Jump to content
Sign in to follow this  
Chance

Encode image in memory without saving to file [Save image to stream]

Recommended Posts

Chance

_GDIPlus_Startup()
$hImage = _GDIPlus_BitmapCreateFromScan0($iWidth, $iHeight)
$hGraphic = _GDIPlus_ImageGetGraphicsContext($hImage)
$hBrush = _GDIPlus_BrushCreateSolid(0xFF000000)
_GDIPlus_GraphicsFillRect($hGraphic, 0, 0, $iWidth, $iHeight, $hBrush)
$hFormat = _GDIPlus_StringFormatCreate()
$hFamily = _GDIPlus_FontFamilyCreate("OCR A Extended")
$hFont = _GDIPlus_FontCreate($hFamily, $FontSize, 0)
$tLayout = _GDIPlus_RectFCreate(10, 10, 0, 0)
$aInfo = _GDIPlus_GraphicsMeasureString($hGraphic, $sString, $hFont, $tLayout, $hFormat)
$hBrush = _GDIPlus_BrushCreateSolid(0xFF37FF00)
_GDIPlus_GraphicsDrawStringEx($hGraphic, $sString, $hFont, $aInfo[0], $hFormat, $hBrush)
$hBitmap = _GDIPlus_BitmapCreateHBITMAPFromBitmap($hImage)
_WinAPI_DeleteObject($hBitmap)
_GDIPlus_FontDispose($hFont)
_GDIPlus_FontFamilyDispose($hFamily)
_GDIPlus_StringFormatDispose($hFormat)
_GDIPlus_BrushDispose($hBrush)
_GDIPlus_GraphicsDispose($hGraphic)
_GDIPlus_GraphicsDispose($hGraphic)
$TempImg = _TempFile(@ScriptDir, "", ".png")
_GDIPlus_ImageSaveToFile($hImage, $TempImg)
$NewImage = FileRead($TempImage)

I'd like to get rid of this

 

$TempImg = _TempFile(@ScriptDir, "", ".png")
_GDIPlus_ImageSaveToFile($hImage, $TempImg)
$NewImage = FileRead($TempImage)

For example, I'm looking to encode the image object from bmp (as I think it is) to PNG, jpg, jpeg, tiff etc without actually having to save the image to the hard drive and then re-reading it to memory.

I've failed to locate anything like this on the forums...

Edited by FlutterShy

Share this post


Link to post
Share on other sites
Chance

Select what you want to get rid of, and hit the delete key.

use $hImage however you see fit.

Ok.

My point is I'd like to figure out how to convert an image in memory from bmp to Jpg, png or gif, any would work fine, so far I only know how to do it by saving the file.

On a side note, the other day you asked why you haven't become an MVP, maybe look at some of your posts to get some insight.

Edited by FlutterShy

Share this post


Link to post
Share on other sites
Chance

What have you "figured out" so far?

I've been looking at some C++ function that did this by saving an image to a stream and doing it in memory, lead me to a post by the one and only UEZ, modified the function I found and surprisingly enough, it's exactly what I needed.

Func _GDIPlus_SaveImageToStream($hBitmap, $iQuality = 50, $Encoder = "jpg") ;coded by Andreik, modified by UEZ, FS
    Local $tParams
    Local $tData
    Local $pData
    Local $pParams

    Local $sImgCLSID = _GDIPlus_EncodersGetCLSID($Encoder)
    Local $tGUID = _WinAPI_GUIDFromString($sImgCLSID)
    Local $pEncoder = DllStructGetPtr($tGUID)

    If $Encoder == "jpg" Or $Encoder == "jpeg" Then
        $tParams = _GDIPlus_ParamInit(1)
        $tData = DllStructCreate("int Quality")
        DllStructSetData($tData, "Quality", $iQuality) ;quality 0-100
        $pData = DllStructGetPtr($tData)
        _GDIPlus_ParamAdd($tParams, $GDIP_EPGQUALITY, 1, $GDIP_EPTLONG, $pData)
        $pParams = DllStructGetPtr($tParams)
    Else
        $pParams = 0
    EndIf

