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Cybergon

Change image interpolation

8 posts in this topic

Hey guys, sorry if this is a repeated or stupid question but I just couldn't find any on-spot topics to help me out.

I'm using GUICtrlCreatePic to place this tiny stretched out bmp inside a form, but I haven't the slightest idea on how to change the interpolation so it doesn't look blurry like the one on the left.

Posted Image

So please how can I do this?

To be honest this is more or less for cosmetic purposes, but it can't be that hard to change, can it?

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#2 ·  Posted (edited)

You can use GDI+ to scale the image using the _GDIPlus_GraphicsSetInterpolationMode() function (in ) to set the interpolation to nearest-neighbor interpolation.

Afterwards you can send the scaled image to the picture control.

Br,

UEZ

Edited by UEZ
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Please don't send me any personal message and ask for support! I will not reply!

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#3 ·  Posted (edited)

Thanks for the help UEZ. So far this is what I got:

$display = GUICreate("imaeg",$newimagewidth,$newimageheight,int((@DesktopWidth-$newimagewidth)/2),Int((@DesktopHeight-$newimageheight)/2))
GUISetState()
_GDIPlus_Startup()
$grafix = _GDIPlus_GraphicsCreateFromHWND($display)
$hImage = _GDIPlus_ImageLoadFromFile($filename)
_GDIPlus_GraphicsDrawImageRect($grafix,$hImage,0,0,$newimagewidth,$newimageheight)
_GDIPlus_GraphicsSetInterpolationMode($grafix,5)

But how do I send the image to the GUICtrlCreatePic?

Edit: Actually that doesn't seem to change the interpolation at all. Help?

Edited by Cybergon

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#4 ·  Posted (edited)

Try this:

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

$filename = FileOpenDialog("Select an image", "", "Images (*.jpg;*.png*;*.bmp;*.gif)", 3)
If @error Then Exit
_GDIPlus_Startup()
$hImage = _GDIPlus_ImageLoadFromFile($filename)
$iW = _GDIPlus_ImageGetWidth($hImage)
$iH  = _GDIPlus_ImageGetHeight($hImage)
$scale = 0.4  ;40% from original size
$newimagewidth = Round($iW * $scale, 0)
$newimageheight = Round($iH * $scale, 0)
$display = GUICreate("imaeg", $newimagewidth, $newimageheight, Int((@DesktopWidth - $newimagewidth) / 2), Int((@DesktopHeight - $newimageheight) / 2))
GUISetBkColor(0x000000)
$idPic = GUICtrlCreatePic("", 0, 0, $newimagewidth, $newimageheight)
$hBmp = ScaleImage($hImage, $newimagewidth, $newimageheight)
$hHBmp = _GDIPlus_BitmapCreateHBITMAPFromBitmap($hBmp )
_WinAPI_DeleteObject(GUICtrlSendMsg($idPic, 0x0172, 0, $hHBmp))
GUISetState(@SW_SHOW)


While 1
$nMsg = GUIGetMsg()
Switch $nMsg
    Case $GUI_EVENT_CLOSE
        _WinAPI_DeleteObject($hHBmp)
        _GDIPlus_ImageDispose($hBmp)
        _GDIPlus_Shutdown()
        Exit
EndSwitch
WEnd

Func ScaleImage($hImage, $iWidth, $iHeight,  $iInterpolationMode = 5, $iStride = 0, $iPixelFormat = 0x0026200A, $pScan0 = 0) ;coded by UEZ 2011
    Local Const $aResult = DllCall($ghGDIPDll, "uint", "GdipCreateBitmapFromScan0", "int", $iWidth, "int", $iHeight, "int", $iStride, "int", $iPixelFormat, "ptr", $pScan0, "int*", 0)
    Local Const $hBitmap = $aResult[6]
    Local Const $hGfxContext= _GDIPlus_ImageGetGraphicsContext($hBitmap)
    DllCall($ghGDIPDll, "uint", "GdipSetInterpolationMode", "handle", $hGfxContext, "int", $iInterpolationMode)
    _GDIPlus_GraphicsDrawImageRect($hGfxContext, $hImage, 0, 0, $iWidth, $iHeight)
    _GDIPlus_GraphicsDispose($hGfxContext)
    Return $hBitmap
EndFunc

Br,

UEZ

Edited by UEZ

Please don't send me any personal message and ask for support! I will not reply!

