Image reflection (with alpha channel)

[jayme65]

If would like to reproduce an effect like this one

How would you do to mirror an image with an alpha blend?

Thanks very much for your help/advice!!

Edited January 9, 2015 by jayme65

[jayme65]

is this that impossible to achieve?

[AndyG]

Hi,

You could use GDI with Function  _GDIPlus_ImageRotateFlip()

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;original by UEZ ;o)

#include <ScreenCapture.au3>

_GDIPlus_Startup()
Global Const $iDiv = @DesktopHeight
Global Const $hHBitmap = _ScreenCapture_Capture("", 0, 0, @DesktopWidth, $iDiv)
Global Const $hBitmap = _GDIPlus_BitmapCreateFromHBITMAP($hHBitmap)
Global Const $hCtxt = _GDIPlus_ImageGetGraphicsContext($hBitmap)
_WinAPI_DeleteObject($hHBitmap)

Global Const $hBitmap_Temp = _GDIPlus_BitmapCreateFromScan0(@DesktopWidth, $iDiv)
Global Const $hCtxt_Temp = _GDIPlus_ImageGetGraphicsContext($hBitmap_Temp)

Global $iStep = 0


    _GDIPlus_GraphicsDrawImageRectRect($hCtxt_Temp, $hBitmap, $iStep, 0, $iDiv, $iDiv, 0, 0, $iDiv, $iDiv)
    _GDIPlus_ImageRotateFlip($hBitmap_Temp,6)
    _GDIPlus_GraphicsDrawImageRectRect($hCtxt, $hBitmap_Temp, 0, 0, $iDiv, $iDiv, $iStep, 0, $iDiv, $iDiv)


Global Const $hGUI = GUICreate("Flipped Images", @DesktopWidth, $iDiv)
GUISetState()
Global Const $hGraphic = _GDIPlus_GraphicsCreateFromHWND($hGUI)
_GDIPlus_GraphicsDrawImageRect($hGraphic, $hBitmap, 0, 0, @DesktopWidth, $iDiv)

Do
Until GUIGetMsg() = -3

_GDIPlus_BitmapDispose($hBitmap)
_GDIPlus_BitmapDispose($hBitmap_Temp)
_GDIPlus_GraphicsDispose($hCtxt)
_GDIPlus_GraphicsDispose($hCtxt_Temp)
_GDIPlus_GraphicsDispose($hGraphic)
_GDIPlus_Shutdown()
GUIDelete()
Exit

Edited January 10, 2015 by AndyG

[jayme65]

Andy,

Thanks very much for your help and for the time taken to write this script!!

Any idea on how to apply an alpha blen to a bitmap to achieve the reflection effetct?

[UEZ]

Have a look here:

Br,

UEZ

[Yashied]

With alpha channel.

 

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#Include <GDIPlus.au3>

If StringRegExpReplace(@AutoItVersion, '(?<!\d)(\d)(?!\d)', '0\1') < '03.03.12.00' Then
    MsgBox(16, 'Error', 'Require AutoIt 3.3.12.0 or later.')
EndIf

$sFile = @ScriptDir & '\iPhone.png'

_GDIPlus_Startup()
$hBitmap = _GDIPlus_BitmapCreateFromFile($sFile)
$hReflection = _GDIPlus_BitmapCreateReflectionBitmap($hBitmap, _GDIPlus_ImageGetHeight($hBitmap) * 0.25, 128)
_GDIPlus_ImageSaveToFile($hReflection, StringRegExpReplace($sFile, '(\.[^\.]+)', '_Reflection\1'))
_GDIPlus_BitmapDispose($hReflection)
_GDIPlus_BitmapDispose($hBitmap)
_GDIPlus_Shutdown()

Func _GDIPlus_BitmapCreateReflectionBitmap($hBitmap, $iReflectionHeight, $iAlpha)

