GDI+ DoubleBuffer

[Uriziel01]

Can someone give me a Autoit implementation of GDI+ double buffer i have some code and I want to avoid flickering. I now that it can be done by creating second DC, compatible bitmap and _WinAPI_BitBlt or (second way) by _GDIPlus_BitmapLockBits My script is only a example and I can make the entire script in entire diffrent way, I just need a key to solution of this problem:

Code:

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#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <GDIPlus.au3>
#include <WinAPI.au3>
#include <Misc.au3>
#include <Array.au3>
_GDIPlus_Startup()
Opt("MouseCoordMode", 2)
$dll = DllOpen("user32.dll")
   $Gui=GUICreate("GameName",800,600,-1,-1) 
    GUISetBkColor(0x303030, $Gui)
    $pic3=GUICtrlCreatePic("",0,0,800,600)
        $pic2=GUICtrlCreatePic("",10,10,500,500)
    $pic1=GUICtrlCreatePic("",3,110,100,100)

    GUISetState(@SW_SHOW) 
PicSetGraphics($pic3, 800, 600, @ScriptDir&"\gfx\grass.jpg",1,0)
    PicSetGraphics($pic2, 100, 100, @ScriptDir&"\gfx\explosion.png",4,0)
        PicSetGraphics($pic1, 100, 100, @ScriptDir&"\gfx\sprite.png",1,20)
        Local $ii=3
    While 1
        $ii+=1
        if $ii=300 then $ii=0
        ControlMove("GameName","",$pic1,110,$ii)

    _WinAPI_RedrawWindow($Gui,"", "", $RDW_INVALIDATE)
    sleep(15)
        $msg = GUIGetMsg()
        If $msg = $GUI_EVENT_CLOSE Then ExitLoop
    WEnd
    GUIDelete()

Func PicSetGraphics($cID, $img_W, $img_H, $image_file,$scale,$rotate)
    Local $STM_SETIMAGE = 0x0172
    Local $IMAGE_BITMAP = 0
    Local $hWnd, $hBitmap, $hImage, $hGraphic, $hBrush, $hBrush1, $hbmp, $aBmp
    $hWnd = GUICtrlGetHandle($cID)
    ;
    $hGraphicGUI = _GDIPlus_GraphicsCreateFromHWND($hWnd)
    $hImage = _GDIPlus_BitmapCreateFromGraphics(($img_W*$scale)*3, ($img_H*$scale)*3, $hGraphicGUI)
    $hGraphic = _GDIPlus_ImageGetGraphicsContext($hImage)
    if $rotate<>0 then
        $hMatrix = _GDIPlus_MatrixCreate()
    _GDIPlus_MatrixRotate($hMatrix, $rotate, "False")
    _GDIPlus_GraphicsSetTransform($hGraphic, $hMatrix)
    endif
    _GDIPlus_GraphicsSetSmoothingMode($hGraphic, 2)
    ;----->  All Graphics Here
if $rotate<>0 then
    $hBitmap = _GDIPlus_ImageLoadFromFile($image_file)
    _GDIPlus_GraphicsDrawImageRect($hGraphic, $hBitmap,  $img_w,  $img_H, $img_W*$scale, $img_H*$scale)
Else
        $hBitmap = _GDIPlus_ImageLoadFromFile($image_file)
    _GDIPlus_GraphicsDrawImageRect($hGraphic, $hBitmap,  0,  0, $img_W*$scale, $img_H*$scale)
    endif
    ; -----> End of all Graphics
    $hbmp = _GDIPlus_BitmapCreateHBITMAPFromBitmap($hImage)
    $iX = _GDIPlus_ImageGetWidth ($hImage)
    $iY = _GDIPlus_ImageGetHeight ($hImage)
    $aBmp = DllCall("user32.dll", "hwnd", "SendMessage", "hwnd", $hWnd, "int", $STM_SETIMAGE, "int", $IMAGE_BITMAP, "int", $hbmp)
    _WinAPI_RedrawWindow($Gui, "", "", BitOR($RDW_INVALIDATE, $RDW_UPDATENOW, $RDW_FRAME))
    If $aBmp[0] <> 0 Then _WinAPI_DeleteObject($aBmp[0])
    _WinAPI_DeleteObject($hbmp)
    _WinAPI_DeleteObject($hImage)
    _GDIPlus_BrushDispose($hBrush1)
    _GDIPlus_GraphicsDispose($hGraphic)
    _GDIPlus_GraphicsDispose($hGraphicGUI)
    _WinAPI_DeleteObject($hBitmap)
EndFunc   ;==>PicSetGraphics
Func _Quit()
    Exit
EndFunc   ;==>_Quit
;
Func ntmem($i_PID = -1)
    If $i_PID <> -1 Then
        Local $ai_Handle = DllCall("kernel32.dll", 'int', 'OpenProcess', 'int', 0x1f0fff, 'int', False, 'int', $i_PID)
        Local $ai_Return = DllCall("psapi.dll", 'int', 'EmptyWorkingSet', 'long', $ai_Handle[0])
        DllCall('kernel32.dll', 'int', 'CloseHandle', 'int', $ai_Handle[0])
    Else
        Local $ai_Return = DllCall("psapi.dll", 'int', 'EmptyWorkingSet', 'long', -1)
    EndIf
EndFunc   ;==>ntmem