    Local $hStream = DllCall("ole32.dll", "uint", "CreateStreamOnHGlobal", "ptr", 0, "bool", True, "ptr*", 0)
    If @error Then Return SetError(1, 0, 0)
    $hStream = $hStream[3]
    DllCall($ghGDIPDll, "uint", "GdipSaveImageToStream", "ptr", $hBitmap, "ptr", $hStream, "ptr", $pEncoder, "ptr", $pParams)
    _GDIPlus_BitmapDispose($hBitmap)
    Local $hMemory = DllCall("ole32.dll", "uint", "GetHGlobalFromStream", "ptr", $hStream, "ptr*", 0)
    If @error Then Return SetError(2, 0, 0)

    $hMemory = $hMemory[2]
    Local $iMemSize = _MemGlobalSize($hMemory)
    Local $pMem = _MemGlobalLock($hMemory)

    $tData = DllStructCreate("byte[" & $iMemSize & "]", $pMem)
    Local $bData = DllStructGetData($tData, 1)
    Local $tVARIANT = DllStructCreate("word vt;word r1;word r2;word r3;ptr data;ptr")

    DllCall("oleaut32.dll", "long", "DispCallFunc", "ptr", $hStream, "dword", 8 + 8 * @AutoItX64, "dword", 4, "dword", 23, "dword", 0, "ptr", 0, "ptr", 0, "ptr", DllStructGetPtr($tVARIANT)) ;http://msdn.microsoft.com/en-us/library/windows/desktop/ms221473(v=vs.85).aspx
    _MemGlobalFree($hMemory)

    Return $bData
EndFunc   ;==>_GDIPlus_SaveImageToStream

P.S. Thanks for the "help".

Edited by FlutterShy

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

  • Similar Content

    • Xandy
      By Xandy
      MapIt is a tile world editor.  MapIt was built around the concept of reversing Dragon Warrior map images.  MapIt can take image input and produce a tile and world array.
      MapIt features Unity style dragable labels that adjust property values.

      MapParser is a C++ project that scans images for unique tiles.  MapParser is very fast.  Due to hard drive failure, many bugs were restored b/c I had to rewind many years.  Frustrated with the design, I wrote a new version from the ground up.  This New Version:  AutoIt Front-end, command line controls, and shared with the world; so that I can't lose it again.
      You can toggle the C++ MapParser off to see the difference in speeds between the MapParser CPP verse AutoIt function.  Function is named Scan_Tiles() in AutoIt.  You can also chose to download without MapParser.exe.
      At the moment Scanning a image resets the arrays, but you can add tiles after scanning.
      Images can be added as tiles without scan image at all.  Then configure settings to give your world parameters and manually fill the world data with tile indexes.
      Using the settings you can change tile size after a scan.  Example: you wanted to replace a map with different sized tiles.
      Changing and replacing tile / world data is easy.  B/c tile world editor.

      Hotkeys, I use CTRL+R in image above to signal replace tile action and I use "G" to Get the tile under mouse.
      Hotkeys are not saved to disk and thus are set to default between sessions.
      I might draw the world to pre-rendered surfaces and use them as multi-layer someday.  I do that in my AutoIt, DragonWarrior Remake but I could spend forever unsure what features are important for this.  The DW_Remake has a method of replacing a tile with a tile on two layers.  So you could replace a tree on the first layer with a grass, and a tree in the second layer.  This is all getting very confusing.
      I attempted to write the good code.  If something could be better, please advise.
      Fifth release.  Enjoy.
      For download, videos, and example of created world file data; please visit the MapIt webpage: http://songersoft.com/programming/mapit/mapit_about.phtml
      Special thanks: @AdmiralAlkex, @Melba23, @MrCreatoR
      Main AutoIt source file: Will not run without other Includes and SDL DLLs.
      Last Update: 5/26/2018 3:45 PM EST
      REMOVED CODE BLOCK:  I was informed the this page loaded very slowly, one solution so far has been to remove the 2k lines in the code block.
      When I recieve more feedback from the User I may reduce image size or remove images.
      Next Version Added: $eSETTING_TILE_LAST_PATH I have the weekend, I want to write world layers with aBoard surfaces.  
    • DynamicRookie
      By DynamicRookie
      Hey there!
       
