The Image Effect Giver

[kraftman]

It's not long term storage :/

[slime]

Framebuffers/canvases will stay in VRAM all the time until they're gone, taking up space even when they aren't used, I think.

[kraftman]

Framebuffers/canvases will stay in VRAM all the time until they're gone, taking up space even when they aren't used, I think.

but if you're using the same one each time its ok?

[Rad3k]

Framebuffers/canvases will stay in VRAM all the time until they're gone, taking up space even when they aren't used, I think.

but if you're using the same one each time its ok?

AFAIK, with hardware accelerated graphics, moving things between regular RAM and VRAM is a relatively expensive operation. So if you keep frequently used sprites (or textures) in VRAM, then you actually get a speed benefit.

[kraftman]

But the speed of using a shader + framebuffer is 1.7 billion times faster than using mapPixel(etc)

[Jasoco]

The point is FrameBuffers don't just disappear if not used, right? They're permanent until destroyed manually.

[Rad3k]

You can save framebuffer's contents back to imagedata (with :getImageData), so I don't see why framebuffers (combined with shaders) couldn't (or shouldn't) be used for image effects, if this would speed up calculations. But, like The Burrito pointed out, you can't rely on them working on every computer, so it's always good to have a fallback using :MapPixel.

The point is FrameBuffers don't just disappear if not used, right? They're permanent until destroyed manually.

If you keep a reference to them, then probably yes. If not, then I think Löve should automatically free them when they're garbage-collected.

[GijsB]

Guys, back on topic plase xD?
Give me some ideas for effects

[vrld]

Implement convolution. Using that you can do a lot of stuff, like blur, sharpening, edge detection, corner detection, emboss, ...

[Jasoco]

The point is FrameBuffers don't just disappear if not used, right? They're permanent until destroyed manually.

If you keep a reference to them, then probably yes. If not, then I think Löve should automatically free them when they're garbage-collected.

What do you mean "keep a reference to them"?