Selection of finest graphical examples at Codepen.io

The own fart smells best!
Her 'sikim hıyar' diyene bir avuç tuz alıp koşma!
¯\_(ツ)_/¯  ٩(●̮̮̃•̃)۶ ٩(-̮̮̃-̃)۶ૐ

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#5 ·  Posted (edited)

Sorry man, not looking good:

Posted Image

However I tried at my code again and it turns out the order was wrong:

$display = GUICreate("imaeg",$newimagewidth,$newimageheight,int((@DesktopWidth-$newimagewidth)/2),Int((@DesktopHeight-$newimageheight)/2))
GUISetState()
_GDIPlus_Startup()
$grafix = _GDIPlus_GraphicsCreateFromHWND($display)
_GDIPlus_GraphicsSetInterpolationMode($grafix,5);goes here
$hImage = _GDIPlus_ImageLoadFromFile($filename)
_GDIPlus_GraphicsDrawImageRect($grafix,$hImage,0,0,$newimagewidth,$newimageheight)
;not here

I tried looking at your code to see how to go from here, but I'm just not sure how to :D

By the way, the $filename simply comes from a fileopendialog. $newimagewidth and height are generated as the scaled down dimensions required to make the image fit in $form1 while mantaining the image's aspect ratio.

Edited by Cybergon

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I don't know what you exactly want but I updated the code post#4.

Is this what you are looking for?

Br,

UEZ


Please don't send me any personal message and ask for support! I will not reply!

Selection of finest graphical examples at Codepen.io

The own fart smells best!
Her 'sikim hıyar' diyene bir avuç tuz alıp koşma!
¯\_(ツ)_/¯  ٩(●̮̮̃•̃)۶ ٩(-̮̮̃-̃)۶ૐ

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Or maybe something more like this (tweaked UEZs excellent example)?

#include <GUIConstantsEx.au3>
#include <GDIPlus.au3>
$filename = FileOpenDialog("Select an image", "", "Images (*.jpg;*.png*;*.bmp;*.gif)", 3)
If @error Then Exit
_GDIPlus_Startup()
$hImage = _GDIPlus_ImageLoadFromFile($filename)
$iW = _GDIPlus_ImageGetWidth($hImage)
$iH = _GDIPlus_ImageGetHeight($hImage)
$hGUI = GUICreate("imaeg", 400, 400)
GUISetBkColor(0x000000)
$idPic = GUICtrlCreatePic("", 10, 10, 200, 200)
$hBmp = ScaleImage($hImage, $hGUI, $idPic)
$hHBmp = _GDIPlus_BitmapCreateHBITMAPFromBitmap($hBmp)
_WinAPI_DeleteObject(GUICtrlSendMsg($idPic, 0x0172, 0, $hHBmp))
GUISetState(@SW_SHOW)

While 1
 $nMsg = GUIGetMsg()
 Switch $nMsg
  Case $GUI_EVENT_CLOSE
   _WinAPI_DeleteObject($hHBmp)
   _GDIPlus_ImageDispose($hBmp)
   _GDIPlus_Shutdown()
   Exit
 EndSwitch
WEnd
Func ScaleImage($hImage, $hGUI, $iCtrl, $iInterpolationMode = 5, $iStride = 0, $iPixelFormat = 0x0026200A, $pScan0 = 0) ;coded by UEZ 2011
 Local $aControlPos = ControlGetPos($hGUI, "", $iCtrl)
 Local Const $aResult = DllCall($ghGDIPDll, "uint", "GdipCreateBitmapFromScan0", "int", $aControlPos[2], "int", $aControlPos[3], "int", $iStride, "int", $iPixelFormat, "ptr", $pScan0, "int*", 0)
 Local Const $hBitmap = $aResult[6]
 Local Const $hGfxContext = _GDIPlus_ImageGetGraphicsContext($hBitmap)
 DllCall($ghGDIPDll, "uint", "GdipSetInterpolationMode", "handle", $hGfxContext, "int", $iInterpolationMode)
 _GDIPlus_GraphicsDrawImageRect($hGfxContext, $hImage, 0, 0, $aControlPos[2], $aControlPos[3])
 _GDIPlus_GraphicsDispose($hGfxContext)
 Return $hBitmap
EndFunc   ;==>ScaleImage

