[HowTo] Compare two images when loaded in Picture?

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After a while i'll post an example of the new system i've write.

(it's a personnal project, then, i'll just post a sample mfa, not my full project!)

[LB]

Surface Object also has an expression to get the alpha channel...

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I know that LB, but, i cannot make a test "pixels by pixels" on the Alpha Channel, it simply no work.

And the solution by checking the CRC work very well, BUT.. (there is a BUT..)..

It slowdown the FPS when a picture is saved on the disk.
(Each 20 seconds i save a picture from Surface object.. and each 20 seconds it make a slowndown to the FPS for a micro little time..)..

Then.. i have an another problem now..

EDIT: I think i've perhaps an idea (without checking the CRC object)

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So no, if i check pixels by pixels on AlphaAt() action with 2 loops (one for Width position ( and other for Height position (Y))..

When the check is processed, the game lose quickly somme FPS (and we gets a bad bad bad gameplay as it...)

So.. Any other idea (or any quiclky check algorythm idea?)

[LB]

Do you just want to compare two images or two files?

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Two images LB

For be precise: Two "Alpha Channel's Images" of each 1 PNG images stocked in a Surface Object.

(but 2 different Surface Objects)

If i use the method of Saving pictures each 20 seconds and compare with a CRC object.. => FPS slowdown quickly (10ms)

If i use the method of Comparing Alpha's Channel pixels by pixels each 20 seconds in 2 loops (one for X(WIDTH), other for Y(HEIGHT) ) => FPS slowdown quickly (10ms).

This two methods works very well but affect the performance of the game..

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So if i set-up in Global Events and NOT into the game frame..

Sometimes: FPS not slowdown, Sometimes: FPS slowdown..

This is making me ... well, you know what i mean..

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OK, it's good.

For your informations guys, the problem was:

Clickteam movement controller when taked by a loop slowdown the FPS. If while the loop, objects is moved.

Then, before the loop: Stop the movement
After the loop: Start the movement.

Thanks for your help LB, Hernan, and.. Looki (because its Surface's extension is the ONLY extension which can achieve what i research for!)

For the moment, it seem it's good..
But if i have an another problem, i come back here