Base64ToComByteArray() :: Include image in script and display it with WIA 2.0

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SKAN
Posts: 362
Joined: 29 Sep 2013, 16:58

Base64ToComByteArray() :: Include image in script and display it with WIA 2.0

21 Aug 2017, 16:51

The function:

Code: Select all

Base64ToComByteArray( ByRef B64 ) {  ; By SKAN / Created: 21-Aug-2017 / Topic: goo.gl/dyDxBN
Static CRYPT_STRING_BASE64 := 0x1
Local  Rqd := 0, BLen := StrLen(B64), ByteArray := ""  

  If DllCall( "Crypt32.dll\CryptStringToBinary", "Str",B64, "UInt",BLen, "UInt",CRYPT_STRING_BASE64
              , "UInt",0, "UIntP",Rqd, "Int",0, "Int",0 )
  {
     ByteArray := ComObjArray( 0x11, Rqd ) 
     DllCall( "Crypt32.dll\CryptStringToBinary", "Str",B64, "UInt",BLen, "UInt",CRYPT_STRING_BASE64
         , "Ptr",NumGet( ComObjValue( ByteArray ) + 8 + A_PtrSize ), "UIntP",Rqd, "Int",0, "Int",0 )
  }

Return ByteArray
}
Pseudocode

Code: Select all

Base64ImageData := "//////////////"
ByteArray := Base64ToComByteArray( Base64ImageData )
If IsObject( ByteArray )
; do something
Demo: Include image in script and display it with WIA 2.0

