RyukShini

Image quality is bad compared to paint

17 posts in this topic

#Region ;**** Directives created by AutoIt3Wrapper_GUI ****
#AutoIt3Wrapper_Icon=car.ico
#EndRegion ;**** Directives created by AutoIt3Wrapper_GUI ****
#include <GDIPlus.au3>
#include <File.au3>
#include <Array.au3>
#include <ColorConstants.au3>
#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <ProgressConstants.au3>

; Declare array
Dim $Images[1]
; Gets all JPG files in the current directory (@ScriptDir).
Local $search = FileFindFirstFile("*.jpg")

; Check if the search was successful
If $search = -1 Then
    MsgBox(0, "Error", "No JPG files could be found.")
    Exit
EndIf

; Resize array
While 1
    If IsArray($Images) Then
        Local $Bound = UBound($Images)
        ReDim $Images[$Bound+1]
    EndIf
    $Images[$Bound] = FileFindNextFile($search)
    If @error Then ExitLoop
WEnd

; Close the search handle
FileClose($search)

; Create directory "resized" if not there yet
$nymappe = InputBox("Mappe / Bil Navn", "Mappe / Bil Navn")
If NOT FileExists(@ScriptDir & "\" & $nymappe & "\") Then
    DirCreate(@ScriptDir & "\" & $nymappe & "\")
EndIf

; Loop for JPGs - gets dimension of JPG and calls resize function to resize to 50% width and 50% height
For $i = 1 to Ubound($Images)-1
    If $Images[$i] <> "" AND FileExists(@ScriptDir & "\" & $Images[$i]) Then
        Local $ImagePath = @ScriptDir & "\" & $Images[$i]
        _GDIPlus_Startup()
        Local $hImage = _GDIPlus_ImageLoadFromFile($ImagePath)
        Local $ImageWidth = _GDIPlus_ImageGetWidth($hImage)
        Local $ImageHeight = _GDIPlus_ImageGetHeight($hImage)
        _GDIPlus_ImageDispose($hImage)
        _GDIPlus_Shutdown()
        ;MsgBox(0,"DEBUG", $ImageWidth & " x " & $ImageHeight)
        Local $NewImageWidth = ($ImageWidth / 100) * 15
        Local $NewImageHeight = ($ImageHeight / 100) * 15

        ;MsgBox(0,"DEBUG: " & $i,$Images[$i])
        _ImageResize(@ScriptDir & "\" & $Images[$i], @ScriptDir & "\" & $nymappe & "\" & $Images[$i], $NewImageWidth, $NewImageHeight)
    EndIf
Next

; Resize function
Func _ImageResize($sInImage, $sOutImage, $iW, $iH)
    Local $hWnd, $hDC, $hBMP, $hImage1, $hImage2, $hGraphic, $CLSID, $i = 0

    ;OutFile path, to use later on.
    Local $sOP = StringLeft($sOutImage, StringInStr($sOutImage, "\", 0, -1))

    ;OutFile name, to use later on.
    Local $sOF = StringMid($sOutImage, StringInStr($sOutImage, "\", 0, -1) + 1)

    ;OutFile extension , to use for the encoder later on.
    Local $Ext = StringUpper(StringMid($sOutImage, StringInStr($sOutImage, ".", 0, -1) + 1))

    ; Win api to create blank bitmap at the width and height to put your resized image on.
    $hWnd = _WinAPI_GetDesktopWindow()
    $hDC = _WinAPI_GetDC($hWnd)
    $hBMP = _WinAPI_CreateCompatibleBitmap($hDC, $iW, $iH)
    _WinAPI_ReleaseDC($hWnd, $hDC)

    ;Start GDIPlus
    _GDIPlus_Startup()

    ;Get the handle of blank bitmap you created above as an image
    $hImage1 = _GDIPlus_BitmapCreateFromHBITMAP ($hBMP)

    ;Load the image you want to resize.
    $hImage2 = _GDIPlus_ImageLoadFromFile($sInImage)

    ;Get the graphic context of the blank bitmap
    $hGraphic = _GDIPlus_ImageGetGraphicsContext ($hImage1)

    ;Draw the loaded image onto the blank bitmap at the size you want
    _GDIPLus_GraphicsDrawImageRect($hGraphic, $hImage2, 0, 0, $iW, $iH)

    ;Get the encoder of to save the resized image in the format you want.
    $CLSID = _GDIPlus_EncodersGetCLSID($Ext)

    ;Generate a number for out file that doesn't already exist, so you don't overwrite an existing image.
    Do
        $i += 1
    Until (Not FileExists($sOP & $i & "_" & $sOF))

    ;Prefix the number to the begining of the output filename
    $sOutImage = $sOP & $i & "_" & $sOF

    ;Save the new resized image.
    _GDIPlus_ImageSaveToFileEx($hImage1, $sOutImage, $CLSID)

    ;Clean up and shutdown GDIPlus.
    _GDIPlus_ImageDispose($hImage1)
    _GDIPlus_ImageDispose($hImage2)
    _GDIPlus_GraphicsDispose ($hGraphic)
    _WinAPI_DeleteObject($hBMP)
    _GDIPlus_Shutdown()


EndFunc

Quality gets quite bad compared to using Paint / Photoshop when resizing with GDIPlus
Any idea how to make the quality better?
Thanks in advance

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#2 ·  Posted (edited)

Try the built-in functions

_GDIPlus_ImageResize
_GDIPlus_ImageScale

Further it makes no sense to  call _GDIPlus_Startup() / _GDIPlus_Shutdown() in a loop. Just call _GDIPlus_Startup() once when you start the script and _GDIPlus_Shutdown() when you exit.

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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22 minutes ago, UEZ said:

Try the built-in functions

_GDIPlus_ImageResize
_GDIPlus_ImageScale

Further it makes no sense to  call _GDIPlus_Startup() / _GDIPlus_Shutdown() in a loop. Just call _GDIPlus_Startup() once when you start the script and _GDIPlus_Shutdown() when you exit.

Thank you I will look in to that.
Could you give me a small example?:sweating:

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Just now, RyukShini said:

Could you give me a small example?:sweating:

What about the examples in the help file?


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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20 minutes ago, UEZ said:

What about the examples in the help file?

Oh sorry, of course!
 

