[Solved] I've to RTFM

[SKAN]

WISH:
GuiControl,,,HBITMAP:%hBM% and Gui, Add, Picture,, HBITMAP:%hBM% should not stretch-to-fit the image when SS_CENTERIMAGE flag is in effect

If a 1000x1000 image is applied to a w100 h100 picture control then only the center 100² pixels should be displayed...
This is the default behaviour SS_CENTERIMAGE flag is in effect.
This wasn't important when Filename was used to create a picture control. Now that we have
HBITMAP: parameter as well as a LoadPicture() function, it is possible to find the dimensions
and scale down the image to perfectly fit the picture control.
I will post a working demo and link it here.

Meanwhile, here are snippets to show the problem.

Code: Select all

#NoEnv
#Warn
#SingleInstance, Force
SetWorkingDir %A_ScriptDir% 

IfNotExist, logo.png
URLDownloadToFile, https://autohotkey.com/assets/images/ahk-logo-no-text241x78-180.png, logo.png
hBM := LoadPicture( "logo.png" ) 

OPTIONS := ( SS_CENTERIMAGE := 0x200 )
Gui, Add, Picture, w400 h200 %OPTIONS% vPicture
GuiControl,, Picture, HBITMAP:%hbm%
Gui, Show,, SS_CENTERIMAGE is ignored by GuiControl
Return

GuiClose:
GuiEscape:
 ExitApp

Code: Select all

#NoEnv
#Warn
#SingleInstance, Force
SetWorkingDir %A_ScriptDir% 

IfNotExist, logo.png
URLDownloadToFile, https://autohotkey.com/assets/images/ahk-logo-no-text241x78-180.png, logo.png

hBM := LoadPicture( "logo.png" ) 

OPTIONS := ( SS_BITMAP := 0xE ) | ( SS_CENTERIMAGE := 0x200 )
Gui, Add, Picture, w400 h200 %OPTIONS% vPicture hwndhwndPic Border
oBM := DllCall( "SendMessage", "Ptr",hwndPic, "UInt",0x172, "Ptr",0, "Ptr",hBM ) ; STM_SETIMAGE = 0x172
Gui, Show,, Workaround with STM_SETIMAGE
Return

GuiClose:
GuiEscape:
 ExitApp

[Helgef]

Hello.

Specify *w0 *h0to use the image's actual width and height.

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Edit:

Is it alright with you if I delete this useless topic?

I do not mind.

[SKAN]

Hello.

Specify *w0 *h0to use the image's actual width and height.

Woah! Thanks Helgef!
Is it alright with you if I delete this useless topic?

[BoBo]

SKAAAAAN