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Danny769 · Joined: 01 Feb 2006 Posts: 55

I need to load several images in sequence to imatate a movie.
All it does is crash

I currently load a picture in place for background, and then bliz it and flip it.

It does about 9 and then crashes.
Any ideas?

I need closer to 200 images to load, and yes i relize that is asking alot of lua, but how would i go about doing it, in a maner that will work

RanDom_ErrOr · Joined: 15 Apr 2006 Posts: 13

wouldnt it be easier to make a .gif or a .avi and then render that as a texture onto a sprite that is the same size as the screen (or whatever size you need)

that way you can do things like dynamic resizing, layering, alpha transperiencies... etc... etc... etc...

Danny769 · Joined: 01 Feb 2006 Posts: 55

Do you have an example as for the code for avi?

And will it look like a vid?

Giuliano · Joined: 13 Sep 2005 Posts: 78

Why do you need to load 200 images and how big are they ? I can't think of a reason why you would need this, the best way is to load each as necessary (ie: if in a game env't then load necessary imgs for each level)

imhotep · Joined: 13 Dec 2005 Posts: 41

1. code please
2. use timers and load a new image when timer:time()>timelimit
3. don't load all images before the loop, the psp doesn't have that much resources
4. unassign the old picture when the new one is blitted
5. oldpic=""

Danny769 · Joined: 01 Feb 2006 Posts: 55

How do i unasign a pic.

All i have been doing is loding a new on to replace it

KawaGeo · Joined: 27 Aug 2005 Posts: 191 Location: Calif Mountains

No need to unassign anything in Lua. Use the same variable name for a new value of *any* type. Lua has a built-in garbage collector to take care of cleaning up inside.
_________________
Geo Massar
Retired Engineer

Altair · Joined: 20 May 2006 Posts: 76 Location: The Netherlands

Yeah i was wondering how that works. It doesn't clean it up when you use another variable, right? Because if i do that and i don't empty the old var. myself, it crashes if i do that a couple of times.

KawaGeo · Joined: 27 Aug 2005 Posts: 191 Location: Calif Mountains

All global non-nil variables can be left untouched in the namespace. It has been advised to declare all variables as locals if possible since they can be garbage-collected sooner or later automatically.

All parameters in every Lua function are locals.
_________________
Geo Massar
Retired Engineer

romero126 · Joined: 24 Dec 2005 Posts: 200

The crash sounds like a memory error, try freeing up images as you display them and dont load them all up at once. That could possibly be your biggest issue.

Altair · Joined: 20 May 2006 Posts: 76 Location: The Netherlands

romero126 · Joined: 24 Dec 2005 Posts: 200

1000x1000px?

The limits on the PSP is only 480x272px size

Altair · Joined: 20 May 2006 Posts: 76 Location: The Netherlands

KawaGeo · Joined: 27 Aug 2005 Posts: 191 Location: Calif Mountains

A single 1000x1000 image loaded would eat up about 4MB of VRAM, would it?

The VRAM is only 32MB in PSP, I believe.

PS Is it VRAM or just RAM?
_________________
Geo Massar
Retired Engineer

Altair · Joined: 20 May 2006 Posts: 76 Location: The Netherlands

i dont know if its vram or ram, but the image itself is only 58 kB. Well thats the biggest. The others are smaller. I also have a 11 kB one.

KawaGeo · Joined: 27 Aug 2005 Posts: 191 Location: Calif Mountains

Aren't they all compressed before loading?

When loaded unto the memory, each image is uncompressed, that's, pixel by pixel, correct?
_________________
Geo Massar
Retired Engineer

Teggles · Joined: 16 Jan 2006 Posts: 27

LuaPlayer cannot support loading images larger than 512x512. Fact.

For your "animation", you'd do something like this:

image = Image.load("")
screen:clear()
screen:blit(0, 0, image)
screen.flip()
image = Image.load("")
screen.waitVblankStart(25)

...then back to the screen:clear and go from there. The vBlank function is how long it will stay on screen. Note this is only an example.

romero126 · Joined: 24 Dec 2005 Posts: 200

Im so glad teggles came to this website. Its about time.

youresam · Joined: 06 Nov 2005 Posts: 87

I have heard that LuaPlayer can load 1000x1000 jpgs, but I havent tried it out.

I was helping someone out with code today, and the same thing happened. For some reason, a 480x272 image takes up exactly 1mb RAM. Now, with Lowser, Lua has only 16mb to use.

As for how to remove images, you should.
theimage = nil
collectgarbage()

that will remove the image from memory then garbage collect to rid of it forever.

KawaGeo · Joined: 27 Aug 2005 Posts: 191 Location: Calif Mountains

Altair · Joined: 20 May 2006 Posts: 76 Location: The Netherlands

Ok im getting a little tired of this. How about you guys try something out yourself first. Im using a 1000x1000 JPG image of 58 kB and it works. It wont work with PNG but it does with JPG. And yoursam I was the one who told you this remember?