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#8 ·  Posted (edited)

Thanks for all the input guys, I finally managed to get it on my GUI. I figured I'd just leave it as a GDIP graphics object. This is what it looks like:

Posted Image

Pretty good.

I'd leave it like that, but the thing bothering me now is the small gap between the arrows. What I could see from it is that the pixels are being rendered based on their center, rather than their top left corner, chopping out half a pixel from the top and left and at the same time leaving a little gap at the bottom right of the same distance.

The most practical way I could think of solving this was drawing the image 4 times to fill in those gaps.

This code is a bit lengthy, but I'll try to trim it down to the parts that matters:

#include <Array.au3>
#include <GDIP.au3>
#include <ButtonConstants.au3>
#include <EditConstants.au3>
#include <GUIConstantsEx.au3>
#include <StaticConstants.au3>
#include <WindowsConstants.au3>
#include <String.au3>
#Include <Math.au3>
Global Const $HX_REF="0123456789ABCDEF"

Local $filename, $aArr,$colors,$uniquecolors, $numberofcolors, $inputcolors[16], $Iinputcolors[16], $labelcolors[16], $Scale, $display, $imagewidth, $imageheight, $canvas[2], $centerpos[2]


$MainForm = GUICreate("CSV paint", 595, 372, Int((@DesktopWidth-595)/2),Int((@DesktopHeight-372)/2))
$newpatternbutton = GUICtrlCreateButton("Select new pattern", 384, 64, 105, 25)
$canvas[0] = GUICtrlCreateLabel("", 0, 0, 186, 372)
GUICtrlSetBkColor(-1, 0xF9F9F9)
$canvas[1] = GUICtrlCreateLabel("", 186, 0, 186, 372)
GUICtrlSetBkColor(-1, 0xF9F9F9)
GUISetState(@SW_SHOW)

If $CmdLine[0] > 0 Then
    WinSetState($MainForm,"",@SW_DISABLE)
    $filename = $CmdLine[1]
    goforit($colors,$uniquecolors)
    WinSetState($MainForm,"",@SW_ENABLE)
EndIf

While 1
    $nMsg = GUIGetMsg()
    Switch $nMsg
        Case $GUI_EVENT_CLOSE
            Exit
        Case $newpatternbutton
            goforit($colors,$uniquecolors)
            WinSetState($MainForm,"",@SW_ENABLE)
            WinActivate($MainForm)
    EndSwitch
WEnd

Func goforit(ByRef $colors,ByRef $uniquecolors)
    WinSetState($MainForm,"",@SW_DISABLE)
    $filename = FileOpenDialog("Get image",@DesktopDir,"Images(*.bmp;*.gif)")
    If @error = 1 Then Return
    WinActivate($MainForm)
    $return=0
    $return=_FileImageToArray($filename, $aArr, $return)
    if $return>0 then Return
    $imageheight = UBound($aArr, 1)
    $imagewidth = UBound($aArr, 2)
    Dim $colors[$imageheight * $imagewidth]

    $k = 0
    $numberofcolors = 0
    Local $sHold
    ProgressOn("Progress Bar", "Counting unique colors.", "0 percent",(@DesktopWidth/2)-150,(@DesktopHeight/2)-50,3)
    For $j = 0 to ($imageheight -1)
        ProgressSet(Int(100 * $j / ($imageheight -1)), Int(100 * $j / ($imageheight -1)) & " percent")
        For $i = 0 to ($imagewidth -1)
            If Not StringInStr("|" & $sHold, "|" & $aArr[$j][$i] & "|", 1) Then
                $sHold &= $aArr[$j][$i] & "|"
                $numberofcolors += 1
            EndIf
        Next
    Next
    ProgressOff()