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#Region ;**** Directives created by AutoIt3Wrapper_GUI ****
#AutoIt3Wrapper_Icon=car.ico
#EndRegion ;**** Directives created by AutoIt3Wrapper_GUI ****
#include <GDIPlus.au3>
#include <File.au3>
#include <Array.au3>
#include <ColorConstants.au3>
#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <ProgressConstants.au3>

; Declare array
Dim $Images[1]
; Gets all JPG files in the current directory (@ScriptDir).
Local $search = FileFindFirstFile("*.jpg")

; Check if the search was successful
If $search = -1 Then
    MsgBox(0, "Error", "No JPG files could be found.")
    Exit
EndIf

;if no exit then startup gdi
_GDIPlus_Startup()

; Resize array
While 1
    If IsArray($Images) Then
        Local $Bound = UBound($Images)
        ReDim $Images[$Bound+1]
    EndIf
    $Images[$Bound] = FileFindNextFile($search)
    If @error Then ExitLoop
WEnd

; Close the search handle
FileClose($search)

; Create directory "resized" if not there yet
$nymappe = InputBox("Mappe / Bil Navn", "Mappe / Bil Navn")
If NOT FileExists(@ScriptDir & "\" & $nymappe & "\") Then
    DirCreate(@ScriptDir & "\" & $nymappe & "\")
EndIf

; Loop for JPGs - gets dimension of JPG and calls resize function to resize to 50% width and 50% height
For $i = 1 to Ubound($Images)-1
    If $Images[$i] <> "" AND FileExists(@ScriptDir & "\" & $Images[$i]) Then
        Local $ImagePath = @ScriptDir & "\" & $Images[$i]
        _GDIPlus_Startup()
        Local $hImage = _GDIPlus_ImageLoadFromFile($ImagePath)
        Local $ImageWidth = _GDIPlus_ImageGetWidth($hImage)
        Local $ImageHeight = _GDIPlus_ImageGetHeight($hImage)
        _GDIPlus_ImageDispose($hImage)
        _GDIPlus_Shutdown()
        ;MsgBox(0,"DEBUG", $ImageWidth & " x " & $ImageHeight)
        Local $NewImageWidth = ($ImageWidth / 100) * 15
        Local $NewImageHeight = ($ImageHeight / 100) * 15

        ;MsgBox(0,"DEBUG: " & $i,$Images[$i])
        _ImageResize(@ScriptDir & "\" & $Images[$i], @ScriptDir & "\" & $nymappe & "\" & $Images[$i], $NewImageWidth, $NewImageHeight)
    EndIf
Next

; Resize function
Func _ImageResize($sInImage, $sOutImage, $iW, $iH)

    ;OutFile path, to use later on.
    Local $sOP = StringLeft($sOutImage, StringInStr($sOutImage, "\", 0, -1))

    ;OutFile name, to use later on.
    Local $sOF = StringMid($sOutImage, StringInStr($sOutImage, "\", 0, -1) + 1)

    ;OutFile extension , to use for the encoder later on.
    Local $Ext = StringUpper(StringMid($sOutImage, StringInStr($sOutImage, ".", 0, -1) + 1))

    ;Load the image you want to resize.
    $hImage = _GDIPlus_ImageLoadFromFile ($sInImage)

    ;Resize
    $hBitmap_Scaled = _GDIPlus_ImageResize($hImage, $iW, $iH)

    ;U can test this too
    ;$hBitmap_Scaled = _GDIPlus_ImageScale($hImage, 0.15, 0.15)

    ;Get the encoder of to save the resized image in the format you want.
    $CLSID = _GDIPlus_EncodersGetCLSID($Ext)

    ;Generate a number for out file that doesn't already exist, so you don't overwrite an existing image.
    Do
        $i += 1
    Until (Not FileExists($sOP & $i & "_" & $sOF))

    ;Prefix the number to the begining of the output filename
    $sOutImage = $sOP & $i & "_" & $sOF

    ;Save the new resized image.
    _GDIPlus_ImageSaveToFileEx($hBitmap_Scaled, $sOutImage, $CLSID)

    ;Clean up and shutdown GDIPlus.
    _GDIPlus_ImageDispose($hImage)
    _GDIPlus_BitmapDispose($hBitmap_Scaled)

EndFunc

_GDIPlus_Shutdown()

 

im not sure if this improve quality.

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#8 ·  Posted (edited)

58 minutes ago, Synapsee said:
#Region ;**** Directives created by AutoIt3Wrapper_GUI ****
#AutoIt3Wrapper_Icon=car.ico
#EndRegion ;**** Directives created by AutoIt3Wrapper_GUI ****
#include <GDIPlus.au3>
#include <File.au3>
#include <Array.au3>
#include <ColorConstants.au3>
#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <ProgressConstants.au3>

; Declare array
Dim $Images[1]
; Gets all JPG files in the current directory (@ScriptDir).
Local $search = FileFindFirstFile("*.jpg")

; Check if the search was successful
If $search = -1 Then
    MsgBox(0, "Error", "No JPG files could be found.")
    Exit
EndIf

;if no exit then startup gdi
_GDIPlus_Startup()

; Resize array
While 1
    If IsArray($Images) Then
        Local $Bound = UBound($Images)
        ReDim $Images[$Bound+1]
    EndIf
    $Images[$Bound] = FileFindNextFile($search)
    If @error Then ExitLoop
WEnd

; Close the search handle
FileClose($search)

; Create directory "resized" if not there yet
$nymappe = InputBox("Mappe / Bil Navn", "Mappe / Bil Navn")
If NOT FileExists(@ScriptDir & "\" & $nymappe & "\") Then
    DirCreate(@ScriptDir & "\" & $nymappe & "\")
EndIf

; Loop for JPGs - gets dimension of JPG and calls resize function to resize to 50% width and 50% height
For $i = 1 to Ubound($Images)-1
    If $Images[$i] <> "" AND FileExists(@ScriptDir & "\" & $Images[$i]) Then
        Local $ImagePath = @ScriptDir & "\" & $Images[$i]
        _GDIPlus_Startup()
        Local $hImage = _GDIPlus_ImageLoadFromFile($ImagePath)
        Local $ImageWidth = _GDIPlus_ImageGetWidth($hImage)
        Local $ImageHeight = _GDIPlus_ImageGetHeight($hImage)
        _GDIPlus_ImageDispose($hImage)
        _GDIPlus_Shutdown()
        ;MsgBox(0,"DEBUG", $ImageWidth & " x " & $ImageHeight)
        Local $NewImageWidth = ($ImageWidth / 100) * 15
        Local $NewImageHeight = ($ImageHeight / 100) * 15

        ;MsgBox(0,"DEBUG: " & $i,$Images[$i])
        _ImageResize(@ScriptDir & "\" & $Images[$i], @ScriptDir & "\" & $nymappe & "\" & $Images[$i], $NewImageWidth, $NewImageHeight)
    EndIf
Next

; Resize function
Func _ImageResize($sInImage, $sOutImage, $iW, $iH)

    ;OutFile path, to use later on.
    Local $sOP = StringLeft($sOutImage, StringInStr($sOutImage, "\", 0, -1))

    ;OutFile name, to use later on.
    Local $sOF = StringMid($sOutImage, StringInStr($sOutImage, "\", 0, -1) + 1)

