painting to a DC

Codemonger · Post by **Codemonger** » Wed Dec 03, 2003 6:52 pm

Any ideas of how to paint to a DC using the Purebasic 2D Drawing Commands. The reason why I ask, is I got user defined buttons working good, but I don't want to use win32 API - GDI for handling drawing the buttons... I would prefer to use the PB internal commands, much easier. Any ideas or thoughts on this.

einander · Post by **einander** » Sun Dec 07, 2003 10:12 pm

Codemonger:
As nobody answers you, may be this helps. Sorry, with some API

but also ImageGadtet()

Code: Select all

;Paint to a DC mixing API and PB commands, allowing some interesting modes (as #NOTSRCCOPY, #PATPAINT, etc.) with ImageGadget(). 

#IMG0=0
#IMG1=1

hWnd=OpenWindow(0, x,y,600,400, #WS_OVERLAPPEDWINDOW | #PB_Window_WindowCentered, "NotSrcCopy")
hDC = GetDC_(hWnd)
hIMG0 = LoadImage(#IMG0, "********your SMALL BMP here*********")
WI = ImageWidth() : HE = ImageHeight()
hIMG1 = CreateImage(#IMG1, WI, HE)   ; For BITBLT

    Src_DC = CreateCompatibleDC_(hDC)
    SelectObject_(Src_DC, hIMG0)
    Dest_DC = CreateCompatibleDC_(hDC)
    SelectObject_(Dest_DC, hIMG1)
    BitBlt_(Dest_DC, 0, 0, WI, HE, Src_DC, 0, 0, #notsrccopy)  
    DeleteDC_(Src_DC)
    DeleteDC_(Dest_DC)
  
    CreateGadgetList(hWnd)
     StartDrawing(WindowOutput())
     
     ImageGadget(#IMG1, 300, WindowHeight()-200, 0, 0, 0)    ;  x, y Position
     SetGadgetState(#IMG1, UseImage(#IMG1))    ; For BITBLIT
     
     ImageGadget(#IMG0, 300, 10, 0, 0, 0)    ;  x, y Posistion
     SetGadgetState(#IMG0, UseImage(#IMG0))   ; ORIGINAL Image
    
    Repeat
    Until WaitWindowEvent() = #PB_Event_CloseWindow
End

Regards
Einander

Codemonger · Post by **Codemonger** » Mon Dec 08, 2003 5:59 pm

Thanks Einander, your code wasn't exactly what I was looking for but it gave me some great ideas ... API is ok, I was just hoping I could draw to a user defined button with the PB draw commands, they are so much easier. But your code might provide me with a solution. Thanks

Post by **Fred** » Mon Dec 08, 2003 6:47 pm

In fact, you can take a look to the LibrarySDK help file, you should have the structure of PB 2DrawingInfo DC. It's still a bit obscure, I will try to write a little example to do what you want.

einander · Post by **einander** » Mon Dec 08, 2003 7:38 pm

Codemonger:

Just playing with the above code, and there is a procedure to take some advantage of it.

Code: Select all

Enumeration
#SRC1
#SRC2
#SRC3
#SRC4
#Blit1
#Blit2
#Blit3
#Blit4
EndEnumeration


Procedure Blit_Image(SRC,Dest,Style) 
    Orig=UseImage(SRC)
    WI=ImageWidth() : He=ImageHeight()
    Dest = CreateImage(Dest, wi,he)   ; IMAGE PARA BITBLT
     Src_DC = CreateCompatibleDC_(0)   
     SelectObject_(Src_DC, orig)
     Dest_DC = CreateCompatibleDC_(0)
     SelectObject_(Dest_DC, Dest)
    BitBlt_(Dest_DC, 0, 0, WI, HE, Src_DC, 0, 0, Style)  
    DeleteDC_(Src_DC)
    DeleteDC_(Dest_DC)
ProcedureReturn IMG
EndProcedure

Procedure Put(IMG,x,y)
     FreeGadget(IMG)
     ImageGadget(IMG, x,y, 0, 0, UseImage(img))    ; posic x, y
 EndProcedure

OpenWindow(22, x,y,600,400, #WS_OVERLAPPEDWINDOW | #PB_Window_WindowCentered, "Titulo")
CreateImage(#SRC1,WindowWidth()-40,WindowHeight()-40)
StartDrawing(ImageOutput())
Box(0,0,ImageWidth(),ImageHeight(),#blue)
StopDrawing()
CreateGadgetList(WindowID())
;======================== 
;Original image
LoadImage(#SRC2, "******** Your Bitmap Here ")
;======================== 
StartDrawing(WindowOutput()) 
Blit_Image(#SRC2,#BLIT1,#mergepaint)  ; First param= Source Image ID, Second param = Destination Image ID for new Blit_Image
Blit_Image(#SRC2,#BLIT2,#mergecopy)  ; First param= Source Image ID, Second param = Destination Image ID for new Blit_Image
blit_image(#SRC1,#BLIT3,#srcinvert)

put(#BLIT1,200,120)  ; First param = Desired Image_ID 
Put(#BLIT2,200,10)  ; First param = Desired Image_ID
put(#BLIT3,20,20)
  
    Repeat
    Until WaitWindowEvent() = #PB_Event_CloseWindow
End

Regards
Einander

Codemonger · Post by **Codemonger** » Mon Dec 08, 2003 10:07 pm

Thanks Fred, already had a look at the LibrarySDK help file, it's pretty self explanatory. It's just me wrapping my head around the whole thing as WinAPI is not my thing. If I could change the DC of lets say the 2ddraing structure to the user defined button, could I then use PB drawing commands on the user defined button.

This would be great because I would like to skin my app, and have full access to the button events ...

Anyway Einander I'll have a look at your code when I get home tonight, at work right now. Gotta go!