[dantay9]

Here is a double buffer template (i think made by monoceres) that I use all time.

#include <GUIConstants.au3>
#include <GDIplus.au3>

Global Const $width = 600
Global Const $height = 400
Global $title = "GDI+"

; Build your GUI here
Opt("GUIOnEventMode", 1)
$hwnd = GUICreate($title, $width, $height)
GUISetOnEvent($GUI_EVENT_CLOSE, "close")
GUISetState()

; Load your GDI+ resources here:
_GDIPlus_Startup()
$graphics = _GDIPlus_GraphicsCreateFromHWND($hwnd)
$bitmap = _GDIPlus_BitmapCreateFromGraphics($width, $height, $graphics)
$backbuffer = _GDIPlus_ImageGetGraphicsContext($bitmap)


While 1
    _GDIPlus_GraphicsClear($backbuffer)

    ; Draw your GDI+ scene onto $backbuffer here

    _GDIPlus_GraphicsDrawImageRect($graphics, $bitmap, 0, 0, $width, $height)
    Sleep(10)
WEnd

Func close()
    _GDIPlus_GraphicsDispose($backbuffer)
    _GDIPlus_BitmapDispose($bitmap)
    _GDIPlus_GraphicsDispose($graphics)
    _GDIPlus_Shutdown()
    Exit
EndFunc ;==>close

[Uriziel01]

With all the respect, where is the double buffering in you example? I can only see a normal GraphicsDrawImageRect function with only one DC? Or im wrong, meaby you can make a example with some example moving picture, I would really appreciate that. Thank you

Edited November 24, 2009 by Uriziel01

[UEZ]

Look here: http://www.autoitscript.com/forum/index.php?showtopic=87200

A lot of GDI+ examples or seach in the forum!

UEZ

Edited November 24, 2009 by UEZ

[dantay9]

It isn't a working example. It was just a template to build on. I thought it would be easier if you had a clean example of how double buffering should work.

[monoceres]

With all the respect, where is the double buffering in you example? I can only see a normal GraphicsDrawImageRect function with only one DC? Or im wrong, meaby you can make a example with some example moving picture, I would really appreciate that. Thank you

There are two handles. One to the screen and one to an offscreen buffer that will be drawn to the screen when all drawing is complete.

[Uriziel01]

Ohhh, sorry everyone I did'nt looked it the script correctly, after seeing UEZ link (Enterprise Warp by youknowwho4eva) I have understood double-buffering trick in it Now I have second question, how can I make a one image from (for example) 32 images (tile based game map) ? Because it will need less % of CPU and BM's of RAM when I will render only one big image instead of 32 (or more) small ones, I think? And it will be faster to save this to a file and then read and display? Or meaby leave it in memory ? p.s-Im HORRIBLE sorry for my bad english, if you dont know what im talking about, please say, I will try to do it again more correctly. Thank you for the help!

Edited November 24, 2009 by Uriziel01

[UEZ]

Have a look also to monoceres' excellent example -> http://www.autoitscript.com/forum/index.php?showtopic=81580

This might answer your question partly.

UEZ