      I've been developing a artificial intelligence.

      My first hard task was letting the A.I know when a sentence is found in memory with different words
      What i tried to do here is simply, get all the words in user sentence that could be used
      as a identifier
              
              example: Steve Jobs
              
              then identify the sentence purpose with the words we found in the past "for" loop
              
              example: Do/Know/You/Who/Steve/Jobs
              
              Compare the example in the following matching sentences in memory.
              
              1-Steve jobs was a known person
              2-Do you know who barack obama is?
              3-Do you know Steve jobs?
              4-Do you know who steve jobs is?
              5-How much money steve jobs had
              
              Then find the sentence that has way more matches than the other ones, remember that if the identifier words were not found
              (Steve jobs) then the sentence is invalid.
              
              Every sentence has a different answer and is important that the right one is chosen.
              
      If there's no more than the half of words in matches, then assign a variable the result of function, such as a return but for a global var.
      I couldn't figure out how to do that with StringRegExp.
       
      I honestly need help with detecting identifiers on memory sentences.
      I would also like to let the AI know typos, meaning that moeny and money means the same thing.
      Any help is hugely appreciated.

       
    • lenclstr746
      By lenclstr746
      HELLO GUYS
      I'm a work on a background see and click bot project 
      I can complete it if your help me
      (using imagesearch , gdi+ and  fastfind)
    • Jefrey
      By Jefrey
      Needed a way to store global temporary & permanent information and came up with this.
      This is inspired by NodeJS's store and store2 packages, as well as W3 specs' localStorage and sessionStorage, offering multiple ways of usage.
      This is not related to any browser's storage, nor will allow you to access or modify browsers storage - although this is possible and not a hard task, this is not what this UDF is intended to do.
      This UDF offers functions for temporary storage (that gets cleaned up once the application is shutdown) that is kept on memory using ScriptingDictionary, as well as for permanent storage, that is saved on the harddisk as an encrypted file.
      sessionStorage (temporary storage)
      It's useful to keep application state and temporary settings accessible by any part of your script (although it could also be done with a global variable, I still prefer this method).
      You have multiple ways, at your choice, to:
      ; add or modify a key sessionStorage("foo", "bar") store("foo", "bar") sessionStorage_set("foo", "bar") sessionStorage_setItem("foo", "bar") ; read a key (returns false if key does not exist) $read = sessionStorage("foo") $read = store("foo") $read = sessionStorage_get("foo") $read = sessionStorage_getItem("foo") ; delete a key sessionStorage_remove("foo") ; delete all keys sessionStorage_clear() sessionStorage_clearAll() localStorage (permanent storage)
      It's useful to store user-defined settings.
      ; initialize ; this is optional, but allows you to control ; how things are going to be saved localStorage_startup([file where you want the settings to be saved], [crypt password]) ; by default, if not supplied, if supplied the "Default" keyword (or if you dont initialize), ; the file will be a random-named file (based on @ScriptFullPath) at user's %APPDATA% ; and the password will also be based on @ScriptFullPath ; you can set only the crypt password if you want: ; localStorage_startup(Default, "mypassword") ; the usage is the same as sessionStorage ; add or modify a key localStorage("foo", "bar") store2("foo", "bar") ; notice the '2' localStorage_set("foo", "bar") localStorage_setItem("foo", "bar") ; read a key (returns false if key does not exist) $read = localStorage("foo") $read = store2("foo") $read = localStorage_get("foo") $read = localStorage_getItem("foo") ; delete a key localStorage_remove("foo") ; delete all keys localStorage_clear() localStorage_clearAll() Download
    • dadalt95
      By dadalt95
      I would like to know if it's possible to pass an image recognition (captcha) system.
       
      What are the ways to achieve this?
      Just the references or links is enough for me by now.
       
      Thanks by now!
       
      Thanks!
×