(solved) im.Sepia to FileScreenshot()

[SONTSE]

Hi! I need to apply some image manipulators to my save screenshot.
like this:

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        imagebutton idle im.Sepia(FileScreenshot(i)) hover FileScreenshot(i) pos (515,140) action SetVariable("save_c",i) alternate SetVariable("load_c",i)

Unfortunately this does work only on already written save slot with existing image. if slot is empty, the function Returns "Null" displayable instead of Image, which is inoperable by Im.Sepia

So can I do something about this? My plan is to detect if the slot is empty and if that's the case, push a dummy image instead of FileScreenshot() function return. Something like this

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    def fs(x):
        st = FileScreenshot(x)
        if THE_SLOT_IS_EMPTY(x)  ####<<<<<< that function is what I need
            return "interface/270144.png"
        else:
            return FileScreenshot(x)   

what i need is a function, or any method to determine if queried slot is empty of if function return is not an image.

or maybe I need generally different approach. Please help me. Thanks

[philat]

I haven't tried running this, but the code from FileScreenshot itself (located in 00action_file.rpy) seems pretty straightforward.

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    def FS(name, empty=None, page=None):
        screenshot = renpy.slot_screenshot(__slotname(name, page))

        if screenshot is not None:
            return screenshot
        return "dummy image"

Wouldn't this work?

[SONTSE]

Thanks, philat!

Although not working right away, this code gave me a hint which led me to solution.
Works perfectly if i change this double-underlined function __slotname(name,page), which appears as "not defined", to a string str(page)+'-'+str(name), which is actual return of that function (according to 00action_file.rpy)

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    def fs(name, page=1):
        screenshot = renpy.slot_screenshot(str(page)+'-'+str(name))
        if screenshot is not None:
            return screenshot
        return "dummy_image.png"