    Local $hGraphics, $hBrush, $hReflection[2], $hAlpha, $hResult, $Size

    $Size = DllCall($__g_hGDIPDll, 'uint', 'GdipGetImageDimension', 'handle', $hBitmap, 'float*', 0, 'float*', 0)
    If (@Error) Or ($Size[0]) Then
        Return 0
    EndIf
    If $iReflectionHeight > $Size[3] Then
        $iReflectionHeight = $Size[3]
    EndIf
    If $iReflectionHeight < 0 Then
        $iReflectionHeight = 0
    EndIf
    $hReflection[0] = _GDIPlus_BitmapCloneArea($hBitmap, 0, $Size[3] - $iReflectionHeight, $Size[2], $iReflectionHeight, $GDIP_PXF32ARGB)
    _GDIPlus_ImageRotateFlip($hReflection[0], 6)
    $hAlpha = _GDIPlus_BitmapCreateFromScan0($Size[2], $iReflectionHeight, $GDIP_PXF32ARGB)
    $hGraphics = _GDIPlus_ImageGetGraphicsContext($hAlpha)
    _GDIPlus_GraphicsClear($hGraphics, 0)
    $hBrush = _GDIPlus_LineBrushCreate(0, 0, 0, $iReflectionHeight, BitShift($iAlpha, -24), 0)
    _GDIPlus_GraphicsFillRect($hGraphics, 0, 0, $Size[2], $iReflectionHeight, $hBrush)
    _GDIPlus_GraphicsDispose($hGraphics)
    $hReflection[1] = _GDIPlus_BitmapCreateBitmapWithAlpha($hReflection[0], $hAlpha)
    $hResult = _GDIPlus_BitmapCreateFromScan0($Size[2], $Size[3] + $iReflectionHeight)
    $hGraphics = _GDIPlus_ImageGetGraphicsContext($hResult)
    _GDIPlus_GraphicsClear($hGraphics, 0)
    _GDIPlus_GraphicsDrawImageRect($hGraphics, $hBitmap, 0, 0, $Size[2], $Size[3])
    _GDIPlus_GraphicsDrawImageRect($hGraphics, $hReflection[1], 0, $Size[3], $Size[2], $iReflectionHeight)
    _GDIPlus_GraphicsDispose($hGraphics)
    _GDIPlus_BitmapDispose($hAlpha)
    For $i = 0 To 1
        _GDIPlus_BitmapDispose($hReflection[$i])
    Next
    _GDIPlus_BrushDispose($hBrush)
    Return $hResult
EndFunc   ;==>_GDIPlus_BitmapCreateReflectionBitmap

Func _GDIPlus_BitmapCreateBitmapWithAlpha($hBitmap, $hAlpha, $iChannel = 0)

    Local $hGraphics, $hBmp[2], $bProc, $tProc, $pProc, $Size1, $Size2, $Lenght, $Result
    Local $tData[2] = [$GDIP_ILMWRITE, $GDIP_ILMREAD]

    $Size1 = DllCall($__g_hGDIPDll, 'uint', 'GdipGetImageDimension', 'handle', $hBitmap, 'float*', 0, 'float*', 0)
    If (@Error) Or ($Size1[0]) Then
        Return 0
    EndIf
    $Size2 = DllCall($__g_hGDIPDll, 'uint', 'GdipGetImageDimension', 'handle', $hAlpha, 'float*', 0, 'float*', 0)
    If (@Error) Or ($Size2[0]) Then
        Return 0
    EndIf
    $hBmp[0] = _GDIPlus_BitmapCloneArea($hBitmap, 0, 0, $Size1[2], $Size1[3], $GDIP_PXF32ARGB)
    If ($Size1[2] = $Size2[2]) And ($Size1[3] = $Size2[3]) Then
        $hBmp[1] = $hAlpha
    Else
        $hBmp[1] = _GDIPlus_BitmapCreateFromScan0($Size1[2], $Size1[3], $GDIP_PXF32ARGB)
        $hGraphics = _GDIPlus_ImageGetGraphicsContext($hBmp[1])
        _GDIPlus_GraphicsClear($hGraphics, 0)
        _GDIPlus_GraphicsDrawImageRect($hGraphics, $hAlpha, 0, 0, $Size1[2], $Size1[3])
        _GDIPlus_GraphicsDispose($hGraphics)
    EndIf
    If ($iChannel < 0) Or ($iChannel > 3) Then
        $iChannel = 0
    EndIf
    For $i = 0 To 1
        $tData[$i] = _GDIPlus_BitmapLockBits($hBmp[$i], 0, 0, $Size1[2], $Size1[3], $tData[$i], $GDIP_PXF32ARGB)
    Next
    If @AutoItX64 Then
        $bProc = Binary('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
    Else
        $bProc = Binary('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
    EndIf
    $Length = BinaryLen($bProc)
    $pProc = DllCall('kernel32.dll', 'ptr', 'VirtualAlloc', 'ptr', 0, 'ulong_ptr', $Length, 'dword', 0x1000, 'dword', 0x0040)
    $tProc = DllStructCreate('byte[' & $Length & ']', $pProc[0])
    DllStructSetData($tProc, 1, $bProc)
    $Result = DllCallAddress('uint', $pProc[0], 'ptr', $tData[0].Scan0, 'ptr', $tData[1].Scan0, 'uint', $Size1[2] * $Size1[3], 'uint', $iChannel)
    If Not $Result[0] Then
        ; Nothing
    EndIf
    DllCall('kernel32.dll', 'int', 'VirtualFree', 'ptr', $pProc[0], 'ulong_ptr', 0, 'dword', 0x4000)
    For $i = 0 To 1
        _GDIPlus_BitmapUnlockBits($hBmp[$i], $tData[$i])
    Next
    If $hBmp[1] <> $hAlpha Then
        _GDIPlus_BitmapDispose($hBmp[1])
    EndIf
    Return $hBmp[0]
EndFunc   ;==>_GDIPlus_BitmapCreateBitmapWithAlpha

