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RooperGee

Convert to grayscale and save

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RooperGee

Hello All!

I've been playing with GDI image manipulation functions and I'm doing great with rotating and resizing images, but I can't figure out how to make the help file's example script for grayscale conversion actually save the file (it only displays it to a GUI).  Can someone please enlighten me as to what needs to be modified in the code below to save it to an external file?  Thanks!!!

#include <GUIConstantsEx.au3>
#include <ScreenCapture.au3>

Example()

Func Example()
    _GDIPlus_Startup() ;initialize GDI+
    Local Const $iWidth = 600, $iHeight = 600

    Local $hGUI = GUICreate("GDI+ Example (" & @ScriptName & ")", $iWidth, $iHeight) ;create a test GUI
    GUISetState(@SW_SHOW)

    Local $hGraphics = _GDIPlus_GraphicsCreateFromHWND($hGUI) ;create a graphics object from a window handle
    Local $hIA = _GDIPlus_ImageAttributesCreate() ;create an ImageAttribute object

    Local $tColorMatrix = _GDIPlus_ColorMatrixCreateGrayScale() ;create greyscale color matrix

    _GDIPlus_ImageAttributesSetColorMatrix($hIA, 0, True, $tColorMatrix) ;set greyscale color matrix

    Local $hHBmp = _ScreenCapture_Capture("", 0, 0, $iWidth, $iHeight) ;create a GDI bitmap by capturing an area on desktop
    Local $hBitmap = _GDIPlus_BitmapCreateFromHBITMAP($hHBmp) ;convert GDI to GDI+ bitmap
    _WinAPI_DeleteObject($hHBmp) ;release GDI bitmap resource because not needed anymore

    _GDIPlus_GraphicsDrawImageRectRect($hGraphics, $hBitmap, 0, 0, $iWidth, $iHeight, 0, 0, $iWidth, $iHeight, $hIA) ;draw the bitmap while applying the color adjustment

    Do
    Until GUIGetMsg() = $GUI_EVENT_CLOSE

    ;cleanup GDI+ resources
    _GDIPlus_ImageAttributesDispose($hIA)
    _GDIPlus_GraphicsDispose($hGraphics)
    _GDIPlus_BitmapDispose($hBitmap)
    _GDIPlus_Shutdown()
    GUIDelete($hGUI)
EndFunc   ;==>Example

 


Progress lies not in enhancing what is, but in advancing towards what will be. - Kahlil Gibran

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RooperGee

Just took asking to spur me on to more searching.  Thanks to a post from Firefox I figured out all I had to do was something like this:

#include <GUIConstantsEx.au3>
#include <ScreenCapture.au3>

Example()

Func Example()
    _GDIPlus_Startup() ;initialize GDI+
    Local Const $iWidth = 600, $iHeight = 600

    Local $hIA = _GDIPlus_ImageAttributesCreate() ;create an ImageAttribute object

   ; Local $tColorMatrix = _GDIPlus_ColorMatrixCreateNegative() ;create negative color matrix
    Local $tColorMatrix = _GDIPlus_ColorMatrixCreateGrayScale() ;create grayscale color matrix


    _GDIPlus_ImageAttributesSetColorMatrix($hIA, 0, True, $tColorMatrix) ;set negative color matrix

    Local $hHBmp = _ScreenCapture_Capture("", 0, 0, $iWidth, $iHeight) ;create a GDI bitmap by capturing an area on desktop
    Local $hBitmap = _GDIPlus_BitmapCreateFromHBITMAP($hHBmp) ;convert GDI to GDI+ bitmap
    _WinAPI_DeleteObject($hHBmp) ;release GDI bitmap resource because not needed anymore

    Local $hGraphics = _GDIPlus_ImageGetGraphicsContext($hBitmap)

    _GDIPlus_GraphicsDrawImageRectRect($hGraphics, $hBitmap, 0, 0, $iWidth, $iHeight, 0, 0, $iWidth, $iHeight, $hIA) ;draw the bitmap while applying the color adjustment

    _GDIPlus_ImageSaveToFile($hBitmap, "test.jpg")

    ;cleanup GDI+ resources
    _GDIPlus_ImageAttributesDispose($hIA)
    _GDIPlus_GraphicsDispose($hGraphics)
    _GDIPlus_BitmapDispose($hBitmap)
    _GDIPlus_Shutdown()
EndFunc   ;==>Example

 

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Progress lies not in enhancing what is, but in advancing towards what will be. - Kahlil Gibran

