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qwert

Display bitmap from memory without GDI+?

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I've been using GDI+ to display bitmap images directly from memory as shown in several examples on this forum.  Here's a snippet of the method:

Global $image = "0x89504E470D0A1A0A0000000D49 ... etc.  ; hex value of image to display

_GDIPlus_Startup()  
$iPic = GUICtrlCreatePic("", 100, 50, 20, 20)
$hPic = GUICtrlGetHandle($iPic)
$hHBitmap = _GDIPlus_BitmapCreateFromMemory(Binary($image), True)
_WinAPI_DeleteObject(_SendMessage($hPic, $STM_SETIMAGE, 0, $hHBitmap))
_GDIPlus_Shutdown()

But I have a case where I only want to place a single small bitmap on a GUI.  Starting and stopping GDI+ seems like a lot of overhead when the bitmap already exists in a variable.

Is there a way to display a bitmap from memory without using GDI+?

Thanks in advance for any help.

 

 

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#2 ·  Posted (edited)

What do you mean with overhead? I don't see a overhead here.

 

Put _GDIPlus_Startup() at the top of your script and when exiting just _GDIPlus_Shutdown. 2 calls is not an overhead.

Edited by UEZ

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By "overhead", I mean 1) added size to the compiled script size and 2) additional execution time at run time.

Are you saying that there's no "cost" in CPU time of starting and stopping GDI+?  Is it truly negligible?

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is there any difference (size, speed) when you do it with resources? I imagine most every solution is going to take a hit somewhere, but i would be interested if you see any noticeable differences 

#AutoIt3Wrapper_Res_File_Add="C:\Program Files (x86)\AutoIt3\Examples\GUI\msoobe.jpg" , rt_rcdata, TEST_JPG_1
#include<resources.au3>

$gui = GUICreate("Data from resources simple example 1",400,150)
$pic1 = GUICtrlCreatePic("",0,0,400,150)
_ResourceSetImageToCtrl($pic1, "TEST_JPG_1") ; set JPG image to picture control from resource
GUISetState(@SW_SHOW)

While 1
 If GUIGetMsg() = -3 Then Exit
WEnd

,-. .--. ________ .-. .-. ,---. ,-. .-. .-. .-.
|(| / /\ \ |\ /| |__ __||| | | || .-' | |/ / \ \_/ )/
(_) / /__\ \ |(\ / | )| | | `-' | | `-. | | / __ \ (_)
| | | __ | (_)\/ | (_) | | .-. | | .-' | | \ |__| ) (
| | | | |)| | \ / | | | | | |)| | `--. | |) \ | |
`-' |_| (_) | |\/| | `-' /( (_)/( __.' |((_)-' /(_|
'-' '-' (__) (__) (_) (__)

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boththose, I see what you're suggesting.  But in Resources.au3 I see:

Func _SetBitmapToCtrl($CtrlId, $hBitmap)

Since I already have the bitmap in the form of:

$image = "0x89504E470D0A1A0A0000000D49 ... etc.  ; hex value of image to display

... shouldn't I be able to directly place it with that call?  (not that I see how at this moment!)

And, yes, I'll attempt to measure whatever I come up with against the GDI+ method.

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Since I already have the bitmap in the form of:

$image = "0x89504E470D0A1A0A0000000D49 ... etc.  ; hex value of image to display

... shouldn't I be able to directly place it with that call?

 

 

I could be up to 100% wrong with this answer,

 

but to use resources for this I think you would have to

 

1) #AutoIt3Wrapper_Run_Before and echo that text back to an output file

2) #AutoIt3Wrapper_Res_File_Add that output file  as ResourceSetImageToCtrl requires the name you set in this directive.

 

GDI is looking pretty sweet.


,-. .--. ________ .-. .-. ,---. ,-. .-. .-. .-.
|(| / /\ \ |\ /| |__ __||| | | || .-' | |/ / \ \_/ )/
(_) / /__\ \ |(\ / | )| | | `-' | | `-. | | / __ \ (_)
| | | __ | (_)\/ | (_) | | .-. | | .-' | | \ |__| ) (
| | | | |)| | \ / | | | | | |)| | `--. | |) \ | |
`-' |_| (_) | |\/| | `-' /( (_)/( __.' |((_)-' /(_|
'-' '-' (__) (__) (_) (__)

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By "overhead", I mean 1) added size to the compiled script size and 2) additional execution time at run time.

Are you saying that there's no "cost" in CPU time of starting and stopping GDI+?  Is it truly negligible?

 

Each function runs in a few milliseconds! Loading the encoded image takes some more milliseconds. Normally your are loading the image once only, not permanently!

About the size:, if you are using binary strings within your script the compiled exe size is larger than adding the image as resources to your script.

You can use both variants for your scripts. I personally use only the binary encoded strings within my scripts.


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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Thanks to you both.

I think you've given me what I need to explore each alternative.  Maybe then I can take a shot at a minimal version of _SendImage that I can embed.

_SendMessage($hPic, $STM_SETIMAGE, 0, $hHBitmap)

Regarding script size, I'm most concerned about the footprint of the script when it's running.  The particular one I'm working on could have several copies active at the same time ... so I don't want basic inefficiencies to adding.  (Ideally, they would share some structure that contained common resources, but I'm not technically ready to explore that at this point.  Everything needs to be working first.)

 

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