    ;OutFile extension , to use for the encoder later on.
    Local $Ext = StringUpper(StringMid($sOutImage, StringInStr($sOutImage, ".", 0, -1) + 1))

    ;Load the image you want to resize.
    $hImage = _GDIPlus_ImageLoadFromFile ($sInImage)

    ;Resize
    $hBitmap_Scaled = _GDIPlus_ImageResize($hImage, $iW, $iH)

    ;U can test this too
    ;$hBitmap_Scaled = _GDIPlus_ImageScale($hImage, 0.15, 0.15)

    ;Get the encoder of to save the resized image in the format you want.
    $CLSID = _GDIPlus_EncodersGetCLSID($Ext)

    ;Generate a number for out file that doesn't already exist, so you don't overwrite an existing image.
    Do
        $i += 1
    Until (Not FileExists($sOP & $i & "_" & $sOF))

    ;Prefix the number to the begining of the output filename
    $sOutImage = $sOP & $i & "_" & $sOF

    ;Save the new resized image.
    _GDIPlus_ImageSaveToFileEx($hBitmap_Scaled, $sOutImage, $CLSID)

    ;Clean up and shutdown GDIPlus.
    _GDIPlus_ImageDispose($hImage)
    _GDIPlus_BitmapDispose($hBitmap_Scaled)

EndFunc

_GDIPlus_Shutdown()

 

im not sure if this improve quality.

It did not, thank you a lot for trying, but it didn't make any changes really :/
Both of these:
 

;Resize
    $hBitmap_Scaled = _GDIPlus_ImageResize($hImage, $iW, $iH)

    ;U can test this too
    ;$hBitmap_Scaled = _GDIPlus_ImageScale($hImage, 0.15, 0.15)

 

Edited by RyukShini

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#9 ·  Posted (edited)

maybe can u post 2 img. the original one and the paint result u target. like this we can see the quality problem and wait a "GDI expert" solution.

I prefer a full AutoIt Version but maybe u can look on a tiers party software (with command line) for improve quality.

Edited by Synapsee

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wow ! i have a solution, we need set the quality jpeg encoder setting, by default seems not be quality=100.

 

...
    ;Get the encoder of to save the resized image in the format you want.
    $CLSID = _GDIPlus_EncodersGetCLSID($Ext)






    ; code found here :
    ; https://www.autoitscript.com/autoit3/docs/libfunctions/_GDIPlus_ImageSaveToStream.htm
    
        Local $sImgCLSID = _GDIPlus_EncodersGetCLSID("jpg") ;create CLSID for a JPG image file type
        Local $tGUID = _WinAPI_GUIDFromString($sImgCLSID) ;convert CLSID GUID to binary form and returns $tagGUID structure
        Local $tParams = _GDIPlus_ParamInit(1) ;initialize an encoder parameter list and return $tagGDIPENCODERPARAMS structure
        Local $tData = DllStructCreate("int Quality") ;create struct to set JPG quality setting
        DllStructSetData($tData, "Quality", 100) ;quality 0-100 (0: lowest, 100: highest)
        Local $pData = DllStructGetPtr($tData) ;get pointer from quality struct
        _GDIPlus_ParamAdd($tParams, $GDIP_EPGQUALITY, 1, $GDIP_EPTLONG, $pData) ;add a value to an encoder parameter list




    ;Generate a number for out file that doesn't already exist, so you don't overwrite an existing image.
    Do
        $i += 1
    Until (Not FileExists($sOP & $i & "_" & $sOF))

    ;Prefix the number to the begining of the output filename
    $sOutImage = $sOP & $i & "_" & $sOF




    ;Save the new resized image.
    _GDIPlus_ImageSaveToFileEx($hBitmap_Scaled, $sOutImage, $CLSID)
    _GDIPlus_ImageSaveToFileEx($hBitmap_Scaled, $sOutImage & "2.jpg", $CLSID, $tParams); <=========== create a 100% quality output
...

 

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1 hour ago, Synapsee said:

wow ! i have a solution, we need set the quality jpeg encoder setting, by default seems not be quality=100.

 

...
    ;Get the encoder of to save the resized image in the format you want.
    $CLSID = _GDIPlus_EncodersGetCLSID($Ext)






    ; code found here :
    ; https://www.autoitscript.com/autoit3/docs/libfunctions/_GDIPlus_ImageSaveToStream.htm
    
        Local $sImgCLSID = _GDIPlus_EncodersGetCLSID("jpg") ;create CLSID for a JPG image file type
        Local $tGUID = _WinAPI_GUIDFromString($sImgCLSID) ;convert CLSID GUID to binary form and returns $tagGUID structure
        Local $tParams = _GDIPlus_ParamInit(1) ;initialize an encoder parameter list and return $tagGDIPENCODERPARAMS structure
        Local $tData = DllStructCreate("int Quality") ;create struct to set JPG quality setting
        DllStructSetData($tData, "Quality", 100) ;quality 0-100 (0: lowest, 100: highest)
        Local $pData = DllStructGetPtr($tData) ;get pointer from quality struct
        _GDIPlus_ParamAdd($tParams, $GDIP_EPGQUALITY, 1, $GDIP_EPTLONG, $pData) ;add a value to an encoder parameter list




    ;Generate a number for out file that doesn't already exist, so you don't overwrite an existing image.
    Do
        $i += 1
    Until (Not FileExists($sOP & $i & "_" & $sOF))

    ;Prefix the number to the begining of the output filename
    $sOutImage = $sOP & $i & "_" & $sOF




    ;Save the new resized image.
    _GDIPlus_ImageSaveToFileEx($hBitmap_Scaled, $sOutImage, $CLSID)
    _GDIPlus_ImageSaveToFileEx($hBitmap_Scaled, $sOutImage & "2.jpg", $CLSID, $tParams); <=========== create a 100% quality output
...

 

Amazing!
Will definitely try this when I get back to work.

Thanks a lot ;)

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@Synapsee

 

It still has a bit of quality loss but it made it better, thank you for trying but Its still not as good as paint?
 

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can u post the file source jpg for sample ?

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#14 ·  Posted (edited)

2 hours ago, Synapsee said:

can u post the file source jpg for sample ?

I can give you a * 15 with paint and * 15 GDI plus!
Would you like that?

Still not good enough quality!
let me know and i'll sent you 2 pics.

Edited by RyukShini

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Why not saving in PNG format?


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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3 minutes ago, UEZ said:

Why not saving in PNG format?

Do you expect the quality to be better?
It still doesn't change the fact that Paint makes the quality better than GDIPlus for .jpg images.

But thank you for the suggestion!

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On ‎08‎.‎07‎.‎2016 at 3:36 PM, RyukShini said:

Paint makes the quality better than GDIPlus for .jpg images

Is still actual?

