	UnlockBuffer ImageBuffer(bufferImage)
	SetBuffer Bank_OldBuffer

	Return bufferImage
End Function

Function ARGB(Red,Green,Blue)
	Return (blue Or (green Shl 8) Or (red Shl 16) Or ($ff000000))
End Function 

;pure code
ProcedureDLL Peek_L(*bank,offset)
  ProcedureReturn PeekL(*bank+offset)
EndProcedure

ProcedureDLL.f Peek_F(*bank,offset)
  ProcedureReturn PeekF(*bank+offset)
EndProcedure

ProcedureDLL.w Peek_W(*bank,offset)
  ProcedureReturn PeekW(*bank+offset)
EndProcedure

ProcedureDLL.b Peek_B(*bank,offset)
  ProcedureReturn PeekB(*bank+offset)
EndProcedure

ProcedureDLL.s Peek_S(*bank,offset)
  ProcedureReturn PeekS(*bank+offset)
EndProcedure



ProcedureDLL Poke_L(*bank,offset,value.l)
  PokeL(*bank+offset,value.l)
EndProcedure

ProcedureDLL Poke_F(*bank,offset,value.f)
  PokeF(*bank+offset,value.f)
EndProcedure

ProcedureDLL Poke_W(*bank,offset,value.w)
  PokeW(*bank+offset,value.w)
EndProcedure

ProcedureDLL Poke_B(*bank,offset,value.b)
  PokeB(*bank+offset,value.b)
EndProcedure

ProcedureDLL Poke_S(*bank,offset,value.s)
  PokeS(*bank+offset,value.s)
EndProcedure


ProcedureDLL.l DLL_ApplyImageEffect(*bank,banksize,Effect)
  SizeX=PeekL(*bank)
  SizeY=PeekL(*bank+4)
  
  TotalSize=(SizeX+SizeY*12)+9 
  
  iBankPointer =8
  steping=4
  
  If CreateImage(0, SizeX, SizeY)
    StartDrawing(ImageOutput())
    
    For x=0 To SizeX-1 
      For y=0 To SizeY-1 
        r=PeekL(*bank+iBankPointer)
        iBankPointer = iBankPointer + steping
        
        g=PeekL(*bank+iBankPointer)
        iBankPointer = iBankPointer + steping

        
        b=PeekL(*bank+iBankPointer)
        iBankPointer = iBankPointer + steping
        
        Plot (x,y,RGB(r,g,b))
      Next
    Next
    
    Select Effect
      Case 1
        For x=0 To SizeX-1 Step 8
          For y=0 To SizeY-1 Step 8 
            Line(0, y, SizeY*2, 0,RGB(0,0,0)) 
            Line(x, 0, 0, SizeX*2,RGB(0,0,0)) 
          Next
        Next
    EndSelect
    
    iBankPointer =8
    steping=4
    
    For x=0 To SizeX-1 
      For y=0 To SizeY-1 
        Col=Point(x,y)
        
        PokeL(*bank+iBankPointer,Red(Col))
        iBankPointer = iBankPointer + steping
        
        PokeL(*bank+iBankPointer,Green(Col))
        iBankPointer = iBankPointer + steping
        
        PokeL(*bank+iBankPointer,Blue(Col))
        iBankPointer = iBankPointer + steping
      Next
    Next
    
    StopDrawing()
    FreeImage(0) 
  EndIf 
EndProcedure

ProcedureDLL.l DLL_CreateGridImage(*bank,banksize,GridSize)
  SizeX=PeekL(*bank)
  SizeY=PeekL(*bank+4)
  
  TotalSize=(SizeX+SizeY*12)+9 
  
  StepX=((SizeX)/GridSize)
  StepY=((SizeY)/GridSize)
  
  If CreateImage(0, SizeX , SizeY )
    StartDrawing(ImageOutput())
    
   
    For x=0 To SizeX-1
      For y=0 To SizeY-1
        
        Pos_X=Pos_X+StepX
        Pos_Y=Pos_Y+StepY
        
        Line(0, Pos_Y , SizeY , 0 ,RGB(255,255,0)) 
        Line(Pos_X , 0 , 0 , SizeX ,RGB(255,255,0)) 
 

