1 reply to this topic

[twiz]

When using "Gui,Color" to change the background color of a window, it will also change the color of all 0xF3F4F4 pixels, the default background color, in Indexed BMP as you can see in the image below. Both boxes are pixel-for-pixel the same, but the left one is saved as RGB, while the right one is an Indexed BMP.

http://i.imgur.com/J8J3tkJ.png

 

My sample script below shows the issue, it creates an Image folder in the Script Directory, and downloads the two images to that folder.

http://pastebin.com/AHKJG3RJ

#SingleInstance, Force
#NoEnv ; Recommended for performance and compatibility with future AutoHotkey releases.
#Warn  ; Recommended for catching common errors.
SetWorkingDir, %A_ScriptDir% ; Ensures a consistent starting directory.

Dropbox := "https://dl.dropboxusercontent.com/u/517697/AHK%20Stuff/"

IfNotExist, %A_ScriptDir%\images\
    FileCreateDir, %A_ScriptDir%\images\
IfNotExist, %A_ScriptDir%\images\F3F4F4_RGB.bmp
    UrlDownloadToFile, %Dropbox%F3F4F4_RGB.bmp, %A_ScriptDir%\images\F3F4F4_RGB.bmp
IfNotExist, %A_ScriptDir%\images\F3F4F4_Index.bmp
    UrlDownloadToFile, %Dropbox%F3F4F4_Index.bmp, %A_ScriptDir%\images\F3F4F4_Index.bmp

Gui, Color, FF00FF
Gui, Add, Picture, x5  y5 vBackground1 0x4000000, images\F3F4F4_RGB.bmp
Gui, Add, Picture, x+5 y5 vBackground2 0x4000000, images\F3F4F4_Index.bmp
Gui, Show, w115 h60
Return

GuiClose:
ExitApp

[Seidenweber]

Best Answer

AltSubmit does the job. ( http://www.autohotke...ols.htm#Picture )

Gui, Add, Picture, x+5 y5 vBackground2 0x4000000 AltSubmit, images\F3F4F4_Index.bmp

 

Specifying the word AltSubmit in Options tells the program to use Microsoft's GDIPlus.dll to load the image, which might result in a different appearance for GIF, BMP, and icon images. For example, it would load an ICO/GIF that has a transparent background as a transparent bitmap, which allows the BackgroundTrans option to take effect. If GDIPlus is not available (see next paragraph), AltSubmit is ignored and the image is loaded using the normal method.