Edited January 13, 2015 by Yashied

[UEZ]

Here one more which I found in my collections:
 

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;idea from here -> http://danbystrom.se/2009/01/12/thumbnails-with-glass-table-reflection-in-gdi/
;coded by UEZ 2013-10-04

#include <GDIPlus.au3>

Opt("GUIOnEventMode", 1)

_GDIPlus_Startup()
Global Const $sFile = FileOpenDialog("Select an image", "", "Images (*.bmp,*.gif;*.jpg;*.png)")
If @error Then Exit


Global Const $hGUI = GUICreate("GDI+ Thumbnails with glass table reflection", 600, 400)
GUISetBkColor(0xF0F0F0)
GUISetState()

Global Const $hGraphic = _GDIPlus_GraphicsCreateFromHWND($hGUI)
Global Const $hImage = _GDIPlus_ImageLoadFromFile($sFile)

$t = TimerInit()
Global Const $hBmp = _GDIPlus_BitmapCreateThumbnailWithReflection($hImage)
ConsoleWrite(TimerDiff($t) & " ms" & @LF)
$t = TimerInit()
Global Const $hBmp2 = _GDIPlus_BitmapCreateThumbnailWithReflection2($hImage)
ConsoleWrite(TimerDiff($t) & " ms" & @LF)
ConsoleWrite(_GDIPlus_ImageGetWidth($hBmp) & " x " & _GDIPlus_ImageGetHeight($hBmp) & @LF)
_GDIPlus_GraphicsDrawImage($hGraphic, $hBmp, (400 - _GDIPlus_ImageGetWidth($hBmp)) / 2, (400 - _GDIPlus_ImageGetHeight($hBmp)) / 2)
_GDIPlus_GraphicsDrawImage($hGraphic, $hBmp2, (600 + _GDIPlus_ImageGetWidth($hBmp2)) / 2, (400 - _GDIPlus_ImageGetHeight($hBmp2)) / 2)
GUISetOnEvent(-3, "_Exit")

While Sleep(2 ^ 16)
WEnd

Func _Exit()
    _GDIPlus_BitmapDispose($hBmp)
    _GDIPlus_BitmapDispose($hBmp2)
    _GDIPlus_ImageDispose($hImage)
    _GDIPlus_GraphicsDispose($hGraphic)
    _GDIPlus_Shutdown()
    Exit
EndFunc   ;==>_Exit