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$__g_iBorder) / 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", 0, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", 0, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", ($iW - $__g_iBorder) / 2, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", ($iW - $__g_iBorder) / 2, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipFillRectangle", "handle", $hCanvas, "handle", $hBrush, "float", ($iW - $__g_iBorder) - 2, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) DllCall($__g_hGDIPDll, "int", "GdipDrawRectangle", "handle", $hCanvas, "handle", $hPen3, "float", ($iW - $__g_iBorder) - 2, "float", ($iH - $__g_iBorder) - 2, "float", $__g_iBorder + 1, "float", $__g_iBorder + 1) _WinAPI_BitBlt($hDC, 0, 0, $iW, $iH, $hDC_backbuffer, 0, 0, $SRCCOPY) $fOffset += 0.5 _GDIPlus_GraphicsDispose($hCanvas) _WinAPI_SelectObject($hDC_backbuffer, $DC_obj) _WinAPI_DeleteDC($hDC_backbuffer) _WinAPI_DeleteObject($hHBitmap) _WinAPI_ReleaseDC($__g_hGUI_MarkArea, $hDC) _GDIPlus_PenDispose($hPen) _GDIPlus_PenDispose($hPen2) _GDIPlus_PenDispose($hPen3) _GDIPlus_BrushDispose($hBrush) EndFunc ;==>PlayBorderAnim Func WM_ERASEBKGND($hWnd, $iMsgm, $wParam, $lParam) ;suppress repainting to avoid flickering but causes some other side effects #forceref $iMsgm, $wParam, $lParam Local Const $hBrush = _WinAPI_CreateSolidBrush(0xEFCDAB) ;BGR format ;~ _WinAPI_RedrawWindow($__g_hGUI_MarkArea, 0, 0, BitOR($RDW_NOERASE, $RDW_NOCHILDREN, $RDW_NOFRAME, $RDW_VALIDATE)) _WinAPI_SetClassLongEx($__g_hGUI_MarkArea, $GCL_HBRBACKGROUND, $hBrush) _WinAPI_DeleteObject($hBrush) Return 0 EndFunc ;==>WM_ERASEBKGND  
      Just press the lmb and move your mouse. When lmb is released you can adjust the size of the window by dragging the white rectangle to any direction. Rmb will move the marked area.
      Press ESC to get the coordinates of the marked region.
      If you have any improvements, please post it here.
       
      Tested on Win10 x64 only.
       
    • badcoder123
      By badcoder123
      I was looking around the help file and I came across _GDIPlus_GraphicsDrawRect and _WinAPI_DrawLine and I seem to be having the same "problem" where every time it draws into a window and you lose or gain focus it has to redraw itself. Is there anyway around this? 
      #include <WindowsConstants.au3> #include <WinAPI.au3> #Include <GDIPlus.au3> _GDIPlus_Startup() Run("notepad.exe") $hWnd = WinWait("Untitled") $hGraphic = _GDIPlus_GraphicsCreateFromHWND($hWnd) $Color = 0xFFFF0000 $hPen = _GDIPlus_PenCreate($Color, 2) For $i = 1 To 10 _GDIPlus_GraphicsDrawRect($hGraphic, 200, 200, 25 ,25, $hPen) ToolTip($i) Sleep(1000) Next _WinAPI_RedrawWindow($hWnd, 0, 0, $RDW_INVALIDATE + $RDW_ALLCHILDREN) _GDIPlus_GraphicsDispose($hGraphic) _GDIPlus_PenDispose($hPen) _GDIPlus_Shutdown()  
    • bhns
      By bhns
      try it for make flyers old games xml + Gdi, i belive many sources had lost 
      AIT-ADRLIST.au3

    • mdepot
      By mdepot
      I have a situation where I am repeatedly capturing a region of the screen and feeding it into Tesseract OCR.  Since the OCR is a relatively slow operation, I would like to create an in memory cache of the ocr results.  An ideal hash key for this cache would be a checksum of the captured image.  With this I could capture the region, checksum it, and then only if I don't get a cache hit I would write the image out to disk for external OCR.
      Now I know I can do this by saving the captured image out to disk, and then summing the disk file with _Crypt_HashFile().  But that's still slower than I would like, and it shouldn't be necessary.  Ideally, it should be possible to checksum the image data directly in memory so I don't have to go to disk at all.  In order to do that, I need a way to dump a representation of the image into a string  (or some equivalent).  Then I could use the _Crypt_HashData() function against that string to create my cache hash key.
      Googling around I found an article here that shows a way to convert an image object to a byte array using System.Drawing.  This was the closest thing I found to what I'm trying to do.  I don't know if that method could be used from within AutoIT, or if perhaps there may be a better way I don't know about.  If someone could give me a shove in the right direction it would be a big help.  Thanks!
    • UEZ
      By UEZ
      Here some graphical examples written completely in FreeBasic just for fun.  
      3D Starfield Rotating Flight 3D Starfield Scrolling v1 Booster 3D Starfield Scrolling v3 Booster CreateWindowEx (hGUI) Example FB File2Bas Code Generator (AutoIt script) FB GFX Examples Fire Particles FMOD Examples GDI - GDI+ 3D Sinus Wave GDI - GDI+ Animated Pythagoras Tree GDI - GDI+ Particles - Repulsive Force Sim v2.0 GDI - GDI+ Plasma v5 Booster GDI - GDI+ Random Pattern GDI - GDI+ Space Flight GDI - GDI+ Tunnel Flight - WipeOut Style GDI Classic Raytraced Tunnel GDI Elastic Twister Effect GDI Exploding Pixels GDI Infinite Image Zoom Flight GDI Liquid Pixels GDI Particle Repulsion Grid GDI Particles Mouse Attraction GDI Starfield GDI The Nautilus Raymarcher GDI Worm Tunnel Flight GDI+ Impossible Possible GDI+ Kaleidoscope GDI+ Performance Test - Au3 vs FB GDI+ Polar Clock GDI+ Rotating Earth GDI+ Star Wars Scroller GDI+ Streamer GDI+ Swiss Railway Clock Ini Read - Write Mandelbrot Plasma Puristic Clock Rutt_Etra_Izer_Booster Tunnel Flight uFMOD _WinAPI_SetWindowTitleIcon  
      Download: FreeBasic Examples build 2018-07-10.rar
       
      I will add new examples from time to time.
       
      FreeBasic source codes are also included.
       
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