AutoHotkey Community

[holomind]

I played around with DC and DllCalls a little bit and built it into a Screen Magnifier similar to the one built in at Windows/Accessories.

The advantage of this vs. the builtin.

* you have the sourcecode and can customize it
* you can enable antializing (the built in has none!)
* you can set the speed of repaint (delay in ms with the slider, windows default is about 1000ms)
* you can define different zoomlevels, even unmagnify (shrink)

Due to a trick and using transparent 254 the window appears solid, but is invisible for BitBlt (DC_Copy), so the window does not copy itself and you even can magnify regions behind the loupe- window!

Like in the Builtin Magnifier, the mouseposition is watched and used for the selected region.

you also can resize the zoom window and the content is adopted automatically. (no distort, but large area)

I can even manage to zoom video (with 1-10ms delay) and watch it.
sometimes id like to zoom little flash-videos on websites without having to change my screen-resolution.

so now if somebody could find out how to save the contents of the DC to a file (BMP or other, DIB? Binarysave..) one could make nice tools with it.
=> solved see save screenshot with dgiplus only

there are many "mutations/variations" of this script, so choose the one you like. perhaps if find time to make a little "gallery" of the different versions and their differences. (there is no one size fits all, and the nice thing of having the sourcecode anybody can improve it)

this is the second code-section.
http://www.holomind.de/ahk/magnifier/magnifier_smooth.exe

[d-man]

That is sweet , good job !

[Titan]

Hell yeah, thanks.
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[holomind]

Thanks, i hope you like it.

Some things i noticed myself.

* 40ms delay is 1sec / 25, means 25Frames / sec, which should be enough for video playback. (so perhaps instead of ms show framerate ?)
* having a flash movie in background does not cause flicker when the zoom window is in foreground (having video with hardware overlay flickers )
* even quicktime and wmv can be zoomed. dont know why but it works. often its difficult to work with video as it gets blacked out.
* the antialize sometimes does not *kick in* when there is only text on the zoomed part. if there is a graphic or a button or windowborder antialize is normally on. (m$'s fault)
* as this is scriptable, one could make zoom my tray-icons on hover ? the mouse then is on the perfect correct position already!
* the zoomwindow could easily follow the mouse (winmove zoomwindow x%startx%-offset ...) and simulate a real "loupe"
* clickthrough could be good but idealy should not disable the gui-controls for slider and dropdown, also moving the window on the windowtitle.
so something like if coordmode mouse relative => getmousepos is inside region x0 y%toolbar% winw winH. then let mouseclicks through
ala $LButton::
;hide loupe
Send {Click}
;show loupe
Return
* the impact of antialize is quite recognizable, also the strech/zooming.
* simply copy with 1 zoom no antialize has very little speed impact.

[M. Phelps]

Your mission, holomind, if you accept it, is to
- Dock the ScreenMagnifier window in the top of the screen, without title bar, so when a window is created it can't overlap the magnifier's one (like in the original one)
- follow the text entered in dialog boxes, test fields, etc...
This SD Card will be destroyed in 10 seconds, and if you or one of your partners is dicovered, we'll say that we don't know anyone of you.

[holomind]

I added some funstuff, now you can simulate a real Loupe with win-x (on/off) where the window gets into a circle and follows your mouse.
you even can clickthrough with shift-leftMouseButton.

Actually its not so usefull (usability) but its fun.

[holomind]

[Titan]

Would it be possible to save the current image (as bitmap)?
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[holomind]

[holomind]

ist there a way to use CImage::Save
http://msdn2.microsoft.com/en-us/library/d06f3fhw.aspx

as a DLLCall (with help from gdi32.dll?) or similar..

this seams quite straightforward

[Blablabla]

My Dear Friend holomind:
Wow! What a holomind!

Here's my mod base on your code (and I prefer mine ):
Note:
Just move your mouse around!
Alt+Shift+WheelUp/Down to zoom in/out.
Win+X to exit.

[holomind]

[holomind]

Hi, i experimented a little bit and solved the flicker problem in a way:

the solution is not beatiful, but works.
now the Desktop (original) is copied to the Magnify image to restore the zoomed areas with the original. to make things faster and not repaint the whole screen all the time it only restores the zoomwindow.
so every second there is a full screen refresh to restore errors. also your desktop could have changed.

i sneaked in some hotkeys. so zoom also works with alt-shift-up down, not only mousewheel, and i can toggle antialize with alt-shilft a.

the bmp buffers are not needed here, they come from another script i copied but here the DCs are copied diretly!

I experimented with "Winset Region" and "Gui Show ..size" and "Winmove" but they all flicker. so this kind of doublebuffer works better.

it would be much better, to only change the size of the Magnifier window, but this flickers

i changed the dimensions to variables so you can change the radius easily.

when you comment "SetTimer, Init" and uncomment "SetTimer, ClipWindow", then you can see how slow the "WinSet Region" is.

i guess the "winset region" forces a full refresh/redraw of the Window!

[Laszlo]

These are very nice scripts! I did not think that a fully functional magnifier can be coded with 50 AHK commands!

I also played a little with both flavors, and found the original fixed window for the magnified image easier to use. Navigation is simpler if a frame is drawn around the magnified area. Also, if it could get partially out of the screen, ugly side effects occur, so we'd better keep this frame fully on screen. Interestingly, semi transparent windows remain invisible, even if the transparency level is set to full opaque (255).

I made a few more trivial changes, like finer control of the magnification, showing the current zoom factor in a TrayTip for a short time after a change and putting the window size in a variable (R) for easy change.

[holomind]