Func _GDIPlus_BitmapCreateThumbnailWithReflection($hImage, $iTNWidth = 150, $iTNHeight = 150, $iSkew = 40, $iBorderWhite = 2, $iBorderBlack = 1, $fBlur = 0.4, $iBrightness = 175, $iContrast = -70, $iSmooth = 7)
    Local $iWidth = _GDIPlus_ImageGetWidth($hImage), $iHeight = _GDIPlus_ImageGetHeight($hImage), $f
    If $iWidth > $iHeight Then
        $iTNHeight *= $iHeight / $iWidth
    ElseIf $iWidth < $iHeight Then
        $iTNWidth *= $iWidth / $iHeight
    EndIf
    Local $iW = Floor($iTNWidth + ($iBorderWhite + $iBorderBlack) * 2), $iH = Floor($iTNHeight + ($iBorderWhite + $iBorderBlack) * 2)
    Local $hBitmap = _GDIPlus_BitmapCreateFromScan0($iW, $iH * 2 - $iBorderBlack)
    Local $hCtxt = _GDIPlus_ImageGetGraphicsContext($hBitmap)
    _GDIPlus_GraphicsSetInterpolationMode($hCtxt, $iSmooth)
;~  _GDIPlus_GraphicsClear($hCtxt, 0xFFFFFFFF)
    Local $hBitmap_tmp = _GDIPlus_BitmapCreateFromScan0($iW, $iH)
    Local $hCtxt_tmp = _GDIPlus_ImageGetGraphicsContext($hBitmap_tmp)
    _GDIPlus_GraphicsSetInterpolationMode($hCtxt_tmp, $iSmooth)
    Local $hPen = _GDIPlus_PenCreate(0xFFFFFFFF, $iBorderWhite)
    _GDIPlus_GraphicsDrawRect($hCtxt_tmp, $iBorderBlack, $iBorderBlack, $iW - $iBorderWhite - $iBorderBlack, $iH - $iBorderWhite - $iBorderBlack, $hPen)
    _GDIPlus_PenSetColor($hPen, 0xFF000000)
    _GDIPlus_PenSetWidth($hPen, $iBorderBlack)
    _GDIPlus_GraphicsDrawRect($hCtxt_tmp, 0, 0, $iW - $iBorderBlack / 2, $iH, $hPen)
    _GDIPlus_GraphicsDrawImageRect($hCtxt_tmp, $hImage, $iBorderWhite + $iBorderBlack, $iBorderWhite + $iBorderBlack, $iTNWidth, $iTNHeight)
    _GDIPlus_GraphicsDrawImage($hCtxt, $hBitmap_tmp, 0, 0)
    _GDIPlus_ImageRotateFlip($hBitmap_tmp, 6)

    Local Const $iQual = 6
    Local $hBmpSmall = _GDIPlus_BitmapCreateFromScan0($iW, $iH)
    Local $hGfxSmall = _GDIPlus_ImageGetGraphicsContext($hBmpSmall)
    _GDIPlus_GraphicsSetPixelOffsetMode($hGfxSmall, 2)
    Local $hBmpBig = _GDIPlus_BitmapCreateFromScan0($iW, $iH)
    Local $hGfxBig = _GDIPlus_ImageGetGraphicsContext($hBmpBig)
    _GDIPlus_GraphicsSetPixelOffsetMode($hGfxBig, 2)

    _GDIPlus_GraphicsScaleTransform($hGfxSmall, $fBlur, $fBlur)
    _GDIPlus_GraphicsSetInterpolationMode($hGfxSmall, $iQual)

    _GDIPlus_GraphicsScaleTransform($hGfxBig, 1 / $fBlur, 1 / $fBlur)
    _GDIPlus_GraphicsSetInterpolationMode($hGfxBig, $iQual)

    _GDIPlus_GraphicsDrawImageRect($hGfxSmall, $hBitmap_tmp, 0, 0, $iW, $iH)
    _GDIPlus_GraphicsDrawImageRect($hGfxBig, $hBmpSmall, 0, 0, $iW, $iH)

    _GDIPlus_GraphicsDrawImageRect($hCtxt_tmp, $hBmpBig, 0, 0, $iW, $iH)

    _GDIPlus_GraphicsDispose($hGfxSmall)
    _GDIPlus_GraphicsDispose($hGfxBig)
    _GDIPlus_BitmapDispose($hBmpSmall)
    _GDIPlus_BitmapDispose($hBmpBig)

