Best lib?

[basfreak]

Hi,

Im wondering what is the best lib to use for a 2D game, OSLib?
Also i there a sample that plays a PMF movie?

Greetz.

[wicked_fable]

Well, OSLib is very popular. It was used to make many things lately like Sakya's LightMP3 application and SG57's Boxhead: PSP Style game. In my opinion, it seems like a pretty good option. Do a little bit of research and you can see what it can do.

[basfreak]

Ok, and is there a tutorial on how to install?
I tried one time but i failed

[wicked_fable]

Yup: http://oslib.playeradvance.org/doku.php?id=day1

[Anti-QuickJay]

Yea I think oslib is the best for 2d.

[Xsjado7]

http://www.psp-hacks.com/forums/viewtopic.php?id=66708

[basfreak]

And is there a easy way to animate?
Or just in a while i++
and load image[i] ?

[Raphael]

triEngine supports both sprite animation and playback of .pmp videos. The latter can even easily be taken apart and integrated into any other library.
http://www.fx-world.org/wordpress/?p=43

[SG57]

I wrote an animation class for OSlib. I need to update it to have a memory management system (so you can have say 2 of hte same animations going at once yet they use the same resources).

[homemister91]

how fast is openTRI?

[Raphael]

As fast as you can get a PSP engine without directly interfacing the hardware

[_df_]

Well I always liked SDL, since its portable and I can write the same game with little to no change for my desktop, psp + gp2x. Having a PC version helps so much in debugging.

[Raphael]

True, but using SDL comes at the cost of a big speed penalty on PSP. Matter of choice though really - speed vs. portability.

[SG57]

Raphael - IIRC SDL was converted to use the GU and is much faster then the old software rendering...

[wololo]

An alternative is JGE++ which allows to develop the game for both PSP and windows, it makes debbugging and development really easy.
It has been discontinued but has quite a lot of features.

http://jge.khors.com

[Raphael]

Originally Posted by SG57

Raphael - IIRC SDL was converted to use the GU and is much faster then the old software rendering...

Yeah, there seems to be some gu code inserted and also an option to link to PSPGL... but then again, SDL is just a big hack in itself IMO. It tries to push other APIs (like OGL or DX) inside it's own rather limited (again IMO) interface. Definately not my type of choice, but anyone can make up his own mind on this.

[brethren]

i've just done a rough port of sdl game engine from here http://www.zefix.tv/sge2d/
and i have to say that i'm not impressed with the speed of sdl on the psp. i think its probably better to stick with libraries developed specifically for the psp....who knows maybe iwn will finally release pge

[basfreak]

Anyone tips @ pmf playing and animation?

[Raphael]

Well, .pmp is basically a .pmf, just in a different container but if you specifically need a .pmf player you're pretty much out of luck - the closest you can get is by using the pmf sample code from magiK on ps2dev.org back from when he found the avc decoding mechanism. It's not too noob-friendly really though and integrating it into a library isn't all that easy.
If you just want an easy out-of-box solution for video playback, there's nothing else than pmplib from triEngine.

[homemister91]

BTW i have been using OSLib and started using openTRI and it seams from my point of view that OSLib is more nood freindly, but openTRI has a faster rendering engine.

[Raphael]

it seams from my point of view that OSLib is more nood freindly, but openTRI has a faster rendering engine.

Well, I'd call it a fact But in regards to the pmplib, you cannot make video playback any noob-friendlier

Code from the sample:

int main(int argc, char **argv)
{
	SetupCallbacks();
	triLogInit();
	
	char* result = pmp_init();
	if (result != 0)
	{
		triLogPrint("ERROR: %s\n", result);
		sceKernelExitGame();
	}
	printf("pmp_init() succeeded.\n");

	// playback can always be interrupted by pressing START
	result = pmp_play( "test.pmp", 1, GU_PSM_4444 );
	if (result != 0)
	{
		triLogPrint("ERROR: %s\n", result);
		sceKernelExitGame();
	}
	
	while (isrunning && pmp_isplaying())
	{
		sceKernelDelayThread(1000);
	}
	pmp_stop();

	triLogShutdown();
	sceKernelExitGame();
	return 0;
}

If you take out the safety checks and common code, it's 5 lines of code to playback a video and wait for it to finish

[homemister91]

yeh i agree.
But i was talking about 2d rendering and image loading.
OSLib has much more functionality.
-=Double Post Merge =-
How can i maximise openTRI's image drawing. I am using vram and swizzle ATM.

[xart]

I too using openTRI for OpenChoice project, OSLib is a good lib for getting started but you will bump into issues, and openTRI comes in source code type so can fix any errors in the lib that you find quite easy.

I like openTRI as it has some realy nice functions and is designed for the PSP
and supports simple 2d image stuff easer than OSLib, I found it lacking on images

[Raphael]

Originally Posted by homemister91

How can i maximise openTRI's image drawing. I am using vram and swizzle ATM.

If you want to do scaling/blending on the images, try to use paletted images where possible. Maybe I'm gonna include a quantizer to palettize truecolor images to 8/4bit sometime in the future. For quality it's probably better to use a good graphics software like Photoshop or GIMP to do that step.
If you just need raw blits of images without scaling or transparency (background tilemap) then try to use the same pixelformat as you setup your framebuffer with, without swizzling and use the triBltSprite function. That's the fastest image drawing you will ever get (at the cost of no blending,etc.)

[homemister91]

thx i will try it
-=Double Post Merge =-
do i use it like this;

triImage* image;
image = triImageLoad(luaL_checkst ring(L, 1), TRI_VRAM);
triBltSprite(x, y,0.0f,0.0f, image);

[Raphael]

Originally Posted by homemister91

thx i will try it
-=Double Post Merge =-
do i use it like this;

Parameters are same as triDrawSprite, so yes.
It needs a call to

void triSpriteMode( triFloat width, triFloat height, triFloat angle );

beforehand though to set the width/height of the sprite drawing.
So just add a triSpriteMode( image->width, image->height, 0.f ); after the triImageLoad call.

NOTE TO SELF: Add a fallback to image width/height if triSpriteMode isn't set.

[homemister91]

thx
I am now using openTRI as the core for LPHMv2
Awesome
-=Double Post Merge =-
how do i draw the sprite with alpha?
-=Double Post Merge =-
don't worry i got it now.

[_dysfunctional]

That's the fastest image drawing you will ever get (at the cost of no blending,etc.)

.