#include <ScreenCapture.au3>

$hBMP = _ScreenCapture_Capture()

; GDI+ resizign
_GDIPlus_Startup()
$hImage = _GDIPlus_BitmapCreateFromHBITMAP($hBMP)
$hScale = _GDIPlus_ImageScale($hImage, 0.5, 0.5)
_GDIPlus_ImageSaveToFile($hScale, "GDIP.jpg")

; gdi32 resizing
$iW = _GDIPlus_ImageGetWidth($hImage)
$iH = _GDIPlus_ImageGetHeight($hImage)
$iW2 = $iW / 2
$iH2 = $iH / 2
$hDC = _WinAPI_GetDC(0)
$hDC1 = _WinAPI_CreateCompatibleDC($hDC)
_WinAPI_SelectObject($hDC1, $hBMP)
$hDC2 = _WinAPI_CreateCompatibleDC($hDC)
$hBMP2 = _WinAPI_CreateCompatibleBitmap($hDC, $iW2, $iH2)
_WinAPI_SelectObject($hDC2, $hBMP2)

_WinAPI_SetStretchBltMode($hDC2, 3) ; looks like Paint resizing
;~ _WinAPI_SetStretchBltMode($hDC2, 4) ; looks better than Paint

_WinAPI_StretchBlt($hDC2, 0, 0, $iW2, $iH2, $hDC1, 0, 0, $iW, $iH, 0x00CC0020) ; $SRCCOPY
$hBitmap = _GDIPlus_BitmapCreateFromHBITMAP($hBMP2)
_GDIPlus_ImageSaveToFile($hBitmap, "Paint.jpg")

; cleaning
_WinAPI_DeleteObject($hBMP)
_WinAPI_DeleteObject($hBMP2)
_WinAPI_ReleaseDC(0, $hDC)
_WinAPI_DeleteDC($hDC1)
_WinAPI_DeleteDC($hDC2)
_GDIPlus_ImageDispose($hScale)
_GDIPlus_ImageDispose($hImage)
_GDIPlus_ImageDispose($hBitmap)
_GDIPlus_Shutdown()

 

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      By youtuber
      $hImage = _GDIPlus_ImageLoadFromFile($aImageSave) $X1 = _GDIPlus_ImageGetWidth($hImage) $Y1 = _GDIPlus_ImageGetHeight($hImage) $X2 = _GDIPlus_ImageGetWidth($hImage) $Y2 = _GDIPlus_ImageGetHeight($hImage) $hGraphic = _GDIPlus_ImageGetGraphicsContext ($hImage) $hGraphic = _GDIPlus_GraphicsCreateFromHWND($Form1) ;$PicPreview = GUICtrlCreatePic("", 24, 152, 572, 268) _GDIPlus_GraphicsDrawImage ($hGraphic, 24, 152, 572, 268);? I have the same size and relative coords to $PicPreview in the image placement form1 I want to be 
       