Code: Select all

#NoEnv
#Warn
#SingleInstance, Force


Base64ImageData := "
( LTrim Join
  iVBORw0KGgoAAAANSUhEUgAAAQAAAAEACAMAAABrrFhUAAAAz1BMVEX///8AAAD7/fwjdCv///+bwJ8SaBv///////9KjFBon26U
  u5j///////////////////////9Oj1VfmmX///////////////8NZRb4+PgJQw4MYBUJRw8MXRTP2dAKTBAJSBCguKJnf2nP1M+g
  raELWBNokmsLVBIKThEKUBEMWxMLUhILVhMJShDu8O7a4NotcTLk6eTE0cW4wrmUr5aHpolXh1uUopSGmIdWclhEfUgrVS3Ey8St
  wK6st614nHp3i3hCZES5ybosZDCUqpV0X6tXAAAAGHRSTlOzALL2jMz9TRXm3M6deVosJiHk35h1W1hTCYFzAAAIt0lEQVR42uzW
  SQrDMAxA0V/ZTpx5oCG6/0kLbkM6nSDSX2mrBwJxM54DnGOut164fHLf6vwHYI4YKs7fADvG2j8AlghIWkOll68KaxIgLm8AEUhB
  zRQSEE+AEaRVU7UC4wEwAcb2V22B6QUQIam5EsQnQAYxdP9HQSAXgBo6NVgHdQEYoFGDNTAUgB4MXoBqgL4ACBj4f36rQAoAoCYD
  HMABHMABHMABHMAB1GQO4AAO4AAO4AAP9up4N0EYiOP4a9yvIoJGZ9TRUi0xJM7o3v+dlu2PZTPAFbqDBfm8AM23d2UKMAWYAkwB
  pgD0lP4gQOnS+Et6NTSE8hR/uriSWgsP4DR+sBvqWxHjm3bUTnCAa44HcUG9SvFLfqU2AgOYOyo46o+xeGQN+QsLYDQq3eckhz9B
  XszIV1AAo1HjuJ5RLyyqZIX3DQQFsKh1PvRSIEW17H3n+f2QACfUy277OYnboM5q6zmDAQFMhgbHZC8+AyZHrbNngYAAJzS6JeJb
  cEG9PNruyENAAI1Gb2qxI1EFmiwjryXsHsCgmVaR8BLEzAV4jWD3ABswlOQI8AdYqWg7J1b3ACkYSxW9SI5AzF5AsiaWaADFXAEj
  dAK9dlAygOwOWDaA1w7IBnhdk5QSfAC1GDpAIhfgAoYeeYAMjOO4AzhwzuMOYMG5KaUGfwTFAhhwcvUffoNiARx8noDkMNoAH+za
  62qDQBCG4dvY2YZtjMmY5lQNGmlAQ+//poot/b1fhMm4h/cGxEcY9uAVGgFnYBkSKAB5+7LWqu8FxAAe5A0dAYIAVg5gIF/l7wiI
  FsABMxBciEsCyO0FyNsWXQYJAxyMRDfy1k97QX0A7Bvg4TNwg87A+QBOD6DAAKrEAdanaAEcCGCAYgbYGSA5gFIV4Dt1AJsBFgGw
  1wLAV2GiAKuPNyORI/BIGChIAPJWZgB9gFETYJwGkDLAVhQAeLg0wGXJAD388PkABAAcZQDA3fACACpNgCpagBo6FF+fogVg8mbh
  3XDEADuDJAew0QTAtwLxArwnD4Ctg0QB1qfUAXYGLECAmx5AARwHyAPwkgHKDJAB7D5xgJU6gNUEwI8DMoAkwFkGwIUDcDBocQI8
  cTMWHsBjyQDjXIAwfhHyA2wzQNQADQRwjBeAIIAqAxgkMYBSE6BPHWCTAfQBRrFfhBj8TVIaQOV2/M7MLQhggEIAqJm7org61xAc
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  w6meRYwbwLY0BTBaAKoAFIACCAYHEFO6Y4wdXDcD7hMdBgCl72ztuvqPuKMASChjVd2NmEW6AeARpBSVZ+7xrGzHWS7tIJiHoc9t
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  AFOR/9Hfs8b9/bv0atC1KoIAfjcByos9v1B69KP0gQKkZxe741TXej3hewVwajPj1+7/F3t1m/tZet8AJrAZn12c8RdKHxxAenHG
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  CScxMsAE1j5aJrK/N/jGW44jAcAfyaEAwNejGTLAlgewQflDCH4RHnEeCsMPNNWxP7T0h7NBo2ofLyveVnWEJ0LwIYjz+mR5rEw5
  tyD04/W38W3/8pcp1DxzBsDEPll6Fd94IFo9kELNU3K1/o2uI+wSAwus9TLBQsPO6Vb9Zoh+jpC2TS417+plloU/evaXhoDmn/XD
  B+B+AM34e9aD97yuHz8fL2f+mV7GtGfgDggAaMbHOiF1kiz/ar6qHz/WR9bowPqrA0GL+kUANGMxz13GKKWMHY66ftY8dowoyA/f
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  AV6AaxSmZrAJtAN8wTWDOZg7QIXcDJahdoAIpRmsQOwACdTgDjiF1AHEQ2jmCuDlBliBTzPWB1g7wNUJejRTHQqnPADigWDoDrgA
  eBkAuwe0ZGfgI5pcLgr4fQBcLRhrkTtE7jaPofwmA+ApxTorf5/ONSaRAWA88wA/FYbIdxzaJjsAAAAASUVORK5CYII=
)"

VectorImage := ComObjCreate( "WIA.Vector" )
VectorImage.BinaryData := Base64ToComByteArray( Base64ImageData ) 
Picture := VectorImage.Picture
VectorImage := "" 
Base64ImageData := ""
hBM := Picture.Handle 

Gui, Add, Picture,, HBITMAP:%hBM%
Gui, Show
Return ;    // end of auto-execcute section //


Base64ToComByteArray( ByRef B64 ) {  ; By SKAN / Created: 21-Aug-2017 / Topic: goo.gl/dyDxBN 
Static CRYPT_STRING_BASE64 := 0x1
Local  Rqd := 0, BLen := StrLen(B64), ByteArray := ""  

