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f841e7c4fb
alpha channels on png layer (new blit algos), several bugfixes git-svn-id: svn://dyne.org/rastasoft/freej/freej@33 383723c8-4afa-0310-b8a8-b1afb83214fc
50 lines
2.0 KiB
Plaintext
50 lines
2.0 KiB
Plaintext
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On Sat, Aug 24, 2002 at 10:45:41PM -0700, Jamie Zawinski wrote:
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> > my dream now is to implement into it a way to play screensavers as
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> > "layers", possibly loading them runtime after scanning a directory
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> > where
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> > they are available, at a fixed resolution of 400x300 32bpp.
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>
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> That should be easy -- all of the hacks shipped with xscreensaver take
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> a -window-id option, causing them to draw on the provided window. So
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> you'd just create an (unmapped) 400x300 Window object, and pass the ID
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> of that to the screensaver. Then you'd pull the bits off the window
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> as
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> fast as you could manage, and composite them into your video frame.
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> Does that work?
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not bad as an idea, would be a lovely simple solution! i tried it and
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the problem is i can't syncronize the frames refreshing: the screensaver
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then keeps on running on the unmapped window and i never know when it's
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the right time to take the frames between refreshes.
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i see the same problem would be there even calling the screenhack()
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routine which is present in almost all of the hacks (bouboule for
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instance does'nt have one, strange!).
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in fact there is no standardization on the init_ and draw_ function
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names, if there would be one i'd be able to control those functions
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whatever the screensaver is. what is standard is the fact they take
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always Display* and Window* pointers (sometimes the draw_ routine
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something more).
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whenever i will find the time to do that, i think i will include
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xscreensaver sourcecode into FreeJ and slightly change the hacks code to
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make all the functions called just init() and draw(), then it should be
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ok to dinamically load them as plugins and use your unmapped window
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trick to get the frames!
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maybe you are interested in integrating such a dlopen() - DSO mechanism
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into xscreensaver? being practical, i doubt it would be really useful
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anyway... but its stylish to have plugins :))))
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** fix a stable api for DSO video filters!
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things that implement the fun:
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** new filters
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documentation to be done:
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** howto code a plugin
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