    Local $fAlpha, $iColor, $iPixelColor
    Local $tBitmapData = _GDIPlus_BitmapLockBits($hBitmap_tmp, 0, 0, $iW, $iH, BitOR($GDIP_ILMWRITE, $GDIP_ILMREAD), $GDIP_PXF32ARGB)
    Local $iScan0 = DllStructGetData($tBitmapData, "Scan0") ;get scan0 (pixel data) from locked bitmap
    Local $tPixel = DllStructCreate("int[" & $iW * $iH & "];", $iScan0)
    Local $iPixel, $iRowOffset, $iR, $iG, $iB
    For $iY = 0 To $iH - 1
        $iRowOffset = $iY * $iW + 1
        $fAlpha = (0xF8 * ($iH - $iY - 0x18) / $iH)
        If $fAlpha < 0 Then $fAlpha = 0
        For $iX = 0 To $iW - 1
            $iPixelColor = BitAND(DllStructGetData($tPixel, 1, $iRowOffset + $iX), 0x00FFFFFF)
            $iR = BitAND(BitShift($iPixelColor, 16), 0x0000FF)
            $iG = BitAND(BitShift($iPixelColor, 8), 0x0000FF)
            $iB = BitAND($iPixelColor, 0x0000FF)
            DllStructSetData($tPixel, 1, "0x" & _
                    Hex(Int($fAlpha), 2) & _
                    Hex(Int(($iR * 3 + $iG * 2 + $iB * 2) / 8), 2) & _
                    Hex(Int(($iR * 2 + $iG * 3 + $iB * 2) / 8), 2) & _
                    Hex(Int(($iR * 2 + $iG * 2 + $iB * 3) / 8), 2), $iRowOffset + $iX)
        Next
    Next
    _GDIPlus_BitmapUnlockBits($hBitmap_tmp, $tBitmapData)
    _GDIPlus_PenDispose($hPen)
    _GDIPlus_GraphicsDrawImageRect($hCtxt, $hBitmap_tmp, 0, $iH, $iW, $iH)
    _GDIPlus_GraphicsDispose($hCtxt)
    _GDIPlus_GraphicsDispose($hCtxt_tmp)
    _GDIPlus_BitmapDispose($hBitmap_tmp)
    If $iSkew Then
        $iW = _GDIPlus_ImageGetWidth($hBitmap)
        $iH = _GDIPlus_ImageGetHeight($hBitmap)
        Local $hBitmapSkewed = _GDIPlus_BitmapCreateFromScan0($iW, $iH), $x
        $hCtxt = _GDIPlus_ImageGetGraphicsContext($hBitmapSkewed)
;~      _GDIPlus_DrawImagePoints($hCtxt, $hBitmap, 0, 0, $iW, $iSkew, 0, $iH)
        For $x = 0 To $iW - 1
            _GDIPlus_GraphicsDrawImageRectRect($hCtxt, $hBitmap, _
                    $x, 0, 1, $iH, _
                    $x, 0, 1, $iH - $iSkew * ($iW - $x) / $iW)
        Next
        _GDIPlus_GraphicsDispose($hCtxt)
        _GDIPlus_BitmapDispose($hBitmap)
        Return $hBitmapSkewed
    EndIf
    Return $hBitmap
EndFunc   ;==>_GDIPlus_BitmapCreateThumbnailWithReflection

Func _GDIPlus_BitmapCreateThumbnailWithReflection2($hImage, $iTNWidth = 150, $iTNHeight = 150, $iSkew = 40, $iBorderWhite = 2, $iBorderBlack = 1, $fBlur = 3.25, $iBrightness = 170, $iContrast = -70, $iSmooth = 7)
    Local $iWidth = _GDIPlus_ImageGetWidth($hImage), $iHeight = _GDIPlus_ImageGetHeight($hImage), $f
    If $iWidth > $iHeight Then
        $iTNHeight *= $iHeight / $iWidth
    ElseIf $iWidth < $iHeight Then
        $iTNWidth *= $iWidth / $iHeight
    EndIf
    Local $iW = Floor($iTNWidth + ($iBorderWhite + $iBorderBlack) * 2), $iH = Floor($iTNHeight + ($iBorderWhite + $iBorderBlack) * 2)
    Local $hBitmap = _GDIPlus_BitmapCreateFromScan0($iW, $iH * 2 - $iBorderBlack)
    Local $hCtxt = _GDIPlus_ImageGetGraphicsContext($hBitmap)
    _GDIPlus_GraphicsSetInterpolationMode($hCtxt, $iSmooth)
    Local $hBitmap_tmp = _GDIPlus_BitmapCreateFromScan0($iW, $iH)
    Local $hCtxt_tmp = _GDIPlus_ImageGetGraphicsContext($hBitmap_tmp)
    _GDIPlus_GraphicsSetInterpolationMode($hCtxt_tmp, $iSmooth)
    Local $hPen = _GDIPlus_PenCreate(0xFFFFFFFF, $iBorderWhite)
    _GDIPlus_GraphicsDrawRect($hCtxt_tmp, $iBorderBlack, $iBorderBlack, $iW - $iBorderWhite - $iBorderBlack, $iH - $iBorderWhite - $iBorderBlack, $hPen)
    _GDIPlus_PenSetColor($hPen, 0xFF000000)
    _GDIPlus_PenSetWidth($hPen, $iBorderBlack)
    _GDIPlus_GraphicsDrawRect($hCtxt_tmp, 0, 0, $iW - $iBorderBlack / 2, $iH, $hPen)
    _GDIPlus_GraphicsDrawImageRect($hCtxt_tmp, $hImage, $iBorderWhite + $iBorderBlack, $iBorderWhite + $iBorderBlack, $iTNWidth, $iTNHeight)
    _GDIPlus_GraphicsDrawImage($hCtxt, $hBitmap_tmp, 0, 0)
    _GDIPlus_ImageRotateFlip($hBitmap_tmp, 6)