      Next
    Next
    
    
    iBankPointer =8
    steping=4
    
    For x=0 To SizeX-1 
      For y=0 To SizeY-1 
        Col=Point(x,y)
        
        PokeL(*bank+iBankPointer,Red(Col))
        iBankPointer = iBankPointer + steping
        
        PokeL(*bank+iBankPointer,Green(Col))
        iBankPointer = iBankPointer + steping
        
        PokeL(*bank+iBankPointer,Blue(Col))
        iBankPointer = iBankPointer + steping
      Next
    Next
    
    StopDrawing()
    FreeImage(0) 
  EndIf 
EndProcedure

; Delcs file

.lib "Examples.dll"
Peek_L%(bank*,offset)
Peek_F#(bank*,offset) 
Peek_W%(bank*,offset)
Peek_S$(bank*,offset) 
Peek_B%(bank*,offset) 

Poke_L(bank*,offset,value%)
Poke_F(bank*,offset,value#) 
Poke_W(bank*,offset,value%)
Poke_S(bank*,offset,value$)
Poke_B(bank*,offset,value%) 

DLL_ApplyImageEffect%(bank*,size,effect)
DLL_CreateGridImage%(bank*,size,step)

GetImageWidth%(bank*)
GetImageHeight%(bank*)

Don't know if you know, but with lockedpixels() you can actually peek and poke into image buffer directly from blitz.

How ?? do you think it's more speed ?

Peeking & Poking from a DLL works out about the same speed.

Filax: If it's of any use, PeekMemInt(ImageBuffer(img)+12) & PeekMemInt(TextureBuffer(tex)+12) are both valid IDirectDrawSurface pointers and can be passed to a DLL and manipulated with the DX7SDK. You can do surface Blits, access mipmaps, all kinds of stuff.

Tom

The attempts I did with purebasic dll and blitz pointed towards it being just as fast to do the pixel manipulations directly from blitz with the lockedpixels() command and peek/poke. Don't know if a dll made with C++ would help, as I don't know how to program in that language. I will find an example of using the peek/poke directly on an imagebuffer when I get home, and post it.

i use powerbasic with inline asm for that and it is realy fast

This isn't the best effect ever, but it shows how you can poke directly into imagebuffers:

Graphics 640,480,32,2

	temp = CreateImage( 64, 64 )
	MidHandle temp

	SetBuffer BackBuffer()
	While Not KeyHit(1)
	Cls

	; poking directly to the backbuffer imagebank
	LockBuffer BackBuffer()
		imagebank = LockedPixels()
		For y = 0 To 127
			offset = LockedPitch() * y
			For x = 0 To 127
				PokeInt ( imagebank, offset + x * 4, Rnd( $FFFFFF ) )
			Next
		Next
	UnlockBuffer BackBuffer()

	SetBuffer ImageBuffer( temp )
	LockBuffer ImageBuffer( temp )
		imagebank = LockedPixels()
		For y = 0 To 63
			offset = LockedPitch() * y
			For x = 0 To 63
				PokeInt ( imagebank, offset + x * 4, Rnd( $FF ) )
			Next
		Next
	UnlockBuffer ImageBuffer( temp )

	SetBuffer BackBuffer()

	DrawBlock temp, 320 + Cos( angle ) * 160, 240 + Sin( angle ) * 160

	angle = angle + 1
	If angle > 359 Then angle = angle - 360

	Flip
Wend
FreeImage temp
End

Panno: Can you come on Irc later tonight? (you the guy into eyetoy/webcam stuff right?) I got something I want you to test.

I have a DirectShow based Webcam DLL working that grabs direct to a BB image ( <2ms to capture a 320*240 frame ), and, no crappy extra webcam windows open!

You can also pop open the native Filter/Pin windows to adjust your stream settings e.t.c

I'll be on Irc from 7pm+ tonight if you can make it there. Or mail me, address is in my profile.

Cya!
Tom
'Scouse' @ irc.blitzed.org #blitzbasic

ok tom send u a mail and meet u in #blitzbasic this night

Anybody have the fonction LockedPixel ? i have try to download her from
blitzcoder but the link seem down ?

http://zac-interactive.dk/temp/lockedpixels.zip

Thanks :)