Function Reference


_GDIPlus_PathReverse

Reverses the order of the points that define a path's lines and curves

#include <GDIPlus.au3>
_GDIPlus_PathReverse ( $hPath )

Parameters

$hPath Pointer to a GraphicsPath object

Return Value

Success: True.
Failure: False and sets the @error flag to non-zero, @extended may contain GPSTATUS error code ($GPID_ERR*).

See Also

Search GdipReversePath in MSDN Library.

Example

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

Example()

Func Example()
    Local $iW, $iH, $hGUI, $hGraphic, $hBrush, $hPen, $hPath, $hPath_Clone, $hMatrix

    ; Create GUI
    $iW = 600
    $iH = 600
    $hGUI = GUICreate("GDI+", $iW, $iH)
    GUISetState(@SW_SHOW)

    _GDIPlus_Startup()
    $hGraphic = _GDIPlus_GraphicsCreateFromHWND($hGUI) ;Create a graphics object from a window handle
    _GDIPlus_GraphicsSetSmoothingMode($hGraphic, $GDIP_SMOOTHINGMODE_HIGHQUALITY) ;Sets the graphics object rendering quality (antialiasing)
    _GDIPlus_GraphicsClear($hGraphic, 0xFFFFFFFF)

    $hBrush = _GDIPlus_BrushCreateSolid(0x7F8800AA)
    $hPen = _GDIPlus_PenCreate(0xFF8800AA, 2)

    $hPath = _GDIPlus_PathCreate() ;Create new path object

    ;spiral as a sequence of lines
    Local $iXOld = 0, $iYOld = 0, $iX, $iY, $iAngle = 0, $iRadius = 0
    For $i = 0 To 200
        $iX = Cos($iAngle) * $iRadius
        $iY = Sin($iAngle) * $iRadius
        $iAngle += 0.1
        $iRadius = $iAngle ^ 2 / 2
        _GDIPlus_PathAddLine($hPath, $iXOld, $iYOld, $iX, $iY)
        $iXOld = $iX
        $iYOld = $iY
    Next

    $hPath_Clone = _GDIPlus_PathClone($hPath)
    _GDIPlus_PathReverse($hPath_Clone) ;reverse path => end point of path = start point of cloned path

    $hMatrix = _GDIPlus_MatrixCreate()
    _GDIPlus_MatrixScale($hMatrix, 1.5, 1.5)
    _GDIPlus_PathTransform($hPath_Clone, $hMatrix) ;zoom cloned path

    _GDIPlus_PathAddPath($hPath, $hPath_Clone) ;add scaled/reversed path to original path

    _GDIPlus_MatrixSetElements($hMatrix, 1, 0, 0, 1, 0, 0) ;reset matrix
    _GDIPlus_MatrixTranslate($hMatrix, $iW / 2, $iH / 2, True)
    _GDIPlus_PathTransform($hPath, $hMatrix) ;move path to center of window

    _GDIPlus_GraphicsFillPath($hGraphic, $hPath, $hBrush) ;Fill path to graphics handle (GUI)
    _GDIPlus_GraphicsDrawPath($hGraphic, $hPath, $hPen) ;Draw path to graphics handle (GUI)

    ; Loop until the user exits.
    Do
    Until GUIGetMsg() = $GUI_EVENT_CLOSE

    ; Clean up resources
    _GDIPlus_MatrixDispose($hMatrix)
    _GDIPlus_PathDispose($hPath)
    _GDIPlus_PathDispose($hPath_Clone)
    _GDIPlus_BrushDispose($hBrush)
    _GDIPlus_PenDispose($hPen)
    _GDIPlus_GraphicsDispose($hGraphic)
    _GDIPlus_Shutdown()
EndFunc   ;==>Example