    If $numberofcolors > 16 Then
        MsgBox(0,"Error","That's too many colors")
        Return
    EndIf

    If $sHold Then
        Dim $uniquecolors[$numberofcolors+1]
        $uniquecolors = StringSplit(StringTrimRight($sHold, 1), "|", 1)
    EndIf

    ;;;;;;;;;;;;;;;;
    ;;Modify Form1;;
    ;;;;;;;;;;;;;;;;

    For $i = 0 to 15
        GUICtrlDelete ($Iinputcolors[$i])
        GUICtrlDelete ($labelcolors[$i])
    Next
    For $i = 0 to $numberofcolors -1
        $labelcolors[$i] = GUICtrlCreateLabel("", 384, 96+(15*$i), 15, 15)
        GUICtrlSetBkColor(-1, "0x" & $uniquecolors[$i+1])
        $Iinputcolors[$i] = GUICtrlCreateInput("", 414, 96+(15*$i), 163, 15)
    Next
    $Scale = _Min(372 / $imagewidth, 372 / $imageheight)
    $newimagewidth = Int($imagewidth * $Scale)
    $newimageheight = Int($imageheight * $Scale)


    GUICtrlDelete ($canvas[0])
    GUICtrlDelete ($canvas[1])
    If $newimageheight > $newimagewidth Then
        $canvas[0] = GUICtrlCreateLabel("", 0, 0, Ceiling((372-$newimagewidth)/2), 372)
        GUICtrlSetBkColor(-1, 0xF9F9F9)
        $canvas[1] = GUICtrlCreateLabel("",Floor((372+$newimagewidth)/2), 0, Ceiling((372-$newimagewidth)/2), 372)
        GUICtrlSetBkColor(-1, 0xF9F9F9)
    Else
        $canvas[0] = GUICtrlCreateLabel("", 0, 0, 372, Ceiling((372-$newimageheight)/2))
        GUICtrlSetBkColor(-1, 0xF9F9F9)
        $canvas[1] = GUICtrlCreateLabel("", 0, Floor((372+$newimageheight)/2), 372, Ceiling((372-$newimageheight)/2))
        GUICtrlSetBkColor(-1, 0xF9F9F9)
    EndIf

    ;;;;;;;;;;;;;;;;;
    ;;Display Image;;
    ;;;;;;;;;;;;;;;;;
    _GDIPlus_Startup()
    $grafix = _GDIPlus_GraphicsCreateFromHWND($MainForm)
    _GDIPlus_GraphicsSetInterpolationMode($grafix,5)
    $hImage = _GDIPlus_ImageLoadFromFile($filename)
    If $newimageheight > $newimagewidth Then
        $littlegap = Int((372/$imageheight)/2)
    Else
        $littlegap = Int((372/$imagewidth)/2)
    EndIf
    _GDIPlus_GraphicsDrawImageRect($grafix,$hImage,(372-$newimagewidth)/2,(372-$newimageheight)/2,$newimagewidth,$newimageheight)
    _GDIPlus_GraphicsDrawImageRect($grafix,$hImage,(372-$newimagewidth)/2+$littlegap,(372-$newimageheight)/2,$newimagewidth,$newimageheight)
    _GDIPlus_GraphicsDrawImageRect($grafix,$hImage,(372-$newimagewidth)/2,(372-$newimageheight)/2+$littlegap,$newimagewidth,$newimageheight)
    _GDIPlus_GraphicsDrawImageRect($grafix,$hImage,(372-$newimagewidth)/2 +$littlegap,(372-$newimageheight)/2+$littlegap,$newimagewidth,$newimageheight)
    _GDIPlus_ImageDispose($hImage)
    _GDIPlus_GraphicsDispose($grafix)
    _GDIPlus_Shutdown()
EndFunc