    Local $hEffectBC = _GDIPlus_EffectCreateBrightnessContrast($iBrightness, $iContrast)
    _GDIPlus_BitmapApplyEffect($hBitmap_tmp, $hEffectBC)
    Local $hEffectBlur = _GDIPlus_EffectCreateBlur($fBlur, True)
    _GDIPlus_BitmapApplyEffect($hBitmap_tmp, $hEffectBlur)

    _GDIPlus_EffectDispose($hEffectBC)
    _GDIPlus_EffectDispose($hEffectBlur)

    Local $hAttribute_Alpha = _GDIPlus_ImageAttributesCreate()
    Local $hBitmap_Alpha = _GDIPlus_BitmapCreateFromScan0($iW, $iH)
    Local $hCtxt_Alpha = _GDIPlus_ImageGetGraphicsContext($hBitmap_Alpha), $iY, $tColorMatrix, $d = (-1 / 0x80)

    For $iY = 0 To $iH - 1
        $tColorMatrix = _GDIPlus_ColorMatrixCreateTranslate(0, 0, 0, $iY * $d)
        _GDIPlus_ImageAttributesSetColorMatrix($hAttribute_Alpha, 0, True, DllStructGetPtr($tColorMatrix))
        _GDIPlus_GraphicsDrawImageRectRect($hCtxt_Alpha, $hBitmap_tmp, 0, $iY, $iW, 1, 0, $iY, $iW, 1, $hAttribute_Alpha)
    Next

    _GDIPlus_GraphicsDispose($hCtxt_Alpha)
    _GDIPlus_ImageAttributesDispose($hAttribute_Alpha)
    _GDIPlus_PenDispose($hPen)
    _GDIPlus_GraphicsDrawImageRect($hCtxt, $hBitmap_Alpha, 0, $iH, $iW, $iH)
    _GDIPlus_GraphicsDispose($hCtxt)
    _GDIPlus_GraphicsDispose($hCtxt_tmp)
    _GDIPlus_BitmapDispose($hCtxt_Alpha)
    _GDIPlus_BitmapDispose($hBitmap_tmp)
    If $iSkew Then
        $iW = _GDIPlus_ImageGetWidth($hBitmap)
        $iH = _GDIPlus_ImageGetHeight($hBitmap)
        Local $hBitmapSkewed = _GDIPlus_BitmapCreateFromScan0($iW, $iH), $iX
        $hCtxt = _GDIPlus_ImageGetGraphicsContext($hBitmapSkewed)
;~      _GDIPlus_DrawImagePoints($hCtxt, $hBitmap, 0, 0, $iW, $iSkew, 0, $iH)
        For $iX = 0 To $iW - 1
            _GDIPlus_GraphicsDrawImageRectRect($hCtxt, $hBitmap, _
                                                        $iX, 0, 1, $iH, _
                                                        $iX, 0, 1, $iH - $iSkew * ($iW - $iX) / $iW)
        Next
        _GDIPlus_GraphicsDispose($hCtxt)
        _GDIPlus_BitmapDispose($hBitmap)
        Return $hBitmapSkewed
    EndIf
    Return $hBitmap
EndFunc   ;==>_GDIPlus_BitmapCreateThumbnailWithReflection2

Br,

UEZ

[Yashied]

@UEZ

If you do it pixel by pixel (line by line) using AutoIt, it will take a lot of time. ASM will reduce the time by several orders.

[UEZ]

You are right. For a few images it should be fast enough but for plenty of images it's too slow.

Learning ASM / C++ is the next level of coding for me. But when...

Br,

UEZ

[jayme65]

Thanks very much for the url (UEZ) and for the complete code (Yashied) to achieve this reflection effect!

I'm really gratefull to you!!