  If DllCall( "Crypt32.dll\CryptStringToBinary", "Str",B64, "UInt",BLen, "UInt",CRYPT_STRING_BASE64
              , "UInt",0, "UIntP",Rqd, "Int",0, "Int",0 )
  {
     ByteArray := ComObjArray( 0x11, Rqd ) 
     DllCall( "Crypt32.dll\CryptStringToBinary", "Str",B64, "UInt",BLen, "UInt",CRYPT_STRING_BASE64
         , "Ptr",NumGet( ComObjValue( ByteArray ) + 8 + A_PtrSize ), "UIntP",Rqd, "Int",0, "Int",0 )
  }

Return ByteArray
}

Other Links:
Scripts and Functions: WIA - Windows Image Acquisition (1.0.02.00 - 2015-05-03) by just me
Scripts and Functions: Base64 encoder/decoder for Binary data by SKAN
Other Utilities & Resources: WIA 2.0 for Windows XP (Windows Image Acquisition Automation Layer)
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joedf
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Re: Base64ToComByteArray() :: Include image in script and display it with WIA 2.0

21 Aug 2017, 19:09

Hey skan!
I've bin trying to decode base64 encoded jpg files to the original binary data. But somehow the base64 decode based on crypt dll posted elsewhere was returning blank data. Do you think this could be related to running the ansi version instead of the u32 version? I haven't tried. I ended up using C for this.

Edit: Whoops! Looks like you posted a rewrite the day after my attempt :b
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SKAN
Posts: 362
Joined: 29 Sep 2013, 16:58

Re: Base64ToComByteArray() :: Include image in script and display it with WIA 2.0

24 Aug 2017, 04:23

joedf wrote:Edit: Whoops! Looks like you posted a rewrite the day after my attempt :b
HI joedf.
Is the rewrite working properly for you?
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joedf
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Re: Base64ToComByteArray() :: Include image in script and display it with WIA 2.0

24 Aug 2017, 08:53

Just tested it (https://autohotkey.com/boards/viewtopic.php?t=35964). Works Flawlessly! :+1:
Very nice! :dance:
However, I am a little puzzled by this line here (in Base64Dec):
VarSetCapacity( Bin, 128 ), VarSetCapacity( Bin, 0 ), VarSetCapacity( Bin, Rqd, 0 )
Reading further in the docs, it seems this line is to force free the memory including unicode builds (128bytes). This is to ensure that you have a "clean" variable.
Am I correct with this assumption? :think:
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Windows 10 x64 Professional, Intel i5-8500 @ 3.00 GHz, 16GB DDR4 3200 MHz, NVIDIA GTX 1060 6GB | [About Me] | [ASPDM - StdLib Distribution]
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User avatar
SKAN
Posts: 362
Joined: 29 Sep 2013, 16:58

Re: Base64ToComByteArray() :: Include image in script and display it with WIA 2.0

24 Aug 2017, 09:24

joedf wrote:Just tested it (https://autohotkey.com/boards/viewtopic.php?t=35964). Works Flawlessly! :+1:
Very nice! :dance:
Thanks :)
joedf wrote:However, I am a little puzzled by this line here (in Base64Dec):
VarSetCapacity( Bin, 128 ), VarSetCapacity( Bin, 0 ), VarSetCapacity( Bin, Rqd, 0 )
Reading further in the docs, it seems this line is to force free the memory including unicode builds (128bytes). This is to ensure that you have a "clean" variable.
Am I correct with this assumption? :think:
Yes! In other words: Once the function returns, VarSetCapacity() can be used to find the binary data length.
:)
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joedf
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Re: Base64ToComByteArray() :: Include image in script and display it with WIA 2.0

24 Aug 2017, 11:13

Thanks! :)
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Windows 10 x64 Professional, Intel i5-8500 @ 3.00 GHz, 16GB DDR4 3200 MHz, NVIDIA GTX 1060 6GB | [About Me] | [ASPDM - StdLib Distribution]
[Populate the AHK MiniCity!] | [Qonsole - Quake-like console emulator] | [LibCon - Autohotkey Console Library] | [About the AHK Foundation]
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Delta Pythagorean
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Re: Base64ToComByteArray() :: Include image in script and display it with WIA 2.0

25 Aug 2017, 07:01

Works great! I think I might use this in a few projects I'm working on.

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