      Other Responsibility Is there a problem with _GDIPlus code sorting?
      #include <GDIPlus.au3> #include <GuiConstantsEx.au3> #include <ButtonConstants.au3> #include <EditConstants.au3> #include <GUIConstantsEx.au3> #include <StaticConstants.au3> #include <WindowsConstants.au3> Global $Form1, $hImage, $hGraphic, $OpenPictures, $PicPreview _GDIPlus_StartUp() $Form1 = GUICreate("Form1", 615, 438, 374, 347) $PicPreview = GUICtrlCreatePic("", 24, 152, 572, 268) $ButtonPreview = GUICtrlCreateButton("Preview", 520, 112, 75, 25) $InputImageDir = GUICtrlCreateInput("", 64, 48, 177, 21) $ButtonOpen = GUICtrlCreateButton("...", 256, 48, 75, 25) $ButtonWatermark = GUICtrlCreateButton("Watermark Add", 256, 112, 80, 25) GUISetState(@SW_SHOW) While 1 $nMsg = GUIGetMsg() Switch $nMsg Case $GUI_EVENT_CLOSE _GDIPlus_GraphicsDispose($hGraphic) _GDIPlus_ImageDispose($hImage) _GDIPlus_ShutDown() Exit Case $ButtonOpen $OpenPictures = FileOpenDialog("Where are the pictures?", @ScriptDir & "\", "Picture format (*.jpg;*.bmp;*.png)", $FD_FILEMUSTEXIST + $FD_MULTISELECT) If Not $OpenPictures Then MsgBox(64, "İnfo","No Files Selected!",5) Else GUICtrlSetData($InputImageDir,$OpenPictures) EndIf Case $ButtonWatermark $aImageLoad = $OpenPictures $aImageSave = @ScriptDir & "\Save.png" $aImageLogo = @ScriptDir & "\Logo.png" _Watermark($aImageSave, $aImageLoad, $aImageLogo) Case $ButtonPreview $hImage = _GDIPlus_ImageLoadFromFile($aImageSave) $X1 = _GDIPlus_ImageGetWidth($hImage) $Y1 = _GDIPlus_ImageGetHeight($hImage) $X2 = _GDIPlus_ImageGetWidth($hImage) $Y2 = _GDIPlus_ImageGetHeight($hImage) $hGraphic = _GDIPlus_ImageGetGraphicsContext ($hImage) $hGraphic = _GDIPlus_GraphicsCreateFromHWND($Form1) ;$PicPreview = GUICtrlCreatePic("", 24, 152, 572, 268) _GDIPlus_GraphicsDrawImage ($hGraphic, 24, 152, 572, 268) EndSwitch WEnd Func _Watermark($sFile2, $sFile, $sLogo) Local $hImage1, $hImage2, $hGraphic _GDIPlus_Startup () $hImage1 = _GDIPlus_ImageLoadFromFile ($sFile) ; image $X1 = _GDIPlus_ImageGetWidth ($hImage1) $Y1 = _GDIPlus_ImageGetHeight ($hImage1) $hImage2 = _GDIPlus_ImageLoadFromFile ($sLogo) ; logo $X2 = _GDIPlus_ImageGetWidth ($hImage2) $Y2 = _GDIPlus_ImageGetHeight ($hImage2) $hGraphic = _GDIPlus_ImageGetGraphicsContext ($hImage1) _GDIPlus_GraphicsDrawImage ($hGraphic, $hImage2, 20, $Y1-$Y2-30) _GDIPlus_ImageSaveToFile ($hImage1, $sFile2) ; image watermarked _GDIPlus_ImageDispose ($hImage1) _GDIPlus_ImageDispose ($hImage2) _GDIPlus_ShutDown () EndFunc ;==>_Watermark  
    • tcurran
      By tcurran
      Here are two functions to provide pixel-accurate height and width dimensions for a given string.
      The more commonly-used _GDIPlus_GraphicsMeasureString built-in UDF is problematic because it returns the width padded by roughly one en-space (for reasons related to the various ways Windows produces anti-aliased fonts).
      These are AutoIt translations of Pierre Arnaud's C# functions, described in his CodeProject article "Bypass Graphics.MeasureString limitations"
      The first is an all-purpose version that takes a window handle, string, font family, font size (in points), style, and (optionally) width of the layout column (in pixels) as parameters.
      The second, more efficient version is intended for applications where GDI+ fonts are already in use, and takes handles to the existing graphics context, string, font, layout and format as parameters.
      Both functions return a two-row array with the exact width [0] and height [1] of the string (in pixels).
      EDIT: (Note that some of the same anti-aliasing measurement issues still apply. I did my best to work around them, but the output of the function may still be off by a pixel or two. Buyer beware.)
      #include <GDIPlus.au3> #include <GUIConstantsEx.au3> ; #FUNCTION# ==================================================================================================================== ; Name ..........: _StringInPixels ; Description ...: Returns a pixel-accurate height and width for a given string using a given font, style and size. ; Syntax ........: _StringInPixels($hGUI, $sString, $sFontFamily, $fSize, $iStyle[, $iColWidth = 0]) ; Parameters ....: $hGUI - Handle to the window. ; $sString - The string to be measured. ; $sFontFamily - Full name of the font to use. ; $fSize - Font size in points (half-point increments). ; $iStyle - Combination of 0-normal, 1-bold, 2-italic, 4-underline, 8-strikethrough ; $iColWidth - [optional] If word-wrap is desired, column width in pixels ; Return values .: 2-row array. [0] is width in pixels; [1] is height in pixels. ; Author ........: Tim Curran; adapted from Pierre Arnaud's C# function ; Modified ......: ; Remarks .......: This version is longer and less efficient but works for all purposes. ; Related .......: <https://www.codeproject.com/Articles/2118/Bypass-Graphics-MeasureString-limitations> ; Link ..........: ; Example .......: Example-StringInPixels.au3 ; =============================================================================================================================== #include <GDIPlus.au3> #include <GUIConstantsEx.au3> Func _StringInPixels($hGUI, $sString, $sFontFamily, $fSize, $iStyle, $iColWidth = 0) _GDIPlus_Startup() Local $hGraphic = _GDIPlus_GraphicsCreateFromHWND($hGUI) ;Create a graphics object from a window handle Local $aRanges[2][2] = [[1]] $aRanges[1][0] = 0 ;Measure first char (0-based) $aRanges[1][1] = StringLen($sString) ;Region = String length Local $hFormat = _GDIPlus_StringFormatCreate() Local $hFamily = _GDIPlus_FontFamilyCreate($sFontFamily) Local $hFont = _GDIPlus_FontCreate($hFamily, $fSize, $iStyle) _GDIPlus_GraphicsSetTextRenderingHint($hGraphic, $GDIP_TEXTRENDERINGHINT_ANTIALIASGRIDFIT) _GDIPlus_StringFormatSetMeasurableCharacterRanges($hFormat, $aRanges) ;Set ranges Local $aWinClient = WinGetClientSize($hGUI) If $iColWidth = 0 Then $iColWidth = $aWinClient[0] Local $tLayout = _GDIPlus_RectFCreate(10, 10, $iColWidth, $aWinClient[1]) Local $aRegions = _GDIPlus_GraphicsMeasureCharacterRanges($hGraphic, $sString, $hFont, $tLayout, $hFormat) ;get array of regions Local $aBounds = _GDIPlus_RegionGetBounds($aRegions[1], $hGraphic) Local $aWidthHeight[2] = [$aBounds[2], $aBounds[3]] ; Clean up resources _GDIPlus_FontDispose($hFont) _GDIPlus_RegionDispose($aRegions[1]) _GDIPlus_FontFamilyDispose($hFamily) _GDIPlus_StringFormatDispose($hFormat) _GDIPlus_GraphicsDispose($hGraphic) _GDIPlus_Shutdown() Return $aWidthHeight EndFunc ;==>_StringInPixels ; #FUNCTION# ==================================================================================================================== ; Name ..........: _StringInPixels_gdip ; Description ...: Returns a pixel-accurate height and width for a given string using a GDI+ font, layout and format ; Syntax ........: _StringInPixels_gdip($hGraphic, $sString, $hFont, $tLayout, $hFormat) ; Parameters ....: $hGraphic - Handle to a GDI+ graphics object. ; $sString - The string to be measured. ; $hFont - Handle to a GDI+ font. ; $tLayout - A $tagGDIPRECTF structure that bounds the string. ; $hFormat - Handle to a GDI+ string format. ; Return values .: 2-row array. [0] is width in pixels; [1] is height in pixels. ; Author ........: Tim Curran; adapted from Pierre Arnaud's C# function ; Modified ......: ; Remarks .......: This much more efficient version is for use with GDI+ fonts ; Related .......: ; Link ..........: <https://www.codeproject.com/Articles/2118/Bypass-Graphics-MeasureString-limitations> ; Example .......: Example-StringInPixels.au3 ; =============================================================================================================================== #include <GDIPlus.au3> #include <GUIConstantsEx.au3> Func _StringInPixels_gdip($hGraphic, $sString, $hFont, $tLayout, $hFormat) Local $aRanges[2][2] = [[1]] $aRanges[1][0] = 0 ;Measure first char (0-based) $aRanges[1][1] = StringLen($sString) ;Region = String length _GDIPlus_GraphicsSetTextRenderingHint($hGraphic, $GDIP_TEXTRENDERINGHINT_CLEARTYPEGRIDFIT) _GDIPlus_StringFormatSetMeasurableCharacterRanges($hFormat, $aRanges) ;Set ranges Local $aRegions = _GDIPlus_GraphicsMeasureCharacterRanges($hGraphic, $sString, $hFont, $tLayout, $hFormat) ;get array of regions Local $aBounds = _GDIPlus_RegionGetBounds($aRegions[1], $hGraphic) Local $aWidthHeight[2] = [$aBounds[2], $aBounds[3]] _GDIPlus_RegionDispose($aRegions[1]) Return $aWidthHeight EndFunc ;==>_StringInPixels_gdip  
      _StringInPixels.au3
      Example-StringInPixels.au3
    • c.haslam
      By c.haslam
      In the code that follows, it appears that DllStructCreate() is not allocating memory in
      $tag = 'byte val['&$iLength&']' . . Static Local $tvalue = DllStructCreate($tag) Running the code below, the problem does not show, but it does show in a much longer script: there _GDIPlus_ImageSaveToFile only writes about 30K bytes when it should write about 1MB, which it does when the code is
      $tag = 'char val['&$iLength&']' . . Static Local $tvalue = DllStructCreate($tag) It should write about 1 MB.
      I suggest caution in running the code below. On my PC, it caused a second instance of SciTE to appear at the top left of the Desktop, showing only the title bar, with a width of only approximately 200 pixels! Then rebooting the PC showed this at login. Further, double-clicking on the SciTE shortcut on the Desktop showed SciTE in the same way! (After running Regedit, and searching for SciTE, the shortcut behaves normally.)
      I would appreciate help in determining whether or not there is a bug in DLLStructCreate, preferably a way which does not clobber Windows. Of course, It is possible that there is a bug in my code.
      I have made $tvalue Static in the hope that this might make the code run properly. Doing this did not help.
      My code is based on code written by Authenticity and ChrisL.
      #include <GDIPlus.au3> #include <Array.au3> Opt('MustDeclareVars',1) ; Property Item structure Global Const $tagGDIPPROPERTYITEM = _ "uint id;" & _ ; ID of this property "ulong length;" & _ ; Length of the property value, in bytes "word type;" & _ ; Type of the value, as one of TAG_TYPE_XXX constants "ptr pvalue;" ; pointer to property value ; Image property types constants ; Ref: https://www.media.mit.edu/pia/Research/deepview/exif.html Global Const $GDIP_PROPERTYTAGTYPEUBYTE = 1 Global Const $GDIP_PROPERTYTAGTYPEASCII = 2 Global Const $GDIP_PROPERTYTAGTYPEUSHORT = 3 Global Const $GDIP_PROPERTYTAGTYPEULONG = 4 Global Const $GDIP_PROPERTYTAGTYPEURATIONAL = 5 Global Const $GDIP_PROPERTYTAGTYPESBYTE = 6 Global Const $GDIP_PROPERTYTAGTYPEUNDEFINED = 7 Global Const $GDIP_PROPERTYTAGTYPESSHORT = 8 Global Const $GDIP_PROPERTYTAGTYPESLONG = 9 Global Const $GDIP_PROPERTYTAGTYPESRATIONAL = 10 Global Const $GDIP_PROPERTYTAGTYPESFLOAT = 11 Global Const $GDIP_PROPERTYTAGTYPEDFLOAT = 12 main() Func main() _GDIPlus_Startup() Local $hImage = _GDIPlus_ImageLoadFromFile('H:\temp\AP test data\DSC00824 - Copy.jpg') Local $ar = _GDIPlus_ImageGetAllPropertyItemsEx($hImage) Local $propsAr[UBound($ar,1)-1][5],$vec,$j=-1 For $i = 1 To $ar[0][0] If $ar[$i][3]<>0 Then ; pValue -- for Sony! $j += 1 $propsAr[$j][0] = $ar[$i][0] ; id $propsAr[$j][1] = $ar[$i][1] ; length $propsAr[$j][2] =$ar[$i][2]; type $vec = _GDIPlus_ImageGetPropertyItemValue($ar[$i][1],$ar[$i][2],$ar[$i][3]) $propsAr[$j][3] = $vec[0] ; val1 Switch $ar[$i][2] Case 5,10 ; $GDIP_PROPERTYTAGTYPEURATIONAL,$GDIP_PROPERTYTAGTYPESRATIONAL $propsAr[$j][4] = $vec[1] Case Else $propsAr[$j][4] = '' EndSwitch EndIf Next ReDim $propsAr[$j+1][5] For $i = 0 To UBound($propsAr,1)-1 Switch $propsAr[$i][2] ; type Case 5,10 ; $GDIP_PROPERTYTAGTYPEURATIONAL,$GDIP_PROPERTYTAGTYPESRATIONAL _GDIPlus_ImageSetPropertyItemEx($hImage,$propsAr[$i][0],$propsAr[$i][1], _ $propsAr[$i][2],$propsAr[$i][3],$propsAr[$i][4]) Case Else _GDIPlus_ImageSetPropertyItemEx($hImage,$propsAr[$i][0],$propsAr[$i][1], _ $propsAr[$i][2],$propsAr[$i][3]) EndSwitch Next _GDIPlus_ImageSaveToFile($hImage,'H:\b\1.jpg') _GDIPlus_ImageDispose($hImage) _GDIPlus_Shutdown() EndFunc Func _GDIPlus_ImageGetAllPropertyItemsEx($hImage) Local $iI, $iCount, $tBuffer, $pBuffer, $iBuffer, $tPropertyItem, $aSize, $aPropertyItems[1][1], $aResult $aSize = _GDIPlus_ImageGetPropertySize($hImage) If @error Then Return SetError(@error, @extended, -1) $iBuffer = $aSize[0] $tBuffer = DllStructCreate("byte[" & $iBuffer & "]") $pBuffer = DllStructGetPtr($tBuffer) $iCount = $aSize[1] $aResult = DllCall($__g_hGDIPDll, "uint", "GdipGetAllPropertyItems", "hwnd", $hImage, "uint", $iBuffer, "uint", $iCount, "ptr", $pBuffer) If @error Then Return SetError(@error, @extended, -1) If $aResult[0] Then Return SetError(10, $aResult[0], False) ReDim $aPropertyItems[$iCount + 1][4] $aPropertyItems[0][0] = $iCount For $iI = 1 To $iCount $tPropertyItem = DllStructCreate($tagGDIPPROPERTYITEM, $pBuffer) $aPropertyItems[$iI][0] = DllStructGetData($tPropertyItem, "id") $aPropertyItems[$iI][1] = DllStructGetData($tPropertyItem, "length") $aPropertyItems[$iI][2] = DllStructGetData($tPropertyItem, "type") $aPropertyItems[$iI][3] = DllStructGetData($tPropertyItem, "pvalue") $pBuffer += DllStructGetSize($tPropertyItem) Next Return $aPropertyItems EndFunc Func _GDIPlus_ImageGetPropertyItemValue($iLength, $iType, $pValue) Static Local $tvalue Switch $iType Case 1,6 ; $GDIP_PROPERTYTAGTYPEUBYTE,$GDIP_PROPERTYTAGTYPESBYTE $tvalue = DllStructCreate('byte val',$pValue) Case 2 ; $GDIP_PROPERTYTAGTYPEASCII $tvalue = DllStructCreate('char val['&$iLength&']',$pValue) Case 3 ; $GDIP_PROPERTYTAGTYPEUSHORT $tvalue = DllStructCreate('ushort val',$pValue) Case 4 ; $GDIP_PROPERTYTAGTYPEULONG $tvalue = DllStructCreate('ulong val',$pValue) Case 5 ; $GDIP_PROPERTYTAGTYPEURATIONAL $tvalue = DllStructCreate('ulong val1;ulong val2',$pValue) Case 7 ; $GDIP_PROPERTYTAGTYPEUNDEFINED ; undefined, per specification, but may be a long but is sometimes a string $tvalue = DllStructCreate('byte val['&$ilength&']',$pValue) ; see _GDIPlus_ImageSetPropertyItemEx ;~ $tvalue = DllStructCreate('char val['&$ilength&']',$pValue) Case 8 ; $GDIP_PROPERTYTAGTYPESSHORT $tvalue = DllStructCreate('short val',$pValue) Case 9 ; $GDIP_PROPERTYTAGTYPEULONG $tvalue = DllStructCreate('ulong val',$pValue) Case 10 ; $GDIP_PROPERTYTAGTYPESRATIONAL $tvalue = DllStructCreate('ulong val1;ulong val2',$pValue) Case 11 ; $GDIP_PROPERTYTAGTYPESFLOAT $tvalue = DllStructCreate('float val',$pValue) Case 12 ; $GDIP_PROPERTYTAGTYPEDFLOAT $tvalue = DllStructCreate('double val',$pValue) EndSwitch If @error Then Return SetError(@error,0,-1) Switch $iType Case 5,10 ; $GDIP_PROPERTYTAGTYPEURATIONAL,$GDIP_PROPERTYTAGTYPESRATIONAL Local $aRet[2] $aRet[0] = DllStructGetData($tvalue,'val1') $aRet[1] = DllStructGetData($tvalue,'val2') Case Else Local $aRet[1] $aRet[0] = DllStructGetData($tvalue,'val') EndSwitch Return $aRet EndFunc Func _GDIPlus_ImageGetPropertySize($hImage) Local $aSize[2], $aResult $aResult = DllCall($__g_hGDIPDll, "uint", "GdipGetPropertySize", "hwnd", $hImage, "uint*", 0, "uint*", 0) If @error Then Return SetError(@error, @extended, -1) $aSize[0] = $aResult[2] $aSize[1] = $aResult[3] Return $aSize EndFunc ;==>_GDIPlus_ImageGetPropertySize Func _GDIPlus_ImageSetPropertyItemEx($hImage,$id,$iLength,$iType,$value1,$value2=-1) Local $tProp = DllStructCreate($tagGDIPPROPERTYITEM) DllStructSetData($tProp,'id',$id) DllStructSetData($tProp,'type',$itype) DllStructSetData($tProp,'length',$ilength) Local $tag Switch $iType Case $GDIP_PROPERTYTAGTYPEUBYTE,$GDIP_PROPERTYTAGTYPESBYTE $tag = 'byte val' Case $GDIP_PROPERTYTAGTYPEASCII $tag = 'char val['&$iLength&']' Case $GDIP_PROPERTYTAGTYPEUSHORT $tag = 'ushort val' Case $GDIP_PROPERTYTAGTYPEULONG $tag = 'ulong val' Case $GDIP_PROPERTYTAGTYPEURATIONAL $tag = 'ulong val1;ulong val2' Case $GDIP_PROPERTYTAGTYPEUNDEFINED ; undefined, per specification, but may be a long but is sometimes a string $tag = 'byte val['&$iLength&']' ; causes saving to jpeg to write junk ;~ $tag = 'char val['&$iLength&']' Case $GDIP_PROPERTYTAGTYPESSHORT $tag = 'short val' Case $GDIP_PROPERTYTAGTYPEULONG $tag = 'ulong val' Case $GDIP_PROPERTYTAGTYPESRATIONAL $tag = 'long val1;long val2' Case $GDIP_PROPERTYTAGTYPESFLOAT $tag = 'float val' Case $GDIP_PROPERTYTAGTYPEDFLOAT $tag = 'double val' EndSwitch Static Local $tvalue = DllStructCreate($tag) Switch $iType Case $GDIP_PROPERTYTAGTYPEURATIONAL,$GDIP_PROPERTYTAGTYPESRATIONAL DllStructSetData($tvalue,'val1',$value1) DllStructSetData($tvalue,'val2',$value2) Case Else DllStructSetData($tvalue,1,$value1) EndSwitch DllStructSetData($tProp,'pvalue',DllStructGetPtr($tvalue)) Local $aResult = DllCall($__g_hGDIPDll, "int", "GdipSetPropertyItem", "hwnd", $hImage, "ptr", _ DllStructGetPtr($tProp)) If @error Then Return SetError(@error, @extended, -1) If $aResult[0] Then Return SetError(10, $aResult[0], -1) Return $aResult[0] = 0 EndFunc I have seen $iLength be as much as 37 KB for $GDIP_PROPERTYTAGTYPEUNDEFINED.
      Is there is a bug, how can this be demonstrated to the developers in a few lines of code (without clobbering Windows)?
       