;convert images to hex array, by malkey
Func _FileImageToArray($sFileName, ByRef $aArray, $Ireturn)
    Local $Reslt, $stride, $format, $Scan0, $iIW, $iIH, $hImage
    Local $v_Buffer, $width, $height
    _GDIPlus_Startup()
    $hImage = _GDIPlus_ImageLoadFromFile($sFileName)
    $iIW = _GDIPlus_ImageGetWidth($hImage)
    $iIH = _GDIPlus_ImageGetHeight($hImage)
    If ($iIW > 766) or ($iIH > 766) Then
        $warning = MsgBox(1,"Warning","This pattern is way too big, it won't even fit on the largest possible embark. Are you sure about this?")
        if $warning = 2 then
            Return 1
        EndIf
    EndIf

    ProgressOn("Progress Bar", "Filling a " & $iIW & " x " & $iIH & " size array.", "0 percent",(@DesktopWidth/2)-150,(@DesktopHeight/2)-50,3)
    $Reslt = _GDIPlus_BitmapLockBits($hImage, 0, 0, $iIW, $iIH, $GDIP_ILMREAD, $GDIP_PXF32ARGB)

    ;Get the returned values of _GDIPlus_BitmapLockBits ()
    $width = DllStructGetData($Reslt, "width")
    $height = DllStructGetData($Reslt, "height")
    $stride = DllStructGetData($Reslt, "stride")
    $format = DllStructGetData($Reslt, "format")
    $Scan0 = DllStructGetData($Reslt, "Scan0")

    Dim $aArray[$height][$width]
    For $j = 0 To $iIH - 1
        For $i = 0 To $iIW - 1
            $v_Buffer = DllStructCreate("dword", $Scan0 + ($j * $stride) + ($i * 4))
            $aArray[$j][$i] = Hex(DllStructGetData($v_Buffer, 1), 6)
        Next
        ProgressSet(Int(100 * $j / ($iIH)), Int(100 * $j / ($iIH)) & " percent")
    Next
    _GDIPlus_BitmapUnlockBits($hImage, $Reslt)
    ProgressOff()
    _GDIPlus_ImageDispose($hImage)
    _GDIPlus_Shutdown()
    Return
EndFunc

; #FUNCTION# ==============================================================
; Function Name..: _HexToDec ( "expression" )
; Description ...: Returns decimal expression of a hexadecimal string.
; Parameters ....: expression   - String representation of a hexadecimal expression to be converted to decimal.
; Return values .: Success    - Returns decimal expression of a hexadecimal string.
;                 Failure     - Returns "" (blank string) and sets @error to 1 if string is not hexadecimal type.
; Author ........: jennico (jennicoattminusonlinedotde)
; Remarks .......: working input format: "FFFF" or "0xFFFF" (string format), do NOT pass 0xFFFF without quotation marks (number format).
;              current AutoIt Dec() limitation: 0x7FFFFFFF (2147483647).
; Related .......: Hex(), Dec(), _DecToHex()
; =======================================================================
Func _HexToDecimal($hx_hex)
    If StringLeft($hx_hex, 2) = "0x" Then $hx_hex = StringMid($hx_hex, 3)
    If StringIsXDigit($hx_hex) = 0 Then
        SetError(1)
        MsgBox(0,"Error","Wrong input, try again ...")
        Return ""
    EndIf
    Local $ret="", $hx_count=0, $hx_array = StringSplit($hx_hex, ""), $Ii, $hx_tmp
    For $Ii = $hx_array[0] To 1 Step -1
        $hx_tmp = StringInStr($HX_REF, $hx_array[$Ii]) - 1
        $ret += $hx_tmp * 16 ^ $hx_count
        $hx_count += 1
    Next
    Return $ret
EndFunc

I know I didn't use UEZ's code, but still thanks again for the help. Let me know what you guys think and if there is a more elegant way of doing it. I'll be busy finishing this little app (if you're wondering what it is, it's a utility for the Lazy Newb Pack, to replace Chromafort, please don't ban me). I'll post it on example scripts, if you guys have no problem with that.

Edited by Cybergon

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