Function Reference


Creates a Bitmap object based on a Graphics object, a width, and a height

#include <GDIPlus.au3>
_GDIPlus_BitmapCreateFromGraphics ( $iWidth, $iHeight, $hGraphics )


$iWidth Specifies the width, in pixels, of the bitmap
$iHeight Specifies the height, in pixels, of the bitmap
$hGraphics Handle to a Graphics object

Return Value

Success: a handle to a Bitmap object Q .
Failure: 0 and sets the @error flag to non-zero, @extended may contain GPSTATUS error code ($GPID_ERR*).


When you are done with the Bitmap object, call _GDIPlus_BitmapDispose() to release the resources.



See Also

Search GdipCreateBitmapFromGraphics in MSDN Library.


#include <GDIPlus.au3>
#include <GUIConstantsEx.au3>

Global $g_hGUI, $g_hBrush, $g_hGfx, $g_hGfxCtxt, $g_hBitmap


Func Example()
    AutoItSetOption("GUIOnEventMode", 1)

    _GDIPlus_Startup() ;initialize GDI+
    Local Const $iWidth = 600, $iHeight = 600, $iBgColor = 0x303030 ;$iBGColor format RRGGBB

    $g_hGUI = GUICreate("GDI+ Example (" & @ScriptName & ")", $iWidth, $iHeight) ;create a test GUI
    GUISetBkColor($iBgColor, $g_hGUI) ;set GUI background color

    ;create buffered graphics frame set for smoother gfx object movements
    $g_hGfx = _GDIPlus_GraphicsCreateFromHWND($g_hGUI) ;create a graphics object from a window handle
    $g_hBitmap = _GDIPlus_BitmapCreateFromGraphics($iWidth, $iHeight, $g_hGfx) ;create a Bitmap object based on a graphics object
    $g_hGfxCtxt = _GDIPlus_ImageGetGraphicsContext($g_hBitmap) ;get the graphics context of the image / bitmap to draw on image / bitmap
    _GDIPlus_GraphicsSetSmoothingMode($g_hGfxCtxt, $GDIP_SMOOTHINGMODE_HIGHQUALITY) ;sets the graphics object rendering quality (antialiasing)

    $g_hBrush = _GDIPlus_BrushCreateSolid(0xFF8080FF) ;create a solid Brush object

    GUISetOnEvent($GUI_EVENT_CLOSE, "_Exit")

    Local Const $iDeg = ACos(-1) / 180 ;ACos(-1) is nearly pi
    Local $iSize = 50, $iX_Center = ($iWidth - $iSize) / 2, $iY_Center = ($iHeight - $iSize) / 2, $iXPos, $iYPos, $iAngle = 0
    Local Const $iDots = 16, $iAngelDist = 360 / $iDots, $iRadius = 200

        _GDIPlus_GraphicsClear($g_hGfxCtxt, 0xFF000000 + $iBgColor) ;clear bitmap with given color (AARRGGBB format)
        For $i = 1 To $iDots
            $iXPos = $iX_Center + Cos($iAngle * $iDeg) * $iRadius
            $iYPos = $iY_Center + Sin($iAngle * $iDeg) * $iRadius
            _GDIPlus_GraphicsFillEllipse($g_hGfxCtxt, $iXPos, $iYPos, $iSize, $iSize, $g_hBrush) ;draw dots in a circle
            $iAngle += $iAngelDist ;increase angle to next dot
        $iAngle += 1 ;increase overall angle
        _GDIPlus_GraphicsDrawImageRect($g_hGfx, $g_hBitmap, 0, 0, $iWidth, $iHeight) ;copy drawn bitmap to GUI
    Until Not Sleep(20) ;Sleep() always returns 1 and Not 1 is 0
EndFunc   ;==>Example

Func _Exit() ;cleanup GDI+ resources
EndFunc   ;==>_Exit