    • c.haslam
      By c.haslam
      UEZ has kindly provided me with code that rotates an image per a line: see here
      Because I want to trim a photograph after rotation, I need to crop the photo. I wrote code which calls _GDIPlus_GraphicsSetClipRect() to do this, but it places spurious stuff in the corners: see 2.jpg attached.
      I want only the trimmed photo to show.
      The original jpeg is also attached.
      The arguments to _GDIPlus_GraphicsSetClipRect() come from solving 2 simultaneous equations: if a and b are the width and height of the original photo, find x and y, the width and height of the rotated and cropped rectangle;
      a = x cos(ang) + y sin(ang)
      b = x sin(ang) + y cos(ang)
      My solution is:
      x = (b * sin(ang) - a*cos(ang)) / (sin(ang)^2 - (cos(ang)^2)
      y = (b * cos(ang) - a * sin(ang)) / (cos(ang)^2 - sin(ang)^2)
      To try to get a handle on the problem, I have temporarily added in several lines in Case $btn. In 2.jpg, you can see that the rectangle bounding the area to be retained is in the wrong place.
      The code is:
      #include <ButtonConstants.au3> #include <GDIPlus.au3> #include <GUIConstantsEx.au3> #include <StaticConstants.au3> #include <WindowsConstants.au3> Opt('MustDeclareVars',1) Global Const $MK_SHIFT = 0x4 Global Const $MK_CONTROL = 0x8 Global Const $fPi = ACos(-1), $fPi2 = $fPi / 2, $fRad = 180 / $fPi GUIRegisterMsg($WM_MOUSEWHEEL, "WM_MOUSEWHEEL") GUIRegisterMsg($WM_PAINT,'WM_PAINT') Global $gX0=10,$gX1=580,$gY0,$gY1,$gForm1,$glblPic,$iLW,$iLH,$iW,$iH Global $ghCanvas,$ghImage,$ghPen,$gGraphicPic,$ghBitmap,$ghMatrix,$ghImageClone,$ghGfxClone Global Const $kDegToRads = 3.14159/180 main() Func main() $gForm1 = GUICreate("Form1", 623, 601, 192, 114) $iLW = 589 $iLH = 500 $glblPic = GUICtrlCreateLabel("", 8, 8, $iLW, $iLH) Local $btn = GUICtrlCreateButton("Rotate", 472, 560, 65, 25) GUISetState(@SW_SHOW) Local $oldY0,$oldY1,$fAngle _GDIPlus_Startup() $ghPen = _GDIPlus_PenCreate(0xFF999999,2) $ghImage = _GDIPlus_ImageLoadFromFile('H:\b\pergola.jpg') Local $h = GUICtrlGetHandle($glblPic) $gGraphicPic = _GDIPlus_GraphicsCreateFromHWND($h) $gY0 = 400 $gY1 = 400 $iW = _GDIPlus_ImageGetWidth($ghImage) $iH = _GDIPlus_ImageGetHeight($ghImage) $ghBitmap = _GDIPlus_BitmapCreateFromScan0($iW, $iH) $ghCanvas = _GDIPlus_ImageGetGraphicsContext($ghBitmap) $ghMatrix = _GDIPlus_MatrixCreate() ; Loop until the user exits. While True If $gY0<>$oldY0 Or $gY1<>$oldY1 Then Paint() $oldY0 = $gY0 $oldY1 = $gY1 Else Switch GUIGetMsg() Case $GUI_EVENT_CLOSE ExitLoop Case $btn $ghImageClone=_GDIPlus_BitmapCreateFromScan0($iW, $iH) $ghGfxClone=_GDIPlus_ImageGetGraphicsContext($ghImageClone) _GDIPlus_MatrixTranslate($ghMatrix, $iW/2, $iH/2) $gY1 = 300 ; temp Local $ang = -Angle($gY1-$gY0, $gX1-$gX0) _GDIPlus_MatrixRotate($ghMatrix, $ang) ;~ _GDIPlus_MatrixRotate($ghMatrix, -Angle($gY1-$gY0, $gX1-$gX0)) _GDIPlus_MatrixTranslate($ghMatrix, -$iW/2, -$iH/2) _GDIPlus_GraphicsSetTransform($ghGfxClone, $ghMatrix) _GDIPlus_GraphicsDrawImageRect($ghGfxClone,$ghImage,0,0,$iW,$iH) Local $angRads = $ang*$kDegToRads Local $sinAng = Sin($angRads) Local $cosAng = Cos($angRads) Local $wid = ($iLH*$sinAng-$iLW*$cosAng)/($sinAng^2-$cosAng^2) Local $left = ($iLW-$wid)/2 Local $ht = ($iLH*$cosAng-$iLW*$sinAng)/($cosAng^2-$sinAng^2) Local $top = ($iLH-$ht)/2 _GDIPlus_GraphicsDrawRect($ghGfxClone,$left,$top,$wid,$ht,$ghPen) ; temp _GDIPlus_GraphicsSetClipRect($ghGfxClone,$left,$top,$wid,$ht,0) _GDIPlus_GraphicsDispose($ghGfxClone) $ghGfxClone=_GDIPlus_ImageGetGraphicsContext($ghImage) _GDIPlus_GraphicsClear($ghImage) _GDIPlus_GraphicsDrawImageRect($ghGfxClone,$ghImageClone,0,0,$iW,$iH) _GDIPlus_GraphicsDispose($ghGfxClone) _GDIPlus_ImageDispose($ghImageClone) $gy0 = 400 $gy1 = 400 Paint() _GDIPlus_ImageSaveToFile($ghImage,'H:\b\2.jpg') ; added - is rotated, with same size as original file EndSwitch EndIf WEnd ; Clean up resources _GDIPlus_MatrixDispose($ghMatrix) _GDIPlus_ImageDispose($ghCanvas) _GDIPlus_ImageDispose($ghImage) _GDIPlus_ImageDispose($ghBitmap) _GDIPlus_PenDispose($ghPen) _GDIPlus_GraphicsDispose($gGraphicPic) _GDIPlus_Shutdown() EndFunc Func WM_MOUSEWHEEL($hWnd, $iMsg, $wParam, $lParam) #forceref $hWnd, $iMsg, $wParam, $lParam Local Const $kYmax=$iLH-1,$kDelta=2 Local $vec = GUIGetCursorInfo($gForm1) If $vec[4] = $vec[4]=$glblPic Then Local $iDelta = BitShift($wParam, 16) ; positive = up Local $iKeys = _WinAPI_LoWord($wParam) If BitAND($iKeys,$MK_CONTROL)=$MK_CONTROL Then If BitAND($iKeys,$MK_SHIFT)=$MK_SHIFT Then ; do nothing Else If $iDelta > 0 And $gY0>3 Then $gY0 -= $kDelta If $iDelta < 0 And $gY0<$kYmax Then $gY0 += $kDelta EndIf Else If BitAND($iKeys,$MK_SHIFT)=$MK_SHIFT Then If $iDelta > 0 And $gY1>3 Then $gY1 -= $kDelta If $iDelta < 0 And $gY1<$kYmax Then $gY1 += $kDelta Else If $iDelta > 0 And $gY0>3 Then $gY0 -= $kDelta If $iDelta < 0 And $gY0<$kYmax Then $gY0 += $kDelta If $iDelta > 0 And $gY1>3 Then $gY1 -= $kDelta If $iDelta < 0 And $gY1<$kYmax Then $gY1 += $kDelta EndIf EndIf EndIf Return $GUI_RUNDEFMSG EndFunc ;==>WM_MOUSEWHEEL Func Paint() _GDIPlus_GraphicsClear($ghCanvas,0) _GDIPlus_GraphicsDrawImageRect($ghCanvas, $ghImage, 0,0, $iLW, $iLH) _GDIPlus_GraphicsDrawLine($ghCanvas, $gX0, $gY0, $gX1, $gY1, $ghPen) _GDIPlus_GraphicsDrawImageRect($gGraphicPic, $ghBitmap, 0, 0, $iW, $iH) EndFunc Func WM_PAINT() _WinAPI_RedrawWindow($gForm1, 0, 0, $RDW_UPDATENOW) Paint() _WinAPI_RedrawWindow($gForm1, 0, 0, $RDW_VALIDATE) EndFunc Func Angle($y, $x) ;return value is in degree Local Const $fPi = ACos(-1), $fPi2 = ACos(-1) / 2, $fRad = 180 / $fPi Switch True Case ($x > 0) Return ATan($y / $x) * $fRad Case ($x < 0 And $y >= 0) Return ATan($y / $x + $fPi) * $fRad Case ($x < 0 And $y < 0) Return ATan($y / $x - $fPi) * $fRad Case ($x = 0 And $y > 0) Return $fPi2 * $fRad Case ($x = 0 And $y < 0) Return -$fPi2 * $fRad Case ($x = 0 And $y = 0) Return 0 EndSwitch EndFunc I also don't understand how the rotated picture gets displayed. There are graphics objects, graphics contexts and PDI+ bitmaps. How are they related?
      Help would be much appreciated.